/* roulang page: index */
:root {
  --bg: #080C10;
  --bg-deep: #0A0E12;
  --surface: #10161D;
  --card: #151D25;
  --line: rgba(255,255,255,.08);
  --line-strong: rgba(255,255,255,.14);
  --brand: #37F2B5;
  --brand-deep: #0B9F77;
  --amber: #FFB13D;
  --coral: #FF5C7A;
  --text: #EAF2F8;
  --muted: #8B9DB0;
  --dim: #5D6F82;
  --radius-card: 16px;
  --radius-btn: 999px;
  --radius-img: 12px;
  --radius-module: 24px;
  --shadow: 0 10px 30px rgba(0,0,0,.25);
  --shadow-hover: 0 18px 40px rgba(0,0,0,.35);
  --section-space: clamp(56px, 8vw, 104px);
  --font-body: "PingFang SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { background: none; border: none; font: inherit; cursor: pointer; }
input, textarea { font: inherit; }
ul, ol { list-style: none; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,.14); border-radius: 20px; }
::-webkit-scrollbar-track { background: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 10px;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
@media (min-width:1280px) {
  .container { padding-left: 48px; padding-right: 48px; }
}
.section { padding: var(--section-space) 0; position: relative; }
.section-head { max-width: 720px; margin-bottom: 38px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(55,242,181,.1);
  color: var(--brand);
  border: 1px solid rgba(55,242,181,.18);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .18em;
}
.h-section {
  font-size: clamp(1.45rem, 2.6vw, 2rem);
  line-height: 1.25;
  margin: 14px 0 10px;
  font-weight: 800;
  letter-spacing: .01em;
}
.section-lead { color: var(--muted); font-size: .95rem; max-width: 640px; }
.hot-title-word { color: var(--brand); }
.text-nowrap { white-space: nowrap; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  min-width: 120px;
  padding: 0 26px;
  border-radius: var(--radius-btn);
  font-weight: 700;
  font-size: .95rem;
  transition: background .2s,color .2s,border-color .2s,box-shadow .2s,transform .2s;
}
.btn-primary {
  background: var(--brand);
  color: #07130E;
  box-shadow: 0 6px 20px rgba(55,242,181,.18);
}
.btn-primary:hover {
  background: #6DF6C9;
  box-shadow: 0 0 24px rgba(55,242,181,.35);
  transform: translateY(-2px);
}
.btn-primary:active { transform: scale(.98); }
.btn-ghost {
  background: rgba(255,255,255,.04);
  color: var(--text);
  border: 1px solid rgba(255,255,255,.22);
}
.btn-ghost:hover {
  border-color: var(--amber);
  color: #fff;
  background: rgba(255,177,61,.06);
  transform: translateY(-2px);
}
.btn-ghost:active { transform: scale(.98); }
.btn-amber {
  background: var(--amber);
  color: #1C1003;
  box-shadow: 0 6px 20px rgba(255,177,61,.22);
}
.btn-amber:hover {
  background: #FFC767;
  transform: translateY(-2px);
}
.app-shell { min-height: 100vh; }
.app-main {
  margin-left: 256px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.app-sidebar {
  width: 256px;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  background: var(--bg-deep);
  border-right: 1px solid rgba(234,242,248,.06);
  display: flex;
  flex-direction: column;
  z-index: 80;
  transition: transform .28s ease;
}
.sidebar-head {
  padding: 26px 20px 20px;
  border-bottom: 1px solid var(--line);
  position: relative;
}
.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--brand), var(--amber));
  display: grid;
  place-items: center;
  color: #0A0E12;
  font-size: 20px;
  font-weight: 900;
  box-shadow: 0 4px 18px rgba(55,242,181,.2);
  flex: 0 0 42px;
}
.brand-text { line-height: 1.3; }
.brand-text strong {
  display: block;
  font-size: 1.02rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: .02em;
}
.brand-text small {
  display: block;
  margin-top: 2px;
  font-size: 11px;
  color: var(--dim);
  letter-spacing: .14em;
}
.sidebar-close {
  display: none;
  position: absolute;
  right: 12px;
  top: 18px;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  color: var(--muted);
}
.sidebar-nav { flex: 1; overflow-y: auto; padding: 18px 16px 14px; }
.nav-group {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .3em;
  color: var(--dim);
  margin: 10px 12px 8px;
  font-weight: 700;
}
.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 13px;
  min-height: 48px;
  padding: 0 20px;
  margin: 4px 0;
  border-radius: 12px;
  color: var(--muted);
  font-weight: 600;
  font-size: .94rem;
  transition: background .2s,color .2s,transform .2s;
}
.nav-link i { width: 20px; text-align: center; color: var(--dim); transition: color .2s; }
.nav-link:hover { background: rgba(255,255,255,.06); color: #fff; }
.nav-link:hover i { color: var(--brand); }
.nav-link.active {
  background: rgba(55,242,181,.08);
  color: var(--brand);
}
.nav-link.active i { color: var(--brand); }
.nav-link.active::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 50%;
  width: 3px;
  height: 24px;
  transform: translateY(-50%);
  background: var(--brand);
  border-radius: 3px;
  box-shadow: 0 0 12px rgba(55,242,181,.8);
}
.sidebar-footer { padding: 16px; border-top: 1px solid var(--line); }
.status-card {
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 13px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 4px rgba(55,242,181,.15), 0 0 14px rgba(55,242,181,.6);
  flex: 0 0 9px;
}
.status-card span { font-size: .82rem; color: var(--muted); }
.sidebar-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(2,4,6,.72);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s;
  z-index: 70;
}
.sidebar-backdrop.show { opacity: 1; pointer-events: auto; }
.mobile-topbar {
  display: none;
  height: 64px;
  align-items: center;
  gap: 12px;
  padding: 0 18px;
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(10,14,18,.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.mobile-topbar .menu-toggle {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 1.1rem;
  display: grid;
  place-items: center;
}
.mobile-brand { font-weight: 800; font-size: 1rem; color: #fff; }
.mobile-help {
  margin-left: auto;
  font-size: .8rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
}
@media (max-width: 1023px) {
  .app-sidebar { transform: translateX(-100%); }
  .app-sidebar.open { transform: translateX(0); box-shadow: 0 30px 80px rgba(0,0,0,.55); }
  .app-main { margin-left: 0; }
  .mobile-topbar { display: flex; }
  .sidebar-close { display: grid; place-items: center; }
}
.hero {
  position: relative;
  min-height: clamp(480px, 78vh, 720px);
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 76px 0 64px;
}
.hero-bg,
.cta-banner-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero-bg { background-image: url('/assets/images/backpic/back-1.webp'); }
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(8,12,16,.97) 0%, rgba(8,12,16,.82) 44%, rgba(8,12,16,.42) 100%),
    linear-gradient(0deg, rgba(8,12,16,.6), rgba(8,12,16,.18) 60%, rgba(8,12,16,.4) 100%);
}
.hero-content { position: relative; z-index: 2; width: 100%; }
.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, .72fr);
  gap: 42px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(2rem, 4.4vw, 3.5rem);
  line-height: 1.15;
  font-weight: 900;
  margin: 20px 0 16px;
  letter-spacing: -.01em;
  text-wrap: balance;
}
.hero h1 .gradient-text {
  background: linear-gradient(100deg, var(--brand) 10%, #A0F7DA 45%, var(--amber) 110%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-subtitle { color: var(--muted); font-size: 1.02rem; max-width: 560px; margin-bottom: 30px; line-height: 1.9; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.trust-points {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin-top: 26px;
  color: var(--muted);
  font-size: .85rem;
}
.trust-points li { display: flex; align-items: center; gap: 8px; }
.trust-points i { color: var(--brand); width: 16px; }
.phone-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 8px 0 8px 10px;
}
.phone-shell {
  width: min(320px, 100%);
  background: #060A0D;
  border-radius: 44px;
  padding: 13px;
  border: 1px solid #2A3943;
  box-shadow: 0 40px 90px rgba(0,0,0,.52), 0 12px 30px rgba(0,0,0,.4);
  position: relative;
}
.phone-shell::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 104px;
  height: 6px;
  background: #0E151B;
  border-radius: 999px;
  z-index: 2;
}
.phone-screen {
  border-radius: 34px;
  background: var(--surface);
  overflow: hidden;
  padding: 22px 18px 24px;
  min-height: 520px;
  display: flex;
  flex-direction: column;
  border: 1px solid rgba(255,255,255,.06);
}
.phone-status {
  display: flex;
  justify-content: space-between;
  font-size: 11px;
  color: var(--dim);
  padding: 2px 2px 14px;
  letter-spacing: .05em;
}
.phone-app-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 4px 18px;
  border-bottom: 1px solid var(--line);
}
.phone-app-head i { color: var(--brand); font-size: 24px; }
.phone-app-head strong { font-size: .95rem; color: #fff; }
.phone-tabs { display: flex; margin: 16px 0 18px; background: rgba(255,255,255,.04); padding: 4px; border-radius: 12px; }
.phone-tabs span {
  flex: 1;
  text-align: center;
  font-size: .8rem;
  padding: 7px 0;
  border-radius: 9px;
  color: var(--muted);
}
.phone-tabs span.active { background: var(--brand); color: #0A0E12; font-weight: 700; }
.phone-form { display: flex; flex-direction: column; gap: 14px; margin-top: 4px; }
.phone-label { font-size: .75rem; color: var(--muted); }
.phone-input {
  background: rgba(255,255,255,.05);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
  color: var(--text);
  font-size: .82rem;
  min-height: 46px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.phone-input i { color: var(--dim); font-size: .85rem; }
.phone-submit {
  margin-top: 6px;
  height: 46px;
  border-radius: 999px;
  background: var(--brand);
  color: #07130E;
  font-weight: 800;
  font-size: .9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.phone-help { margin-top: 14px; text-align: center; font-size: .72rem; color: var(--dim); }
.phone-float {
  position: absolute;
  bottom: 6px;
  right: -32px;
  background: rgba(16,22,29,.95);
  border: 1px solid rgba(55,242,181,.25);
  border-radius: 16px;
  padding: 12px 16px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--brand);
  font-size: .72rem;
  max-width: 160px;
  z-index: 3;
}
@media (max-width: 1023px) {
  .hero-inner { grid-template-columns: 1fr; }
  .phone-wrap { order: 2; margin-top: 34px; }
  .phone-float { right: 0; }
}
@media (max-width: 640px) {
  .hero-actions .btn { width: 100%; }
  .phone-shell { width: min(290px, 90%); }
}
.scroll-snap {
  display: flex;
  gap: 20px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 18px;
  scrollbar-width: thin;
  scrollbar-color: rgba(55,242,181,.3) transparent;
}
.scroll-snap > * { scroll-snap-align: start; }
.hot-card {
  flex: 0 0 auto;
  width: min(240px, 72vw);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 10px;
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.hot-card:hover {
  transform: translateY(-5px);
  border-color: rgba(55,242,181,.4);
  box-shadow: var(--shadow-hover);
}
.hot-cover {
  position: relative;
  aspect-ratio: 3/4;
  border-radius: 14px;
  overflow: hidden;
  background: #0B1117;
}
.hot-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.hot-card:hover .hot-cover img { transform: scale(1.06); }
.hot-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0) 40%, rgba(0,0,0,.55) 100%);
}
.hot-rank {
  position: absolute;
  top: 10px;
  left: 10px;
  z-index: 2;
  background: rgba(8,12,16,.72);
  backdrop-filter: blur(10px);
  color: var(--amber);
  border: 1px solid rgba(255,177,61,.4);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .1em;
}
.hot-play {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(.7);
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: rgba(55,242,181,.3);
  border: 1px solid rgba(55,242,181,.6);
  backdrop-filter: blur(10px);
  display: grid;
  place-items: center;
  color: #fff;
  opacity: 0;
  transition: opacity .25s, transform .25s;
}
.hot-card:hover .hot-play { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.hot-duration {
  position: absolute;
  right: 10px;
  bottom: 10px;
  z-index: 2;
  font-size: .68rem;
  background: rgba(8,12,16,.74);
  color: var(--text);
  padding: 3px 8px;
  border-radius: 999px;
}
.hot-desc {
  color: var(--dim);
  font-size: .72rem;
  margin-top: 6px;
  line-height: 1.5;
}
.hot-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 12px 4px 1px;
  font-weight: 700;
  color: #fff;
  font-size: .97rem;
}
.hot-title i { color: var(--brand); font-size: .8rem; opacity: 0; transform: translateX(-6px); transition: opacity .2s, transform .2s; }
.hot-card:hover .hot-title i { opacity: 1; transform: translateX(0); }
@media (max-width: 640px) {
  .hot-card { padding: 8px; }
}
.prep-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 0 24px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.prep-item {
  display: grid;
  grid-template-columns: 52px 1fr 36px;
  gap: 14px;
  align-items: start;
  padding: 28px 8px;
  border-bottom: 1px solid var(--line);
  transition: background .2s, transform .2s;
}
.prep-item:nth-last-child(-n+2) { border-bottom: 0; }
.prep-item:hover { background: rgba(55,242,181,.02); transform: translateX(6px); }
.prep-num {
  font-family: "Barlow Condensed","DIN Alternate",Arial,sans-serif;
  font-weight: 900;
  font-size: 2.1rem;
  line-height: 1;
  color: var(--amber);
  letter-spacing: .02em;
  margin-top: 6px;
}
.prep-content h3 { font-size: 1.08rem; font-weight: 800; color: #fff; margin-bottom: 8px; }
.prep-content p { color: var(--muted); font-size: .86rem; line-height: 1.7; max-width: 420px; }
.prep-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.prep-tag {
  background: rgba(55,242,181,.08);
  color: var(--brand);
  border: 1px solid rgba(55,242,181,.16);
  border-radius: 999px;
  font-size: .7rem;
  padding: 2px 10px;
  letter-spacing: .05em;
}
.prep-arrow { color: var(--dim); font-size: 1rem; margin-top: 8px; transition: color .2s, transform .2s; }
.prep-item:hover .prep-arrow { color: var(--brand); transform: translateX(4px); }
@media (max-width: 768px) {
  .prep-list { grid-template-columns: 1fr; }
  .prep-item:nth-last-child(-n+2) { border-bottom: 1px solid var(--line); }
  .prep-item:last-child { border-bottom: 0; }
}
.review-band { background: var(--bg-deep); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.review-scroll {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 10px;
}
.review-scroll > * { scroll-snap-align: start; }
.review-card {
  flex: 0 0 320px;
  max-width: 340px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 200px;
}
.review-head { display: flex; align-items: center; gap: 12px; }
.avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-weight: 800;
  color: #07130E;
  flex: 0 0 42px;
}
.avatar-1 { background: linear-gradient(135deg, var(--brand), #8CF5D4); }
.avatar-2 { background: linear-gradient(135deg, var(--amber), #FFD79A); }
.avatar-3 { background: linear-gradient(135deg, #7A9CF5, #C0D3FF); }
.avatar-4 { background: linear-gradient(135deg, #F587A0, #FFC3D2); }
.name-line { flex: 1; }
.reviewer-name { font-weight: 700; color: #fff; font-size: .95rem; }
.review-source { font-size: .73rem; color: var(--dim); margin-top: 2px; }
.review-source i { margin-right: 4px; color: var(--muted); }
.stars { color: var(--amber); font-size: .82rem; letter-spacing: .15em; }
.review-card blockquote { color: var(--muted); font-size: .88rem; line-height: 1.8; flex: 1; }
.review-meta-tag {
  align-self: flex-start;
  background: rgba(255,255,255,.05);
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: .72rem;
  border-radius: 999px;
  padding: 2px 11px;
}
.review-note { margin-top: 14px; color: var(--dim); font-size: .75rem; display: flex; align-items: center; gap: 8px; }
.review-note i { color: var(--amber); }
@media (max-width: 640px) {
  .review-card { flex-basis: 280px; }
}
.cta-banner {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-module);
  padding: clamp(32px, 5vw, 68px);
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow);
}
.cta-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8,12,16,.9) 0%, rgba(8,12,16,.72) 60%, rgba(8,12,16,.44) 100%);
}
.cta-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 0%, rgba(55,242,181,.18), transparent 50%), linear-gradient(0deg, rgba(8,12,16,.35), transparent 70%);
  pointer-events: none;
}
.cta-inner { position: relative; z-index: 2; }
.cta-inner h2 { font-size: clamp(1.6rem, 3vw, 2.6rem); font-weight: 900; line-height: 1.25; margin: 6px 0 14px; }
.cta-inner p { color: var(--muted); max-width: 620px; margin-bottom: 30px; font-size: .96rem; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; }
@media (max-width: 640px) {
  .cta-banner { padding: 28px 22px; }
  .cta-actions .btn { width: 100%; }
}
.latest-section { padding-bottom: var(--section-space); }
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 20px;
}
.news-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.news-card:hover { transform: translateY(-4px); border-color: rgba(55,242,181,.35); box-shadow: var(--shadow-hover); }
.news-card-link { display: flex; flex-direction: column; height: 100%; padding: 22px 20px; }
.news-card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 16px; }
.news-tag {
  display: inline-block;
  background: rgba(55,242,181,.1);
  color: var(--brand);
  border: 1px solid rgba(55,242,181,.2);
  border-radius: 999px;
  padding: 3px 12px;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .08em;
}
.news-card-head i { color: var(--dim); transition: color .2s, transform .2s; }
.news-card:hover .news-card-head i { color: var(--brand); transform: translate(2px, -2px); }
.news-title { color: #fff; font-weight: 800; font-size: 1.08rem; line-height: 1.55; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 3.2em; }
.news-excerpt { color: var(--muted); font-size: .84rem; line-height: 1.75; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.news-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--dim); font-size: .78rem; }
.news-meta time { display: inline-flex; align-items: center; gap: 6px; }
.news-meta span { color: var(--brand); font-weight: 600; font-size: .8rem; }
@media (max-width: 768px) {
  .news-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 560px) {
  .news-grid { grid-template-columns: 1fr; }
}
.empty-state {
  background: var(--card);
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-card);
  padding: 52px 24px;
  text-align: center;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.empty-state .empty-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  background: rgba(255,177,61,.1);
  border: 1px solid rgba(255,177,61,.22);
  display: grid;
  place-items: center;
  color: var(--amber);
  font-size: 1.35rem;
}
.empty-state p { font-size: .95rem; }
.site-footer { border-top: 1px solid var(--line); background: var(--bg-deep); }
.footer-brand-row { padding: 46px 0 34px; border-bottom: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 24px; align-items: center; justify-content: space-between; }
.footer-brand { display: flex; align-items: center; gap: 13px; }
.footer-brand .brand-logo { width: 40px; height: 40px; flex-basis: 40px; font-size: 18px; }
.footer-desc { color: var(--muted); font-size: .9rem; max-width: 560px; }
.footer-grid { display: grid; grid-template-columns: 1.55fr 1fr 1fr 1fr; gap: 38px; padding: 38px 0 20px; }
.footer-col h4 { color: #fff; font-weight: 700; font-size: .95rem; margin-bottom: 14px; letter-spacing: .04em; }
.footer-col ul li + li { margin-top: 4px; }
.footer-col a {
  display: inline-block;
  padding: 5px 0;
  color: var(--muted);
  font-size: .87rem;
  transition: color .2s, transform .2s;
}
.footer-col a:hover { color: var(--brand); transform: translateX(3px); }
.footer-logo-mark { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.footer-logo-mark strong { font-size: 1.1rem; color: #fff; }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 20px 0 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  color: var(--dim);
  font-size: .8rem;
}
.footer-bottom .legal { display: flex; gap: 18px; flex-wrap: wrap; }
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand-row { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 1023px) {
  .hero { padding: 52px 0 32px; }
}

/* roulang page: article */
:root {
      --page-bg: #080C10;
      --panel: #10161D;
      --card: #151D25;
      --sidebar-bg: #0A0E12;
      --line: rgba(255, 255, 255, 0.08);
      --primary: #37F2B5;
      --primary-dark: #0B9F77;
      --hot: #FFB13D;
      --danger: #FF5C7A;
      --text: #EAF2F8;
      --muted: #8B9DB0;
      --dim: #5D6F82;
      --radius-card: 16px;
      --radius-pill: 999px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      -webkit-text-size-adjust: 100%;
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      background: var(--page-bg);
      color: var(--text);
      font-family: "PingFang SC", "Source Han Sans SC", "Microsoft YaHei", -apple-system, sans-serif;
      line-height: 1.7;
      min-height: 100vh;
    }

    h1, h2, h3, h4, p {
      margin: 0;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    button {
      font: inherit;
      border: 0;
      cursor: pointer;
    }

    img {
      max-width: 100%;
      display: block;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .app-main {
      min-height: 100vh;
      width: 100%;
    }

    .app-sidebar {
      position: fixed;
      inset: 0 auto 0 0;
      width: 256px;
      background: var(--sidebar-bg);
      border-right: 1px solid var(--line);
      padding: 24px 16px;
      display: flex;
      flex-direction: column;
      z-index: 60;
      transition: transform 0.26s ease;
    }

    .sidebar-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 8px 12px 24px;
      border-bottom: 1px solid var(--line);
      margin-bottom: 20px;
    }

    .brand-logo {
      width: 40px;
      height: 40px;
      flex: 0 0 40px;
      border-radius: 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      color: #081512;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      box-shadow: 0 8px 22px rgba(55, 242, 181, 0.22);
    }

    .brand-name {
      color: #fff;
      font-weight: 800;
      font-size: 1.06rem;
      letter-spacing: 0.02em;
    }

    .sidebar-nav {
      display: flex;
      flex-direction: column;
      gap: 4px;
      flex: 1;
    }

    .nav-group {
      font-size: 0.7rem;
      text-transform: uppercase;
      letter-spacing: 0.18em;
      color: var(--dim);
      padding: 0 12px;
      margin-bottom: 8px;
    }

    .nav-link {
      display: flex;
      align-items: center;
      gap: 12px;
      min-height: 48px;
      padding: 0 20px;
      border-radius: 12px;
      color: var(--muted);
      font-weight: 600;
      font-size: 0.9rem;
      position: relative;
      transition: background 0.2s, color 0.2s;
    }

    .nav-link i {
      width: 20px;
      text-align: center;
      font-size: 0.95rem;
      color: var(--dim);
    }

    .nav-link:hover {
      background: rgba(255, 255, 255, 0.06);
      color: var(--text);
    }

    .nav-link:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }

    .nav-link:active {
      transform: scale(0.99);
    }

    .nav-link.active {
      background: rgba(55, 242, 181, 0.08);
      color: var(--primary);
    }

    .nav-link.active::before {
      content: "";
      position: absolute;
      left: 0;
      top: 13px;
      bottom: 13px;
      width: 3px;
      background: var(--primary);
      border-radius: var(--radius-pill);
    }

    .nav-link.active i {
      color: var(--primary);
    }

    .sidebar-bottom {
      margin-top: 20px;
      padding-top: 18px;
      border-top: 1px solid var(--line);
    }

    .status-card {
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: 14px;
      padding: 14px 16px;
      color: var(--muted);
    }

    .status-line {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--text);
    }

    .status-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 10px rgba(55, 242, 181, 0.5);
    }

    .status-detail {
      font-size: 0.72rem;
      color: var(--dim);
      margin-top: 8px;
    }

    .mobile-topbar {
      display: none;
      align-items: center;
      gap: 12px;
      height: 64px;
      padding: 0 20px;
      background: var(--sidebar-bg);
      border-bottom: 1px solid var(--line);
      position: sticky;
      top: 0;
      z-index: 50;
    }

    .menu-toggle {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--text);
      background: var(--panel);
      border: 1px solid var(--line);
      transition: background 0.2s;
    }

    .menu-toggle:hover {
      background: rgba(255, 255, 255, 0.08);
      color: var(--primary);
    }

    .menu-toggle:focus-visible {
      outline: 2px solid var(--primary);
    }

    .mobile-brand {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 800;
      color: #fff;
    }

    .mobile-logo {
      width: 34px;
      height: 34px;
      border-radius: 11px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: #081512;
      font-size: 14px;
    }

    .mobile-cta {
      margin-left: auto;
      height: 36px;
      padding: 0 14px;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      background: rgba(55, 242, 181, 0.12);
      color: var(--primary);
      font-size: 0.8rem;
      font-weight: 700;
    }

    .drawer-overlay {
      display: none;
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.6);
      z-index: 55;
      backdrop-filter: blur(2px);
    }

    @media (min-width: 1024px) {
      .app-main {
        margin-left: 256px;
        width: calc(100% - 256px);
      }

      .mobile-topbar {
        display: none;
      }

      .app-sidebar {
        transform: translateX(0) !important;
      }
    }

    @media (max-width: 1023.98px) {
      .app-sidebar {
        transform: translateX(-106%);
        box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
      }

      .app-sidebar.open {
        transform: translateX(0);
      }

      .mobile-topbar {
        display: flex;
      }

      .drawer-overlay.show {
        display: block;
      }

      body.sidebar-open {
        overflow: hidden;
      }
    }

    .section-padding {
      padding-top: clamp(48px, 7vw, 84px);
      padding-bottom: clamp(48px, 7vw, 84px);
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--primary);
      margin-bottom: 14px;
    }

    .block-title {
      font-size: clamp(1.5rem, 3vw, 2.2rem);
      font-weight: 800;
      line-height: 1.25;
      color: #fff;
      letter-spacing: -0.02em;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 48px;
      padding: 0 24px;
      border-radius: var(--radius-pill);
      font-weight: 700;
      font-size: 0.9rem;
      min-width: 120px;
      transition: transform 0.18s, box-shadow 0.18s, border-color 0.18s, background 0.18s;
    }

    .btn:active {
      transform: scale(0.98);
    }

    .btn-primary {
      background: var(--primary);
      color: #081512;
    }

    .btn-primary:hover {
      box-shadow: 0 0 24px rgba(55, 242, 181, 0.35);
      filter: brightness(1.05);
    }

    .btn-primary:focus-visible {
      outline: 2px solid #fff;
      outline-offset: 3px;
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.24);
      color: var(--text);
    }

    .btn-secondary:hover {
      border-color: var(--hot);
      color: var(--hot);
    }

    .btn-secondary:focus-visible {
      outline: 2px solid var(--hot);
      outline-offset: 3px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      height: 28px;
      padding: 0 12px;
      border-radius: var(--radius-pill);
      background: rgba(55, 242, 181, 0.12);
      color: var(--primary);
      font-size: 0.75rem;
      font-weight: 700;
    }

    .article-hero {
      position: relative;
      background: var(--panel);
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid var(--line);
      overflow: hidden;
    }

    .article-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(8, 12, 16, 0.84), rgba(8, 12, 16, 0.96));
    }

    .article-hero-inner {
      position: relative;
      z-index: 2;
      padding: clamp(40px, 7vw, 84px) 0 clamp(36px, 6vw, 72px);
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
      color: var(--muted);
      font-size: 0.82rem;
      margin-bottom: 22px;
    }

    .breadcrumb a {
      transition: color 0.2s;
    }

    .breadcrumb a:hover {
      color: var(--primary);
    }

    .breadcrumb i {
      font-size: 0.7rem;
      color: var(--dim);
    }

    .article-hero .badge {
      background: rgba(55, 242, 181, 0.15);
      border: 1px solid rgba(55, 242, 181, 0.25);
    }

    .article-title {
      max-width: 920px;
      font-size: clamp(1.7rem, 4vw, 2.9rem);
      font-weight: 900;
      line-height: 1.3;
      color: #fff;
      letter-spacing: -0.02em;
      margin: 18px 0 22px;
    }

    .article-meta {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 18px;
      color: var(--muted);
      font-size: 0.82rem;
    }

    .article-meta span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .article-meta i {
      color: var(--primary);
    }

    .article-section {
      padding-top: clamp(40px, 6vw, 64px);
      padding-bottom: 0;
    }

    .article-body {
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: 24px;
      padding: clamp(24px, 5vw, 56px);
      max-width: 900px;
      margin: 0 auto;
    }

    .article-content {
      max-width: 780px;
      margin: 0 auto;
      color: #CBD6E5;
      font-size: 1rem;
      line-height: 1.9;
    }

    .article-content p {
      margin: 0 0 1.2rem;
    }

    .article-content h2,
    .article-content h3,
    .article-content h4 {
      color: #fff;
      position: relative;
      margin: 2.4rem 0 1rem;
      font-weight: 800;
      line-height: 1.4;
    }

    .article-content h2 {
      font-size: 1.6rem;
      padding-left: 14px;
    }

    .article-content h2::before {
      content: "";
      position: absolute;
      left: 0;
      top: 8px;
      bottom: 8px;
      width: 4px;
      border-radius: 99px;
      background: linear-gradient(180deg, var(--primary), rgba(55, 242, 181, 0.2));
    }

    .article-content h3 {
      font-size: 1.25rem;
    }

    .article-content h4 {
      font-size: 1.05rem;
    }

    .article-content a {
      color: var(--primary);
      transition: color 0.2s;
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .article-content a:hover {
      color: #fff;
    }

    .article-content ul,
    .article-content ol {
      margin: 0 0 1.4rem;
      padding-left: 1.5rem;
    }

    .article-content ul {
      list-style: disc;
    }

    .article-content ol {
      list-style: decimal;
    }

    .article-content ul li,
    .article-content ol li {
      margin-bottom: 0.6rem;
    }

    .article-content img {
      border-radius: 16px;
      border: 1px solid var(--line);
      margin: 28px 0;
      background: #0d1117;
    }

    .article-content blockquote {
      border-left: 4px solid var(--primary);
      background: rgba(55, 242, 181, 0.08);
      padding: 18px 22px;
      border-radius: 0 14px 14px 0;
      margin: 24px 0;
      color: var(--text);
    }

    .article-content pre {
      background: #0d1117;
      border: 1px solid var(--line);
      border-radius: 16px;
      padding: 20px;
      overflow-x: auto;
      margin: 24px 0;
      color: #d6e3f0;
    }

    .article-content code {
      font-family: "SFMono-Regular", Consolas, monospace;
      font-size: 0.9em;
    }

    .article-content table {
      width: 100%;
      border-collapse: collapse;
      margin: 24px 0;
      border-radius: 12px;
      overflow: hidden;
      display: block;
      overflow-x: auto;
    }

    .article-content th,
    .article-content td {
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 12px 14px;
      text-align: left;
      vertical-align: top;
    }

    .article-content th {
      background: var(--card);
      color: #fff;
      font-weight: 700;
    }

    .article-content hr {
      border: 0;
      border-top: 1px solid var(--line);
      margin: 32px 0;
    }

    .article-tags {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 42px;
      padding-bottom: 26px;
      border-bottom: 1px solid var(--line);
    }

    .tag-label {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--muted);
      font-size: 0.82rem;
      margin-right: 4px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      height: 30px;
      padding: 0 14px;
      background: var(--card);
      border: 1px solid var(--line);
      color: var(--muted);
      font-size: 0.76rem;
      border-radius: 999px;
      transition: border-color 0.2s, color 0.2s;
    }

    .tag:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .post-nav {
      display: grid;
      grid-template-columns: 1fr;
      gap: 14px;
      margin: 32px 0 16px;
    }

    @media (min-width: 640px) {
      .post-nav {
        grid-template-columns: 1fr 1fr;
      }
    }

    .post-nav-card {
      background: var(--card);
      border: 1px solid var(--line);
      border-radius: 16px;
      padding: 18px 20px;
      transition: border-color 0.2s, transform 0.2s, background 0.2s;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .post-nav-card span {
      font-size: 0.75rem;
      color: var(--dim);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .post-nav-card strong {
      color: var(--text);
      font-size: 0.92rem;
    }

    .post-nav-card:hover {
      background: rgba(255, 255, 255, 0.04);
      border-color: rgba(55, 242, 181, 0.35);
      transform: translateY(-2px);
    }

    .post-nav-card:active {
      transform: scale(0.99);
    }

    .author-strip {
      display: flex;
      align-items: center;
      gap: 16px;
      background: var(--card);
      border: 1px solid var(--line);
      border-radius: 16px;
      padding: 18px;
      margin-top: 12px;
      flex-wrap: wrap;
    }

    .author-strip img {
      width: 52px;
      height: 52px;
      border-radius: 16px;
      object-fit: cover;
      border: 1px solid var(--line);
    }

    .author-info strong {
      display: block;
      color: #fff;
      font-size: 0.9rem;
      margin-bottom: 2px;
    }

    .author-info p {
      color: var(--muted);
      font-size: 0.8rem;
      line-height: 1.6;
    }

    .missing-wrap {
      display: flex;
      align-items: center;
      justify-content: center;
      padding: clamp(60px, 10vw, 120px) 24px;
    }

    .missing-card {
      max-width: 520px;
      width: 100%;
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: 24px;
      text-align: center;
      padding: 48px 28px;
    }

    .missing-card > i {
      font-size: 3rem;
      color: var(--primary);
      margin-bottom: 18px;
      display: inline-block;
    }

    .missing-card h2 {
      color: #fff;
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .missing-card p {
      color: var(--muted);
      margin-bottom: 24px;
    }

    .related-section {
      padding-top: clamp(48px, 7vw, 84px);
      padding-bottom: clamp(48px, 7vw, 64px);
    }

    .related-head {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 20px;
      margin-bottom: 28px;
    }

    .related-head .link-all {
      color: var(--muted);
      font-size: 0.84rem;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: color 0.2s;
    }

    .related-head .link-all:hover {
      color: var(--primary);
    }

    .related-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 22px;
    }

    @media (min-width: 640px) {
      .related-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (min-width: 980px) {
      .related-grid {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    .cover-card {
      display: block;
      background: var(--card);
      border: 1px solid var(--line);
      border-radius: 18px;
      overflow: hidden;
      transition: transform 0.22s, border-color 0.22s, box-shadow 0.22s;
    }

    .cover-card:hover {
      transform: translateY(-4px);
      border-color: rgba(55, 242, 181, 0.45);
      box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
    }

    .cover-card:active {
      transform: scale(0.99);
    }

    .cover-card .cover-img {
      aspect-ratio: 16 / 9;
      background: var(--panel);
      overflow: hidden;
    }

    .cover-card .cover-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .cover-body {
      padding: 20px;
    }

    .cover-body .badge {
      margin-bottom: 12px;
    }

    .cover-body h3 {
      color: #fff;
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 6px;
    }

    .cover-body p {
      color: var(--muted);
      font-size: 0.85rem;
      line-height: 1.7;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .page-cta {
      margin-top: 16px;
      background-size: cover;
      background-position: center;
      background-color: var(--panel);
      position: relative;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .page-cta::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(8, 12, 16, 0.9), rgba(8, 12, 16, 0.72));
    }

    .cta-inner {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
      padding: clamp(40px, 6vw, 70px) 0;
      flex-wrap: wrap;
    }

    .cta-inner h2 {
      color: #fff;
      font-size: clamp(1.3rem, 2.4vw, 1.8rem);
      font-weight: 800;
      line-height: 1.4;
      max-width: 640px;
    }

    .cta-inner p {
      color: var(--muted);
      margin-top: 10px;
      max-width: 620px;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .site-footer {
      background: var(--sidebar-bg);
      border-top: 1px solid rgba(55, 242, 181, 0.18);
      margin-top: 0;
    }

    .footer-brand-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding: 36px 0 20px;
      border-bottom: 1px solid var(--line);
      flex-wrap: wrap;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 14px;
    }

    .footer-desc {
      color: var(--dim);
      font-size: 0.83rem;
      max-width: 420px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 30px;
      padding: 32px 0;
    }

    @media (min-width: 640px) {
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (min-width: 980px) {
      .footer-grid {
        grid-template-columns: 1.2fr 1fr 1fr 1fr;
      }
    }

    .footer-logo-mark {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 14px;
      color: #fff;
      font-weight: 800;
    }

    .footer-col h4 {
      font-size: 0.84rem;
      color: #fff;
      margin-bottom: 14px;
      font-weight: 800;
    }

    .footer-col ul {
      list-style: none;
      padding: 0;
      margin: 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col ul li a {
      color: var(--muted);
      font-size: 0.82rem;
      transition: color 0.2s, padding-left 0.2s;
    }

    .footer-col ul li a:hover {
      color: var(--primary);
      padding-left: 4px;
    }

    .footer-bottom {
      border-top: 1px solid var(--line);
      padding: 20px 0 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      color: var(--dim);
      font-size: 0.8rem;
    }

    @media (max-width: 520px) {
      .container {
        padding: 0 16px;
      }

      .btn {
        width: 100%;
      }

      .btn + .btn {
        margin-top: 10px;
      }

      .article-body {
        padding: 22px 18px;
        border-radius: 18px;
      }

      .author-strip {
        align-items: flex-start;
      }

      .cta-actions {
        width: 100%;
      }

      .cta-actions .btn {
        width: auto;
      }
    }

/* roulang page: category1 */
:root {
    --bg: #080C10;
    --panel: #10161D;
    --card: #151D25;
    --line: rgba(255, 255, 255, 0.08);
    --primary: #37F2B5;
    --primary-deep: #0B9F77;
    --amber: #FFB13D;
    --coral: #FF5C7A;
    --text: #EAF2F8;
    --muted: #8B9DB0;
    --dim: #5D6F82;
    --radius-card: 16px;
    --radius-panel: 24px;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
    --shadow-hover: 0 18px 40px rgba(0, 0, 0, 0.35);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Source Han Sans SC", "Microsoft YaHei", "Barlow Condensed", -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  img {
    display: block;
    max-width: 100%;
  }

  button,
  input,
  summary {
    font-family: inherit;
  }

  ::selection {
    background: rgba(55, 242, 181, 0.24);
  }

  :focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 3px;
  }

  .p-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 256px;
    z-index: 70;
    display: flex;
    flex-direction: column;
    background: #0A0E12;
    border-right: 1px solid var(--line);
    padding: 22px 14px 20px;
    gap: 18px;
    overflow-y: auto;
    transition: transform 0.25s ease;
  }

  .sidebar-brand-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 6px;
  }

  .brand-lockup {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .brand-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-deep));
    color: #080C10;
    font-size: 1.05rem;
    box-shadow: 0 0 22px rgba(55, 242, 181, 0.18);
    flex-shrink: 0;
  }

  .brand-name {
    color: #fff;
    font-weight: 900;
    font-size: 1.06rem;
    letter-spacing: 0.01em;
    white-space: nowrap;
  }

  .sidebar-close {
    display: none;
    width: 34px;
    height: 34px;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 10px;
    color: var(--muted);
    cursor: pointer;
  }

  .sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 8px;
  }

  .nav-group {
    font-size: 0.72rem;
    color: var(--dim);
    letter-spacing: 0.12em;
    padding: 0 20px 6px;
  }

  .nav-link {
    position: relative;
    display: flex;
    align-items: center;
    gap: 12px;
    height: 48px;
    padding: 0 20px;
    border-radius: 12px;
    color: var(--muted);
    font-weight: 600;
    font-size: 0.94rem;
    transition: background 0.18s ease, color 0.18s ease;
  }

  .nav-link i {
    width: 18px;
    text-align: center;
    font-size: 0.95rem;
    color: var(--dim);
    transition: color 0.18s ease;
  }

  .nav-link:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #fff;
  }

  .nav-link.active {
    background: rgba(55, 242, 181, 0.08);
    color: var(--text);
  }

  .nav-link.active i {
    color: var(--primary);
  }

  .nav-link.active::before {
    content: "";
    position: absolute;
    left: 6px;
    top: 13px;
    bottom: 13px;
    width: 3px;
    border-radius: 999px;
    background: var(--primary);
    box-shadow: 0 0 10px rgba(55, 242, 181, 0.5);
  }

  .sidebar-health {
    margin-top: auto;
    padding: 14px;
    background: rgba(255, 255, 255, 0.035);
    border: 1px solid var(--line);
    border-radius: 14px;
  }

  .health-title {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
    font-size: 0.85rem;
    font-weight: 700;
  }

  .status-dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 999px;
    background: var(--primary);
    box-shadow: 0 0 8px rgba(55, 242, 181, 0.7);
    flex-shrink: 0;
  }

  .sidebar-health p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 0.78rem;
    line-height: 1.6;
  }

  .page-wrap {
    min-height: 100vh;
    margin-left: 256px;
  }

  .mobile-topbar {
    display: none;
    position: sticky;
    top: 0;
    z-index: 55;
    height: 64px;
    padding: 0 18px;
    background: rgba(8, 12, 16, 0.86);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
    align-items: center;
    gap: 14px;
  }

  .mobile-menu-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    cursor: pointer;
  }

  .mobile-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
    font-weight: 900;
    font-size: 0.95rem;
  }

  .menu-overlay {
    position: fixed;
    inset: 0;
    z-index: 65;
    background: rgba(4, 7, 10, 0.58);
    backdrop-filter: blur(3px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
  }

  .menu-overlay.is-visible {
    opacity: 1;
    visibility: visible;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
  }

  .site-main {
    padding-bottom: 8px;
  }

  .content-section {
    padding: clamp(40px, 7vw, 76px) 0;
  }

  .category-hero {
    position: relative;
    margin-top: 26px;
    padding: clamp(32px, 5vw, 58px);
    border-radius: var(--radius-panel);
    overflow: hidden;
    border: 1px solid var(--line);
    background:
      linear-gradient(120deg, rgba(8, 12, 16, 0.96), rgba(16, 22, 29, 0.84)),
      url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
    box-shadow: var(--shadow);
  }

  .hero-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(330px, 0.9fr);
    gap: clamp(28px, 5vw, 64px);
    align-items: center;
  }

  .category-hero h1 {
    margin: 14px 0 12px;
    color: #fff;
    font-size: clamp(1.9rem, 4vw, 3.1rem);
    font-weight: 900;
    line-height: 1.18;
    letter-spacing: 0.01em;
  }

  .brand-inline {
    display: inline-block;
    white-space: nowrap;
  }

  .hero-lead {
    margin: 0 0 24px;
    max-width: 610px;
    color: var(--muted);
    font-size: clamp(1rem, 1.4vw, 1.12rem);
    line-height: 1.85;
  }

  .hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }

  .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    color: var(--muted);
    font-size: 0.76rem;
    background: rgba(255, 255, 255, 0.03);
    letter-spacing: 0.03em;
  }

  .hero-tag i {
    color: var(--primary);
  }

  .hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin: 26px 0 30px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    min-width: 132px;
    height: 48px;
    padding: 0 24px;
    border-radius: 999px;
    border: 0;
    font-weight: 800;
    font-size: 0.93rem;
    cursor: pointer;
    transition: transform 0.16s ease, background 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
  }

  .btn:active {
    transform: scale(0.98);
  }

  .btn-primary {
    background: var(--primary);
    color: #08100D;
    box-shadow: 0 0 0 rgba(55, 242, 181, 0);
  }

  .btn-primary:hover {
    background: #69F7C9;
    box-shadow: 0 0 24px rgba(55, 242, 181, 0.35);
  }

  .btn-ghost {
    background: rgba(255, 255, 255, 0.04);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
  }

  .btn-ghost:hover {
    border-color: var(--amber);
    color: var(--amber);
  }

  .hero-points {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 22px;
    color: var(--muted);
    font-size: 0.83rem;
  }

  .hero-points span {
    display: inline-flex;
    align-items: center;
    gap: 7px;
  }

  .hero-points i {
    color: var(--primary);
    font-size: 0.82rem;
  }

  .hero-device {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 26px 0;
  }

  .phone-frame {
    width: 280px;
    max-width: 100%;
    background: #070B0E;
    border: 8px solid var(--card);
    border-radius: 34px;
    padding: 7px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 255, 255, 0.06);
  }

  .phone-screen {
    position: relative;
    height: 512px;
    border-radius: 24px;
    background: var(--panel);
    overflow: hidden;
    display: flex;
    flex-direction: column;
  }

  .phone-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 34px;
    padding: 0 16px;
    color: var(--muted);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
  }

  .phone-app-brand {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 0 14px;
    color: #fff;
    font-weight: 800;
    font-size: 0.88rem;
    height: 42px;
  }

  .phone-app-brand .app-dot {
    width: 7px;
    height: 7px;
    border-radius: 999px;
    background: var(--primary);
  }

  .phone-screen-pic {
    margin: 6px 14px 10px;
    height: 118px;
    border-radius: 14px;
    overflow: hidden;
  }

  .phone-screen-pic img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
  }

  .phone-label {
    display: block;
    font-size: 0.68rem;
    color: var(--dim);
    margin: 0 16px 4px;
  }

  .phone-field {
    margin: 0 14px 12px;
    height: 42px;
    border-radius: 10px;
    border: 1px solid var(--line);
    background: rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    color: var(--dim);
    font-size: 0.72rem;
  }

  .phone-login-btn {
    margin: 4px 14px 8px;
    height: 42px;
    border: 0;
    border-radius: 10px;
    background: var(--primary);
    color: #08100D;
    font-weight: 800;
    font-size: 0.82rem;
    cursor: default;
  }

  .phone-screen-note {
    padding: 0 18px;
    text-align: center;
    color: var(--dim);
    font-size: 0.68rem;
    line-height: 1.5;
  }

  .floating-chip {
    position: absolute;
    z-index: 3;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 13px;
    border-radius: 999px;
    background: rgba(21, 29, 37, 0.92);
    border: 1px solid rgba(55, 242, 181, 0.18);
    color: var(--muted);
    font-size: 0.73rem;
    backdrop-filter: blur(8px);
    box-shadow: var(--shadow);
  }

  .chip-up {
    top: 0;
    right: 0;
  }

  .chip-down {
    bottom: 0;
    left: 0;
  }

  .floating-chip i {
    color: var(--amber);
  }

  .breadcrumbs {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    color: var(--dim);
    font-size: 0.82rem;
    margin-bottom: 18px;
  }

  .breadcrumbs a {
    transition: color 0.18s ease;
  }

  .breadcrumbs a:hover {
    color: var(--primary);
  }

  .section-heading {
    margin-bottom: 28px;
  }

  .section-label {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.08em;
  }

  .section-label::before {
    content: "";
    width: 18px;
    height: 2px;
    background: var(--primary);
    border-radius: 999px;
  }

  .section-heading h2,
  .section-title {
    margin: 12px 0 8px;
    color: #fff;
    font-size: clamp(1.45rem, 2.6vw, 2.1rem);
    font-weight: 800;
    line-height: 1.35;
  }

  .section-heading p {
    margin: 0;
    color: var(--muted);
    max-width: 760px;
    font-size: 0.95rem;
    line-height: 1.85;
  }

  .route-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
  }

  .route-item {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: linear-gradient(0deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.02)), var(--card);
    border: 1px solid var(--line);
    border-radius: 18px;
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .route-item:hover {
    transform: translateY(-3px);
    border-color: rgba(55, 242, 181, 0.32);
    box-shadow: var(--shadow-hover);
  }

  .route-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: rgba(55, 242, 181, 0.09);
    color: var(--primary);
    font-size: 1.1rem;
  }

  .route-body h3 {
    margin: 0 0 6px;
    color: #fff;
    font-size: 1.1rem;
    font-weight: 800;
    line-height: 1.4;
  }

  .route-body p {
    margin: 0 0 10px;
    color: var(--muted);
    font-size: 0.88rem;
    line-height: 1.75;
  }

  .route-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.72rem;
  }

  .tag i {
    color: var(--amber);
    font-size: 0.7rem;
  }

  .scene-list {
    display: grid;
    gap: 18px;
  }

  .scene-card {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 20px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 14px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .scene-card:hover {
    border-color: rgba(255, 177, 61, 0.3);
    box-shadow: var(--shadow-hover);
  }

  .scene-thumb {
    border-radius: 14px;
    overflow: hidden;
    height: 138px;
  }

  .scene-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .scene-body {
    padding: 6px 4px 4px 0;
  }

  .scene-body h3 {
    margin: 0 0 8px;
    color: #fff;
    font-size: 1.12rem;
    font-weight: 800;
  }

  .scene-body p {
    margin: 0;
    color: var(--muted);
    font-size: 0.88rem;
    line-height: 1.8;
  }

  .scene-meta {
    display: inline-block;
    margin-top: 10px;
    color: var(--dim);
    font-size: 0.75rem;
  }

  .process-panel {
    position: relative;
    padding: clamp(28px, 4vw, 48px);
    border-radius: var(--radius-panel);
    border: 1px solid var(--line);
    background:
      linear-gradient(115deg, rgba(8, 12, 16, 0.95), rgba(16, 22, 29, 0.82)),
      url("/assets/images/backpic/back-3.webp") center/cover no-repeat;
    overflow: hidden;
  }

  .process-panel h2 {
    margin-top: 12px;
  }

  .step-list {
    display: grid;
    gap: 0;
    margin-top: 30px;
  }

  .step-item {
    position: relative;
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 18px;
    padding-bottom: 28px;
  }

  .step-item:last-child {
    padding-bottom: 0;
  }

  .step-line {
    position: relative;
  }

  .step-line::after {
    content: "";
    position: absolute;
    left: 19px;
    top: 42px;
    bottom: -4px;
    width: 1px;
    background: rgba(255, 255, 255, 0.14);
  }

  .step-item:last-child .step-line::after {
    display: none;
  }

  .step-number {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: rgba(55, 242, 181, 0.1);
    border: 1px solid rgba(55, 242, 181, 0.24);
    color: var(--primary);
    font-family: "Barlow Condensed", "DIN Alternate", Arial, sans-serif;
    font-size: 1rem;
    font-weight: 800;
  }

  .step-text h3 {
    margin: 0 0 6px;
    color: #fff;
    font-size: 1.05rem;
    font-weight: 800;
  }

  .step-text p {
    margin: 0;
    color: var(--muted);
    font-size: 0.88rem;
    line-height: 1.8;
    max-width: 760px;
  }

  .safety-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .safety-item {
    display: flex;
    gap: 13px;
    padding: 18px 20px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--line);
    border-radius: 16px;
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.75;
  }

  .safety-item i {
    color: var(--primary);
    margin-top: 6px;
    font-size: 0.95rem;
    flex-shrink: 0;
  }

  .faq-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    align-items: start;
  }

  .faq-item {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 16px;
    overflow: hidden;
    transition: border-color 0.18s ease;
  }

  .faq-item[open] {
    border-color: rgba(55, 242, 181, 0.26);
  }

  .faq-item summary {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 52px;
    padding: 12px 18px;
    cursor: pointer;
    list-style: none;
    color: #fff;
    font-weight: 700;
    font-size: 0.94rem;
    line-height: 1.5;
  }

  .faq-item summary::-webkit-details-marker {
    display: none;
  }

  .faq-item summary::before {
    content: "+";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    flex-shrink: 0;
    background: rgba(55, 242, 181, 0.1);
    color: var(--primary);
    font-size: 1rem;
    font-weight: 800;
    line-height: 1;
    transition: transform 0.2s ease, background 0.2s ease;
  }

  .faq-item[open] summary::before {
    transform: rotate(45deg);
    background: rgba(255, 92, 122, 0.14);
    color: var(--coral);
  }

  .faq-item .faq-answer {
    padding: 0 18px 16px 52px;
    color: var(--muted);
    font-size: 0.88rem;
    line-height: 1.8;
  }

  .faq-item .faq-answer p {
    margin: 8px 0;
  }

  .faq-item .faq-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--primary);
    font-size: 0.83rem;
    font-weight: 700;
  }

  .cta-banner {
    position: relative;
    margin: clamp(24px, 5vw, 48px) 0 clamp(36px, 6vw, 64px);
    padding: clamp(26px, 4vw, 44px);
    border-radius: var(--radius-panel);
    overflow: hidden;
    border: 1px solid rgba(55, 242, 181, 0.2);
    background:
      linear-gradient(120deg, rgba(8, 12, 16, 0.94), rgba(16, 29, 24, 0.84)),
      url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    box-shadow: var(--shadow);
  }

  .cta-copy h2 {
    margin: 0 0 8px;
    color: #fff;
    font-size: clamp(1.4rem, 2.6vw, 2rem);
    font-weight: 900;
  }

  .cta-copy p {
    margin: 0;
    color: var(--muted);
    font-size: 0.92rem;
    max-width: 620px;
    line-height: 1.8;
  }

  .cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
  }

  .site-footer {
    background: #0A0E12;
    border-top: 1px solid var(--line);
    margin-top: clamp(30px, 6vw, 60px);
  }

  .site-footer .container {
    padding-top: 34px;
    padding-bottom: 26px;
  }

  .footer-brand-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--line);
    flex-wrap: wrap;
  }

  .footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .footer-brand .brand-logo {
    width: 38px;
    height: 38px;
    font-size: 1rem;
  }

  .footer-desc {
    color: var(--muted);
    font-size: 0.86rem;
    max-width: 480px;
    margin: 8px 0 0;
    line-height: 1.8;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 32px;
    padding: 34px 0 20px;
  }

  .footer-logo-mark {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-size: 1rem;
  }

  .footer-col h4 {
    margin: 0 0 14px;
    color: #fff;
    font-size: 0.86rem;
    font-weight: 800;
    letter-spacing: 0.04em;
  }

  .footer-col ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 10px;
  }

  .footer-col a {
    color: var(--muted);
    font-size: 0.85rem;
    transition: color 0.16s ease;
  }

  .footer-col a:hover {
    color: var(--primary);
  }

  .footer-bottom {
    margin-top: 16px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
    display: flex;
    justify-content: space-between;
    gap: 12px 18px;
    flex-wrap: wrap;
    color: var(--dim);
    font-size: 0.77rem;
  }

  .footer-bottom span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  @media (max-width: 1023px) {
    .p-sidebar {
      width: min(300px, 86vw);
      transform: translateX(-100%);
    }

    .p-sidebar.is-open {
      transform: translateX(0);
      box-shadow: 18px 0 46px rgba(0, 0, 0, 0.42);
    }

    .sidebar-close {
      display: inline-flex;
    }

    .page-wrap {
      margin-left: 0;
    }

    .mobile-topbar {
      display: flex;
    }

    .hero-layout {
      grid-template-columns: 1fr;
    }

    .hero-device {
      order: 2;
    }

    .section-heading br {
      display: none;
    }
  }

  @media (max-width: 860px) {
    .route-grid {
      grid-template-columns: 1fr;
    }

    .scene-card {
      grid-template-columns: 1fr;
    }

    .scene-thumb {
      height: 180px;
    }

    .safety-grid,
    .faq-grid {
      grid-template-columns: 1fr;
    }

    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }

    .footer-desc {
      max-width: 100%;
    }
  }

  @media (max-width: 640px) {
    .container {
      padding: 0 16px;
    }

    .category-hero {
      margin-top: 16px;
      padding: 24px 18px;
    }

    .hero-buttons .btn {
      width: 100%;
    }

    .phone-frame {
      width: 250px;
    }

    .phone-screen {
      height: 470px;
    }

    .cta-banner {
      display: block;
    }

    .cta-actions {
      margin-top: 18px;
    }

    .cta-actions .btn {
      flex: 1;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 26px;
    }

    .footer-brand-row {
      align-items: flex-start;
    }

    .scene-thumb {
      height: 150px;
    }
  }

  @media (max-width: 420px) {
    .hero-device {
      padding-top: 12px;
    }

    .floating-chip {
      font-size: 0.68rem;
      padding: 8px 10px;
    }

    .chip-up {
      right: auto;
      left: 0;
      top: -4px;
    }

    .chip-down {
      bottom: 4px;
    }
  }

/* roulang page: category3 */
:root{
  --bg:#080C10;
  --panel:#10161D;
  --card:#151D25;
  --line:rgba(255,255,255,0.08);
  --brand:#37F2B5;
  --brand-dark:#0B9F77;
  --amber:#FFB13D;
  --coral:#FF5C7A;
  --text:#EAF2F8;
  --muted:#8B9DB0;
  --dim:#5D6F82;
  --radius:16px;
  --radius-lg:24px;
  --shadow:0 10px 30px rgba(0,0,0,.25);
  --shadow-hover:0 18px 40px rgba(0,0,0,.35);
  --safe:env(safe-area-inset-bottom,0px);
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  font-family:"PingFang SC","Source Han Sans SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,sans-serif;
  background:var(--bg);
  color:var(--text);
  font-size:16px;
  line-height:1.7;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{text-decoration:none;color:inherit;}
button{font-family:inherit;cursor:pointer;}
ul,ol{list-style:none;}
input,select,textarea{font-family:inherit;}

/* App Shell */
.app-shell{position:relative;min-height:100vh;}
.sidebar{
  position:fixed;inset:0 auto 0 0;
  width:272px;background:#0A0E12;
  border-right:1px solid var(--line);
  z-index:80;
  display:flex;flex-direction:column;
  padding:26px 16px 20px;
  transition:transform .3s ease;
}
.sidebar-brand{display:flex;align-items:center;gap:12px;padding:0 10px 20px;border-bottom:1px solid var(--line);}
.brand-logo{
  width:42px;height:42px;min-width:42px;flex-basis:42px;
  border-radius:14px;
  background:linear-gradient(135deg,var(--brand) 0%,var(--brand-dark) 100%);
  display:grid;place-items:center;color:#04120D;font-size:20px;
  box-shadow:0 0 20px rgba(55,242,181,.22);
}
.brand-text{display:flex;flex-direction:column;line-height:1.3;}
.brand-text strong{font-size:1.04rem;font-weight:800;letter-spacing:.02em;color:#fff;}
.brand-text small{font-size:.68rem;color:var(--dim);letter-spacing:.18em;}
.sidebar-scroll{flex:1;overflow-y:auto;padding-top:16px;scrollbar-width:none;}
.sidebar-scroll::-webkit-scrollbar{display:none;}
.nav-group{font-size:.72rem;letter-spacing:.2em;color:var(--dim);padding:8px 12px 8px;}
.sidebar-nav{display:flex;flex-direction:column;gap:5px;}
.nav-link{
  display:flex;align-items:center;gap:13px;
  padding:0 16px;height:48px;border-radius:12px;
  color:var(--muted);font-weight:600;font-size:.92rem;
  border-left:3px solid transparent;
  transition:all .2s ease;position:relative;
}
.nav-link i{width:20px;text-align:center;font-size:15px;color:var(--dim);transition:color .2s;}
.nav-link:hover{background:rgba(255,255,255,.06);color:var(--text);}
.nav-link:hover i{color:var(--brand);}
.nav-link.active{
  background:rgba(55,242,181,.08);
  border-left-color:var(--brand);
  color:var(--brand);
}
.nav-link.active i{color:var(--brand);}
.sidebar-status{
  margin-top:18px;padding:14px 12px;border:1px solid var(--line);
  border-radius:14px;background:rgba(255,255,255,.03);
  display:flex;align-items:center;gap:10px;
}
.status-dot{width:9px;height:9px;border-radius:50%;background:var(--brand);box-shadow:0 0 8px var(--brand);}
.sidebar-status b{display:block;font-size:.8rem;color:var(--text);}
.sidebar-status span{font-size:.7rem;color:var(--dim);}

.main-wrap{margin-left:272px;min-height:100vh;display:flex;flex-direction:column;}
.main-content{flex:1;}
.container{max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px;}

/* mobile top */
.topbar{
  position:fixed;top:0;left:0;right:0;height:64px;
  background:rgba(10,14,18,.92);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
  display:none;align-items:center;justify-content:space-between;
  padding:0 16px;z-index:90;
}
.menu-toggle{
  width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.04);color:var(--text);font-size:1.15rem;
  display:grid;place-items:center;transition:all .2s;
}
.menu-toggle:hover{border-color:var(--brand);color:var(--brand);}
.body-overlay{
  position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:70;
  opacity:0;visibility:hidden;transition:all .3s;
}
body.nav-open .sidebar{transform:translateX(0);}
body.nav-open .body-overlay{opacity:1;visibility:visible;}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 26px;border-radius:999px;
  font-weight:700;font-size:.9rem;border:1px solid transparent;
  line-height:1;transition:all .2s;min-width:128px;
}
.btn i{font-size:.9rem;}
.btn:active{transform:scale(.98);}
.btn:focus-visible,.nav-link:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:3px;}
.btn-primary{background:var(--brand);color:#03120C;}
.btn-primary:hover{filter:brightness(1.08);box-shadow:0 0 24px rgba(55,242,181,.35);}
.btn-secondary{background:rgba(255,255,255,.05);color:var(--text);border-color:rgba(255,255,255,.18);}
.btn-secondary:hover{border-color:var(--amber);color:var(--amber);background:rgba(255,177,61,.06);}
.btn-dark{background:var(--card);border-color:var(--line);color:var(--text);}
.btn-dark:hover{border-color:var(--brand);color:var(--brand);}
.btn-block{width:100%;}

/* Hero */
.page-hero{
  position:relative;overflow:hidden;
  min-height:520px;display:flex;align-items:center;
  padding:clamp(60px,8vw,100px) 0;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background:url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  opacity:.3;z-index:0;
}
.page-hero::after{
  content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(90deg,#080C10 20%,rgba(8,12,16,.75) 55%,rgba(8,12,16,.35));
}
.page-hero .container{position:relative;z-index:3;}
.crumb{
  display:flex;align-items:center;gap:9px;font-size:.8rem;color:var(--muted);
  margin-bottom:26px;flex-wrap:wrap;
}
.crumb a{transition:color .2s;color:var(--muted);}
.crumb a:hover{color:var(--brand);}
.crumb i{font-size:.65rem;color:var(--dim);}
.crumb .now{color:var(--brand);}
h1.page-h1{
  font-size:clamp(1.8rem,4.2vw,3.2rem);font-weight:900;
  line-height:1.18;letter-spacing:.01em;max-width:820px;
  color:#fff;margin-bottom:20px;
}
.h1-accent{color:var(--brand);}
.hero-lead{
  font-size:clamp(.95rem,1.3vw,1.05rem);color:var(--muted);
  max-width:640px;line-height:1.9;margin-bottom:30px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;}
.hero-tagline{
  display:flex;align-items:center;gap:8px;margin-top:26px;
  color:var(--dim);font-size:.83rem;
}
.hero-tagline i{color:var(--brand);}

/* section */
.section{padding:clamp(56px,8vw,96px) 0;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:36px;flex-wrap:wrap;}
.section-head .eyebrow{color:var(--brand);font-size:.75rem;letter-spacing:.2em;font-weight:700;margin-bottom:8px;}
.section-head h2{font-size:clamp(1.4rem,2.4vw,2rem);font-weight:800;line-height:1.3;}
.section-sub{color:var(--muted);font-size:.9rem;max-width:640px;line-height:1.8;}

/* status strip */
.status-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:-42px;position:relative;z-index:8;}
.status-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;transition:all .2s;position:relative;overflow:hidden;
}
.status-card:hover{transform:translateY(-4px);border-color:rgba(55,242,181,.4);box-shadow:var(--shadow-hover);}
.status-card .num{font-size:1rem;width:34px;height:34px;border-radius:10px;background:rgba(55,242,181,.1);color:var(--brand);display:grid;place-items:center;font-weight:800;margin-bottom:12px;}
.status-card h3{font-size:.98rem;color:var(--text);font-weight:700;line-height:1.4;margin-bottom:7px;}
.status-card p{font-size:.82rem;color:var(--muted);line-height:1.6;}
.line-rule{height:1px;background:var(--line);border:0;margin:22px 0 0;}

/* article-like terms */
.terms-lead{
  display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center;
  border:1px solid var(--line);border-radius:var(--radius-lg);
  background:linear-gradient(135deg,#10161D 0%,#151D25 100%);
  padding:clamp(20px,4vw,42px);overflow:hidden;
}
.terms-copy h2{font-size:clamp(1.3rem,2.2vw,1.8rem);margin-bottom:14px;font-weight:800;}
.terms-copy p{color:var(--muted);line-height:1.9;font-size:.94rem;margin-bottom:14px;}
.terms-copy p:last-child{margin-bottom:0;}
.terms-visual{border-radius:18px;overflow:hidden;position:relative;}
.terms-visual img{width:100%;height:100%;object-fit:cover;min-height:220px;}
.terms-visual span{
  position:absolute;left:14px;bottom:14px;background:rgba(8,12,16,.75);color:var(--brand);
  padding:8px 14px;font-size:.78rem;border-radius:999px;border:1px solid rgba(55,242,181,.3);
  backdrop-filter:blur(6px);
}

/* accordion columns */
.accordion-panel{
  display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start;
}
.accordion-col{display:flex;flex-direction:column;gap:14px;}
details.term-item{
  border:1px solid var(--line);border-radius:16px;background:var(--panel);
  overflow:hidden;transition:border-color .25s,box-shadow .25s;
}
details.term-item[open]{border-color:rgba(55,242,181,.45);box-shadow:0 14px 34px rgba(0,0,0,.28);}
.term-item summary{
  list-style:none;display:flex;align-items:center;gap:12px;
  padding:18px 20px;min-height:58px;cursor:pointer;
  font-weight:700;color:var(--text);font-size:.96rem;
  position:relative;transition:background .2s;
}
.term-item summary::-webkit-details-marker{display:none;}
.term-item summary:hover{background:rgba(255,255,255,.03);}
.term-item summary .mark{
  width:32px;height:32px;border-radius:10px;min-width:32px;
  background:rgba(255,177,61,.1);color:var(--amber);
  display:grid;place-items:center;font-size:.82rem;
}
.term-item summary .chev{
  margin-left:auto;width:30px;height:30px;border-radius:50%;
  border:1px solid var(--line);display:grid;place-items:center;
  color:var(--muted);transition:transform .3s;font-size:.75rem;background:transparent;
}
details.term-item[open] summary .chev{transform:rotate(45deg);color:var(--brand);border-color:rgba(55,242,181,.5);}
.term-body{padding:0 20px 20px 64px;color:var(--muted);font-size:.89rem;line-height:1.85;}
.term-body p{margin-bottom:10px;}
.term-body ul{display:flex;flex-direction:column;gap:8px;margin:10px 0;}
.term-body li{position:relative;padding-left:16px;}
.term-body li::before{content:"·";color:var(--brand);position:absolute;left:2px;font-weight:700;}
.term-body small{color:var(--dim);}

/* scenario table */
.scenario-wrap{border:1px solid var(--line);border-radius:var(--radius-lg);background:var(--panel);overflow:hidden;}
.scenario-row{
  display:grid;grid-template-columns:120px 1fr 1fr;gap:22px;
  padding:22px 26px;border-bottom:1px solid var(--line);
  align-items:center;transition:background .2s;
}
.scenario-row:last-child{border-bottom:0;}
.scenario-row:hover{background:rgba(55,242,181,.04);}
.scenario-icon{
  width:72px;height:72px;border-radius:16px;background:rgba(55,242,181,.08);
  border:1px solid rgba(55,242,181,.16);color:var(--brand);
  display:grid;place-items:center;font-size:23px;
}
.scenario-row h3{font-size:.94rem;font-weight:700;color:var(--text);margin-bottom:4px;}
.scenario-row p{color:var(--muted);font-size:.82rem;line-height:1.7;}
.scenario-tag{justify-self:start;}

/* steps */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step;}
.step-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 20px 22px;position:relative;transition:all .25s;
}
.step-item:hover{transform:translateY(-6px);border-color:rgba(55,242,181,.35);box-shadow:var(--shadow-hover);}
.step-item .step-no{
  width:36px;height:36px;border-radius:12px;
  background:var(--brand);color:#03120C;font-weight:900;
  display:grid;place-items:center;font-size:1rem;margin-bottom:18px;
}
.step-item h3{font-size:.97rem;color:#fff;font-weight:700;margin-bottom:8px;}
.step-item p{font-size:.83rem;color:var(--muted);line-height:1.7;}

/* FAQ */
.faq-zone{background:rgba(255,255,255,.018);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.faq-cols{display:grid;grid-template-columns:1fr 1fr;gap:14px 26px;align-items:start;}
details.faq-card{background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden;transition:border .25s;}
details.faq-card[open]{border-color:rgba(55,242,181,.4);}
.faq-card summary{list-style:none;cursor:pointer;padding:16px 20px;display:flex;gap:12px;align-items:center;font-size:.92rem;font-weight:700;color:var(--text);line-height:1.55;}
.faq-card summary::-webkit-details-marker{display:none;}
.faq-card summary .plus{margin-left:auto;width:28px;height:28px;min-width:28px;border-radius:50%;border:1px dashed rgba(55,242,181,.5);display:grid;place-items:center;color:var(--brand);font-size:.78rem;transition:all .25s;}
details.faq-card[open] summary .plus{transform:rotate(45deg);border-style:solid;background:rgba(55,242,181,.1);}
.faq-card .faq-body{padding:0 20px 18px 52px;font-size:.86rem;color:var(--muted);line-height:1.85;}
.faq-card .faq-body p{margin-bottom:8px;}

/* CTA */
.cta-section{padding:clamp(48px,6vw,78px) 0;}
.cta-banner{
  position:relative;border-radius:26px;overflow:hidden;
  background:linear-gradient(100deg,#08271E 0%,#0E3A2C 45%,#182B2A 100%);
  border:1px solid rgba(55,242,181,.2);
  padding:clamp(28px,5vw,64px);
  display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;
}
.cta-banner::before{
  content:"";position:absolute;right:-100px;top:-160px;width:360px;height:360px;
  background:radial-gradient(circle,rgba(55,242,181,.2),transparent 68%);
}
.cta-content{position:relative;z-index:2;max-width:640px;}
.cta-content .cta-label{color:var(--amber);font-size:.75rem;letter-spacing:.2em;font-weight:700;display:flex;align-items:center;gap:9px;}
.cta-content h2{font-size:clamp(1.3rem,2.4vw,1.9rem);color:#fff;font-weight:800;margin:12px 0 10px;}
.cta-content p{color:rgba(234,242,248,.72);font-size:.9rem;line-height:1.8;}
.cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:13px;}

/* footer */
.site-footer{
  background:#0A0E12;border-top:2px solid rgba(55,242,181,.28);
  padding:clamp(44px,5vw,68px) 0 30px;margin-top:auto;
}
.footer-brand-row{
  display:flex;align-items:flex-start;justify-content:space-between;
  gap:24px;padding-bottom:26px;border-bottom:1px solid var(--line);flex-wrap:wrap;
}
.footer-brand{display:flex;align-items:center;gap:12px;}
.footer-desc{max-width:420px;color:var(--muted);font-size:.85rem;line-height:1.8;}
.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;padding:28px 0 8px;}
.footer-logo-mark{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.footer-logo-mark strong{color:#fff;font-size:.95rem;}
.footer-col h4{color:var(--text);font-size:.9rem;margin-bottom:13px;font-weight:700;}
.footer-col ul li{margin-bottom:9px;}
.footer-col ul a{color:var(--muted);font-size:.84rem;transition:color .2s,padding-left .2s;}
.footer-col ul a:hover{color:var(--brand);padding-left:4px;}
.footer-bottom{
  display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.05);padding-top:20px;
  color:var(--dim);font-size:.74rem;
}

/* responsive */
@media screen and (max-width:1024px){
  .sidebar{transform:translateX(-110%);top:0;bottom:0;box-shadow:20px 0 60px rgba(0,0,0,.4);}
  .topbar{display:flex;}
  .main-wrap{margin-left:0;}
  .main-content{padding-top:64px;}
  .status-strip{grid-template-columns:repeat(2,1fr);margin-top:0;}
  .page-hero{min-height:520px;padding-top:70px;}
  .accordion-panel,.faq-cols{grid-template-columns:1fr;}
  .steps-grid{grid-template-columns:repeat(2,1fr);}
}
@media screen and (max-width:640px){
  .hero-actions .btn{width:100%;}
  .terms-lead{grid-template-columns:1fr;}
  .status-strip{grid-template-columns:1fr;}
  .steps-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .scenario-row{grid-template-columns:86px 1fr;}
  .scenario-tag{grid-column:2;}
  .term-body{padding:0 18px 18px 18px;}
  .container{padding-left:16px;padding-right:16px;}
  h1.page-h1{font-size:2rem;}
}
@media screen and (max-width:480px){
  .topbar .brand-text small{display:none;}
  .footer-grid{grid-template-columns:1fr;}
}

/* roulang page: category2 */
:root {
      --bg: #080C10;
      --panel: #10161D;
      --card: #151D25;
      --line: rgba(255, 255, 255, 0.08);
      --brand: #37F2B5;
      --brand-dark: #0B9F77;
      --amber: #FFB13D;
      --coral: #FF5C7A;
      --text: #EAF2F8;
      --muted: #8B9DB0;
      --dim: #5D6F82;
      --radius-xl: 24px;
      --radius-lg: 16px;
      --radius-sm: 12px;
      --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
      --shadow-hover: 0 18px 40px rgba(0, 0, 0, 0.35);
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      margin: 0;
      font-family: "PingFang SC", "Source Han Sans SC", "Microsoft YaHei", "Hiragino Sans GB", Arial, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 0.9375rem;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color 0.2s ease;
    }

    a:hover {
      color: var(--brand);
    }

    img {
      display: block;
      max-width: 100%;
    }

    button,
    input,
    summary {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1260px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .layout-shell {
      display: flex;
      min-height: 100vh;
    }

    .sidebar {
      position: fixed;
      inset: 0 auto 0 0;
      width: 256px;
      background: #0A0E12;
      border-right: 1px solid var(--line);
      z-index: 80;
      display: flex;
      flex-direction: column;
      background-image: linear-gradient(220deg, rgba(55, 242, 181, 0.06) 0%, transparent 32%);
      transition: transform 0.3s ease;
    }

    .sidebar-brand {
      display: flex;
      align-items: center;
      height: 80px;
      padding: 0 18px;
      border-bottom: 1px solid var(--line);
      flex-shrink: 0;
    }

    .brand-link {
      display: inline-flex;
      align-items: center;
      gap: 11px;
      color: #fff;
      font-weight: 900;
      font-size: 1.04rem;
      letter-spacing: 0.02em;
      min-width: 0;
    }

    .brand-logo {
      flex: 0 0 40px;
      width: 40px;
      height: 40px;
      border-radius: 12px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #0B1713;
      background: linear-gradient(135deg, var(--brand), var(--brand-dark));
      font-size: 17px;
      box-shadow: 0 0 22px rgba(55, 242, 181, 0.18);
    }

    .sidebar-nav {
      padding: 18px 12px 12px;
      flex: 1;
    }

    .nav-group {
      font-size: 0.66rem;
      font-weight: 800;
      letter-spacing: 0.18em;
      text-transform: uppercase;
      color: var(--dim);
      padding: 0 14px 10px;
    }

    .nav-link {
      display: flex;
      align-items: center;
      gap: 13px;
      height: 48px;
      margin-bottom: 5px;
      padding: 0 20px;
      border-radius: 12px;
      border-left: 3px solid transparent;
      color: var(--muted);
      font-weight: 600;
      font-size: 0.9rem;
      transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
    }

    .nav-link i {
      width: 18px;
      text-align: center;
      font-size: 0.94rem;
    }

    .nav-link:hover {
      background: rgba(255, 255, 255, 0.06);
      color: #fff;
    }

    .nav-link:focus-visible {
      outline: 2px solid rgba(55, 242, 181, 0.7);
      outline-offset: -2px;
    }

    .nav-link.active {
      background: rgba(55, 242, 181, 0.09);
      border-left-color: var(--brand);
      color: var(--brand);
    }

    .sidebar-status {
      margin: 10px 14px 18px;
      padding: 15px;
      border: 1px solid rgba(255, 255, 255, 0.07);
      background: rgba(255, 255, 255, 0.025);
      border-radius: 16px;
    }

    .sidebar-status .status-label {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--muted);
      font-size: 0.78rem;
      font-weight: 700;
    }

    .status-dot {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--brand);
      box-shadow: 0 0 12px rgba(55, 242, 181, 0.55);
      flex-shrink: 0;
    }

    .sidebar-status p {
      margin-top: 10px;
      color: var(--dim);
      font-size: 0.72rem;
      line-height: 1.5;
    }

    .mobile-topbar {
      display: none;
      position: sticky;
      top: 0;
      z-index: 70;
      height: 64px;
      padding: 0 16px;
      align-items: center;
      justify-content: space-between;
      background: rgba(10, 14, 18, 0.92);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .mobile-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      color: #fff;
      font-weight: 900;
      font-size: 1rem;
    }

    .mobile-nav-toggle {
      width: 42px;
      height: 42px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--line);
      border-radius: 12px;
      color: var(--text);
      font-size: 1.05rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background 0.2s ease, transform 0.2s ease;
    }

    .mobile-nav-toggle:hover {
      background: rgba(55, 242, 181, 0.12);
    }

    .mobile-nav-toggle:active {
      transform: scale(0.96);
    }

    .nav-overlay {
      position: fixed;
      inset: 0;
      background: rgba(0, 0, 0, 0.6);
      z-index: 75;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }

    .nav-overlay.show {
      opacity: 1;
      pointer-events: auto;
    }

    .main-content {
      width: calc(100% - 256px);
      margin-left: 256px;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    .page-main {
      flex: 1;
    }

    .page-container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 36px 28px 24px;
    }

    .page-hero {
      display: grid;
      grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
      gap: 36px;
      align-items: center;
      border-radius: var(--radius-xl);
      border: 1px solid rgba(255, 255, 255, 0.09);
      background:
        linear-gradient(115deg, rgba(8, 12, 16, 0.98), rgba(8, 12, 16, 0.64)),
        url('/assets/images/backpic/back-1.webp') no-repeat center / cover;
      padding: clamp(30px, 4vw, 48px);
      min-height: 450px;
      position: relative;
    }

    .hero-copy {
      min-width: 0;
    }

    .crumbs {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      color: var(--muted);
      font-size: 0.8rem;
      margin-bottom: 18px;
    }

    .crumbs a {
      transition: color 0.2s ease;
    }

    .crumbs a:hover {
      color: var(--brand);
    }

    .crumbs span {
      color: var(--dim);
    }

    .crumbs .current {
      color: var(--brand);
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.72rem;
      font-weight: 800;
      letter-spacing: 0.16em;
      text-transform: uppercase;
      color: var(--brand);
      border: 1px solid rgba(55, 242, 181, 0.22);
      background: rgba(55, 242, 181, 0.06);
      border-radius: 999px;
      padding: 5px 12px;
      margin-bottom: 16px;
    }

    .hero-copy h1 {
      font-size: clamp(1.9rem, 4vw, 3.1rem);
      font-weight: 900;
      line-height: 1.18;
      margin: 0 0 18px;
      color: #fff;
      max-width: 620px;
    }

    .hero-copy h1 .h1-muted {
      color: var(--brand);
    }

    .hero-copy .hero-sub {
      font-size: 1rem;
      color: #C3D0DB;
      max-width: 520px;
      margin-bottom: 24px;
      line-height: 1.8;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 22px;
    }

    .btn-primary,
    .btn-ghost,
    .btn-amber,
    .btn-dark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      height: 48px;
      min-width: 140px;
      padding: 0 22px;
      border-radius: 999px;
      font-weight: 800;
      font-size: 0.88rem;
      border: 1px solid transparent;
      transition: filter 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, transform 0.15s ease, border-color 0.2s ease;
    }

    .btn-primary:active,
    .btn-ghost:active,
    .btn-amber:active,
    .btn-dark:active {
      transform: scale(0.98);
    }

    .btn-primary {
      background: var(--brand);
      color: #09120F;
      box-shadow: 0 0 18px rgba(55, 242, 181, 0.25);
    }

    .btn-primary:hover {
      background: #5ff5c5;
      box-shadow: 0 0 26px rgba(55, 242, 181, 0.42);
      color: #09120F;
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.04);
      border-color: rgba(255, 255, 255, 0.16);
      color: #E3EAF0;
    }

    .btn-ghost:hover {
      border-color: rgba(255, 177, 61, 0.6);
      color: var(--amber);
      background: rgba(255, 177, 61, 0.06);
    }

    .btn-amber {
      background: var(--amber);
      color: #1C1306;
      box-shadow: 0 0 18px rgba(255, 177, 61, 0.2);
    }

    .btn-amber:hover {
      filter: brightness(1.08);
      color: #1C1306;
      box-shadow: 0 0 26px rgba(255, 177, 61, 0.36);
    }

    .btn-dark {
      background: rgba(255, 255, 255, 0.07);
      color: var(--text);
      border-color: var(--line);
    }

    .btn-dark:hover {
      border-color: var(--brand);
      color: var(--brand);
    }

    .hero-trust {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
      color: var(--muted);
      font-size: 0.78rem;
      font-weight: 600;
    }

    .hero-trust span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .hero-trust i {
      color: var(--brand);
      font-size: 0.8rem;
    }

    .hero-art {
      position: relative;
      display: flex;
      justify-content: center;
      align-items: center;
      min-width: 0;
    }

    .art-frame {
      width: min(320px, 100%);
      aspect-ratio: 4 / 4.7;
      border-radius: 24px;
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.14);
      background: var(--panel);
      box-shadow: var(--shadow-hover);
      transform: rotate(1.6deg);
    }

    .art-frame img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .art-float-card {
      position: absolute;
      right: 2%;
      bottom: 18px;
      backdrop-filter: blur(12px);
      background: rgba(16, 22, 29, 0.82);
      border: 1px solid rgba(55, 242, 181, 0.35);
      box-shadow: 0 12px 30px rgba(0, 0, 0, 0.34);
      border-radius: 16px;
      padding: 11px 16px;
      font-size: 0.78rem;
      display: flex;
      align-items: center;
      gap: 9px;
      color: var(--text);
      font-weight: 700;
      max-width: 220px;
    }

    .art-float-card i {
      color: var(--brand);
      font-size: 1rem;
    }

    .section-block {
      padding: clamp(58px, 8vw, 96px) 0;
      border-bottom: 1px solid var(--line);
    }

    .section-head {
      margin-bottom: 32px;
      max-width: 800px;
    }

    .section-head h2 {
      font-size: clamp(1.4rem, 2.4vw, 2.05rem);
      font-weight: 800;
      line-height: 1.3;
      margin: 6px 0 10px;
      color: #fff;
    }

    .section-head .section-intro {
      color: var(--muted);
      font-size: 0.94rem;
      line-height: 1.8;
    }

    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .section-label {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      color: var(--brand);
      font-weight: 800;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      font-size: 0.72rem;
    }

    .section-label::before {
      content: '';
      width: 16px;
      height: 2px;
      background: var(--brand);
      border-radius: 2px;
    }

    .keypoints-wrap {
      border-top: 1px solid var(--line);
    }

    .keypoint-row {
      display: grid;
      grid-template-columns: 72px minmax(150px, 0.6fr) 2.2fr;
      align-items: baseline;
      gap: 18px;
      padding: 26px 4px;
      border-bottom: 1px solid var(--line);
      transition: background 0.2s ease, transform 0.2s ease;
    }

    .keypoint-row:hover {
      background: rgba(255, 255, 255, 0.018);
      transform: translateX(4px);
    }

    .keypoint-row .kp-num {
      font-weight: 900;
      font-size: 1.45rem;
      color: var(--amber);
      letter-spacing: -0.02em;
      line-height: 1.2;
      font-family: "Barlow Condensed", "Arial", sans-serif;
    }

    .keypoint-row .kp-title {
      font-weight: 800;
      font-size: 1.05rem;
      color: #F0F5FA;
    }

    .keypoint-row .kp-desc {
      color: var(--muted);
      font-size: 0.92rem;
      line-height: 1.85;
    }

    .secure-timeline {
      position: relative;
      max-width: 1020px;
      margin: 36px auto 0;
      padding: 0 0 8px;
    }

    .secure-timeline::before {
      content: '';
      position: absolute;
      left: 7px;
      top: 12px;
      bottom: 14px;
      width: 2px;
      background: linear-gradient(180deg, rgba(55, 242, 181, 0.72), rgba(55, 242, 181, 0.1));
    }

    .timeline-item {
      position: relative;
      padding: 0 0 42px 54px;
    }

    .timeline-item:last-child {
      padding-bottom: 0;
    }

    .timeline-marker {
      position: absolute;
      left: 0;
      top: 8px;
      width: 17px;
      height: 17px;
      background: var(--bg);
      border: 4px solid var(--brand);
      border-radius: 50%;
      box-shadow: 0 0 0 6px rgba(55, 242, 181, 0.08);
    }

    .step-body {
      background: rgba(255, 255, 255, 0.022);
      border: 1px solid var(--line);
      border-left: 2px solid rgba(55, 242, 181, 0.55);
      border-radius: 16px;
      padding: 24px 26px 20px;
    }

    .step-top-row {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 9px;
    }

    .step-index {
      font-family: "Barlow Condensed", Arial, sans-serif;
      font-weight: 900;
      font-size: 0.92rem;
      letter-spacing: 0.08em;
      color: #081D17;
      background: linear-gradient(135deg, var(--brand), #65f7c3);
      height: 28px;
      padding: 0 13px;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      line-height: 1;
    }

    .step-pager {
      font-size: 0.78rem;
      color: var(--dim);
      letter-spacing: 0.04em;
      font-weight: 700;
    }

    .step-body h3 {
      font-size: 1.28rem;
      font-weight: 800;
      color: #fff;
      margin-bottom: 8px;
      letter-spacing: 0.01em;
    }

    .step-body p {
      color: var(--muted);
      font-size: 0.92rem;
      line-height: 1.9;
      max-width: 720px;
      margin-bottom: 12px;
    }

    .step-meta {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 0.78rem;
      color: var(--dim);
      border-top: 1px dashed rgba(255, 255, 255, 0.08);
      padding-top: 12px;
    }

    .step-meta i {
      color: var(--amber);
      margin-right: 6px;
    }

    .step-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      height: 24px;
      padding: 0 10px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 999px;
      color: var(--muted);
      font-size: 0.73rem;
      font-weight: 600;
      line-height: 1;
    }

    .tag.brand {
      color: var(--brand);
      border-color: rgba(55, 242, 181, 0.3);
      background: rgba(55, 242, 181, 0.06);
    }

    .lookup-panel {
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: rgba(255, 255, 255, 0.02);
      overflow: hidden;
    }

    .lookup-head {
      display: grid;
      grid-template-columns: 1fr 48px 1fr;
      gap: 10px;
      align-items: center;
      padding: 0 4px;
      height: 52px;
      border-bottom: 1px solid var(--line);
      background: rgba(255, 255, 255, 0.03);
      color: var(--dim);
      font-size: 0.75rem;
      font-weight: 800;
      letter-spacing: 0.1em;
      text-transform: uppercase;
    }

    .lookup-head span:first-child {
      padding-left: 24px;
    }

    .lookup-head span:last-child {
      padding-right: 24px;
      text-align: right;
    }

    .lookup-row {
      display: grid;
      grid-template-columns: 1fr 48px 1fr;
      gap: 10px;
      align-items: center;
      min-height: 68px;
      padding: 0 4px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.055);
      background: transparent;
      transition: background 0.2s ease;
    }

    .lookup-row:last-child {
      border-bottom: none;
    }

    .lookup-row:hover {
      background: rgba(55, 242, 181, 0.035);
    }

    .lookup-row .lookup-name {
      padding-left: 24px;
      font-weight: 800;
      color: #EDF2F7;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .lookup-name i {
      color: var(--amber);
      width: 18px;
      font-size: 0.9rem;
    }

    .lookup-arrow {
      text-align: center;
      color: var(--dim);
      font-size: 0.9rem;
    }

    .lookup-row .lookup-path {
      padding-right: 24px;
      text-align: right;
      color: var(--muted);
      font-size: 0.86rem;
      font-weight: 600;
    }

    .scene-grid {
      border-top: 1px solid var(--line);
    }

    .scene-row {
      display: grid;
      grid-template-columns: 130px minmax(0, 1fr) auto;
      gap: 24px;
      align-items: center;
      padding: 22px 4px;
      border-bottom: 1px solid var(--line);
      transition: background 0.2s ease, transform 0.2s ease;
    }

    .scene-row:hover {
      background: rgba(255, 255, 255, 0.018);
      transform: translateX(3px);
    }

    .scene-tag {
      font-weight: 800;
      color: #E7EEF4;
      display: flex;
      align-items: center;
      gap: 9px;
      font-size: 0.96rem;
    }

    .scene-tag i {
      color: var(--brand);
      width: 20px;
      text-align: center;
    }

    .scene-tip {
      color: var(--muted);
      font-size: 0.9rem;
      line-height: 1.8;
    }

    .scene-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      height: 30px;
      padding: 0 13px;
      border-radius: 999px;
      border: 1px solid rgba(255, 177, 61, 0.28);
      background: rgba(255, 177, 61, 0.07);
      color: var(--amber);
      font-size: 0.77rem;
      font-weight: 800;
      white-space: nowrap;
    }

    .faq-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
      align-items: start;
    }

    .faq-item {
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .faq-item:hover {
      border-color: rgba(55, 242, 181, 0.28);
    }

    .faq-item summary {
      display: flex;
      align-items: center;
      gap: 14px;
      min-height: 52px;
      padding: 12px 18px;
      font-weight: 800;
      font-size: 0.92rem;
      color: #F0F5FA;
      list-style: none;
      cursor: pointer;
      user-select: none;
      transition: color 0.2s ease;
    }

    .faq-item summary::-webkit-details-marker {
      display: none;
    }

    .faq-item summary::before {
      content: '\f067';
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      color: var(--dim);
      font-size: 0.75rem;
      transition: transform 0.25s ease, color 0.2s ease;
    }

    .faq-item[open] summary::before {
      transform: rotate(45deg);
      color: var(--brand);
    }

    .faq-item[open] summary {
      color: var(--brand);
    }

    .faq-answer {
      padding: 0 20px 18px 42px;
      color: var(--muted);
      font-size: 0.88rem;
      line-height: 1.85;
    }

    .cta-banner {
      border-radius: var(--radius-xl);
      padding: clamp(30px, 5vw, 52px);
      background:
        linear-gradient(110deg, rgba(7, 11, 14, 0.92), rgba(10, 15, 20, 0.75)),
        url('/assets/images/backpic/back-2.webp') no-repeat center / cover;
      border: 1px solid rgba(55, 242, 181, 0.18);
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 30px;
      align-items: center;
    }

    .cta-banner h2 {
      font-size: clamp(1.45rem, 2.6vw, 2.1rem);
      font-weight: 900;
      margin-bottom: 8px;
      color: #fff;
    }

    .cta-banner p {
      color: var(--muted);
      font-size: 0.94rem;
      max-width: 590px;
      margin-bottom: 0;
    }

    .cta-banner .cta-sub-brand {
      color: var(--brand);
    }

    .cta-actions {
      display: flex;
      flex-direction: column;
      gap: 12px;
      align-items: stretch;
      justify-content: center;
    }

    .site-footer {
      background: var(--panel);
      border-top: 1px solid rgba(55, 242, 181, 0.14);
      padding: 52px 0 24px;
    }

    .footer-brand-row {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 20px;
      align-items: center;
      margin-bottom: 34px;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .footer-desc {
      color: var(--muted);
      font-size: 0.85rem;
      max-width: 530px;
      line-height: 1.8;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 26px;
      padding: 24px 0 30px;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .footer-logo-mark {
      display: flex;
      align-items: center;
      gap: 9px;
      color: #fff;
      margin-bottom: 12px;
      font-weight: 800;
      font-size: 0.94rem;
    }

    .footer-col h4 {
      color: #E3EBF1;
      font-size: 0.86rem;
      font-weight: 800;
      margin-bottom: 12px;
      letter-spacing: 0.04em;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col li {
      margin-bottom: 8px;
    }

    .footer-col a {
      color: var(--muted);
      font-size: 0.82rem;
      transition: color 0.2s ease, padding-left 0.2s ease;
    }

    .footer-col a:hover {
      color: var(--brand);
      padding-left: 3px;
    }

    .footer-bottom {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 10px;
      padding-top: 18px;
      color: var(--dim);
      font-size: 0.76rem;
    }

    @media (min-width: 1024px) {
      .sidebar {
        transform: translateX(0) !important;
      }

      .sidebar.open {
        transform: none;
      }
    }

    @media (max-width: 1023.98px) {
      .sidebar {
        transform: translateX(-110%);
        box-shadow: 20px 0 50px rgba(0, 0, 0, 0.4);
      }

      .sidebar.open {
        transform: translateX(0);
      }

      .mobile-topbar {
        display: flex;
      }

      .main-content {
        width: 100%;
        margin-left: 0;
      }

      .page-container {
        padding-top: 26px;
      }

      .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .cta-banner {
        grid-template-columns: 1fr;
      }

      .cta-actions {
        flex-direction: row;
        align-items: center;
      }

      .cta-actions .btn-primary,
      .cta-actions .btn-dark {
        min-width: 0;
      }
    }

    @media (max-width: 767.98px) {
      .page-hero {
        grid-template-columns: 1fr;
        padding: 26px 20px;
        gap: 28px;
        min-height: 0;
      }

      .hero-art {
        max-width: 320px;
        margin: 0 auto;
        width: 100%;
      }

      .art-frame {
        transform: none;
      }

      .keypoint-row {
        grid-template-columns: 52px 1fr;
        row-gap: 6px;
      }

      .keypoint-row .kp-desc {
        grid-column: 1 / -1;
      }

      .scene-row {
        grid-template-columns: 1fr;
        gap: 8px;
        padding: 20px 2px;
      }

      .scene-action {
        justify-self: start;
        margin-top: 4px;
      }

      .lookup-head,
      .lookup-row {
        grid-template-columns: 1fr 34px 1fr;
      }

      .lookup-name {
        padding-left: 14px !important;
      }

      .lookup-path {
        padding-right: 14px !important;
      }

      .faq-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .footer-bottom {
        flex-direction: column;
        gap: 6px;
      }
    }

    @media (max-width: 639.98px) {
      .page-container {
        padding-left: 16px;
        padding-right: 16px;
      }

      .hero-actions {
        flex-direction: column;
        width: 100%;
      }

      .hero-actions .btn-primary,
      .hero-actions .btn-ghost {
        width: 100%;
      }

      .lookup-head,
      .lookup-row {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        padding: 14px;
      }

      .lookup-head span:first-child,
      .lookup-head span:last-child,
      .lookup-row .lookup-name,
      .lookup-row .lookup-path {
        padding: 0 !important;
        text-align: left;
      }

      .lookup-row .lookup-path {
        font-size: 0.82rem;
      }

      .lookup-arrow {
        display: none;
      }

      .timeline-item {
        padding-left: 40px;
      }

      .step-body {
        padding: 18px;
      }

      .section-head h2 {
        font-size: 1.4rem;
      }
    }

/* roulang page: category4 */
:root {
            --bg: #080C10;
            --panel: #10161D;
            --card: #151D25;
            --line: rgba(255, 255, 255, 0.08);
            --primary: #37F2B5;
            --primary-deep: #0B9F77;
            --accent: #FFB13D;
            --danger: #FF5C7A;
            --text: #EAF2F8;
            --muted: #8B9DB0;
            --dim: #5D6F82;
            --radius: 16px;
            --r-sm: 12px;
            --r-lg: 24px;
            --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
            --shadow-up: 0 18px 40px rgba(0, 0, 0, 0.35);
            --container: 1200px;
            --sidebar-w: 256px;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--bg);
            color: var(--text);
            font-family: "PingFang SC", "Source Han Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
            font-size: 0.9375rem;
            line-height: 1.85;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .app-shell {
            min-height: 100vh;
        }

        .main-area {
            margin-left: var(--sidebar-w);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-area main {
            flex: 1;
        }

        /* ===== Sidebar ===== */
        .sidebar {
            position: fixed;
            inset: 0 auto 0 0;
            width: var(--sidebar-w);
            background: #0A0E12;
            border-right: 1px solid var(--line);
            padding: 24px 16px;
            display: flex;
            flex-direction: column;
            z-index: 100;
        }

        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 4px 10px 22px;
        }

        .brand-logo {
            width: 42px;
            height: 42px;
            flex: 0 0 42px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--primary), var(--primary-deep));
            color: #07110D;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            box-shadow: 0 0 20px rgba(55, 242, 181, 0.28);
        }

        .brand-text strong {
            display: block;
            color: #fff;
            font-size: 1rem;
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: 0.02em;
        }

        .brand-text span {
            font-size: .72rem;
            color: var(--dim);
            letter-spacing: .1em;
        }

        .sidebar-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin-top: 12px;
        }

        .nav-group {
            font-size: .72rem;
            text-transform: uppercase;
            letter-spacing: .18em;
            color: var(--dim);
            padding: 12px 12px 8px;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            height: 48px;
            padding: 0 14px;
            border-radius: 12px;
            color: var(--muted);
            font-size: .92rem;
            font-weight: 500;
            transition: background .2s, color .2s;
            position: relative;
        }

        .nav-link i {
            width: 18px;
            text-align: center;
            font-size: .95rem;
            flex: 0 0 18px;
        }

        .nav-link:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }

        .nav-link.active {
            background: rgba(55, 242, 181, 0.08);
            color: var(--primary);
        }

        .nav-link.active::before {
            content: "";
            position: absolute;
            left: 0;
            top: 14px;
            bottom: 14px;
            width: 3px;
            border-radius: 0 4px 4px 0;
            background: var(--primary);
        }

        .sidebar-card {
            margin-top: auto;
            border: 1px solid var(--line);
            border-radius: 14px;
            background: rgba(255, 255, 255, 0.03);
            padding: 14px;
        }

        .sidebar-card .s-card-title {
            display: flex;
            align-items: center;
            font-size: .86rem;
            color: var(--text);
            gap: 8px;
            font-weight: 600;
        }

        .status-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--primary);
            box-shadow: 0 0 0 4px rgba(55, 242, 181, .14);
        }

        .sidebar-card p {
            margin: 8px 0 0;
            font-size: .76rem;
            color: var(--dim);
            line-height: 1.6;
        }

        /* ===== Mobile top ===== */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 60;
            height: 64px;
            background: rgba(8, 12, 16, .86);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--line);
            padding: 0 18px;
            align-items: center;
            gap: 12px;
        }

        .mobile-header .hamburger {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--line);
            border-radius: 10px;
            font-size: 1rem;
            cursor: pointer;
            transition: border .2s;
        }

        .mobile-header .hamburger:hover {
            border-color: rgba(255, 255, 255, 0.3);
        }

        .mobile-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            color: #fff;
        }

        .mobile-brand .brand-logo {
            width: 34px;
            height: 34px;
            flex-basis: 34px;
            border-radius: 10px;
            font-size: 15px;
        }

        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            opacity: 0;
            visibility: hidden;
            transition: opacity .25s, visibility .25s;
            z-index: 90;
        }

        .drawer-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        .drawer {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 288px;
            background: #0A0E12;
            padding: 20px 14px;
            z-index: 95;
            transform: translateX(-106%);
            transition: transform .3s ease;
            display: flex;
            flex-direction: column;
            border-right: 1px solid rgba(255, 255, 255, 0.05);
        }

        .drawer.open {
            transform: translateX(0);
        }

        .drawer .drawer-close {
            position: absolute;
            top: 16px;
            right: 14px;
            width: 34px;
            height: 34px;
            border-radius: 10px;
            background: rgba(255, 255, 255, .05);
            border: 1px solid var(--line);
            color: #fff;
            cursor: pointer;
            font-size: .9rem;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 48px;
            padding: 0 22px;
            border-radius: 999px;
            font-weight: 700;
            font-size: .92rem;
            border: 1px solid transparent;
            cursor: pointer;
            transition: transform .18s, box-shadow .2s, border .2s, background .2s;
            width: auto;
            white-space: nowrap;
        }

        .btn:active {
            transform: scale(0.98);
        }

        .btn-primary {
            background: var(--primary);
            color: #07110D;
            box-shadow: 0 0 0 rgba(55, 242, 181, 0);
        }

        .btn-primary:hover {
            box-shadow: 0 0 24px rgba(55, 242, 181, 0.35);
            background: #5cf7c3;
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text);
            border-color: rgba(255, 255, 255, .22);
        }

        .btn-ghost:hover {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: 0 0 18px rgba(255, 177, 61, 0.12);
        }

        .btn-dark {
            background: var(--card);
            color: #fff;
            border-color: var(--line);
        }

        .btn-dark:hover {
            border-color: rgba(55, 242, 181, .5);
        }

        .btn-sm {
            height: 40px;
            padding: 0 16px;
            font-size: .84rem;
        }

        /* ===== Hero / Page head ===== */
        .page-faq-hero {
            position: relative;
            overflow: hidden;
            border-bottom: 1px solid var(--line);
            background: linear-gradient(135deg, rgba(10, 14, 18, 0.96) 30%, rgba(16, 22, 29, .92) 100%);
        }

        .page-faq-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
            opacity: .18;
            pointer-events: none;
        }

        .page-faq-hero .container {
            position: relative;
            z-index: 2;
            padding-top: clamp(48px, 8vw, 92px);
            padding-bottom: clamp(40px, 6vw, 72px);
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: .82rem;
            color: var(--dim);
            margin-bottom: 26px;
        }

        .breadcrumb a {
            color: var(--muted);
            transition: color .2s;
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb i {
            font-size: .7rem;
            opacity: .7;
        }

        .hero-layout {
            display: grid;
            grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr);
            gap: clamp(28px, 5vw, 64px);
            align-items: center;
        }

        .hero-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border: 1px solid rgba(55, 242, 181, 0.25);
            background: rgba(55, 242, 181, 0.08);
            color: var(--primary);
            border-radius: 999px;
            font-size: .76rem;
            letter-spacing: .12em;
            margin-bottom: 22px;
            font-weight: 600;
        }

        .hero-layout h1 {
            font-size: clamp(1.9rem, 4.2vw, 3.2rem);
            font-weight: 900;
            line-height: 1.18;
            margin: 0 0 18px;
            letter-spacing: -0.01em;
            color: #fff;
        }

        .hero-layout h1 span {
            color: var(--primary);
        }

        .hero-lead {
            color: var(--muted);
            font-size: 1rem;
            line-height: 1.9;
            max-width: 640px;
            margin-bottom: 10px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 28px;
        }

        .hero-points {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 20px;
            margin-top: 24px;
            color: var(--muted);
            font-size: .82rem;
        }

        .hero-points span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-points i {
            color: var(--primary);
            font-size: .75rem;
        }

        /* ===== Quick guide side card ===== */
        .guide-card {
            border-radius: var(--r-lg);
            background: rgba(21, 29, 37, 0.8);
            border: 1px solid var(--line);
            padding: 24px;
            box-shadow: var(--shadow);
            backdrop-filter: blur(8px);
        }

        .guide-card-head {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 14px;
        }

        .guide-card-head .guide-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: radial-gradient(circle, rgba(55, 242, 181, .2), transparent);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(55, 242, 181, .25);
        }

        .guide-card-head strong {
            display: block;
            color: #fff;
            font-size: .95rem;
            line-height: 1.4;
        }

        .guide-card-head span {
            color: var(--dim);
            font-size: .74rem;
        }

        .guide-steps {
            margin: 4px 0 0;
            padding: 0;
            list-style: none;
            counter-reset: guide;
        }

        .guide-steps li {
            display: flex;
            gap: 12px;
            padding: 13px 0;
            border-bottom: 1px dashed rgba(255, 255, 255, .07);
        }

        .guide-steps li:last-child {
            border-bottom: 0;
        }

        .guide-steps .step-num {
            width: 28px;
            height: 28px;
            flex: 0 0 28px;
            border-radius: 50%;
            border: 1px solid rgba(55, 242, 181, .3);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: .72rem;
            font-family: "Barlow Condensed", "DIN Alternate", Arial, sans-serif;
            font-weight: 700;
            margin-top: 2px;
        }

        .guide-steps strong {
            color: #fff;
            font-size: .86rem;
            display: block;
            line-height: 1.5;
        }

        .guide-steps p {
            margin: 2px 0 0;
            font-size: .75rem;
            color: var(--dim);
            line-height: 1.65;
        }

        /* ===== Section layout ===== */
        .section-block {
            padding: clamp(56px, 8vw, 96px) 0;
        }

        .section-head {
            max-width: 800px;
            margin-bottom: 44px;
        }

        .section-head .kicker {
            color: var(--primary);
            font-size: .78rem;
            font-weight: 600;
            letter-spacing: .16em;
            margin-bottom: 10px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .section-head .kicker::before {
            content: "";
            width: 18px;
            height: 2px;
            background: var(--primary);
        }

        .section-head h2 {
            font-size: clamp(1.5rem, 2.6vw, 2.2rem);
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin: 0 0 14px;
            letter-spacing: -0.01em;
        }

        .section-head p {
            margin: 0;
            color: var(--muted);
            font-size: .95rem;
            line-height: 1.8;
        }

        .topic-quick {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 16px;
            margin-bottom: 48px;
        }

        .topic-chip {
            border: 1px solid var(--line);
            border-radius: 14px;
            background: rgba(255, 255, 255, 0.02);
            padding: 18px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: border .2s, box-shadow .2s, transform .2s;
        }

        .topic-chip:hover {
            border-color: rgba(55, 242, 181, 0.4);
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }

        .topic-chip i {
            color: var(--primary);
            width: 20px;
            text-align: center;
            font-size: 1.05rem;
        }

        .topic-chip strong {
            color: var(--text);
            font-size: .9rem;
            font-weight: 600;
            display: block;
            line-height: 1.4;
        }

        .topic-chip small {
            color: var(--dim);
            font-size: .72rem;
            line-height: 1.4;
            display: block;
        }

        /* ===== FAQ grid ===== */
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 18px 22px;
            align-items: start;
        }

        .faq-col {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            border-radius: 16px;
            border: 1px solid var(--line);
            background: var(--card);
            overflow: hidden;
            scroll-margin-top: 80px;
            transition: border .2s, box-shadow .2s;
        }

        .faq-item:hover {
            border-color: rgba(255, 255, 255, 0.14);
        }

        .faq-item[open] {
            border-color: rgba(55, 242, 181, 0.32);
            box-shadow: 0 0 0 1px rgba(55, 242, 181, 0.06), var(--shadow);
        }

        .faq-item summary {
            list-style: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 20px;
            font-weight: 600;
            color: #fff;
            font-size: .95rem;
            line-height: 1.55;
            min-height: 60px;
            transition: background .2s;
            position: relative;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            background: rgba(255, 255, 255, 0.02);
        }

        .faq-item summary .q-icon {
            width: 24px;
            height: 24px;
            flex: 0 0 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: .84rem;
            border: 1px solid rgba(55, 242, 181, .24);
            background: rgba(55, 242, 181, .06);
            border-radius: 8px;
        }

        .faq-item summary i.fa-plus {
            margin-left: auto;
            color: var(--dim);
            font-size: .78rem;
            transition: transform .2s, color .2s;
        }

        .faq-item[open] summary i.fa-plus {
            transform: rotate(45deg);
            color: var(--primary);
        }

        .faq-body {
            padding: 2px 20px 20px 58px;
            color: var(--muted);
            font-size: .86rem;
            line-height: 1.85;
        }

        .faq-body p {
            margin: 0 0 8px;
        }

        .faq-body p:last-child {
            margin-bottom: 0;
        }

        .faq-body ul {
            margin: 4px 0 0;
            padding-left: 16px;
        }

        .faq-body ul li {
            margin: 6px 0;
            position: relative;
        }

        .faq-body ul li::before {
            content: "";
            position: absolute;
            left: -14px;
            top: 12px;
            width: 4px;
            height: 4px;
            background: var(--primary);
            opacity: .7;
            border-radius: 50%;
        }

        .guide-note {
            grid-column: 1 / -1;
            border-radius: 14px;
            background: rgba(255, 177, 61, 0.05);
            border: 1px solid rgba(255, 177, 61, .22);
            color: var(--muted);
            font-size: .82rem;
            padding: 14px 18px;
            display: flex;
            gap: 10px;
            align-items: flex-start;
        }

        .guide-note i {
            color: var(--accent);
            margin-top: 5px;
            font-size: .76rem;
        }

        /* ===== CTA / contact ===== */
        .support-band {
            border-radius: 24px;
            background: linear-gradient(135deg, rgba(16, 22, 29, .96), rgba(21, 29, 37, .92));
            border: 1px solid rgba(255, 255, 255, .08);
            padding: clamp(28px, 5vw, 56px);
            margin-bottom: 48px;
            display: grid;
            grid-template-columns: minmax(0, 1.3fr) minmax(260px, .7fr);
            align-items: center;
            gap: 32px;
        }

        .support-copy h2 {
            color: #fff;
            font-size: clamp(1.3rem, 2.4vw, 1.9rem);
            font-weight: 800;
            margin: 0 0 12px;
            line-height: 1.3;
        }

        .support-copy p {
            color: var(--muted);
            font-size: .92rem;
            max-width: 560px;
            margin: 0;
            line-height: 1.8;
        }

        .support-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 22px;
        }

        .support-visual {
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid var(--line);
            min-height: 180px;
            background: linear-gradient(180deg, rgba(55, 242, 181, .12), transparent);
            position: relative;
            box-shadow: var(--shadow);
        }

        .support-visual img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: .45;
        }

        .support-visual-content {
            position: relative;
            z-index: 2;
            padding: 24px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            height: 100%;
            min-height: 180px;
        }

        .support-visual-content strong {
            color: #fff;
            font-size: 1rem;
            line-height: 1.5;
        }

        .support-visual-content span {
            color: var(--muted);
            font-size: .8rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #091015;
            border-top: 1px solid rgba(55, 242, 181, 0.18);
            padding: 52px 0 0;
        }

        .footer-brand-row {
            display: flex;
            justify-content: space-between;
            gap: 24px;
            padding-bottom: 26px;
            border-bottom: 1px solid var(--line);
            flex-wrap: wrap;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .footer-brand .brand-logo {
            width: 36px;
            height: 36px;
            flex-basis: 36px;
            border-radius: 11px;
            font-size: 15px;
        }

        .footer-desc {
            color: var(--dim);
            max-width: 480px;
            font-size: .82rem;
            margin: 0;
            line-height: 1.8;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, minmax(0, 1fr));
            gap: 32px 24px;
            padding: 36px 0 40px;
        }

        .footer-logo-mark {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #fff;
            font-size: .96rem;
            margin-bottom: 14px;
        }

        .footer-logo-mark .brand-logo {
            width: 34px;
            height: 34px;
            flex-basis: 34px;
            border-radius: 10px;
            font-size: 14px;
        }

        .footer-col h4 {
            font-size: .86rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 14px;
            letter-spacing: .08em;
        }

        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 9px;
        }

        .footer-col ul a {
            color: var(--muted);
            font-size: .82rem;
            transition: color .2s, padding-left .2s;
        }

        .footer-col ul a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid var(--line);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            color: var(--dim);
            font-size: .78rem;
        }

        /* ===== Response ===== */
        @media (max-width: 1280px) {
            .topic-quick {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-106%);
                transition: transform .32s ease;
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .main-area {
                margin-left: 0;
            }

            .mobile-header {
                display: flex;
            }

            .faq-grid {
                grid-template-columns: 1fr;
            }

            .hero-layout {
                grid-template-columns: 1fr;
            }

            .support-band {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px 24px;
            }

            .guide-note {
                grid-column: auto;
            }
        }

        @media (max-width: 768px) {
            .topic-quick {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .faq-body {
                padding-left: 20px;
            }

            .hero-actions .btn {
                flex: 1 1 auto;
            }

            .container {
                padding-left: 18px;
                padding-right: 18px;
            }
        }

        @media (max-width: 560px) {
            .topic-quick {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
            }

            .footer-brand-row {
                flex-direction: column;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                padding-bottom: 22px;
            }

            .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .support-actions {
                flex-direction: column;
                width: 100%;
            }

            .support-actions .btn {
                width: 100%;
            }

            .guide-card {
                padding: 18px;
            }
        }