/* roulang page: index */
:root {
  --bg: #0b0f17;
  --bg-2: #0e1420;
  --surface: #111a29;
  --surface-2: #151f32;
  --text: #f2f6fc;
  --muted: #9aa7bc;
  --weak: #5e6b80;
  --primary: #3d7eff;
  --primary-rgb: 61, 126, 255;
  --primary-light: #6b9cff;
  --accent: #20e1b0;
  --accent-rgb: 32, 225, 176;
  --night: #25344c;
  --warning: #ffb02e;
  --danger: #e5484d;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow: 0 12px 32px rgba(0, 0, 0, .35);
  --shadow-glow: 0 0 0 4px rgba(61, 126, 255, .12), 0 8px 30px rgba(61, 126, 255, .28);
  --border: rgba(255, 255, 255, .08);
  --border-strong: rgba(255, 255, 255, .14);
  --space-section: 96px;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.78;
  overflow-x: hidden;
}
img { max-width: 100%; display: inline-block; }
a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color .2s ease;
}
a:hover { color: #fff; }
a:focus-visible, button:focus-visible, .btn:focus-visible {
  outline: 2px solid rgba(var(--primary-rgb), .65);
  outline-offset: 3px;
  border-radius: 6px;
}
ul, ol { padding: 0; margin: 0; list-style: none; }
h1, h2, h3, h4, h5 {
  margin: 0;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -.01em;
}
.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}
.section {
  padding-top: var(--space-section);
  padding-bottom: var(--space-section);
  position: relative;
}
.section-alt { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
::selection { background: rgba(61, 126, 255, .35); color: #fff; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: .78rem 1.6rem;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .01em;
  transition: all .22s ease;
  white-space: nowrap;
}
.btn i { font-size: .9em; }
.btn-brand {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 0 0 4px rgba(61, 126, 255, .12), 0 10px 30px rgba(61, 126, 255, .28);
}
.btn-brand:hover, .btn-brand:active {
  background: var(--primary-light);
  border-color: var(--primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 0 0 6px rgba(61, 126, 255, .16), 0 14px 34px rgba(61, 126, 255, .36);
}
.btn-brand:active { transform: translateY(0); }
.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, .14);
  color: var(--text);
  box-shadow: none;
}
.btn-ghost:hover {
  border-color: var(--primary);
  color: #fff;
  box-shadow: 0 0 24px rgba(61, 126, 255, .22);
  transform: translateY(-2px);
}
.btn-ghost:active { transform: translateY(0); }
.btn-accent {
  background: var(--accent);
  color: #04110d;
  box-shadow: 0 0 0 4px rgba(32, 225, 176, .1), 0 10px 26px rgba(32, 225, 176, .18);
}
.btn-accent:hover, .btn-accent:active {
  background: #63f2ca;
  color: #04110d;
  transform: translateY(-2px);
}
.btn-accent:active { transform: translateY(0); }
.btn-lg { padding: 1rem 2rem; font-size: 17px; }

/* ---------- kicker / section heading ---------- */
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.kicker::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--accent);
  display: inline-block;
  border-radius: 4px;
}
.section-heading {
  max-width: 760px;
  margin: 0 auto 46px;
  text-align: center;
}
.section-heading .kicker { justify-content: center; }
.section-heading h2 { font-size: clamp(28px, 3vw, 38px); line-height: 1.3; margin-bottom: 10px; }
.section-heading p { color: var(--muted); font-size: 16px; margin: 0; }

/* ---------- header / navigation ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1040;
  width: 100%;
  min-height: 76px;
  display: flex;
  align-items: center;
  background: rgba(11, 15, 23, .86);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  transition: all .2s ease;
}
.site-header .container { display: flex; align-items: center; flex-wrap: nowrap; }
.navbar { padding: 0 !important; min-height: 76px; }
.navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0;
  margin-right: auto;
  color: var(--text) !important;
}
.logo-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  flex: 0 0 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), #1db2ff);
  color: #fff;
  font-size: 20px;
  box-shadow: 0 6px 20px rgba(61, 126, 255, .4);
}
.brand-text {
  font-size: 21px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--text);
  white-space: nowrap;
}
.brand-text em {
  font-style: normal;
  font-size: .78em;
  vertical-align: 2px;
  color: var(--primary-light);
  margin-left: 2px;
  font-weight: 800;
}
.site-header .navbar-collapse {
  justify-content: flex-end;
  align-items: center;
  gap: 2px;
}
.nav-item { margin: 0 4px; position: relative; }
.nav-link {
  display: inline-flex;
  align-items: center;
  height: 76px;
  padding: 0 6px !important;
  margin: 0 10px;
  color: var(--muted) !important;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  background: transparent !important;
  border-bottom: 2px solid transparent;
  transition: color .2s ease;
  line-height: 76px;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 20px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transform: scaleX(.5);
  transition: all .22s ease;
}
.nav-link:hover, .nav-link.active { color: #fff !important; }
.nav-link:hover::after, .nav-link.active::after { opacity: 1; transform: scaleX(1); }
.header-cta { margin-left: 20px; }
.mobile-cta { display: none; }

/* mobile header */
@media (max-width: 991.98px) {
  .site-header { min-height: 64px; }
  .navbar { min-height: 64px; }
  .navbar-brand { margin-right: 0; }
  .logo-mark { width: 36px; height: 36px; flex-basis: 36px; border-radius: 12px; }
  .brand-text { font-size: 18px; }
  .navbar-toggler {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border-strong);
    border-radius: 12px;
    background: transparent;
    color: #fff;
  }
  .navbar-toggler:focus { box-shadow: none; }
  .navbar-toggler i { font-size: 20px; }
  .navbar-collapse {
    position: fixed;
    top: 72px;
    left: 16px;
    right: 16px;
    background: rgba(15, 22, 35, .96);
    border: 1px solid var(--border-strong);
    border-radius: 20px;
    padding: 14px 16px 18px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, .5);
    align-items: stretch;
    z-index: 999;
    backdrop-filter: blur(22px) saturate(160%);
    -webkit-backdrop-filter: blur(22px) saturate(160%);
  }
  .nav-link {
    height: auto;
    line-height: 1.4;
    padding: 14px 12px !important;
    border-bottom: 1px solid rgba(255, 255, 255, .06);
    width: 100%;
  }
  .nav-link::after { display: none; }
  .nav-link.active {
    color: #fff !important;
    background: transparent;
    position: relative;
  }
  .nav-link.active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    border-radius: 3px;
    background: var(--primary);
  }
  .header-cta { display: none; }
  .mobile-cta {
    display: flex;
    margin-top: 16px;
  }
  .mobile-cta .btn { width: 100%; }
}

/* ---------- hero ---------- */
.hero-section {
  position: relative;
  background: radial-gradient(ellipse at 15% 20%, rgba(61, 126, 255, .25), transparent 55%),
              radial-gradient(ellipse at 85% 10%, rgba(32, 225, 176, .16), transparent 45%),
              radial-gradient(ellipse at 50% 100%, rgba(61, 126, 255, .14), transparent 60%),
              var(--bg);
  overflow: hidden;
  padding-top: 80px;
  padding-bottom: 70px;
}
.hero-section::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(255, 255, 255, .045) 1px, transparent 1.5px);
  background-size: 7px 7px;
  opacity: .55;
}
.hero-section .container { position: relative; z-index: 2; }
.hero-contact { max-width: 560px; position: relative; z-index: 3; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(32, 225, 176, .1);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  border: 1px solid rgba(32, 225, 176, .25);
  margin-bottom: 22px;
}
.hero-badge i { font-size: 15px; }
.hero-title {
  font-size: clamp(38px, 4.6vw, 62px);
  font-weight: 800;
  line-height: 1.16;
  margin-bottom: 16px;
  letter-spacing: -.02em;
  color: #fff;
}
.hero-title span {
  background: linear-gradient(90deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-subs {
  font-size: 17px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0 0 30px;
  max-width: 540px;
}
.hero-btn-row { display: flex; flex-wrap: wrap; gap: 16px; }
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 26px;
  font-size: 13px;
  color: var(--weak);
}
.hero-trust span { display: inline-flex; align-items: center; gap: 6px; }
.hero-trust i { color: var(--accent); font-size: 14px; }

/* phone stage */
.phone-col { position: relative; z-index: 2; padding: 20px 0; }
.phone-stage { position: relative; max-width: 330px; margin: 0 auto; }
.phone-halo {
  position: absolute;
  width: 320px;
  height: 320px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(61, 126, 255, .45), transparent 65%);
  filter: blur(30px);
  opacity: .8;
  z-index: 0;
}
.phone-frame {
  position: relative;
  z-index: 2;
  width: 100%;
  aspect-ratio: 9/16;
  max-width: 328px;
  margin: 0 auto;
  background: #0a0e18;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 38px;
  padding: 8px;
  box-shadow: 0 0 0 8px rgba(255, 255, 255, .02), 0 30px 80px rgba(0, 0, 0, .45), 0 0 40px rgba(61,126,255,.12);
  backdrop-filter: blur(12px) saturate(120%);
}
.phone-screen {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 30px;
  overflow: hidden;
  background: #161c2b;
}
.phone-screen-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  z-index: 0;
}
.phone-screen:before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(0, 0, 0, .75) 0%, transparent 40%, rgba(0,0,0,.85) 100%);
  pointer-events: none;
}
.phone-status {
  position: absolute;
  top: 8px;
  left: 18px;
  right: 18px;
  z-index: 3;
  display: flex;
  justify-content: space-between;
  padding: 6px 0;
  font-size: 12px;
  color: #fff;
}
.phone-status span { display: inline-flex; align-items: center; gap: 5px; }
.phone-appbar {
  position: absolute;
  top: 38px;
  left: 14px;
  right: 14px;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 4px;
}
.phone-appbar strong { font-size: 15px; font-weight: 700; color: #fff; }
.phone-appbar i { color: rgba(255,255,255,.85); font-size: 18px; margin-left: 12px; }
.phone-tagline {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 92px;
  z-index: 3;
  color: #fff;
}
.phone-tagline .badge-glass {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,.13);
  border: 1px solid rgba(255,255,255,.18);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 11px;
  color: #dfe9ff;
}
.phone-tagline p {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  margin: 10px 0 0;
  letter-spacing: 0;
}
.phone-player {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 26px;
  z-index: 3;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 18px;
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.phone-player .play { width: 40px; height: 40px; flex: 0 0 40px; border-radius: 50%; background: var(--primary); display: inline-flex; align-items: center; justify-content: center; color: #fff; font-size: 16px; }
.phone-player .bar { flex: 1; }
.phone-player .bar .line { height: 3px; background: rgba(255,255,255,.2); border-radius: 3px; position: relative; overflow: hidden; }
.phone-player .bar .line span { display: block; width: 64%; height: 100%; background: var(--accent); border-radius: 3px; }
.phone-player .bar time { font-size: 11px; color: rgba(255,255,255,.7); margin-top: 4px; display: inline-flex; justify-content: space-between; width: 100%; }
.phone-player .icons i { color: rgba(255,255,255,.85); margin-left: 9px; font-size: 16px; }
.phone-float {
  position: absolute;
  z-index: 5;
  background: linear-gradient(145deg, rgba(255,255,255,.1), rgba(255,255,255,.04));
  border: 1px solid rgba(255,255,255,.18);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow: 0 20px 40px rgba(0,0,0,.35);
  border-radius: 16px;
  padding: 10px 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.phone-float i { font-size: 18px; color: var(--accent); }
.phone-float strong { font-size: 13px; line-height: 1.4; color: #fff; }
.phone-float span { font-size: 12px; color: var(--muted); }
.phone-float.f1 { left: -34px; top: 100px; animation: floatY 3s ease-in-out infinite; }
.phone-float.f2 { right: -20px; bottom: 150px; animation: floatY 3.6s ease-in-out infinite .5s; }
.phone-float.f2 i { color: var(--primary-light); }
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ---------- trust strip ---------- */
.trust-strip {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: #080c13;
  padding: 20px 0;
}
.trust-inner { display: flex; flex-wrap: wrap; gap: 14px 28px; justify-content: center; color: var(--muted); font-size: 14px; }
.trust-inner span { display: inline-flex; align-items: center; gap: 8px; }
.trust-inner i { color: var(--primary-light); }

/* ---------- hot cards ---------- */
.hot-card {
  border-radius: 20px;
  overflow: hidden;
  background: #111826;
  border: 1px solid var(--border);
  position: relative;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease;
  height: 100%;
}
.hot-card:hover { transform: scale(1.02); border-color: rgba(var(--primary-rgb), .5); box-shadow: 0 16px 36px rgba(0,0,0,.45), 0 0 24px rgba(var(--primary-rgb), .15); }
.hot-media { aspect-ratio: 4/5; position: relative; overflow: hidden; }
.hot-media img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .35s ease; }
.hot-card:hover .hot-media img { transform: scale(1.05); }
.hot-media:before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 38%, rgba(5, 8, 13, .95)); z-index: 2; }
.hot-badge { position: absolute; left: 12px; top: 12px; z-index: 3; background: linear-gradient(90deg, var(--primary), #1db2ff); box-shadow: 0 4px 16px rgba(61,126,255,.5); color: #fff; border-radius: 999px; padding: 4px 12px; font-size: 12px; font-weight: 700; }
.hot-badge.bright { background: linear-gradient(90deg, var(--accent), #abf7e4); color: #06251c; box-shadow: none; }
.hot-duration { position: absolute; right: 12px; bottom: 0; z-index: 3; background: rgba(0,0,0,.65); color: #fff; border-radius: 8px; padding: 2px 9px 4px; font-size: 12px; }
.hot-content { position: absolute; left: 0; right: 0; bottom: 0; z-index: 3; padding: 18px 18px 20px; }
.hot-content h3 { font-size: 16px; line-height: 1.45; margin-bottom: 4px; }
.hot-content h3 a { color: #fff; }
.hot-content h3 a:hover { color: var(--primary-light); }
.hot-content p { font-size: 13px; color: rgba(255,255,255,.72); margin: 0 0 10px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.hot-meta { display: flex; gap: 14px; font-size: 12px; color: rgba(255,255,255,.66); }

/* ---------- checklist rows ---------- */
.check-row { margin-bottom: 24px; }
.check-text { position: relative; z-index: 2; padding: 36px 34px; }
.check-text .big-seq {
  position: absolute;
  top: -22px;
  right: 6px;
  font-size: 96px;
  font-weight: 900;
  line-height: 1;
  color: rgba(255,255,255,.05);
  -webkit-text-stroke: 1px rgba(255,255,255,.15);
  pointer-events: none;
  z-index: -1;
}
.check-label { display: inline-flex; align-items: center; color: var(--accent); gap: 6px; font-size: 12px; font-weight: 700; letter-spacing: .06em; margin-bottom: 10px; }
.check-text h3 { font-size: 22px; margin-bottom: 10px; }
.check-text p { color: var(--muted); max-width: 400px; font-size: 15px; }
.check-img { position: relative; border-radius: 20px; overflow: hidden; border: 1px solid var(--border); aspect-ratio: 16/10; box-shadow: var(--shadow); }
.check-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .4s ease; }
.check-row:hover .check-img img { transform: scale(1.04); }
.check-img:after { content: ""; position: absolute; inset: 0; background: linear-gradient(130deg, rgba(61,126,255,.22), rgba(0,0,0,.2) 60%); }
.check-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--primary-light);
  font-weight: 600;
  margin-top: 10px;
}

/* ---------- testimonials ---------- */
.talk-card {
  background: linear-gradient(145deg, rgba(255,255,255,.08), rgba(255,255,255,.02));
  border: 1px solid rgba(255,255,255,.1);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-radius: 18px;
  padding: 24px 24px 20px;
  position: relative;
  height: 100%;
  transition: border-color .2s ease, transform .2s ease;
}
.talk-card:hover { border-color: rgba(255,255,255,.2); transform: translateY(-3px); }
.talk-star { color: var(--warning); font-size: 13px; margin-bottom: 10px; }
.talk-card p { font-size: 15px; color: #d4def0; line-height: 1.8; margin: 0 0 18px; min-height: 76px; }
.talk-user { display: flex; align-items: center; gap: 12px; }
.talk-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--night), var(--primary));
  color: #fff;
  font-size: 14px;
  flex: 0 0 40px;
}
.talk-user strong { display: block; font-size: 14px; color: #fff; }
.talk-user span { font-size: 12px; color: var(--weak); }

/* ---------- cta block ---------- */
.cta-block { position: relative; overflow: hidden; text-align: center; padding: 74px 24px; border-radius: 24px; background: radial-gradient(circle at 70% 10%, rgba(32,225,176,.2), transparent 45%), radial-gradient(circle at 20% 30%, rgba(61,126,255,.3), transparent 60%), #0d1422; border: 1px solid var(--border); }
.cta-block:before { content: ""; position: absolute; width: 420px; height: 420px; left: -160px; bottom: -210px; border-radius: 50%; background: rgba(61,126,255,.28); filter: blur(100px); animation: pulseGlow 3.8s ease infinite; }
.cta-block:after { content: ""; position: absolute; width: 340px; height: 340px; right: -180px; top: -180px; background: rgba(32,225,176,.18); border-radius: 50%; filter: blur(100px); }
@keyframes pulseGlow { 0%,100% { opacity: .55; } 50% { opacity: 1; } }
.cta-block h2 { font-size: clamp(28px, 3vw, 38px); margin-bottom: 12px; position: relative; }
.cta-block p { color: var(--muted); font-size: 17px; max-width: 640px; margin: 0 auto 28px; position: relative; }
.cta-block .btn { position: relative; }

/* ---------- news list ---------- */
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #101826;
  padding: 20px 22px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: border-color .2s ease, background .2s ease;
}
.news-item:hover { border-color: rgba(var(--primary-rgb), .4); background: #131c2c; }
.news-thumb {
  width: 88px;
  height: 72px;
  border-radius: 12px;
  flex: 0 0 88px;
  overflow: hidden;
  background: linear-gradient(135deg, #1d2b44, #132038);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 28px;
}
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-body { flex: 1; min-width: 0; }
.news-cat {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  color: var(--accent);
  background: rgba(32,225,176,.1);
  border: 1px solid rgba(32,225,176,.2);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 5px;
}
.news-time { font-size: 12px; color: var(--weak); display: flex; align-items: center; gap: 5px; }
.news-body h3 { font-size: 17px; margin: 3px 0 4px; line-height: 1.5; }
.news-body h3 a { color: var(--text); }
.news-body h3 a:hover { color: var(--primary-light); }
.news-body p { font-size: 13px; color: var(--muted); margin: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.empty-info { text-align: center; padding: 38px 16px; color: var(--weak); }
.empty-info i { font-size: 38px; opacity: .5; }

/* ---------- FAQ ---------- */
.faq-accordion { max-width: 880px; margin: 0 auto; }
.faq-accordion .accordion-item {
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: 16px !important;
  overflow: hidden;
  background: #111a29;
  transition: border-color .2s ease;
}
.faq-accordion .accordion-item:has(.accordion-button:not(.collapsed)) { border-color: rgba(var(--primary-rgb), .45); }
.faq-accordion .accordion-button {
  background: transparent;
  color: var(--text);
  font-size: 16px;
  font-weight: 600;
  padding: 20px 22px;
  border: none;
  box-shadow: none;
  align-items: center;
  gap: 12px;
  outline-offset: -2px;
}
.faq-accordion .accordion-button:hover { background: rgba(255,255,255,.02); }
.faq-accordion .accordion-button::after {
  content: "\f067";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  background-image: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background-color: rgba(255,255,255,.08);
  color: var(--accent);
  transition: transform .25s ease;
  flex: 0 0 28px;
}
.faq-accordion .accordion-button:not(.collapsed)::after { transform: rotate(135deg); background-color: rgba(32,225,176,.16); }
.faq-accordion .accordion-collapse { border: none; }
.faq-accordion .accordion-body { padding: 0 22px 20px; color: var(--muted); font-size: 15px; line-height: 1.85; border: none; }

/* ---------- footer ---------- */
.footer { background: #070b12; border-top: 1px solid var(--border); padding-top: 24px; }
.footer-cta {
  padding: 50px 0 32px;
}
.footer-cta-inner {
  background: linear-gradient(90deg, rgba(61,126,255,.16), rgba(32,225,176,.1));
  border: 1px solid rgba(61,126,255,.22);
  border-radius: 20px;
  padding: 30px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-cta h3 { font-size: 20px; margin-bottom: 4px; }
.footer-cta p { color: var(--muted); font-size: 14px; margin: 0; }
.footer-main { padding: 46px 0 30px; }
.footer-main h4 { font-size: 15px; color: #fff; margin-bottom: 14px; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { color: var(--muted); font-size: 14px; }
.footer-links a:hover { color: var(--primary-light); }
.footer-brand p { color: var(--muted); font-size: 14px; max-width: 260px; margin: 12px 0 16px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 14px 0;
  font-size: 12px;
  color: var(--weak);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
}
.mobile-download { display: none; }

/* ---------- responsive ---------- */
@media (max-width: 991.98px) {
  :root { --space-section: 68px; }
  .hero-section { padding-top: 54px; padding-bottom: 54px; }
  .phone-stage { max-width: 300px; }
  .check-text { padding: 20px 8px 30px; }
  .check-text .big-seq { font-size: 76px; }
  .news-item { padding: 16px; gap: 14px; }
  .news-thumb { width: 72px; height: 60px; flex-basis: 72px; }
}
@media (max-width: 767.98px) {
  :root { --space-section: 56px; }
  .hero-title { font-size: 40px; }
  .hero-btn-row .btn { width: 100%; }
  .section-heading { margin-bottom: 32px; }
  .footer-cta-inner { flex-direction: column; align-items: flex-start; }
  .mobile-download {
    display: flex;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1020;
    background: rgba(12, 17, 27, .96);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid var(--border);
    padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }
  .mobile-download span { font-size: 13px; color: var(--muted); }
  .mobile-download .btn { padding: .6rem 1rem; font-size: 14px; }
  footer { padding-bottom: 52px; }
}
@media (max-width: 575.98px) {
  .hero-title { font-size: 34px; line-height: 1.25; }
  .phone-stage { max-width: 64vw; }
  .phone-frame { border-radius: 30px; }
  .hot-content { padding: 16px; }
  .news-item { flex-direction: column; align-items: stretch; }
  .news-thumb { width: 100%; height: 120px; flex-basis: auto; }
  .news-body p { white-space: normal; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
}

/* roulang page: article */
:root {
            --bg-body: #0B0F17;
            --bg-deep: #070A10;
            --bg-panel: #0E1420;
            --bg-card: rgba(255, 255, 255, 0.03);
            --bg-soft: rgba(255, 255, 255, 0.05);
            --line: rgba(255, 255, 255, 0.08);
            --line-strong: rgba(255, 255, 255, 0.14);
            --text-main: #F2F6FC;
            --text-sub: #9AA7BC;
            --text-weak: #5E6B80;
            --brand: #3D7EFF;
            --accent: #20E1B0;
            --warning: #FFB02E;
            --radius-xl: 28px;
            --radius-lg: 20px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.35);
            --shadow-cta: 0 0 0 4px rgba(61, 126, 255, 0.12), 0 8px 30px rgba(61, 126, 255, 0.28);
            --spacer: 96px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            background-image:
                radial-gradient(circle at 10% 2%, rgba(61, 126, 255, 0.14), transparent 25%),
                radial-gradient(circle at 90% 12%, rgba(32, 225, 176, 0.08), transparent 22%),
                radial-gradient(circle at 60% 90%, rgba(61, 126, 255, 0.06), transparent 28%);
            background-attachment: fixed;
            overflow-x: hidden;
        }

        body::selection {
            background: rgba(61, 126, 255, 0.35);
            color: #fff;
        }

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

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

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

        button,
        input {
            font: inherit;
        }

        button:focus-visible,
        a:focus-visible,
        .form-control:focus-visible {
            outline: 2px solid rgba(61, 126, 255, 0.6);
            outline-offset: 3px;
        }

        .skip-link {
            position: fixed;
            top: -60px;
            left: 16px;
            z-index: 2000;
            background: var(--brand);
            color: #fff;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 14px;
            transition: top 0.2s ease;
        }

        .skip-link:focus {
            top: 16px;
            color: #fff;
        }

        .btn {
            --bs-btn-padding-y: 0.7rem;
            --bs-btn-padding-x: 1.5rem;
            border-radius: 999px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 1px solid transparent;
            transition: all 0.25s ease;
            white-space: nowrap;
        }

        .btn-brand {
            background: linear-gradient(135deg, #3D7EFF 0%, #2559D9 100%);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: var(--shadow-cta);
        }

        .btn-brand:hover {
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 0 0 5px rgba(61, 126, 255, 0.16), 0 12px 34px rgba(61, 126, 255, 0.38);
        }

        .btn-brand:active {
            transform: translateY(0);
            box-shadow: 0 0 0 3px rgba(61, 126, 255, 0.12), 0 8px 22px rgba(61, 126, 255, 0.25);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-main);
            border: 1px solid rgba(255, 255, 255, 0.14);
            backdrop-filter: blur(8px);
        }

        .btn-ghost:hover {
            color: #fff;
            border-color: rgba(61, 126, 255, 0.7);
            background: rgba(61, 126, 255, 0.08);
            transform: translateY(-2px);
        }

        .btn-sm-custom {
            padding: 0.44rem 1rem;
            font-size: 14px;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1500;
            background: rgba(11, 15, 23, 0.84);
            backdrop-filter: blur(20px) saturate(150%);
            -webkit-backdrop-filter: blur(20px) saturate(150%);
            border-bottom: 1px solid var(--line);
            transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .site-header.header-scrolled {
            background: rgba(7, 10, 16, 0.94);
            box-shadow: 0 10px 32px rgba(0, 0, 0, 0.35);
            border-bottom-color: rgba(61, 126, 255, 0.22);
        }

        .site-header .navbar {
            min-height: 76px;
            padding: 10px 0;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-mark {
            width: 38px;
            height: 38px;
            border-radius: 11px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            background: linear-gradient(135deg, rgba(61, 126, 255, 1), rgba(32, 225, 176, 1));
            box-shadow: 0 0 18px rgba(61, 126, 255, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.2);
            font-size: 15px;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .navbar-toggler {
            border: 0;
            padding: 8px 12px;
            font-size: 20px;
            color: var(--text-main);
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.06);
            width: 44px;
            height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: background 0.2s ease;
        }

        .navbar-toggler:hover {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid rgba(61, 126, 255, 0.6);
            outline-offset: 2px;
        }

        .site-header .navbar-collapse {
            align-items: center;
        }

        .site-header .navbar-nav {
            gap: 4px;
        }

        .site-header .nav-link {
            color: var(--text-sub);
            font-weight: 500;
            font-size: 15px;
            padding: 10px 16px;
            border-radius: 999px;
            position: relative;
            transition: color 0.2s ease, background 0.2s ease;
        }

        .site-header .nav-link::after {
            content: "";
            position: absolute;
            left: 18px;
            right: 18px;
            bottom: 5px;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--brand), var(--accent));
            opacity: 0;
            transform: scaleX(0.4);
            transform-origin: left center;
            transition: opacity 0.25s ease, transform 0.25s ease;
        }

        .site-header .nav-link:hover,
        .site-header .nav-link.active {
            color: #fff;
            background: rgba(61, 126, 255, 0.06);
        }

        .site-header .nav-link:hover::after,
        .site-header .nav-link.active::after {
            opacity: 1;
            transform: scaleX(1);
        }

        @media (min-width: 992px) {
            .site-header .navbar-nav {
                margin-right: auto;
                margin-left: 24px;
            }
        }

        .header-cta {
            padding: 0.66rem 1.75rem;
            font-size: 15px;
        }

        .mobile-cta {
            display: none;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--line);
        }

        @media (max-width: 991.98px) {
            .site-header .navbar {
                min-height: 64px;
            }

            .site-header .collapse.navbar-collapse {
                margin-top: 10px;
                background: rgba(12, 16, 26, 0.96);
                border: 1px solid rgba(255, 255, 255, 0.1);
                backdrop-filter: blur(22px) saturate(140%);
                -webkit-backdrop-filter: blur(22px) saturate(140%);
                border-radius: 20px;
                padding: 20px;
                box-shadow: 0 18px 48px rgba(0, 0, 0, 0.5);
            }

            .site-header .navbar-nav {
                gap: 0;
                width: 100%;
            }

            .site-header .nav-link {
                padding: 14px 16px;
                border-radius: 14px;
                margin-bottom: 4px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.04);
                font-size: 16px;
            }

            .site-header .nav-link::after {
                display: none;
            }

            .site-header .nav-link.active,
            .site-header .nav-link:hover {
                background: rgba(61, 126, 255, 0.14);
                color: #fff;
            }

            .header-cta {
                display: none !important;
            }

            .mobile-cta {
                display: block;
                text-align: center;
            }

            .mobile-cta .btn {
                width: 100%;
                margin-top: 4px;
            }
        }

        .main-article {
            padding: 28px 0 96px;
        }

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

        .breadcrumb-nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px;
            padding: 20px 0 18px;
            font-size: 14px;
            color: var(--text-weak);
            border-bottom: 1px solid var(--line);
            margin-bottom: 28px;
        }

        .breadcrumb-nav a {
            color: var(--text-sub);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color 0.2s ease;
        }

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

        .breadcrumb-nav .bc-sep {
            color: var(--text-weak);
            font-size: 12px;
            opacity: 0.7;
        }

        .breadcrumb-nav .current {
            color: var(--text-main);
            font-weight: 500;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            max-width: 300px;
            display: inline-block;
        }

        .article-shell {
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: 32px;
            padding: clamp(24px, 5vw, 60px);
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }

        .article-shell::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(61, 126, 255, 0.4), transparent);
        }

        .article-head {
            max-width: 860px;
            margin: 0 auto 32px;
            text-align: center;
        }

        .cat-chip {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 7px 16px;
            border-radius: 999px;
            background: rgba(61, 126, 255, 0.12);
            border: 1px solid rgba(61, 126, 255, 0.22);
            color: #6FA4FF;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.02em;
        }

        .article-head h1 {
            font-size: clamp(28px, 3.8vw, 46px);
            font-weight: 800;
            line-height: 1.16;
            color: #fff;
            margin: 18px 0 14px;
            letter-spacing: -0.02em;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 10px 24px;
            color: var(--text-weak);
            font-size: 14px;
        }

        .article-meta i {
            color: var(--brand);
            margin-right: 4px;
        }

        .article-meta .dot-sep {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.18);
            display: inline-block;
        }

        .article-cover {
            max-width: 1120px;
            margin: 0 auto 42px;
            border-radius: 24px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.1);
            position: relative;
            aspect-ratio: 16 / 8;
            background: linear-gradient(145deg, rgba(61, 126, 255, 0.14), rgba(32, 225, 176, 0.08));
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .article-cover::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 40%;
            background: linear-gradient(to top, rgba(7, 10, 16, 0.35), transparent);
            pointer-events: none;
        }

        .article-content {
            max-width: 800px;
            margin: 0 auto;
            font-size: 17px;
            line-height: 1.9;
            color: #D4DFF0;
        }

        .article-content p {
            margin-bottom: 26px;
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin: 48px 0 20px;
            padding-left: 16px;
            border-left: 4px solid var(--brand);
            border-radius: 2px;
            line-height: 1.4;
        }

        .article-content h3 {
            font-size: 21px;
            font-weight: 700;
            color: #fff;
            margin: 38px 0 16px;
        }

        .article-content blockquote {
            border-left: 4px solid rgba(32, 225, 176, 0.7);
            padding: 18px 22px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-sub);
            margin: 28px 0;
            font-style: normal;
        }

        .article-content ul,
        .article-content ol {
            padding-left: 1.6em;
            margin: 20px 0;
        }

        .article-content li {
            margin-bottom: 10px;
        }

        .article-content a {
            color: var(--brand);
            border-bottom: 1px solid rgba(61, 126, 255, 0.3);
        }

        .article-content img {
            border-radius: 16px;
            margin: 32px auto;
        }

        .article-content table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border-radius: 14px;
            margin: 28px 0;
            font-size: 15px;
            border: 1px solid var(--line);
        }

        .article-content th {
            background: rgba(255, 255, 255, 0.06);
            padding: 12px 16px;
            color: #fff;
        }

        .article-content td {
            padding: 12px 16px;
            border-top: 1px solid var(--line);
            color: var(--text-sub);
        }

        .article-tools {
            max-width: 800px;
            margin: 48px auto 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            border-top: 1px solid var(--line);
            padding-top: 28px;
        }

        .tag-label {
            font-size: 14px;
            color: var(--text-weak);
            margin-right: 2px;
        }

        .tag-pill {
            display: inline-flex;
            padding: 7px 15px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--text-sub);
            font-size: 13px;
            transition: all 0.2s ease;
            cursor: default;
        }

        .tag-pill:hover {
            color: #fff;
            border-color: rgba(61, 126, 255, 0.45);
            background: rgba(61, 126, 255, 0.16);
        }

        .share-btns {
            display: inline-flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .share-chip {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--line);
            border-radius: 999px;
            color: var(--text-sub);
            padding: 7px 14px;
            font-size: 13px;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .share-chip:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(61, 126, 255, 0.4);
        }

        .article-pager {
            max-width: 800px;
            margin: 42px auto 0;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .pager-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--line);
            border-radius: 18px;
            padding: 20px 24px;
            transition: all 0.25s ease;
            display: flex;
            flex-direction: column;
            gap: 8px;
            min-height: 112px;
        }

        .pager-card:hover {
            border-color: rgba(61, 126, 255, 0.45);
            background: rgba(61, 126, 255, 0.1);
            transform: translateY(-2px);
        }

        .pager-dir {
            font-size: 13px;
            color: var(--text-weak);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .pager-name {
            font-size: 16px;
            color: var(--text-main);
            font-weight: 600;
            line-height: 1.4;
        }

        .pager-next {
            text-align: right;
        }

        .pager-next .pager-dir {
            justify-content: flex-end;
        }

        .related-wrap {
            margin-top: 68px;
        }

        .section-head {
            margin-bottom: 34px;
        }

        .kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent);
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .kicker::before {
            content: "";
            width: 20px;
            height: 2px;
            background: linear-gradient(90deg, var(--accent), rgba(32, 225, 176, 0.2));
            border-radius: 2px;
        }

        .section-head h2 {
            font-size: clamp(26px, 3vw, 38px);
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 8px;
        }

        .related-card {
            display: flex;
            flex-direction: column;
            background: rgba(255, 255, 255, 0.035);
            border: 1px solid var(--line);
            border-radius: 20px;
            overflow: hidden;
            height: 100%;
            transition: all 0.3s ease;
            color: inherit;
        }

        .related-card:hover {
            color: inherit;
            transform: translateY(-4px);
            border-color: rgba(61, 126, 255, 0.38);
            box-shadow: 0 18px 42px rgba(0, 0, 0, 0.38);
        }

        .related-thumb {
            aspect-ratio: 4 / 5;
            position: relative;
            overflow: hidden;
            background: #0E1420;
        }

        .related-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }

        .related-card:hover .related-thumb img {
            transform: scale(1.04);
        }

        .related-thumb::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(7, 10, 16, 0.55), transparent 40%);
            pointer-events: none;
        }

        .related-info {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

        .related-info h3 {
            font-size: 16px;
            line-height: 1.55;
            color: #fff;
            font-weight: 600;
            transition: color 0.2s ease;
        }

        .related-card:hover .related-info h3 {
            color: #6FA4FF;
        }

        .related-meta {
            font-size: 13px;
            color: var(--text-weak);
            margin-top: auto;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .return-row {
            text-align: center;
            margin-top: 48px;
        }

        .not-found-panel {
            background: var(--bg-card);
            border: 1px solid var(--line);
            border-radius: 28px;
            padding: 72px 28px;
            text-align: center;
            max-width: 720px;
            margin: 40px auto 0;
            box-shadow: var(--shadow-card);
        }

        .not-found-panel .nf-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 72px;
            height: 72px;
            border-radius: 20px;
            background: rgba(61, 126, 255, 0.12);
            color: var(--brand);
            font-size: 28px;
            margin-bottom: 22px;
            border: 1px solid rgba(61, 126, 255, 0.18);
        }

        .not-found-panel h1 {
            font-size: 30px;
            color: #fff;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .not-found-panel p {
            color: var(--text-sub);
            margin-bottom: 28px;
            max-width: 420px;
            margin-left: auto;
            margin-right: auto;
        }

        .footer-main {
            background: rgba(7, 10, 16, 0.98);
            border-top: 1px solid var(--line);
            padding: 80px 0 0;
            position: relative;
            overflow: hidden;
        }

        .footer-main::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(61, 126, 255, 0.5), rgba(32, 225, 176, 0.4), transparent);
        }

        .footer-main h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .footer-main p {
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.85;
            margin: 14px 0 22px;
            max-width: 420px;
        }

        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .footer-links li + li {
            margin-top: 12px;
        }

        .footer-links a {
            color: var(--text-sub);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

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

        .footer-links i {
            color: rgba(255, 255, 255, 0.3);
            font-size: 15px;
            width: 16px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            margin-top: 56px;
            padding: 22px 0;
        }

        .footer-bottom .container {
            display: flex;
            justify-content: space-between;
            gap: 8px;
            flex-wrap: wrap;
            color: var(--text-weak);
            font-size: 12px;
        }

        .footer-bottom a {
            color: var(--text-weak);
        }

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

        @media (max-width: 767.98px) {
            :root {
                --spacer: 64px;
            }

            .main-article {
                padding-bottom: 64px;
            }

            .breadcrumb-nav .current {
                max-width: 160px;
            }

            .article-shell {
                border-radius: 20px;
                padding: 22px 18px;
            }

            .article-cover {
                aspect-ratio: 16 / 10;
                border-radius: 16px;
            }

            .article-meta {
                gap: 8px 16px;
                font-size: 13px;
            }

            .article-tools {
                justify-content: center;
                flex-direction: column;
            }

            .article-pager {
                grid-template-columns: 1fr;
            }

            .pager-next {
                text-align: left;
            }

            .pager-next .pager-dir {
                justify-content: flex-start;
            }

            .footer-main {
                padding-top: 64px;
            }

            .footer-bottom .container {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 575.98px) {
            .brand-text {
                font-size: 17px;
            }

            .site-header .navbar {
                min-height: 62px;
            }

            .breadcrumb-nav {
                gap: 7px;
                font-size: 13px;
            }

            .article-head h1 {
                font-size: 26px;
            }

            .article-content {
                font-size: 16px;
            }

            .article-content h2 {
                font-size: 22px;
            }

            .article-tools {
                align-items: stretch;
            }

            .tag-pill,
            .share-chip {
                font-size: 12px;
                padding: 6px 12px;
            }
        }

/* roulang page: category1 */
:root {
            --bg: #0B0F17;
            --bg-soft: #0E1420;
            --panel: #111A2B;
            --panel-deep: #0C111B;
            --text: #F2F6FC;
            --muted: #9AA7BC;
            --faint: #5E6B80;
            --primary: #3D7EFF;
            --primary-deep: #2C6BE0;
            --accent: #20E1B0;
            --dark-blue: #25344C;
            --border: rgba(255, 255, 255, 0.08);
            --border-light: rgba(255, 255, 255, 0.14);
            --radius-xl: 24px;
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-pill: 999px;
            --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 0 4px rgba(61, 126, 255, 0.12), 0 8px 30px rgba(61, 126, 255, 0.28);
            --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--bg);
            color: var(--text);
            font-family: var(--font-main);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
        }

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

        .container {
            max-width: 1200px;
        }

        .section-space {
            padding: 96px 0;
        }

        .text-muted {
            color: var(--muted) !important;
        }

        .section-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--accent);
            margin-bottom: 14px;
        }

        .section-kicker::before {
            content: "";
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 12px rgba(32, 225, 176, 0.7);
        }

        .section-title {
            font-size: clamp(28px, 3vw, 38px);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.01em;
            margin: 0 0 14px;
        }

        .section-sub {
            font-size: 16px;
            color: var(--muted);
            max-width: 760px;
            margin-bottom: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-pill);
            font-weight: 600;
            padding: 10px 22px;
            font-size: 15px;
            line-height: 1.4;
            border: 1px solid transparent;
            transition: all 0.2s ease;
        }

        .btn:hover {
            color: #fff;
            transform: translateY(-2px);
        }

        .btn:focus-visible,
        .btn-brand:focus-visible {
            outline: 2px solid rgba(61, 126, 255, 0.6);
            outline-offset: 3px;
            box-shadow: none;
        }

        .btn-brand {
            background: linear-gradient(135deg, var(--primary), var(--primary-deep));
            color: #fff !important;
            border: none;
            box-shadow: 0 8px 24px rgba(61, 126, 255, 0.3);
        }

        .btn-brand:hover {
            background: linear-gradient(135deg, #57a0ff, #3574ed);
            box-shadow: 0 10px 32px rgba(61, 126, 255, 0.42);
        }

        .btn-brand:active {
            transform: translateY(0);
            box-shadow: 0 6px 18px rgba(61, 126, 255, 0.3);
        }

        .btn-glow {
            box-shadow: var(--shadow-glow);
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid var(--border-light);
            color: var(--text);
        }

        .btn-ghost:hover {
            color: #fff;
            border-color: rgba(100, 170, 255, 0.7);
            background: rgba(61, 126, 255, 0.08);
        }

        .btn-ghost-light {
            background: rgba(255, 255, 255, 0.07);
            border: 1px solid rgba(255, 255, 255, 0.16);
            color: #fff;
        }

        .btn-ghost-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.5);
        }

        /* ========== Header ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: rgba(11, 15, 23, 0.78);
            backdrop-filter: blur(20px) saturate(150%);
            -webkit-backdrop-filter: blur(20px) saturate(150%);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .navbar {
            padding: 0;
            min-height: 76px;
        }

        .site-header .navbar .container {
            flex-wrap: nowrap;
            align-items: center;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            margin-right: 24px;
            color: var(--text);
            font-size: 1.3rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: #fff;
        }

        .logo-mark {
            width: 38px;
            height: 38px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-size: 16px;
            box-shadow: 0 6px 18px rgba(61, 126, 255, 0.35);
        }

        .brand-text {
            line-height: 1.2;
        }

        .navbar-nav {
            align-items: center;
            flex-direction: row;
            margin-left: auto;
        }

        .navbar-nav .nav-item {
            list-style: none;
        }

        .navbar-nav .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            padding: 10px 14px;
            font-weight: 500;
            font-size: 15px;
            color: var(--muted);
            border-radius: var(--radius-pill);
            white-space: nowrap;
        }

        .navbar-nav .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
        }

        .navbar-nav .nav-link.active {
            color: #fff;
        }

        .header-cta {
            margin-left: 18px;
            flex: 0 0 auto;
        }

        .mobile-cta {
            display: none;
        }

        .navbar-toggler {
            border: 0;
            background: rgba(255, 255, 255, 0.03);
            color: var(--text);
            padding: 8px 12px;
            font-size: 20px;
            border-radius: 10px;
            box-shadow: none !important;
        }

        .navbar-toggler:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.08);
        }

        @media (max-width: 991.98px) {
            .navbar {
                min-height: 64px;
            }

            .navbar .container {
                flex-wrap: wrap;
            }

            .navbar-collapse {
                width: 100%;
                margin-top: 14px;
                padding: 18px;
                background: rgba(14, 20, 32, 0.96);
                border: 1px solid var(--border);
                border-radius: 18px;
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
            }

            .navbar-nav {
                flex-direction: column;
                align-items: stretch;
                width: 100%;
                margin-left: 0;
            }

            .navbar-nav .nav-link {
                width: 100%;
                min-height: 48px;
                padding: 12px 16px;
                border-radius: 12px;
                color: var(--muted);
            }

            .navbar-nav .nav-link:hover {
                background: rgba(255, 255, 255, 0.05);
            }

            .navbar-nav .nav-link.active {
                background: rgba(61, 126, 255, 0.15);
                color: #fff;
            }

            .header-cta {
                display: none !important;
            }

            .mobile-cta {
                display: block;
                margin-top: 14px;
            }

            .mobile-cta .btn {
                width: 100%;
                justify-content: center;
            }
        }

        @media (min-width: 992px) {
            .navbar-nav .nav-link.active::after {
                content: "";
                position: absolute;
                left: 16px;
                right: 16px;
                bottom: 4px;
                height: 2px;
                background: linear-gradient(90deg, var(--primary), var(--accent));
                border-radius: 4px;
            }
        }

        /* ========== Category Hero ========== */
        .category-hero {
            position: relative;
            padding: 110px 0 90px;
            overflow: hidden;
            background-color: var(--bg);
            background-image:
                radial-gradient(circle at 12% 18%, rgba(61, 126, 255, 0.35), transparent 32%),
                radial-gradient(circle at 86% 10%, rgba(32, 225, 176, 0.15), transparent 28%),
                linear-gradient(180deg, rgba(11, 15, 23, 0.5), rgba(11, 15, 23, 0.98)),
                url("/assets/images/backpic/back-1.webp");
            background-size: cover;
            background-position: center;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background:
                radial-gradient(700px 320px at 20% 10%, rgba(61, 126, 255, 0.2), transparent 70%),
                radial-gradient(500px 300px at 85% 85%, rgba(32, 225, 176, 0.08), transparent 60%);
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-kicker {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--accent);
            background: rgba(32, 225, 176, 0.08);
            border: 1px solid rgba(32, 225, 176, 0.16);
            padding: 6px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 22px;
        }

        .category-hero h1 {
            font-size: clamp(40px, 5vw, 62px);
            font-weight: 800;
            line-height: 1.15;
            margin: 0 0 18px;
            letter-spacing: -0.02em;
        }

        .hero-lead {
            font-size: 18px;
            color: var(--muted);
            max-width: 560px;
            line-height: 1.8;
            margin-bottom: 18px;
        }

        .hero-intro {
            font-size: 15px;
            color: var(--muted);
            max-width: 560px;
            line-height: 1.8;
            opacity: 0.9;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-top: 24px;
        }

        .hero-points {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 20px;
            list-style: none;
            padding: 0;
            margin: 24px 0 0;
            font-size: 14px;
            color: var(--muted);
        }

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

        .hero-points i {
            color: var(--accent);
            font-size: 13px;
        }

        .hero-visual {
            position: relative;
        }

        .hero-media-wrap {
            position: relative;
            max-width: 560px;
            margin-left: auto;
            padding: 12px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 28px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: 0 30px 70px rgba(0, 0, 0, 0.45);
        }

        .hero-media-wrap .media-cover {
            border-radius: 20px;
            overflow: hidden;
            position: relative;
            isolation: isolate;
            background: #0a1017;
        }

        .hero-media-wrap img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }

        .hero-media-wrap .media-shade {
            position: absolute;
            inset: auto 0 0 0;
            height: 60%;
            background: linear-gradient(transparent, rgba(8, 12, 20, 0.85));
            pointer-events: none;
            border-radius: 20px;
        }

        .hero-chip {
            position: absolute;
            left: 18px;
            top: 18px;
            z-index: 3;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(11, 15, 23, 0.72);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 999px;
            padding: 7px 13px;
            font-size: 13px;
            color: #fff;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }

        .hero-chip::before {
            content: "";
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 0 0 rgba(32, 225, 176, 0.6);
            animation: pulse 1.8s infinite;
        }

        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(32, 225, 176, 0.5);
            }
            70% {
                box-shadow: 0 0 0 8px rgba(32, 225, 176, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(32, 225, 176, 0);
            }
        }

        .glass-note {
            position: absolute;
            right: -16px;
            bottom: 38px;
            z-index: 3;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.16);
            backdrop-filter: blur(20px) saturate(140%);
            -webkit-backdrop-filter: blur(20px) saturate(140%);
            border-radius: 16px;
            padding: 12px 16px;
            box-shadow: 0 8px 30px rgba(0, 20, 60, 0.25);
            color: var(--text);
        }

        .glass-note span {
            display: block;
            font-size: 12px;
            color: var(--accent);
            margin-bottom: 2px;
        }

        .glass-note strong {
            font-size: 15px;
            letter-spacing: 0.02em;
        }

        @media (max-width: 991.98px) {
            .category-hero {
                padding: 72px 0;
            }

            .hero-visual {
                margin-top: 40px;
            }

            .hero-media-wrap {
                max-width: 560px;
                margin: 0 auto;
            }

            .glass-note {
                right: 8px;
                bottom: 12px;
            }
        }

        @media (max-width: 575.98px) {
            .section-space {
                padding: 64px 0;
            }

            .category-hero h1 {
                font-size: 38px;
            }

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

            .glass-note {
                right: -4px;
                bottom: 6px;
            }
        }

        /* ========== Feature Large Cards ========== */
        .feature-section {
            background: var(--bg-soft);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .section-head-row {
            margin-bottom: 40px;
        }

        .feature-card {
            background: var(--panel);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }

        .feature-card:hover {
            transform: translateY(-6px) scale(1.01);
            border-color: rgba(61, 126, 255, 0.38);
            box-shadow: 0 18px 48px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(61, 126, 255, 0.12);
        }

        .feature-media {
            position: relative;
            overflow: hidden;
            aspect-ratio: 4 / 3;
            background: #0C111B;
            border-radius: 0;
        }

        .feature-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }

        .feature-card:hover .feature-media img {
            transform: scale(1.04);
        }

        .feature-chip {
            position: absolute;
            left: 16px;
            top: 16px;
            background: rgba(11, 15, 23, 0.65);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: #fff;
            padding: 5px 12px;
            border-radius: 999px;
            font-size: 12px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            letter-spacing: 0.03em;
        }

        .feature-body {
            padding: 24px;
        }

        .feature-body h3 {
            font-size: 22px;
            font-weight: 700;
            margin: 0 0 10px;
        }

        .feature-body p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .feature-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 14px;
        }

        .feature-meta span {
            font-size: 13px;
            color: var(--faint);
        }

        .meta-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
            background: none;
            border: 0;
            padding: 0;
        }

        .meta-link i {
            transition: transform 0.2s ease;
        }

        .meta-link:hover {
            color: var(--accent);
        }

        .meta-link:hover i {
            transform: translateX(3px);
        }

        .row-cols-md-2 > .col {
            margin-bottom: 24px;
        }

        @media (max-width: 767.98px) {
            .feature-body {
                padding: 20px;
            }
        }

        /* ========== Scenarios ========== */
        .scenario-section .row {
            margin-top: 12px;
        }

        .scenario-card {
            height: 100%;
            background: var(--panel);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
        }

        .scenario-card:hover {
            border-color: rgba(61, 126, 255, 0.25);
            background: #141d2e;
            transform: translateY(-4px);
        }

        .scenario-icon {
            width: 54px;
            height: 54px;
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(61, 126, 255, 0.15);
            border: 1px solid rgba(61, 126, 255, 0.22);
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 20px;
        }

        .scenario-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 0 0 10px;
        }

        .scenario-card p {
            color: var(--muted);
            font-size: 15px;
            margin: 0;
            line-height: 1.8;
        }

        /* ========== Process ========== */
        .process-section {
            background: var(--bg-soft);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .step-card {
            position: relative;
            height: 100%;
            background: var(--panel-deep);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            overflow: hidden;
            transition: border-color 0.25s ease;
        }

        .step-card::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(180deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity 0.25s ease;
        }

        .step-card:hover {
            border-color: rgba(61, 126, 255, 0.25);
        }

        .step-card:hover::before {
            opacity: 1;
        }

        .step-index {
            font-size: 14px;
            color: var(--accent);
            font-weight: 700;
            letter-spacing: 0.08em;
            margin-bottom: 10px;
        }

        .step-icon {
            width: 44px;
            height: 44px;
            background: rgba(32, 225, 176, 0.1);
            color: var(--accent);
            border: 1px solid rgba(32, 225, 176, 0.2);
            border-radius: 13px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 17px;
            margin-bottom: 18px;
        }

        .step-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 0 0 8px;
        }

        .step-card p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.75;
            margin: 0;
        }

        /* ========== Reviews ========== */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .review-bubble {
            position: relative;
            height: 100%;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-lg);
            padding: 24px;
            color: var(--text);
            backdrop-filter: blur(18px) saturate(140%);
            -webkit-backdrop-filter: blur(18px) saturate(140%);
            transition: background 0.25s ease, border-color 0.25s ease;
            box-shadow: 0 8px 30px rgba(0, 20, 60, 0.2);
        }

        .review-bubble:hover {
            background: rgba(255, 255, 255, 0.09);
            border-color: rgba(255, 255, 255, 0.18);
        }

        .review-bubble::after {
            content: "";
            position: absolute;
            bottom: -10px;
            left: 30px;
            width: 0;
            height: 0;
            border: 10px solid transparent;
            border-top-color: rgba(255, 255, 255, 0.08);
        }

        .review-stars {
            display: flex;
            align-items: center;
            gap: 3px;
            color: var(--accent);
            font-size: 13px;
            margin-bottom: 12px;
        }

        .review-text {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text);
            margin: 0 0 16px;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--muted);
        }

        .review-user i {
            color: var(--accent);
            font-size: 14px;
        }

        @media (max-width: 767.98px) {
            .review-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== Updates Strip ========== */
        .updates-strip {
            background:
                radial-gradient(600px 180px at 20% 20%, rgba(61, 126, 255, 0.12), transparent 70%),
                var(--bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .updates-strip .updates-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 18px;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(255, 255, 255, 0.07);
            border-radius: 18px;
            padding: 24px 28px;
        }

        .updates-inner h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 0 0 6px;
        }

        .updates-inner p {
            color: var(--muted);
            font-size: 15px;
            margin: 0;
            max-width: 720px;
        }

        .updates-inner i {
            color: var(--accent);
            margin-right: 6px;
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--bg-soft);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .faq-col {
            max-width: 860px;
            margin: 0 auto;
        }

        .accordion-item {
            background: var(--panel);
            border: 1px solid var(--border);
            border-radius: 16px !important;
            margin-bottom: 12px;
            overflow: hidden;
        }

        .accordion-item:first-of-type,
        .accordion-item:last-of-type {
            border-radius: 16px !important;
        }

        .accordion-button {
            background: var(--panel);
            color: var(--text) !important;
            font-size: 16px;
            font-weight: 600;
            padding: 18px 20px;
            border: 0;
            box-shadow: none !important;
            transition: background 0.2s ease;
        }

        .accordion-button::after {
            content: "+";
            background: none !important;
            font-family: var(--font-main);
            font-size: 24px;
            font-weight: 300;
            width: auto;
            height: auto;
            color: var(--accent);
            margin-left: auto;
            transition: transform 0.2s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .accordion-button:not(.collapsed) {
            background: rgba(61, 126, 255, 0.09);
        }

        .accordion-button:not(.collapsed)::after {
            content: "×";
            transform: none;
        }

        .accordion-button:hover {
            background: rgba(255, 255, 255, 0.04);
        }

        .accordion-button:focus-visible {
            outline: 2px solid rgba(61, 126, 255, 0.6);
            outline-offset: -2px;
        }

        .accordion-body {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            padding: 0 20px 20px;
        }

        /* ========== CTA ========== */
        .cta-section {
            position: relative;
            padding: 96px 0;
            background:
                radial-gradient(500px 260px at 50% 100%, rgba(32, 225, 176, 0.1), transparent 70%),
                radial-gradient(700px 300px at 50% 0%, rgba(61, 126, 255, 0.22), transparent 70%),
                linear-gradient(180deg, rgba(11, 15, 23, 0.4), rgba(11, 15, 23, 0.5)),
                url("/assets/images/backpic/back-3.webp");
            background-size: cover;
            background-position: center;
        }

        .cta-box {
            position: relative;
            text-align: center;
            max-width: 820px;
            margin: 0 auto;
        }

        .cta-box h2 {
            font-size: clamp(30px, 3.6vw, 44px);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
        }

        .cta-box p {
            color: var(--muted);
            max-width: 640px;
            margin: 16px auto 28px;
            font-size: 16px;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* ========== Footer ========== */
        .footer-main {
            background: #0A0E16;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 72px 0 0;
        }

        .footer-main .logo-mark {
            width: 34px;
            height: 34px;
            font-size: 14px;
        }

        .footer-main .brand-text {
            font-size: 1.2rem;
            font-weight: 800;
            color: #fff;
        }

        .footer-main p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.8;
            margin-top: 14px;
        }

        .footer-main h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: var(--muted);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            padding: 4px 0;
            transition: color 0.2s ease;
        }

        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .footer-bottom {
            margin-top: 56px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 22px 0;
        }

        .footer-bottom p {
            margin: 0;
            font-size: 12px;
            color: var(--faint);
        }

        @media (max-width: 767.98px) {
            .footer-main {
                padding: 56px 0 0;
            }

            .footer-bottom {
                margin-top: 34px;
            }
        }

        /* ========== Extra Helpers ========== */
        .divider-glow {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(61, 126, 255, 0.35), rgba(32, 225, 176, 0.35), transparent);
            border: none;
            margin: 0;
            opacity: 1;
        }

        .back-to-home {
            background: var(--bg);
            text-align: center;
            padding: 40px 0;
        }

        .back-to-home a {
            color: var(--muted);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: color 0.2s ease, gap 0.2s ease;
        }

        .back-to-home a:hover {
            color: var(--accent);
            gap: 12px;
        }

        @media (max-width: 575.98px) {
            .section-head-row {
                margin-bottom: 28px;
            }

            .feature-media {
                aspect-ratio: 4 / 3;
            }

            .scenario-card,
            .step-card {
                padding: 20px;
            }

            .updates-strip .updates-inner {
                padding: 20px;
            }

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

/* roulang page: category2 */
:root {
  --bg: #0B0F17;
  --surface: #0E1420;
  --surface-2: #121A28;
  --text-primary: #F2F6FC;
  --text-secondary: #9AA7BC;
  --text-muted: #5E6B80;
  --brand: #3D7EFF;
  --brand-2: #2F6BFF;
  --cyan: #20E1B0;
  --warning: #FFB02E;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(61, 126, 255, 0.35);
  --radius: 16px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow: 0 16px 40px rgba(0, 0, 0, 0.28);
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 12px;
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.3;
}

p {
  margin: 0 0 18px;
  color: var(--text-secondary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: all .25s ease;
}

ul {
  padding: 0;
  margin: 0;
  list-style: none;
}

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

button, input, textarea {
  font-family: inherit;
  border: 0;
}

button {
  background: none;
}

.container {
  max-width: 1200px;
}

[direction] {
  scroll-margin-top: 120px;
}

section[id], div[id] {
  scroll-margin-top: 120px;
}

::selection {
  background: rgba(61, 126, 255, .3);
  color: #fff;
}

.section-block {
  padding: 96px 0;
}

.section-head {
  margin-bottom: 48px;
}

.section-head .kicker {
  margin-bottom: 18px;
}

.section-title {
  font-size: clamp(28px, 3vw, 38px);
  letter-spacing: .01em;
}

.section-subcopy {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 720px;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border: 1px solid rgba(32, 225, 176, .35);
  background: rgba(32, 225, 176, .08);
  color: var(--cyan);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
}

.kicker::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px rgba(32, 225, 176, .8);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1050;
  border-bottom: 1px solid var(--border);
  background: rgba(11, 15, 23, .88);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
}

.site-header .navbar {
  min-height: 76px;
  padding: 0;
}

.navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0;
  font-weight: 800;
}

.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(61, 126, 255, .25), rgba(32, 225, 176, .15));
  border: 1px solid rgba(61, 126, 255, .35);
  color: var(--cyan);
  font-size: 17px;
  box-shadow: 0 0 18px rgba(61, 126, 255, .18);
}

.brand-text {
  font-size: 21px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.01em;
}

.navbar-nav {
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 14px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  border-radius: 10px;
}

.nav-link:hover {
  color: #fff;
}

.nav-link.active {
  color: #fff;
}

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--brand), var(--cyan));
  box-shadow: 0 0 10px rgba(61, 126, 255, .6);
}

.navbar-toggler {
  border: 0;
  color: #fff;
  font-size: 22px;
  padding: 8px 10px;
}

.navbar-toggler:focus {
  box-shadow: none;
  outline: 2px solid rgba(61, 126, 255, .6);
  outline-offset: 3px;
  border-radius: 8px;
}

.header-cta {
  margin-left: 12px;
  padding: 9px 20px;
  font-size: 14px;
}

.mobile-cta {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 44px;
  padding: 0 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  transition: transform .25s, box-shadow .25s, background .25s, border-color .25s, color .25s;
}

.btn-brand {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  border: 1px solid transparent;
  box-shadow: 0 0 0 4px rgba(61, 126, 255, .12), 0 10px 30px rgba(61, 126, 255, .22);
}

.btn-brand:hover {
  color: #fff;
  background: linear-gradient(135deg, #5591ff, #3d7dff);
  transform: translateY(-2px);
  box-shadow: 0 0 0 5px rgba(61, 126, 255, .16), 0 16px 36px rgba(61, 126, 255, .3);
}

.btn-brand:active {
  transform: translateY(0);
  box-shadow: 0 0 0 4px rgba(61, 126, 255, .12), 0 6px 16px rgba(61, 126, 255, .18);
}

.btn-ghost {
  background: rgba(255, 255, 255, .04);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: #fff;
  border-color: rgba(61, 126, 255, .55);
  box-shadow: 0 0 20px rgba(61, 126, 255, .12);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, .22);
}

.btn-outline:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

.btn:focus-visible {
  outline: 2px solid rgba(61, 126, 255, .65);
  outline-offset: 3px;
}

.btn-sm {
  min-height: 38px;
  padding: 0 18px;
  font-size: 14px;
}

.notice-hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 96px;
}

.notice-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-position: center;
  background-size: cover;
  opacity: .16;
}

.notice-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 420px at 20% 10%, rgba(61, 126, 255, .25), transparent 60%),
              radial-gradient(520px 360px at 83% 24%, rgba(32, 225, 176, .14), transparent 60%),
              linear-gradient(180deg, rgba(11, 15, 23, .82) 0%, rgba(11, 15, 23, .74) 50%, rgba(11, 15, 23, .97) 100%);
}

.notice-hero .container {
  position: relative;
  z-index: 2;
}

.hero-copy {
  max-width: 620px;
}

.hero-copy .kicker {
  margin-bottom: 18px;
}

.hero-title {
  font-size: clamp(42px, 5vw, 58px);
  font-weight: 800;
  line-height: 1.15;
  color: #F7FAFF;
  text-shadow: 0 4px 26px rgba(0, 0, 0, .35);
}

.hero-lead {
  font-size: 18px;
  line-height: 1.85;
  color: rgba(224, 232, 248, .88);
  max-width: 560px;
}

.hero-note {
  margin-top: 22px;
  font-size: 14px;
  color: var(--text-muted);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.update-alert-card {
  max-width: 430px;
  margin-left: auto;
  padding: 32px;
  border-radius: 28px;
  background: linear-gradient(145deg, rgba(255, 255, 255, .09), rgba(255, 255, 255, .03));
  border: 1px solid rgba(255, 255, 255, .12);
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  box-shadow: 0 24px 60px rgba(0, 18, 50, .32);
}

.update-alert-card h3 {
  font-size: 22px;
  line-height: 1.4;
}

.alert-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.alert-label {
  color: var(--cyan);
  font-weight: 600;
  font-size: 14px;
}

.update-tag {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  background: rgba(61, 126, 255, .15);
  color: #bcd4ff;
  border: 1px solid rgba(61, 126, 255, .35);
  border-radius: 999px;
  font-size: 13px;
}

.alert-bottom {
  margin-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  border-top: 1px solid rgba(255, 255, 255, .09);
  padding-top: 20px;
}

.alert-bottom .update-tag {
  background: rgba(32, 225, 176, .12);
  color: var(--cyan);
  border-color: rgba(32, 225, 176, .28);
}

.tag-line {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
}

.tag-line span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 14px;
}

.tag-line i {
  color: var(--cyan);
  font-size: 13px;
}

.reason-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
  height: 100%;
  transition: transform .3s, border-color .3s, box-shadow .3s;
}

.reason-card:hover {
  transform: translateY(-5px);
  border-color: rgba(61, 126, 255, .4);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .35);
}

.reason-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  border-radius: 14px;
  background: rgba(61, 126, 255, .14);
  border: 1px solid rgba(61, 126, 255, .25);
  color: var(--cyan);
  font-size: 20px;
}

.reason-card h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.reason-card p {
  font-size: 15px;
  margin-bottom: 0;
}

.version-timeline {
  background: var(--surface);
  border-top: 1px solid rgba(255, 255, 255, .02);
}

.timeline-wrap {
  position: relative;
}

.timeline-row {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-bottom: 22px;
  padding: 26px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform .3s, border-color .3s, box-shadow .3s;
}

.timeline-row:last-child {
  margin-bottom: 0;
}

.timeline-row:hover {
  border-color: rgba(61, 126, 255, .45);
  transform: translateX(4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .28);
}

.timeline-thumb {
  width: 190px;
  min-width: 190px;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, .08);
}

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

.timeline-main {
  flex: 1;
}

.timeline-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.timeline-main h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.timeline-main p {
  margin-bottom: 0;
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 640px;
}

.timeline-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(32, 225, 176, .12);
  color: var(--cyan);
  font-size: 13px;
}

.timeline-version {
  flex: none;
  width: 76px;
  text-align: center;
  font-weight: 800;
  font-size: 22px;
  letter-spacing: .01em;
  color: rgba(61, 126, 255, .28);
}

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

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .035);
  backdrop-filter: blur(12px);
}

.check-item i {
  flex: none;
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(61, 126, 255, .12);
  color: #9bbdff;
}

.check-item h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.check-item p {
  margin-bottom: 0;
  font-size: 15px;
}

.step-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.step-item {
  position: relative;
  text-align: left;
  padding: 30px 24px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  min-height: 200px;
}

.step-num {
  font-size: 44px;
  line-height: 1;
  font-weight: 800;
  display: block;
  margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(61, 126, 255, .4), rgba(32, 225, 176, .4));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.step-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.step-item p {
  margin-bottom: 0;
  font-size: 15px;
  color: var(--text-secondary);
}

.review-section {
  position: relative;
  overflow: hidden;
}

.review-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 300px at 80% 20%, rgba(32, 225, 176, .1), transparent 60%);
  pointer-events: none;
}

.review-card {
  position: relative;
  height: 100%;
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, rgba(255, 255, 255, .08), rgba(255, 255, 255, .02));
  border: 1px solid rgba(255, 255, 255, .12);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
}

.review-card::after {
  content: "";
  position: absolute;
  left: 38px;
  bottom: -8px;
  width: 16px;
  height: 16px;
  background: inherit;
  border-right: 1px solid rgba(255, 255, 255, .1);
  border-bottom: 1px solid rgba(255, 255, 255, .1);
  transform: rotate(45deg);
}

.review-stars {
  display: flex;
  gap: 4px;
  color: var(--warning);
  margin-bottom: 16px;
  font-size: 14px;
}

.review-card p {
  font-size: 15px;
  color: var(--text-primary);
  margin-bottom: 18px;
}

.review-user {
  font-size: 14px;
  color: var(--text-secondary);
}

.faq-item {
  margin-bottom: 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color .3s, box-shadow .3s;
}

.faq-item:has([aria-expanded="true"]) {
  border-color: rgba(61, 126, 255, .4);
  box-shadow: 0 0 20px rgba(61, 126, 255, .08);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 14px;
  padding: 20px 24px;
  background: transparent;
  color: var(--text-primary);
  font-size: 17px;
  font-weight: 600;
  text-align: left;
}

.faq-q:hover {
  color: #fff;
}

.faq-q i {
  color: var(--cyan);
  font-size: 16px;
  flex: none;
  transition: transform .3s;
}

.faq-q[aria-expanded="true"] i {
  transform: rotate(45deg);
}

.faq-a {
  padding: 0 24px 22px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.85;
}

.cta-brand {
  position: relative;
  overflow: hidden;
  padding: 72px 32px;
  border-radius: 30px;
  background: linear-gradient(120deg, rgba(47, 107, 255, .18), rgba(32, 225, 176, .1)), var(--surface-2);
  border: 1px solid rgba(61, 126, 255, .3);
  text-align: center;
}

.cta-brand::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 620px;
  height: 280px;
  transform: translate(-50%, -50%);
  background: radial-gradient(closest-side, rgba(61, 126, 255, .16), transparent);
  pointer-events: none;
  animation: pulseGlow 3s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { opacity: .45; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: .9; transform: translate(-50%, -50%) scale(1.08); }
}

.cta-brand h2 {
  position: relative;
  font-size: clamp(30px, 3.6vw, 42px);
  color: #fff;
}

.cta-brand p {
  position: relative;
  margin: 0 auto 30px;
  max-width: 620px;
  color: rgba(226, 234, 248, .86);
  font-size: 17px;
}

.cta-actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

.footer-main {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 72px 0 28px;
  position: relative;
  z-index: 2;
}

.footer-main p {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 320px;
}

.footer-main h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
  color: #fff;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.footer-links a:hover {
  color: var(--cyan);
}

.footer-links i {
  width: 16px;
  text-align: center;
  color: var(--text-muted);
  transition: color .2s;
}

.footer-links a:hover i {
  color: var(--cyan);
}

.footer-bottom {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
}

.mobile-download-bar {
  display: none;
}

@media (max-width: 991.98px) {
  .site-header .navbar {
    min-height: 64px;
  }

  .mobile-cta {
    display: block;
    padding: 18px 0 12px;
  }

  .header-cta {
    display: none;
  }

  #mainNav {
    margin-top: 10px;
    padding: 8px 18px 18px;
    background: rgba(11, 15, 23, .97);
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 18px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, .42);
  }

  #mainNav .navbar-nav {
    align-items: stretch;
    width: 100%;
    gap: 4px;
    padding-top: 12px;
  }

  #mainNav .nav-link {
    display: block;
    padding: 13px 10px;
    font-size: 16px;
  }

  #mainNav .nav-link.active::after {
    left: 10px;
    right: auto;
    width: 32px;
  }

  .mobile-download-bar {
    display: block;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1070;
    padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
    background: rgba(11, 15, 23, .94);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-top: 1px solid rgba(61, 126, 255, .18);
  }

  .mobile-download-bar a {
    width: 100%;
  }

  body {
    padding-bottom: 70px;
  }

  .section-block {
    padding: 64px 0;
  }

  .notice-hero {
    padding: 70px 0 72px;
  }

  .update-alert-card {
    margin: 42px auto 0;
    max-width: 480px;
  }

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

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

  .timeline-row {
    align-items: flex-start;
  }
}

@media (max-width: 767.98px) {
  .notice-hero {
    padding: 56px 0 56px;
  }

  .hero-title {
    font-size: 38px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .update-alert-card {
    padding: 26px 22px;
  }

  .timeline-row {
    flex-direction: column;
    padding: 18px;
  }

  .timeline-thumb {
    width: 100%;
    min-width: 0;
    aspect-ratio: 16 / 7;
  }

  .timeline-version {
    width: auto;
    text-align: left;
  }

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

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

  .section-title {
    font-size: 30px;
  }

  .footer-main {
    padding-top: 56px;
  }
}

@media (max-width: 575.98px) {
  .navbar-brand .brand-text {
    font-size: 18px;
  }

  .logo-mark {
    width: 32px;
    height: 32px;
  }

  .hero-title {
    font-size: 33px;
  }

  .hero-btns {
    width: 100%;
  }

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

  .update-alert-card h3 {
    font-size: 19px;
  }

  .section-title {
    font-size: 27px;
  }

  .faq-q {
    font-size: 16px;
    padding: 18px;
  }

  .faq-a {
    padding: 0 18px 18px;
  }

  .cta-brand {
    padding: 48px 20px;
    border-radius: 24px;
  }

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

/* roulang page: category3 */
:root {
      --page-bg: #0B0F17;
      --surface: #0E1420;
      --surface-2: #111A2B;
      --card-bg: rgba(255, 255, 255, 0.03);
      --border: rgba(255, 255, 255, 0.08);
      --border-strong: rgba(255, 255, 255, 0.14);
      --text: #F2F6FC;
      --muted: #9AA7BC;
      --weak: #5E6B80;
      --primary: #3D7EFF;
      --primary-soft: rgba(61, 126, 255, 0.12);
      --cyan: #20E1B0;
      --cyan-soft: rgba(32, 225, 176, 0.12);
      --amber: #FFB02E;
      --danger: #E5484D;
      --radius-sm: 12px;
      --radius-md: 16px;
      --radius-lg: 20px;
      --radius-xl: 28px;
      --radius-pill: 999px;
      --shadow-card: 0 12px 32px rgba(0, 0, 0, 0.35);
      --shadow-glow: 0 0 0 4px rgba(61, 126, 255, 0.12), 0 8px 30px rgba(61, 126, 255, 0.28);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    html {
      scroll-behavior: smooth;
    }

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

    body {
      margin: 0;
      font-family: var(--font-sans);
      background: var(--page-bg);
      color: var(--text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    body .container {
      max-width: 1200px;
    }

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

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

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

    :focus-visible {
      outline: 2px solid rgba(61, 126, 255, 0.65);
      outline-offset: 3px;
      border-radius: 4px;
    }

    /* ---------- 按钮与基础组件 ---------- */
    .btn-brand {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      border: none;
      background: linear-gradient(135deg, #3D7EFF 0%, #2A6BFF 100%);
      color: #fff;
      font-weight: 600;
      padding: 0.72rem 1.5rem;
      border-radius: var(--radius-pill);
      box-shadow: var(--shadow-glow);
      transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
    }

    .btn-brand:hover {
      background: linear-gradient(135deg, #4D8EFF 0%, #3D7EFF 100%);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 0 0 4px rgba(61, 126, 255, 0.18), 0 14px 36px rgba(61, 126, 255, 0.35);
    }

    .btn-brand:active {
      transform: translateY(0);
      box-shadow: 0 0 0 2px rgba(61, 126, 255, 0.22), 0 6px 20px rgba(61, 126, 255, 0.2);
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.14);
      color: var(--text);
      font-weight: 600;
      padding: 0.72rem 1.5rem;
      border-radius: var(--radius-pill);
      transition: border-color 0.22s ease, color 0.22s ease, background 0.22s ease, transform 0.22s ease;
    }

    .btn-ghost:hover {
      border-color: var(--primary);
      color: #fff;
      background: rgba(61, 126, 255, 0.08);
      transform: translateY(-2px);
    }

    .btn-ghost:active {
      transform: translateY(0);
    }

    .btn-lg {
      min-height: 50px;
      padding-left: 1.8rem;
      padding-right: 1.8rem;
      font-size: 1.05rem;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--cyan);
      font-weight: 600;
      font-size: 14px;
      letter-spacing: 0.02em;
      margin-bottom: 14px;
    }

    .eyebrow::before {
      content: "";
      width: 18px;
      height: 2px;
      background: linear-gradient(90deg, var(--primary), var(--cyan));
      border-radius: 99px;
    }

    .section-head {
      margin-bottom: 48px;
    }

    .section-head h2 {
      font-size: clamp(28px, 3vw, 38px);
      font-weight: 700;
      line-height: 1.3;
      margin: 10px 0 14px;
    }

    .section-head p {
      color: var(--muted);
      font-size: 16px;
      margin: 0 auto;
    }

    .section-head.center {
      text-align: center;
    }

    .section-head.center .eyebrow {
      justify-content: center;
    }

    .section-head.center .eyebrow::after {
      content: "";
      width: 18px;
      height: 2px;
      background: linear-gradient(90deg, var(--cyan), var(--primary));
      border-radius: 99px;
    }

    .section-head.left .eyebrow {
      justify-content: flex-start;
    }

    /* ---------- 导航 ---------- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(11, 15, 23, 0.86);
      -webkit-backdrop-filter: blur(18px) saturate(140%);
      backdrop-filter: blur(18px) saturate(140%);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .site-header .navbar {
      min-height: 76px;
      padding-top: 0;
      padding-bottom: 0;
    }

    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-weight: 700;
      font-size: 1.28rem;
      color: var(--text);
      letter-spacing: 0.01em;
    }

    .brand-logo:hover {
      color: #fff;
    }

    .logo-mark {
      width: 38px;
      height: 38px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #3D7EFF, #20E1B0);
      color: #fff;
      border-radius: 12px;
      font-size: 18px;
      box-shadow: 0 8px 24px rgba(61, 126, 255, 0.35);
    }

    .brand-text {
      white-space: nowrap;
    }

    .navbar-nav {
      gap: 6px;
      margin: 0 auto;
    }

    .navbar-nav .nav-link {
      color: var(--muted);
      font-weight: 500;
      font-size: 15px;
      padding: 0.7rem 0.9rem !important;
      position: relative;
      transition: color 0.2s ease;
      border-radius: 8px;
    }

    .navbar-nav .nav-link:hover {
      color: var(--text);
    }

    .navbar-nav .nav-link.active {
      color: #fff;
    }

    .navbar-nav .nav-link.active::after {
      content: "";
      position: absolute;
      left: 12px;
      right: 12px;
      bottom: 0;
      height: 2px;
      background: linear-gradient(90deg, var(--primary), var(--cyan));
      border-radius: 99px;
    }

    .header-cta {
      margin-left: 16px;
    }

    .mobile-cta {
      display: none;
      margin-top: 18px;
    }

    .mobile-cta .btn-brand {
      width: 100%;
    }

    .navbar-toggler {
      border: 1px solid rgba(255, 255, 255, 0.16);
      background: rgba(255, 255, 255, 0.04);
      color: var(--text);
      width: 46px;
      height: 46px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 12px;
      font-size: 18px;
      padding: 0;
    }

    .navbar-toggler:hover {
      border-color: rgba(255, 255, 255, 0.3);
    }

    .navbar-toggler:focus,
    .navbar-toggler:focus-visible {
      box-shadow: 0 0 0 4px rgba(61, 126, 255, 0.25);
      outline: none;
    }

    @media (max-width: 991.98px) {
      .site-header .navbar {
        min-height: 64px;
      }

      .header-cta {
        display: none;
      }

      .navbar-collapse {
        background: linear-gradient(145deg, rgba(13, 19, 30, 0.97), rgba(10, 14, 23, 0.98));
        border: 1px solid rgba(255, 255, 255, 0.09);
        border-radius: 0 0 20px 20px;
        padding: 18px 20px 22px;
        margin-top: 6px;
        box-shadow: 0 24px 60px rgba(0, 0, 0, 0.36);
        -webkit-backdrop-filter: blur(20px);
        backdrop-filter: blur(20px);
      }

      .navbar-nav {
        gap: 4px;
        margin: 0;
        width: 100%;
      }

      .navbar-nav .nav-link {
        display: block;
        padding: 0.9rem 0.8rem !important;
        font-size: 16px;
        border-radius: 12px;
      }

      .navbar-nav .nav-link:hover {
        background: rgba(255, 255, 255, 0.05);
      }

      .navbar-nav .nav-link.active::after {
        left: 4px;
        right: auto;
        width: 2px;
        height: 20px;
        top: 50%;
        bottom: auto;
        transform: translateY(-50%);
      }

      .mobile-cta {
        display: block;
      }
    }

    /* ---------- 页脚 ---------- */
    .footer-main {
      background: #0A0E17;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 76px;
      margin-top: 96px;
    }

    .footer-main h4 {
      color: var(--text);
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 18px;
    }

    .footer-main p {
      color: var(--muted);
      font-size: 14px;
    }

    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .footer-links li + li {
      margin-top: 10px;
    }

    .footer-links a {
      color: var(--muted);
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 7px;
      transition: color 0.2s ease;
    }

    .footer-links a:hover {
      color: #fff;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      margin-top: 58px;
      padding: 24px 0 26px;
    }

    .footer-bottom p {
      color: #5E6B80;
      font-size: 12px;
      margin: 0;
    }

    .footer-bottom a {
      color: #5E6B80;
    }

    .footer-bottom a:hover {
      color: var(--muted);
    }

    @media (max-width: 575.98px) {
      .footer-main {
        padding-top: 56px;
        margin-top: 64px;
      }

      .footer-bottom p {
        line-height: 1.8;
      }
    }

    /* ---------- 下载帮助 Hero ---------- */
    .download-hero {
      position: relative;
      padding: 72px 0 88px;
      overflow: hidden;
      background:
        radial-gradient(circle at 80% 12%, rgba(61, 126, 255, 0.2), transparent 34%),
        radial-gradient(circle at 8% 88%, rgba(32, 225, 176, 0.1), transparent 28%),
        linear-gradient(180deg, #0B0F17 0%, #0E1420 100%);
    }

    .download-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      pointer-events: none;
      background-image: url("/assets/images/backpic/back-2.png");
      background-size: cover;
      background-position: center;
      opacity: 0.14;
      mix-blend-mode: screen;
    }

    .hero-panel {
      position: relative;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-xl);
      box-shadow: 0 24px 70px rgba(0, 0, 0, 0.3);
      overflow: hidden;
      transition: border-color 0.3s ease;
    }

    .hero-panel:hover {
      border-color: rgba(255, 255, 255, 0.17);
    }

    .hero-panel__media {
      min-height: 320px;
      max-height: 520px;
      height: 100%;
      position: relative;
    }

    .hero-panel__media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      position: absolute;
      inset: 0;
    }

    .hero-panel__media::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(11, 15, 23, 0.1) 0%, rgba(11, 15, 23, 0.55) 100%);
    }

    .hero-panel__body {
      padding: 48px 48px 44px;
    }

    .hero-panel__body h1 {
      font-size: clamp(36px, 4.4vw, 58px);
      font-weight: 800;
      line-height: 1.15;
      margin: 6px 0 20px;
      letter-spacing: -0.02em;
    }

    .hero-panel__body .lead-text {
      color: var(--muted);
      font-size: 16px;
      line-height: 1.9;
      max-width: 540px;
      margin-bottom: 28px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 24px;
    }

    .hero-note {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
      color: var(--muted);
      font-size: 13px;
    }

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

    .hero-note i {
      color: var(--cyan);
    }

    @media (max-width: 991.98px) {
      .hero-panel__media {
        min-height: 260px;
        order: 2;
      }

      .hero-panel__media img {
        position: relative;
      }

      .hero-panel__body {
        padding: 32px 28px 34px;
      }
    }

    @media (max-width: 575.98px) {
      .download-hero {
        padding: 48px 0 64px;
      }

      .hero-panel__body {
        padding: 26px 20px 30px;
      }

      .hero-panel__media {
        min-height: 200px;
      }

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

    /* ---------- 参数信息条 ---------- */
    .info-strip {
      padding: 20px 0 0;
      margin-top: -24px;
      position: relative;
      z-index: 2;
    }

    .info-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
    }

    .info-bar__item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 20px 18px;
      min-height: 104px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .info-bar__item i {
      font-size: 20px;
      color: var(--primary);
      margin-bottom: 8px;
    }

    .info-bar__item strong {
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
    }

    .info-bar__item span {
      font-size: 13px;
      color: var(--muted);
      margin-top: 2px;
    }

    @media (max-width: 991.98px) {
      .info-bar {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 575.98px) {
      .info-bar {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
      }

      .info-bar__item {
        padding: 14px 12px;
        min-height: 92px;
      }
    }

    /* ---------- 下载入口横条 ---------- */
    .channel-section {
      padding: 96px 0;
      background: var(--page-bg);
    }

    .download-row {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-top: 28px;
      transition: border-color 0.28s ease, box-shadow 0.28s ease, transform 0.28s ease;
    }

    .download-row:hover {
      border-color: rgba(61, 126, 255, 0.3);
      box-shadow: 0 16px 46px rgba(0, 0, 0, 0.3);
      transform: translateY(-2px);
    }

    .download-row__media {
      position: relative;
    }

    .download-row__media img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
    }

    .platform-badge {
      position: absolute;
      top: 16px;
      left: 16px;
      display: inline-flex;
      align-items: center;
      gap: 7px;
      background: rgba(11, 15, 23, 0.75);
      color: #fff;
      border: 1px solid rgba(255, 255, 255, 0.16);
      padding: 7px 14px;
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 600;
      -webkit-backdrop-filter: blur(10px);
      backdrop-filter: blur(10px);
    }

    .download-row__tag {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      background: var(--primary-soft);
      color: #9DBBFF;
      border: 1px solid rgba(61, 126, 255, 0.2);
      padding: 6px 13px;
      border-radius: var(--radius-pill);
      font-size: 13px;
      margin-bottom: 14px;
    }

    .download-row__body h3 {
      font-size: 24px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 14px;
    }

    .download-row__body p {
      color: var(--muted);
      font-size: 15px;
      line-height: 1.85;
      margin-bottom: 20px;
      max-width: 640px;
    }

    .param-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-bottom: 24px;
    }

    .param-grid dl {
      margin: 0;
      background: rgba(61, 126, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.05);
      border-radius: var(--radius-sm);
      padding: 14px 16px;
      min-width: 0;
    }

    .param-grid dt {
      font-size: 12px;
      color: var(--weak);
      margin-bottom: 4px;
    }

    .param-grid dd {
      font-size: 14px;
      color: var(--text);
      margin: 0;
      line-height: 1.5;
      word-break: break-word;
    }

    @media (max-width: 575.98px) {
      .channel-section {
        padding: 64px 0;
      }

      .download-row {
        padding: 18px;
      }

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

      .download-row__body h3 {
        font-size: 21px;
      }
    }

    /* ---------- 安装流程 ---------- */
    .process-section {
      background: var(--surface);
      padding: 96px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }

    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .step-card {
      background: #0E1420;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px 24px 26px;
      height: 100%;
      position: relative;
      overflow: hidden;
      transition: border-color 0.28s ease, transform 0.28s ease;
    }

    .step-card:hover {
      border-color: rgba(61, 126, 255, 0.35);
      transform: translateY(-4px);
    }

    .step-card__num {
      font-size: 56px;
      font-weight: 800;
      line-height: 1;
      background: linear-gradient(135deg, #3D7EFF, #20E1B0);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      opacity: 0.55;
      margin-bottom: 20px;
      display: block;
    }

    .step-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .step-card p {
      color: var(--muted);
      font-size: 14px;
      line-height: 1.8;
      margin: 0;
    }

    @media (max-width: 991.98px) {
      .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 575.98px) {
      .process-section {
        padding: 64px 0;
      }

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

    /* ---------- 下载安全 ---------- */
    .safe-section {
      padding: 96px 0;
      background: var(--page-bg);
    }

    .safe-panel {
      background:
        linear-gradient(135deg, rgba(11, 15, 23, 0.96), rgba(14, 20, 32, 0.88)),
        url("/assets/images/backpic/back-1.webp") center / cover no-repeat;
      border: 1px solid var(--border);
      border-radius: var(--radius-xl);
      padding: 52px;
      overflow: hidden;
      position: relative;
    }

    .safe-panel__lead h2 {
      font-size: clamp(28px, 3vw, 38px);
      font-weight: 700;
      line-height: 1.3;
      margin: 10px 0 16px;
    }

    .safe-panel__lead p {
      color: var(--muted);
      line-height: 1.9;
      margin-bottom: 0;
      max-width: 440px;
    }

    .safe-list {
      display: grid;
      gap: 14px;
    }

    .safe-point {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 18px 20px;
      display: flex;
      align-items: flex-start;
      gap: 16px;
      transition: border-color 0.25s ease;
    }

    .safe-point:hover {
      border-color: rgba(255, 255, 255, 0.16);
    }

    .safe-point i {
      color: var(--cyan);
      font-size: 20px;
      margin-top: 2px;
    }

    .safe-point strong {
      display: block;
      font-size: 15px;
      margin-bottom: 4px;
    }

    .safe-point span {
      color: var(--muted);
      font-size: 13px;
      line-height: 1.7;
    }

    @media (max-width: 991.98px) {
      .safe-section {
        padding: 64px 0;
      }

      .safe-panel {
        padding: 32px 22px;
      }

      .safe-panel__lead p {
        max-width: none;
      }

      .safe-list {
        margin-top: 26px;
      }
    }

    /* ---------- FAQ ---------- */
    .faq-section {
      background: var(--surface);
      padding: 96px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
    }

    .faq-wrap {
      max-width: 860px;
      margin: 0 auto;
    }

    .accordion-item {
      background: #0E1420;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.25s ease;
    }

    .accordion-item:hover {
      border-color: rgba(255, 255, 255, 0.16);
    }

    .accordion-button {
      background: #0E1420;
      color: var(--text);
      font-size: 16px;
      font-weight: 600;
      padding: 22px 24px;
      box-shadow: none;
      line-height: 1.6;
      border-radius: 0 !important;
    }

    .accordion-button::after {
      content: "\f067";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      background-image: none;
      color: var(--cyan);
      width: 24px;
      height: 24px;
      line-height: 24px;
      text-align: center;
      transition: transform 0.25s ease;
      opacity: 0.9;
    }

    .accordion-button:not(.collapsed)::after {
      content: "\f00d";
      transform: rotate(0);
    }

    .accordion-button:not(.collapsed) {
      background: #0B0F17;
      color: #fff;
      box-shadow: none;
    }

    .accordion-button:focus,
    .accordion-button:focus-visible {
      box-shadow: inset 0 0 0 2px rgba(61, 126, 255, 0.45);
      outline: none;
    }

    .accordion-body {
      background: #0B0F17;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.85;
      padding: 4px 24px 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    @media (max-width: 575.98px) {
      .faq-section {
        padding: 64px 0;
      }

      .accordion-button {
        font-size: 15px;
        padding: 18px 16px;
      }

      .accordion-body {
        padding: 4px 16px 20px;
      }
    }

    /* ---------- CTA ---------- */
    .cta-download-section {
      padding: 96px 0 0;
      background: var(--page-bg);
    }

    .cta-box {
      position: relative;
      text-align: center;
      background:
        radial-gradient(circle at 50% 120%, rgba(61, 126, 255, 0.28), transparent 55%),
        radial-gradient(circle at 15% 10%, rgba(32, 225, 176, 0.12), transparent 40%),
        #0E1420;
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-xl);
      padding: 64px 40px;
      overflow: hidden;
    }

    .cta-box h2 {
      font-size: clamp(28px, 3.4vw, 42px);
      font-weight: 800;
      line-height: 1.25;
      margin: 12px 0 18px;
    }

    .cta-box p {
      color: var(--muted);
      max-width: 620px;
      margin: 0 auto 32px;
      font-size: 16px;
      line-height: 1.9;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
    }

    .return-home-line {
      text-align: center;
      padding: 28px 0 12px;
    }

    .return-home-line a {
      color: var(--muted);
      font-size: 14px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: color 0.2s ease;
    }

    .return-home-line a:hover {
      color: #fff;
    }

    @media (max-width: 575.98px) {
      .cta-download-section {
        padding: 64px 0 0;
      }

      .cta-box {
        padding: 44px 22px;
      }

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

    /* ---------- 通用段落重置 ---------- */
    h1,
    h2,
    h3,
    h4,
    p {
      text-wrap: pretty;
    }

    .section-pad {
      padding-top: 96px;
      padding-bottom: 96px;
    }

    @media (max-width: 767.98px) {
      .section-pad {
        padding-top: 64px;
        padding-bottom: 64px;
      }
    }