/* roulang page: index */
/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #FF7A00;
  --primary-light: #FFA04A;
  --primary-dark: #E86A00;
  --secondary: #00D4C7;
  --secondary-dark: #00B8AC;
  --bg-deep: #080B12;
  --bg-dark: #0B0F19;
  --bg-panel: #161B28;
  --bg-card: #1A2130;
  --bg-input: #121826;
  --text-main: #F5F7FA;
  --text-sub: #9AA5B5;
  --text-weak: #6B7686;
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,122,0,0.4);
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 24px;
  --shadow: 0 8px 30px rgba(0,0,0,0.35);
  --shadow-hover: 0 16px 40px rgba(0,0,0,0.5);
  --transition: all 0.3s ease;
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "Inter", "SF Mono", Consolas, monospace;
}

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

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

a { color: var(--text-main); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; display: block; border: none; }
button { font-family: inherit; border: none; cursor: pointer; background: none; color: inherit; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; }
::selection { background: rgba(255,122,0,0.3); color: #fff; }

/* Focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

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

/* ===== Preloader ribbon ===== */
.top-ribbon {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  height: 3px;
  width: 100%;
}

/* ===== Header & Nav ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(11,15,25,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 72px;
  transition: box-shadow 0.3s ease, background 0.3s ease;
}
.site-header.scrolled { box-shadow: 0 4px 30px rgba(0,0,0,0.4); background: rgba(8,11,18,0.96); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 24px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 12px; background: linear-gradient(145deg, var(--primary), var(--primary-dark)); box-shadow: 0 4px 20px rgba(255,122,0,0.35); }
.logo-icon svg { width: 22px; height: 22px; fill: #0B0F19; }
.logo-text { font-size: 20px; font-weight: 800; letter-spacing: 0.5px; color: var(--text-main); white-space: nowrap; }
.logo-text em { font-style: normal; color: var(--primary); }
.main-nav { display: flex; align-items: center; gap: 4px; flex: 1; justify-content: flex-end; }
.nav-link {
  font-size: 15px; font-weight: 500;
  color: var(--text-sub);
  padding: 8px 14px;
  border-radius: 999px;
  position: relative;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link:hover { color: var(--primary); background: rgba(255,122,0,0.08); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%;
  transform: translateX(-50%);
  width: 20px; height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}
.nav-cta {
  margin-left: 12px;
  flex-shrink: 0;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 28px;
  font-size: 15px; font-weight: 600;
  border-radius: 999px;
  transition: var(--transition);
  cursor: pointer;
  line-height: 1.4;
  border: 2px solid transparent;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px) scale(0.98); }
.btn-primary {
  background: linear-gradient(145deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 20px rgba(255,122,0,0.3);
}
.btn-primary:hover { background: linear-gradient(145deg, var(--primary-light), var(--primary)); color: #fff; box-shadow: 0 8px 30px rgba(255,122,0,0.45); transform: translateY(-2px); }
.btn-outline {
  background: transparent;
  color: var(--text-main);
  border-color: rgba(255,255,255,0.3);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(255,122,0,0.06); transform: translateY(-2px); }
.btn-lg { padding: 16px 48px; font-size: 17px; }
.btn-secondary {
  background: var(--secondary);
  color: #081018;
  box-shadow: 0 4px 20px rgba(0,212,199,0.25);
}
.btn-secondary:hover { background: var(--secondary-dark); color: #081018; box-shadow: 0 8px 30px rgba(0,212,199,0.35); transform: translateY(-2px); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; border-radius: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--text-main); border-radius: 2px; transition: var(--transition); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 991px) {
  .site-header, .header-inner { height: 60px; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute;
    top: 60px; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(8,11,18,0.98);
    padding: 16px 24px 20px;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
    display: none;
    border-radius: 0 0 16px 16px;
  }
  .main-nav.open { display: flex; }
  .nav-link { padding: 12px 16px; border-radius: 10px; font-size: 16px; }
  .nav-link.active::after { bottom: 6px; }
  .nav-cta { display: flex; margin-left: 0; width: 100%; justify-content: center; margin-top: 8px; }
  .logo-text { font-size: 18px; }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  background: linear-gradient(135deg, #0B0F19 0%, #111624 50%, #0B0F19 100%);
  overflow: hidden;
  padding: 120px 0 80px;
}
.hero-bg {
  position: absolute; inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.55;
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(11,15,25,0.9) 0%, rgba(11,15,25,0.6) 50%, rgba(11,15,25,0.88) 100%);
}
.hero-glow {
  position: absolute;
  width: 500px; height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,122,0,0.2) 0%, transparent 70%);
  top: -100px; right: -100px;
  z-index: 0;
  animation: glowPulse 6s ease-in-out infinite alternate;
}
.hero-glow-2 {
  position: absolute;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,212,199,0.12) 0%, transparent 70%);
  bottom: -80px; left: -100px;
  z-index: 0;
  animation: glowPulse 8s ease-in-out infinite alternate-reverse;
}
@keyframes glowPulse {
  0% { transform: scale(1); opacity: 0.7; }
  100% { transform: scale(1.15); opacity: 1; }
}
.hero-content { position: relative; z-index: 2; max-width: 720px; }
.hero-tagline {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 500;
  color: var(--secondary);
  background: rgba(0,212,199,0.08);
  border: 1px solid rgba(0,212,199,0.2);
  padding: 6px 18px;
  border-radius: 999px;
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}
.hero-tagline-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--secondary); animation: blink 1.5s infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.hero h1 {
  font-size: 54px; font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.hero h1 .gradient-text {
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
  background-size: 200% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 4s ease infinite;
}
@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.hero-sub {
  font-size: 18px;
  color: #C0C8D9;
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 600px;
}
.hero-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.hero-meta {
  display: flex; gap: 32px; margin-top: 50px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.hero-meta-item { display: flex; align-items: center; gap: 12px; }
.hero-meta-item .meta-num { font-size: 28px; font-weight: 800; color: var(--text-main); font-family: var(--font-mono); }
.hero-meta-item .meta-label { font-size: 13px; color: var(--text-sub); }
.hero-scroll {
  position: absolute;
  bottom: 32px; left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  color: var(--text-sub); font-size: 13px;
  cursor: pointer;
  transition: var(--transition);
  background: none; border: none;
}
.hero-scroll:hover { color: var(--primary); }
.hero-scroll-line { width: 1px; height: 40px; background: linear-gradient(to bottom, var(--primary), transparent); animation: scrollHint 2s infinite; }
@keyframes scrollHint { 0% { transform: scaleY(0.3); opacity: 0.4; } 50% { transform: scaleY(1); opacity: 1; } 100% { transform: scaleY(0.3); opacity: 0.4; } }

@media (max-width: 767px) {
  .hero { padding: 100px 0 60px; min-height: auto; }
  .hero h1 { font-size: 34px; }
  .hero-sub { font-size: 16px; }
  .hero-meta { gap: 20px; }
  .hero-meta-item .meta-num { font-size: 22px; }
  .hero-actions .btn { width: 100%; }
}

/* ===== Section base ===== */
.section { padding: 100px 0; position: relative; }
.section-panel { background: var(--bg-panel); }
.section-header { text-align: center; max-width: 680px; margin: 0 auto 60px; }
.section-header .section-eyebrow {
  display: inline-block;
  font-size: 13px; font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.section-header h2 { font-size: 34px; font-weight: 800; line-height: 1.3; margin-bottom: 14px; }
.section-header p { color: var(--text-sub); font-size: 16px; line-height: 1.8; }

@media (max-width: 767px) {
  .section { padding: 60px 0; }
  .section-header { margin-bottom: 40px; }
  .section-header h2 { font-size: 26px; }
}

/* ===== Stats Bar ===== */
.stats-bar { border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: rgba(11,15,25,0.5); padding: 40px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.stat-item { text-align: center; }
.stat-num { font-size: 40px; font-weight: 800; font-family: var(--font-mono); color: var(--text-main); line-height: 1.3; }
.stat-num span { color: var(--primary); }
.stat-label { font-size: 14px; color: var(--text-sub); margin-top: 6px; }
@media (max-width: 991px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .stat-num { font-size: 32px; }
}
@media (max-width: 767px) {
  .stats-bar { padding: 30px 0; }
}

/* ===== Play / 玩法介绍 ===== */
.play-section { background: var(--bg-dark); }
.play-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.play-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.play-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.play-card:hover { border-color: var(--border-hover); box-shadow: var(--shadow); transform: translateY(-4px); }
.play-card:hover::before { transform: scaleX(1); }
.play-step {
  font-size: 13px; font-weight: 700;
  color: var(--primary);
  background: rgba(255,122,0,0.1);
  border: 1px solid rgba(255,122,0,0.2);
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.play-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  background: linear-gradient(145deg, rgba(255,122,0,0.15), rgba(0,212,199,0.1));
  border: 1px solid rgba(255,122,0,0.2);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
  color: var(--primary);
}
.play-icon svg { width: 26px; height: 26px; }
.play-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.play-card p { font-size: 15px; color: var(--text-sub); line-height: 1.7; }

@media (max-width: 1199px) { .play-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 767px) { .play-grid { grid-template-columns: 1fr; } .play-card { padding: 28px 22px; } }

/* ===== Reward / 奖励预览 ===== */
.reward-section { background: var(--bg-panel); position: relative; overflow: hidden; }
.reward-section::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(255,122,0,0.06), transparent 70%);
  pointer-events: none;
}
.reward-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }
.reward-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
}
.reward-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--border-hover); }
.reward-card-lg { grid-column: span 2; grid-row: span 2; display: flex; flex-direction: column; }
.reward-card-img { position: relative; overflow: hidden; aspect-ratio: 16/10; }
.reward-card-lg .reward-card-img { aspect-ratio: auto; flex: 1; min-height: 280px; }
.reward-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.reward-card:hover .reward-card-img img { transform: scale(1.05); }
.reward-card-img::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(11,15,25,0.85), transparent 60%);
}
.reward-badge {
  position: absolute; top: 16px; left: 16px;
  z-index: 2;
  font-size: 13px; font-weight: 600;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text-main);
  display: inline-flex; align-items: center; gap: 6px;
}
.reward-badge.rare { color: var(--primary); border-color: rgba(255,122,0,0.4); background: rgba(255,122,0,0.15); }
.reward-badge.hot { color: var(--secondary); border-color: rgba(0,212,199,0.4); background: rgba(0,212,199,0.1); }
.reward-card-body { padding: 24px; position: relative; }
.reward-card-title { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.reward-card-lg .reward-card-title { font-size: 26px; }
.reward-card-desc { font-size: 14px; color: var(--text-sub); line-height: 1.7; margin-bottom: 16px; }
.reward-card-meta { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.reward-value {
  font-size: 15px; font-weight: 700;
  color: var(--primary);
  background: rgba(255,122,0,0.12);
  padding: 4px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255,122,0,0.2);
}
.reward-time { font-size: 13px; color: var(--text-weak); display: flex; align-items: center; gap: 6px; }
.reward-time svg { width: 14px; height: 14px; }

@media (max-width: 991px) {
  .reward-grid { grid-template-columns: 1fr 1fr; }
  .reward-card-lg { grid-column: span 2; }
}
@media (max-width: 767px) {
  .reward-grid { grid-template-columns: 1fr; }
  .reward-card-lg { grid-column: span 1; }
}

/* ===== Task / 任务进度 ===== */
.task-section { background: var(--bg-dark); position: relative; overflow: hidden; }
.task-section::before {
  content: '';
  position: absolute;
  bottom: -100px; left: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0,212,199,0.05), transparent 70%);
  pointer-events: none;
}
.task-layout { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 60px; align-items: center; }
.task-list { display: flex; flex-direction: column; gap: 16px; }
.task-item {
  display: flex; align-items: center; gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 24px;
  transition: var(--transition);
}
.task-item:hover { border-color: var(--border-hover); box-shadow: var(--shadow); }
.task-item.active { border-color: rgba(255,122,0,0.4); background: linear-gradient(145deg, rgba(255,122,0,0.06), var(--bg-card)); }
.task-item.done { border-color: rgba(0,212,199,0.3); background: linear-gradient(145deg, rgba(0,212,199,0.04), var(--bg-card)); }
.task-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  color: var(--text-weak);
}
.task-item.active .task-icon { background: rgba(255,122,0,0.15); border-color: rgba(255,122,0,0.3); color: var(--primary); }
.task-item.done .task-icon { background: rgba(0,212,199,0.12); border-color: rgba(0,212,199,0.3); color: var(--secondary); }
.task-icon svg { width: 20px; height: 20px; }
.task-info { flex: 1; }
.task-name { font-size: 16px; font-weight: 600; color: var(--text-main); }
.task-desc { font-size: 14px; color: var(--text-sub); }
.task-status {
  font-size: 13px; font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}
.task-status.pending { color: var(--text-weak); background: rgba(255,255,255,0.04); border: 1px solid var(--border); }
.task-status.progress { color: var(--primary); background: rgba(255,122,0,0.12); border: 1px solid rgba(255,122,0,0.25); }
.task-status.done { color: var(--secondary); background: rgba(0,212,199,0.1); border: 1px solid rgba(0,212,199,0.25); }

.progress-box { text-align: center; }
.progress-ring-wrap { position: relative; width: 220px; height: 220px; margin: 0 auto 32px; }
.progress-ring { transform: rotate(-90deg); width: 100%; height: 100%; }
.progress-ring-bg { fill: none; stroke: rgba(255,255,255,0.06); stroke-width: 10; }
.progress-ring-fill {
  fill: none;
  stroke: url(#progressGradient);
  stroke-width: 10;
  stroke-linecap: round;
  stroke-dasharray: 326.7;
  stroke-dashoffset: 120;
  transition: stroke-dashoffset 1s ease;
}
.progress-center { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; }
.progress-center .num { font-size: 48px; font-weight: 800; font-family: var(--font-mono); color: var(--text-main); line-height: 1; }
.progress-center .label { font-size: 14px; color: var(--text-sub); margin-top: 8px; }
.progress-note { font-size: 14px; color: var(--text-weak); max-width: 240px; margin: 0 auto; line-height: 1.7; }

@media (max-width: 991px) {
  .task-layout { grid-template-columns: 1fr; gap: 40px; }
  .progress-box { order: -1; }
}
@media (max-width: 767px) {
  .task-item { padding: 14px 16px; gap: 12px; flex-wrap: wrap; }
  .task-status { width: 100%; text-align: center; margin-left: 56px; }
  .progress-ring-wrap { width: 180px; height: 180px; }
  .progress-center .num { font-size: 38px; }
}

/* ===== CTA Section ===== */
.cta-section {
  position: relative;
  overflow: hidden;
  padding: 100px 0;
  background: linear-gradient(135deg, var(--bg-panel), var(--bg-dark));
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute; inset: 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
}
.cta-content { position: relative; z-index: 2; max-width: 600px; margin: 0 auto; }
.cta-content h2 { font-size: 36px; font-weight: 800; margin-bottom: 16px; line-height: 1.3; }
.cta-content h2 .gradient-text {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cta-content p { color: var(--text-sub); font-size: 16px; margin-bottom: 36px; line-height: 1.8; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.cta-note { font-size: 13px; color: var(--text-weak); margin-top: 20px; }

@media (max-width: 767px) {
  .cta-section { padding: 70px 0; }
  .cta-content h2 { font-size: 28px; }
  .cta-actions .btn { width: 100%; }
}

/* ===== News / 最新资讯 ===== */
.news-section { background: var(--bg-dark); }
.news-list { display: flex; flex-direction: column; gap: 20px; max-width: 960px; margin: 0 auto; }
.news-card {
  display: flex; gap: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: var(--transition);
  align-items: flex-start;
}
.news-card:hover { border-color: var(--border-hover); box-shadow: var(--shadow); transform: translateX(4px); }
.news-thumb { width: 160px; height: 100px; border-radius: 12px; overflow: hidden; flex-shrink: 0; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-body { flex: 1; display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.news-meta { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.news-cat {
  font-size: 12px; font-weight: 600;
  color: var(--primary);
  background: rgba(255,122,0,0.1);
  border: 1px solid rgba(255,122,0,0.2);
  padding: 2px 12px;
  border-radius: 999px;
}
.news-date { font-size: 13px; color: var(--text-weak); display: flex; align-items: center; gap: 6px; }
.news-date svg { width: 13px; height: 13px; }
.news-title { font-size: 17px; font-weight: 600; color: var(--text-main); line-height: 1.5; margin: 2px 0; }
.news-title:hover { color: var(--primary); }
.news-summary { font-size: 14px; color: var(--text-sub); line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; margin-top: 4px; }
.news-link:hover { gap: 10px; }
.news-empty {
  background: var(--bg-card);
  border: 1px dashed rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 60px 24px;
  text-align: center;
  color: var(--text-sub);
  font-size: 15px;
}

@media (max-width: 767px) {
  .news-card { flex-direction: column; padding: 16px; }
  .news-thumb { width: 100%; height: 160px; }
}

/* ===== FAQ ===== */
.faq-section { background: var(--bg-panel); }
.faq-wrap { max-width: 780px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  margin-bottom: 14px;
  background: var(--bg-card);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: rgba(255,122,0,0.3); box-shadow: var(--shadow); }
.faq-question {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 20px 24px;
  font-size: 16px; font-weight: 600;
  color: var(--text-main);
  text-align: left;
  cursor: pointer;
  transition: var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-q-mark {
  width: 28px; height: 28px;
  border-radius: 8px;
  background: rgba(255,122,0,0.12);
  border: 1px solid rgba(255,122,0,0.25);
  color: var(--primary);
  font-size: 14px; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.faq-q-text { flex: 1; }
.faq-icon { transition: transform 0.3s ease; color: var(--text-sub); flex-shrink: 0; }
.faq-icon svg { width: 18px; height: 18px; }
.faq-item.open .faq-icon { transform: rotate(45deg); color: var(--primary); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.8;
}
.faq-item.open .faq-answer { max-height: 400px; padding: 0 24px 22px; }

/* ===== Footer ===== */
.site-footer { background: var(--bg-deep); border-top: 1px solid var(--border); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: var(--text-sub); line-height: 1.8; max-width: 280px; }
.footer-title { font-size: 16px; font-weight: 700; color: var(--text-main); margin-bottom: 18px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: var(--text-sub); }
.footer-links a:hover { color: var(--primary); padding-left: 4px; }
.footer-contact { display: flex; flex-direction: column; gap: 10px; font-size: 14px; color: var(--text-sub); }
.footer-contact-item { display: flex; align-items: center; gap: 10px; }
.footer-contact-item svg { width: 16px; height: 16px; color: var(--primary); flex-shrink: 0; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: var(--text-weak);
}
.footer-bottom a { color: var(--text-weak); }
.footer-bottom a:hover { color: var(--primary); }

@media (max-width: 991px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ===== Back to top ===== */
.back-top {
  position: fixed;
  bottom: 30px; right: 30px;
  width: 46px; height: 46px;
  border-radius: 12px;
  background: linear-gradient(145deg, var(--primary), var(--primary-dark));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(255,122,0,0.35);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: linear-gradient(145deg, var(--primary-light), var(--primary)); color: #fff; transform: translateY(-3px); }
.back-top svg { width: 20px; height: 20px; }

/* ===== Responsive utilities ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 10px; } .mt-2 { margin-top: 20px; } .mt-3 { margin-top: 30px; } .mt-4 { margin-top: 40px; } .mt-5 { margin-top: 60px; }
.mb-1 { margin-bottom: 10px; } .mb-2 { margin-bottom: 20px; } .mb-3 { margin-bottom: 30px; } .mb-4 { margin-bottom: 40px; } .mb-5 { margin-bottom: 60px; }

/* roulang page: category1 */
:root{
  --bg:#0B0F19;--bg-panel:#161B28;--bg-card:#1A2130;--bg-input:#121826;
  --primary:#FF7A00;--primary-dark:#E56A00;--primary-light:#FFA040;
  --secondary:#00D4C7;--secondary-dark:#00B3A8;
  --text:#F5F7FA;--text-secondary:#9AA5B5;--text-muted:#6B7686;
  --border:rgba(255,255,255,0.08);--danger:#E5484D;--success:#46A758;
  --radius:16px;--radius-sm:8px;--radius-pill:999px;
  --shadow:0 8px 30px rgba(0,0,0,0.35);--shadow-hover:0 14px 44px rgba(0,0,0,0.5);
  --space-section:96px;--container-w:1200px;--header-h:72px;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-sans);background:var(--bg);color:var(--text);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;border-radius:var(--radius)}
a{color:inherit;text-decoration:none;transition:color .2s}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{list-style:none}
svg{width:1.25em;height:1.25em;vertical-align:middle;flex-shrink:0}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
.container{max-width:var(--container-w);margin:0 auto;padding:0 24px}
section{position:relative}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:15px;font-weight:600;padding:12px 28px;border-radius:var(--radius-pill);transition:all .25s ease;line-height:1.4;white-space:nowrap;border:2px solid transparent}
.btn-primary{background:var(--primary);color:#0B0F19;box-shadow:0 4px 20px rgba(255,122,0,.3)}
.btn-primary:hover{background:var(--primary-light);transform:translateY(-2px);box-shadow:0 8px 30px rgba(255,122,0,.4)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:transparent;color:var(--text);border-color:rgba(255,255,255,.3)}
.btn-outline:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}
.btn-lg{padding:16px 40px;font-size:17px}
.btn-sm{padding:8px 18px;font-size:13px}

/* 标签 */
.section-tag{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--secondary);background:rgba(0,212,199,.1);border:1px solid rgba(0,212,199,.25);padding:4px 14px;border-radius:var(--radius-pill);margin-bottom:14px}
.section-head{text-align:center;max-width:680px;margin:0 auto 48px}
.section-head h2{font-size:34px;font-weight:800;line-height:1.3;margin-bottom:12px;letter-spacing:-.01em}
.section-head p{color:var(--text-secondary);font-size:16px}
.section-head .section-tag{justify-content:center}

/* 面板/卡片 */
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);transition:all .3s ease;overflow:hidden}
.card:hover{border-color:rgba(255,122,0,.35);box-shadow:var(--shadow-hover);transform:translateY(-4px)}

/* ===== Header ===== */
.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;height:var(--header-h);background:rgba(11,15,25,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:var(--text);transition:opacity .2s}
.logo:hover{opacity:.85}
.logo-icon{width:34px;height:34px;color:var(--primary);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.logo-icon svg{width:100%;height:100%}
.logo-text{font-weight:800;letter-spacing:.02em}
.logo-text em{font-style:normal;color:var(--primary)}
.main-nav{display:flex;align-items:center;gap:8px}
.nav-link{position:relative;padding:10px 16px;font-size:15px;font-weight:500;color:var(--text-secondary);border-radius:var(--radius-sm);transition:color .2s}
.nav-link::after{content:'';position:absolute;left:16px;right:16px;bottom:2px;height:2px;background:var(--primary);border-radius:2px;transform:scaleX(0);transform-origin:center;transition:transform .25s ease}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--primary)}
.nav-link.active::after{transform:scaleX(1)}
.nav-cta{margin-left:8px}
.nav-toggle{display:none;flex-direction:column;width:44px;height:44px;justify-content:center;align-items:center;gap:5px;border-radius:var(--radius-sm);transition:background .2s}
.nav-toggle:hover{background:rgba(255,255,255,.06)}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:all .3s}
.nav-toggle.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Page Hero ===== */
.page-hero{min-height:480px;display:flex;align-items:center;padding:calc(var(--header-h) + 60px) 0 60px;background:linear-gradient(135deg,rgba(11,15,25,.82),rgba(22,27,40,.88)),url('/assets/images/backpic/back-1.png') center/cover no-repeat;border-bottom:1px solid var(--border);overflow:hidden}
.page-hero::before{content:'';position:absolute;top:-180px;right:-80px;width:420px;height:420px;background:radial-gradient(circle,rgba(255,122,0,.12),transparent 65%);pointer-events:none}
.page-hero::after{content:'';position:absolute;bottom:-120px;left:-40px;width:320px;height:320px;background:radial-gradient(circle,rgba(0,212,199,.08),transparent 65%);pointer-events:none}
.hero-content{position:relative;z-index:2;max-width:720px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-muted);margin-bottom:20px;flex-wrap:wrap}
.breadcrumb a{color:var(--text-secondary);transition:color .2s}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:var(--text-muted)}
.breadcrumb .current{color:var(--text)}
.page-hero h1{font-size:52px;font-weight:800;line-height:1.15;margin-bottom:18px;letter-spacing:-.02em;background:linear-gradient(120deg,#fff 20%,var(--primary-light) 70%,var(--secondary) 130%);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.page-hero .sub{font-size:18px;line-height:1.8;color:#C0C8D9;max-width:580px;margin-bottom:30px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;gap:36px;margin-top:40px;flex-wrap:wrap}
.hero-stat{display:flex;flex-direction:column}
.hero-stat b{font-size:28px;font-weight:800;color:var(--text);line-height:1.2}
.hero-stat b i{font-style:normal;font-size:16px;color:var(--secondary);margin-left:2px}
.hero-stat span{font-size:13px;color:var(--text-muted)}

/* ===== Intro ===== */
.intro-section{padding:var(--space-section) 0;background:var(--bg)}
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.intro-media img{width:100%;height:100%;min-height:340px;object-fit:cover;border-radius:var(--radius);box-shadow:var(--shadow)}
.intro-content h2{font-size:34px;font-weight:800;line-height:1.3;margin-bottom:16px}
.intro-content>p{color:var(--text-secondary);font-size:16px;margin-bottom:24px}
.intro-features{display:flex;flex-direction:column;gap:12px}
.intro-features li{display:flex;align-items:center;gap:12px;color:var(--text);font-size:15px}
.intro-features li svg{color:var(--secondary);font-size:20px}
.intro-features li .feat-num{width:34px;height:34px;border-radius:50%;background:rgba(255,122,0,.12);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex-shrink:0}

/* ===== Coverage ===== */
.coverage-section{padding:var(--space-section) 0;background:var(--bg-panel);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.coverage-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.coverage-card{padding:36px 28px;position:relative}
.coverage-card .idx{position:absolute;top:22px;right:24px;font-size:48px;font-weight:800;color:rgba(255,255,255,.06);line-height:1}
.coverage-card .icon{width:48px;height:48px;border-radius:12px;background:linear-gradient(135deg,rgba(255,122,0,.18),rgba(0,212,199,.12));display:flex;align-items:center;justify-content:center;color:var(--primary);margin-bottom:20px;font-size:22px}
.coverage-card h3{font-size:20px;font-weight:700;margin-bottom:10px}
.coverage-card p{color:var(--text-secondary);font-size:15px}
.coverage-card:hover .icon{background:linear-gradient(135deg,rgba(255,122,0,.28),rgba(0,212,199,.2));transform:scale(1.05)}
.coverage-card .icon svg{transition:transform .3s}
.coverage-card:hover .icon svg{transform:scale(1.1)}

/* ===== Topic ===== */
.topic-section{padding:var(--space-section) 0;background:var(--bg)}
.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.topic-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:all .3s ease;box-shadow:var(--shadow);position:relative}
.topic-card:hover{border-color:rgba(255,122,0,.4);transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.topic-card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--bg-panel)}
.topic-card-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.topic-card:hover .topic-card-media img{transform:scale(1.05)}
.topic-card-media .badge{position:absolute;top:12px;left:12px;z-index:2;background:rgba(11,15,25,.85);backdrop-filter:blur(6px);color:var(--secondary);font-size:12px;font-weight:600;padding:4px 10px;border-radius:var(--radius-pill);border:1px solid rgba(0,212,199,.3)}
.topic-card-body{padding:20px 20px 24px}
.topic-card-body h3{font-size:17px;font-weight:700;margin-bottom:8px;line-height:1.4}
.topic-card-body p{color:var(--text-secondary);font-size:14px;margin-bottom:16px}
.topic-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary);transition:gap .2s}
.topic-link:hover{gap:10px}

/* ===== Data ===== */
.data-section{padding:var(--space-section) 0;background:var(--bg-panel);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.data-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 22px;text-align:center;transition:all .3s ease;box-shadow:var(--shadow)}
.data-item:hover{border-color:rgba(0,212,199,.35);transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.data-item .icon{width:54px;height:54px;margin:0 auto 16px;border-radius:14px;background:rgba(0,212,199,.1);border:1px solid rgba(0,212,199,.2);display:flex;align-items:center;justify-content:center;color:var(--secondary);font-size:24px}
.data-item h3{font-size:16px;font-weight:700;margin-bottom:8px}
.data-item p{font-size:14px;color:var(--text-secondary)}
.data-item b{display:block;font-size:32px;font-weight:800;color:var(--text);margin-bottom:4px;line-height:1.2}
.data-item b em{font-style:normal;font-size:14px;color:var(--text-muted);font-weight:500}

/* ===== Flow ===== */
.flow-section{padding:var(--space-section) 0;background:var(--bg)}
.flow-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;position:relative;counter-reset:step}
.flow-steps::before{content:'';position:absolute;top:40px;left:10%;right:10%;height:1px;background:linear-gradient(90deg,transparent,var(--border),transparent);pointer-events:none}
.flow-step{text-align:center;position:relative;padding:0 20px}
.flow-step .step-num{width:80px;height:80px;margin:0 auto 20px;border-radius:50%;background:linear-gradient(135deg,rgba(255,122,0,.15),rgba(255,122,0,.05));border:1px solid rgba(255,122,0,.3);display:flex;align-items:center;justify-content:center;font-size:28px;font-weight:800;color:var(--primary);position:relative;z-index:2;box-shadow:0 0 30px rgba(255,122,0,.1)}
.flow-step h3{font-size:18px;font-weight:700;margin-bottom:8px}
.flow-step p{font-size:14px;color:var(--text-secondary)}

/* ===== FAQ ===== */
.faq-section{padding:var(--space-section) 0;background:var(--bg-panel);border-top:1px solid var(--border)}
.faq-list{max-width:780px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:12px;background:var(--bg-card);transition:border-color .2s}
.faq-item.active{border-color:rgba(255,122,0,.35)}
.faq-question{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;font-size:15px;font-weight:600;text-align:left;width:100%;transition:color .2s}
.faq-question:hover{color:var(--primary)}
.faq-question .q-mark{width:24px;height:24px;border-radius:6px;background:rgba(255,122,0,.12);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;flex-shrink:0}
.faq-question .q-text{flex:1}
.faq-question .arrow{width:20px;height:20px;flex-shrink:0;transition:transform .3s;color:var(--text-muted)}
.faq-item.active .arrow{transform:rotate(45deg);color:var(--primary)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 22px;color:var(--text-secondary);font-size:15px;line-height:1.8}
.faq-item.active .faq-answer{max-height:300px;padding-bottom:20px}

/* ===== CTA ===== */
.cta-section{padding:var(--space-section) 0;background:var(--bg)}
.cta-box{position:relative;overflow:hidden;background:linear-gradient(135deg,rgba(255,122,0,.14),rgba(0,212,199,.08)),var(--bg-card);border:1px solid rgba(255,122,0,.25);border-radius:24px;padding:64px 40px;text-align:center;box-shadow:var(--shadow)}
.cta-box::before{content:'';position:absolute;top:-100px;left:50%;transform:translateX(-50%);width:400px;height:200px;background:radial-gradient(ellipse,rgba(255,122,0,.15),transparent 70%);pointer-events:none}
.cta-box h2{font-size:36px;font-weight:800;margin-bottom:12px}
.cta-box p{color:var(--text-secondary);font-size:16px;max-width:560px;margin:0 auto 32px}
.cta-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ===== Footer ===== */
.site-footer{background:#080B12;border-top:1px solid var(--border);padding:60px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:40px;margin-bottom:40px}
.footer-brand .logo{margin-bottom:16px;display:inline-flex}
.footer-brand p{font-size:14px;color:var(--text-muted);max-width:320px}
.footer-title{font-size:16px;font-weight:700;margin-bottom:18px;color:var(--text);position:relative;padding-bottom:10px}
.footer-title::after{content:'';position:absolute;left:0;bottom:0;width:24px;height:2px;background:var(--primary);border-radius:2px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-secondary);transition:color .2s,padding-left .2s}
.footer-links a:hover{color:var(--primary);padding-left:4px}
.footer-contact{display:flex;flex-direction:column;gap:12px}
.footer-contact-item{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-secondary)}
.footer-contact-item svg{color:var(--primary);width:18px;height:18px}
.footer-bottom{border-top:1px solid var(--border);padding:20px 0;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;font-size:13px;color:var(--text-muted)}

/* ===== Responsive ===== */
@media(max-width:1199px){
  .topic-grid{grid-template-columns:repeat(2,1fr)}
  .data-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:991px){
  :root{--space-section:72px}
  .intro-grid{grid-template-columns:1fr;gap:40px}
  .coverage-grid{grid-template-columns:1fr;max-width:560px;margin:0 auto}
  .flow-steps{grid-template-columns:1fr;max-width:420px;margin:0 auto;gap:24px}
  .flow-steps::before{display:none}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .page-hero h1{font-size:40px}
}
@media(max-width:767px){
  :root{--space-section:56px;--header-h:60px}
  .site-header{height:var(--header-h)}
  .main-nav{position:fixed;top:var(--header-h);left:0;right:0;background:rgba(11,15,25,.97);flex-direction:column;align-items:stretch;padding:12px 20px 20px;border-bottom:1px solid var(--border);display:none;max-height:calc(100vh - var(--header-h));overflow-y:auto}
  .main-nav.open{display:flex}
  .nav-link{padding:14px 8px;font-size:16px;border-radius:var(--radius-sm)}
  .nav-link::after{left:8px;right:auto;bottom:6px;width:24px}
  .nav-cta{margin:12px 0 0;width:100%;text-align:center}
  .nav-toggle{display:flex}
  .page-hero{padding:calc(var(--header-h) + 36px) 0 44px;min-height:auto}
  .page-hero h1{font-size:32px}
  .page-hero .sub{font-size:16px}
  .hero-stats{flex-direction:column;gap:16px}
  .topic-grid{grid-template-columns:1fr}
  .data-grid{grid-template-columns:1fr}
  .cta-box{padding:48px 20px}
  .cta-box h2{font-size:28px}
  .section-head h2{font-size:27px}
  .intro-content h2{font-size:27px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;text-align:center}
  .hero-actions .btn{width:100%}
  .cta-actions .btn{width:100%}
}
@media(max-width:520px){
  .topic-card-body p{font-size:13px}
  .data-item{text-align:left;display:flex;align-items:center;gap:16px}
  .data-item .icon{margin:0}
  .faq-question{padding:16px}
  .faq-answer{padding:0 16px}
  .btn{padding:10px 20px}
}

/* roulang page: article */
:root {
  --bg-deep: #0B0F19;
  --bg-panel: #111624;
  --bg-card: #1A2130;
  --bg-card-hover: #1E2637;
  --text-main: #F5F7FA;
  --text-secondary: #9AA5B5;
  --text-weak: #6B7686;
  --brand-primary: #F5A623;
  --brand-primary-bright: #FFB84D;
  --brand-accent: #00D4C7;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-card-hover: 0 14px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 8px 30px rgba(245, 166, 35, 0.2);
  --transition-fast: 0.2s ease;
  --transition-slow: 0.35s ease;
  --container-max: 1200px;
  --container-pad: 24px;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", "Segoe UI", Roboto, sans-serif;
}

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

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

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

img { max-width: 100%; height: auto; display: block; border: 0; }

a { color: inherit; text-decoration: none; transition: color var(--transition-fast), border-color var(--transition-fast); }

button { font-family: inherit; cursor: pointer; }

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

::selection { background: rgba(245, 166, 35, 0.28); color: #fff; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--bg-card); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #2A3448; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
  cursor: pointer;
}
.btn:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: #171206;
}
.btn-primary:hover {
  background: var(--brand-primary-bright);
  border-color: var(--brand-primary-bright);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.btn-primary:active { transform: translateY(0) scale(0.98); }
.btn-outline {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text-main);
}
.btn-outline:hover {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  background: rgba(245, 166, 35, 0.06);
  transform: translateY(-2px);
}
.btn-outline:active { transform: translateY(0); }
.btn-large { padding: 16px 40px; font-size: 17px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 25, 0.92);
  border-bottom: 1px solid var(--border-color);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-primary);
}
.logo-icon svg { width: 100%; height: 100%; }
.logo-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-main);
  transition: color var(--transition-fast);
}
.logo-text em { font-style: normal; color: var(--brand-primary); }
.logo:hover .logo-text { color: var(--brand-primary); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  position: relative;
  padding: 10px 16px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  border-radius: 8px;
  transition: color var(--transition-fast);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 3px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand-primary);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--transition-slow);
}
.nav-link:hover { color: var(--text-main); }
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active { color: var(--brand-primary); }
.nav-link.active::after { transform: scaleX(1); }
.nav-cta { margin-left: 12px; padding: 10px 24px; }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 8px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  border-radius: 2px;
  background: var(--text-main);
  transition: all var(--transition-fast);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--text-weak);
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--brand-primary); }
.breadcrumb-sep { opacity: 0.5; }
.breadcrumb-current { color: var(--text-weak); }

.article-hero {
  position: relative;
  overflow: hidden;
  padding: 52px 0 44px;
  background:
    linear-gradient(150deg, rgba(11, 15, 25, 0.92), rgba(17, 22, 36, 0.82)),
    url('/assets/images/backpic/back-2.png') center 30% / cover no-repeat;
  border-bottom: 1px solid var(--border-color);
}
.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 60%, rgba(245, 166, 35, 0.08), transparent 32%),
    radial-gradient(circle at 85% 30%, rgba(0, 212, 199, 0.06), transparent 30%);
  pointer-events: none;
}
.article-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}
.article-hero .container { position: relative; z-index: 1; }
.article-hero-content { margin-top: 26px; }
.article-hero-content h1 {
  margin: 0 0 18px;
  font-size: 42px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: 0.5px;
  max-width: 860px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  padding: 5px 14px;
  border-radius: 999px;
}

.article-main {
  padding: 48px 0 72px;
}
.article-layout {
  max-width: 860px;
  margin: 0 auto;
}
.article-card {
  position: relative;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 56px;
  box-shadow: var(--shadow-card);
}
.article-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 56px;
  right: 56px;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-accent));
  border-radius: 0 0 6px 6px;
}
.article-content {
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-main);
  word-break: break-word;
}
.article-content p { margin: 0 0 22px; }
.article-content h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
  margin: 44px 0 16px;
}
.article-content h3 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.45;
  margin: 36px 0 12px;
}
.article-content h4 {
  font-size: 18px;
  font-weight: 700;
  margin: 28px 0 10px;
}
.article-content a {
  color: var(--brand-primary);
  border-bottom: 1px solid transparent;
}
.article-content a:hover { border-bottom-color: var(--brand-primary); }
.article-content ul,
.article-content ol { margin: 0 0 22px; padding-left: 26px; }
.article-content li { margin-bottom: 8px; }
.article-content li::marker { color: var(--brand-primary); }
.article-content blockquote {
  margin: 28px 0;
  padding: 18px 24px;
  background: rgba(245, 166, 35, 0.05);
  border-left: 4px solid var(--brand-primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
}
.article-content img {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  margin: 28px 0;
}
.article-content figure { margin: 28px 0; }
.article-content figcaption {
  font-size: 13px;
  color: var(--text-weak);
  text-align: center;
  margin-top: 10px;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 15px;
  line-height: 1.7;
}
.article-content table th {
  background: var(--bg-card);
  color: var(--text-main);
  font-weight: 600;
  text-align: left;
  padding: 12px 16px;
  border: 1px solid var(--border-color);
}
.article-content table td {
  padding: 12px 16px;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}
.article-content table tr:hover td { background: rgba(255, 255, 255, 0.02); }
.article-content pre {
  background: #0D1220;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.75;
  margin: 28px 0;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}
.article-content code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 7px;
  border-radius: 4px;
  font-size: 0.88em;
  color: var(--brand-accent);
}
.article-content pre code {
  background: transparent;
  padding: 0;
  color: var(--text-main);
}
.article-content .note-box,
.article-content .tip-box,
.article-content .warn-box {
  border-radius: var(--radius-md);
  padding: 18px 22px;
  margin: 28px 0;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  font-size: 15px;
  color: var(--text-secondary);
}
.article-content .note-box { border-left: 4px solid var(--brand-accent); }
.article-content .tip-box { border-left: 4px solid var(--brand-primary); }
.article-content .warn-box { border-left: 4px solid #E5484D; }
.article-content > *:last-child { margin-bottom: 0; }

.article-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--border-color);
}

.article-empty {
  text-align: center;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 72px 32px;
  box-shadow: var(--shadow-card);
}
.article-empty h1 {
  font-size: 32px;
  font-weight: 800;
  margin: 0 0 36px;
}

.related-section {
  padding: 80px 0;
  background: var(--bg-panel);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.section-head {
  text-align: center;
  margin-bottom: 44px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--brand-accent);
  margin-bottom: 8px;
}
.section-title {
  font-size: 32px;
  font-weight: 800;
  margin: 0 0 10px;
  line-height: 1.3;
}
.section-subtitle {
  color: var(--text-secondary);
  font-size: 15px;
  margin: 0;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.related-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-slow);
}
.related-card:hover {
  transform: translateY(-5px);
  border-color: rgba(245, 166, 35, 0.5);
  box-shadow: var(--shadow-card-hover);
}
.related-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}
.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}
.related-card:hover .related-thumb img { transform: scale(1.05); }
.related-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(11, 15, 25, 0.82);
  color: var(--brand-primary);
  border: 1px solid rgba(245, 166, 35, 0.4);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
}
.related-card-body { padding: 22px 24px 26px; }
.related-card-body h3 {
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text-main);
  transition: color var(--transition-fast);
}
.related-card:hover .related-card-body h3 { color: var(--brand-primary); }
.related-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 16px;
  line-height: 1.7;
}
.related-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-primary);
}

.feature-strip {
  padding: 72px 0;
  background: var(--bg-deep);
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}
.feature-item:hover { border-color: var(--brand-primary); transform: translateY(-3px); }
.feature-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(245, 166, 35, 0.12);
  color: var(--brand-primary);
}
.feature-icon svg { width: 22px; height: 22px; }
.feature-body { min-width: 0; }
.feature-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--text-main);
}
.feature-item p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.7;
}

.faq-section { padding: 80px 0; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}
.faq-item:hover { border-color: var(--border-strong); }
.faq-question {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 22px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  background: transparent;
  border: 0;
  width: 100%;
  text-align: left;
  transition: color var(--transition-fast);
}
.faq-question:hover { color: var(--brand-primary); }
.faq-question::before {
  content: "Q";
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(245, 166, 35, 0.12);
  color: var(--brand-primary);
  font-size: 13px;
  font-weight: 800;
}
.faq-answer {
  padding: 0 22px 20px 60px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
}

.cta-section {
  position: relative;
  overflow: hidden;
  padding: 100px 0;
  background:
    linear-gradient(140deg, rgba(11, 15, 25, 0.9), rgba(17, 22, 36, 0.85)),
    url('/assets/images/backpic/back-3.png') center / cover no-repeat;
  text-align: center;
  border-top: 1px solid var(--border-color);
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(245, 166, 35, 0.10), transparent 50%);
  pointer-events: none;
}
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 {
  font-size: 34px;
  font-weight: 800;
  margin: 0 0 14px;
  line-height: 1.3;
}
.cta-section p {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 620px;
  margin: 0 auto 32px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

.site-footer {
  background: #080B12;
  border-top: 1px solid var(--border-color);
}
.site-footer .container { padding-top: 56px; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .logo-text { font-size: 20px; }
.footer-brand p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
  margin: 16px 0 0;
  max-width: 300px;
}
.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-main);
  margin: 0 0 18px;
  letter-spacing: 0.5px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-links a {
  color: var(--text-secondary);
  font-size: 14px;
}
.footer-links a:hover { color: var(--brand-primary); }
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 14px;
}
.footer-contact-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--brand-accent);
}
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 20px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: var(--text-weak);
}

@media (max-width: 992px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .related-grid { grid-template-columns: 1fr 1fr; }
  .article-card { padding: 40px; }
  .article-hero-content h1 { font-size: 36px; }
}

@media (max-width: 768px) {
  body { font-size: 15px; }
  .header-inner { height: 60px; }
  .nav-toggle { display: flex; }
  .main-nav {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 4px;
    max-height: calc(100vh - 60px);
    overflow-y: auto;
    box-shadow: var(--shadow-card);
    z-index: 99;
  }
  .main-nav.open { display: flex; }
  .nav-link { padding: 14px 16px; font-size: 16px; }
  .nav-cta { margin: 12px 0 4px; justify-content: center; }
  .article-hero { padding: 36px 0 32px; }
  .article-hero-content h1 { font-size: 30px; }
  .article-main { padding: 32px 0 56px; }
  .article-card { padding: 28px 20px; }
  .article-card::before { left: 20px; right: 20px; }
  .article-content { font-size: 16px; line-height: 1.85; }
  .article-content h2 { font-size: 24px; }
  .article-content h3 { font-size: 20px; }
  .related-section { padding: 56px 0; }
  .section-title { font-size: 26px; }
  .feature-grid { grid-template-columns: 1fr; }
  .cta-section { padding: 72px 0; }
  .cta-section h2 { font-size: 27px; }
  .site-footer .container { padding-top: 44px; }
}

@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .btn-large { width: 100%; }
  .article-meta { gap: 8px; }
  .breadcrumb { font-size: 13px; }
  .logo-text { font-size: 18px; }
  .logo-icon { width: 32px; height: 32px; }
}

/* roulang page: category2 */
:root {
      --color-primary: #F5A623;
      --color-primary-strong: #FF7A00;
      --color-secondary: #00D4C7;
      --color-bg: #0B0F19;
      --color-bg-light: #111624;
      --color-panel: #161B28;
      --color-card: #1A2130;
      --color-text: #F5F7FA;
      --color-text-secondary: #9AA5B5;
      --color-text-muted: #6B7686;
      --color-border: rgba(255, 255, 255, 0.08);
      --color-danger: #E5484D;
      --color-success: #46A758;
      --radius-lg: 16px;
      --radius-md: 10px;
      --radius-sm: 6px;
      --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
      --shadow-hover: 0 14px 40px rgba(0, 0, 0, 0.5);
      --header-h: 72px;
      --font-main: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "-apple-system", "Segoe UI", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

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

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

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

    button {
      font: inherit;
      border: none;
      background: none;
      cursor: pointer;
      color: inherit;
    }

    ul, ol {
      list-style: none;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 600;
      font-size: 15px;
      line-height: 1.2;
      padding: 12px 28px;
      border-radius: 999px;
      border: 2px solid transparent;
      transition: all 0.25s ease;
      white-space: nowrap;
    }

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

    .btn-primary {
      background: var(--color-primary);
      color: #141414;
    }

    .btn-primary:hover {
      background: var(--color-primary-strong);
      transform: translateY(-1px);
      box-shadow: 0 10px 30px rgba(245, 166, 35, 0.25);
    }

    .btn-primary:active {
      transform: translateY(1px);
      box-shadow: none;
    }

    .btn-outline {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.2);
      color: var(--color-text);
    }

    .btn-outline:hover {
      border-color: var(--color-primary);
      color: var(--color-primary);
      transform: translateY(-1px);
    }

    .btn-outline:active {
      transform: translateY(1px);
    }

    .btn-lg {
      padding: 16px 44px;
      font-size: 18px;
    }

    .section {
      padding: 90px 0;
    }

    .section-alt {
      background: var(--color-bg-light);
    }

    .section-head {
      max-width: 680px;
      margin-bottom: 48px;
    }

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

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      color: var(--color-secondary);
      background: rgba(0, 212, 199, 0.1);
      border: 1px solid rgba(0, 212, 199, 0.22);
      padding: 4px 14px;
      border-radius: 999px;
      margin-bottom: 16px;
    }

    .section-title {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--color-text-secondary);
      line-height: 1.8;
    }

    /* Header */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: var(--header-h);
      background: rgba(11, 15, 25, 0.92);
      border-bottom: 1px solid var(--color-border);
      z-index: 1000;
      transition: box-shadow 0.3s ease;
    }

    .site-header.scrolled {
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
      gap: 24px;
    }

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

    .logo-icon {
      width: 40px;
      height: 40px;
      color: var(--color-primary);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .logo-icon svg {
      width: 100%;
      height: 100%;
    }

    .logo-text {
      font-size: 22px;
      font-weight: 800;
      letter-spacing: 0.4px;
      line-height: 1.2;
    }

    .logo-text em {
      font-style: normal;
      color: var(--color-primary);
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--color-text-secondary);
      padding: 6px 2px;
      position: relative;
      transition: color 0.2s ease;
    }

    .nav-link::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: -2px;
      height: 2px;
      background: var(--color-primary);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.3s ease;
    }

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

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

    .nav-link.active::after {
      transform: scaleX(1);
    }

    .nav-cta {
      padding: 9px 24px;
      font-size: 14px;
    }

    .nav-toggle {
      display: none;
      width: 42px;
      height: 42px;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      background: transparent;
      transition: border-color 0.2s;
    }

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

    .nav-toggle span {
      width: 18px;
      height: 2px;
      background: var(--color-text);
      border-radius: 2px;
      transition: transform 0.3s ease, opacity 0.3s ease;
    }

    .nav-toggle[aria-expanded="true"] span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle[aria-expanded="true"] span:nth-child(2) {
      opacity: 0;
    }

    .nav-toggle[aria-expanded="true"] span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    /* Hero */
    .hero {
      position: relative;
      padding: 200px 0 120px;
      min-height: 620px;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
      background-color: var(--color-bg);
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(11, 15, 25, 0.78) 0%, rgba(11, 15, 25, 0.86) 60%, var(--color-bg) 100%);
    }

    .hero::after {
      content: "";
      position: absolute;
      width: 480px;
      height: 480px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(245, 166, 35, 0.16), transparent 68%);
      top: 12%;
      right: 6%;
      pointer-events: none;
    }

    .hero-inner {
      position: relative;
      z-index: 1;
      max-width: 920px;
    }

    .breadcrumb {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--color-text-muted);
      margin-bottom: 28px;
    }

    .breadcrumb a {
      color: var(--color-text-muted);
      transition: color 0.2s;
    }

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

    .breadcrumb .sep {
      opacity: 0.5;
    }

    .breadcrumb .current {
      color: var(--color-text-secondary);
    }

    .hero-title {
      font-size: 54px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 22px;
      letter-spacing: 1px;
    }

    .hero-title .gradient {
      background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .hero-subtitle {
      font-size: 19px;
      line-height: 1.8;
      color: #C0C8D9;
      max-width: 760px;
      margin-bottom: 34px;
    }

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

    .scroll-hint {
      position: absolute;
      bottom: 36px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 2;
      color: var(--color-text-muted);
      opacity: 0.7;
      transition: color 0.2s, opacity 0.2s, transform 0.2s;
    }

    .scroll-hint:hover {
      color: var(--color-primary);
      opacity: 1;
      transform: translateX(-50%) translateY(4px);
    }

    .scroll-hint svg {
      width: 26px;
      height: 26px;
    }

    /* Card Grid */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .icon-card {
      position: relative;
      background: var(--color-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 30px;
      overflow: hidden;
      transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .icon-card:hover {
      transform: translateY(-4px);
      border-color: rgba(245, 166, 35, 0.4);
      box-shadow: var(--shadow-hover);
    }

    .icon-card .card-icon {
      width: 50px;
      height: 50px;
      background: rgba(245, 166, 35, 0.12);
      border: 1px solid rgba(245, 166, 35, 0.18);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-primary);
      margin-bottom: 18px;
    }

    .icon-card .card-icon svg {
      width: 24px;
      height: 24px;
    }

    .icon-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .icon-card p {
      font-size: 15px;
      color: var(--color-text-secondary);
      line-height: 1.75;
    }

    .card-lg {
      grid-column: span 2;
      background: linear-gradient(135deg, #1E2637, var(--color-card));
      border: 1px solid rgba(245, 166, 35, 0.22);
    }

    .card-lg:hover {
      border-color: rgba(245, 166, 35, 0.5);
    }

    .card-lg .card-icon {
      width: 60px;
      height: 60px;
    }

    .card-lg h3 {
      font-size: 24px;
    }

    .card-lg p {
      font-size: 16px;
      max-width: 520px;
    }

    .card-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 18px;
    }

    .tag {
      display: inline-block;
      font-size: 13px;
      color: var(--color-text-secondary);
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--color-border);
      padding: 3px 12px;
      border-radius: var(--radius-sm);
      transition: color 0.2s, border-color 0.2s;
    }

    .tag:hover {
      color: var(--color-secondary);
      border-color: rgba(0, 212, 199, 0.3);
    }

    .card-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      margin-top: 20px;
      font-size: 14px;
      font-weight: 600;
      color: var(--color-primary);
      transition: gap 0.2s ease;
    }

    .card-link:hover {
      gap: 10px;
    }

    /* Split Rows */
    .split-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
      margin-bottom: 72px;
    }

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

    .split-row.reversed .split-media {
      order: 2;
    }

    .split-media {
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-card);
      background: var(--color-card);
    }

    .split-media img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
    }

    .split-content h3 {
      font-size: 26px;
      font-weight: 700;
      line-height: 1.4;
      margin-bottom: 14px;
    }

    .split-content p {
      font-size: 16px;
      color: var(--color-text-secondary);
      line-height: 1.8;
    }

    /* Steps */
    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .step {
      position: relative;
      padding: 34px 26px;
      background: var(--color-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      transition: border-color 0.3s, transform 0.3s;
    }

    .step:hover {
      border-color: rgba(0, 212, 199, 0.3);
      transform: translateY(-4px);
    }

    .step-num {
      width: 54px;
      height: 54px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 800;
      color: #141414;
      margin-bottom: 18px;
    }

    .step h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .step p {
      font-size: 15px;
      color: var(--color-text-secondary);
      line-height: 1.75;
    }

    /* Reward Panel */
    .reward-panel {
      background: linear-gradient(135deg, #161B28, #111624);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 48px;
      position: relative;
      overflow: hidden;
    }

    .reward-panel::after {
      content: "";
      position: absolute;
      width: 320px;
      height: 320px;
      background: radial-gradient(circle, rgba(0, 212, 199, 0.08), transparent 70%);
      top: -100px;
      right: -80px;
      pointer-events: none;
    }

    .data-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 36px;
      position: relative;
      z-index: 1;
    }

    .data-card {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      padding: 26px;
      transition: border-color 0.3s, transform 0.3s;
    }

    .data-card:hover {
      border-color: rgba(0, 212, 199, 0.35);
      transform: translateY(-3px);
    }

    .data-card .data-icon {
      color: var(--color-secondary);
      margin-bottom: 14px;
    }

    .data-card .data-icon svg {
      width: 28px;
      height: 28px;
    }

    .data-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .data-card p {
      font-size: 15px;
      color: var(--color-text-secondary);
      line-height: 1.75;
    }

    .reward-note {
      margin-top: 28px;
      padding: 16px 20px;
      background: rgba(0, 212, 199, 0.06);
      border-left: 3px solid var(--color-secondary);
      border-radius: 8px;
      font-size: 15px;
      color: var(--color-text-secondary);
      position: relative;
      z-index: 1;
    }

    /* Tips */
    .tips-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .tip-item {
      display: flex;
      gap: 14px;
      align-items: flex-start;
      background: var(--color-card);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-md);
      padding: 20px 22px;
      transition: border-color 0.3s, transform 0.3s;
    }

    .tip-item:hover {
      border-color: rgba(0, 212, 199, 0.3);
      transform: translateY(-2px);
    }

    .tip-check {
      flex-shrink: 0;
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: rgba(0, 212, 199, 0.12);
      color: var(--color-secondary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-top: 2px;
    }

    .tip-check svg {
      width: 14px;
      height: 14px;
    }

    .tip-item p {
      font-size: 15px;
      color: var(--color-text-secondary);
      line-height: 1.7;
    }

    .warn-box {
      display: flex;
      gap: 16px;
      align-items: flex-start;
      background: rgba(229, 72, 77, 0.06);
      border: 1px solid rgba(229, 72, 77, 0.25);
      border-radius: var(--radius-lg);
      padding: 22px 26px;
      margin-top: 24px;
    }

    .warn-box .icon {
      flex-shrink: 0;
      color: var(--color-danger);
      margin-top: 3px;
    }

    .warn-box .icon svg {
      width: 24px;
      height: 24px;
    }

    .warn-box p {
      font-size: 15px;
      color: var(--color-text-secondary);
      line-height: 1.75;
    }

    .warn-box strong {
      color: var(--color-text);
      font-weight: 600;
    }

    /* FAQ */
    .faq {
      max-width: 820px;
      margin: 0 auto;
    }

    .faq-item {
      border: 1px solid var(--color-border);
      border-bottom: none;
      transition: border-color 0.3s;
    }

    .faq-item:first-child {
      border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

    .faq-item:last-child {
      border-bottom: 1px solid var(--color-border);
      border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    }

    .faq-item.open {
      border-color: rgba(245, 166, 35, 0.28);
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 22px 24px;
      text-align: left;
      font-size: 17px;
      font-weight: 600;
      color: var(--color-text);
      transition: color 0.2s;
    }

    .faq-question:hover {
      color: var(--color-primary);
    }

    .faq-q {
      color: var(--color-primary);
      font-weight: 800;
      font-size: 16px;
      flex-shrink: 0;
    }

    .faq-icon {
      margin-left: auto;
      flex-shrink: 0;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      border: 1px solid var(--color-border);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--color-text-muted);
      transition: transform 0.3s ease, color 0.3s, border-color 0.3s;
    }

    .faq-icon svg {
      width: 14px;
      height: 14px;
    }

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      color: var(--color-primary);
      border-color: var(--color-primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
    }

    .faq-item.open .faq-answer {
      max-height: 500px;
    }

    .faq-answer p {
      padding: 0 24px 24px 58px;
      font-size: 15px;
      color: var(--color-text-secondary);
      line-height: 1.8;
    }

    /* CTA */
    .cta {
      position: relative;
      padding: 110px 0;
      background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
      background-color: var(--color-bg);
    }

    .cta::before {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(11, 15, 25, 0.84);
    }

    .cta-inner {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 720px;
      margin: 0 auto;
    }

    .cta h2 {
      font-size: 38px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .cta p {
      font-size: 17px;
      color: var(--color-text-secondary);
      margin-bottom: 34px;
    }

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

    .cta-note {
      font-size: 14px;
      color: var(--color-text-muted);
      margin-top: 22px;
      margin-bottom: 0;
    }

    /* Footer */
    .site-footer {
      background: #080B12;
      border-top: 1px solid var(--color-border);
      padding: 70px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-brand .logo {
      margin-bottom: 16px;
    }

    .footer-brand p {
      font-size: 15px;
      color: var(--color-text-muted);
      line-height: 1.8;
      max-width: 360px;
    }

    .footer-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--color-text);
      margin-bottom: 18px;
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      font-size: 15px;
      color: var(--color-text-secondary);
      transition: color 0.2s, padding-left 0.2s;
    }

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

    .footer-contact {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .footer-contact-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--color-text-secondary);
    }

    .footer-contact-item svg {
      width: 18px;
      height: 18px;
      color: var(--color-primary);
      flex-shrink: 0;
    }

    .footer-bottom {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      border-top: 1px solid var(--color-border);
      padding-top: 26px;
      font-size: 13px;
      color: var(--color-text-muted);
    }

    /* Focus visible global */
    a:focus-visible,
    button:focus-visible,
    .faq-question:focus-visible {
      outline: 2px solid var(--color-primary);
      outline-offset: 2px;
      border-radius: 4px;
    }

    /* Responsive */
    @media (max-width: 1199px) {
      .card-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .card-lg {
        grid-column: span 2;
      }

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

    @media (max-width: 992px) {
      :root {
        --header-h: 64px;
      }

      .nav-toggle {
        display: flex;
      }

      .main-nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: rgba(11, 15, 25, 0.98);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 20px 24px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
        max-height: calc(100vh - var(--header-h));
        overflow-y: auto;
      }

      .main-nav.open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
      }

      .main-nav .nav-cta {
        order: -1;
        margin: 0 0 14px;
        justify-content: center;
      }

      .main-nav a {
        padding: 14px 4px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        font-size: 16px;
      }

      .main-nav a::after {
        display: none;
      }

      .hero {
        padding-top: 170px;
        padding-bottom: 90px;
        min-height: 0;
      }

      .hero-title {
        font-size: 44px;
      }

      .hero-subtitle {
        font-size: 17px;
      }

      .split-row {
        grid-template-columns: 1fr;
        gap: 32px;
        margin-bottom: 48px;
      }

      .split-row.reversed .split-media {
        order: 0;
      }

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

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

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

    @media (max-width: 767px) {
      :root {
        --header-h: 60px;
      }

      .section {
        padding: 60px 0;
      }

      .section-title {
        font-size: 28px;
      }

      .hero {
        padding-top: 130px;
        padding-bottom: 70px;
      }

      .hero-title {
        font-size: 34px;
      }

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

      .hero-actions {
        flex-direction: column;
        align-items: stretch;
      }

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

      .scroll-hint {
        display: none;
      }

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

      .card-lg {
        grid-column: span 1;
      }

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

      .reward-panel {
        padding: 28px 20px;
      }

      .cta {
        padding: 70px 0;
      }

      .cta h2 {
        font-size: 28px;
      }

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

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 34px;
      }

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