/* roulang page: index */
/* ================= 设计变量 ================= */
:root {
  --bg-dark: #0B1220;
  --bg-darker: #080E1A;
  --panel-dark: #111D33;
  --panel-deep: #0E1830;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-bg-strong: rgba(255,255,255,0.10);
  --glass-border: rgba(255,255,255,0.14);
  --glass-border-hover: rgba(255,255,255,0.22);
  --primary: #38BDF8;
  --primary-deep: #3B82F6;
  --accent: #14B8A6;
  --accent-light: #2DD4BF;
  --amber: #F59E0B;
  --text-light: #F1F5F9;
  --text-muted: #94A3B8;
  --text-muted-2: #64748B;
  --nav-bg: #FFFFFF;
  --nav-border: #E2E8F0;
  --text-dark: #0F172A;
  --text-gray: #475569;
  --text-gray-light: #64748B;
  --radius-btn: 10px;
  --radius-input: 12px;
  --radius-card: 16px;
  --radius-img: 8px;
  --radius-badge: 999px;
  --shadow-card: 0 8px 24px rgba(0,0,0,0.30);
  --shadow-glass: 0 8px 24px rgba(8,14,26,0.45);
  --shadow-btn-glow: 0 4px 24px rgba(20,184,166,0.35);
  --shadow-btn-glow-lg: 0 8px 32px rgba(20,184,166,0.45);
  --space-section: 104px;
  --space-section-md: 72px;
  --space-section-sm: 48px;
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-en: "Inter", "Space Grotesk", "DIN Alternate", sans-serif;
}

/* ================= 基础重置 ================= */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-light);
  background:
    linear-gradient(rgba(56,189,248,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,189,248,0.035) 1px, transparent 1px),
    var(--bg-dark);
  background-size: 72px 72px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: all .25s ease; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 15px; color: var(--text-light); }
ul, ol { list-style: none; }
::selection { background: rgba(20,184,166,0.35); color: #fff; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

/* ================= 容器与通用 ================= */
.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 0; position: relative; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--accent-light);
  background: rgba(20,184,166,0.1);
  border: 1px solid rgba(20,184,166,0.25);
  padding: 6px 18px;
  border-radius: var(--radius-badge);
  margin-bottom: 18px;
  text-transform: uppercase;
}
.section-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-light);
  letter-spacing: -0.02em;
}
.section-desc {
  max-width: 640px;
  margin: 16px auto 0;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1.8;
}
.section-title .brand-hl,
.hero h1 .brand-hl {
  font-family: var(--font-en);
  background: linear-gradient(120deg, #38BDF8, #14B8A6);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}

/* ================= 按钮 ================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  transition: all .25s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn-lg { padding: 15px 36px; font-size: 17px; border-radius: 12px; }
.btn-sm { padding: 9px 20px; font-size: 14px; border-radius: var(--radius-btn); }
.btn-block { width: 100%; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #0F9E90);
  color: #FFFFFF;
  box-shadow: var(--shadow-btn-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn-glow-lg);
}
.btn-primary:active { transform: scale(0.98); }
.btn-outline {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.35);
  color: var(--text-light);
  backdrop-filter: blur(8px);
}
.btn-outline:hover {
  border-color: var(--accent-light);
  color: var(--accent-light);
  background: rgba(20,184,166,0.08);
  transform: translateY(-2px);
}
.btn-outline:active { transform: scale(0.98); }
.btn-light {
  background: var(--nav-bg);
  color: var(--text-dark);
  box-shadow: 0 4px 16px rgba(15,23,42,0.12);
}
.btn-light:hover {
  background: #F1F5F9;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(15,23,42,0.18);
}
.btn-light:active { transform: scale(0.98); }

/* ================= 玻璃卡片 ================= */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-glass);
  transition: all .3s ease;
}
.glass-card:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(8,14,26,0.55);
}

/* ================= 顶栏导航 ================= */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: 0 2px 8px rgba(15,23,42,0.04);
}
.nav {
  display: flex;
  align-items: center;
  height: 72px;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--text-dark);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(20,184,166,0.16), rgba(56,189,248,0.10));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1.5px solid rgba(20,184,166,0.5);
}
.logo-text { font-family: var(--font-en); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 8px;
}
.nav-links a {
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-gray);
  border-radius: 8px;
  border: 1px solid transparent;
  transition: all .25s ease;
}
.nav-links a:hover { color: var(--accent); background: rgba(20,184,166,0.06); }
.nav-links a.active {
  color: var(--accent);
  background: rgba(20,184,166,0.08);
  border-color: rgba(20,184,166,0.2);
  font-weight: 600;
}
.nav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 14px;
}
.search-box { position: relative; }
.search-box svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 16px;
  height: 16px;
  color: var(--text-gray-light);
  pointer-events: none;
}
.search-box input {
  width: 220px;
  height: 40px;
  border-radius: var(--radius-badge);
  border: 1px solid var(--nav-border);
  background: #F8FAFC;
  padding: 0 16px 0 42px;
  font-size: 14px;
  color: var(--text-dark);
  transition: all .25s ease;
}
.search-box input::placeholder { color: var(--text-gray-light); }
.search-box input:focus {
  border-color: var(--accent);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(20,184,166,0.15);
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 10px;
  border: 1px solid var(--nav-border);
  background: #F8FAFC;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: all .3s ease;
}
.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); }

/* ================= Hero ================= */
.hero {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: center;
  background:
    linear-gradient(115deg, rgba(8,14,26,0.88) 20%, rgba(11,18,32,0.55) 55%, rgba(14,24,48,0.45) 100%),
    url('/assets/images/backpic/back-1.png') center 30% / cover no-repeat;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(420px 280px at 78% 22%, rgba(56,189,248,0.10), transparent 70%),
    radial-gradient(520px 360px at 85% 75%, rgba(20,184,166,0.08), transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: "H";
  position: absolute;
  right: 4%;
  bottom: 8%;
  font-size: 260px;
  font-weight: 900;
  font-family: var(--font-en);
  color: rgba(56,189,248,0.045);
  line-height: 1;
  pointer-events: none;
  user-select: none;
}
.hero-inner { position: relative; z-index: 2; padding-top: 80px; padding-bottom: 80px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: #A5F3FC;
  background: rgba(56,189,248,0.12);
  border: 1px solid rgba(56,189,248,0.3);
  padding: 7px 18px;
  border-radius: var(--radius-badge);
  margin-bottom: 24px;
  animation: fadeUp .6s ease both;
}
.hero h1 {
  font-size: 54px;
  font-weight: 900;
  line-height: 1.15;
  color: var(--text-light);
  letter-spacing: -0.02em;
  max-width: 720px;
  animation: fadeUp .7s .1s ease both;
}
.hero-sub {
  margin-top: 22px;
  font-size: 18px;
  line-height: 1.9;
  color: var(--text-muted);
  max-width: 640px;
  animation: fadeUp .7s .2s ease both;
}
.hero-ctas {
  display: flex;
  gap: 16px;
  margin-top: 36px;
  flex-wrap: wrap;
  animation: fadeUp .7s .3s ease both;
}
.hero-info {
  display: flex;
  gap: 14px;
  margin-top: 56px;
  flex-wrap: wrap;
  animation: fadeUp .7s .4s ease both;
}
.info-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-badge);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  backdrop-filter: blur(10px);
  font-size: 14px;
  color: #CBD5E1;
}
.info-chip svg { width: 15px; height: 15px; color: var(--accent-light); }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: none; }
}

/* ================= 合作伙伴 ================= */
.partners {
  padding: 56px 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: var(--bg-darker);
}
.partners-label {
  text-align: center;
  font-size: 13px;
  letter-spacing: 3px;
  color: var(--text-muted-2);
  margin-bottom: 32px;
  text-transform: uppercase;
}
.partner-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}
.partner-logo {
  padding: 16px 28px;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  color: rgba(148,163,184,0.5);
  letter-spacing: 1px;
  cursor: default;
  transition: all .4s ease;
  user-select: none;
}
.partner-logo:hover {
  color: var(--text-light);
  border-color: rgba(56,189,248,0.3);
  background: rgba(56,189,248,0.06);
  opacity: 1;
}

/* ================= 议程时间线 ================= */
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding-left: 0;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 96px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, rgba(56,189,248,0.5), rgba(20,184,166,0.3), rgba(56,189,248,0.1));
  border-radius: 2px;
}
.timeline-item {
  position: relative;
  display: flex;
  gap: 36px;
  margin-bottom: 28px;
  padding-left: 0;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-time {
  flex-shrink: 0;
  width: 96px;
  text-align: right;
  padding-top: 20px;
  position: relative;
}
.timeline-time .time {
  font-family: var(--font-en);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent-light);
  letter-spacing: -0.02em;
}
.timeline-time .phase {
  display: block;
  font-size: 12px;
  color: var(--text-muted-2);
  margin-top: 2px;
  letter-spacing: 1px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: 84px;
  top: 30px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(20,184,166,0.18), 0 0 16px rgba(20,184,166,0.5);
  z-index: 1;
}
.timeline-card {
  flex: 1;
  padding: 24px 28px;
}
.timeline-card h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 6px;
}
.timeline-card .timeline-speaker {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
  background: rgba(56,189,248,0.1);
  border: 1px solid rgba(56,189,248,0.2);
  padding: 3px 12px;
  border-radius: var(--radius-badge);
  margin-bottom: 10px;
}
.timeline-card p {
  font-size: 14.5px;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ================= 嘉宾 ================= */
.speaker-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.speaker-card {
  padding: 26px 22px 24px;
  text-align: center;
  border-radius: var(--radius-card);
}
.speaker-photo {
  width: 112px;
  height: 112px;
  margin: 0 auto 18px;
  border-radius: 50%;
  overflow: hidden;
  border: 3px solid rgba(20,184,166,0.4);
  box-shadow: 0 0 0 6px rgba(20,184,166,0.08);
  background: var(--panel-deep);
}
.speaker-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.88);
  transition: all .4s ease;
}
.speaker-card:hover .speaker-photo img { filter: saturate(1); transform: scale(1.05); }
.speaker-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 4px;
}
.speaker-role {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--accent-light);
  background: rgba(20,184,166,0.1);
  border: 1px solid rgba(20,184,166,0.2);
  padding: 3px 12px;
  border-radius: var(--radius-badge);
  margin-bottom: 10px;
}
.speaker-org {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.speaker-card .speaker-desc {
  font-size: 13.5px;
  color: var(--text-muted-2);
  line-height: 1.7;
  margin-bottom: 14px;
}
.speaker-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
}
.speaker-link:hover { color: var(--accent-light); }

/* ================= 票种对比 ================= */
.ticket-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.ticket-card {
  position: relative;
  padding: 36px 30px 30px;
  text-align: center;
  display: flex;
  flex-direction: column;
}
.ticket-card .ticket-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 16px;
}
.ticket-card .ticket-price {
  font-family: var(--font-en);
  font-size: 44px;
  font-weight: 800;
  color: var(--text-light);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 4px;
}
.ticket-card .ticket-price .symbol {
  font-size: 20px;
  vertical-align: top;
  margin-right: 2px;
  color: var(--text-muted);
}
.ticket-card .ticket-per {
  font-size: 13px;
  color: var(--text-muted-2);
  margin-bottom: 24px;
}
.ticket-card .ticket-features {
  text-align: left;
  margin-bottom: 28px;
  flex: 1;
}
.ticket-card .ticket-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 0;
  font-size: 14.5px;
  color: #CBD5E1;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.ticket-card .ticket-features li:last-child { border-bottom: none; }
.ticket-card .ticket-features svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 5px;
  color: var(--accent);
}
.ticket-card .ticket-features .no { color: var(--text-muted-2); opacity: 0.5; }
.ticket-card .btn { width: 100%; }
.ticket-card.featured {
  background: linear-gradient(160deg, rgba(20,184,166,0.12), rgba(56,189,248,0.05) 55%, rgba(255,255,255,0.06));
  border: 1px solid rgba(20,184,166,0.45);
  box-shadow: 0 0 0 2px rgba(20,184,166,0.15), 0 16px 48px rgba(20,184,166,0.15);
}
.ticket-card.featured:hover {
  box-shadow: 0 0 0 2px rgba(20,184,166,0.25), 0 20px 56px rgba(20,184,166,0.22);
}
.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--amber), #D97706);
  color: #FFFFFF;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 6px 18px;
  border-radius: var(--radius-badge);
  box-shadow: 0 4px 16px rgba(245,158,11,0.35);
  white-space: nowrap;
}

/* ================= 报名 CTA ================= */
.register-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.register-info { padding-right: 24px; }
.register-info .section-tag { margin-bottom: 14px; }
.register-info h2 {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-light);
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.register-info .register-desc {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 28px;
  line-height: 1.9;
}
.register-points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: 15px;
  color: #CBD5E1;
}
.register-points svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 5px;
  color: var(--accent-light);
}
.register-card {
  padding: 40px 36px;
  position: relative;
  overflow: hidden;
}
.register-card::before {
  content: "H";
  position: absolute;
  right: -30px;
  bottom: -40px;
  font-size: 160px;
  font-weight: 900;
  font-family: var(--font-en);
  color: rgba(56,189,248,0.04);
  line-height: 1;
  pointer-events: none;
}
.form-group { margin-bottom: 20px; position: relative; z-index: 1; }
.form-group label {
  display: block;
  font-size: 13.5px;
  font-weight: 500;
  color: #CBD5E1;
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--radius-input);
  border: 1px solid rgba(255,255,255,0.12);
  background: rgba(0,0,0,0.25);
  color: var(--text-light);
  transition: all .25s ease;
  appearance: none;
  -webkit-appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394A3B8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 42px;
}
.form-group select option { background: var(--panel-dark); color: var(--text-light); }
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(148,163,184,0.5); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(20,184,166,0.22);
  background: rgba(0,0,0,0.35);
}
.form-group textarea { min-height: 84px; resize: vertical; }
.register-card .btn { margin-top: 8px; position: relative; z-index: 1; }
.form-privacy {
  text-align: center;
  font-size: 12.5px;
  color: var(--text-muted-2);
  margin-top: 16px;
  position: relative;
  z-index: 1;
}
.form-success {
  text-align: center;
  padding: 48px 20px;
  position: relative;
  z-index: 1;
}
.form-success .success-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(20,184,166,0.15);
  border: 2px solid var(--accent);
  color: var(--accent-light);
  font-size: 28px;
  margin-bottom: 20px;
}
.form-success h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 10px;
}
.form-success p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.8;
}

/* ================= 资讯列表 ================= */
.news-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.news-card {
  display: block;
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-glass);
  transition: all .3s ease;
}
.news-card:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 48px rgba(8,14,26,0.55);
}
.news-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--panel-dark);
}
.news-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.news-card:hover .news-cover img { transform: scale(1.06); }
.news-cat {
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-light);
  background: rgba(11,18,32,0.72);
  border: 1px solid rgba(255,255,255,0.2);
  backdrop-filter: blur(8px);
  padding: 5px 14px;
  border-radius: var(--radius-badge);
}
.news-body { padding: 20px 22px 22px; }
.news-body h3 {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-light);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 51px;
}
.news-body p {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
  min-height: 46px;
}
.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 14px;
}
.news-meta time {
  font-size: 12.5px;
  color: var(--text-muted-2);
  font-family: var(--font-en);
}
.news-meta .read-more {
  font-size: 13px;
  font-weight: 500;
  color: var(--primary);
}
.news-card:hover .news-meta .read-more { color: var(--accent-light); }
.news-empty {
  text-align: center;
  padding: 72px 24px;
  color: var(--text-muted);
}
.news-empty .empty-icon {
  display: block;
  font-size: 36px;
  color: rgba(148,163,184,0.4);
  margin-bottom: 14px;
}
.news-empty p { font-size: 16px; }

/* ================= FAQ ================= */
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item {
  margin-bottom: 16px;
  border-radius: var(--radius-card);
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  transition: all .3s ease;
  overflow: hidden;
}
.faq-item:hover { border-color: var(--glass-border-hover); }
.faq-item.open { border-color: rgba(20,184,166,0.4); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 26px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-light);
  cursor: pointer;
  transition: all .3s ease;
}
.faq-question:hover { color: var(--accent-light); }
.faq-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--accent-light);
  font-size: 18px;
  transition: transform .35s ease, background .3s ease;
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: rgba(20,184,166,0.15); border-color: var(--accent); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
}
.faq-answer-inner {
  padding: 0 26px 24px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.85;
}

/* ================= 页脚 ================= */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 64px 0 0;
  position: relative;
}
.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(56,189,248,0.35), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-logo { color: var(--text-light); font-size: 20px; margin-bottom: 14px; }
.footer-logo .logo-mark {
  border-color: rgba(20,184,166,0.6);
  background: rgba(20,184,166,0.12);
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted-2);
  line-height: 1.85;
  max-width: 300px;
  margin-top: 14px;
}
.footer-col h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-light);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a {
  font-size: 14px;
  color: var(--text-muted);
  transition: all .25s ease;
}
.footer-col ul a:hover { color: var(--accent-light); padding-left: 6px; }
.footer-col ul li span {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 24px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted-2);
}
.footer-bottom .footer-links {
  display: flex;
  gap: 24px;
}
.footer-bottom .footer-links a {
  font-size: 13px;
  color: var(--text-muted-2);
}
.footer-bottom .footer-links a:hover { color: var(--accent-light); }

/* ================= 响应式断点 ================= */
@media (max-width: 1200px) {
  .speaker-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .ticket-grid { gap: 20px; }
}
@media (max-width: 1024px) {
  :root { --space-section: var(--space-section-md); }
  .search-box input { width: 180px; }
  .nav-links a { padding: 8px 12px; font-size: 14px; }
  .register-wrap { grid-template-columns: 1fr; gap: 40px; }
  .register-info { padding-right: 0; text-align: center; }
  .register-points { max-width: 520px; margin: 0 auto; text-align: left; }
  .hero h1 { font-size: 44px; }
  .section-title { font-size: 32px; }
  .timeline::before { left: 88px; }
  .timeline-item::before { left: 76px; }
  .timeline-time { width: 88px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 20px;
    display: none;
    border-bottom: 1px solid var(--nav-border);
    box-shadow: 0 16px 32px rgba(15,23,42,0.12);
    z-index: 999;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 12px; font-size: 16px; border-bottom: 1px solid #F1F5F9; border-radius: 0; }
  .nav-links a:last-child { border-bottom: none; }
  .nav-links a.active { background: rgba(20,184,166,0.06); border-left: 3px solid var(--accent); }
  .search-box { display: none; }
  .hero { min-height: 580px; }
  .hero h1 { font-size: 36px; }
  .hero-sub { font-size: 16px; }
  .hero-ctas .btn { width: 100%; }
  .hero-info { flex-direction: column; align-items: flex-start; }
  .timeline { padding-left: 0; }
  .timeline::before { left: 26px; }
  .timeline-item { flex-direction: column; gap: 0; padding-left: 56px; }
  .timeline-time { width: auto; text-align: left; padding-top: 0; margin-bottom: 0; }
  .timeline-time .time { font-size: 18px; }
  .timeline-time .phase { display: inline; margin-left: 8px; }
  .timeline-item::before { left: 24px; top: 12px; width: 8px; height: 8px; }
  .timeline-card { margin-top: 8px; }
  .speaker-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .ticket-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .ticket-card.featured { order: -1; }
  .news-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .register-card { padding: 32px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { --space-section: var(--space-section-sm); }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .logo { font-size: 18px; }
  .logo-mark { width: 32px; height: 32px; }
  .hero h1 { font-size: 31px; }
  .hero-sub { font-size: 15px; }
  .hero { min-height: 540px; }
  .info-chip { width: 100%; }
  .section-title { font-size: 26px; }
  .register-info h2 { font-size: 26px; }
  .timeline-item { padding-left: 48px; }
  .timeline::before { left: 22px; }
  .timeline-item::before { left: 20px; }
  .register-card { padding: 26px 18px; }
  .news-body h3 { -webkit-line-clamp: 2; }
  .footer-grid { gap: 28px; }
}

/* roulang page: category1 */
:root {
  --bg-deep: #0B1220;
  --bg-darker: #080E1A;
  --panel-1: #111D33;
  --panel-2: #0E1830;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.14);
  --glass-border-hover: rgba(255,255,255,0.24);
  --primary: #38BDF8;
  --primary-deep: #3B82F6;
  --accent: #14B8A6;
  --accent-light: #2DD4BF;
  --amber: #F59E0B;
  --text-main: #F1F5F9;
  --text-sub: #94A3B8;
  --nav-bg: #FFFFFF;
  --nav-border: #E2E8F0;
  --nav-text: #334155;
  --nav-text-active: #0F172A;
  --radius-btn: 10px;
  --radius-input: 12px;
  --radius-card: 16px;
  --radius-img: 8px;
  --radius-badge: 999px;
  --shadow-card: 0 8px 24px rgba(8,14,26,0.45);
  --shadow-btn: 0 4px 20px rgba(20,184,166,0.35);
  --transition: 0.3s cubic-bezier(0.25,0.46,0.45,0.94);
  --font-cn: "PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-en: "Inter","DIN Alternate","Space Grotesk",var(--font-cn);
}
*,*::before,*::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-cn);
  background: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); }
button { font-family: inherit; }
input,select,textarea { font-family: inherit; }
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 96px 0; position: relative; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-btn);
  cursor: pointer;
  text-decoration: none;
  padding: 12px 24px;
  font-size: 15px;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-primary {
  background: linear-gradient(135deg, #14B8A6, #0D9488);
  color: #fff;
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(20,184,166,0.5);
}
.btn-primary:active { transform: scale(0.98); }
.btn-primary:focus-visible,
.btn-ghost:focus-visible,
.text-link:focus-visible,
.nav-links a:focus-visible,
.logo:focus-visible,
.topic-link:focus-visible,
.cta-row .btn:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 2px;
}
.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--text-main);
}
.btn-ghost:hover {
  border-color: var(--accent-light);
  color: var(--accent-light);
  background: rgba(20,184,166,0.08);
  transform: translateY(-2px);
}
.btn-ghost:active { transform: scale(0.98); }
/* ===== 导航 ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: 0 2px 8px rgba(15,23,42,0.04);
}
.nav {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-mark {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(20,184,166,0.1);
  border-radius: 10px;
  border: 1px solid rgba(20,184,166,0.2);
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--nav-text-active);
  letter-spacing: -0.02em;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  gap: 6px;
  margin-left: 24px;
}
.nav-links a {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 15px;
  color: var(--nav-text);
  text-decoration: none;
  font-weight: 500;
  transition: var(--transition);
}
.nav-links a:hover {
  color: var(--nav-text-active);
  background: #F1F5F9;
}
.nav-links a.active {
  color: #0F766E;
  background: rgba(20,184,166,0.1);
  font-weight: 600;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-left: auto;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #F1F5F9;
  border-radius: 999px;
  padding: 8px 14px;
  width: 220px;
  border: 1px solid transparent;
  transition: var(--transition);
}
.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(20,184,166,0.18);
}
.search-box svg {
  width: 16px;
  height: 16px;
  color: #64748B;
  flex-shrink: 0;
}
.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 14px;
  color: var(--nav-text-active);
  width: 100%;
}
.search-box input::placeholder { color: #94A3B8; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  border-radius: 8px;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--nav-text-active);
  border-radius: 2px;
  transition: var(--transition);
}
.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); }
/* ===== 分类 Hero ===== */
.category-hero {
  min-height: 260px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 60px 0;
  background-image:
    linear-gradient(180deg, rgba(11,18,32,0.35), rgba(8,14,26,0.94)),
    url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.category-hero::before {
  content: "H";
  position: absolute;
  font-family: var(--font-en);
  font-size: 220px;
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(56,189,248,0.10);
  right: 6%;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  user-select: none;
}
.category-hero .hero-inner { position: relative; z-index: 2; }
.category-hero h1 {
  font-size: 46px;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}
.hero-desc {
  font-size: 17px;
  color: var(--text-sub);
  max-width: 620px;
  line-height: 1.7;
}
/* ===== 通用板块头 ===== */
.section-head {
  max-width: 760px;
  margin-bottom: 48px;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-light);
  letter-spacing: 0.06em;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.section-tag::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.section-head h2 {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.section-head p {
  color: var(--text-sub);
  font-size: 16px;
  max-width: 640px;
}
/* ===== 不对称图文 ===== */
.split-section {
  background:
    radial-gradient(ellipse at 20% 30%, rgba(56,189,248,0.06), transparent 60%),
    radial-gradient(ellipse at 80% 70%, rgba(20,184,166,0.05), transparent 55%);
  background-color: transparent;
}
.split-grid {
  display: flex;
  gap: 56px;
  align-items: center;
}
.split-grid > .split-media { flex: 7; }
.split-grid > .split-content { flex: 5; }
.split-invert .split-grid { flex-direction: row-reverse; }
.split-invert .split-grid > .split-media { flex: 5; }
.split-invert .split-grid > .split-content { flex: 7; }
.split-media {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  box-shadow: 0 16px 40px rgba(8,14,26,0.5);
  border: 1px solid rgba(255,255,255,0.08);
}
.split-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.split-media:hover img { transform: scale(1.03); }
.media-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(11,18,32,0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.22);
  color: #fff;
  padding: 5px 14px;
  border-radius: var(--radius-badge);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.split-content {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 36px;
  transition: var(--transition);
}
.split-content:hover {
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(8,14,26,0.6);
}
.split-content .section-tag { margin-bottom: 10px; }
.split-content h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}
.split-content p {
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 20px;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-light);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  transition: var(--transition);
}
.text-link svg { width: 16px; height: 16px; transition: transform 0.3s ease; }
.text-link:hover { color: #fff; }
.text-link:hover svg { transform: translateX(4px); }
/* ===== 主题列表 ===== */
.topic-section {
  background:
    linear-gradient(rgba(56,189,248,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,189,248,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  background-color: var(--bg-deep);
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.topic-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.topic-row {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 28px 28px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-card);
  transition: var(--transition);
}
.topic-row:hover {
  border-color: rgba(20,184,166,0.35);
  background: rgba(20,184,166,0.06);
  box-shadow: var(--shadow-card);
  transform: translateY(-3px);
}
.topic-icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(20,184,166,0.12);
  border: 1px solid rgba(20,184,166,0.18);
  color: var(--accent-light);
}
.topic-icon svg { width: 24px; height: 24px; }
.topic-info { flex: 1; min-width: 0; }
.topic-info h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 6px;
  color: #fff;
}
.topic-info p {
  color: var(--text-sub);
  font-size: 15px;
  margin: 0;
  line-height: 1.7;
}
.topic-link {
  color: var(--accent-light);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 0;
  transition: var(--transition);
}
.topic-link:hover { color: #fff; }
.topic-link svg { width: 14px; height: 14px; transition: transform 0.3s; }
.topic-link:hover svg { transform: translateX(4px); }
/* ===== CTA 区 ===== */
.cta-section {
  padding: 80px 0;
  background:
    radial-gradient(ellipse at 50% 100%, rgba(20,184,166,0.08), transparent 60%),
    var(--bg-deep);
  border-top: 1px solid rgba(255,255,255,0.05);
}
.cta-row {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  align-items: center;
}
/* ===== 页脚 ===== */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-logo .logo-text { color: #F1F5F9; }
.footer-brand p {
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.8;
  max-width: 340px;
}
.footer-col h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
  color: #F1F5F9;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a,
.footer-col span {
  color: var(--text-sub);
  text-decoration: none;
  font-size: 14px;
  transition: var(--transition);
  line-height: 1.6;
}
.footer-col a:hover { color: var(--accent-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  color: var(--text-sub);
  font-size: 13px;
}
.footer-links { display: flex; gap: 20px; }
.footer-links a {
  color: var(--text-sub);
  font-size: 13px;
  text-decoration: none;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--accent-light); }
/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .container { padding: 0 20px; }
  .section { padding: 72px 0; }
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--nav-border);
    box-shadow: 0 10px 24px rgba(15,23,42,0.08);
    flex-direction: column;
    padding: 16px;
    margin-left: 0;
    gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 16px; }
  .nav-toggle { display: flex; }
  .search-box { width: 160px; }
  .split-grid,
  .split-invert .split-grid {
    gap: 32px;
  }
  .split-grid > .split-media,
  .split-invert .split-grid > .split-media,
  .split-grid > .split-content,
  .split-invert .split-grid > .split-content {
    flex: 1;
  }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .section { padding: 48px 0; }
  .category-hero { min-height: 220px; padding: 40px 0; }
  .category-hero h1 { font-size: 32px; }
  .hero-desc { font-size: 15px; }
  .section-head { margin-bottom: 32px; }
  .section-head h2 { font-size: 26px; }
  .split-grid,
  .split-invert .split-grid {
    flex-direction: column;
    gap: 24px;
  }
  .split-content { padding: 24px; }
  .split-content h2 { font-size: 24px; }
  .topic-row { flex-wrap: wrap; gap: 14px; padding: 20px; }
  .topic-icon { width: 44px; height: 44px; }
  .topic-info { width: calc(100% - 60px); }
  .topic-link { margin-left: 58px; }
  .cta-row { flex-direction: column; gap: 14px; }
  .cta-row .btn { width: 100%; max-width: 320px; }
  .footer { padding-top: 48px; }
}
@media (max-width: 520px) {
  .nav { gap: 10px; }
  .logo-text { font-size: 17px; }
  .search-box { display: none; }
  .btn-sm { padding: 7px 13px; font-size: 13px; }
  .category-hero { min-height: 200px; }
  .category-hero h1 { font-size: 28px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
  .footer-links { justify-content: center; }
  .topic-row { flex-direction: column; align-items: flex-start; }
  .topic-info { width: 100%; }
  .topic-link { margin-left: 0; }
}

/* roulang page: article */
:root {
  --teal: #14B8A6;
  --teal-2: #2DD4BF;
  --blue: #38BDF8;
  --blue-2: #3B82F6;
  --ink: #0B1220;
  --ink-2: #080E1A;
  --panel: #111D33;
  --panel-2: #0E1830;
  --glass: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --glass-border-light: rgba(255,255,255,0.22);
  --text-1: #F1F5F9;
  --text-2: #94A3B8;
  --text-3: #CBD5E1;
  --amber: #F59E0B;
  --nav-bg: #FFFFFF;
  --nav-border: #E2E8F0;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-card: 0 8px 24px rgba(8,14,26,0.45);
  --shadow-hover: 0 16px 40px rgba(8,14,26,0.65);
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Space Grotesk', 'JetBrains Mono', 'Courier New', monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background-color: var(--ink);
  background-image:
    radial-gradient(circle at 25% 30%, rgba(20,184,166,0.09), transparent 42%),
    radial-gradient(circle at 76% 62%, rgba(56,189,248,0.07), transparent 36%),
    linear-gradient(rgba(56,189,248,0.032) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,189,248,0.032) 1px, transparent 1px);
  background-size: auto, auto, 60px 60px, 60px 60px;
  background-attachment: fixed;
  color: var(--text-1);
  line-height: 1.75;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
input, button, textarea, select { font-family: inherit; }
button { cursor: pointer; border: none; background: none; }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  transition: transform .25s, box-shadow .25s, background .25s, color .25s, border-color .25s;
}
.btn-sm { padding: 9px 18px; font-size: 14px; border-radius: 10px; }
.btn-primary {
  background: linear-gradient(135deg, var(--teal), #0F9488);
  color: #fff;
  box-shadow: 0 4px 16px rgba(20,184,166,0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 26px rgba(20,184,166,0.5);
}
.btn-primary:active { transform: scale(0.98); }
.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.22);
  color: var(--text-2);
}
.btn-ghost:hover {
  border-color: var(--teal);
  color: var(--text-1);
  background: rgba(20,184,166,0.12);
}
.btn-ghost:active { transform: scale(0.98); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 40px; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  color: var(--teal-2);
  background: rgba(20,184,166,0.12);
  padding: 5px 16px;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: .5px;
}
.section-head h2 { font-size: 32px; font-weight: 700; color: var(--text-1); margin-bottom: 10px; line-height: 1.3; }
.section-head p { font-size: 15px; color: var(--text-2); }

/* Header */
.header {
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: 0 2px 8px rgba(15,23,42,0.04);
  position: sticky;
  top: 0;
  z-index: 100;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 72px;
}
.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(20,184,166,0.12);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: #0F172A;
  letter-spacing: .5px;
  white-space: nowrap;
}
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: #475569;
  padding: 8px 2px;
  border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--teal); }
.nav-links a.active { color: #0F172A; border-bottom-color: var(--teal); font-weight: 600; }
.nav-right { display: flex; align-items: center; gap: 14px; }
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #F1F5F9;
  border-radius: 999px;
  padding: 8px 16px;
  width: 220px;
  border: 1px solid transparent;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.search-box svg { width: 16px; height: 16px; color: var(--text-2); flex-shrink: 0; }
.search-box input { border: none; background: none; outline: none; font-size: 14px; color: #0F172A; width: 100%; }
.search-box:focus-within {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(20,184,166,0.15);
  background: #fff;
}
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; border-radius: 8px; }
.nav-toggle span { width: 20px; height: 2px; background: #0F172A; display: block; transition: transform .25s, opacity .25s; }

/* Breadcrumb */
.breadcrumb-bar {
  background: rgba(17,29,51,0.72);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 15px 0;
  font-size: 14px;
  color: var(--text-2);
  overflow: hidden;
}
.breadcrumb a { color: #7DD3FC; transition: color .2s; white-space: nowrap; }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb .sep { color: rgba(255,255,255,0.3); flex-shrink: 0; }
.breadcrumb .current {
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 360px;
}

/* Article main */
.article-main { position: relative; padding: 56px 0 80px; }
.article-main::after {
  content: 'H';
  position: absolute;
  right: 4%;
  top: 20px;
  font-size: 160px;
  font-weight: 900;
  line-height: 1;
  color: rgba(56,189,248,0.05);
  pointer-events: none;
  z-index: 0;
  font-family: var(--font-sans);
}
.article-main .container { position: relative; z-index: 1; }
.article-card {
  max-width: 920px;
  margin: 0 auto;
  background: var(--glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-card);
}
.article-header h1 {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-1);
  letter-spacing: .5px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  padding: 18px 0;
  margin-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  color: var(--text-2);
  font-size: 14px;
}
.meta-item { display: inline-flex; align-items: center; gap: 8px; }
.meta-item i { font-style: normal; color: #7DD3FC; }

/* Article body typography */
.article-body {
  margin-top: 32px;
  font-size: 16px;
  line-height: 1.88;
  color: var(--text-3);
}
.article-body h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 40px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--teal);
  color: var(--text-1);
  line-height: 1.35;
}
.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 32px 0 12px;
  color: var(--text-1);
  line-height: 1.4;
}
.article-body p { margin: 0 0 18px; color: var(--text-3); }
.article-body blockquote {
  margin: 24px 0;
  padding: 16px 24px;
  border-left: 3px solid var(--teal);
  background: rgba(20,184,166,0.08);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-3);
  font-style: normal;
}
.article-body img { border-radius: 12px; max-width: 100%; height: auto; margin: 24px 0; }
.article-body ul, .article-body ol { padding-left: 24px; margin: 16px 0 24px; }
.article-body ul li, .article-body ol li { margin-bottom: 10px; color: var(--text-3); }
.article-body ul li::marker { color: var(--teal); }
.article-body ol li::marker { color: var(--teal); font-weight: 600; }
.article-body a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; transition: color .2s; }
.article-body a:hover { color: var(--teal-2); }
.article-body code {
  background: rgba(56,189,248,0.12);
  padding: 3px 8px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: #7DD3FC;
}
.article-body pre {
  background: var(--panel-2);
  border: 1px solid rgba(56,189,248,0.18);
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin: 24px 0;
}
.article-body pre code {
  background: none;
  padding: 0;
  color: var(--text-3);
  font-size: 14px;
  line-height: 1.7;
}
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; }
.article-body th, .article-body td { padding: 12px 16px; border: 1px solid rgba(255,255,255,0.1); text-align: left; }
.article-body th { background: rgba(56,189,248,0.08); color: var(--text-1); font-weight: 600; }
.article-body td { color: var(--text-3); }

/* Not found */
.not-found {
  max-width: 680px;
  margin: 48px auto 56px;
  text-align: center;
  padding: 72px 48px;
  background: var(--glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}
.not-found h1 { font-size: 30px; font-weight: 700; color: var(--text-1); margin-bottom: 24px; }

/* Related */
.related-section {
  padding: 72px 0 96px;
  background: linear-gradient(180deg, rgba(8,14,26,0.45), rgba(8,14,26,0.88));
  border-top: 1px solid rgba(255,255,255,0.08);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.related-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .25s, border-color .25s, box-shadow .25s;
  display: flex;
  flex-direction: column;
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(20,184,166,0.4);
  box-shadow: var(--shadow-hover);
}
.related-cover { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.related-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.related-card:hover .related-cover img { transform: scale(1.03); }
.card-tag {
  position: absolute;
  left: 14px;
  top: 14px;
  background: rgba(11,18,32,0.72);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--text-1);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.18);
}
.related-card h3 {
  font-size: 17px;
  font-weight: 600;
  padding: 20px 20px 8px;
  line-height: 1.5;
  color: var(--text-1);
}
.related-card p {
  font-size: 14px;
  color: var(--text-2);
  padding: 0 20px;
  margin-bottom: 16px;
  flex: 1;
}
.card-link {
  font-size: 14px;
  color: var(--teal-2);
  padding: 0 20px 20px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .25s, color .25s;
}
.related-card:hover .card-link { gap: 10px; color: var(--blue); }
.back-list-wrap { margin-top: 44px; text-align: center; }

/* Footer */
.footer {
  background: var(--ink-2);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-logo { color: var(--text-1); font-size: 18px; }
.footer-logo .logo-mark { background: rgba(20,184,166,0.15); }
.footer-brand p {
  font-size: 14px;
  color: var(--text-2);
  margin-top: 16px;
  max-width: 320px;
  line-height: 1.75;
}
.footer-col h3 { font-size: 16px; font-weight: 600; color: var(--text-1); margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col a, .footer-col span { font-size: 14px; color: var(--text-2); transition: color .2s; }
.footer-col a:hover { color: var(--teal-2); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 24px 0;
  border-top: 1px solid rgba(255,255,255,0.06);
  color: #64748B;
  font-size: 13px;
}
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: #64748B; transition: color .2s; }
.footer-links a:hover { color: var(--teal-2); }

/* Responsive */
@media (max-width: 1024px) {
  .container { padding-left: 20px; padding-right: 20px; }
  .nav-links { gap: 16px; }
  .search-box { width: 180px; }
  .article-card { padding: 40px 32px; }
  .footer-grid { gap: 32px; }
}
@media (max-width: 768px) {
  .nav { height: 64px; gap: 12px; }
  .logo-text { font-size: 16px; }
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--nav-border);
    box-shadow: 0 8px 24px rgba(15,23,42,0.08);
    transform: translateY(-16px);
    opacity: 0;
    visibility: hidden;
    transition: transform .3s, opacity .3s, visibility .3s;
    z-index: 99;
    margin-left: 0;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    max-height: calc(100vh - 64px);
    overflow-y: auto;
  }
  .nav-links a {
    display: block;
    padding: 12px 8px;
    font-size: 16px;
    border-bottom: 1px solid #F1F5F9;
    border-left: 3px solid transparent;
  }
  .nav-links a.active {
    border-left-color: var(--teal);
    background: rgba(20,184,166,0.06);
    border-bottom-color: #F1F5F9;
  }
  .nav-right .search-box { display: none; }
  .nav-right .btn-sm { display: none; }
  .nav-toggle { display: flex; margin-left: auto; }
  .article-main { padding: 40px 0 56px; }
  .article-card { padding: 32px 20px; }
  .article-header h1 { font-size: 28px; line-height: 1.3; }
  .article-meta { gap: 10px 16px; font-size: 13px; }
  .article-body { font-size: 15px; line-height: 1.8; }
  .article-body h2 { font-size: 21px; margin-top: 32px; }
  .article-body h3 { font-size: 18px; margin-top: 24px; }
  .breadcrumb { font-size: 13px; }
  .breadcrumb .current { max-width: 140px; }
  .not-found { padding: 56px 24px; }
  .not-found h1 { font-size: 26px; }
  .related-section { padding: 56px 0 72px; }
  .related-grid { grid-template-columns: 1fr; gap: 20px; }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .section-head h2 { font-size: 25px; }
  .article-header h1 { font-size: 24px; }
  .article-card { padding: 24px 16px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .nav-links { padding-left: 16px; padding-right: 16px; }
}

/* roulang page: category2 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-deep: #0B1220;
  --bg-footer: #080E1A;
  --panel-1: #111D33;
  --panel-2: #0E1830;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --glass-border-hover: rgba(255,255,255,0.22);
  --primary: #38BDF8;
  --accent: #14B8A6;
  --accent-light: #2DD4BF;
  --amber: #F59E0B;
  --text-main: #F1F5F9;
  --text-muted: #94A3B8;
  --nav-bg: #FFFFFF;
  --nav-text: #0F172A;
  --nav-sub: #475569;
  --nav-border: #E2E8F0;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 999px;
  --shadow-card: 0 8px 24px rgba(8,14,26,0.45);
  --shadow-glow: 0 8px 30px rgba(20,184,166,0.28);
  --transition: all 0.25s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Inter", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-main);
  background-color: var(--bg-deep);
  background-image:
    linear-gradient(rgba(56,189,248,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,189,248,0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

ul {
  list-style: none;
}

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

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.narrow {
  max-width: 860px;
}

/* ===== Header / Nav ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  box-shadow: 0 2px 8px rgba(15,23,42,0.04);
}

.nav {
  display: flex;
  align-items: center;
  height: 72px;
  gap: 24px;
  position: relative;
}

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

.logo-mark {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #F0FDFA;
  border: 1px solid #CCFBF1;
  border-radius: 10px;
}

.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--nav-text);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 8px;
}

.nav-links a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--nav-sub);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-links a:hover {
  color: var(--nav-text);
  background: #F1F5F9;
}

.nav-links a.active {
  color: #0D9488;
  background: #F0FDFA;
  font-weight: 600;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 220px;
  height: 40px;
  padding: 0 14px;
  background: #F8FAFC;
  border: 1px solid var(--nav-border);
  border-radius: var(--radius-full);
  transition: var(--transition);
}

.search-box:focus-within {
  border-color: var(--accent);
  background: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(20,184,166,0.15);
}

.search-box svg {
  width: 16px;
  height: 16px;
  color: #94A3B8;
  flex-shrink: 0;
}

.search-box input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 14px;
  color: var(--nav-text);
  width: 100%;
}

.search-box input::placeholder {
  color: #94A3B8;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  border: 1px solid transparent;
  text-decoration: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #14B8A6, #0D9488);
  color: #FFFFFF;
  box-shadow: 0 4px 18px rgba(20,184,166,0.28);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(20,184,166,0.40);
}

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

.btn-sm {
  padding: 9px 20px;
  font-size: 14px;
  border-radius: var(--radius-full);
}

.btn-ghost {
  background: transparent;
  color: var(--text-main);
  border-color: rgba(255,255,255,0.25);
}

.btn-ghost:hover {
  border-color: rgba(255,255,255,0.50);
  background: rgba(255,255,255,0.06);
}

.btn:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 2px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: #F8FAFC;
  border: 1px solid var(--nav-border);
  border-radius: 10px;
  transition: var(--transition);
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  background: var(--nav-text);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle:hover {
  background: #F1F5F9;
}

/* ===== Category Hero ===== */
.category-hero {
  position: relative;
  padding: 64px 0;
  min-height: 240px;
  display: flex;
  align-items: center;
  background: linear-gradient(180deg, rgba(11,18,32,0.50), rgba(8,14,26,0.92)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  overflow: hidden;
}

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

.h-deco {
  position: absolute;
  right: 10%;
  top: 50%;
  transform: translateY(-50%) rotate(6deg);
  width: 150px;
  height: 150px;
  border: 2px solid rgba(56,189,248,0.10);
  border-radius: 24px;
  pointer-events: none;
  z-index: 1;
}

.h-deco span {
  position: absolute;
  display: block;
  background: rgba(56,189,248,0.12);
}

.h-deco span:nth-child(1) {
  left: 50%;
  top: 18%;
  bottom: 18%;
  width: 2px;
  transform: translateX(-50%);
}

.h-deco span:nth-child(2) {
  top: 50%;
  left: 18%;
  right: 18%;
  height: 2px;
  transform: translateY(-50%);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

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

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

.breadcrumb .divider {
  color: rgba(148,163,184,0.6);
}

.category-hero h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

.category-hero .hero-desc {
  margin-top: 12px;
  font-size: 17px;
  color: #C7D2E0;
  max-width: 560px;
  line-height: 1.7;
}

/* ===== Section common ===== */
.section {
  padding: 96px 0;
  position: relative;
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 52px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-light);
  background: rgba(20,184,166,0.10);
  border: 1px solid rgba(20,184,166,0.22);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  letter-spacing: 0.02em;
}

.section-head h2 {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.3;
  margin-top: 16px;
  color: var(--text-main);
}

.section-head p {
  margin-top: 12px;
  color: var(--text-muted);
  font-size: 16px;
}

/* ===== Split asymmetric layout ===== */
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.split-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: var(--shadow-card);
  position: relative;
}

.split-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(11,18,32,0.35));
  pointer-events: none;
}

.split-media img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.split-media:hover img {
  transform: scale(1.03);
}

.split-content h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-main);
}

.split-content > p {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 16px;
}

/* ===== Check list ===== */
.check-list li {
  display: flex;
  gap: 14px;
  padding: 16px;
  margin-bottom: 12px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
  transition: var(--transition);
}

.check-list li:hover {
  border-color: var(--glass-border-hover);
  background: rgba(255,255,255,0.08);
  transform: translateX(4px);
}

.check-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(20,184,166,0.15);
  border: 1px solid rgba(20,184,166,0.35);
  color: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  margin-top: 2px;
}

.check-list strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
}

.check-list p {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 2px;
  line-height: 1.65;
}

/* ===== Service list ===== */
.service-list li {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px;
  margin-bottom: 14px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(16px);
  transition: var(--transition);
}

.service-list li:hover {
  border-color: rgba(45,212,191,0.35);
  background: rgba(255,255,255,0.08);
}

.service-list li::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px rgba(20,184,166,0.60);
  margin-top: 8px;
  flex-shrink: 0;
}

.service-list strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
}

.service-list span {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: 2px;
}

/* ===== Steps ===== */
.venue-section {
  background: rgba(14,24,48,0.55);
  border-top: 1px solid rgba(255,255,255,0.05);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.step-card {
  position: relative;
  padding: 28px 22px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
  transition: var(--transition);
}

.step-card:hover {
  border-color: rgba(45,212,191,0.35);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.35);
}

.step-num {
  font-family: "DIN Alternate", "Inter", -apple-system, sans-serif;
  font-size: 32px;
  font-weight: 700;
  color: rgba(45,212,191,0.35);
  line-height: 1;
  display: block;
  margin-bottom: 18px;
}

.step-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

.step-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ===== FAQ ===== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  backdrop-filter: blur(16px);
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--glass-border-hover);
}

.faq-item.open {
  border-color: rgba(45,212,191,0.35);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 22px;
  background: none;
  border: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: background 0.2s;
}

.faq-question:hover {
  background: rgba(255,255,255,0.03);
}

.faq-question:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: -2px;
  border-radius: var(--radius-md);
}

.faq-icon {
  position: relative;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  background: rgba(20,184,166,0.12);
  border: 1px solid rgba(20,184,166,0.30);
  transition: transform 0.3s ease;
}

.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--accent-light);
  border-radius: 2px;
}

.faq-icon::before {
  width: 12px;
  height: 2px;
}

.faq-icon::after {
  width: 2px;
  height: 12px;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer p {
  padding: 0 22px 18px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.75;
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0 104px;
}

.cta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 52px 56px;
  background: linear-gradient(135deg, rgba(20,184,166,0.12), rgba(56,189,248,0.06)), rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 20px;
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 180px;
  height: 180px;
  background: radial-gradient(circle, rgba(45,212,191,0.14), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-text {
  position: relative;
  z-index: 1;
}

.cta-text h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  margin-top: 12px;
  color: var(--text-main);
}

.cta-text p {
  margin-top: 10px;
  color: var(--text-muted);
  font-size: 15px;
}

.cta-actions {
  display: flex;
  gap: 14px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-footer);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 64px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-logo .logo-text {
  color: #FFFFFF;
}

.footer-brand p {
  margin-top: 16px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.75;
  max-width: 320px;
}

.footer-col h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 16px;
}

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

.footer-col ul a,
.footer-col ul span {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-col ul a:hover {
  color: var(--accent-light);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom p {
  font-size: 13px;
  color: #64748B;
}

.footer-links {
  display: flex;
  gap: 18px;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #FFFFFF;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 4px;
    box-shadow: 0 16px 32px rgba(15,23,42,0.10);
    border-bottom: 1px solid var(--nav-border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 14px 16px;
    font-size: 16px;
  }

  .search-box {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .steps-grid .step-card:nth-child(4),
  .steps-grid .step-card:nth-child(5) {
    grid-column: span 1;
  }

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

@media (max-width: 900px) {
  .split-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .split-grid.reverse .split-media {
    order: 0;
  }

  .split-grid.reverse .split-content {
    order: 1;
  }

  .split-media img {
    height: 300px;
  }

  .cta-box {
    flex-direction: column;
    text-align: center;
    padding: 40px 28px;
  }

  .cta-actions {
    justify-content: center;
    flex-wrap: wrap;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }

  .section-head h2 {
    font-size: 26px;
  }

  .category-hero {
    padding: 48px 0;
    min-height: 200px;
  }

  .category-hero h1 {
    font-size: 34px;
  }

  .h-deco {
    display: none;
  }

  .steps-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
}

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

  .nav {
    height: 64px;
    gap: 8px;
  }

  .logo-text {
    font-size: 17px;
  }

  .logo-mark {
    width: 34px;
    height: 34px;
  }

  .nav-links {
    top: 64px;
  }

  .btn-sm {
    padding: 8px 16px;
    font-size: 13px;
  }

  .category-hero {
    padding: 40px 0;
  }

  .category-hero h1 {
    font-size: 30px;
  }

  .category-hero .hero-desc {
    font-size: 15px;
  }

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

  .split-media img {
    height: 220px;
  }

  .cta-box {
    padding: 32px 20px;
  }

  .cta-text h2 {
    font-size: 22px;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-bottom: 36px;
  }

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