/* roulang page: index */
:root {
  --bg: #F5F3EF;
  --bg-deep: #0B0F12;
  --surface: #FFFFFF;
  --surface-2: #F0EEE9;
  --primary: #00C8A0;
  --primary-deep: #00A384;
  --accent: #D4A853;
  --text-main: #171B1E;
  --text-sub: #5B6268;
  --text-weak: #9AA1A8;
  --border: #E6E3DC;
  --border-deep: #232B31;
  --danger: #D9534F;
  --success: #00C8A0;
  --radius-s: 4px;
  --radius-m: 10px;
  --radius-l: 18px;
  --radius-xl: 24px;
  --shadow-lift: 0 12px 28px rgba(11,15,18,.08);
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: "Inter", "JetBrains Mono", monospace;
  --container: 1200px;
  --space-section: 100px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  background: var(--bg);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: none; }
:focus-visible { outline: 3px solid rgba(0,200,160,.35); outline-offset: 2px; border-radius: var(--radius-s); }

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11,15,18,0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav-bar {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0,200,160,.3);
}
.logo-icon svg { width: 20px; height: 20px; }
.logo-text { color: #fff; font-weight: 700; font-size: 1.15rem; letter-spacing: 0.02em; }
.nav-search {
  flex: 1;
  max-width: 480px;
  margin: 0 auto;
  position: relative;
}
.nav-search svg {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  stroke: var(--text-sub);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  pointer-events: none;
}
.nav-search input {
  width: 100%;
  height: 44px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: #fff;
  padding: 0 18px 0 44px;
  font-size: 0.9rem;
  color: var(--text-main);
  transition: border-color .18s ease, box-shadow .18s ease;
}
.nav-search input::placeholder { color: var(--text-weak); }
.nav-search input:hover { box-shadow: 0 2px 8px rgba(0,0,0,.06); }
.nav-search input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0,200,160,.25); }
.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.nav-menu a {
  position: relative;
  color: rgba(255,255,255,0.8);
  font-size: 0.9rem;
  padding: 8px 12px;
  transition: color .18s ease;
  white-space: nowrap;
}
.nav-menu a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .18s ease;
}
.nav-menu a:hover,
.nav-menu a.active { color: var(--primary); }
.nav-menu a.active::after,
.nav-menu a:hover::after { transform: scaleX(1); }
.nav-cta { margin-left: 8px; flex-shrink: 0; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 14px 28px;
  border-radius: var(--radius-s);
  transition: all .18s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #06251E; }
.btn-primary:hover { background: var(--primary-deep); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,200,160,.25); }
.btn-primary:active { transform: scale(.97); }
.btn-secondary { background: transparent; border-color: var(--border); color: var(--text-main); }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }
.btn-ghost-light { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.35); color: #fff; }
.btn-ghost-light:hover { background: rgba(255,255,255,0.16); border-color: #fff; color: #fff; transform: translateY(-2px); }
.btn-sm { padding: 10px 20px; font-size: 0.85rem; }
.btn-block { display: flex; width: 100%; }

/* Mobile nav */
.nav-toggle { display: none; flex-shrink: 0; width: 40px; height: 40px; border-radius: var(--radius-s); border: 1px solid rgba(255,255,255,0.2); position: relative; }
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: #fff;
  position: absolute;
  left: 10px;
  transition: all .2s ease;
}
.nav-toggle span:nth-child(1) { top: 13px; }
.nav-toggle span:nth-child(2) { top: 19px; }
.nav-toggle span:nth-child(3) { top: 25px; }
.nav-toggle.open span:nth-child(1) { top: 19px; transform: rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { top: 19px; transform: rotate(-45deg); }
.mobile-nav {
  display: none;
  padding: 12px 24px 20px;
  background: var(--bg-deep);
  border-top: 1px solid rgba(255,255,255,0.06);
}
.mobile-nav a {
  display: block;
  padding: 14px 0;
  color: rgba(255,255,255,0.8);
  font-size: 1rem;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.mobile-nav a:last-child { border-bottom: none; }
.mobile-nav a:hover,
.mobile-nav a.active { color: var(--primary); }
.mobile-nav .btn { width: 100%; margin-top: 16px; }

/* Hero */
.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  background: var(--bg-deep);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  animation: heroZoom 10s ease-in-out infinite alternate;
}
@keyframes heroZoom {
  from { transform: scale(1); }
  to { transform: scale(1.05); }
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11,15,18,0.94) 0%, rgba(11,15,18,0.65) 55%, rgba(11,15,18,0.25) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  padding: 80px 0;
}
.kicker {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(0,200,160,0.12);
  border: 1px solid rgba(0,200,160,0.25);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.15;
  color: #fff;
  max-width: 760px;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}
.hero-sub {
  font-size: 1.2rem;
  color: rgba(255,255,255,0.8);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.6;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-countdown {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: rgba(11,15,18,0.5);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-l);
  padding: 20px 28px;
}
.count-item { text-align: center; }
.count-item .num {
  font-family: var(--font-num);
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  display: block;
  line-height: 1.2;
  min-width: 2ch;
}
.count-item .label { font-size: 0.7rem; color: var(--text-weak); margin-top: 4px; display: block; }
.count-sep { font-family: var(--font-num); font-size: 1.6rem; color: var(--primary); font-weight: 300; }
.scroll-indicator {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  width: 30px;
  height: 48px;
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 999px;
  z-index: 2;
}
.scroll-indicator::after {
  content: "";
  position: absolute;
  top: 8px;
  left: 50%;
  width: 4px;
  height: 8px;
  margin-left: -2px;
  border-radius: 4px;
  background: var(--primary);
  animation: scrollPulse 1.8s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(12px); opacity: .4; }
}

/* Stats bar */
.stats-bar { background: var(--surface-2); border-bottom: 1px solid var(--border); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 48px 0;
}
.stat-item { text-align: center; padding: 12px 0; }
.stat-num {
  font-family: var(--font-num);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}
.stat-num .unit { font-size: 1rem; color: var(--text-sub); font-weight: 500; margin-left: 2px; }
.stat-label { font-size: 0.8rem; color: var(--text-sub); margin-top: 6px; }

/* Section base */
.section { padding: var(--space-section) 0; }
.section-head { margin-bottom: 48px; }
.section-head .line {
  width: 28px;
  height: 3px;
  background: var(--primary);
  border-radius: 3px;
  margin-bottom: 16px;
}
.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-main);
}
.section-head p { color: var(--text-sub); font-size: 0.95rem; max-width: 640px; margin-top: 12px; }

/* Timeline */
.timeline-section { background: var(--bg); }
.timeline { position: relative; max-width: 900px; margin: 0 auto; padding: 20px 0; }
.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
  transform: translateX(-50%);
}
.timeline-item {
  position: relative;
  width: 50%;
  padding: 0 40px 48px;
}
.timeline-item:nth-child(odd) { left: 0; text-align: right; }
.timeline-item:nth-child(even) { left: 50%; text-align: left; }
.timeline-node {
  position: absolute;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgba(212,168,83,0.25);
  transition: all .25s ease;
  z-index: 2;
}
.timeline-item:nth-child(odd) .timeline-node { right: -6px; }
.timeline-item:nth-child(even) .timeline-node { left: -6px; }
.timeline-item:hover .timeline-node { transform: scale(1.35); box-shadow: 0 0 0 8px rgba(212,168,83,0.2); }
.timeline-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  padding: 24px;
  transition: border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}
.timeline-card:hover { border-color: var(--primary); box-shadow: var(--shadow-lift); transform: translateY(-3px); }
.timeline-time {
  font-family: var(--font-num);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}
.timeline-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; color: var(--text-main); }
.timeline-card p { font-size: 0.88rem; color: var(--text-sub); line-height: 1.65; }

/* Speakers */
.speakers-section { background: var(--surface-2); }
.speakers-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.speaker-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-l);
  overflow: hidden;
  transition: box-shadow .2s ease, transform .2s ease;
}
.speaker-card:hover { box-shadow: var(--shadow-lift); transform: translateY(-3px); }
.speaker-media {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  background: #1a1f24;
}
.speaker-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s ease; }
.speaker-card:hover .speaker-media img { transform: scale(1.03); }
.speaker-media::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 20%;
  background: linear-gradient(to top, rgba(11,15,18,0.4), transparent);
}
.speaker-info { padding: 24px; }
.speaker-info h3 { font-size: 1.1rem; font-weight: 600; color: var(--text-main); }
.speaker-role { font-size: 0.8rem; color: var(--primary); font-weight: 500; margin-bottom: 8px; display: block; letter-spacing: 0.05em; }
.speaker-info p { font-size: 0.88rem; color: var(--text-sub); line-height: 1.65; }

/* Pricing */
.pricing-section { background: var(--bg); }
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  align-items: stretch;
}
.pricing-col {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: box-shadow .2s ease, transform .2s ease;
}
.pricing-col:hover { box-shadow: var(--shadow-lift); transform: translateY(-4px); }
.pricing-col.featured { border: 2px solid var(--primary); }
.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #0B0F12;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  white-space: nowrap;
  letter-spacing: 0.03em;
}
.pricing-type { font-size: 1.1rem; font-weight: 600; margin-bottom: 16px; color: var(--text-main); }
.pricing-price { margin-bottom: 24px; display: flex; align-items: baseline; gap: 4px; }
.pricing-price .symbol { font-family: var(--font-num); font-size: 1.2rem; font-weight: 600; color: var(--text-main); }
.pricing-price .amount { font-family: var(--font-num); font-size: 2rem; font-weight: 700; color: var(--text-main); line-height: 1; }
.pricing-price .unit { font-size: 0.8rem; color: var(--text-sub); }
.pricing-features { flex: 1; margin-bottom: 28px; }
.pricing-features li {
  position: relative;
  padding: 8px 0 8px 14px;
  font-size: 0.9rem;
  color: var(--text-main);
  border-bottom: 1px solid var(--border);
}
.pricing-features li:last-child { border-bottom: none; }
.pricing-features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 2px;
  height: 14px;
  background: var(--primary);
  border-radius: 2px;
}
.pricing-col .btn { width: 100%; }

/* Register CTA */
.register-section { background: var(--bg-deep); position: relative; overflow: hidden; }
.register-section::before {
  content: "";
  position: absolute;
  top: 0; right: 0;
  width: 400px;
  height: 400px;
  background-image: url('/assets/images/backpic/back-3.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.15;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
}
.register-section .section-head h2 { color: #fff; }
.register-section .section-head p { color: rgba(255,255,255,0.7); }
.register-panel {
  max-width: 720px;
  margin: 0 auto;
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: 40px;
  position: relative;
  z-index: 2;
}
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.form-group { display: flex; flex-direction: column; }
.form-group.full { grid-column: 1 / -1; }
.form-group label { font-size: 0.85rem; font-weight: 500; margin-bottom: 6px; color: var(--text-main); }
.form-group input,
.form-group select {
  height: 46px;
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  padding: 0 14px;
  font-size: 0.92rem;
  background: var(--surface);
  transition: border-color .18s ease, box-shadow .18s ease;
  width: 100%;
}
.form-group select {
  appearance: none;
  -webkit-appearance: none;
  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='%235B6268' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,200,160,0.15);
}
.form-group input.error,
.form-group select.error { border-color: var(--danger); }
.form-error { font-size: 0.8rem; color: var(--danger); margin-top: 4px; display: none; }
.form-group.has-error .form-error { display: block; }
.form-group.has-error input,
.form-group.has-error select { border-color: var(--danger); }
.form-group input.success,
.form-group select.success { border-color: var(--success); }
.form-privacy { font-size: 0.75rem; color: var(--text-weak); text-align: center; margin-top: 14px; }
.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}
.form-success .icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(0,200,160,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.form-success .icon svg { width: 28px; height: 28px; stroke: var(--primary); }
.form-success h3 { font-size: 1.3rem; font-weight: 600; margin-bottom: 8px; }
.form-success p { font-size: 0.9rem; color: var(--text-sub); }

/* CMS News */
.news-section { background: var(--bg); }
.news-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 16px;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--border);
  transition: all .18s ease;
  padding-bottom: 2px;
}
.text-link:hover { color: var(--primary); border-bottom-color: var(--primary); }
.text-link .arrow { transition: transform .18s ease; }
.text-link:hover .arrow { transform: translateX(4px); }
.news-list .news-item {
  display: grid;
  grid-template-columns: 130px 1fr auto;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  align-items: flex-start;
  transition: padding-left .2s ease;
}
.news-list .news-item:first-child { border-top: 1px solid var(--border); }
.news-list .news-item:hover { padding-left: 8px; }
.news-date { font-family: var(--font-num); font-size: 0.85rem; color: var(--text-sub); padding-top: 4px; }
.news-title { font-size: 1.05rem; font-weight: 600; color: var(--text-main); transition: color .18s ease; margin-bottom: 6px; }
.news-list .news-item:hover .news-title { color: var(--primary); }
.news-excerpt { font-size: 0.88rem; color: var(--text-sub); line-height: 1.6; }
.news-meta { display: flex; flex-direction: column; gap: 8px; align-items: flex-end; }
.news-cat {
  background: var(--surface-2);
  border-radius: var(--radius-s);
  padding: 3px 10px;
  font-size: 0.72rem;
  color: var(--text-sub);
  white-space: nowrap;
}
.news-read { font-size: 0.85rem; color: var(--primary); font-weight: 500; }
.news-empty {
  text-align: center;
  padding: 48px 0;
  color: var(--text-weak);
  font-size: 0.92rem;
}
.news-empty .icon { width: 48px; height: 48px; margin: 0 auto 12px; opacity: 0.5; }

/* FAQ */
.faq-section { background: var(--surface-2); }
.faq-grid { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-m);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .18s ease;
}
.faq-item:hover { border-color: rgba(0,200,160,0.4); }
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  font-size: 0.98rem;
  font-weight: 500;
  cursor: pointer;
  color: var(--text-main);
}
.faq-q .icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--text-sub);
  transition: all .2s ease;
  flex-shrink: 0;
}
.faq-item.open .faq-q .icon { transform: rotate(45deg); background: var(--primary); color: #06251E; }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-a p { padding: 0 24px 20px; font-size: 0.9rem; color: var(--text-sub); line-height: 1.7; }

/* Footer */
.site-footer { background: var(--bg-deep); border-top: 1px solid var(--border-deep); padding: 64px 0 32px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand .logo-text { font-size: 1.2rem; }
.footer-desc { font-size: 0.88rem; color: var(--text-sub); line-height: 1.65; margin-bottom: 16px; max-width: 300px; }
.footer-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.footer-tags span {
  font-size: 0.75rem;
  color: var(--text-sub);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 4px 12px;
  border-radius: 999px;
}
.footer-col h4 {
  font-size: 0.8rem;
  color: #fff;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 600;
  margin-bottom: 20px;
}
.footer-col ul li { margin-bottom: 12px; }
.footer-col ul a { font-size: 0.88rem; color: var(--text-sub); transition: color .18s ease; }
.footer-col ul a:hover { color: var(--primary); }
.footer-contact p { font-size: 0.88rem; color: var(--text-sub); margin-bottom: 10px; display: flex; gap: 8px; align-items: center; }
.footer-contact svg { width: 16px; height: 16px; stroke: var(--text-sub); flex-shrink: 0; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-weak);
}

/* Animations */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.reveal { opacity: 0; animation: fadeUp .6s ease forwards; }

/* Responsive */
@media (max-width: 1024px) {
  :root { --space-section: 80px; }
  .nav-menu { display: none; }
  .nav-toggle { display: block; }
  .nav-cta { display: none; }
  .nav-search { max-width: 320px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .nav-bar { height: 64px; gap: 12px; }
  .logo-text { font-size: 1rem; }
  .mobile-nav { display: block; }
  .nav-search { max-width: none; order: 3; margin: 0; padding: 0 24px 16px; }
  .mobile-nav .btn { display: flex; }
  .hero { min-height: auto; padding: 100px 0 80px; }
  .hero-countdown { flex-wrap: wrap; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .timeline::before { left: 8px; transform: none; }
  .timeline-item,
  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) { width: 100%; left: 0; text-align: left; padding: 0 0 40px 36px; }
  .timeline-item:nth-child(odd) .timeline-node,
  .timeline-item:nth-child(even) .timeline-node { left: 2px; right: auto; }
  .speakers-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .register-panel { padding: 28px; }
  .pricing-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .news-list .news-item { grid-template-columns: 1fr; gap: 8px; }
  .news-meta { flex-direction: row; align-items: center; }
  .scroll-indicator { display: none; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .nav-bar { flex-wrap: wrap; padding: 0 16px; }
  .mobile-nav { padding-left: 16px; padding-right: 16px; }
  .hero-content { padding: 60px 0; }
  .hero-actions .btn { width: 100%; }
  .stats-grid { padding: 32px 0; }
  .section { padding: 48px 0; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; }
}

/* roulang page: article */
:root{
  --bg:#F5F3EF;
  --bg-deep:#0B0F12;
  --surface:#FFFFFF;
  --surface-2:#F0EEE9;
  --primary:#00C8A0;
  --primary-deep:#00A384;
  --accent:#D4A853;
  --text-main:#171B1E;
  --text-sub:#5B6268;
  --text-weak:#9AA1A8;
  --border:#E6E3DC;
  --border-deep:#232B31;
  --radius-s:4px;
  --radius-m:10px;
  --radius-l:18px;
  --radius-xl:24px;
  --shadow-lift:0 12px 28px rgba(11,15,18,.08);
  --font-main:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-num:"Inter","JetBrains Mono",monospace;
  --transition:180ms ease;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font-main);background:var(--bg);color:var(--text-main);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font-family:inherit;font-size:inherit;border:0;background:none;color:inherit}
ul,ol{list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding-left:24px;padding-right:24px}
.container.narrow{max-width:820px}

/* Header & Nav */
.site-header{position:sticky;top:0;z-index:100;background:rgba(11,15,18,.72);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid rgba(255,255,255,.06)}
.header-inner{display:flex;align-items:center;gap:24px;min-height:76px;padding-top:12px;padding-bottom:12px;flex-wrap:wrap}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{width:38px;height:38px;border-radius:50%;background:rgba(0,200,160,.12);display:flex;align-items:center;justify-content:center;border:1px solid rgba(0,200,160,.3)}
.logo-icon svg{width:22px;height:22px}
.logo-text{font-size:1.2rem;font-weight:700;color:#fff;letter-spacing:.02em;white-space:nowrap}
.search-wrap{position:relative;flex:1;max-width:480px;margin:0 auto}
.search-wrap svg{position:absolute;left:16px;top:50%;transform:translateY(-50%);width:18px;height:18px;stroke:var(--text-sub);pointer-events:none}
.search-wrap input{width:100%;height:44px;border-radius:999px;background:#fff;padding:0 20px 0 46px;font-size:.92rem;color:var(--text-main);transition:box-shadow var(--transition),border-color var(--transition);border:2px solid transparent;outline:none}
.search-wrap input::placeholder{color:var(--text-weak)}
.search-wrap input:hover{box-shadow:0 2px 10px rgba(0,0,0,.08)}
.search-wrap input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(0,200,160,.18);outline:none}
.nav-menu{display:flex;align-items:center;gap:26px}
.nav-menu a{color:rgba(255,255,255,.85);font-size:.92rem;font-weight:500;position:relative;padding:6px 2px;transition:color var(--transition)}
.nav-menu a::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform var(--transition)}
.nav-menu a:hover{color:var(--primary)}
.nav-menu a.active{color:var(--primary)}
.nav-menu a.active::after{transform:scaleX(1)}
.header-cta{margin-left:10px}
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--primary);color:#06251E;font-weight:600;font-size:.94rem;padding:12px 24px;border-radius:var(--radius-s);transition:background var(--transition),transform var(--transition),box-shadow var(--transition);cursor:pointer;border:0;text-decoration:none;white-space:nowrap}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,200,160,.25)}
.btn-primary:active{transform:scale(.97)}
.btn-primary:focus-visible{outline:3px solid rgba(0,200,160,.35);outline-offset:2px}
.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:transparent;border:1px solid var(--border);color:var(--text-main);font-weight:500;font-size:.94rem;padding:11px 22px;border-radius:var(--radius-s);transition:border-color var(--transition),color var(--transition),transform var(--transition);cursor:pointer;text-decoration:none}
.btn-secondary:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-secondary:active{transform:scale(.97)}
.btn-secondary:focus-visible{outline:3px solid rgba(0,200,160,.25);outline-offset:2px}
.header-cta{padding:10px 20px;font-size:.88rem}
.nav-toggle{display:none;width:42px;height:42px;border-radius:var(--radius-m);background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);align-items:center;justify-content:center;cursor:pointer;transition:background var(--transition)}
.nav-toggle:hover{background:rgba(255,255,255,.12)}
.nav-toggle span{display:block;width:18px;height:2px;background:#fff;margin:4px auto;transition:transform var(--transition),opacity var(--transition);border-radius:2px}

/* Article Hero */
.article-hero{position:relative;background:linear-gradient(90deg,rgba(11,15,18,.94) 0%,rgba(11,15,18,.78) 55%,rgba(11,15,18,.45) 100%),url('/assets/images/backpic/back-2.webp') center/cover no-repeat;padding:110px 0 90px;color:#fff}
.article-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:.85rem;color:rgba(255,255,255,.6);margin-bottom:28px;flex-wrap:wrap}
.breadcrumb a{color:rgba(255,255,255,.75);transition:color var(--transition)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .current{color:rgba(255,255,255,.5);max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-hero-meta{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-bottom:20px}
.badge{display:inline-flex;align-items:center;background:rgba(0,200,160,.15);color:var(--primary);font-size:.78rem;font-weight:600;padding:5px 14px;border-radius:999px;border:1px solid rgba(0,200,160,.3);letter-spacing:.04em}
.meta-item{display:inline-flex;align-items:center;gap:7px;font-size:.86rem;color:rgba(255,255,255,.65)}
.meta-item svg{width:15px;height:15px;stroke:rgba(255,255,255,.5)}
.article-hero h1{font-size:clamp(1.9rem,4vw,3.1rem);font-weight:800;line-height:1.2;letter-spacing:-.01em;max-width:860px}

/* Article Body */
.article-body{padding:80px 0 40px}
.article-layout{display:grid;grid-template-columns:1fr;gap:60px}
.article-main{min-width:0}
.article-content{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);padding:52px 56px;margin-bottom:32px}
.article-content h2{font-size:1.5rem;font-weight:700;margin:40px 0 16px;line-height:1.35;padding-top:20px;border-top:1px solid var(--border)}
.article-content h2:first-child{margin-top:0;padding-top:0;border-top:0}
.article-content h3{font-size:1.2rem;font-weight:600;margin:28px 0 12px;line-height:1.4}
.article-content h4{font-size:1.05rem;font-weight:600;margin:22px 0 10px;line-height:1.4}
.article-content p{margin:0 0 1.5em;color:var(--text-main);font-size:1rem;line-height:1.8}
.article-content a{color:var(--primary-deep);text-decoration:underline;text-underline-offset:3px}
.article-content blockquote{border-left:3px solid var(--primary);background:var(--surface-2);padding:18px 24px;margin:24px 0;border-radius:0 var(--radius-m) var(--radius-m) 0;color:var(--text-sub);font-style:normal}
.article-content blockquote p{margin-bottom:.6em}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content ul,.article-content ol{padding-left:24px;margin:0 0 1.5em}
.article-content ul li{position:relative;padding:6px 0;color:var(--text-main)}
.article-content ul li::before{content:"";position:absolute;left:-18px;top:17px;width:8px;height:8px;border-radius:2px;background:var(--primary);opacity:.8}
.article-content ol{list-style:decimal}
.article-content ol li{padding:6px 0;color:var(--text-main)}
.article-content img{border-radius:var(--radius-l);margin:28px 0}
.article-content pre{background:var(--bg-deep);color:#d6e2e9;padding:22px 26px;border-radius:var(--radius-l);overflow-x:auto;margin:24px 0;font-family:"JetBrains Mono",var(--font-num);font-size:.9rem;line-height:1.7}
.article-content code{background:var(--surface-2);padding:3px 8px;border-radius:var(--radius-s);font-family:"JetBrains Mono",var(--font-num);font-size:.88em;color:var(--primary-deep)}
.article-content pre code{background:transparent;padding:0;color:inherit}
.article-content table{width:100%;border-collapse:collapse;margin:24px 0;font-size:.92rem}
.article-content th{background:var(--surface-2);padding:12px 14px;text-align:left;font-weight:600;border:1px solid var(--border)}
.article-content td{padding:12px 14px;border:1px solid var(--border)}
.article-tags{display:flex;align-items:center;gap:12px;flex-wrap:wrap;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-l);padding:20px 24px;margin-top:32px}
.tag{display:inline-flex;background:var(--surface-2);color:var(--text-sub);font-size:.8rem;padding:6px 14px;border-radius:var(--radius-s);font-weight:500;transition:background var(--transition),color var(--transition);cursor:pointer}
.tag:hover{background:rgba(0,200,160,.14);color:var(--primary-deep)}
.share-row{margin-left:auto;display:flex;align-items:center;gap:10px}
.share-row span{font-size:.8rem;color:var(--text-weak)}
.share-icon{width:34px;height:34px;border-radius:50%;background:var(--surface-2);display:inline-flex;align-items:center;justify-content:center;transition:background var(--transition),transform var(--transition)}
.share-icon:hover{background:rgba(0,200,160,.15);transform:translateY(-2px)}
.share-icon svg{width:15px;height:15px;stroke:var(--text-sub)}

/* Article Empty */
.article-empty{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);padding:80px 40px;text-align:center}
.article-empty svg{width:52px;height:52px;stroke:var(--text-weak);margin:0 auto 20px}
.article-empty h2{font-size:1.4rem;font-weight:700;margin-bottom:10px}
.article-empty p{color:var(--text-sub);margin-bottom:28px}

/* Related */
.related-section{padding:60px 0 80px}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:36px}
.kicker{font-size:.78rem;font-weight:600;letter-spacing:.14em;color:var(--primary);text-transform:uppercase;margin-bottom:10px}
.section-head h2{font-size:clamp(1.6rem,3vw,2.2rem);font-weight:700;line-height:1.2}
.section-head h2::before{content:"";display:block;width:28px;height:3px;background:var(--primary);border-radius:2px;margin-bottom:12px}
.related-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.related-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-xl);overflow:hidden;transition:transform var(--transition),box-shadow var(--transition),border-color var(--transition)}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);border-color:var(--primary)}
.related-card .card-media{position:relative;overflow:hidden;aspect-ratio:16/9;background:var(--bg-deep)}
.related-card .card-media img{width:100%;height:100%;object-fit:cover;transition:transform 300ms ease}
.related-card:hover .card-media img{transform:scale(1.03)}
.related-card .card-body{padding:22px 24px 24px}
.related-card .card-body h3{font-size:1.08rem;font-weight:600;line-height:1.4;margin-bottom:10px;transition:color var(--transition)}
.related-card .card-body h3:hover{color:var(--primary-deep)}
.related-card .card-body p{font-size:.9rem;color:var(--text-sub);margin-bottom:16px;line-height:1.6}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--primary-deep);font-size:.9rem;font-weight:600;text-decoration:none;transition:gap var(--transition),color var(--transition)}
.text-link:hover{color:var(--primary);gap:12px}
.text-link svg{width:16px;height:16px;stroke:currentColor}
.back-link-wrap{margin-top:40px;text-align:center}

/* CTA */
.article-cta{background:var(--bg-deep);padding:80px 0;position:relative;overflow:hidden}
.article-cta::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(0,200,160,.12) 0%,transparent 60%)}
.article-cta .container{position:relative;z-index:2;text-align:center}
.article-cta h2{color:#fff;font-size:clamp(1.6rem,3vw,2.2rem);font-weight:700;margin-bottom:14px}
.article-cta p{color:rgba(255,255,255,.65);max-width:520px;margin:0 auto 32px;font-size:.96rem}
.article-cta .btn-primary{padding:15px 36px}
.article-cta .btn-primary svg{width:17px;height:17px}

/* Footer */
.site-footer{background:var(--bg-deep);border-top:1px solid var(--border-deep);padding:72px 0 34px;color:rgba(255,255,255,.75)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1.4fr;gap:48px;margin-bottom:48px}
.footer-brand .logo .logo-text{font-size:1.3rem}
.footer-desc{font-size:.9rem;color:rgba(255,255,255,.55);line-height:1.7;margin:18px 0;max-width:340px}
.footer-tags{display:flex;flex-wrap:wrap;gap:8px}
.footer-tags span{display:inline-flex;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);color:rgba(255,255,255,.5);font-size:.75rem;padding:4px 12px;border-radius:999px}
.footer-col h4{font-size:.8rem;color:#fff;font-weight:600;letter-spacing:.12em;margin-bottom:18px;text-transform:uppercase}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col ul a{font-size:.9rem;color:rgba(255,255,255,.55);transition:color var(--transition)}
.footer-col ul a:hover{color:var(--primary)}
.footer-contact p{display:flex;align-items:flex-start;gap:10px;font-size:.88rem;color:rgba(255,255,255,.55);margin-bottom:12px;line-height:1.6}
.footer-contact svg{width:17px;height:17px;flex-shrink:0;stroke:rgba(255,255,255,.4);margin-top:3px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.06);padding-top:24px;text-align:center;font-size:.8rem;color:rgba(255,255,255,.35)}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease,transform .5s ease}
.reveal.visible{opacity:1;transform:translateY(0)}
@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none}
}

/* Responsive */
@media (max-width:1024px){
  .header-inner{gap:16px}
  .search-wrap{max-width:320px}
  .nav-menu{gap:16px}
  .article-content{padding:40px 32px}
}
@media (max-width:768px){
  .header-inner{min-height:64px;padding-top:14px;padding-bottom:14px}
  .search-wrap{flex-basis:100%;max-width:100%;order:3}
  .nav-menu{display:flex;position:fixed;top:0;right:-280px;width:280px;height:100vh;background:var(--bg-deep);flex-direction:column;justify-content:flex-start;padding:100px 30px;gap:22px;transition:right 260ms ease;z-index:98;border-left:1px solid rgba(255,255,255,.06)}
  .nav-menu.open{right:0}
  .nav-menu a{font-size:1rem;color:rgba(255,255,255,.85)}
  .nav-toggle{display:flex;margin-left:auto;z-index:99}
  .header-cta{display:none}
  .article-hero{padding:80px 0 60px}
  .article-body{padding:50px 0 30px}
  .article-content{padding:32px 22px;border-radius:var(--radius-l)}
  .article-content h2{font-size:1.3rem}
  .article-content h3{font-size:1.1rem}
  .related-grid{grid-template-columns:1fr}
  .section-head{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .share-row{margin-left:0;margin-top:12px}
  .article-tags{flex-direction:column;align-items:flex-start;gap:10px}
}
@media (max-width:520px){
  .container{padding-left:18px;padding-right:18px}
  .logo-text{font-size:1.05rem}
  .footer-grid{grid-template-columns:1fr}
  .article-hero h1{font-size:1.65rem}
  .article-hero-meta{gap:10px}
  .related-card .card-body{padding:18px 18px 20px}
  .article-cta{padding:60px 0}
}

/* roulang page: category1 */
:root {
  --bg: #F5F3EF;
  --bg-deep: #0B0F12;
  --surface: #FFFFFF;
  --surface-2: #F0EEE9;
  --primary: #00C8A0;
  --primary-deep: #00A384;
  --accent: #D4A853;
  --text-main: #171B1E;
  --text-sub: #5B6268;
  --text-weak: #9AA1A8;
  --border: #E6E3DC;
  --border-deep: #232B31;
  --danger: #D9534F;
  --success: #00C8A0;
  --radius-s: 4px;
  --radius-m: 10px;
  --radius-l: 18px;
  --radius-xl: 24px;
  --shadow-lift: 0 12px 28px rgba(11, 15, 18, 0.08);
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-num: "Inter", "JetBrains Mono", monospace;
  --transition: 180ms ease;
}
*, *::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-main); line-height: 1.75; font-size: 16px; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; background: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 28px; border-radius: var(--radius-s); font-weight: 600; font-size: 0.95rem; line-height: 1.2; cursor: pointer; transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition), color var(--transition); }
.btn:focus-visible { outline: 3px solid rgba(0, 200, 160, 0.25); outline-offset: 2px; }
.btn-primary { background: var(--primary); color: #06251E; }
.btn-primary:hover { background: var(--primary-deep); transform: translateY(-2px); box-shadow: var(--shadow-lift); }
.btn-primary:active { transform: scale(0.97); }
.btn-secondary { background: transparent; border: 1px solid var(--border); color: var(--text-main); }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.btn-secondary:active { transform: scale(0.97); }
.btn-light { border-color: rgba(255, 255, 255, 0.6); color: #fff; }
.btn-light:hover { border-color: #fff; color: #fff; background: rgba(255, 255, 255, 0.06); }
.btn-sm { padding: 10px 20px; font-size: 0.88rem; }
.text-link { display: inline-flex; align-items: center; gap: 6px; color: var(--text-main); font-weight: 500; font-size: 0.92rem; transition: color var(--transition); }
.text-link:hover { color: var(--primary); }
.text-link:hover::after { transform: translateX(4px); }
.text-link::after { content: "→"; transition: transform var(--transition); }
.text-link:focus-visible { outline: 2px solid var(--primary); outline-offset: 4px; border-radius: var(--radius-s); }
.section { padding: 96px 0; }
.section-alt { background: var(--surface-2); }
.section-head { margin-bottom: 52px; }
.section-kicker { display: inline-block; font-size: 0.78rem; font-weight: 500; letter-spacing: 0.14em; color: var(--primary); text-transform: uppercase; margin-bottom: 10px; }
.section-title { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; line-height: 1.2; position: relative; padding-left: 28px; }
.section-title::before { content: ""; position: absolute; left: 0; top: 8px; width: 28px; height: 3px; background: var(--primary); border-radius: 2px; }
.section-desc { color: var(--text-sub); max-width: 640px; margin-top: 14px; font-size: 0.95rem; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(11, 15, 18, 0.72); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); border-bottom: 1px solid rgba(255, 255, 255, 0.06); }
.header-inner { display: flex; align-items: center; gap: 24px; min-height: 76px; }
.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon { display: inline-flex; width: 36px; height: 36px; border-radius: 50%; border: 1px solid rgba(0, 200, 160, 0.4); align-items: center; justify-content: center; background: rgba(0, 200, 160, 0.08); }
.logo-icon svg { width: 20px; height: 20px; }
.logo-text { font-size: 1.2rem; font-weight: 700; color: #fff; letter-spacing: 0.02em; }
.logo:hover .logo-text { color: var(--primary); }
.header-search { flex: 0 1 480px; display: flex; align-items: center; height: 44px; background: #fff; border-radius: 999px; padding: 0 8px 0 16px; gap: 8px; border: 1px solid transparent; transition: border-color var(--transition), box-shadow var(--transition); margin-left: auto; }
.header-search svg { width: 18px; height: 18px; stroke: var(--text-sub); flex-shrink: 0; }
.header-search input { flex: 1; border: none; background: none; color: var(--text-main); font-size: 0.9rem; }
.header-search input::placeholder { color: var(--text-weak); }
.header-search button { width: 34px; height: 34px; border-radius: 50%; background: var(--primary); color: #06251E; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; transition: background var(--transition), transform var(--transition); flex-shrink: 0; }
.header-search button svg { width: 16px; height: 16px; stroke: #06251E; }
.header-search button:hover { background: var(--primary-deep); transform: scale(1.04); }
.header-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(0, 200, 160, 0.15); }
.nav-menu { display: flex; align-items: center; gap: 28px; margin-left: 8px; }
.nav-menu a { position: relative; color: rgba(255, 255, 255, 0.85); font-size: 0.92rem; font-weight: 500; padding: 6px 2px; transition: color var(--transition); }
.nav-menu a::after { content: ""; position: absolute; left: 0; bottom: -2px; width: 0; height: 2px; background: var(--primary); border-radius: 2px; transition: width var(--transition); }
.nav-menu a:hover { color: var(--primary); }
.nav-menu a:hover::after { width: 100%; }
.nav-menu a.active { color: var(--primary); }
.nav-menu a.active::after { width: 100%; }
.nav-menu a:focus-visible { outline: 2px solid var(--primary); outline-offset: 6px; border-radius: var(--radius-s); }
.header-cta { margin-left: 4px; flex-shrink: 0; }
.mobile-toggle { display: none; width: 42px; height: 42px; border-radius: var(--radius-m); border: 1px solid rgba(255, 255, 255, 0.2); flex-direction: column; align-items: center; justify-content: center; gap: 5px; cursor: pointer; transition: border-color var(--transition); }
.mobile-toggle span { display: block; width: 20px; height: 2px; background: #fff; border-radius: 2px; transition: transform var(--transition), opacity var(--transition), background var(--transition); }
.mobile-toggle:hover { border-color: var(--primary); }
.mobile-toggle:hover span { background: var(--primary); }
.mobile-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-panel { display: none; background: var(--bg-deep); border-top: 1px solid var(--border-deep); padding: 16px 24px 24px; }
.mobile-panel.open { display: block; }
.mobile-nav { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav a { display: block; padding: 12px 8px; color: rgba(255, 255, 255, 0.85); font-size: 1rem; border-radius: var(--radius-m); transition: background var(--transition), color var(--transition); }
.mobile-nav a:hover { background: rgba(255, 255, 255, 0.06); color: var(--primary); }
.mobile-nav a.active { color: var(--primary); }
.mobile-nav .mobile-cta { margin-top: 12px; text-align: center; }
.mobile-cta { padding: 12px !important; text-align: center; }

/* Hero */
.page-hero { position: relative; min-height: 72vh; display: flex; align-items: center; background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat; overflow: hidden; }
.page-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(11, 15, 18, 0.92) 0%, rgba(11, 15, 18, 0.7) 50%, rgba(11, 15, 18, 0.35) 100%); }
.page-hero::after { content: ""; position: absolute; inset: 0; background: rgba(11, 15, 18, 0.25); }
.hero-content { position: relative; z-index: 2; padding: 100px 0; max-width: 760px; }
.hero-kicker { display: inline-block; font-size: 0.78rem; font-weight: 500; letter-spacing: 0.14em; color: var(--primary); text-transform: uppercase; margin-bottom: 16px; padding: 6px 14px; border: 1px solid rgba(0, 200, 160, 0.35); border-radius: 999px; background: rgba(0, 200, 160, 0.1); }
.hero-title { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 800; line-height: 1.1; color: #fff; letter-spacing: -0.01em; margin-bottom: 16px; }
.hero-subtitle { font-size: 1.1rem; color: rgba(255, 255, 255, 0.82); max-width: 520px; margin-bottom: 36px; line-height: 1.7; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.scroll-indicator { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); z-index: 2; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.scroll-indicator .line { width: 1px; height: 44px; background: rgba(255, 255, 255, 0.3); position: relative; overflow: hidden; }
.scroll-indicator .line::after { content: ""; position: absolute; top: -100%; left: 0; width: 100%; height: 100%; background: var(--primary); animation: scrollPulse 2.2s ease infinite; }
.scroll-indicator .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--primary); animation: dotPulse 2.2s ease infinite; }
@keyframes scrollPulse { 0% { top: -100%; } 60% { top: 100%; } 100% { top: 100%; } }
@keyframes dotPulse { 0%, 100% { opacity: 0.4; transform: translateY(0); } 50% { opacity: 1; transform: translateY(8px); } }

/* Stats */
.stats-bar { background: var(--surface-2); border-bottom: 1px solid var(--border); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; padding: 48px 0; }
.stat-item { text-align: center; }
.stat-num { font-family: var(--font-num); font-size: 2rem; font-weight: 800; color: var(--text-main); line-height: 1.2; }
.stat-num span { font-size: 1rem; font-weight: 600; color: var(--primary); margin-left: 2px; }
.stat-label { font-size: 0.8rem; color: var(--text-sub); margin-top: 6px; letter-spacing: 0.04em; }

/* Product grid */
.product-series { background: var(--bg); }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-l); overflow: hidden; display: flex; flex-direction: column; transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); }
.product-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: var(--primary); }
.product-card:hover .product-media img { transform: scale(1.03); }
.product-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: #2a2f34; }
.product-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 600ms ease; }
.product-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 70%, rgba(0, 0, 0, 0.18)); }
.product-badge { position: absolute; top: 14px; left: 14px; z-index: 2; background: var(--accent); color: #1a1509; font-size: 0.72rem; font-weight: 600; padding: 4px 10px; border-radius: 999px; letter-spacing: 0.03em; }
.product-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.product-body h3 { font-size: 1.08rem; font-weight: 600; margin-bottom: 8px; }
.product-body p { font-size: 0.9rem; color: var(--text-sub); line-height: 1.7; margin-bottom: 16px; flex: 1; }
.product-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }
.product-tags span { background: var(--surface-2); border-radius: var(--radius-s); padding: 3px 10px; font-size: 0.76rem; color: var(--text-sub); }
.product-card .text-link { font-size: 0.88rem; }

/* Scenarios */
.scenarios-section { background: var(--bg-deep); }
.scenarios-section .section-title { color: #fff; }
.scenarios-section .section-title::before { background: var(--primary); }
.scenarios-section .section-desc { color: rgba(255, 255, 255, 0.6); }
.scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.scenario-card { background: rgba(255, 255, 255, 0.05); border: 1px solid var(--border-deep); border-radius: var(--radius-l); padding: 28px 24px; transition: border-color var(--transition), transform var(--transition), background var(--transition); }
.scenario-card:hover { border-color: var(--primary); transform: translateY(-3px); background: rgba(255, 255, 255, 0.07); }
.scenario-icon { width: 44px; height: 44px; border-radius: var(--radius-m); background: rgba(0, 200, 160, 0.12); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.scenario-icon svg { width: 22px; height: 22px; stroke: var(--primary); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.scenario-card h3 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.scenario-card p { color: rgba(255, 255, 255, 0.58); font-size: 0.86rem; line-height: 1.65; }

/* Process */
.process-section { background: var(--bg); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; position: relative; }
.process-step { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-l); padding: 28px 24px; position: relative; transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); }
.process-step:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: var(--primary); }
.step-num { font-family: var(--font-num); font-size: 2.2rem; font-weight: 800; color: var(--accent); line-height: 1; display: block; margin-bottom: 16px; }
.process-step h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.process-step p { font-size: 0.86rem; color: var(--text-sub); line-height: 1.7; }
.process-step::before { content: ""; position: absolute; top: 44px; right: -14px; width: 28px; height: 1px; background: var(--border); }
.process-step:last-child::before { display: none; }

/* Advantages */
.adv-section { background: var(--surface-2); }
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.adv-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-l); padding: 28px 24px; transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); }
.adv-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); border-color: var(--accent); }
.adv-icon { width: 42px; height: 42px; border-radius: var(--radius-m); background: rgba(212, 168, 83, 0.15); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.adv-icon svg { width: 20px; height: 20px; stroke: var(--accent); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.adv-card h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; }
.adv-card p { font-size: 0.86rem; color: var(--text-sub); line-height: 1.7; }

/* FAQ */
.faq-section { background: var(--bg); }
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-item details { padding: 20px 0; }
.faq-item summary { cursor: pointer; font-size: 1rem; font-weight: 600; color: var(--text-main); list-style: none; display: flex; align-items: center; gap: 12px; position: relative; padding-right: 40px; transition: color var(--transition); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 6px; top: 50%; transform: translateY(-50%); font-size: 1.4rem; color: var(--primary); font-weight: 400; transition: transform var(--transition); }
.faq-item details[open] summary { color: var(--primary); }
.faq-item details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item details p { padding-top: 14px; color: var(--text-sub); font-size: 0.92rem; line-height: 1.8; padding-right: 32px; }

/* CTA */
.cta-section { position: relative; background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat; padding: 96px 0; }
.cta-section::before { content: ""; position: absolute; inset: 0; background: rgba(11, 15, 18, 0.78); }
.cta-panel { position: relative; z-index: 2; max-width: 720px; margin: 0 auto; text-align: center; padding: 48px 48px; background: rgba(255, 255, 255, 0.06); border: 1px solid rgba(255, 255, 255, 0.1); border-radius: var(--radius-xl); backdrop-filter: blur(10px); }
.cta-panel h2 { font-size: clamp(1.7rem, 3vw, 2.2rem); color: #fff; font-weight: 700; margin-bottom: 14px; }
.cta-panel p { color: rgba(255, 255, 255, 0.7); font-size: 0.98rem; margin-bottom: 30px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* Footer */
.site-footer { background: var(--bg-deep); border-top: 1px solid var(--border-deep); padding: 64px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 0.8fr 0.8fr 1.2fr; gap: 48px; margin-bottom: 48px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-desc { color: var(--text-sub); font-size: 0.9rem; line-height: 1.8; margin-bottom: 18px; max-width: 320px; }
.footer-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.footer-tags span { background: rgba(255, 255, 255, 0.06); border-radius: var(--radius-s); padding: 4px 10px; font-size: 0.76rem; color: var(--text-sub); border: 1px solid var(--border-deep); }
.footer-col h4 { font-size: 0.8rem; color: #fff; font-weight: 600; letter-spacing: 0.12em; margin-bottom: 18px; text-transform: uppercase; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { color: var(--text-sub); font-size: 0.9rem; transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--primary); }
.footer-col ul li a:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: var(--radius-s); }
.footer-contact p { display: flex; align-items: flex-start; gap: 8px; color: var(--text-sub); font-size: 0.88rem; margin-bottom: 12px; line-height: 1.5; }
.footer-contact svg { width: 16px; height: 16px; stroke: var(--primary); flex-shrink: 0; margin-top: 4px; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.footer-bottom { border-top: 1px solid var(--border-deep); padding-top: 28px; text-align: center; color: var(--text-weak); font-size: 0.8rem; }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.revealed { opacity: 1; transform: translateY(0); }

/* responsive */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}
@media (max-width: 1024px) {
  .section { padding: 72px 0; }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .process-step::before { display: none; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .header-inner { gap: 16px; }
  .header-search { flex-basis: 340px; }
  .nav-menu { gap: 18px; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .header-inner { flex-wrap: wrap; min-height: auto; padding-top: 14px; padding-bottom: 14px; gap: 12px; }
  .header-search { order: 3; flex: 1 1 100%; max-width: none; margin-left: 0; }
  .nav-menu { display: none; }
  .header-cta { display: none; }
  .mobile-toggle { display: flex; }
  .page-hero { min-height: 60vh; }
  .hero-content { padding: 80px 0; }
  .hero-title { font-size: clamp(2rem, 6vw, 2.8rem); }
  .hero-subtitle { font-size: 1rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .product-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; gap: 20px; }
  .adv-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-panel { padding: 32px 24px; }
  .section-head { margin-bottom: 36px; }
}
@media (max-width: 520px) {
  .stats-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .stat-num { font-size: 1.7rem; }
  .cta-actions { flex-direction: column; align-items: stretch; }
  .cta-actions .btn { width: 100%; }
  .faq-item summary { font-size: 0.95rem; }
  .container { padding: 0 18px; }
}