/* roulang page: index */
:root {
  --bg-primary: #0A0F1E;
  --bg-secondary: #111827;
  --bg-tertiary: #0D1526;
  --accent-cyan: #22D3EE;
  --accent-green: #10B981;
  --accent-gold: #F59E0B;
  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-tertiary: #64748B;
  --border-default: rgba(255,255,255,0.08);
  --border-hover: rgba(34,211,238,0.4);
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.35);
  --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
  position: relative;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}
a { color: inherit; text-decoration: none; transition: color 0.25s, border-color 0.25s, box-shadow 0.25s; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
input { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }
.relative { position: relative; }
/* 导航 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: rgba(10,15,30,0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-default);
  z-index: 100;
  transition: background 0.3s, box-shadow 0.3s;
}
.site-header.scrolled {
  background: rgba(10,15,30,0.9);
  box-shadow: 0 4px 30px rgba(0,0,0,0.4);
}
.header-bar { display: flex; align-items: center; height: 72px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-icon {
  width: 40px; height: 40px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 16px rgba(34,211,238,0.3);
}
.brand-text { font-size: 20px; font-weight: 800; letter-spacing: 0.02em; white-space: nowrap; }
.search-box {
  flex: 1; max-width: 460px; height: 44px; display: flex; align-items: center;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 999px; padding: 0 16px; gap: 10px;
  transition: border-color 0.25s, box-shadow 0.25s;
  margin: 0 auto;
}
.search-box:focus-within {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 4px rgba(34,211,238,0.15);
}
.search-box .search-icon { color: var(--text-secondary); flex-shrink: 0; }
.search-box input {
  flex: 1; background: transparent; border: none; outline: none;
  color: var(--text-primary); font-size: 14px;
}
.search-box input::placeholder { color: var(--text-tertiary); }
.search-kbd {
  background: rgba(255,255,255,0.1); color: var(--text-secondary);
  font-size: 12px; padding: 2px 10px; border-radius: 6px; white-space: nowrap;
}
.nav-links { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
.nav-link {
  font-size: 14px; color: var(--text-secondary); position: relative; font-weight: 500;
  padding: 6px 2px; white-space: nowrap;
}
.nav-link:hover { color: var(--accent-cyan); }
.nav-link.active { color: var(--accent-cyan); }
.nav-link.active::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0;
  height: 2px; background: var(--accent-cyan); border-radius: 2px;
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border-radius: 999px; font-weight: 600; border: none;
  transition: transform 0.25s, box-shadow 0.25s, filter 0.25s, background 0.25s, color 0.25s;
  outline: none; white-space: nowrap;
}
.btn:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible {
  outline: none; box-shadow: 0 0 0 4px rgba(34,211,238,0.2);
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  color: #081018;
  box-shadow: 0 8px 24px rgba(16,185,129,0.35);
}
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); box-shadow: 0 12px 32px rgba(16,185,129,0.45); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 6px 16px rgba(16,185,129,0.35); }
.btn-secondary {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--text-primary);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.btn-secondary:hover { border-color: rgba(34,211,238,0.5); color: var(--accent-cyan); }
.btn-secondary:active { transform: translateY(0); }
.btn-sm { height: 36px; padding: 0 20px; font-size: 13px; }
.btn-md { height: 44px; padding: 0 28px; font-size: 14px; }
.btn-lg { height: 50px; padding: 0 36px; font-size: 15px; }
.btn-icon {
  width: 44px; height: 44px; border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border-default);
  display: inline-flex; align-items: center; justify-content: center;
  transition: all 0.25s;
}
.btn-icon:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); box-shadow: 0 0 20px rgba(34,211,238,0.15); }
.hamburger {
  display: none; width: 40px; height: 40px; border-radius: 10px;
  background: rgba(255,255,255,0.08); border: 1px solid var(--border-default);
  flex-direction: column; align-items: center; justify-content: center; gap: 5px;
}
.hamburger span { width: 18px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: all 0.3s; }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
/* Hero */
.hero {
  position: relative;
  padding: 180px 0 120px;
  background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  min-height: 100vh;
  display: flex; align-items: center;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,15,30,0.6), var(--bg-primary) 92%);
  z-index: 0;
}
.hero::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 20%, rgba(34,211,238,0.08), rgba(16,185,129,0.04) 40%, transparent 70%);
  z-index: 0;
}
.hero-grid { display: grid; grid-template-columns: 58% 42%; gap: 60px; align-items: center; position: relative; z-index: 1; }
.hero-title {
  font-size: 46px; font-weight: 800; line-height: 1.2; letter-spacing: -0.02em;
  color: var(--text-primary); margin-bottom: 24px;
}
.hero-title .grad {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub { font-size: 17px; color: var(--text-secondary); line-height: 1.75; margin-bottom: 36px; max-width: 520px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-btns .btn { animation: riseIn 0.6s ease forwards; opacity: 0; }
.hero-btns .btn:nth-child(1) { animation-delay: 0.1s; }
.hero-btns .btn:nth-child(2) { animation-delay: 0.2s; }
@keyframes riseIn {
  0% { transform: translateY(20px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}
.hero-note { font-size: 12px; color: var(--text-tertiary); margin-top: 16px; }
.hero-visual {
  position: relative;
  display: flex; justify-content: center;
}
.phone-card {
  width: 300px;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 36px;
  padding: 14px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  transition: transform 0.4s, box-shadow 0.4s;
}
.phone-card:hover { transform: translateY(-6px); box-shadow: 0 24px 70px rgba(0,0,0,0.55), 0 0 40px rgba(34,211,238,0.1); }
.phone-screen {
  border-radius: 26px; overflow: hidden; aspect-ratio: 9/19;
  background: linear-gradient(145deg, #0D1526, #16213a);
}
.phone-screen img { width: 100%; height: 100%; object-fit: cover; }
.phone-float-btn {
  position: absolute; right: 12px; bottom: 30px;
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-green));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(16,185,129,0.45);
}
/* 区块通用 */
.section { padding: 120px 0; position: relative; }
.section-alt { background: var(--bg-tertiary); }
.section-head { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block; font-size: 12px; font-weight: 700;
  color: var(--accent-cyan); letter-spacing: 0.12em;
  background: rgba(34,211,238,0.1);
  padding: 6px 16px; border-radius: 999px;
  margin-bottom: 16px; border: 1px solid rgba(34,211,238,0.2);
}
.section-title { font-size: 32px; font-weight: 700; color: var(--text-primary); letter-spacing: -0.02em; }
.section-desc { font-size: 15px; color: var(--text-secondary); max-width: 720px; margin: 16px auto 0; }
/* 功能轮播 */
.feature-wrap { position: relative; }
.feature-slider {
  display: flex; gap: 20px; overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 20px;
  scrollbar-width: none;
}
.feature-slider::-webkit-scrollbar { display: none; }
.feature-card {
  flex: 0 0 280px;
  scroll-snap-align: start;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 16px;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}
.feature-card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.feature-thumb {
  border-radius: 16px; overflow: hidden; height: 150px; margin-bottom: 16px;
  background: linear-gradient(145deg, #0D1526, #1a2741);
}
.feature-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.feature-card:hover .feature-thumb img { transform: scale(1.05); filter: brightness(1.1); }
.feature-name { font-size: 18px; font-weight: 600; color: var(--text-primary); margin-bottom: 6px; }
.feature-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.5; }
.slider-controls { display: flex; justify-content: center; gap: 16px; margin-top: 28px; }
/* 系统要求 */
.sys-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.sys-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 36px;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.sys-card:hover { border-color: var(--border-hover); box-shadow: var(--shadow-hover); }
.sys-card-head { display: flex; align-items: center; gap: 16px; margin-bottom: 28px; }
.sys-icon {
  width: 48px; height: 48px; border-radius: 14px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border-default);
  display: flex; align-items: center; justify-content: center;
}
.sys-card-title { font-size: 20px; font-weight: 700; }
.sys-list { list-style: none; margin-bottom: 24px; }
.sys-list li {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 0; border-bottom: 1px dashed rgba(255,255,255,0.08);
}
.sys-list li:last-child { border-bottom: none; }
.sys-label { font-size: 14px; color: var(--text-tertiary); flex-shrink: 0; width: 80px; }
.sys-value { font-size: 14px; color: var(--text-primary); font-weight: 500; }
/* 资讯区 */
.news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (min-width: 768px) {
  .news-grid .news-card:nth-child(even) { margin-top: 24px; }
}
.news-card {
  display: flex; gap: 16px; padding: 20px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  transition: all 0.25s;
}
.news-card:hover { transform: translateY(-4px); border-color: var(--border-hover); box-shadow: var(--shadow-hover); }
.news-thumb {
  width: 96px; height: 96px; border-radius: 16px; overflow: hidden; flex-shrink: 0;
  background: linear-gradient(145deg, #0D1526, #1a2741);
}
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-body { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.tag {
  display: inline-block; font-size: 12px; color: var(--accent-cyan);
  background: rgba(34,211,238,0.08);
  border: 1px solid rgba(34,211,238,0.25);
  padding: 2px 12px; border-radius: 999px;
  margin-bottom: 8px; align-self: flex-start;
}
.news-card:hover .tag { color: var(--accent-cyan); background: rgba(34,211,238,0.15); }
.news-title {
  font-size: 17px; font-weight: 600; color: var(--text-primary); line-height: 1.4;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 6px;
}
.news-card:hover .news-title { color: var(--accent-cyan); }
.news-summary {
  font-size: 13px; color: var(--text-secondary); line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 8px; flex: 1;
}
.news-meta { display: flex; gap: 16px; font-size: 12px; color: var(--text-tertiary); }
.news-empty {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-height: 260px; background: rgba(255,255,255,0.03);
  border: 1px dashed rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  color: var(--text-secondary); text-align: center;
  grid-column: 1 / -1; padding: 40px;
}
.news-empty-icon {
  width: 120px; height: 120px; border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-default);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.news-empty p { font-size: 15px; color: var(--text-tertiary); }
/* 评价墙 */
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.review-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.25s;
}
.review-card:hover { border-color: rgba(34,211,238,0.3); }
.review-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.review-avatar {
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, rgba(34,211,238,0.3), rgba(16,185,129,0.3));
  border: 1px solid rgba(255,255,255,0.15);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: var(--text-primary); font-weight: 700;
}
.review-name { font-size: 14px; color: var(--text-primary); font-weight: 600; }
.review-stars { display: flex; gap: 2px; color: var(--accent-gold); font-size: 13px; margin-top: 2px; }
.review-text { font-size: 14px; color: var(--text-secondary); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }
.overall-score { text-align: center; margin-bottom: 44px; }
.overall-score .score-num { font-size: 48px; font-weight: 800; color: var(--text-primary); line-height: 1; }
.overall-score .score-stars { display: flex; justify-content: center; gap: 4px; color: var(--accent-gold); font-size: 18px; margin-top: 8px; }
/* FAQ */
.faq-list { max-width: 820px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid rgba(255,255,255,0.08); }
.faq-item:last-child { border-bottom: none; }
.faq-question {
  display: flex; align-items: center; gap: 16px;
  width: 100%; padding: 0 8px; height: 56px;
  background: transparent; border: none;
  color: var(--text-primary); font-size: 16px; font-weight: 600;
  text-align: left; transition: color 0.25s;
}
.faq-question:hover { color: var(--accent-cyan); }
.faq-icon {
  width: 24px; height: 24px; border-radius: 6px; position: relative; flex-shrink: 0;
  background: rgba(255,255,255,0.06); border: 1px solid var(--border-default);
  transition: all 0.3s;
}
.faq-icon::before, .faq-icon::after {
  content: ''; position: absolute; top: 50%; left: 50%;
  background: var(--text-secondary); border-radius: 1px;
  transition: all 0.3s;
}
.faq-icon::before { width: 10px; height: 2px; transform: translate(-50%, -50%); }
.faq-icon::after { width: 2px; height: 10px; transform: translate(-50%, -50%); }
.faq-item.active .faq-icon { transform: rotate(45deg); border-color: var(--accent-cyan); }
.faq-item.active .faq-icon::before, .faq-item.active .faq-icon::after { background: var(--accent-cyan); }
.faq-answer {
  max-height: 0; overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 16px;
}
.faq-item.active .faq-answer { max-height: 240px; padding: 0 16px 20px 40px; }
.faq-answer p { font-size: 15px; color: var(--text-secondary); line-height: 1.75; }
/* CTA */
.cta-section { padding: 120px 0; position: relative; }
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 100%, rgba(16,185,129,0.08), rgba(34,211,238,0.02) 50%, transparent 70%);
}
.cta-card {
  max-width: 860px; margin: 0 auto;
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 28px;
  padding: 48px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}
.cta-title { font-size: 32px; font-weight: 700; margin-bottom: 12px; }
.cta-sub { font-size: 15px; color: var(--text-secondary); margin-bottom: 32px; }
.cta-form { display: flex; gap: 12px; max-width: 460px; margin: 0 auto 32px; }
.cta-form input {
  flex: 1; height: 48px; border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  padding: 0 20px; color: var(--text-primary); font-size: 14px; outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.cta-form input::placeholder { color: var(--text-tertiary); }
.cta-form input:focus { border-color: var(--accent-cyan); box-shadow: 0 0 0 4px rgba(34,211,238,0.15); }
.cta-form .btn { flex-shrink: 0; }
.form-success { display: none; align-items: center; gap: 10px; justify-content: center; font-size: 14px; color: var(--accent-green); margin-bottom: 20px; }
.form-success.show { display: flex; }
.download-row { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin-top: 24px; }
.download-btn {
  display: inline-flex; align-items: center; gap: 12px;
  padding: 14px 28px; border-radius: 18px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-default);
  transition: all 0.25s; min-width: 180px;
}
.download-btn:hover { border-color: var(--accent-cyan); box-shadow: 0 0 24px rgba(34,211,238,0.12); transform: translateY(-2px); }
.download-btn .dl-icon { color: var(--accent-cyan); }
.download-btn .dl-label { font-size: 15px; font-weight: 600; color: var(--text-primary); }
.download-btn .dl-sub { font-size: 12px; color: var(--text-tertiary); }
.qr-box { margin-top: 32px; }
.qr-placeholder {
  width: 160px; height: 160px; margin: 0 auto;
  background: rgba(255,255,255,0.9);
  border-radius: 16px; display: flex; align-items: center; justify-content: center;
}
.qr-placeholder span { color: #333; font-size: 12px; background: #eee; padding: 30px 20px; border-radius: 8px; }
.qr-box p { font-size: 12px; color: var(--text-tertiary); margin-top: 12px; }
/* 页脚 */
.site-footer {
  border-top: 1px solid var(--border-default);
  background: rgba(10,15,30,0.9);
  padding-top: 64px;
}
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; padding-bottom: 48px; }
.footer-brand .brand { margin-bottom: 16px; }
.footer-desc { font-size: 13px; color: var(--text-tertiary); line-height: 1.7; max-width: 260px; }
.footer-title { font-size: 14px; font-weight: 700; margin-bottom: 16px; color: var(--text-primary); }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 13px; color: var(--text-secondary); }
.footer-links a:hover { color: var(--accent-cyan); }
.footer-contact { display: flex; flex-direction: column; gap: 12px; font-size: 13px; color: var(--text-secondary); }
.footer-social { display: flex; gap: 12px; margin-top: 8px; }
.footer-social .social-btn {
  width: 36px; height: 36px; border-radius: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-default);
  display: flex; align-items: center; justify-content: center;
  transition: all 0.25s;
}
.footer-social .social-btn:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  height: 48px; display: flex; align-items: center; justify-content: center;
  gap: 16px; font-size: 12px; color: var(--text-tertiary);
}
/* 响应式 */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-title { font-size: 38px; }
  .nav-links { gap: 8px; }
  .product-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .container { padding: 0 16px; }
  .section { padding: 64px 0; }
  .header-bar { flex-wrap: wrap; height: auto; padding: 12px 0; gap: 8px; }
  .site-header { height: auto; }
  .site-header.scrolled { background: rgba(10,15,30,0.9); }
  .brand { order: 1; }
  .hamburger { display: flex; order: 3; }
  .nav-links {
    display: none; order: 4; width: 100%;
    flex-direction: column; align-items: flex-start;
    padding: 12px 0; gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-links .nav-link { width: 100%; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,0.06); }
  .nav-links .nav-link.active::after { display: none; }
  .search-box { order: 4; width: 100%; max-width: none; margin: 0; }
  .header-bar .btn-download { order: 2; }
  .hero { padding: 140px 0 80px; min-height: auto; }
  .hero-title { font-size: 30px; }
  .hero-sub { font-size: 15px; }
  .phone-card { width: 260px; }
  .news-grid { grid-template-columns: 1fr; }
  .news-grid .news-card:nth-child(even) { margin-top: 0; }
  .review-grid { grid-template-columns: 1fr; }
  .sys-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-card { padding: 32px 20px; }
  .cta-form { flex-direction: column; }
  .section-title { font-size: 26px; }
  .footer-bottom { flex-direction: column; height: auto; padding: 16px 0; gap: 4px; }
  .feature-card { flex: 0 0 240px; }
  .download-btn { width: 100%; justify-content: center; }
}
@media (max-width: 520px) {
  .hero-btns .btn { width: 100%; }
  .news-card { flex-direction: column; }
  .news-thumb { width: 100%; height: 160px; }
  .cta-form .btn { width: 100%; }
}

/* roulang page: category1 */
:root{
    --bg:#0A0F1E;
    --bg-panel:#0D1526;
    --bg-card:#111827;
    --accent:#22D3EE;
    --success:#10B981;
    --gold:#F59E0B;
    --text-primary:#F8FAFC;
    --text-secondary:#94A3B8;
    --text-tertiary:#64748B;
    --border:rgba(255,255,255,0.08);
    --border-hover:rgba(34,211,238,0.4);
    --radius-lg:20px;
    --radius-md:12px;
    --radius-sm:8px;
    --shadow-card:0 8px 32px rgba(0,0,0,0.25);
    --shadow-hover:0 12px 40px rgba(0,0,0,0.35), 0 0 20px rgba(34,211,238,0.08);
    --transition:all 0.25s ease;
  }

  *{box-sizing:border-box;}
  html,body{padding:0;margin:0;}
  body{
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    background:var(--bg);
    background-image:linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size:48px 48px;
    color:var(--text-primary);
    line-height:1.75;
    font-size:15px;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none;transition:var(--transition);}
  img{max-width:100%;display:block;}
  button,input{font-family:inherit;font-size:inherit;}
  .container{max-width:1200px;margin:0 auto;padding-left:16px;padding-right:16px;}
  .section{padding:64px 0;}
  .section-title{font-size:30px;font-weight:700;letter-spacing:-0.02em;line-height:1.3;margin-bottom:12px;}
  .section-sub{color:var(--text-secondary);font-size:15px;margin-bottom:44px;}
  .section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}

  /* Header */
  .site-header{
    position:sticky;top:0;z-index:100;
    background:rgba(10,15,30,0.75);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid rgba(255,255,255,0.06);
    transition:background 0.3s ease,box-shadow 0.3s ease;
  }
  .site-header.scrolled{
    background:rgba(10,15,30,0.9);
    box-shadow:0 8px 32px rgba(0,0,0,0.3);
  }
  .header-inner{
    display:flex;align-items:center;gap:20px;
    height:72px;
  }
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
  .brand-icon{
    width:40px;height:40px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,#22D3EE,#10B981);
    box-shadow:0 4px 16px rgba(34,211,238,0.35);
  }
  .brand-text{font-size:20px;font-weight:800;letter-spacing:0.02em;color:var(--text-primary);}
  .search-box{
    flex:1;max-width:480px;margin:0 auto;
    display:flex;align-items:center;gap:8px;
    height:44px;padding:0 16px;
    background:rgba(255,255,255,0.08);
    border:1px solid rgba(255,255,255,0.1);
    border-radius:999px;
    transition:var(--transition);
  }
  .search-box:focus-within{border-color:var(--accent);box-shadow:0 0 0 4px rgba(34,211,238,0.15);}
  .search-box svg{flex-shrink:0;color:var(--text-tertiary);}
  .search-box input{
    flex:1;background:transparent;border:none;outline:none;
    color:var(--text-primary);font-size:14px;
  }
  .search-box input::placeholder{color:var(--text-tertiary);}
  .search-kbd{
    font-size:11px;color:var(--text-tertiary);
    background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.1);
    border-radius:6px;padding:2px 6px;letter-spacing:0.05em;
  }
  .nav-links{display:flex;align-items:center;gap:18px;flex-shrink:0;}
  .nav-link{font-size:14px;font-weight:500;color:var(--text-secondary);position:relative;padding:6px 2px;}
  .nav-link:hover{color:var(--text-primary);}
  .nav-link.active{color:var(--accent);}
  .nav-link.active::after{
    content:'';position:absolute;left:0;right:0;bottom:0;height:2px;
    background:var(--accent);border-radius:2px;
  }
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:999px;font-weight:600;cursor:pointer;
    transition:var(--transition);border:none;outline:none;
  }
  .btn:focus{outline:none;box-shadow:0 0 0 4px rgba(34,211,238,0.2);}
  .btn-primary{
    background:linear-gradient(135deg,#22D3EE,#10B981);
    color:#0A0F1E;
    box-shadow:0 8px 24px rgba(16,185,129,0.35);
  }
  .btn-primary:hover{
    filter:brightness(1.1);transform:translateY(-1px);
    box-shadow:0 12px 32px rgba(16,185,129,0.45);
  }
  .btn-primary:active{transform:translateY(0);box-shadow:0 6px 16px rgba(16,185,129,0.3);}
  .btn-secondary{
    background:rgba(255,255,255,0.05);
    border:1px solid rgba(255,255,255,0.15);
    color:var(--text-primary);
  }
  .btn-secondary:hover{border-color:rgba(34,211,238,0.5);color:var(--accent);}
  .btn-sm{height:36px;padding:0 20px;font-size:13px;}
  .btn-lg{height:48px;padding:0 28px;font-size:15px;}
  .nav-toggle{display:none;width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.1);align-items:center;justify-content:center;cursor:pointer;color:var(--text-primary);}
  .mobile-search{display:none;padding:0 16px 16px;}
  .mobile-search .search-box{max-width:100%;margin-bottom:8px;}
  .mobile-menu{display:none;padding:0 16px 20px;flex-direction:column;gap:6px;}
  .mobile-menu .nav-link{padding:10px 8px;border-radius:8px;font-size:16px;color:var(--text-secondary);}
  .mobile-menu .nav-link:hover{background:rgba(255,255,255,0.06);color:var(--text-primary);}
  .mobile-menu .nav-link.active{background:rgba(34,211,238,0.1);color:var(--accent);}
  .mobile-menu .nav-link.active::after{display:none;}

  /* Hero */
  .page-hero{
    position:relative;padding:72px 0 56px;
    background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  }
  .page-hero::before{
    content:'';position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(10,15,30,0.75),#0A0F1E 96%);
  }
  .page-hero::after{
    content:'';position:absolute;inset:0;pointer-events:none;
    background:radial-gradient(ellipse at 80% 20%,rgba(34,211,238,0.08),transparent 60%);
  }
  .page-hero .container{position:relative;z-index:2;}
  .breadcrumb{font-size:13px;color:var(--text-tertiary);margin-bottom:18px;display:flex;align-items:center;gap:6px;}
  .breadcrumb a{color:var(--text-tertiary);}
  .breadcrumb a:hover{color:var(--accent);}
  .page-hero h1{font-size:34px;font-weight:800;letter-spacing:-0.02em;color:var(--text-primary);margin:0 0 16px;}
  .page-hero .hero-desc{font-size:15px;color:var(--text-secondary);max-width:640px;line-height:1.75;margin-bottom:32px;}
  .filter-bar{
    display:flex;align-items:center;justify-content:space-between;
    padding:14px 0;border-bottom:1px solid rgba(255,255,255,0.08);
    margin-top:12px;
  }
  .filter-tabs{display:flex;gap:10px;}
  .filter-tab{
    padding:6px 18px;border-radius:999px;font-size:13px;font-weight:500;
    background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.1);
    color:var(--text-secondary);cursor:pointer;transition:var(--transition);
  }
  .filter-tab:hover{border-color:rgba(34,211,238,0.4);color:var(--text-primary);}
  .filter-tab.active{background:rgba(34,211,238,0.12);border-color:var(--accent);color:var(--accent);}
  .filter-count{font-size:13px;color:var(--text-tertiary);}

  /* Spotlight */
  .spotlight-section{padding:48px 0 8px;}
  .spotlight-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
  .spotlight-card{
    position:relative;height:260px;border-radius:var(--radius-lg);overflow:hidden;
    border:1px solid var(--border);box-shadow:var(--shadow-card);
    display:flex;align-items:flex-end;
  }
  .spotlight-card img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease;}
  .spotlight-card:hover img{transform:scale(1.03);}
  .spotlight-card::after{
    content:'';position:absolute;inset:0;
    background:linear-gradient(180deg,transparent 40%,rgba(10,15,30,0.85) 100%);
  }
  .spotlight-content{position:relative;z-index:2;padding:28px 24px;}
  .spotlight-tag{
    display:inline-block;font-size:12px;color:var(--accent);
    background:rgba(34,211,238,0.12);border:1px solid rgba(34,211,238,0.3);
    padding:3px 10px;border-radius:999px;margin-bottom:10px;
  }
  .spotlight-content h3{font-size:20px;font-weight:700;margin:0 0 6px;color:var(--text-primary);}
  .spotlight-content p{font-size:13px;color:var(--text-secondary);margin:0;}

  /* Media Grid */
  .media-grid-section{padding:48px 0;}
  .media-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
  .media-card{
    background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);
    overflow:hidden;box-shadow:var(--shadow-card);transition:var(--transition);
    display:flex;flex-direction:column;
  }
  .media-card:hover{
    transform:translateY(-4px);
    border-color:var(--border-hover);
    box-shadow:var(--shadow-hover);
  }
  .media-head{position:relative;aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,#1E293B,#0F172A);}
  .media-head img{width:100%;height:100%;object-fit:cover;transition:transform 0.4s ease;}
  .media-card:hover .media-head img{transform:scale(1.03);}
  .media-head .tag{
    position:absolute;left:14px;top:14px;font-size:12px;color:var(--accent);
    background:rgba(10,15,30,0.75);border:1px solid rgba(34,211,238,0.3);
    padding:3px 10px;border-radius:999px;backdrop-filter:blur(8px);
  }
  .media-body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1;}
  .media-body h3{font-size:16px;font-weight:600;line-height:1.5;color:var(--text-primary);margin:0 0 8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .media-body p{font-size:13px;color:var(--text-secondary);line-height:1.6;margin:0 0 18px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
  .media-meta{font-size:12px;color:var(--text-tertiary);display:flex;align-items:center;gap:10px;margin-top:auto;}
  .media-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--text-tertiary);}

  /* Features */
  .features-section{background:var(--bg-panel);}
  .features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
  .feature-card{
    background:rgba(255,255,255,0.04);border:1px solid var(--border);border-radius:var(--radius-lg);
    padding:28px 24px;transition:var(--transition);
  }
  .feature-card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-hover);transform:translateY(-3px);}
  .feature-icon{
    width:48px;height:48px;border-radius:14px;margin-bottom:16px;
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,rgba(34,211,238,0.15),rgba(16,185,129,0.15));
    border:1px solid rgba(34,211,238,0.25);color:var(--accent);
  }
  .feature-card h3{font-size:16px;font-weight:600;margin:0 0 8px;color:var(--text-primary);}
  .feature-card p{font-size:13px;color:var(--text-secondary);margin:0;line-height:1.6;}

  /* Stats */
  .stats-section{padding:48px 0;}
  .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
  .stat-box{
    text-align:center;padding:28px 16px;border-radius:var(--radius-lg);
    background:rgba(255,255,255,0.03);border:1px solid var(--border);
  }
  .stat-box .stat-num{font-size:32px;font-weight:800;color:var(--accent);letter-spacing:-0.02em;line-height:1.2;}
  .stat-box .stat-label{font-size:13px;color:var(--text-secondary);margin-top:6px;}
  .stat-box .stat-num.gold{color:var(--gold);}

  /* FAQ */
  .faq-section{padding:48px 0;background:var(--bg);}
  .faq-list{max-width:860px;margin:0 auto;}
  .faq-item{border-bottom:1px solid rgba(255,255,255,0.08);}
  .faq-item:first-child{border-top:1px solid rgba(255,255,255,0.08);}
  .faq-question{
    display:flex;align-items:center;justify-content:space-between;gap:20px;
    width:100%;background:transparent;border:none;cursor:pointer;
    padding:18px 4px;text-align:left;color:var(--text-primary);
    font-weight:600;font-size:15px;transition:var(--transition);
  }
  .faq-question:hover{color:var(--accent);}
  .faq-icon{flex-shrink:0;width:28px;height:28px;border-radius:8px;background:rgba(255,255,255,0.06);display:flex;align-items:center;justify-content:center;position:relative;transition:var(--transition);}
  .faq-icon::before,.faq-icon::after{content:'';position:absolute;background:var(--text-secondary);border-radius:2px;transition:var(--transition);}
  .faq-icon::before{width:10px;height:2px;}
  .faq-icon::after{width:2px;height:10px;}
  .faq-item.open .faq-icon{background:rgba(34,211,238,0.15);}
  .faq-item.open .faq-icon::after{transform:rotate(90deg);opacity:0;}
  .faq-item.open .faq-icon::before{background:var(--accent);}
  .faq-answer{max-height:0;overflow:hidden;transition:max-height 0.3s ease;}
  .faq-answer p{padding:0 4px 20px;margin:0;font-size:14px;color:var(--text-secondary);line-height:1.75;background:rgba(255,255,255,0.03);border-radius:12px;padding:16px 20px 20px;}

  /* CTA */
  .cta-section{padding:48px 0 72px;}
  .cta-card{
    background:rgba(255,255,255,0.05);backdrop-filter:blur(20px);
    -webkit-backdrop-filter:blur(20px);
    border:1px solid rgba(255,255,255,0.1);border-radius:24px;
    padding:48px 24px;text-align:center;
    box-shadow:var(--shadow-card);
    position:relative;overflow:hidden;
  }
  .cta-card::before{
    content:'';position:absolute;top:-60%;left:50%;transform:translateX(-50%);
    width:600px;height:400px;pointer-events:none;
    background:radial-gradient(ellipse,rgba(34,211,238,0.12),transparent 70%);
  }
  .cta-card h2{font-size:28px;font-weight:700;letter-spacing:-0.02em;margin:0 0 10px;color:var(--text-primary);position:relative;}
  .cta-card .cta-sub{font-size:15px;color:var(--text-secondary);margin-bottom:28px;position:relative;}
  .cta-form{display:flex;gap:12px;max-width:480px;margin:0 auto 32px;position:relative;}
  .cta-input{
    flex:1;height:48px;padding:0 20px;border-radius:999px;
    background:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12);
    color:var(--text-primary);font-size:14px;outline:none;transition:var(--transition);
  }
  .cta-input::placeholder{color:var(--text-tertiary);}
  .cta-input:focus{border-color:var(--accent);box-shadow:0 0 0 4px rgba(34,211,238,0.12);}
  .cta-form .btn{height:48px;padding:0 28px;flex-shrink:0;}
  .cta-buttons{display:flex;justify-content:center;gap:16px;flex-wrap:wrap;position:relative;}
  .cta-download-btn{
    display:flex;align-items:center;gap:10px;
    background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.14);
    border-radius:16px;padding:12px 22px;color:var(--text-primary);transition:var(--transition);
  }
  .cta-download-btn:hover{border-color:var(--accent);background:rgba(34,211,238,0.08);transform:translateY(-2px);}
  .cta-download-btn .btn-title{font-size:14px;font-weight:600;display:block;line-height:1.3;}
  .cta-download-btn .btn-sub{font-size:11px;color:var(--text-tertiary);display:block;line-height:1.3;}
  .cta-qr{margin-top:36px;position:relative;}
  .cta-qr-box{
    width:160px;height:160px;border-radius:16px;background:#fff;
    margin:0 auto 10px;display:flex;align-items:center;justify-content:center;
  }
  .cta-qr-box span{width:104px;height:104px;background:linear-gradient(135deg,#E2E8F0,#CBD5E1);border-radius:8px;display:block;}
  .cta-qr-text{font-size:12px;color:var(--text-tertiary);}
  .form-success{display:none;color:var(--success);font-size:14px;margin-top:12px;align-items:center;gap:8px;justify-content:center;}
  .form-success.show{display:flex;}

  /* Footer */
  .site-footer{background:var(--bg-panel);border-top:1px solid rgba(255,255,255,0.06);}
  .footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding:48px 0 32px;}
  .footer-brand .brand{margin-bottom:12px;}
  .footer-desc{font-size:13px;color:var(--text-secondary);line-height:1.7;max-width:280px;margin:12px 0 0;}
  .footer-title{font-size:14px;font-weight:600;color:var(--text-primary);margin:0 0 14px;}
  .footer-links{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px;}
  .footer-links a{font-size:13px;color:var(--text-secondary);}
  .footer-links a:hover{color:var(--accent);}
  .footer-contact{display:flex;flex-direction:column;gap:14px;}
  .footer-contact span{font-size:13px;color:var(--text-secondary);word-break:break-all;}
  .footer-social{display:flex;gap:10px;}
  .social-btn{
    width:36px;height:36px;border-radius:10px;
    display:flex;align-items:center;justify-content:center;
    background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.1);
    color:var(--text-secondary);transition:var(--transition);
  }
  .social-btn:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px);}
  .footer-bottom{
    border-top:1px solid rgba(255,255,255,0.06);
    padding:16px 0;display:flex;align-items:center;justify-content:center;gap:20px;
    font-size:12px;color:var(--text-tertiary);flex-wrap:wrap;
  }

  /* Return button */
  .back-home{display:flex;justify-content:center;padding:0 0 64px;}

  /* Responsive */
  @media (max-width:1024px){
    .media-grid{grid-template-columns:repeat(2,1fr);}
    .features-grid{grid-template-columns:repeat(2,1fr);}
    .stats-grid{grid-template-columns:repeat(2,1fr);}
    .footer-grid{grid-template-columns:1fr 1fr;}
    .nav-links{display:none;}
    .search-box{display:none;}
    .nav-toggle{display:flex;}
    .mobile-search{display:block;}
  }
  @media (max-width:768px){
    .section{padding:48px 0;}
    .spotlight-grid{grid-template-columns:1fr;}
    .spotlight-card{height:220px;}
    .media-grid{grid-template-columns:1fr;}
    .features-grid{grid-template-columns:1fr;}
    .stats-grid{grid-template-columns:repeat(2,1fr);}
    .footer-grid{grid-template-columns:1fr;}
    .page-hero{padding:48px 0 40px;}
    .page-hero h1{font-size:28px;}
    .section-title{font-size:24px;}
    .cta-card{padding:36px 20px;}
    .cta-form{flex-direction:column;}
    .cta-buttons{gap:12px;}
    .header-inner{height:64px;gap:12px;}
    .brand-text{font-size:17px;}
    .brand-icon{width:36px;height:36px;}
    .btn-sm{height:34px;padding:0 16px;font-size:12px;}
    .footer-bottom{gap:12px;}
  }
  @media (max-width:520px){
    .stats-grid{grid-template-columns:1fr;}
    .spotlight-content h3{font-size:17px;}
    .media-card h3{font-size:15px;}
    .features-grid{grid-template-columns:1fr;}
  }

  /* Animations */
  @keyframes fadeUpIn{
    from{opacity:0;transform:translateY(20px);}
    to{opacity:1;transform:translateY(0);}
  }
  .animate-fade-up{animation:fadeUpIn 0.6s ease both;}
  .delay-1{animation-delay:0.1s;}
  .delay-2{animation-delay:0.2s;}
  .delay-3{animation-delay:0.3s;}

/* roulang page: article */
:root {
  --bg: #0A0F1E;
  --bg-soft: #0D1526;
  --bg-secondary: #111827;
  --primary: #22D3EE;
  --primary-glow: rgba(34,211,238,0.15);
  --success: #10B981;
  --success-glow: rgba(16,185,129,0.35);
  --accent: #F59E0B;
  --text-1: #F8FAFC;
  --text-2: #94A3B8;
  --text-3: #64748B;
  --border: rgba(255,255,255,0.08);
  --border-light: rgba(255,255,255,0.1);
  --radius-lg: 20px;
  --radius-md: 12px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.35), 0 0 20px rgba(34,211,238,0.08);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}
.container { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
a { color: inherit; text-decoration: none; transition: all .25s ease; }
img { display: block; max-width: 100%; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input { font-family: inherit; }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px rgba(34,211,238,0.2);
}

/* Header */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: rgba(10,15,30,0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  z-index: 100;
  transition: background .3s ease, box-shadow .3s ease;
}
.site-header.scrolled {
  background: rgba(10,15,30,0.9);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.header-container {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 72px;
}
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-icon {
  width: 40px; height: 40px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #22D3EE, #10B981);
  box-shadow: 0 4px 16px rgba(34,211,238,0.3);
  flex-shrink: 0;
}
.brand-text { font-size: 20px; font-weight: 800; letter-spacing: 0.02em; white-space: nowrap; }
.header-search { flex: 1; max-width: 440px; margin: 0 auto; }
.search-box {
  display: flex;
  align-items: center;
  height: 44px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 999px;
  padding: 0 18px;
  gap: 10px;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(34,211,238,0.15);
}
.search-box svg { color: var(--text-3); flex-shrink: 0; }
.search-box input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--text-1);
  font-size: 14px;
  height: 100%;
  min-width: 0;
}
.search-box input::placeholder { color: var(--text-3); }
.search-kbd {
  font-size: 11px;
  color: var(--text-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 8px;
  flex-shrink: 0;
  background: rgba(255,255,255,0.04);
}
.nav-links { display: flex; align-items: center; gap: 20px; flex-shrink: 0; }
.nav-link {
  position: relative;
  font-size: 15px;
  color: var(--text-2);
  font-weight: 500;
  padding: 6px 2px;
  white-space: nowrap;
  transition: color .2s ease;
}
.nav-link:hover { color: var(--text-1); }
.nav-link.active { color: var(--primary); }
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 100%; height: 2px;
  border-radius: 2px;
  background: var(--primary);
}
.btn-download {
  height: 36px;
  padding: 0 20px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  color: #0A0F1E;
  background: linear-gradient(135deg, #22D3EE, #10B981);
  box-shadow: 0 8px 24px rgba(16,185,129,0.35);
  transition: all .25s ease;
  flex-shrink: 0;
  white-space: nowrap;
}
.btn-download:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
  box-shadow: 0 12px 32px rgba(16,185,129,0.45);
}
.btn-download:active {
  transform: translateY(0);
  box-shadow: 0 8px 24px rgba(16,185,129,0.35);
}
.hamburger {
  display: none;
  width: 40px; height: 40px;
  border-radius: 10px;
  background: rgba(255,255,255,0.06);
  align-items: center;
  justify-content: center;
  color: var(--text-1);
  flex-shrink: 0;
  border: 1px solid rgba(255,255,255,0.1);
  transition: border-color .25s ease, background .25s ease;
}
.hamburger:hover { border-color: rgba(34,211,238,0.4); background: rgba(34,211,238,0.1); }
.mobile-menu { display: none; border-top: 1px solid rgba(255,255,255,0.06); padding: 16px 0 20px; background: rgba(10,15,30,0.95); }
.mobile-menu.open { display: block; }
.mobile-menu-inner { display: flex; flex-direction: column; gap: 16px; }
.mobile-search { width: 100%; max-width: none; }
.mobile-nav-links { display: flex; flex-direction: column; gap: 4px; }
.mobile-nav-links .nav-link { padding: 12px 8px; font-size: 15px; border-bottom: 1px solid rgba(255,255,255,0.04); }
.mobile-nav-links .nav-link:last-child { border-bottom: none; }
.mobile-nav-links .nav-link.active::after { display: none; }
.mobile-nav-links .nav-link.active { color: var(--primary); background: rgba(34,211,238,0.06); border-radius: 8px; }

/* Article Page */
.article-page { position: relative; padding-top: 72px; z-index: 1; }
.article-banner {
  position: relative;
  height: 340px;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
}
.article-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,15,30,0.6), #0A0F1E 96%);
}
.article-banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 25% 35%, rgba(34,211,238,0.12), transparent 70%);
  pointer-events: none;
}
.article-container {
  position: relative;
  margin-top: -220px;
  max-width: 880px;
  z-index: 2;
  padding-bottom: 0;
}
.article-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 24px;
  padding: 44px 48px 48px;
  box-shadow: var(--shadow-card);
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--text-2); transition: color .2s ease; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: rgba(255,255,255,0.2); }
.current-title {
  color: var(--text-2);
  max-width: 400px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.article-title {
  font-size: 36px;
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 28px;
}
.article-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--text-3); display: inline-block; }
.article-hero-img {
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  margin-bottom: 40px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
}
.article-hero-img img { width: 100%; height: 100%; object-fit: cover; }
.article-body { font-size: 16px; line-height: 1.85; color: #CBD5E1; }
.article-body p { margin-bottom: 24px; }
.article-body h2 {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin: 40px 0 16px;
  padding-left: 14px;
  position: relative;
  line-height: 1.4;
}
.article-body h2::before {
  content: '';
  position: absolute;
  left: 0; top: 6px;
  width: 4px; height: calc(100% - 12px);
  border-radius: 4px;
  background: var(--primary);
}
.article-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  margin: 28px 0 12px;
}
.article-body blockquote {
  border-left: 3px solid var(--primary);
  background: rgba(34,211,238,0.05);
  color: var(--text-2);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 24px 0;
  font-style: normal;
}
.article-body ul, .article-body ol { margin: 16px 0 24px; list-style: none; padding-left: 0; }
.article-body ul li { position: relative; padding-left: 20px; margin-bottom: 10px; }
.article-body ul li::before {
  content: '';
  position: absolute;
  left: 4px; top: 10px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--primary);
}
.article-body ol { counter-reset: article-ol; }
.article-body ol li {
  position: relative;
  padding-left: 32px;
  margin-bottom: 10px;
  counter-increment: article-ol;
}
.article-body ol li::before {
  content: counter(article-ol);
  position: absolute;
  left: 0; top: 2px;
  width: 20px; height: 20px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(34,211,238,0.1);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.article-body img { border-radius: 16px; margin: 24px 0 8px; }
.article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 4px; }
.article-body a:hover { color: var(--success); }
.article-divider { border: none; height: 1px; background: var(--border); margin: 40px 0; }
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 40px; }
.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  font-size: 13px;
  color: var(--text-2);
  background: rgba(255,255,255,0.06);
  border: 1px solid transparent;
  border-radius: 999px;
  transition: border-color .25s ease, color .25s ease;
}
.tag:hover { border-color: var(--primary); color: var(--text-1); }
.prev-next { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.pn-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  transition: all .25s ease;
}
.pn-card:hover {
  border-color: rgba(34,211,238,0.4);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.pn-card.next { text-align: right; flex-direction: row-reverse; }
.pn-info { flex: 1; min-width: 0; }
.pn-label { font-size: 12px; color: var(--text-3); display: block; margin-bottom: 4px; }
.pn-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pn-icon {
  width: 40px; height: 40px;
  flex-shrink: 0;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  transition: color .25s ease, background .25s ease;
}
.pn-card:hover .pn-icon { color: var(--primary); background: rgba(34,211,238,0.1); }

/* Empty State */
.article-empty {
  text-align: center;
  padding: 80px 40px;
}
.article-empty-icon {
  width: 120px; height: 120px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: var(--text-3);
}
.article-empty h2 {
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.article-empty p { color: var(--text-2); margin-bottom: 28px; max-width: 420px; margin-left: auto; margin-right: auto; }
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 32px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  color: #0A0F1E;
  background: linear-gradient(135deg, #22D3EE, #10B981);
  box-shadow: 0 8px 24px rgba(16,185,129,0.35);
  transition: all .25s ease;
}
.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
  box-shadow: 0 12px 32px rgba(16,185,129,0.45);
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 8px 24px rgba(16,185,129,0.35); }

/* Related */
.related-section { padding: 80px 0 40px; background: var(--bg-soft); margin-top: 80px; position: relative; }
.related-section .container { position: relative; z-index: 1; }
.related-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 32px; }
.related-header h2 { font-size: 28px; font-weight: 700; color: #fff; }
.related-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.related-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all .25s ease;
}
.related-card:hover {
  border-color: rgba(34,211,238,0.4);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.related-card-img { overflow: hidden; aspect-ratio: 16 / 9; background: var(--bg); }
.related-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.related-card:hover .related-card-img img { transform: scale(1.03); }
.related-card-info { padding: 16px 20px 20px; }
.related-card-info h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: #fff;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card-info time { font-size: 12px; color: var(--text-3); }

/* CTA */
.cta-section { padding: 80px 0; position: relative; background: var(--bg); margin-top: 40px; }
.cta-card {
  background: rgba(255,255,255,0.05);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 24px;
  padding: 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.cta-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(34,211,238,0.1), transparent 70%);
  pointer-events: none;
}
.cta-card h2 { font-size: 30px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cta-card p { color: var(--text-2); margin-bottom: 28px; font-size: 15px; }
.cta-buttons { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }
.cta-icon-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  transition: all .25s ease;
}
.cta-icon-btn:hover {
  border-color: rgba(34,211,238,0.5);
  transform: translateY(-2px);
  background: rgba(34,211,238,0.08);
}
.cta-icon-btn svg { color: var(--primary); flex-shrink: 0; }
.cta-btn-text { text-align: left; }
.cta-btn-text .cta-platform { display: block; font-size: 14px; font-weight: 600; color: #fff; }
.cta-btn-text .cta-sub { font-size: 11px; color: var(--text-3); }

/* Footer */
.site-footer {
  background: #0A0F1E;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 60px 0 0;
  position: relative;
  z-index: 1;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .brand { margin-bottom: 16px; }
.footer-desc { font-size: 14px; color: var(--text-3); line-height: 1.7; max-width: 300px; }
.footer-title { font-size: 15px; font-weight: 600; color: var(--text-1); margin-bottom: 16px; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; padding: 0; }
.footer-links a { font-size: 14px; color: var(--text-2); transition: color .2s ease; }
.footer-links a:hover { color: var(--primary); }
.footer-contact { display: flex; flex-direction: column; gap: 12px; font-size: 14px; color: var(--text-2); }
.footer-social { display: flex; gap: 10px; }
.social-btn {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  transition: all .25s ease;
  border: 1px solid transparent;
}
.social-btn:hover { background: rgba(34,211,238,0.15); color: var(--primary); border-color: rgba(34,211,238,0.3); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0;
  display: flex;
  justify-content: center;
  gap: 16px;
  font-size: 12px;
  color: var(--text-3);
  flex-wrap: wrap;
}

/* Keyframes */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.article-card, .article-empty { animation: fadeUp .6s ease both; }

/* Responsive */
@media (max-width: 1024px) {
  .header-container { gap: 16px; }
  .nav-links { gap: 14px; }
  .btn-download { padding: 0 16px; }
}
@media (max-width: 768px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .header-container { height: 72px; gap: 12px; }
  .header-search { display: none; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .article-page { padding-top: 72px; }
  .article-banner { height: 260px; }
  .article-container { margin-top: -180px; }
  .article-card { padding: 28px 24px 32px; border-radius: 20px; }
  .article-title { font-size: 28px; }
  .prev-next { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .cta-card { padding: 32px 24px; }
  .cta-buttons { flex-direction: column; align-items: center; }
  .cta-icon-btn { width: 100%; justify-content: center; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 520px) {
  .header-container { gap: 10px; }
  .brand-text { font-size: 17px; }
  .brand-icon { width: 36px; height: 36px; }
  .btn-download { padding: 0 14px; font-size: 13px; gap: 6px; }
  .hamburger { width: 36px; height: 36px; }
  .article-title { font-size: 24px; }
  .article-meta { font-size: 13px; gap: 8px; }
  .article-card { padding: 24px 18px 28px; }
  .article-body { font-size: 15px; }
  .article-body h2 { font-size: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; padding-bottom: 32px; }
  .related-card-info h3 { font-size: 15px; }
  .cta-card h2 { font-size: 24px; }
}