/* roulang page: index */
:root {
  --primary: #0b1f3a;
  --primary-soft: #16345c;
  --accent: #0ea5e9;
  --accent-2: #06b6d4;
  --hot: #f59e0b;
  --bg: #f4f7fb;
  --surface: #ffffff;
  --text: #17233d;
  --text-weak: #5b6b83;
  --border: #e3e9f2;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 8px 30px rgba(11,31,58,0.08);
  --shadow-hover: 0 16px 44px rgba(11,31,58,0.14);
  --sidebar-w: 248px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }

.container { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
section { padding: 80px 0; }
@media (max-width: 767px) { section { padding: 56px 0; } }

h1,h2,h3,h4 { line-height: 1.3; }
p { line-height: 1.75; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ===== App Shell ===== */
.app-shell { display: flex; min-height: 100vh; }

.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: linear-gradient(180deg, #0d2340 0%, #07182d 100%);
  color: #fff;
  display: flex;
  flex-direction: column;
  padding: 30px 20px 22px;
  z-index: 60;
  border-right: 1px solid rgba(255,255,255,0.06);
  transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
  overflow-y: auto;
}
.sidebar.open {
  transform: translateX(0);
  box-shadow: 0 0 60px rgba(0,0,0,0.35);
}

.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 4px 4px 22px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  color: #fff;
}
.brand-icon {
  width: 42px; height: 42px;
  border-radius: 13px;
  background: linear-gradient(135deg, rgba(14,165,233,0.35), rgba(6,182,212,0.2));
  border: 1px solid rgba(14,165,233,0.35);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; color: #7dd3fc;
  flex-shrink: 0;
}
.brand-text { font-size: 17px; font-weight: 800; line-height: 1.3; }
.brand-sub { display: block; font-size: 11px; font-weight: 400; color: rgba(255,255,255,0.5); letter-spacing: 0.5px; margin-top: 2px; }

.side-nav { margin-top: 26px; display: flex; flex-direction: column; gap: 8px; }
.side-nav .nav-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px;
  border-radius: 12px;
  color: rgba(255,255,255,0.72);
  font-size: 15px; font-weight: 500;
  transition: all 0.25s ease;
  border: 1px solid transparent;
}
.side-nav .nav-item i { width: 20px; text-align: center; font-size: 16px; }
.side-nav .nav-item:hover { background: rgba(255,255,255,0.08); color: #fff; transform: translateX(3px); }
.side-nav .nav-item.active {
  background: linear-gradient(135deg, rgba(14,165,233,0.22), rgba(6,182,212,0.12));
  border-color: rgba(14,165,233,0.35);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 18px rgba(14,165,233,0.14);
}

.side-foot {
  margin-top: auto;
  padding: 18px 10px 4px;
  border-top: 1px solid rgba(255,255,255,0.07);
}
.side-foot p { font-size: 12px; color: rgba(255,255,255,0.42); line-height: 1.7; }
.side-foot .foot-tag {
  display: inline-block;
  background: rgba(14,165,233,0.14);
  border: 1px solid rgba(14,165,233,0.25);
  color: #7dd3fc;
  font-size: 11px;
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: 8px;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.52);
  z-index: 55;
  backdrop-filter: blur(2px);
}
.sidebar-overlay.show { display: block; }

.mobile-topbar {
  display: none;
  position: sticky; top: 0;
  z-index: 50;
  align-items: center;
  gap: 14px;
  background: rgba(8,20,38,0.92);
  backdrop-filter: blur(12px);
  padding: 12px 18px;
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.mobile-topbar .menu-btn {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 10px;
  color: #fff; font-size: 16px;
  transition: background 0.2s;
}
.mobile-topbar .menu-btn:hover { background: rgba(255,255,255,0.18); }
.mobile-brand { font-size: 16px; font-weight: 800; color: #fff; display: flex; align-items: center; gap: 8px; }
.mobile-brand i { color: #7dd3fc; }

@media (max-width: 1023.98px) {
  .sidebar { transform: translateX(-105%); }
  .main-content { margin-left: 0; }
  .mobile-topbar { display: flex; }
}
@media (min-width: 1024px) {
  .sidebar-overlay { display: none !important; }
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 13px 26px;
  border-radius: 12px;
  font-size: 15px; font-weight: 600;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  line-height: 1.4;
}
.btn i { font-size: 15px; }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 8px 24px rgba(14,165,233,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(14,165,233,0.42); }
.btn-outline {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.35);
  color: #fff;
  backdrop-filter: blur(6px);
}
.btn-outline:hover { background: rgba(255,255,255,0.18); transform: translateY(-2px); }
.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  color: #fff;
  font-size: 13px;
  padding: 8px 18px;
  border-radius: 10px;
}
.btn-ghost:hover { background: rgba(255,255,255,0.12); }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(0,0,0,0.18); }
.btn-outline-light { border-color: rgba(255,255,255,0.5); color: #fff; }
.btn-outline-light:hover { background: rgba(255,255,255,0.15); transform: translateY(-2px); }

/* ===== Hero ===== */
.hero-section {
  position: relative;
  overflow: hidden;
  min-height: 700px;
  display: flex;
  align-items: center;
  color: #fff;
  padding: 80px 0;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(105deg, rgba(7,20,38,0.95) 0%, rgba(11,31,58,0.82) 45%, rgba(13,42,72,0.56) 100%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 60px;
  align-items: center;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.18);
  backdrop-filter: blur(8px);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  color: #fcd47a;
  margin-bottom: 22px;
}
.hero-tag i { color: var(--hot); }
.hero-title { font-size: clamp(34px, 5vw, 54px); font-weight: 800; line-height: 1.12; letter-spacing: 1px; }
.hero-subtitle {
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 600;
  color: #67e8f9;
  margin-top: 12px;
}
.hero-desc { font-size: 16px; color: rgba(255,255,255,0.82); max-width: 560px; margin-top: 20px; }
.hero-actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 14px; }
.hero-trust { margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.14); display: flex; flex-wrap: wrap; gap: 10px; }
.hero-trust span {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; color: rgba(255,255,255,0.8);
  background: rgba(255,255,255,0.08);
  border-radius: 8px; padding: 6px 12px;
}
.hero-trust i { color: #67e8f9; }

.hero-card-wrap { display: flex; justify-content: flex-end; }
.hero-card {
  background: rgba(255,255,255,0.1);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 24px;
  overflow: hidden;
  max-width: 370px;
  width: 100%;
  box-shadow: 0 24px 70px rgba(0,0,0,0.28);
}
.hero-card-top { display: flex; gap: 8px; padding: 16px 16px 0; }
.hero-card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; margin-top: 12px; }
.hero-card-body { padding: 18px 20px 22px; }
.hero-card-body h3 { font-size: 18px; font-weight: 700; color: #fff; }
.hero-card-body > p { font-size: 13px; color: rgba(255,255,255,0.75); margin: 6px 0 14px; }
.progress-wrap { display: flex; align-items: center; gap: 10px; font-size: 12px; color: rgba(255,255,255,0.7); margin-bottom: 16px; }
.progress-track { flex: 1; height: 6px; background: rgba(255,255,255,0.15); border-radius: 99px; overflow: hidden; }
.progress-fill { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); border-radius: 99px; }

@media (max-width: 991.98px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-card-wrap { justify-content: flex-start; }
  .hero-card { max-width: 420px; }
}

/* ===== Badges ===== */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px; font-weight: 600;
  padding: 4px 11px;
  border-radius: 999px;
  line-height: 1.4;
}
.product-hot { background: rgba(245,158,11,0.15); color: #fbbf24; border: 1px solid rgba(245,158,11,0.28); }
.product-new { background: rgba(14,165,233,0.15); color: #7dd3fc; border: 1px solid rgba(14,165,233,0.3); }
.badge-light { background: rgba(255,255,255,0.14); color: #fff; border: 1px solid rgba(255,255,255,0.2); }

/* ===== Section Head ===== */
.section-head { text-align: center; max-width: 660px; margin: 0 auto 50px; }
.section-eyebrow {
  display: inline-block;
  font-size: 12px; font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(14,165,233,0.1);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 800; }
.section-head p { color: var(--text-weak); margin-top: 12px; font-size: 15px; }

/* ===== Stats ===== */
.stats-section { padding: 0; position: relative; z-index: 5; margin-top: -46px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.stat-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.stat-num { font-size: 30px; font-weight: 800; color: var(--primary); line-height: 1.2; }
.stat-label { font-size: 13px; color: var(--text-weak); margin-top: 6px; }
@media (max-width: 767px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stats-section { margin-top: -30px; }
}

/* ===== Features ===== */
.features-section { background: var(--surface); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card {
  background: var(--surface);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  height: 100%;
  display: flex; flex-direction: column;
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.feature-card .feature-img {
  aspect-ratio: 16/9;
  object-fit: cover;
  width: 100%;
  transition: transform 0.4s ease;
}
.feature-card:hover .feature-img { transform: scale(1.04); }
.feature-body { padding: 26px 24px 28px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.feature-icon {
  width: 48px; height: 48px;
  border-radius: 14px;
  background: rgba(14,165,233,0.1);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}
.feature-body h3 { font-size: 20px; font-weight: 700; }
.feature-body p { font-size: 14px; color: var(--text-weak); flex: 1; }
.text-link { color: var(--accent); font-weight: 600; font-size: 14px; display: inline-flex; align-items: center; gap: 6px; }
.text-link i { transition: transform 0.25s; }
.text-link:hover i { transform: translateX(4px); }
@media (max-width: 991.98px) { .feature-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 639px) { .feature-grid { grid-template-columns: 1fr; } }

/* ===== Process ===== */
.process-section { background: linear-gradient(180deg, #10294a 0%, #081a30 100%); color: #fff; }
.process-section .section-head p { color: rgba(255,255,255,0.6); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 20px;
  padding: 28px 24px;
  transition: all 0.3s ease;
  overflow: hidden;
}
.step-card:hover {
  transform: translateY(-6px);
  background: rgba(255,255,255,0.09);
  border-color: rgba(14,165,233,0.4);
}
.step-num {
  font-size: 48px; font-weight: 800; line-height: 1;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.step-card h3 { font-size: 18px; font-weight: 700; margin-top: 14px; color: #fff; }
.step-card p { font-size: 13.5px; color: rgba(255,255,255,0.68); margin-top: 8px; }
.step-progress { height: 6px; background: rgba(255,255,255,0.12); border-radius: 99px; margin-top: 20px; overflow: hidden; }
.step-fill { height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
@media (max-width: 991.98px) { .process-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 639px) { .process-grid { grid-template-columns: 1fr; } }

/* ===== Products ===== */
.products-section { background: var(--bg); }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product-card {
  background: var(--surface);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  display: block;
}
.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(14,165,233,0.35);
}
.product-cover { position: relative; overflow: hidden; }
.product-cover img { aspect-ratio: 4/5; object-fit: cover; width: 100%; transition: transform 0.4s ease; }
.product-card:hover .product-cover img { transform: scale(1.05); }
.product-cover .badge { position: absolute; top: 14px; left: 14px; z-index: 2; }
.product-body { padding: 20px 22px 22px; }
.product-body h3 { font-size: 17px; font-weight: 700; }
.product-body p { font-size: 13px; color: var(--text-weak); margin: 8px 0 14px; }
.meta-row { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: var(--text-weak); }
.meta-row .arrow {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: rgba(14,165,233,0.1);
  color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  transition: all 0.25s;
}
.product-card:hover .meta-row .arrow { background: var(--accent); color: #fff; }
@media (max-width: 991.98px) { .product-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 639px) { .product-grid { grid-template-columns: 1fr; } }

/* ===== News ===== */
.news-section { background: var(--surface); }
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 24px;
  transition: all 0.25s ease;
  display: flex; flex-direction: column; gap: 10px;
}
.news-item:hover {
  border-color: rgba(14,165,233,0.35);
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}
.news-item-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.news-badge {
  background: rgba(14,165,233,0.1);
  color: var(--accent);
  font-size: 12px; font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  white-space: nowrap;
}
.news-date { font-size: 13px; color: var(--text-weak); display: inline-flex; align-items: center; gap: 5px; }
.news-title { font-size: 18px; font-weight: 700; line-height: 1.4; }
.news-title a { transition: color 0.2s; }
.news-title a:hover { color: var(--accent); }
.news-desc {
  font-size: 14px; color: var(--text-weak);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 20px;
  color: var(--text-weak);
  background: var(--bg);
  border-radius: 18px;
  font-size: 15px;
}
@media (max-width: 767px) { .news-grid { grid-template-columns: 1fr; } }

/* ===== Calendar ===== */
.calendar-section { background: var(--bg); }
.calendar-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.calendar-item {
  display: flex; gap: 18px; align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px 20px;
  transition: all 0.25s ease;
}
.calendar-item:hover {
  border-color: rgba(14,165,233,0.35);
  box-shadow: var(--shadow);
  transform: translateX(6px);
}
.calendar-date {
  width: 56px; min-width: 56px;
  text-align: center;
  background: var(--primary);
  color: #fff;
  border-radius: 12px;
  padding: 10px 0;
}
.calendar-date .day { display: block; font-size: 22px; font-weight: 800; line-height: 1.1; }
.calendar-date .month { font-size: 11px; color: rgba(255,255,255,0.7); }
.calendar-content { flex: 1; }
.calendar-content h3 { font-size: 16px; font-weight: 700; }
.calendar-content p { font-size: 13px; color: var(--text-weak); margin-top: 4px; }
.tag { display: inline-block; font-size: 12px; padding: 3px 10px; border-radius: 999px; margin-bottom: 6px; font-weight: 600; }
.tag-blue { background: rgba(14,165,233,0.1); color: var(--accent); }
.tag-purple { background: rgba(139,92,246,0.1); color: #8b5cf6; }
.tag-green { background: rgba(16,185,129,0.1); color: #10b981; }
.tag-orange { background: rgba(245,158,11,0.12); color: #d97706; }

/* ===== FAQ ===== */
.faq-section { background: var(--surface); }
.faq-wrap { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 56px; align-items: start; }
.faq-intro { position: sticky; top: 40px; }
.faq-intro .section-eyebrow { margin-bottom: 12px; }
.faq-intro h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 800; }
.faq-intro p { color: var(--text-weak); margin-top: 14px; font-size: 15px; }
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.25s;
}
.faq-item.active { border-color: rgba(14,165,233,0.4); }
.faq-question {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 18px 20px;
  background: none; border: none;
  font-size: 15px; font-weight: 600;
  color: var(--text);
  text-align: left;
}
.faq-question i { transition: transform 0.3s; color: var(--text-weak); font-size: 14px; }
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--accent); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  font-size: 14px;
  color: var(--text-weak);
  padding: 0 20px;
}
.faq-item.active .faq-answer { max-height: 320px; padding: 0 20px 18px; }
@media (max-width: 991.98px) { .faq-wrap { grid-template-columns: 1fr; gap: 32px; } .faq-intro { position: static; } }

/* ===== CTA ===== */
.cta-section {
  background: var(--primary);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute; inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.22;
}
.cta-section::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at center, rgba(14,165,233,0.16) 0%, transparent 65%);
}
.cta-inner {
  position: relative; z-index: 2;
  text-align: center;
  color: #fff;
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 0;
}
.cta-inner h2 { font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; line-height: 1.25; }
.cta-inner p { color: rgba(255,255,255,0.82); margin-top: 14px; font-size: 16px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; margin-top: 30px; flex-wrap: wrap; }
.cta-meta { margin-top: 26px; font-size: 13px; color: rgba(255,255,255,0.55); display: flex; justify-content: center; gap: 20px; flex-wrap: wrap; }
.cta-meta i { color: #67e8f9; margin-right: 4px; }

/* ===== Footer ===== */
.site-footer { background: #061524; color: rgba(255,255,255,0.68); padding-top: 60px; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .footer-logo {
  font-size: 20px; font-weight: 800;
  color: #fff;
  display: flex; align-items: center; gap: 10px;
}
.footer-brand .footer-logo i { color: var(--accent-2); font-size: 24px; }
.footer-brand p { font-size: 14px; margin-top: 14px; line-height: 1.7; color: rgba(255,255,255,0.56); }
.site-footer h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 16px; }
.site-footer ul { list-style: none; }
.site-footer ul li { margin-bottom: 6px; }
.site-footer a.link {
  display: inline-block;
  font-size: 14px;
  padding: 4px 0;
  color: rgba(255,255,255,0.6);
  transition: color 0.2s, transform 0.2s;
}
.site-footer a.link:hover { color: var(--accent-2); transform: translateX(3px); }
.footer-contact { font-size: 14px; line-height: 2; color: rgba(255,255,255,0.6); }
.footer-contact i { color: var(--accent-2); width: 18px; margin-right: 4px; }
.footer-bottom {
  text-align: center;
  padding: 22px 0;
  font-size: 13px;
  color: rgba(255,255,255,0.38);
  border-top: 1px solid rgba(255,255,255,0.06);
}
@media (max-width: 991.98px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 639px) { .footer-grid { grid-template-columns: 1fr; gap: 28px; } }

/* roulang page: category1 */
:root{
    --brand:#2563eb; --brand-dark:#1e40af; --brand-light:#dbeafe;
    --accent:#f59e0b; --accent-dark:#b45309; --accent-light:#fef3c7;
    --bg:#f6f8fb; --surface:#ffffff; --text:#111827; --muted:#6b7280;
    --border:#e5e7eb; --radius:1rem; --shadow:0 1px 3px rgba(0,0,0,.06),0 8px 24px rgba(0,0,0,.06);
  }
  *{box-sizing:border-box;margin:0;padding:0}
  html{scroll-behavior:smooth}
  body{font-family:system-ui,-apple-system,'Segoe UI',Roboto,'PingFang SC','Microsoft YaHei',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
  a{text-decoration:none;color:inherit}
  img{max-width:100%;display:block}
  button,input,select,textarea{font:inherit;outline:none}
  .focus-ring:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
  
  .app-shell{display:flex;min-height:100vh}
  .side-nav{width:240px;position:fixed;inset:0 auto 0 0;background:#0f172a;display:flex;flex-direction:column;padding:28px 16px;z-index:50;overflow-y:auto;transition:transform .3s ease}
  .side-nav .logo{display:flex;align-items:center;gap:12px;padding:10px 14px;margin-bottom:28px;border-radius:12px;background:rgba(255,255,255,.04);color:#fff}
  .side-nav .logo i{font-size:22px;color:#60a5fa}
  .side-nav .logo span{font-size:17px;font-weight:700;letter-spacing:.3px;white-space:nowrap}
  .nav-list{list-style:none;display:flex;flex-direction:column;gap:6px;flex:1}
  .nav-list a{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:10px;color:#94a3b8;font-size:15px;font-weight:500;transition:all .25s;border:1px solid transparent}
  .nav-list a i{width:20px;text-align:center;font-size:16px}
  .nav-list a:hover{background:rgba(255,255,255,.06);color:#e2e8f0}
  .nav-list a.active{background:rgba(37,99,235,.2);color:#60a5fa;border-color:rgba(96,165,250,.3)}
  .main-content{flex:1;margin-left:240px;min-width:0}
  
  .page-banner{position:relative;padding:72px 40px 60px;background:linear-gradient(135deg,#0f172a 0%,#1e293b 60%,#1e3a8a 100%);overflow:hidden}
  .page-banner .bg-img{position:absolute;inset:0;background-image:url('/assets/images/backpic/back-1.png');background-size:cover;background-position:center;opacity:.28}
  .page-banner::after{content:'';position:absolute;inset:0;background:linear-gradient(180deg,rgba(15,23,42,.3) 0%,rgba(15,23,42,.55) 100%)}
  .page-banner .container{position:relative;z-index:2;max-width:1200px;margin:0 auto}
  .page-banner .crumb{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#94a3b8;background:rgba(255,255,255,.08);padding:6px 14px;border-radius:999px;margin-bottom:20px;backdrop-filter:blur(4px)}
  .page-banner h1{font-size:42px;font-weight:800;color:#fff;line-height:1.2;letter-spacing:.5px}
  .page-banner .sub{color:#cbd5e1;font-size:17px;margin-top:14px;max-width:720px;line-height:1.7}
  .page-banner .badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
  
  .topic-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(245,158,11,.15);color:#fcd34d;border:1px solid rgba(245,158,11,.3);padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600}
  
  .category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:24px}
  .product-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--border);transition:transform .3s ease,box-shadow .3s ease}
  .product-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(0,0,0,.1)}
  .product-card .thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#f1f5f9}
  .product-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
  .product-card:hover .thumb img{transform:scale(1.04)}
  .product-card .hot-tag{position:absolute;top:14px;left:14px;background:linear-gradient(135deg,#ef4444,#f97316);color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:999px;box-shadow:0 4px 10px rgba(239,68,68,.4)}
  .product-card .new-tag{position:absolute;top:14px;right:14px;background:rgba(37,99,235,.9);color:#fff;font-size:12px;font-weight:600;padding:4px 12px;border-radius:999px;backdrop-filter:blur(4px)}
  .product-card .card-body{padding:22px 22px 10px}
  .product-card .card-title{font-size:18px;font-weight:700;color:#111827;margin-bottom:8px;line-height:1.4}
  .product-card .card-desc{font-size:14px;color:#6b7280;line-height:1.7;margin-bottom:16px}
  .product-card .tag-row{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
  .product-card .tag{display:inline-flex;align-items:center;gap:4px;background:#f1f5f9;color:#334155;font-size:12px;padding:3px 10px;border-radius:999px;font-weight:500}
  .product-card .card-foot{padding:14px 22px;border-top:1px solid #f1f5f9;display:flex;align-items:center;justify-content:space-between}
  .product-card .status{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:#16a34a}
  .status-dot{width:7px;height:7px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 4px rgba(34,197,94,.15)}
  .btn-more{font-size:13px;color:var(--brand);font-weight:600;display:inline-flex;align-items:center;gap:6px}
  .btn-more:hover{color:var(--brand-dark)}
  
  .stat-block{background:linear-gradient(135deg,#eff6ff,#f0f9ff);border:1px solid #bfdbfe;border-radius:16px;padding:24px;text-align:center}
  .stat-block .num{font-size:34px;font-weight:800;color:var(--brand);line-height:1.2}
  .stat-block .label{font-size:14px;color:#475569;margin-top:4px;font-weight:500}
  
  .timeline{position:relative;padding-left:28px}
  .timeline::before{content:'';position:absolute;left:8px;top:4px;bottom:4px;width:2px;background:linear-gradient(180deg,#2563eb,#93c5fd,#e2e8f0)}
  .timeline-item{position:relative;padding:6px 0 24px}
  .timeline-item::before{content:'';position:absolute;left:-24px;top:14px;width:12px;height:12px;border-radius:50%;background:#fff;border:3px solid var(--brand);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
  
  .faq-item{background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px 24px;transition:box-shadow .25s}
  .faq-item:hover{box-shadow:var(--shadow)}
  .faq-item h3{font-size:16px;font-weight:700;color:#111827;margin-bottom:8px;display:flex;align-items:center;gap:10px}
  .faq-item h3 i{color:var(--brand)}
  .faq-item p{font-size:14px;color:#6b7280;line-height:1.75}
  
  .cta-section{background:linear-gradient(120deg,#1e3a8a,#2563eb);border-radius:24px;padding:48px 50px;position:relative;overflow:hidden}
  .cta-section::before{content:'';position:absolute;right:-40px;top:-40px;width:220px;height:220px;border-radius:50%;background:rgba(255,255,255,.06)}
  .cta-section::after{content:'';position:absolute;right:60px;bottom:-60px;width:140px;height:140px;border-radius:50%;background:rgba(255,255,255,.04)}
  
  .site-footer{background:#0f172a;color:#94a3b8;padding:52px 0 0;margin-top:60px}
  .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:36px}
  .footer-brand .footer-logo{display:inline-flex;align-items:center;gap:10px;color:#f1f5f9;font-size:18px;font-weight:700;margin-bottom:14px}
  .footer-brand .footer-logo i{color:#60a5fa}
  .footer-brand p{font-size:14px;line-height:1.8;margin-top:8px}
  .site-footer h4{font-size:15px;font-weight:700;color:#e2e8f0;margin-bottom:16px;letter-spacing:.5px}
  .site-footer ul{list-style:none}
  .site-footer ul li{margin-bottom:10px}
  .site-footer ul a{font-size:14px;color:#94a3b8;transition:color .2s}
  .site-footer ul a:hover{color:#60a5fa}
  .footer-contact p{font-size:14px;margin-bottom:10px;display:flex;align-items:center;gap:8px}
  .footer-contact i{color:#60a5fa;width:16px}
  .footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:20px 0;text-align:center;font-size:13px;color:#64748b}
  
  .mobile-top{display:none}
  .m-overlay{display:none}
  
  @media (max-width:1024px){
    .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
    .page-banner{padding:56px 24px 48px}
    .page-banner h1{font-size:34px}
  }
  @media (max-width:768px){
    .app-shell{display:block}
    .side-nav{transform:translateX(-100%);width:280px;box-shadow:4px 0 24px rgba(0,0,0,.2)}
    .side-nav.open{transform:translateX(0)}
    .mobile-top{display:flex;position:sticky;top:0;z-index:45;background:rgba(15,23,42,.95);backdrop-filter:blur(8px);align-items:center;justify-content:space-between;padding:14px 20px}
    .mobile-top .logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:700}
    .mobile-top .logo i{color:#60a5fa}
    .m-menu-btn{background:transparent;border:1px solid rgba(255,255,255,.2);color:#e2e8f0;width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px;cursor:pointer}
    .m-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:40}
    .m-overlay.active{display:block}
    .main-content{margin-left:0}
    .page-banner{padding:44px 20px 40px}
    .page-banner h1{font-size:28px}
    .page-banner .sub{font-size:15px}
    .category-grid{grid-template-columns:1fr}
    .cta-section{padding:36px 24px}
    .cta-section h2{font-size:22px!important}
    .footer-grid{grid-template-columns:1fr;gap:28px}
  }
  @media (max-width:520px){
    .category-grid{grid-template-columns:1fr}
    .stat-block{padding:18px}
    .stat-block .num{font-size:26px}
    .page-banner .crumb{font-size:12px}
    .page-banner h1{font-size:24px}
  }

/* roulang page: article */
:root {
  --primary: #0B2545;
  --primary-rgb: 11, 37, 69;
  --primary-light: #1D3A5F;
  --accent: #02C39A;
  --accent-dark: #028D73;
  --hot: #FF6B35;
  --bg: #F4F6F9;
  --card: #FFFFFF;
  --text: #1B2A41;
  --text-muted: #64748B;
  --border: #E2E8F0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --sidebar-width: 252px;
  --shadow-xs: 0 1px 2px rgba(11, 37, 69, .06);
  --shadow-sm: 0 2px 10px rgba(11, 37, 69, .08);
  --shadow-md: 0 8px 30px rgba(11, 37, 69, .12);
  --shadow-lg: 0 24px 60px rgba(11, 37, 69, .18);
  --transition: all .3s cubic-bezier(.4, 0, .2, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
}
button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}
ul, ol {
  list-style: none;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ===== Reading Progress ===== */
.reading-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: transparent;
  z-index: 9999;
}
.reading-bar-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent), var(--hot));
  transition: width .1s ease-out;
}

/* ===== App Shell ===== */
.app-shell {
  display: flex;
  min-height: 100vh;
}
.side-shell {
  width: var(--sidebar-width);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  background: linear-gradient(180deg, #0B2545 0%, #0F2D52 60%, #123455 100%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  z-index: 60;
  padding: 28px 0 20px;
  overflow-y: auto;
  scrollbar-width: thin;
}
.side-shell::-webkit-scrollbar {
  width: 4px;
}
.side-shell::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,.2);
  border-radius: 4px;
}
.side-inner {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.side-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 22px 28px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  margin-bottom: 20px;
}
.logo-badge {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 19px;
  color: #fff;
  box-shadow: 0 4px 16px rgba(2, 195, 154, .35);
}
.logo-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}
.logo-copy strong {
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .5px;
}
.logo-copy small {
  color: rgba(255,255,255,.6);
  font-size: 12px;
  letter-spacing: 2px;
  margin-top: 2px;
}
.side-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0 14px;
  flex: 1;
}
.side-nav .nav-label {
  color: rgba(255,255,255,.4);
  font-size: 11px;
  letter-spacing: 2px;
  padding: 12px 12px 6px;
  text-transform: uppercase;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 12px;
  color: rgba(255,255,255,.65);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
}
.nav-item i {
  width: 20px;
  text-align: center;
  font-size: 16px;
}
.nav-item:hover {
  background: rgba(255,255,255,.07);
  color: #fff;
  transform: translateX(2px);
}
.nav-item.active {
  background: rgba(2, 195, 154, .18);
  color: #fff;
  box-shadow: inset 0 0 0 1px rgba(2, 195, 154, .3);
  font-weight: 600;
}
.nav-item.active i {
  color: var(--accent);
}
.side-bottom {
  padding: 20px 18px 0;
  border-top: 1px solid rgba(255,255,255,.08);
  margin-top: 16px;
}
.side-cta-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 11px 16px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 18px rgba(2, 195, 154, .3);
}
.side-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(2, 195, 154, .4);
}
.side-tip {
  margin-top: 12px;
  text-align: center;
  color: rgba(255,255,255,.35);
  font-size: 11px;
  line-height: 1.5;
}
.menu-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(11, 37, 69, .55);
  backdrop-filter: blur(2px);
  z-index: 55;
}
.main-wrap {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-width: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== Mobile Header ===== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 50;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  padding: 0 16px;
  background: var(--primary);
  box-shadow: 0 2px 16px rgba(11, 37, 69, .25);
}
.mobile-header .menu-toggle {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 17px;
  transition: var(--transition);
}
.mobile-header .menu-toggle:hover,
.mobile-header .menu-toggle:focus {
  background: rgba(255,255,255,.12);
}
.mobile-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff;
  font-size: 16px;
  font-weight: 700;
}
.mobile-logo i {
  color: var(--accent);
  font-size: 18px;
}
.mobile-action {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  background: rgba(2, 195, 154, .2);
  transition: var(--transition);
}
.mobile-action:hover {
  background: rgba(2, 195, 154, .35);
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 80px 0 64px;
  color: #fff;
  overflow: hidden;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11, 37, 69, .96) 0%, rgba(11, 37, 69, .88) 55%, rgba(2, 195, 154, .55) 100%);
}
.hero-inner {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.55);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: rgba(255,255,255,.75);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.breadcrumb a:hover {
  color: #fff;
}
.breadcrumb .fa-chevron-right {
  font-size: 9px;
  opacity: .6;
}
.breadcrumb span {
  color: rgba(255,255,255,.5);
}
.article-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(2, 195, 154, .2);
  border: 1px solid rgba(2, 195, 154, .4);
  color: var(--accent);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 18px;
}
.hero-title {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
  font-weight: 800;
  max-width: 760px;
  text-shadow: 0 2px 20px rgba(0,0,0,.2);
  margin-bottom: 22px;
}
.hero-meta {
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: rgba(255,255,255,.65);
  background: rgba(255,255,255,.08);
  padding: 5px 12px;
  border-radius: 999px;
  line-height: 1.4;
}
.meta-item.hot {
  color: #FFB37C;
  background: rgba(255, 107, 53, .18);
  border: 1px solid rgba(255, 107, 53, .3);
}

/* ===== Article Section ===== */
.article-section {
  padding: 48px 0 60px;
  position: relative;
  z-index: 1;
}
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 32px;
  align-items: start;
}
.article-main {
  min-width: 0;
}
.article-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(226, 232, 240, .7);
  overflow: hidden;
}
.article-content {
  padding: 40px 44px;
  font-size: 16px;
  line-height: 1.9;
  color: #2D3A4A;
  word-wrap: break-word;
}
.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin: 36px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--accent);
  line-height: 1.4;
}
.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  margin: 30px 0 12px;
  line-height: 1.5;
}
.article-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  margin: 24px 0 10px;
}
.article-content p {
  margin: 16px 0;
}
.article-content a {
  color: var(--accent-dark);
  border-bottom: 1px solid rgba(2, 141, 115, .3);
  transition: var(--transition);
}
.article-content a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.article-content img {
  border-radius: var(--radius);
  margin: 24px 0;
  max-width: 100%;
  height: auto;
  box-shadow: var(--shadow-md);
}
.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: rgba(2, 195, 154, .08);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 24px 0;
  color: var(--text-muted);
  font-style: italic;
}
.article-content ul,
.article-content ol {
  padding-left: 24px;
  margin: 16px 0;
}
.article-content ul li {
  list-style: disc;
  margin: 8px 0;
}
.article-content ol li {
  list-style: decimal;
  margin: 8px 0;
}
.article-content code {
  background: #F1F5F9;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--primary);
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}
.article-content pre {
  background: #0F172A;
  color: #E2E8F0;
  padding: 20px;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 24px 0;
  font-size: 14px;
  line-height: 1.7;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
}
.article-content th {
  background: var(--primary);
  color: #fff;
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
}
.article-content td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}
.article-content iframe {
  max-width: 100%;
  border-radius: var(--radius-sm);
}
.article-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 20px 44px 24px;
  border-top: 1px solid rgba(226, 232, 240, .7);
  background: #FAFBFD;
}
.tag-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.tag-label {
  color: var(--text-muted);
  font-size: 13px;
}
.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(2, 195, 154, .08);
  border: 1px solid rgba(2, 195, 154, .2);
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 500;
  transition: var(--transition);
  cursor: default;
}
.tag-chip:hover {
  background: rgba(2, 195, 154, .15);
  border-color: var(--accent);
}
.share-row {
  display: flex;
  align-items: center;
  gap: 8px;
}
.share-label {
  color: var(--text-muted);
  font-size: 13px;
}
.share-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: #fff;
  transition: var(--transition);
}
.share-btn.wx { background: #07C160; }
.share-btn.wb { background: #E6162D; }
.share-btn.qq { background: #12B7F5; }
.share-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(0,0,0,.2);
}

/* ===== Not Found ===== */
.not-found-panel {
  text-align: center;
  padding: 60px 30px;
}
.not-found-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(2,195,154,.15), rgba(2,195,154,.05));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  color: var(--accent);
}
.not-found-panel h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}
.not-found-panel p {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 28px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 6px 20px rgba(2, 195, 154, .3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(2, 195, 154, .4);
}
.btn-primary:focus-visible,
.btn-light:focus-visible,
.btn-primary-lg:focus-visible,
.btn-outline-light:focus-visible {
  outline: 3px solid rgba(2, 195, 154, .5);
  outline-offset: 2px;
}

/* ===== Sidebar ===== */
.article-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
  position: sticky;
  top: 24px;
}
.side-card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid rgba(226, 232, 240, .7);
  box-shadow: var(--shadow-sm);
  padding: 24px;
}
.side-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.side-title i {
  color: var(--accent);
  font-size: 15px;
}
.info-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.info-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 9px 0;
  border-bottom: 1px dashed var(--border);
  font-size: 14px;
}
.info-list li:last-child {
  border-bottom: none;
}
.info-label {
  color: var(--text-muted);
}
.info-value {
  color: var(--text);
  font-weight: 500;
  text-align: right;
}
.side-list {
  display: flex;
  flex-direction: column;
}
.side-list li {
  border-bottom: 1px solid rgba(226, 232, 240, .7);
}
.side-list li:last-child {
  border-bottom: none;
}
.side-list-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 0;
  transition: var(--transition);
}
.side-list-link:hover .side-text {
  color: var(--accent-dark);
}
.side-list-link:hover .side-arrow {
  transform: translateX(3px);
  color: var(--accent);
}
.side-index {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  font-family: 'SFMono-Regular', Consolas, monospace;
  min-width: 22px;
}
.side-text {
  flex: 1;
  font-size: 14px;
  color: var(--text);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: var(--transition);
}
.side-arrow {
  color: #CBD5E1;
  font-size: 12px;
  transition: var(--transition);
}
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-cloud .tag-chip {
  background: #F8FAFC;
  border-color: var(--border);
  color: var(--text-muted);
  font-size: 13px;
}
.tag-cloud .tag-chip:hover {
  background: rgba(2, 195, 154, .1);
  border-color: rgba(2, 195, 154, .3);
  color: var(--accent-dark);
  transform: translateY(-1px);
}
.cta-card {
  background: linear-gradient(160deg, #0B2545 0%, #1D3A5F 100%);
  border: none;
  position: relative;
  overflow: hidden;
  text-align: center;
}
.cta-card-bg {
  position: absolute;
  top: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(2,195,154,.2), transparent 70%);
  border-radius: 50%;
}
.cta-card h3 {
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.cta-card p {
  color: rgba(255,255,255,.65);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 20px;
}
.btn-light {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-light:hover {
  background: var(--accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(2, 195, 154, .4);
}
.cta-phone {
  margin-top: 16px;
  margin-bottom: 0 !important;
  color: rgba(255,255,255,.5) !important;
  font-size: 13px !important;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.cta-phone i {
  color: var(--accent);
}

/* ===== Related Section ===== */
.related-section {
  padding: 64px 0;
  background: var(--bg);
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.section-head.center {
  justify-content: center;
  text-align: center;
  flex-direction: column;
  align-items: center;
}
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--accent-dark);
  text-transform: uppercase;
  margin-bottom: 6px;
}
.section-kicker::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.section-head.center .section-kicker::before {
  display: none;
}
.section-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
}
.section-desc {
  color: var(--text-muted);
  font-size: 15px;
  margin-top: 8px;
  max-width: 560px;
  text-align: center;
}
.section-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-xs);
  transition: var(--transition);
}
.section-more:hover {
  color: var(--accent-dark);
  border-color: rgba(2, 195, 154, .4);
  transform: translateX(2px);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid rgba(226, 232, 240, .7);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: var(--transition);
  display: block;
}
.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(2, 195, 154, .25);
}
.related-cover {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.related-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}
.related-card:hover .related-cover img {
  transform: scale(1.05);
}
.related-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(11, 37, 69, .35));
}
.related-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255, 107, 53, .9);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  backdrop-filter: blur(4px);
  box-shadow: 0 4px 12px rgba(255, 107, 53, .3);
}
.related-body {
  padding: 20px 22px 18px;
}
.related-body h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: var(--transition);
}
.related-card:hover .related-body h3 {
  color: var(--accent-dark);
}
.related-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}
.related-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: #94A3B8;
}
.read-more {
  color: var(--accent-dark);
  font-weight: 500;
  transition: var(--transition);
}
.related-card:hover .read-more {
  color: var(--accent);
}

/* ===== FAQ ===== */
.faq-section {
  padding: 72px 0;
  background: var(--card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.faq-grid {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #F8FAFC;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: rgba(2, 195, 154, .3);
  box-shadow: var(--shadow-sm);
}
.faq-item[open] {
  border-color: rgba(2, 195, 154, .35);
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  user-select: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary span {
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.5;
}
.faq-item summary i {
  color: var(--accent);
  font-size: 16px;
}
.faq-item summary .fa-chevron-down {
  transition: transform .3s ease;
  color: #94A3B8;
  font-size: 13px;
  flex-shrink: 0;
}
.faq-item[open] summary .fa-chevron-down {
  transform: rotate(180deg);
}
.faq-item p {
  padding: 0 22px 18px 52px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.75;
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 72px 0;
  position: relative;
}
.cta-panel {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.cta-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}
.cta-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(11, 37, 69, .96), rgba(11, 37, 69, .82) 50%, rgba(2, 195, 154, .45));
}
.cta-inner {
  position: relative;
  z-index: 2;
  padding: 56px 48px;
  text-align: center;
  color: #fff;
}
.cta-inner h2 {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.35;
}
.cta-inner p {
  font-size: 16px;
  color: rgba(255,255,255,.75);
  margin-bottom: 30px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary-lg {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 14px;
  background: var(--accent);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  transition: var(--transition);
  box-shadow: 0 8px 28px rgba(2, 195, 154, .4);
}
.btn-primary-lg:hover {
  background: var(--accent-dark);
  transform: translateY(-3px);
  box-shadow: 0 14px 40px rgba(2, 195, 154, .5);
}
.btn-outline-light {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 14px;
  border: 2px solid rgba(255,255,255,.5);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
  background: rgba(255,255,255,.05);
}
.btn-outline-light:hover {
  background: rgba(255,255,255,.15);
  border-color: #fff;
  transform: translateY(-3px);
}

/* ===== Footer ===== */
.site-footer {
  background: #0A1F3C;
  color: rgba(255,255,255,.65);
  padding: 56px 0 0;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr 1.3fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand .footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 14px;
}
.footer-logo i {
  color: var(--accent);
  font-size: 20px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,.45);
  max-width: 320px;
}
.site-footer h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.site-footer h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.site-footer ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.site-footer .link {
  font-size: 14px;
  color: rgba(255,255,255,.55);
  transition: var(--transition);
}
.site-footer .link:hover {
  color: var(--accent);
  transform: translateX(4px);
  display: inline-block;
}
.footer-contact p {
  font-size: 14px;
  color: rgba(255,255,255,.55);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}
.footer-contact i {
  color: var(--accent);
  font-size: 14px;
  width: 16px;
  text-align: center;
}
.footer-bottom {
  padding: 22px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,.35);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 1024px) {
  .side-shell {
    transform: translateX(-100%);
    transition: transform .35s cubic-bezier(.4, 0, .2, 1);
    box-shadow: none;
  }
  .side-shell.open {
    transform: translateX(0);
    box-shadow: 0 0 50px rgba(0,0,0,.4);
  }
  .menu-overlay.active {
    display: block;
  }
  .main-wrap {
    margin-left: 0;
  }
  .mobile-header {
    display: flex;
  }
  .article-hero {
    padding: 60px 0 48px;
  }
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-side {
    position: static;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
}
@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .hero-title {
    font-size: 28px;
  }
  .article-content {
    padding: 28px 20px;
  }
  .article-footer {
    padding: 18px 20px 20px;
  }
  .article-side {
    grid-template-columns: 1fr;
  }
  .related-grid {
    gap: 16px;
  }
  .cta-inner {
    padding: 40px 24px;
  }
  .section-title {
    font-size: 26px;
  }
  .faq-item summary {
    padding: 16px 16px;
    font-size: 15px;
  }
  .faq-item p {
    padding: 0 16px 16px 44px;
    font-size: 14px;
  }
}
@media (max-width: 520px) {
  .article-hero {
    padding: 44px 0 36px;
  }
  .hero-meta {
    gap: 8px;
  }
  .meta-item {
    font-size: 13px;
    padding: 4px 10px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .cta-actions {
    flex-direction: column;
    width: 100%;
  }
  .btn-primary-lg,
  .btn-outline-light {
    width: 100%;
    justify-content: center;
  }
  .article-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}
@media (min-width: 1025px) {
  .side-shell {
    transform: translateX(0) !important;
  }
}