/* roulang page: index */
/* ============ 设计变量 ============ */
:root {
  --primary: #2B5C8A;
  --primary-dark: #1F4668;
  --primary-light: #3B7BB5;
  --primary-10: rgba(43, 92, 138, 0.10);
  --primary-20: rgba(43, 92, 138, 0.20);
  --bg-main: #FFFFFF;
  --bg-alt: #F2F6FA;
  --bg-deep: #26343F;
  --text-main: #1E2A35;
  --text-secondary: #5B6873;
  --text-light: #8A96A2;
  --border: #E3E9EF;
  --accent: #E8873A;
  --accent-dark: #D06E20;
  --success: #2E9E6B;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-badge: 999px;
  --shadow-default: 0 2px 8px rgba(30, 42, 53, 0.06);
  --shadow-hover: 0 8px 24px rgba(30, 42, 53, 0.12);
  --shadow-lg: 0 12px 32px rgba(30, 42, 53, 0.14);
  --font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, sans-serif;
  --transition: 0.2s ease;
  --section-spacing: 96px;
  --container-width: 1200px;
}

/* ============ Reset / Base ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--bg-main);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--transition); }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }
ul, ol { list-style: none; }
.container { max-width: var(--container-width); padding-left: 24px; padding-right: 24px; }
section { position: relative; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.4; color: var(--text-main); }

/* ============ 通用组件 ============ */
.section-padding { padding: var(--section-spacing) 0; }
.section-alt { background: var(--bg-alt); }
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: 0.04em;
  color: var(--primary); background: var(--primary-10);
  padding: 6px 16px; border-radius: var(--radius-badge);
  margin-bottom: 12px; text-transform: uppercase;
}
.section-title { font-size: 28px; font-weight: 700; margin-bottom: 8px; letter-spacing: -0.01em; }
.section-desc { font-size: 15px; color: var(--text-secondary); max-width: 720px; margin-bottom: 40px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 15px; font-weight: 600; padding: 10px 24px;
  border-radius: var(--radius-btn); border: 1px solid transparent;
  transition: all var(--transition); line-height: 1.5;
}
.btn-primary-custom {
  background: var(--primary); color: #fff; border-color: var(--primary);
}
.btn-primary-custom:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 6px 16px rgba(43,92,138,0.25); }
.btn-primary-custom:active { transform: translateY(0); box-shadow: none; }
.btn-primary-custom:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-outline-custom {
  background: transparent; color: var(--primary); border-color: var(--primary);
}
.btn-outline-custom:hover { background: var(--primary-10); color: var(--primary-dark); }
.btn-outline-custom:active { transform: translateY(0); }
.btn-outline-custom:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-lg { padding: 14px 32px; font-size: 16px; }
.btn-block { width: 100%; }

.badge-tag {
  display: inline-block; font-size: 13px; font-weight: 500;
  background: var(--primary-10); color: var(--primary);
  padding: 4px 14px; border-radius: var(--radius-badge);
}
.badge-hot {
  display: inline-block; font-size: 13px; font-weight: 600;
  background: rgba(232,135,58,0.15); color: var(--accent-dark);
  padding: 4px 14px; border-radius: var(--radius-badge);
}

/* ============ 导航 ============ */
.site-header { position: sticky; top: 0; z-index: 1000; box-shadow: 0 1px 0 rgba(30,42,53,0.08); }
.top-bar {
  background: var(--bg-deep); color: rgba(255,255,255,0.85);
  font-size: 13px; line-height: 38px; height: 38px;
}
.top-bar .container { display: flex; justify-content: space-between; align-items: center; }
.top-bar .site-id { font-weight: 600; color: #fff; letter-spacing: 0.02em; }
.top-bar .site-id i { margin-right: 6px; font-size: 14px; color: var(--accent); }
.top-links { display: flex; gap: 24px; }
.top-links a { color: rgba(255,255,255,0.75); transition: color var(--transition); }
.top-links a:hover { color: #fff; }

.main-navbar {
  background: #fff; border-bottom: 1px solid var(--border); min-height: 64px;
}
.main-navbar .container { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.navbar-logo {
  font-size: 20px; font-weight: 700; color: var(--text-main);
  display: flex; align-items: center; gap: 8px; letter-spacing: -0.01em;
}
.navbar-logo i { color: var(--primary); font-size: 22px; }
.navbar-logo:hover { color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-menu > li > a {
  display: block; padding: 20px 16px; font-size: 15px; font-weight: 400;
  color: var(--text-secondary); border-bottom: 2px solid transparent;
  transition: all var(--transition); position: relative;
}
.nav-menu > li > a:hover { color: var(--primary); }
.nav-menu > li > a.active {
  color: var(--primary); font-weight: 600; border-bottom-color: var(--primary);
}
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-search { display: flex; align-items: center; position: relative; }
.nav-search input {
  border: 1px solid var(--border); border-radius: var(--radius-btn) 0 0 var(--radius-btn);
  padding: 7px 14px; font-size: 14px; width: 200px; background: var(--bg-alt);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.nav-search input:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-10); background: #fff;
}
.nav-search button {
  border: 1px solid var(--primary); background: var(--primary); color: #fff;
  border-radius: 0 var(--radius-btn) var(--radius-btn) 0;
  padding: 7px 14px; font-size: 14px; transition: background var(--transition);
}
.nav-search button:hover { background: var(--primary-dark); }
.navbar-toggler-custom {
  display: none; border: 1px solid var(--border); background: #fff;
  border-radius: var(--radius-btn); padding: 6px 10px; font-size: 18px; color: var(--text-main);
}
.navbar-toggler-custom:hover { border-color: var(--primary); color: var(--primary); }

/* ============ Hero Bento ============ */
.hero-section {
  background: var(--bg-alt) url('/assets/images/backpic/back-1.jpg') no-repeat center center / cover;
  padding: 72px 0 72px; position: relative;
}
.hero-section .overlay {
  position: absolute; inset: 0; background: rgba(242,246,250,0.88); pointer-events: none;
}
.hero-section .container { position: relative; z-index: 1; }
.hero-bento { align-items: stretch; }
.bento-main {
  background: #fff; border-radius: 16px; padding: 40px;
  box-shadow: var(--shadow-default); border: 1px solid var(--border);
  height: 100%; display: flex; flex-direction: column; justify-content: center;
}
.bento-main .hero-label {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--primary-10); color: var(--primary);
  font-size: 13px; font-weight: 600; padding: 4px 14px;
  border-radius: var(--radius-badge); margin-bottom: 16px; width: fit-content;
}
.bento-main h1 { font-size: 32px; font-weight: 700; line-height: 1.4; margin-bottom: 16px; letter-spacing: -0.01em; }
.bento-main h1 span { color: var(--primary); }
.bento-main .hero-desc { font-size: 15px; color: var(--text-secondary); margin-bottom: 24px; max-width: 520px; line-height: 1.8; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 24px; }
.trust-row { display: flex; gap: 16px; flex-wrap: wrap; }
.trust-item { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-secondary); }
.trust-item i { color: var(--success); font-size: 14px; }

.bento-side { height: 100%; }
.bento-card {
  background: #fff; border-radius: 12px; padding: 24px;
  border: 1px solid var(--border); box-shadow: var(--shadow-default);
  transition: all var(--transition); height: 100%;
}
.bento-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.bento-card .icon-wrap {
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--primary-10); display: flex; align-items: center; justify-content: center;
  margin-bottom: 12px; font-size: 18px; color: var(--primary);
}
.bento-card h4 { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.bento-card p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 0; }
.bento-cta {
  background: var(--bg-deep); border-radius: 12px; padding: 20px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  height: 100%; border: 1px solid rgba(255,255,255,0.1);
}
.bento-cta .text { color: #fff; font-size: 14px; font-weight: 500; }
.bento-cta .text strong { color: var(--accent); font-size: 16px; }
.bento-cta .btn { flex-shrink: 0; }

/* ============ 数据指标 ============ */
.stats-row { padding: 40px 0; background: #fff; border-bottom: 1px solid var(--border); }
.stat-item { text-align: center; padding: 16px; }
.stat-item .num { font-size: 32px; font-weight: 700; color: var(--primary); font-family: var(--font-family); letter-spacing: -0.02em; }
.stat-item .label { font-size: 14px; color: var(--text-secondary); margin-top: 4px; }

/* ============ 核心功能 ============ */
.func-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-card);
  padding: 28px 24px; box-shadow: var(--shadow-default);
  transition: all var(--transition); height: 100%;
}
.func-card:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.func-card .func-icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--primary-10); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; margin-bottom: 16px; transition: background var(--transition);
}
.func-card:hover .func-icon { background: var(--primary); color: #fff; }
.func-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.func-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 0; line-height: 1.7; }

/* ============ 使用场景 / 观影指南 ============ */
.scene-tabs { display: flex; flex-direction: column; gap: 4px; }
.scene-tab {
  display: flex; align-items: center; gap: 12px;
  padding: 16px 20px; border-radius: 10px; border: 1px solid transparent;
  font-size: 15px; font-weight: 500; color: var(--text-secondary);
  transition: all var(--transition); cursor: pointer; background: transparent;
  text-align: left;
}
.scene-tab i { font-size: 16px; width: 20px; color: var(--text-light); }
.scene-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: 0 4px 16px rgba(43,92,138,0.25); }
.scene-tab.active i { color: #fff; }
.scene-tab:not(.active):hover { background: var(--primary-10); color: var(--primary); }
.scene-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-card);
  padding: 32px; box-shadow: var(--shadow-default); height: 100%;
}
.scene-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 12px; }
.scene-card .scene-desc { font-size: 14px; color: var(--text-secondary); margin-bottom: 20px; }
.scene-points li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 14px; color: var(--text-main); padding: 6px 0;
}
.scene-points li i { color: var(--primary); margin-top: 4px; font-size: 14px; }

/* ============ 热门推荐 ============ */
.hot-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-card);
  overflow: hidden; box-shadow: var(--shadow-default); transition: all var(--transition); height: 100%;
}
.hot-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.hot-card .cover-wrap { position: relative; overflow: hidden; aspect-ratio: 16/9; }
.hot-card .cover-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.hot-card:hover .cover-wrap img { transform: scale(1.04); }
.hot-card .cover-overlay {
  position: absolute; top: 0; left: 0; right: 0; height: 48px;
  background: linear-gradient(to bottom, rgba(0,0,0,0.35), transparent); pointer-events: none;
}
.hot-card .cover-badge {
  position: absolute; top: 12px; left: 12px;
  background: var(--primary); color: #fff; font-size: 13px; font-weight: 600;
  padding: 4px 12px; border-radius: var(--radius-badge); z-index: 2;
}
.hot-card .cover-badge.hot { background: var(--accent); }
.hot-card .card-body { padding: 20px; }
.hot-card .card-body .tag-row { display: flex; gap: 8px; margin-bottom: 10px; }
.hot-card .card-body h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.hot-card .card-body p { font-size: 14px; color: var(--text-secondary); margin-bottom: 0; line-height: 1.7; }
.hot-card .card-link {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 14px; font-weight: 500; color: var(--primary); margin-top: 12px;
}
.hot-card .card-link:hover { color: var(--primary-dark); gap: 8px; }

/* ============ 价格方案 ============ */
.price-card {
  background: #fff; border: 1px solid var(--border); border-radius: 16px;
  padding: 32px; box-shadow: var(--shadow-default); height: 100%; position: relative;
  transition: all var(--transition);
}
.price-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.price-card.recommended {
  border: 2px solid var(--primary); box-shadow: 0 8px 32px rgba(43,92,138,0.15);
}
.price-card .rec-badge {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--primary); color: #fff; font-size: 13px; font-weight: 600;
  padding: 4px 16px; border-radius: var(--radius-badge); white-space: nowrap;
}
.price-card .plan-name { font-size: 16px; font-weight: 600; color: var(--text-secondary); margin-bottom: 8px; }
.price-card .price-amount { font-size: 36px; font-weight: 700; color: var(--primary); letter-spacing: -0.02em; display: flex; align-items: baseline; gap: 4px; margin-bottom: 4px; }
.price-card .price-amount .currency { font-size: 18px; font-weight: 600; }
.price-card .price-amount .period { font-size: 14px; font-weight: 400; color: var(--text-light); }
.price-card .price-summary { font-size: 13px; color: var(--text-light); margin-bottom: 20px; }
.price-card .feature-list { margin-bottom: 24px; }
.price-card .feature-list li {
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; color: var(--text-main); padding: 5px 0;
}
.price-card .feature-list li i { color: var(--success); font-size: 13px; }
.price-card .feature-list li.disabled { color: var(--text-light); }
.price-card .feature-list li.disabled i { color: var(--border); }

/* ============ 资讯 ============ */
.news-list .news-item {
  display: flex; align-items: flex-start; gap: 16px; padding: 16px 0;
  border-bottom: 1px solid var(--border); transition: background var(--transition);
}
.news-list .news-item:last-child { border-bottom: none; }
.news-item .date {
  flex-shrink: 0; background: var(--bg-alt); border-radius: 8px;
  text-align: center; padding: 8px 12px; min-width: 56px;
}
.news-item .date .day { font-size: 20px; font-weight: 700; color: var(--primary); line-height: 1.2; }
.news-item .date .month { font-size: 12px; color: var(--text-secondary); }
.news-item .content h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.news-item .content h4 a:hover { color: var(--primary); }
.news-item .content p { font-size: 13px; color: var(--text-secondary); margin-bottom: 0; }
.news-side-card {
  background: var(--bg-alt); border-radius: var(--radius-card);
  padding: 24px; margin-bottom: 24px;
}
.news-side-card h4 { font-size: 15px; font-weight: 600; margin-bottom: 12px; color: var(--text-main); }
.news-side-card .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.news-side-card .tag-cloud a {
  font-size: 13px; background: #fff; color: var(--text-secondary);
  border: 1px solid var(--border); border-radius: var(--radius-badge);
  padding: 4px 14px; transition: all var(--transition);
}
.news-side-card .tag-cloud a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.side-recommend li {
  display: flex; gap: 12px; padding: 8px 0; align-items: flex-start;
  border-bottom: 1px dashed var(--border);
}
.side-recommend li:last-child { border-bottom: none; }
.side-recommend li i { color: var(--primary); font-size: 12px; margin-top: 6px; }
.side-recommend li a { font-size: 14px; color: var(--text-secondary); transition: color var(--transition); }
.side-recommend li a:hover { color: var(--primary); }

/* ============ FAQ ============ */
.faq-accordion {
  border: 1px solid var(--border); border-radius: var(--radius-card); overflow: hidden; background: #fff;
}
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:last-child { border-bottom: none; }
.faq-item .faq-question {
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px 24px; cursor: pointer; font-size: 15px; font-weight: 600;
  transition: all var(--transition); border: none; background: transparent; width: 100%; text-align: left;
}
.faq-item .faq-question:hover { background: var(--primary-10); color: var(--primary); }
.faq-item.active .faq-question { border-left: 3px solid var(--primary); color: var(--primary); background: var(--primary-10); }
.faq-item .faq-question .arrow { transition: transform var(--transition); font-size: 14px; color: var(--text-light); }
.faq-item.active .faq-question .arrow { transform: rotate(45deg); color: var(--primary); }
.faq-item .faq-answer { display: none; padding: 0 24px 20px; font-size: 14px; color: var(--text-secondary); line-height: 1.8; }
.faq-item.active .faq-answer { display: block; }

/* ============ CTA 条带 ============ */
.cta-band {
  background: var(--bg-deep) url('/assets/images/backpic/back-2.jpg') no-repeat center center / cover;
  padding: 64px 0; position: relative;
}
.cta-band .overlay { position: absolute; inset: 0; background: rgba(38,52,63,0.85); }
.cta-band .container { position: relative; z-index: 1; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 24px; }
.cta-band .cta-text { color: #fff; max-width: 560px; }
.cta-band .cta-text h2 { color: #fff; font-size: 24px; font-weight: 700; margin-bottom: 8px; }
.cta-band .cta-text p { color: rgba(255,255,255,0.8); font-size: 14px; margin-bottom: 0; }
.cta-band .btn { flex-shrink: 0; }

/* ============ 页脚 ============ */
.site-footer { background: var(--bg-deep); color: rgba(255,255,255,0.7); padding: 48px 0 0; font-size: 14px; }
.footer-about { padding-right: 24px; }
.footer-about .footer-logo { color: #fff; font-size: 18px; font-weight: 700; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.footer-about .footer-logo i { color: var(--accent); }
.footer-about p { font-size: 13px; line-height: 1.7; color: rgba(255,255,255,0.6); }
.footer-title { color: #fff; font-size: 14px; font-weight: 600; margin-bottom: 16px; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { color: rgba(255,255,255,0.6); font-size: 13px; transition: color var(--transition); }
.footer-links a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1); margin-top: 40px;
  padding: 20px 0; font-size: 13px; color: rgba(255,255,255,0.4);
  text-align: center;
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: #fff; }

/* ============ 响应式 ============ */
@media (max-width: 991px) {
  :root { --section-spacing: 72px; }
  .section-title { font-size: 24px; }
  .nav-menu { display: none; }
  .navbar-toggler-custom { display: inline-flex; }
  .nav-menu.open { display: flex; flex-direction: column; width: 100%; padding: 8px 0 16px; }
  .nav-menu > li > a { padding: 12px 16px; border-bottom: 1px solid var(--border); }
  .nav-search { display: none; }
  .hero-section { padding: 48px 0; }
  .bento-main { padding: 28px; }
  .bento-main h1 { font-size: 24px; }
  .hero-actions .btn { width: 100%; }
  .func-card { padding: 24px; }
  .price-card { margin-bottom: 24px; }
  .cta-band .container { flex-direction: column; text-align: center; }
  .cta-band .btn { width: 100%; max-width: 320px; }
}

@media (max-width: 767px) {
  :root { --section-spacing: 56px; }
  .top-bar .container { flex-direction: column; height: auto; padding-top: 4px; padding-bottom: 4px; }
  .top-links { gap: 16px; }
  .bento-main { padding: 20px; }
  .bento-main h1 { font-size: 22px; }
  .hero-section { padding: 32px 0; }
  .stat-item .num { font-size: 24px; }
  .scene-card { margin-top: 16px; }
  .news-item .date { min-width: 48px; padding: 6px 8px; }
  .news-item .date .day { font-size: 16px; }
}

@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .btn { width: 100%; }
  .nav-right .btn { width: auto; }
  .top-links { display: none; }
  .cta-band .btn { width: 100%; }
}

/* roulang page: category1 */
/* ============ 设计变量 ============ */
        :root {
            --primary: #2B5C8A;
            --primary-dark: #1F4668;
            --primary-light: #3B7BB5;
            --primary-10: rgba(43, 92, 138, 0.10);
            --primary-20: rgba(43, 92, 138, 0.20);
            --bg-main: #FFFFFF;
            --bg-alt: #F2F6FA;
            --bg-deep: #26343F;
            --text-main: #1E2A35;
            --text-secondary: #5B6873;
            --text-light: #8A96A2;
            --border: #E3E9EF;
            --accent: #E8873A;
            --accent-dark: #D06E20;
            --success: #2E9E6B;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --shadow-default: 0 2px 8px rgba(30, 42, 53, 0.06);
            --shadow-hover: 0 8px 24px rgba(30, 42, 53, 0.12);
            --shadow-lg: 0 12px 32px rgba(30, 42, 53, 0.14);
            --font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", system-ui, -apple-system, sans-serif;
            --transition: 0.2s ease;
            --section-spacing: 96px;
            --container-width: 1200px;
        }
        @media (max-width: 991px) {
            :root {
                --section-spacing: 72px;
            }
        }
        @media (max-width: 575px) {
            :root {
                --section-spacing: 56px;
            }
        }

        /* ============ 基础 Reset ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg-main);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            margin: 0;
            padding: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
        }
        input,
        textarea {
            font-family: inherit;
        }
        ul,
        ol {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .container {
            max-width: var(--container-width);
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ============ 通用组件 ============ */
        .section-padding {
            padding: var(--section-spacing) 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--primary);
            background: var(--primary-10);
            padding: 6px 16px;
            border-radius: var(--radius-badge);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
            color: var(--text-main);
        }
        .section-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 auto 0;
            text-align: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            border: 1px solid transparent;
            transition: all var(--transition);
            line-height: 1.5;
        }
        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(43, 92, 138, 0.25);
        }
        .btn-primary-custom:active {
            transform: translateY(0);
            box-shadow: none;
        }
        .btn-primary-custom:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-outline-custom {
            background: #fff;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline-custom:hover {
            background: var(--primary-10);
            color: var(--primary-dark);
        }
        .btn-outline-custom:active {
            transform: translateY(0);
        }
        .btn-outline-custom:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
        }

        /* ============ 导航 ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #fff;
        }
        .top-bar {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.8);
            font-size: 13px;
            height: 38px;
            display: flex;
            align-items: center;
        }
        .top-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .top-bar .site-id {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: #fff;
        }
        .top-bar .site-id i {
            color: var(--accent);
        }
        .top-links {
            display: flex;
            gap: 24px;
        }
        .top-links a {
            display: flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, 0.75);
            transition: color var(--transition);
            font-size: 13px;
        }
        .top-links a:hover {
            color: #fff;
        }
        .main-navbar {
            background: #fff;
            border-bottom: 1px solid var(--border);
            min-height: 64px;
        }
        .main-navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            position: relative;
        }
        .navbar-logo {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.01em;
            padding: 14px 0;
        }
        .navbar-logo i {
            color: var(--primary);
            font-size: 22px;
        }
        .navbar-logo:hover {
            color: var(--primary);
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-menu>li>a {
            display: block;
            padding: 20px 16px;
            font-size: 15px;
            font-weight: 400;
            color: var(--text-secondary);
            border-bottom: 2px solid transparent;
            transition: all var(--transition);
        }
        .nav-menu>li>a:hover {
            color: var(--primary);
        }
        .nav-menu>li>a.active {
            color: var(--primary);
            font-weight: 600;
            border-bottom-color: var(--primary);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search {
            display: flex;
            align-items: center;
        }
        .nav-search input {
            border: 1px solid var(--border);
            border-radius: var(--radius-btn) 0 0 var(--radius-btn);
            padding: 7px 14px;
            font-size: 14px;
            width: 200px;
            background: var(--bg-alt);
            transition: border-color var(--transition), box-shadow var(--transition);
            height: 38px;
        }
        .nav-search input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px var(--primary-10);
            background: #fff;
        }
        .nav-search button {
            border: 1px solid var(--primary);
            background: var(--primary);
            color: #fff;
            border-radius: 0 var(--radius-btn) var(--radius-btn) 0;
            padding: 7px 14px;
            font-size: 14px;
            transition: background var(--transition);
            height: 38px;
            display: flex;
            align-items: center;
        }
        .nav-search button:hover {
            background: var(--primary-dark);
        }
        .navbar-toggler-custom {
            display: none;
            border: 1px solid var(--border);
            background: #fff;
            border-radius: var(--radius-btn);
            padding: 6px 10px;
            font-size: 18px;
            color: var(--text-main);
            transition: all var(--transition);
        }
        .navbar-toggler-custom:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        /* ============ 页头区 / 分类页 Hero ============ */
        .page-hero {
            background: var(--bg-alt) url('/assets/images/backpic/back-2.jpg') no-repeat center center / cover;
            position: relative;
            padding: 72px 0 64px;
            border-bottom: 1px solid var(--border);
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(255, 255, 255, 0.9);
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .breadcrumb-custom a {
            color: var(--primary);
        }
        .breadcrumb-custom a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        .breadcrumb-custom .sep {
            color: var(--text-light);
            font-size: 12px;
        }
        .breadcrumb-custom .current {
            color: var(--text-secondary);
            font-weight: 500;
        }
        .page-hero h1 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
            max-width: 680px;
        }
        .page-hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 28px;
        }
        .page-hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-info-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            box-shadow: var(--shadow-hover);
            padding: 28px 24px;
            margin-left: 24px;
        }
        .hero-info-card .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-info-card .card-title i {
            color: var(--primary);
        }
        .hero-info-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .hero-info-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .hero-info-list li i {
            color: var(--success);
            font-size: 16px;
            margin-top: 2px;
            flex-shrink: 0;
        }
        .hero-info-list li strong {
            color: var(--text-main);
            font-weight: 600;
        }
        .hero-info-note {
            margin-top: 20px;
            padding-top: 16px;
            border-top: 1px dashed var(--border);
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ============ 筛选标签栏 ============ */
        .filter-bar {
            display: flex;
            align-items: center;
            gap: 16px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 14px 20px;
            margin-bottom: 32px;
            box-shadow: var(--shadow-default);
            flex-wrap: wrap;
        }
        .filter-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            white-space: nowrap;
        }
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            flex: 1;
        }
        .filter-tabs a {
            display: inline-flex;
            align-items: center;
            padding: 6px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-alt);
            border: 1px solid transparent;
            border-radius: var(--radius-badge);
            transition: all var(--transition);
        }
        .filter-tabs a:hover {
            color: var(--primary);
            background: var(--primary-10);
        }
        .filter-tabs a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }

        /* ============ 视频卡片 ============ */
        .video-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-default);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .video-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-20);
        }
        .video-card-thumb {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-alt);
        }
        .video-card-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }
        .video-card:hover .video-card-thumb img {
            transform: scale(1.03);
        }
        .video-card-thumb .badge-cover {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
        }
        .video-card-body {
            padding: 20px 20px 16px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .video-card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 51px;
        }
        .video-card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }
        .video-card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-light);
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }
        .video-card-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .video-card-meta .tag-list {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-left: auto;
        }
        .video-card-meta .tag-list .mini-tag {
            font-size: 12px;
            color: var(--primary);
            background: var(--primary-10);
            padding: 2px 10px;
            border-radius: var(--radius-badge);
        }

        /* ============ 分页 ============ */
        .pagination-wrap {
            display: flex;
            justify-content: center;
            margin-top: 40px;
        }
        .pagination-custom {
            display: flex;
            gap: 8px;
        }
        .pagination-custom a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: #fff;
            transition: all var(--transition);
        }
        .pagination-custom a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-10);
        }
        .pagination-custom a.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .pagination-custom a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .pagination-custom a.disabled {
            opacity: 0.5;
            pointer-events: none;
        }

        /* ============ 核心优势 ============ */
        .advantage-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            height: 100%;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .advantage-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-20);
        }
        .advantage-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: var(--primary-10);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 18px;
        }
        .advantage-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
        }
        .advantage-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ============ 使用流程 ============ */
        .flow-step {
            position: relative;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            height: 100%;
            text-align: center;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .flow-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .flow-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .flow-step h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .flow-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .flow-arrow {
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 20px;
            position: absolute;
            top: 50%;
            right: -18px;
            transform: translateY(-50%);
            z-index: 2;
            background: var(--bg-alt);
            border-radius: 50%;
            width: 32px;
            height: 32px;
        }
        @media (max-width: 991px) {
            .flow-arrow {
                display: none;
            }
        }

        /* ============ FAQ ============ */
        .accordion-custom {
            max-width: 860px;
            margin: 0 auto;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            background: #fff;
            box-shadow: var(--shadow-default);
        }
        .accordion-custom .accordion-item {
            border: none;
            border-bottom: 1px solid var(--border);
            background: transparent;
        }
        .accordion-custom .accordion-item:last-child {
            border-bottom: none;
        }
        .accordion-custom .accordion-header {
            margin: 0;
        }
        .accordion-custom .accordion-button {
            padding: 20px 24px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            background: #fff;
            border: none;
            box-shadow: none;
            transition: all var(--transition);
            border-left: 3px solid transparent;
        }
        .accordion-custom .accordion-button:hover {
            color: var(--primary);
            background: var(--primary-10);
            border-left-color: var(--primary);
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: none;
            border-left-color: var(--primary);
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: var(--primary-10);
            border-left-color: var(--primary);
        }
        .accordion-custom .accordion-button::after {
            background-image: none;
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            content: "\f067";
            font-size: 14px;
            color: var(--primary);
            width: auto;
            height: auto;
            transition: transform 0.25s ease;
        }
        .accordion-custom .accordion-button:not(.collapsed)::after {
            background-image: none;
            content: "\f068";
            transform: none;
        }
        .accordion-custom .accordion-body {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ============ CTA 条带 ============ */
        .cta-section {
            background: var(--bg-alt) url('/assets/images/backpic/back-3.jpg') no-repeat center center / cover;
            position: relative;
            padding: 72px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(242, 246, 250, 0.92);
        }
        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .cta-inner p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--bg-deep);
            color: rgba(255, 255, 255, 0.7);
            padding-top: 56px;
        }
        .site-footer .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 16px;
        }
        .site-footer .footer-logo i {
            color: var(--accent);
        }
        .site-footer .footer-about p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 0;
        }
        .site-footer .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .site-footer .footer-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: all var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin-top: 40px;
            padding: 20px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom .container {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
            transition: color var(--transition);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ============ 响应式 ============ */
        @media (max-width: 991px) {
            .navbar-toggler-custom {
                display: block;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 8px 0;
                z-index: 999;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu>li>a {
                padding: 14px 24px;
                border-bottom: none;
                border-left: 3px solid transparent;
            }
            .nav-menu>li>a.active {
                border-bottom: none;
                border-left-color: var(--primary);
                background: var(--primary-10);
            }
            .nav-right {
                display: none;
            }
            .page-hero {
                padding: 56px 0 48px;
            }
            .page-hero h1 {
                font-size: 28px;
            }
            .hero-info-card {
                margin-left: 0;
                margin-top: 32px;
            }
            .flow-arrow {
                display: none;
            }
        }
        @media (max-width: 767px) {
            .top-links a span {
                display: none;
            }
            .top-links {
                gap: 12px;
            }
            .section-title {
                font-size: 24px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero-actions .btn {
                width: 100%;
            }
        }
        @media (max-width: 575px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .filter-bar {
                padding: 12px 14px;
                gap: 10px;
            }
            .filter-tabs a {
                padding: 5px 14px;
                font-size: 13px;
            }
            .video-card-title {
                font-size: 16px;
            }
            .btn-lg {
                width: 100%;
            }
            .cta-inner h2 {
                font-size: 24px;
            }
            .pagination-custom a {
                min-width: 36px;
                height: 36px;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}