/* roulang page: index */
:root {
  --brand-600: #2E5F8A;
  --brand-500: #3B6E9B;
  --brand-100: #D5E4EF;
  --brand-50: #E4EEF5;
  --brand-800: #16324A;
  --accent-500: #B88A5C;
  --accent-200: #E9D7C0;
  --text-main: #1A2D42;
  --text-sub: #5B6B7B;
  --text-placeholder: #A0B0BE;
  --bg-page: #F7F9FB;
  --border-color: #E2EAF0;
  --radius-card: 20px;
  --radius-btn: 999px;
  --shadow-card: 0 4px 20px rgba(30,64,90,0.06);
  --shadow-hover: 0 12px 32px rgba(30,64,90,0.10);
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { font-family:'PingFang SC','HarmonyOS Sans','Noto Sans SC','Microsoft YaHei',sans-serif; background:var(--bg-page); color:var(--text-main); line-height:1.7; -webkit-font-smoothing:antialiased; }
img { max-width:100%; display:block; }
a { text-decoration:none; color:inherit; transition:color .2s ease; }
button { font-family:inherit; cursor:pointer; }
.container-page { max-width:1200px; margin:0 auto; padding:0 24px; }

/* ========== Nav ========== */
.nav-link { position:relative; padding:8px 16px; font-size:15px; font-weight:500; color:var(--text-sub); border-radius:999px; transition:all .25s ease; }
.nav-link:hover { color:var(--brand-600); background:rgba(46,95,138,.06); }
.nav-link.active { color:var(--brand-600); font-weight:600; background:rgba(46,95,138,.08); }
.nav-link.active::before { content:''; display:inline-block; width:6px; height:6px; border-radius:50%; background:var(--accent-500); margin-right:6px; vertical-align:middle; }
#site-header { top:16px; left:50%; transform:translateX(-50%); width:min(1200px, calc(100vw - 32px)); z-index:100; position:fixed; transition:box-shadow .3s ease, background .3s ease; }
#site-header.scrolled { box-shadow:0 8px 30px rgba(30,64,90,0.12); }
.nav-wrap { background:rgba(255,255,255,.82); backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px); border:1px solid rgba(255,255,255,.6); border-radius:999px; box-shadow:var(--shadow-card); }
.nav-cta { display:inline-flex; align-items:center; gap:8px; padding:10px 24px; border-radius:999px; background:var(--brand-600); color:#fff; font-size:14px; font-weight:600; transition:all .25s ease; }
.nav-cta:hover { background:var(--brand-500); box-shadow:0 6px 16px rgba(46,95,138,.25); transform:translateY(-1px); }
.nav-cta:active { transform:translateY(0) scale(.98); }
.nav-cta:focus-visible { outline:3px solid rgba(184,138,92,.5); outline-offset:2px; }
.mobile-menu { background:rgba(255,255,255,.96); backdrop-filter:blur(16px); border-radius:24px; box-shadow:0 20px 50px rgba(30,64,90,.15); border:1px solid var(--border-color); overflow:hidden; }
.mobile-menu a { display:block; padding:14px 20px; font-size:15px; font-weight:500; color:var(--text-main); border-bottom:1px solid #F0F4F8; transition:background .2s; }
.mobile-menu a:hover { background:var(--brand-50); }
.mobile-menu a.active { color:var(--brand-600); font-weight:600; background:var(--brand-50); }
.mobile-cta { padding:16px 20px; }

/* ========== Buttons ========== */
.btn-primary { display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:14px 34px; border-radius:999px; background:var(--brand-600); color:#fff; font-size:16px; font-weight:600; border:2px solid transparent; transition:all .25s ease; box-shadow:0 4px 14px rgba(46,95,138,.2); }
.btn-primary:hover { background:var(--brand-500); box-shadow:0 8px 22px rgba(46,95,138,.28); transform:translateY(-2px); }
.btn-primary:active { transform:translateY(0) scale(.98); }
.btn-primary:focus-visible { outline:3px solid rgba(184,138,92,.5); outline-offset:3px; }
.btn-outline { display:inline-flex; align-items:center; justify-content:center; gap:8px; padding:14px 34px; border-radius:999px; background:transparent; color:var(--brand-600); font-size:16px; font-weight:600; border:2px solid var(--brand-100); transition:all .25s ease; }
.btn-outline:hover { background:var(--brand-50); border-color:var(--brand-600); transform:translateY(-2px); }
.btn-outline:active { transform:translateY(0) scale(.98); }
.btn-outline:focus-visible { outline:3px solid rgba(46,95,138,.3); outline-offset:3px; }

/* ========== Badges ========== */
.badge { display:inline-flex; align-items:center; gap:6px; padding:6px 16px; border-radius:999px; background:var(--accent-200); color:#7A5C42; font-size:13px; font-weight:600; letter-spacing:.3px; }
.category-badge { display:inline-block; padding:3px 12px; border-radius:999px; background:var(--accent-200); color:#7A5C42; font-size:12px; font-weight:600; }

/* ========== News Cards ========== */
.news-card { display:flex; align-items:center; gap:20px; padding:22px 24px; border-radius:var(--radius-card); background:#fff; border:1px solid var(--border-color); box-shadow:var(--shadow-card); transition:all .3s ease; }
.news-card:hover { background:#F7FAFD; transform:translateY(-3px); box-shadow:var(--shadow-hover); border-color:transparent; }
.news-card:hover .news-arrow { background:var(--brand-50); color:var(--brand-600); border-color:transparent; }
.news-card:hover .news-title { color:var(--brand-600); }
.date-box { display:flex; flex-direction:column; align-items:center; justify-content:center; min-width:90px; padding:10px 14px; border-radius:16px; background:var(--brand-50); }
.date-day { font-size:26px; font-weight:800; color:var(--accent-500); line-height:1.1; }
.date-month { font-size:13px; color:var(--text-sub); margin-top:2px; }
.news-title { font-size:18px; font-weight:600; color:var(--text-main); transition:color .2s; line-height:1.4; }
.news-excerpt { font-size:14px; color:var(--text-sub); margin-top:6px; display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden; }
.news-arrow { display:flex; align-items:center; justify-content:center; width:44px; height:44px; border-radius:50%; border:1px solid var(--brand-100); background:#fff; color:var(--brand-600); transition:all .3s ease; flex-shrink:0; }
.empty-state { padding:60px 20px; text-align:center; color:var(--text-sub); }
.empty-state i { font-size:36px; color:var(--text-placeholder); margin-bottom:12px; display:block; }

/* ========== FAQ ========== */
.faq-item { border-radius:16px; background:#fff; border:1px solid var(--border-color); box-shadow:var(--shadow-card); overflow:hidden; transition:all .3s ease; }
.faq-item.active { background:var(--brand-50); border-color:var(--brand-100); }
.faq-question { display:flex; align-items:center; justify-content:space-between; padding:20px 24px; cursor:pointer; font-size:16px; font-weight:600; color:var(--text-main); transition:color .2s; }
.faq-question:hover { color:var(--brand-600); }
.faq-icon { width:28px; height:28px; border-radius:50%; background:var(--brand-50); color:var(--brand-600); display:flex; align-items:center; justify-content:center; font-size:12px; flex-shrink:0; transition:all .3s ease; }
.faq-item.active .faq-icon { background:var(--brand-600); color:#fff; transform:rotate(180deg); }
.faq-answer { max-height:0; overflow:hidden; transition:max-height .35s ease; }
.faq-answer p { padding:0 24px 20px; font-size:15px; color:var(--text-sub); line-height:1.8; }

/* ========== Stats ========== */
.stat-number { font-size:52px; font-weight:800; color:#fff; line-height:1.1; letter-spacing:-1px; }
.stat-number span { color:var(--accent-500); }
.stat-label { font-size:14px; color:rgba(255,255,255,.7); margin-top:6px; }
.partner-logo { display:flex; align-items:center; justify-content:center; padding:20px 28px; border-radius:14px; background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.08); color:rgba(255,255,255,.45); font-size:15px; font-weight:600; transition:all .3s ease; letter-spacing:.5px; white-space:nowrap; }
.partner-logo:hover { background:rgba(255,255,255,.1); color:rgba(255,255,255,.75); }

/* ========== Footer ========== */
.footer-link { display:block; padding:5px 0; font-size:14px; color:rgba(180,198,216,.75); transition:all .25s ease; }
.footer-link:hover { color:#fff; padding-left:6px; }
.footer-title { font-size:16px; font-weight:600; color:#fff; margin-bottom:16px; }
.footer-social { display:inline-flex; align-items:center; justify-content:center; width:38px; height:38px; border-radius:50%; background:rgba(255,255,255,.1); color:rgba(255,255,255,.7); transition:all .25s ease; }
.footer-social:hover { background:var(--accent-500); color:#fff; transform:translateY(-3px); }

/* ========== Custom ========== */
.section-pad { padding:80px 0; }
@media (max-width:768px) { .section-pad { padding:56px 0; } .stat-number { font-size:40px; } }
.hero-overlay { background-image:url('/assets/images/backpic/back-1.png'); background-size:cover; background-position:center; }
.serif-quote { font-family:'Noto Serif SC','Songti SC',serif; font-weight:600; color:var(--brand-600); }
.bento-card { position:relative; border-radius:var(--radius-card); background:#fff; border:1px solid var(--border-color); box-shadow:var(--shadow-card); overflow:hidden; transition:all .3s ease; }
.bento-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-hover); border-color:transparent; }
.bento-card::before { content:''; position:absolute; top:0; left:0; right:0; height:3px; background:linear-gradient(90deg, var(--brand-600), var(--accent-500)); opacity:0; transition:opacity .3s ease; }
.bento-card:hover::before { opacity:1; }
.bento-card .bento-icon { display:flex; align-items:center; justify-content:center; width:52px; height:52px; border-radius:14px; background:var(--brand-50); color:var(--brand-600); font-size:22px; transition:all .3s ease; }
.bento-card:hover .bento-icon { background:var(--brand-600); color:#fff; }
.cta-input { height:52px; border-radius:12px; border:1px solid var(--brand-100); padding:0 20px; font-size:15px; color:var(--text-main); outline:none; transition:all .25s ease; width:100%; }
.cta-input:focus { border-color:var(--brand-600); box-shadow:0 0 0 3px rgba(46,95,138,.12); }
.cta-input::placeholder { color:var(--text-placeholder); }
input.cta-input[type="email"] { font-family:inherit; }

/* roulang page: category1 */
:root {
    --primary: #2E5F8A;
    --primary-hover: #3B6E9B;
    --primary-light: #E4EEF5;
    --primary-border: #D5E4EF;
    --primary-dark: #16324A;
    --accent: #B88A5C;
    --accent-light: #E9D7C0;
    --bg: #F7F9FB;
    --surface: #FFFFFF;
    --text: #1A2D42;
    --muted: #5B6B7B;
    --placeholder: #A0B0BE;
    --border: #E2EAF0;
    --radius-card: 20px;
    --radius-btn: 999px;
    --shadow-sm: 0 4px 20px rgba(30, 64, 90, 0.06);
    --shadow-lg: 0 12px 32px rgba(30, 64, 90, 0.10);
    --container: 1200px;
  }

  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: "PingFang SC", "HarmonyOS Sans", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }

  a {
    text-decoration: none;
    color: inherit;
  }

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

  button,
  input {
    font-family: inherit;
  }

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

  .nav-wrap {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: min(1200px, calc(100vw - 32px));
    z-index: 50;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: 999px;
    box-shadow: 0 4px 20px rgba(30, 64, 90, 0.08);
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 999px;
    color: var(--text);
    font-size: 15px;
    font-weight: 500;
    position: relative;
    transition: all 0.22s ease;
  }

  .nav-link:hover {
    color: var(--primary);
    background: var(--primary-light);
  }

  .nav-link.active {
    color: var(--primary);
    font-weight: 600;
    background: rgba(228, 238, 245, 0.6);
  }

  .nav-link.active::before {
    content: "";
    width: 4px;
    height: 4px;
    border-radius: 99px;
    background: var(--primary);
    display: inline-block;
    margin-right: 2px;
  }

  .nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: #ffffff;
    padding: 10px 22px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.22s ease;
    box-shadow: 0 4px 14px rgba(46, 95, 138, 0.25);
  }

  .nav-cta:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(46, 95, 138, 0.3);
  }

  .nav-cta:active {
    transform: translateY(0);
  }

  .nav-cta:focus-visible,
  .btn-primary:focus-visible,
  .btn-outline:focus-visible,
  .cta-input:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
  }

  .mobile-drawer {
    display: none;
    position: fixed;
    top: 78px;
    left: 16px;
    right: 16px;
    z-index: 49;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-radius: 24px;
    padding: 18px;
    box-shadow: var(--shadow-lg);
  }

  .mobile-drawer.open {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .mobile-link {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    transition: all 0.2s ease;
    text-align: center;
  }

  .mobile-link:hover {
    background: var(--primary-light);
    color: var(--primary);
  }

  .mobile-link.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
  }

  .btn-primary,
  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 999px;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.2;
    cursor: pointer;
    transition: all 0.22s ease;
    border: 1px solid transparent;
  }

  .btn-primary {
    background: var(--primary);
    color: #ffffff;
    box-shadow: 0 6px 18px rgba(46, 95, 138, 0.22);
  }

  .btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(46, 95, 138, 0.28);
  }

  .btn-primary:active {
    transform: translateY(0);
  }

  .btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
  }

  .btn-outline:hover {
    background: var(--primary-light);
    border-color: var(--primary-hover);
    color: var(--primary-hover);
  }

  .btn-outline:active {
    transform: translateY(0);
  }

  .hero-section {
    position: relative;
    padding: 150px 0 90px;
    background:
      linear-gradient(135deg, rgba(234, 241, 247, 0.96), rgba(255, 255, 255, 0.98) 45%, rgba(228, 238, 245, 0.9)),
      url('/assets/images/backpic/back-2.png') center top / cover no-repeat;
    overflow: hidden;
  }

  .hero-section::before {
    content: "";
    position: absolute;
    right: -80px;
    top: 60px;
    width: 360px;
    height: 360px;
    background: radial-gradient(circle, rgba(184, 138, 92, 0.14), transparent 65%);
    pointer-events: none;
  }

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

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent-light);
    color: #6e4f2f;
    font-size: 13px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 20px;
  }

  .hero-title {
    font-size: 42px;
    line-height: 1.2;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text);
    margin-bottom: 22px;
  }

  .hero-title span {
    color: var(--accent);
    position: relative;
  }

  .hero-desc {
    font-size: 17px;
    color: var(--muted);
    line-height: 1.9;
    max-width: 560px;
    margin-bottom: 32px;
  }

  .hero-media {
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 20px 48px rgba(30, 64, 90, 0.16);
    transform: rotate(1deg);
    transition: transform 0.3s ease;
  }

  .hero-media:hover {
    transform: rotate(0deg) translateY(-4px);
  }

  .hero-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .section {
    padding: 90px 0;
  }

  .section-subtitle {
    font-size: 15px;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
  }

  .section-title {
    font-size: 34px;
    line-height: 1.3;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 16px;
  }

  .section-desc {
    font-size: 16px;
    color: var(--muted);
    max-width: 720px;
    line-height: 1.8;
  }

  .stats-bar {
    background: var(--primary-dark);
    border-radius: 28px;
    padding: 48px 40px;
    position: relative;
    overflow: hidden;
  }

  .stats-bar::before {
    content: "";
    position: absolute;
    left: -40px;
    bottom: -60px;
    width: 220px;
    height: 220px;
    background: radial-gradient(circle, rgba(184, 138, 92, 0.25), transparent 70%);
  }

  .stats-item {
    text-align: center;
    position: relative;
    z-index: 2;
  }

  .stats-number {
    font-size: 44px;
    font-weight: 800;
    color: #ffffff;
    line-height: 1.1;
  }

  .stats-number i {
    font-style: normal;
    color: var(--accent);
  }

  .stats-label {
    color: #A8BFD0;
    font-size: 14px;
    margin-top: 8px;
    letter-spacing: 1px;
  }

  .banner {
    position: relative;
    border-radius: 24px;
    min-height: 320px;
    background-size: cover;
    background-position: center;
    overflow: hidden;
    display: flex;
    align-items: center;
  }

  .banner-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(22, 50, 74, 0.82), rgba(22, 50, 74, 0.42));
  }

  .banner-inner {
    position: relative;
    z-index: 2;
    max-width: 620px;
    padding: 40px;
  }

  .banner-tag {
    display: inline-block;
    background: var(--accent);
    color: #ffffff;
    font-size: 13px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 999px;
    margin-bottom: 14px;
  }

  .banner-inner h2 {
    color: #ffffff;
    font-size: 28px;
    line-height: 1.35;
    font-weight: 700;
    margin-bottom: 12px;
  }

  .banner-inner p {
    color: rgba(255, 255, 255, 0.82);
    font-size: 15px;
    line-height: 1.8;
  }

  .feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 72px;
    margin-top: 50px;
  }

  .feature-media {
    border-radius: 22px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }

  .feature-media:hover {
    transform: translateY(-6px);
    box-shadow: 0 18px 42px rgba(30, 64, 90, 0.14);
  }

  .feature-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .feature-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .feature-index {
    font-size: 14px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 3px;
    margin-bottom: 12px;
  }

  .feature-content h3 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.4;
    margin-bottom: 14px;
  }

  .feature-content p {
    font-size: 16px;
    line-height: 1.9;
    color: var(--muted);
    margin-bottom: 20px;
  }

  .feature-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-weight: 600;
    font-size: 15px;
    transition: gap 0.2s ease, color 0.2s ease;
  }

  .feature-link:hover {
    color: var(--accent);
    gap: 14px;
  }

  .scene-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 44px;
  }

  .scene-item {
    background: var(--surface);
    border-radius: 20px;
    padding: 32px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: all 0.25s ease;
  }

  .scene-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-border);
  }

  .scene-icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 18px;
    transition: background 0.25s ease, color 0.25s ease;
  }

  .scene-item:hover .scene-icon {
    background: var(--accent);
    color: #ffffff;
  }

  .scene-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
  }

  .scene-item p {
    font-size: 15px;
    color: var(--muted);
    line-height: 1.75;
  }

  .steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 48px;
  }

  .step-item {
    background: var(--surface);
    border-radius: 20px;
    padding: 32px 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    position: relative;
    transition: all 0.25s ease;
  }

  .step-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
  }

  .step-num {
    width: 44px;
    height: 44px;
    border-radius: 999px;
    background: var(--primary);
    color: #ffffff;
    font-weight: 700;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    box-shadow: 0 6px 14px rgba(46, 95, 138, 0.22);
  }

  .step-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
  }

  .step-item p {
    font-size: 15px;
    color: var(--muted);
    line-height: 1.75;
  }

  .faq-item {
    background: var(--surface);
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    margin-bottom: 14px;
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .faq-item.open {
    border-color: var(--primary-border);
    box-shadow: var(--shadow-lg);
  }

  .faq-q {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    text-align: left;
    transition: background 0.2s ease;
    border-radius: 16px;
  }

  .faq-q:hover {
    background: var(--primary-light);
  }

  .faq-icon {
    font-size: 20px;
    color: var(--accent);
    flex-shrink: 0;
    transition: transform 0.25s ease;
  }

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

  .faq-a {
    max-height: 0;
    overflow: hidden;
    padding: 0 24px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.8;
    transition: max-height 0.3s ease, padding 0.3s ease;
  }

  .faq-item.open .faq-a {
    max-height: 280px;
    padding: 0 24px 22px;
  }

  .cta-section {
    background: linear-gradient(135deg, var(--primary-light), #ffffff 60%, #f0f4f8);
    border-radius: 32px;
    padding: 64px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
  }

  .cta-section::after {
    content: "";
    position: absolute;
    right: -60px;
    top: -60px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(184, 138, 92, 0.18), transparent 70%);
    pointer-events: none;
  }

  .cta-section h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 14px;
  }

  .cta-section p {
    font-size: 16px;
    color: var(--muted);
    max-width: 560px;
    margin: 0 auto 34px;
  }

  .cta-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    justify-content: center;
    max-width: 480px;
    margin: 0 auto;
  }

  .cta-input {
    height: 52px;
    border-radius: 999px;
    border: 1px solid var(--primary-border);
    background: #ffffff;
    padding: 0 22px;
    font-size: 15px;
    color: var(--text);
    width: 100%;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .cta-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(46, 95, 138, 0.12);
  }

  .cta-input::placeholder {
    color: var(--placeholder);
  }

  footer {
    background: var(--primary-dark);
    color: #A8BFD0;
    margin-top: 90px;
  }

  .footer-title {
    font-size: 16px;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 18px;
  }

  .footer-link {
    display: block;
    color: #A8BFD0;
    font-size: 14px;
    line-height: 2.2;
    transition: color 0.2s ease, padding-left 0.2s ease;
  }

  .footer-link:hover {
    color: #ffffff;
    padding-left: 4px;
    text-decoration: underline;
    text-underline-offset: 4px;
  }

  .footer-social {
    width: 40px;
    height: 40px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #A8BFD0;
    font-size: 16px;
    transition: all 0.22s ease;
  }

  .footer-social:hover {
    background: var(--accent);
    color: #ffffff;
    transform: translateY(-2px);
  }

  @media (min-width: 768px) {
    .hero-title {
      font-size: 46px;
    }

    .feature-grid {
      grid-template-columns: 1fr 1fr;
      gap: 64px;
    }

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

    .steps-grid {
      grid-template-columns: repeat(4, 1fr);
    }

    .cta-form {
      flex-direction: row;
    }

    .cta-input {
      width: auto;
      flex: 1;
    }
  }

  @media (min-width: 1024px) {
    .hero-title {
      font-size: 50px;
    }
  }

  @media (max-width: 767px) {
    .hero-section {
      padding: 120px 0 60px;
    }

    .hero-title {
      font-size: 34px;
    }

    .section {
      padding: 60px 0;
    }

    .section-title {
      font-size: 28px;
    }

    .stats-bar {
      padding: 36px 24px;
    }

    .stats-number {
      font-size: 34px;
    }

    .banner {
      min-height: 260px;
    }

    .banner-inner {
      padding: 28px;
    }

    .banner-inner h2 {
      font-size: 22px;
    }

    .cta-section {
      padding: 40px 24px;
    }

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

/* roulang page: article */
:root {
  --primary-600: #2E5F8A;
  --primary-500: #3B6E9B;
  --primary-100: #E4EEF5;
  --primary-50: #F0F6FA;
  --primary-800: #16324A;
  --accent-500: #B88A5C;
  --accent-200: #E9D7C0;
  --bg-body: #F7F9FB;
  --text-700: #1A2D42;
  --text-500: #5B6B7B;
  --text-400: #A0B0BE;
  --border: #E2EAF0;
  --radius-lg: 20px;
  --radius-md: 12px;
  --shadow-sm: 0 4px 20px rgba(30,64,90,0.06);
  --shadow-md: 0 12px 32px rgba(30,64,90,0.10);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC","HarmonyOS Sans","Noto Sans SC","Microsoft YaHei",sans-serif;
  background: var(--bg-body);
  color: var(--text-700);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
.container-page { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
img { max-width: 100%; height: auto; }
a { text-decoration: none; }

.nav-wrap {
  max-width: min(1200px, calc(100vw - 32px));
  margin: 16px auto 0;
  background: rgba(255,255,255,0.70);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-radius: 999px;
  box-shadow: 0 4px 20px rgba(30,64,90,0.08);
  border: 1px solid rgba(255,255,255,0.6);
}
.nav-link {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  color: var(--text-500);
  font-size: 14px; font-weight: 500;
  transition: color 0.2s, background 0.2s;
}
.nav-link::before {
  content: "";
  width: 5px; height: 5px; border-radius: 999px;
  background: var(--primary-600);
  opacity: 0; transform: scale(0);
  transition: all 0.2s;
}
.nav-link:hover { color: var(--primary-600); background: var(--primary-50); }
.nav-link.active { color: var(--primary-600); font-weight: 600; }
.nav-link.active::before { opacity: 1; transform: scale(1); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 24px;
  border-radius: 999px;
  background: var(--primary-600);
  color: #fff;
  font-size: 14px; font-weight: 600;
  transition: background 0.2s, box-shadow 0.2s, transform 0.2s;
}
.nav-cta:hover { background: var(--primary-500); box-shadow: 0 6px 18px rgba(46,95,138,0.28); }
.nav-cta:active { transform: translateY(1px) scale(0.98); }
.nav-cta:focus-visible { outline: 3px solid rgba(184,138,92,0.45); outline-offset: 2px; }

.mobile-menu {
  display: none;
  position: fixed;
  top: 84px; left: 16px; right: 16px;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 24px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  padding: 24px;
  z-index: 100;
}
.mobile-menu.open { display: block; animation: fadeIn 0.2s ease; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}
.mobile-link {
  display: block; padding: 14px 16px;
  border-radius: 14px;
  color: var(--text-500); font-size: 15px; font-weight: 500;
  transition: all 0.2s;
}
.mobile-link:hover, .mobile-link.active { background: var(--primary-50); color: var(--primary-600); }

.breadcrumb {
  font-size: 13px;
  color: var(--text-400);
  display: flex; flex-wrap: wrap; align-items: center;
}
.breadcrumb a { color: var(--text-500); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--primary-600); }
.breadcrumb .sep { margin: 0 10px; color: var(--text-400); }
.breadcrumb .current {
  color: var(--text-400);
  max-width: 280px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

.btn-primary {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 30px;
  border-radius: 999px;
  background: var(--primary-600); color: #fff;
  font-size: 15px; font-weight: 600; line-height: 1.2;
  border: none; cursor: pointer;
  transition: background 0.25s, box-shadow 0.25s, transform 0.2s;
}
.btn-primary:hover { background: var(--primary-500); box-shadow: 0 8px 20px rgba(46,95,138,0.28); transform: translateY(-2px); }
.btn-primary:active { transform: translateY(0) scale(0.98); }
.btn-primary:focus-visible { outline: 3px solid rgba(184,138,92,0.45); outline-offset: 2px; }

.btn-outline {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  border: 2px solid var(--primary-600);
  color: var(--primary-600);
  background: transparent;
  font-size: 15px; font-weight: 600; cursor: pointer;
  transition: background 0.25s, border-color 0.25s, transform 0.2s;
}
.btn-outline:hover { background: var(--primary-50); border-color: var(--primary-500); }
.btn-outline:active { transform: translateY(1px); }
.btn-outline:focus-visible { outline: 3px solid rgba(184,138,92,0.45); outline-offset: 2px; }

.badge { display: inline-flex; align-items: center; padding: 5px 14px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-primary { background: var(--primary-100); color: var(--primary-600); }

.tag {
  display: inline-flex; align-items: center;
  padding: 7px 16px; border-radius: 999px;
  background: var(--primary-50); border: 1px solid var(--border);
  color: var(--text-500); font-size: 13px;
  transition: all 0.2s;
}
.tag:hover { background: var(--primary-100); color: var(--primary-600); border-color: var(--primary-500); }

.article-header h1 { line-height: 1.35; letter-spacing: -0.02em; }
.meta-item { display: inline-flex; align-items: center; }

.article-body { font-size: 17px; line-height: 1.9; color: #2A3D52; }
.article-body > *:first-child { margin-top: 0; }
.article-body h2 { font-size: 26px; font-weight: 700; margin: 36px 0 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); color: var(--text-700); }
.article-body h3 { font-size: 21px; font-weight: 600; margin: 28px 0 14px; color: var(--text-700); }
.article-body p { margin: 18px 0; }
.article-body a { color: var(--primary-600); text-decoration: underline; text-underline-offset: 3px; transition: color 0.2s; }
.article-body a:hover { color: var(--primary-500); }
.article-body img { border-radius: 16px; margin: 24px 0; box-shadow: var(--shadow-sm); }
.article-body blockquote { border-left: 4px solid var(--primary-600); background: var(--primary-50); padding: 16px 22px; border-radius: 0 12px 12px 0; margin: 24px 0; color: var(--text-500); }
.article-body ul, .article-body ol { margin: 18px 0; padding-left: 26px; }
.article-body li { margin: 8px 0; }
.article-body li::marker { color: var(--primary-600); }
.article-body code { background: var(--primary-50); padding: 2px 8px; border-radius: 6px; font-size: 14px; color: var(--primary-600); }
.article-body pre { background: var(--primary-800); color: #E4EEF5; padding: 22px; border-radius: 14px; overflow-x: auto; margin: 24px 0; line-height: 1.7; }
.article-body pre code { background: transparent; color: inherit; padding: 0; }
.article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 12px 16px; text-align: left; }
.article-body th { background: var(--primary-50); color: var(--text-700); font-weight: 600; }

.article-card {
  background: #fff;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }

.cta-input {
  width: 100%; height: 52px;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 0 18px;
  font-size: 15px;
  color: var(--text-700);
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.cta-input::placeholder { color: var(--text-400); }
.cta-input:focus { outline: none; border-color: var(--primary-600); box-shadow: 0 0 0 3px rgba(46,95,138,0.15); }

.footer-title { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; }
.footer-link { display: block; color: #A8BFD0; font-size: 14px; margin-bottom: 10px; transition: all 0.2s; }
.footer-link:hover { color: #fff; text-decoration: underline; text-underline-offset: 3px; }
.footer-social { width: 38px; height: 38px; border-radius: 999px; background: rgba(255,255,255,0.1); display: inline-flex; align-items: center; justify-content: center; color: #A8BFD0; transition: all 0.2s; }
.footer-social:hover { background: var(--accent-500); color: #fff; transform: translateY(-2px); }
.footer-social:focus-visible { outline: 3px solid rgba(184,138,92,0.5); outline-offset: 2px; }

.not-found { text-align: center; padding: 60px 20px; }
.not-found .icon { font-size: 48px; color: var(--text-400); margin-bottom: 16px; }
.not-found h2 { font-size: 24px; font-weight: 700; color: var(--text-700); }
.not-found p { color: var(--text-500); margin-top: 8px; margin-bottom: 24px; }

@media (max-width: 768px) {
  .container-page { padding: 0 16px; }
  .article-body { font-size: 16px; }
  .article-body h2 { font-size: 22px; }
  .article-body h3 { font-size: 19px; }
}
@media (max-width: 520px) {
  .nav-wrap { padding-left: 12px !important; padding-right: 12px !important; }
  .article-header h1 { font-size: 26px; }
  .breadcrumb .current { max-width: 160px; }
}