/* roulang page: index */
:root{
  --ink:#0B1622;--teal:#17B3A3;--teal-dark:#0F8F85;--teal-soft:#E2F6F3;
  --gold:#C9A86A;--gold-soft:#F7F1E3;--bg:#F5F7FA;--card:#fff;--text:#1F2937;--muted:#6B7280;
  --border:#E5E7EB;--shadow:0 10px 34px rgba(15,23,42,.08);
}
*{box-sizing:border-box;scroll-behavior:smooth}body{margin:0;font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;background:var(--bg);color:var(--text);line-height:1.75}
img{max-width:100%;display:block}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.site-header{position:fixed;inset:0 0 auto;z-index:100;padding:18px 0 0;pointer-events:none}
.nav-card{pointer-events:auto;background:rgba(255,255,255,.93);backdrop-filter:blur(18px);border:1px solid rgba(255,255,255,.7);box-shadow:0 14px 48px rgba(11,22,34,.12);border-radius:22px;padding:10px 14px;display:flex;align-items:center;justify-content:space-between;gap:16px;max-width:1200px;margin:0 auto}
.brand-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--ink);white-space:nowrap}
.brand-mark{width:40px;height:40px;border-radius:13px;background:linear-gradient(140deg,#17B3A3,#0B6B78);display:flex;align-items:center;justify-content:center;color:#fff;font-family:'Inter';font-weight:800;font-size:18px}
.nav-links{display:flex;align-items:center;gap:4px}.nav-links a{display:flex;align-items:center;gap:7px;padding:9px 15px;border-radius:12px;font-size:15px;color:var(--text);transition:all .25s}
.nav-links a:hover{background:#F1F4F8;color:var(--teal-dark)}
.nav-links a.active{background:var(--teal-soft);color:#0B7B73;font-weight:600}
.mini-cta{background:var(--teal);color:#fff;border-radius:999px;padding:10px 22px;font-size:14px;font-weight:600;box-shadow:0 8px 18px rgba(23,179,163,.3);transition:all .3s;display:inline-flex;gap:6px;white-space:nowrap}
.mini-cta:hover{background:#21c9b8;transform:translateY(-1px)}
.menu-toggle{display:none;background:#fff;border:1px solid var(--border);border-radius:11px;padding:8px 10px}.mobile-nav{display:none}
@media(max-width:880px){.nav-links,.nav-cta .mini-cta{display:none}.menu-toggle{display:inline-flex}.site-header{padding-top:12px}.nav-card{border-radius:16px;padding:8px 12px}.mobile-nav{display:block;max-height:0;overflow:hidden;transition:max-height .4s;background:#fff;border-radius:18px;margin:8px auto 0;box-shadow:var(--shadow);width:calc(100vw - 34px)}.mobile-nav.open{max-height:420px}.mobile-nav a{display:flex;padding:15px 20px;border-bottom:1px solid var(--border);font-weight:600}}
.cate-hero{background:linear-gradient(100deg,rgba(12,18,30,.94),rgba(24,65,60,.86)),url('/assets/images/backpic/back-3.png') center/cover;color:#fff;padding:175px 0 70px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(201,168,106,.2);border:1px solid rgba(201,168,106,.4);border-radius:999px;padding:6px 15px;font-size:13px;color:#E4C992}
.section-label{display:inline-block;font-size:13px;font-weight:700;letter-spacing:1.2px;color:var(--teal-dark);margin-bottom:10px}
.section-title{font-size:clamp(24px,3vw,31px);font-weight:700;color:var(--ink);margin:0 0 16px;line-height:1.4}
.btn-teal{display:inline-flex;align-items:center;gap:8px;background:var(--teal);color:#fff;border-radius:999px;padding:13px 30px;font-weight:600;font-size:15px;box-shadow:0 10px 24px rgba(23,179,163,.3);transition:all .3s;border:none}
.btn-teal:hover{background:#21c9b8;transform:translateY(-2px)}
.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:12px 28px;font-weight:600;font-size:14px;border:1.5px solid #CBD5E1;transition:all .3s}
.btn-outline:hover{border-color:var(--teal);color:var(--teal-dark);background:var(--teal-soft)}
.guide-card{background:#fff;border:1px solid var(--border);border-radius:20px;padding:32px 30px;height:100%;box-shadow:0 4px 14px rgba(15,23,42,.03);transition:all .3s}
.guide-card:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.guide-num{font-family:'Inter',sans-serif;font-size:13px;font-weight:800;color:var(--gold);background:var(--gold-soft);border-radius:8px;width:34px;height:26px;display:flex;align-items:center;justify-content:center}
.step-arrow{width:44px;height:44px;border-radius:50%;background:var(--teal-soft);color:var(--teal-dark);display:flex;align-items:center;justify-content:center;font-size:18px;flex:none}
.faq-item{border-bottom:1px solid var(--border)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 0;font-size:16px;font-weight:600;color:var(--ink);cursor:pointer}
.faq-icon{width:26px;height:26px;flex:none;position:relative;transition:transform .3s}
.faq-icon:before,.faq-icon:after{content:"";position:absolute;background:var(--teal);border-radius:2px}
.faq-icon:before{width:14px;height:2px;top:11px;left:6px}.faq-icon:after{width:2px;height:14px;top:5px;left:12px}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;opacity:0;overflow:hidden;transition:all .3s}
.faq-item.open .faq-a{max-height:420px;opacity:1;margin-bottom:8px}
.faq-a-inner{padding:0 26px 22px 0;color:var(--muted);font-size:14.5px;line-height:1.9}
.footer{background:#0B1622;color:#B6C0D0;padding:68px 0 0;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:44px}@media(max-width:880px){.footer-grid{grid-template-columns:1fr 1fr;gap:26px}}@media(max-width:520px){.footer-grid{grid-template-columns:1fr}}
.foot-title{font-size:13px;letter-spacing:2px;font-weight:700;color:#fff;margin-bottom:18px}
.footer a{color:#B6C0D0;display:block;font-size:14px;padding:3px 0;transition:all .25s}.footer a:hover{color:#17B3A3;padding-left:4px}
.footer-copy{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:50px;border-top:1px solid rgba(255,255,255,.09);padding:22px 0;font-size:13px}
a:focus-visible,button:focus-visible{outline:3px solid rgba(23,179,163,.45);outline-offset:2px}

/* roulang page: category1 */
:root {
    --bg: #F7F8FA;
    --surface: #FFFFFF;
    --ink: #1F2937;
    --muted: #6B7280;
    --line: #E5E7EB;
    --deep: #0F1A2C;
    --deep-2: #111827;
    --accent: #10B0A0;
    --accent-strong: #0C9185;
    --gold: #C9A96A;
    --shadow: 0 10px 30px rgba(15, 26, 44, 0.07);
    --shadow-lg: 0 22px 60px rgba(15, 26, 44, 0.14);
    --radius: 16px;
    --radius-lg: 24px;
    --font: -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    background: var(--bg);
    color: var(--ink);
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

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

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

  ul, ol {
    list-style: none;
  }

  button {
    font-family: inherit;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 80;
    padding: 14px 0 10px;
    background: linear-gradient(180deg, rgba(247, 248, 250, 0.95) 0%, rgba(247, 248, 250, 0.72) 100%);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }

  .nav-panel {
    display: flex;
    align-items: center;
    gap: 18px;
    background: var(--surface);
    border: 1px solid rgba(229, 231, 235, 0.9);
    box-shadow: var(--shadow);
    border-radius: 999px;
    padding: 10px 12px 10px 18px;
  }

  .brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--deep);
    font-size: 20px;
    font-weight: 800;
    line-height: 1.2;
    white-space: nowrap;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    flex: 0 0 36px;
    border-radius: 11px;
    background: var(--deep);
    color: var(--accent);
    display: grid;
    place-items: center;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.02em;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: auto;
  }

  .nav-links a {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 15px;
    border-radius: 999px;
    color: #3D4755;
    font-size: 14.5px;
    font-weight: 500;
    transition: all 0.25s ease;
  }

  .nav-links a:hover {
    background: #F0F2F5;
    color: var(--deep);
  }

  .nav-links a.active {
    background: var(--deep);
    color: #FFFFFF;
    box-shadow: 0 6px 18px rgba(15, 26, 44, 0.18);
  }

  .nav-links a svg {
    transition: transform 0.25s ease;
  }

  .nav-links a:hover svg {
    transform: translateY(-1px);
  }

  .nav-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 20px;
    border-radius: 999px;
    background: var(--accent);
    color: #FFFFFF;
    font-size: 14px;
    font-weight: 700;
    white-space: nowrap;
    transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
  }

  .nav-action:hover {
    background: var(--accent-strong);
    box-shadow: 0 8px 20px rgba(16, 176, 160, 0.28);
    transform: translateY(-1px);
  }

  .nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--deep);
    color: #fff;
    border: 0;
    cursor: pointer;
  }

  .mobile-nav {
    display: none;
    background: #fff;
    border-radius: 18px;
    margin-top: 12px;
    padding: 16px;
    box-shadow: var(--shadow-lg);
  }

  .mobile-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 13px 10px;
    border-radius: 12px;
    font-weight: 600;
    color: var(--ink);
    border-bottom: 1px solid #F2F3F5;
  }

  .mobile-nav a:last-child {
    border-bottom: 0;
  }

  .mobile-nav a.active {
    color: var(--accent-strong);
    background: #E8FBF8;
  }

  .page-hero {
    position: relative;
    isolation: isolate;
    border-radius: 0 0 36px 36px;
    overflow: hidden;
  }

  .page-hero .hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    z-index: -2;
  }

  .page-hero .hero-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(94deg, rgba(15, 26, 44, 0.94) 18%, rgba(15, 26, 44, 0.72) 60%, rgba(10, 26, 40, 0.34) 100%);
    z-index: -1;
  }

  .hero-content {
    position: relative;
    color: #fff;
    padding: 112px 0 112px;
    max-width: 820px;
  }

  .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.16);
    color: rgba(255, 255, 255, 0.88);
    font-size: 13px;
    font-weight: 500;
    padding: 7px 15px;
    border-radius: 999px;
    margin-bottom: 24px;
    backdrop-filter: blur(6px);
  }

  .hero-tag .dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--gold);
  }

  .hero-content h1 {
    font-size: 46px;
    line-height: 1.24;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 22px;
  }

  .hero-content .hero-sub {
    color: rgba(231, 235, 242, 0.84);
    font-size: 16.5px;
    line-height: 1.85;
    max-width: 650px;
    margin-bottom: 30px;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 700;
    border: 0;
    cursor: pointer;
    transition: all 0.25s ease;
  }

  .btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 8px 24px rgba(16, 176, 160, 0.26);
  }

  .btn-primary:hover {
    background: #24C2B2;
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(16, 176, 160, 0.36);
  }

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

  .btn-ghost {
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, 0.55);
  }

  .btn-ghost:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: #fff;
  }

  .btn-dark {
    background: var(--deep);
    color: #fff;
  }

  .btn-dark:hover {
    background: #16283D;
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(15, 26, 44, 0.18);
  }

  .section {
    padding: 96px 0;
  }

  .section-sm {
    padding: 72px 0;
  }

  .section-white {
    background: #fff;
  }

  .section-head {
    max-width: 720px;
    margin-bottom: 48px;
  }

  .section-head.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
  }

  .eyebrow {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--accent-strong);
    background: rgba(16, 176, 160, 0.1);
    border-radius: 999px;
    padding: 7px 14px;
    margin-bottom: 14px;
  }

  .section-title {
    font-size: 32px;
    font-weight: 800;
    line-height: 1.32;
    color: var(--deep);
    letter-spacing: -0.02em;
    margin-bottom: 14px;
  }

  .section-sub {
    font-size: 16px;
    color: var(--muted);
    line-height: 1.8;
  }

  .overview-wrap {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 32px;
    align-items: stretch;
  }

  .overview-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 42px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(229, 231, 235, 0.7);
    position: relative;
    overflow: hidden;
  }

  .overview-card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--accent) 0%, var(--gold) 100%);
  }

  .overview-card p {
    color: #4B5563;
    margin-bottom: 18px;
    font-size: 15.5px;
  }

  .check-list {
    display: grid;
    gap: 12px;
    margin-top: 22px;
  }

  .check-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 15px;
    color: var(--ink);
  }

  .check-list .list-ico {
    flex: 0 0 20px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(16, 176, 160, 0.14);
    color: var(--accent-strong);
    display: grid;
    place-items: center;
    margin-top: 4px;
  }

  .mini-panel {
    background: linear-gradient(158deg, #13263F 0%, #0F1A2C 100%);
    border-radius: var(--radius-lg);
    color: #fff;
    padding: 38px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: 0 24px 50px rgba(15, 26, 44, 0.2);
    position: relative;
    overflow: hidden;
  }

  .mini-panel::after {
    content: "";
    position: absolute;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    right: -50px;
    top: -60px;
    background: radial-gradient(circle, rgba(16, 176, 160, 0.4), transparent 68%);
  }

  .mini-panel .mini-title {
    font-size: 22px;
    font-weight: 800;
    line-height: 1.45;
    margin-bottom: 16px;
  }

  .mini-panel .mini-desc {
    color: #B7C1CF;
    font-size: 14.5px;
    line-height: 1.8;
  }

  .mini-panel .gold-line {
    width: 46px;
    height: 3px;
    background: var(--gold);
    border-radius: 999px;
    margin-bottom: 20px;
  }

  .feature-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .feature-entry {
    background: #fff;
    border-radius: var(--radius);
    padding: 34px;
    border: 1px solid #EEF0F3;
    box-shadow: 0 6px 18px rgba(15, 26, 44, 0.04);
    transition: transform 0.28s ease, box-shadow 0.28s ease;
    display: flex;
    flex-direction: column;
    gap: 14px;
    position: relative;
    overflow: hidden;
  }

  .feature-entry:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(15, 26, 44, 0.1);
  }

  .feature-num {
    font-family: "Inter", "SF Pro Display", sans-serif;
    font-size: 44px;
    font-weight: 800;
    color: #EEF3F7;
    position: absolute;
    right: 22px;
    top: 16px;
    line-height: 1;
    letter-spacing: -0.03em;
  }

  .feature-entry .f-icon {
    width: 48px;
    height: 48px;
    border-radius: 13px;
    background: var(--deep);
    color: var(--accent);
    display: grid;
    place-items: center;
    margin-bottom: 4px;
  }

  .feature-entry h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--deep);
  }

  .feature-entry p {
    color: var(--muted);
    font-size: 15px;
    line-height: 1.8;
  }

  .feature-entry .tag {
    width: fit-content;
    background: #F0F1F4;
    color: #3D4755;
    border-radius: 8px;
    padding: 4px 10px;
    font-size: 12.5px;
    font-weight: 500;
  }

  .step-content {
    display: grid;
    grid-template-columns: 0.92fr 1.08fr;
    gap: 54px;
    align-items: center;
  }

  .step-visual {
    background: var(--deep);
    border-radius: var(--radius-lg);
    padding: 28px;
    color: #fff;
    box-shadow: var(--shadow-lg);
    min-height: 360px;
    display: flex;
    align-items: flex-end;
    background-image: linear-gradient(rgba(15, 26, 44, 0.78), rgba(15, 26, 44, 0.82)), url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
  }

  .step-visual .visual-msg {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px 22px;
    border-radius: 16px;
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255, 255, 255, 0.14);
  }

  .visual-msg strong {
    display: block;
    margin-bottom: 4px;
    color: #fff;
    font-size: 16px;
  }

  .visual-msg span {
    color: rgba(255, 255, 255, 0.72);
    font-size: 13px;
  }

  .steps-list {
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .step-item {
    display: flex;
    gap: 18px;
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
    position: relative;
  }

  .step-item:last-child {
    border-bottom: 0;
  }

  .step-index {
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    border-radius: 50%;
    background: var(--deep);
    color: var(--accent);
    display: grid;
    place-items: center;
    font-size: 18px;
    font-weight: 700;
    box-shadow: inset 0 0 0 1px rgba(16, 176, 160, 0.4);
  }

  .step-item h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--deep);
  }

  .step-item p {
    font-size: 14.5px;
    line-height: 1.75;
    color: var(--muted);
  }

  .scene-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }

  .scene-card {
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 26px 22px;
    color: var(--ink);
    transition: all 0.28s ease;
  }

  .scene-card:hover {
    background: #fff;
    border-color: transparent;
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
  }

  .scene-card .s-ico {
    width: 44px;
    height: 44px;
    margin-bottom: 18px;
    border-radius: 13px;
    background: rgba(16, 176, 160, 0.1);
    color: var(--accent-strong);
    display: grid;
    place-items: center;
    transition: background 0.26s ease;
  }

  .scene-card:hover .s-ico {
    background: var(--accent);
    color: #fff;
  }

  .scene-card h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .scene-card p {
    font-size: 13.8px;
    line-height: 1.75;
    color: var(--muted);
  }

  .compare-grid {
    display: grid;
    grid-template-columns: 0.9fr 0.2fr 1.1fr;
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid #EEF0F3;
  }

  .compare-col {
    padding: 38px;
  }

  .compare-col.dark {
    background: var(--deep);
    color: #fff;
  }

  .compare-col h3 {
    font-size: 22px;
    font-weight: 800;
    margin-bottom: 24px;
  }

  .compare-list li {
    display: flex;
    align-items: flex-start;
    gap: 11px;
    margin-bottom: 17px;
    font-size: 14.5px;
    line-height: 1.7;
    color: #4B555F;
  }

  .compare-col.dark .compare-list li {
    color: rgba(255, 255, 255, 0.76);
  }

  .compare-ico {
    flex: 0 0 20px;
    width: 20px;
    height: 20px;
    margin-top: 4px;
    border-radius: 50%;
    background: #EEF0F3;
    color: #9CA3AF;
    display: grid;
    place-items: center;
    font-size: 12px;
  }

  .compare-col.good .compare-ico {
    background: rgba(16, 176, 160, 0.14);
    color: var(--accent-strong);
  }

  .compare-col.dark .compare-ico {
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.6);
  }

  .faq-list {
    max-width: 820px;
    margin: 0 auto;
    padding: 8px 28px;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid #EEF0F3;
  }

  .faq-item {
    border-bottom: 1px solid #ECEEF2;
  }

  .faq-item:last-child {
    border-bottom: 0;
  }

  .faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    list-style: none;
    padding: 22px 4px;
    cursor: pointer;
    font-weight: 600;
    font-size: 16px;
    color: var(--ink);
    transition: color 0.22s ease;
  }

  .faq-item summary::-webkit-details-marker {
    display: none;
  }

  .faq-item summary:hover {
    color: var(--accent-strong);
  }

  .faq-item summary::after {
    content: "";
    width: 10px;
    height: 10px;
    flex: 0 0 10px;
    border-right: 1.8px solid #9CA3AF;
    border-bottom: 1.8px solid #9CA3AF;
    transform: rotate(45deg);
    transition: transform 0.28s ease;
  }

  .faq-item[open] summary::after {
    transform: rotate(225deg);
    border-color: var(--accent-strong);
  }

  .faq-item p {
    padding: 0 4px 24px;
    color: var(--muted);
    font-size: 14.5px;
    line-height: 1.85;
  }

  .cta-block {
    position: relative;
    border-radius: 32px;
    overflow: hidden;
    background: var(--deep);
    background-image: linear-gradient(105deg, rgba(15, 26, 44, 0.96) 10%, rgba(15, 26, 44, 0.74) 100%), url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    padding: 70px 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    color: #fff;
  }

  .cta-content h2 {
    font-size: 30px;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
  }

  .cta-content p {
    color: rgba(255, 255, 255, 0.72);
    font-size: 15.5px;
    max-width: 560px;
  }

  .footer {
    background: var(--deep);
    color: rgba(255, 255, 255, 0.68);
    margin-top: 96px;
    padding: 76px 0 34px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.35fr 0.8fr 0.9fr 0.9fr;
    gap: 44px;
    padding-bottom: 44px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .footer .brand-logo {
    color: #fff;
    font-size: 20px;
    margin-bottom: 14px;
  }

  .footer p {
    max-width: 300px;
    font-size: 14px;
    line-height: 1.9;
  }

  .foot-title {
    color: #fff;
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 18px;
  }

  .footer a {
    display: block;
    color: rgba(255, 255, 255, 0.62);
    font-size: 14px;
    padding: 5px 0;
    transition: all 0.22s ease;
  }

  .footer a:hover {
    color: var(--accent);
    transform: translateX(2px);
  }

  .footer-copy {
    padding-top: 28px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
  }

  @media (max-width: 1024px) {
    .scene-grid {
      grid-template-columns: repeat(2, 1fr);
    }

    .overview-wrap {
      grid-template-columns: 1fr;
    }

    .step-content {
      grid-template-columns: 1fr;
      gap: 36px;
    }

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

    .hero-content h1 {
      font-size: 40px;
    }

    .cta-block {
      flex-direction: column;
      align-items: flex-start;
      padding: 52px 36px;
    }
  }

  @media (max-width: 860px) {
    .nav-links {
      display: none;
    }

    .nav-toggle {
      display: inline-flex;
      margin-left: auto;
    }

    .mobile-nav.open {
      display: block;
    }

    .nav-action {
      display: none;
    }

    .section {
      padding: 72px 0;
    }

    .feature-split {
      grid-template-columns: 1fr;
    }

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

    .compare-col.dark {
      background: var(--deep);
    }

    .hero-content {
      padding: 84px 0;
    }

    .hero-content h1 {
      font-size: 32px;
    }
  }

  @media (max-width: 600px) {
    .container {
      padding: 0 16px;
    }

    .nav-panel {
      padding-left: 15px;
    }

    .brand-logo {
      font-size: 18px;
    }

    .brand-mark {
      width: 32px;
      height: 32px;
      flex-basis: 32px;
    }

    .hero-content h1 {
      font-size: 28px;
    }

    .hero-content .hero-sub {
      font-size: 15px;
    }

    .section-title {
      font-size: 26px;
    }

    .overview-card,
    .mini-panel,
    .feature-entry {
      padding: 26px;
    }

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

    .cta-block {
      border-radius: 22px;
      padding: 38px 24px;
    }

    .cta-content h2 {
      font-size: 24px;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }

    .faq-list {
      padding: 4px 18px 12px;
    }

    .faq-item summary {
      font-size: 15px;
      padding: 18px 0;
    }

    .site-header {
      padding-top: 10px;
    }
  }

/* roulang page: article */
:root{
  --primary:#0F1A2C;
  --primary-soft:#111827;
  --accent:#12B3A8;
  --accent-deep:#0E9C93;
  --accent-soft:#E4F6F4;
  --gold:#C9A96A;
  --bg:#F6F7F9;
  --card:#FFFFFF;
  --text:#1F2937;
  --muted:#6B7280;
  --line:#E5E7EB;
  --footer-text:#9AA8B8;
  --radius:16px;
  --radius-lg:28px;
  --shadow-sm:0 6px 20px rgba(15,26,44,.05);
  --shadow-lg:0 18px 45px rgba(15,26,44,.12);
}

html {
  scroll-behavior:smooth;
}

html body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.75;
  font-size:16px;
  margin:0;
  padding:0;
  -webkit-font-smoothing:antialiased;
}

*{
  box-sizing:border-box;
}
img{
  display:block;
  max-width:100%;
}
a{
  text-decoration:none;
  color:inherit;
}
button{
  font-family:inherit;
  cursor:pointer;
}

.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding-left:24px;
  padding-right:24px;
}

/* ===== header ===== */
.site-header{
  position:sticky;
  top:16px;
  z-index:60;
  padding:0;
}
.header-shell{
  max-width:1280px;
  margin:0 auto;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.7);
  border-radius:24px;
  box-shadow:0 18px 44px rgba(15,26,44,.1);
  padding:12px 18px 12px 22px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.header-left{
  display:flex;
  align-items:center;
  min-width:0;
}
.brand-logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--primary);
  font-size:20px;
  font-weight:800;
  letter-spacing:.01em;
  white-space:nowrap;
}
.brand-mark{
  width:38px;
  height:38px;
  border-radius:13px;
  background:linear-gradient(135deg,var(--accent) 0%,var(--primary) 120%);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:15px;
  font-weight:900;
  letter-spacing:-.02em;
  box-shadow:0 8px 18px rgba(18,179,168,.3);
  flex:0 0 auto;
}
.nav-links{
  display:flex;
  align-items:center;
  gap:6px;
}
.nav-links a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  font-weight:500;
  color:#39424E;
  padding:9px 16px;
  border-radius:999px;
  transition:all .28s ease;
  white-space:nowrap;
}
.nav-links a:hover{
  background:#F3F4F6;
  color:var(--accent-deep);
}
.nav-links a.active{
  background:var(--accent-soft);
  color:var(--accent-deep);
  font-weight:700;
}
.nav-links a svg{
  opacity:.85;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:10px;
}
.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  background:var(--accent);
  color:#fff;
  font-size:15px;
  font-weight:700;
  border:none;
  border-radius:999px;
  padding:11px 24px;
  box-shadow:0 10px 26px rgba(18,179,168,.28);
  transition:all .28s ease;
  white-space:nowrap;
}
.btn-primary:hover{
  background:#10BFB3;
  transform:translateY(-1px);
  box-shadow:0 14px 32px rgba(18,179,168,.35);
}
.btn-primary:active{
  transform:translateY(0);
  box-shadow:0 6px 16px rgba(18,179,168,.25);
}
.btn-light{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  background:#fff;
  color:var(--primary);
  border:none;
  font-size:15px;
  font-weight:700;
  padding:11px 26px;
  border-radius:999px;
  box-shadow:0 8px 22px rgba(0,0,0,.12);
  transition:all .28s ease;
  white-space:nowrap;
}
.btn-light:hover{
  background:#F9FAFB;
  transform:translateY(-1px);
}
.nav-toggle{
  display:none;
  width:42px;
  height:42px;
  border:1px solid var(--line);
  border-radius:14px;
  background:#fff;
  align-items:center;
  justify-content:center;
  color:var(--primary);
  transition:border-color .2s ease;
}
.nav-toggle:hover{
  border-color:var(--accent);
  color:var(--accent-deep);
}

/* ===== article hero ===== */
.article-hero{
  max-width:1280px;
  margin:30px auto 0;
  position:relative;
  overflow:hidden;
  border-radius:36px;
  background:linear-gradient(110deg,rgba(10,20,35,.95) 0%,rgba(15,26,44,.88) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color:#fff;
  padding:76px 40px 68px;
}
.article-hero::after{
  content:'';
  position:absolute;
  right:-120px;
  top:-120px;
  width:300px;
  height:300px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(18,179,168,.28) 0%,rgba(18,179,168,0) 72%);
  pointer-events:none;
}
.article-hero-inner{
  position:relative;
  z-index:2;
  max-width:980px;
}
.article-hero-kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--gold);
  font-size:14px;
  font-weight:600;
  letter-spacing:.16em;
  margin-bottom:16px;
  padding-left:16px;
  position:relative;
}
.article-hero-kicker::before{
  content:'';
  width:7px;
  height:7px;
  border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 0 5px rgba(18,179,168,.2);
}
.article-title{
  font-size:clamp(30px,5vw,46px);
  font-weight:800;
  line-height:1.3;
  letter-spacing:-.01em;
  color:#fff;
}
.article-title .hero-kicker{
  display:block;
  font-size:14px;
  font-weight:600;
  letter-spacing:.2em;
  color:var(--gold);
  margin-bottom:16px;
}
.article-title .headline-main{
  display:block;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:12px 22px;
  margin-top:30px;
  font-size:14px;
  color:rgba(255,255,255,.72);
}
.meta-item{
  display:inline-flex;
  align-items:center;
  gap:8px;
  line-height:1;
}
.meta-item svg{
  width:16px;
  height:16px;
  opacity:.75;
}
.article-category-btn{
  display:inline-flex;
  align-items:center;
  background:rgba(18,179,168,.18);
  color:#65E0D6;
  border:1px solid rgba(18,179,168,.45);
  border-radius:999px;
  padding:5px 14px;
  font-size:13px;
  font-weight:600;
  transition:all .2s ease;
}
.article-category-btn:hover{
  background:rgba(18,179,168,.3);
}

/* ===== breadcrumb ===== */
.breadcrumb-zone{
  max-width:980px;
  margin:32px auto 0;
  padding:0 24px;
  font-size:13px;
  color:var(--muted);
}
.breadcrumb-zone a{
  color:var(--muted);
  transition:color .2s ease;
}
.breadcrumb-zone a:hover{
  color:var(--accent-deep);
}
.breadcrumb-current{
  margin-left:4px;
  display:inline-block;
  max-width:280px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  vertical-align:bottom;
}

/* ===== article body ===== */
.article-page-wrap{
  padding:0 24px;
}
.article-main{
  max-width:960px;
  margin:0 auto;
}
.article-content-card{
  background:var(--card);
  border-radius:24px;
  box-shadow:var(--shadow-sm);
  padding:58px 68px 52px;
  margin-top:48px;
}
.article-prose{
  max-width:780px;
  margin:0 auto;
}
.article-prose p{
  font-size:17px;
  line-height:1.95;
  margin:0 0 1.6em;
  color:#232E3C;
}
.article-prose h2{
  font-size:28px;
  font-weight:800;
  color:var(--primary);
  margin:2em 0 .8em;
  letter-spacing:-.01em;
  line-height:1.4;
}
.article-prose h3{
  font-size:22px;
  font-weight:700;
  color:var(--primary);
  margin:1.8em 0 .7em;
  line-height:1.5;
}
.article-prose ul,
.article-prose ol{
  margin:0 0 1.7em;
  padding-left:1.4em;
}
.article-prose li{
  margin-bottom:.6em;
  font-size:16.5px;
  line-height:1.85;
}
.article-prose blockquote{
  margin:2em 0;
  padding:22px 28px;
  border-left:4px solid var(--accent);
  background:#F0FBF8;
  border-radius:0 18px 18px 0;
  color:#27404C;
  font-size:16px;
  line-height:1.8;
}
.article-prose img{
  border-radius:18px;
  box-shadow:var(--shadow-sm);
  margin:2em auto;
}
.article-prose a{
  color:var(--accent-deep);
  font-weight:600;
  border-bottom:1px solid rgba(18,179,168,.45);
  transition:border-color .2s ease;
}
.article-prose a:hover{
  border-bottom-color:var(--accent-deep);
}
.article-prose hr{
  border:none;
  border-top:1px solid var(--line);
  margin:3.2em 0;
}
.article-prose strong{
  color:var(--primary);
  font-weight:700;
}

/* article lower */
.article-tag-row{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:46px;
}
.tag-chip{
  display:inline-flex;
  align-items:center;
  background:#F2F4F7;
  color:#4B5563;
  border-radius:8px;
  font-size:13px;
  font-weight:600;
  padding:6px 14px;
  transition:all .22s ease;
}
.tag-chip:hover{
  background:var(--accent-soft);
  color:var(--accent-deep);
}
.article-nav-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  max-width:780px;
  margin:44px auto 0;
}
.article-nav-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  background:#FAFBFC;
  border:1px solid #EDEFF3;
  border-radius:18px;
  color:var(--primary);
  font-size:15px;
  font-weight:600;
  padding:16px 20px;
  transition:all .25s ease;
}
.article-nav-link:hover{
  border-color:var(--accent);
  background:#fff;
  box-shadow:var(--shadow-sm);
  color:var(--accent-deep);
  transform:translateY(-1px);
}

/* related cards */
.related-section{
  max-width:1280px;
  margin:100px auto 0;
  padding:0 24px;
}
.section-head{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:18px;
  margin-bottom:34px;
}
.section-label{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:#EDF9F7;
  color:var(--accent-deep);
  border-radius:999px;
  font-size:13px;
  font-weight:700;
  padding:6px 15px;
  letter-spacing:.04em;
}
.section-title{
  font-size:32px;
  font-weight:800;
  color:var(--primary);
  line-height:1.3;
  margin-top:14px;
}
.section-link{
  color:var(--muted);
  font-size:14px;
  font-weight:600;
  transition:color .2s ease;
  white-space:nowrap;
}
.section-link:hover{
  color:var(--accent-deep);
}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.related-card{
  display:block;
  background:#fff;
  border-radius:22px;
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:box-shadow .3s ease,transform .3s ease;
}
.related-card:hover{
  box-shadow:var(--shadow-lg);
  transform:translateY(-4px);
}
.related-media{
  aspect-ratio:16/10;
  overflow:hidden;
  position:relative;
  background:#E8EBEF;
}
.related-media img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}
.related-card:hover .related-media img{
  transform:scale(1.04);
}
.related-body{
  padding:20px 22px 24px;
}
.related-type{
  display:inline-flex;
  color:var(--accent-deep);
  background:var(--accent-soft);
  border-radius:6px;
  font-size:12px;
  font-weight:700;
  padding:4px 10px;
  margin-bottom:10px;
}
.related-title{
  font-size:17px;
  font-weight:700;
  line-height:1.5;
  color:var(--primary);
  margin-bottom:8px;
}
.related-desc{
  font-size:14px;
  color:var(--muted);
  line-height:1.7;
  margin-bottom:14px;
}
.related-more{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--accent-deep);
  font-size:14px;
  font-weight:700;
  transition:gap .2s ease;
}
.related-card:hover .related-more{
  gap:10px;
}

/* not found */
.not-found-card{
  background:#fff;
  border-radius:24px;
  box-shadow:var(--shadow-sm);
  text-align:center;
  padding:80px 30px;
  margin-top:44px;
  max-width:960px;
}
.not-found-card h2{
  font-size:44px;
  font-weight:800;
  color:var(--primary);
  margin:0;
}
.not-found-card p{
  color:var(--muted);
  margin:18px 0 30px;
}
.btn-dark{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:var(--primary);
  color:#fff;
  border-radius:999px;
  font-weight:700;
  padding:12px 32px;
  transition:all .28s ease;
}
.btn-dark:hover{
  background:#17273E;
  transform:translateY(-1px);
  box-shadow:0 14px 30px rgba(15,26,44,.22);
}

/* ===== CTA ===== */
.cta-zone{
  max-width:1280px;
  margin:100px auto 0;
  padding:0 24px;
}
.cta-panel{
  position:relative;
  border-radius:32px;
  overflow:hidden;
  background:linear-gradient(105deg,rgba(10,18,32,.97),rgba(15,26,44,.86)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  padding:60px 60px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:36px;
  color:#fff;
}
.cta-panel::after{
  content:'';
  position:absolute;
  right:-60px;
  bottom:-80px;
  width:230px;
  height:230px;
  background:radial-gradient(circle,rgba(18,179,168,.25),rgba(18,179,168,0) 70%);
  pointer-events:none;
}
.cta-text{
  position:relative;
  z-index:2;
}
.cta-text h2{
  font-size:clamp(25px,3.6vw,34px);
  font-weight:800;
  margin:0 0 10px;
  line-height:1.35;
}
.cta-text p{
  color:rgba(255,255,255,.7);
  font-size:15px;
  margin:0;
}
.cta-action{
  position:relative;
  z-index:2;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:9px;
  flex:0 0 auto;
}
.cta-note{
  color:rgba(255,255,255,.62);
  font-size:13px;
}

/* ===== footer ===== */
.footer{
  margin-top:100px;
  background:var(--primary);
  color:#AAB6C5;
  font-size:14px;
}
.footer .footer-inner{
  max-width:1280px;
  margin:0 auto;
  padding:70px 24px 28px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr .9fr .9fr 1fr;
  gap:44px;
}
.footer .brand-logo{
  color:#fff;
  font-size:20px;
}
.footer .brand-mark{
  background:linear-gradient(135deg,var(--accent),#56D6CB);
}
.footer p{
  font-size:14px;
  line-height:1.9;
  margin:16px 0 0;
  color:#A2AFC0;
}
.foot-title{
  color:#fff;
  font-weight:700;
  font-size:16px;
  margin-bottom:16px;
  position:relative;
  padding-bottom:10px;
}
.foot-title::after{
  content:'';
  width:22px;
  height:2px;
  background:var(--accent);
  border-radius:2px;
  position:absolute;
  left:0;
  bottom:0;
}
.footer-grid a{
  display:block;
  padding:5px 0;
  color:#A2AFC0;
  transition:color .2s ease;
}
.footer-grid a:hover{
  color:var(--accent);
}
.footer-grid span{
  display:block;
  font-size:14px;
  padding:4px 0;
  color:#A2AFC0;
}
.footer-copy{
  border-top:1px solid rgba(255,255,255,.08);
  margin-top:48px;
  padding-top:24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  color:#7D8A9C;
  font-size:13px;
}

/* ===== responsive ===== */
@media (max-width:1023px){
  .nav-links{
    position:absolute;
    top:calc(100% + 12px);
    left:20px;
    right:20px;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    background:#fff;
    border:1px solid rgba(255,255,255,.7);
    border-radius:24px;
    box-shadow:var(--shadow-lg);
    padding:16px;
    display:none;
  }
  .nav-links a{
    padding:13px 18px;
    border-radius:14px;
  }
  .site-header.nav-open .nav-links{
    display:flex;
  }
  .nav-toggle{
    display:inline-flex;
  }
  .header-actions .btn-primary{
    display:none;
  }
}

@media (min-width:1024px){
  .nav-links{
    display:flex !important;
  }
}

@media (max-width:767px){
  html body{
    font-size:15.5px;
  }
  .header-shell{
    padding:10px 14px;
    border-radius:20px;
  }
  .brand-logo{
    font-size:18px;
  }
  .article-hero{
    margin-top:16px;
    border-radius:24px;
    padding:50px 24px 44px;
  }
  .article-title{
    font-size:28px;
    line-height:1.35;
  }
  .article-title .hero-kicker{
    font-size:12px;
  }
  .article-meta{
    gap:12px 14px;
    font-size:13px;
  }
  .breadcrumb-zone{
    padding:0 15px;
  }
  .article-page-wrap{
    padding:0 15px;
  }
  .article-content-card{
    padding:30px 20px 26px;
    border-radius:20px;
    margin-top:28px;
  }
  .article-prose p{
    font-size:16px;
    line-height:1.85;
  }
  .article-prose h2{
    font-size:23px;
  }
  .article-prose h3{
    font-size:19px;
  }
  .article-nav-grid{
    grid-template-columns:1fr;
  }
  .section-title{
    font-size:25px;
  }
  .related-grid{
    grid-template-columns:1fr;
  }
  .related-media{
    aspect-ratio:16/8;
  }
  .cta-panel{
    flex-direction:column;
    align-items:flex-start;
    padding:36px 24px;
    border-radius:24px;
  }
  .cta-action{
    width:100%;
    flex-direction:row;
    flex-wrap:wrap;
  }
  .cta-action .btn-light{
    width:100%;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:30px;
  }
  .footer .footer-inner{
    padding-top:48px;
  }
  .footer-copy{
    flex-direction:column;
    align-items:flex-start;
  }
}

/* roulang page: category2 */
:root {
      --ink: #0F1A2C;
      --teal: #12B3A8;
      --teal-dark: #0E9489;
      --teal-light: #E7FBFA;
      --gold: #C9A96A;
      --bg: #F5F7FA;
      --white: #FFFFFF;
      --text: #1F2937;
      --muted: #6B7280;
      --border: #E5E7EB;
      --shadow-sm: 0 6px 22px rgba(15, 26, 44, 0.06);
      --shadow-lg: 0 20px 55px rgba(15, 26, 44, 0.14);
      --radius-card: 20px;
      --radius-pill: 9999px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.75;
      font-size: 16px;
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: color .2s ease, background .2s ease, box-shadow .2s ease, transform .2s ease, border-color .2s ease;
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    .container-x {
      max-width: 1240px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .content-section {
      padding: 110px 0;
    }

    .section-head {
      max-width: 820px;
      margin: 0 auto 52px;
      text-align: center;
    }

    .section-head.left {
      margin-left: 0;
      text-align: left;
    }

    .eyebrow {
      display: block;
      font-size: 13px;
      font-weight: 800;
      letter-spacing: 3px;
      text-transform: uppercase;
      color: var(--teal-dark);
      margin-bottom: 14px;
    }

    .section-head h2,
    .block-title {
      margin: 0 0 18px;
      font-size: clamp(28px, 3vw, 36px);
      line-height: 1.28;
      letter-spacing: -0.5px;
      color: var(--ink);
      font-weight: 800;
    }

    .section-head p,
    .block-desc {
      font-size: 17px;
      line-height: 1.85;
      color: var(--muted);
      margin: 0;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      padding: 0 30px;
      height: 50px;
      border-radius: 46px;
      border: 1.5px solid transparent;
      font-size: 15px;
      font-weight: 700;
      line-height: 1;
      white-space: nowrap;
      transition: all .25s ease;
      box-shadow: 0 4px 10px rgba(15, 26, 44, 0.04);
    }

    .btn:hover {
      transform: translateY(-1px);
    }

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

    .btn:focus-visible,
    .faq-q:focus-visible,
    .nav-toggle:focus-visible {
      outline: 3px solid rgba(18, 179, 168, .35);
      outline-offset: 3px;
    }

    .btn-solid {
      background: var(--teal);
      color: #FFFFFF;
    }

    .btn-solid:hover {
      background: var(--teal-dark);
      box-shadow: 0 12px 25px rgba(18, 179, 168, .32);
    }

    .btn-white {
      background: #fff;
      color: var(--ink);
      border-color: #fff;
    }

    .btn-white:hover {
      background: #F2FDFC;
      border-color: var(--teal);
      box-shadow: 0 12px 28px rgba(0, 0, 0, .18);
    }

    .btn-line-light {
      background: transparent;
      color: #F4F8FB;
      border-color: rgba(255, 255, 255, .7);
      box-shadow: none;
    }

    .btn-line-light:hover {
      background: rgba(255, 255, 255, .12);
      border-color: #fff;
    }

    .btn-sm {
      height: 42px;
      padding: 0 22px;
      font-size: 14px;
    }

    .btn-lg {
      height: 56px;
      padding: 0 36px;
      font-size: 16px;
    }

    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 60;
      padding-top: 16px;
      background: transparent;
      pointer-events: none;
    }

    .site-header .container-x {
      pointer-events: auto;
    }

    .header-card {
      display: flex;
      align-items: center;
      gap: 18px;
      padding: 10px 12px 10px 22px;
      border-radius: 20px;
      background: rgba(255, 255, 255, .92);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid rgba(255, 255, 255, .8);
      box-shadow: 0 10px 36px rgba(15, 26, 44, .09), 0 1px 0 rgba(15, 26, 44, .03);
    }

    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--ink);
      letter-spacing: -0.4px;
      margin-right: 6px;
    }

    .brand-mark {
      width: 36px;
      height: 36px;
      border-radius: 11px;
      background: linear-gradient(135deg, #0F1A2C, #12B3A8);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 800;
      box-shadow: 0 6px 14px rgba(18, 179, 168, .3);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 6px;
      margin-left: auto;
    }

    .nav-links a {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 9px 15px;
      border-radius: var(--radius-pill);
      font-size: 15px;
      font-weight: 600;
      color: #586273;
    }

    .nav-links a svg {
      flex: none;
      opacity: .68;
    }

    .nav-links a:hover {
      background: #F1F4F8;
      color: var(--ink);
    }

    .nav-links a.active {
      background: #E7FBFA;
      color: var(--teal-dark);
      font-weight: 700;
      box-shadow: inset 0 0 0 1px rgba(18, 179, 168, .22);
    }

    .nav-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: #EEF3F6;
      color: var(--ink);
      align-items: center;
      justify-content: center;
      border: 1px solid #E7EDF2;
    }

    .mobile-nav {
      position: fixed;
      top: 84px;
      left: 18px;
      right: 18px;
      z-index: 65;
      display: none;
      flex-direction: column;
      padding: 12px;
      background: #FFFFFF;
      border-radius: 18px;
      box-shadow: 0 22px 46px rgba(15, 26, 44, .16);
      border: 1px solid rgba(15, 26, 44, .05);
    }

    .mobile-nav.is-open {
      display: flex;
    }

    .mobile-nav a {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 14px 18px;
      font-weight: 600;
      font-size: 16px;
      color: var(--text);
      border-radius: 12px;
    }

    .mobile-nav a:hover {
      background: #F3F6F9;
    }

    .mobile-nav a.active {
      background: #E7FBFA;
      color: var(--teal-dark);
    }

    /* Hero */
    .guide-hero {
      position: relative;
      padding: 150px 0 148px;
      background-size: cover;
      background-position: center;
      margin-top: -92px;
    }

    .guide-hero-mask {
      position: absolute;
      inset: 0;
      background: linear-gradient(115deg, rgba(10, 20, 34, .94) 0%, rgba(15, 26, 44, .82) 48%, rgba(7, 33, 42, .76) 100%);
      z-index: 1;
    }

    .guide-hero-content {
      position: relative;
      z-index: 2;
      color: #EAF0F7;
      max-width: 846px;
      padding-top: 24px;
    }

    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 2px;
      color: #B9F0EB;
      padding: 8px 18px;
      border-radius: 46px;
      background: rgba(18, 179, 168, .14);
      border: 1px solid rgba(18, 179, 168, .42);
      margin-bottom: 24px;
    }

    .hero-kicker::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #37D7CA;
      box-shadow: 0 0 0 4px rgba(55, 215, 202, .16);
    }

    .hero-title {
      font-size: clamp(34px, 5vw, 58px);
      line-height: 1.22;
      font-weight: 800;
      letter-spacing: -1.5px;
      color: #FFFFFF;
      margin: 0;
      text-wrap: balance;
    }

    .hero-title .accent {
      color: #45E0D3;
    }

    .hero-lead {
      font-size: 18px;
      line-height: 1.9;
      color: #C9D6E4;
      max-width: 710px;
      margin: 26px 0 32px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .hero-proof {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 24px;
      margin-top: 30px;
      color: #B3C2D2;
      font-size: 14px;
    }

    .hero-proof span {
      display: inline-flex;
      align-items: center;
      gap: 7px;
    }

    .hero-proof span::before {
      content: "✓";
      color: #45E0D3;
      font-weight: 800;
    }

    .hero-scroll {
      margin-top: 58px;
      display: inline-flex;
      align-items: center;
      gap: 9px;
      font-size: 13px;
      color: #92A4B8;
      letter-spacing: 2px;
    }

    .hero-scroll svg {
      animation: heroBounce 1.8s infinite ease-in-out;
    }

    @keyframes heroBounce {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(6px); }
    }

    /* Cards */
    .guide-card {
      position: relative;
      display: flex;
      flex-direction: column;
      min-height: 280px;
      border-radius: var(--radius-card);
      padding: 36px 30px;
      transition: transform .3s ease, box-shadow .3s ease;
    }

    .guide-card:hover {
      transform: translateY(-4px);
    }

    .guide-card-stroke {
      background: transparent;
      border: 1px solid #E3E7ED;
      box-shadow: none;
    }

    .guide-card-stroke:hover {
      border-color: #B9DCD8;
      box-shadow: var(--shadow-sm);
    }

    .guide-card-tint {
      background: linear-gradient(150deg, #E9FCFA, #F5FFFF);
      border: 1px solid #B9EFEA;
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, .76);
    }

    .guide-card-tint:hover {
      box-shadow: 0 16px 38px rgba(18, 179, 168, .12);
    }

    .guide-card-dark {
      background: linear-gradient(160deg, #0F1A2C, #17263C);
      border: 1px solid rgba(255, 255, 255, .08);
      color: #C6D1E0;
      box-shadow: 0 18px 38px rgba(15, 26, 44, .22);
    }

    .guide-card-dark h3 {
      color: #FFFFFF;
    }

    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: 15px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 22px;
      background: #EEF5F7;
      color: var(--teal-dark);
    }

    .guide-card-tint .card-icon {
      background: #FFFFFF;
    }

    .guide-card-dark .card-icon {
      background: rgba(255, 255, 255, .1);
      color: #45E0D3;
    }

    .guide-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin: 0 0 12px;
      line-height: 1.45;
      color: var(--ink);
    }

    .guide-card p {
      font-size: 15px;
      line-height: 1.8;
      margin: 0;
      color: #5B6675;
    }

    .guide-card-dark p {
      color: #A8B8CB;
    }

    .guide-card .card-step-mark {
      position: absolute;
      right: 22px;
      top: 20px;
      font-family: "Inter", "SF Pro Display", -apple-system, sans-serif;
      font-size: 34px;
      font-weight: 800;
      line-height: 1;
      color: #E6EBF0;
    }

    .guide-card-dark .card-step-mark {
      color: rgba(201, 169, 106, .44);
    }

    .guide-more {
      margin-top: 24px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-weight: 700;
      font-size: 14px;
      color: var(--teal-dark);
    }

    .guide-more:hover {
      gap: 11px;
    }

    .guide-card-dark .guide-more {
      color: #77E8DE;
    }

    /* Intro / two columns */
    .split-row {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 60px;
      align-items: center;
    }

    .visual-card {
      position: relative;
      border-radius: 24px;
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      background: #E8EEF3;
      border: 1px solid rgba(255, 255, 255, .7);
    }

    .visual-card img {
      width: 100%;
      height: 450px;
      object-fit: cover;
    }

    .visual-card-figcaption {
      position: absolute;
      left: 16px;
      bottom: 16px;
      right: 16px;
      z-index: 3;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 18px;
      border-radius: 14px;
      background: rgba(15, 26, 44, .72);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      color: #fff;
      font-size: 13px;
      font-weight: 600;
    }

    .check-list {
      list-style: none;
      margin: 20px 0 0;
      padding: 0;
    }

    .check-list li {
      display: flex;
      gap: 13px;
      align-items: flex-start;
      padding: 13px 0;
      border-bottom: 1px solid #E6EBF0;
      font-size: 16px;
      color: #374151;
    }

    .check-list li:last-child {
      border-bottom: none;
    }

    .check-icon {
      flex: 0 0 30px;
      width: 30px;
      height: 30px;
      margin-top: 3px;
      border-radius: 50%;
      background: var(--teal);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
    }

    /* Steps */
    .steps-wrap {
      position: relative;
    }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .step-box {
      background: #FFFFFF;
      border-radius: 22px;
      padding: 38px 30px;
      border: 1px solid #E8ECF1;
      box-shadow: 0 8px 24px rgba(15, 26, 44, .05);
      transition: transform .25s ease, box-shadow .25s ease;
    }

    .step-box:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-5px);
    }

    .step-index {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      background: #E7FBFA;
      color: var(--teal-dark);
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 24px;
    }

    .step-box h3 {
      font-size: 20px;
      font-weight: 700;
      margin: 0 0 12px;
      color: var(--ink);
    }

    .step-box p {
      margin: 0;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.85;
    }

    /* Scenario cards */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .scenario-card {
      display: flex;
      gap: 20px;
      background: #FFFFFF;
      border-radius: 20px;
      padding: 26px;
      border: 1px solid #E7EBF0;
      box-shadow: 0 8px 24px rgba(15, 26, 44, .05);
      align-items: flex-start;
      transition: box-shadow .25s ease, border-color .25s ease;
    }

    .scenario-card:hover {
      box-shadow: var(--shadow-lg);
      border-color: #B8E5E1;
    }

    .scenario-icon {
      flex: none;
      width: 52px;
      height: 52px;
      border-radius: 17px;
      background: #EEF7F6;
      color: var(--teal-dark);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .scenario-card:nth-child(2) .scenario-icon {
      background: #F9F3EA;
      color: #B08D57;
    }

    .scenario-card:nth-child(3) .scenario-icon {
      background: #EDF0F6;
      color: var(--ink);
    }

    .scenario-card:nth-child(4) .scenario-icon {
      background: #FDEFF2;
      color: #C4576B;
    }

    .scenario-card h3 {
      margin: 0 0 10px;
      font-size: 19px;
      font-weight: 700;
      color: var(--ink);
    }

    .scenario-card p {
      margin: 0;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.8;
    }

    /* Trust strip */
    .trust-strip {
      position: relative;
      padding: 100px 0;
      background-size: cover;
      background-position: center;
      background-attachment: fixed;
    }

    .trust-mask {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(15, 26, 44, .95) 0%, rgba(10, 36, 40, .9) 100%);
      z-index: 1;
    }

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

    .trust-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .trust-item {
      text-align: center;
      padding: 12px 10px;
      border-right: 1px solid rgba(255, 255, 255, .13);
    }

    .trust-item:last-child {
      border-right: 0;
    }

    .trust-num {
      font-family: "Inter", -apple-system, "PingFang SC", sans-serif;
      font-size: 44px;
      line-height: 1.2;
      font-weight: 800;
      color: #FFFFFF;
      letter-spacing: -1px;
    }

    .trust-item p {
      color: #AEC4D0;
      font-size: 15px;
      margin: 10px 0 0;
    }

    /* FAQ */
    .faq-list {
      max-width: 880px;
      margin: 0 auto;
    }

    .faq-item {
      background: #fff;
      border: 1px solid #E5E9EF;
      border-radius: 16px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: border-color .25s ease, box-shadow .25s ease;
    }

    .faq-item.open {
      border-color: #B7E5E1;
      box-shadow: 0 10px 30px rgba(15, 26, 44, .06);
    }

    .faq-q {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 22px 24px;
      background: transparent;
      font-size: 16px;
      font-weight: 700;
      color: var(--text);
      text-align: left;
      line-height: 1.5;
    }

    .faq-q:hover {
      color: var(--teal-dark);
    }

    .faq-icon {
      flex: none;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: #E7FBFA;
      color: var(--teal-dark);
      font-size: 20px;
      font-weight: 400;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: transform .25s ease, background .25s ease;
    }

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      background: var(--teal);
      color: #fff;
    }

    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height .3s ease;
    }

    .faq-a p {
      margin: 0;
      padding: 0 26px 26px;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.85;
    }

    .faq-help {
      margin: 34px 0 0;
      text-align: center;
      font-size: 15px;
      color: var(--muted);
    }

    .faq-help a {
      font-weight: 700;
      color: var(--teal-dark);
    }

    .faq-help a:hover {
      text-decoration: underline;
    }

    /* CTA */
    .cta-panel {
      position: relative;
      border-radius: 32px;
      overflow: hidden;
      background-size: cover;
      background-position: center;
    }

    .cta-panel-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(15, 26, 44, .96), rgba(12, 45, 49, .88));
      z-index: 1;
    }

    .cta-content {
      position: relative;
      z-index: 2;
      padding: 74px 64px;
      color: #fff;
      display: grid;
      grid-template-columns: 1.5fr auto;
      gap: 40px;
      align-items: center;
    }

    .cta-content h2 {
      font-size: 32px;
      line-height: 1.3;
      letter-spacing: -.5px;
      margin: 0 0 16px;
      color: #fff;
    }

    .cta-content p {
      margin: 0;
      font-size: 16px;
      color: #BFCFDC;
      max-width: 640px;
    }

    .cta-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }

    /* Footer shared */
    .footer {
      background: var(--ink);
      padding: 78px 0 0 0;
      color: #A6B6C8;
      margin-top: 60px;
    }

    .footer .brand-logo {
      color: #fff;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 48px;
      border-bottom: 1px solid rgba(255, 255, 255, .08);
    }

    .footer-grid p {
      color: #7E93A8;
      max-width: 320px;
    }

    .footer-grid a {
      display: block;
      font-size: 14px;
      padding: 6px 0;
      color: #A6B6C8;
    }

    .footer-grid a:hover {
      color: #FFFFFF;
    }

    .foot-title {
      color: #fff;
      font-weight: 700;
      font-size: 15px;
      margin: 0 0 14px;
    }

    .footer-copy {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 15px;
      padding: 22px 0;
      font-size: 13px;
      color: #6C8093;
    }

    /* Responsive */
    @media (max-width: 1100px) {
      .trust-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .trust-item {
        border-bottom: 1px solid rgba(255, 255, 255, .1);
        padding: 28px 10px;
      }

      .trust-item:nth-child(2) {
        border-right: 0;
      }

      .split-row {
        grid-template-columns: 1fr;
        gap: 48px;
      }
    }

    @media (max-width: 920px) {
      .nav-links,
      .nav-cta {
        display: none;
      }

      .nav-toggle {
        display: inline-flex;
      }

      .guide-hero {
        margin-top: 0;
        padding-top: 105px;
      }

      .content-section {
        padding: 86px 0;
      }

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

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

      .cta-content {
        grid-template-columns: 1fr;
        padding: 50px 32px;
      }
    }

    @media (max-width: 640px) {
      .container-x {
        padding-left: 16px;
        padding-right: 16px;
      }

      .content-section {
        padding: 68px 0;
      }

      .header-card {
        padding: 8px 8px 8px 14px;
      }

      .brand-logo {
        font-size: 17px;
      }

      .brand-mark {
        width: 32px;
        height: 32px;
        font-size: 13px;
      }

      .guide-hero {
        padding: 90px 0 80px;
      }

      .hero-title {
        font-size: 31px;
        line-height: 1.3;
      }

      .hero-lead {
        font-size: 16px;
      }

      .hero-actions .btn {
        width: 100%;
      }

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

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

      .trust-item {
        border-right: 0;
        border-bottom: 1px solid rgba(255, 255, 255, .1);
      }

      .cta-actions .btn {
        width: 100%;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }

      .footer-copy {
        flex-direction: column;
      }

      .visual-card img {
        height: 280px;
      }
    }