/* roulang page: index */
:root {
      --c-primary: #2E6BA6;
      --c-primary-dark: #275c90;
      --c-primary-deep: #1f4d78;
      --c-secondary: #3C8A8A;
      --c-accent: #D9892B;
      --c-accent-dark: #c07824;
      --c-bg: #F4F7FA;
      --c-bg-alt: #FFFFFF;
      --c-card: #FFFFFF;
      --c-dark: #243140;
      --c-text: #2C3A47;
      --c-muted: #5D6B78;
      --c-border: #E3EAF1;
      --c-line: #d5dee8;
      --c-tint: #e8f1f8;
      --radius-card: 14px;
      --radius-btn: 8px;
      --radius-img: 12px;
      --radius-badge: 6px;
      --shadow: 0 10px 28px rgba(36, 74, 112, .08);
      --shadow-hover: 0 14px 36px rgba(36, 74, 112, .12);
      --container: 1200px;
      --space-section: 96px;
      --space-title: 28px;
      --nav-h: 72px;
      --fs-h1: 44px;
      --fs-h2: 30px;
      --fs-h3: 20px;
      --fs-body: 16px;
      --ease: .22s ease;
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      font-size: var(--fs-body);
      line-height: 1.85;
      color: var(--c-text);
      background: var(--c-bg);
      font-weight: 400;
      overflow-x: hidden;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--c-primary); text-decoration: none; transition: color var(--ease), opacity var(--ease); }
    a:hover { color: var(--c-primary-dark); }
    button, input, select, textarea { font-family: inherit; font-size: inherit; }
    button { cursor: pointer; }
    h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.28; color: var(--c-text); }
    p { margin: 0 0 1em; }
    p:last-child { margin-bottom: 0; }
    ul, ol { margin: 0; padding: 0; }
    :focus-visible {
      outline: 2px solid var(--c-primary);
      outline-offset: 2px;
    }
    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }
    .skip {
      position: absolute; left: -999px; top: 8px;
    }
    .skip:focus { left: 8px; background: #fff; padding: 8px 12px; z-index: 100; border-radius: 8px; }

    .site-topbar {
      background: #eef3f8;
      border-bottom: 1px solid var(--c-border);
      font-size: 13px;
      color: var(--c-muted);
      height: 38px;
    }
    .site-topbar .container {
      height: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      white-space: nowrap;
    }
    .topbar-left, .topbar-right { display: flex; align-items: center; gap: 18px; }
    .topbar-left a { color: var(--c-text); font-weight: 500; }
    .topbar-left a:hover { color: var(--c-primary); }
    .topbar-right a { color: var(--c-primary); font-weight: 500; }
    .dot-sep { width: 1px; height: 12px; background: var(--c-line); display: inline-block; }

    .nav-main {
      background: #fff;
      border-bottom: 1px solid var(--c-border);
      position: sticky;
      top: 0;
      z-index: 80;
      transition: box-shadow var(--ease), height var(--ease);
    }
    .nav-main.is-stuck {
      box-shadow: 0 8px 20px rgba(36, 74, 112, .08);
    }
    .nav-main .container {
      min-height: var(--nav-h);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .nav-main.is-stuck .container { min-height: 62px; }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--c-text);
      flex-shrink: 0;
    }
    .brand:hover { color: var(--c-primary); }
    .brand-mark {
      width: 36px; height: 36px;
      border-radius: 8px;
      background: var(--c-primary);
      color: #fff;
      display: grid;
      place-items: center;
      font-weight: 700;
      font-size: 13px;
      letter-spacing: .5px;
    }
    .brand-name { font-size: 18px; font-weight: 700; line-height: 1.2; }
    .brand-sub { font-size: 12px; color: var(--c-muted); font-weight: 400; }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-links a {
      color: var(--c-text);
      font-size: 15px;
      font-weight: 500;
      padding: 10px 12px;
      position: relative;
      display: inline-flex;
      min-height: 44px;
      align-items: center;
    }
    .nav-links a:hover { color: var(--c-primary); }
    .nav-links a.active { color: var(--c-primary); }
    .nav-links a.active::after {
      content: "";
      position: absolute;
      left: 12px; right: 12px; bottom: 6px;
      height: 2px;
      background: var(--c-primary);
      border-radius: 2px;
    }
    .nav-cta { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
    .menu-toggle {
      display: none;
      width: 44px; height: 44px;
      border: 1px solid var(--c-border);
      background: #fff;
      border-radius: 8px;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
    }
    .menu-toggle span {
      display: block; width: 18px; height: 2px;
      background: var(--c-text); border-radius: 2px;
      transition: var(--ease);
    }
    .menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
    .menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    .drawer-overlay {
      position: fixed; inset: 0;
      background: rgba(36, 49, 64, .42);
      opacity: 0; visibility: hidden;
      transition: var(--ease);
      z-index: 90;
    }
    .drawer-overlay.show { opacity: 1; visibility: visible; }
    .nav-drawer {
      position: fixed; top: 0; right: 0; bottom: 0;
      width: min(86vw, 360px);
      background: #fff;
      z-index: 100;
      transform: translateX(100%);
      transition: transform .28s ease;
      box-shadow: -12px 0 32px rgba(36, 74, 112, .12);
      padding: 24px 20px 32px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .nav-drawer.open { transform: translateX(0); }
    .nav-drawer a {
      min-height: 48px;
      display: flex;
      align-items: center;
      padding: 0 12px;
      color: var(--c-text);
      font-weight: 500;
      border-radius: 8px;
    }
    .nav-drawer a:hover, .nav-drawer a.active { background: var(--c-tint); color: var(--c-primary); }
    .drawer-head {
      display: flex; justify-content: space-between; align-items: center;
      margin-bottom: 12px;
    }
    .drawer-close {
      width: 44px; height: 44px; border: 1px solid var(--c-border);
      background: #fff; border-radius: 8px; font-size: 22px; color: var(--c-text);
    }

    .btn {
      display: inline-flex; align-items: center; justify-content: center;
      min-height: 44px; padding: 0 18px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      border: 1px solid transparent;
      transition: background var(--ease), transform var(--ease), box-shadow var(--ease), border-color var(--ease), color var(--ease);
      letter-spacing: .02em;
      text-align: center;
    }
    .btn:hover { transform: translateY(-2px); }
    .btn:active { transform: translateY(0); }
    .btn-primary {
      background: var(--c-primary); color: #fff;
      box-shadow: 0 6px 16px rgba(46, 107, 166, .22);
    }
    .btn-primary:hover { background: var(--c-primary-dark); color: #fff; }
    .btn-accent {
      background: var(--c-accent); color: #fff;
      box-shadow: 0 6px 16px rgba(217, 137, 43, .25);
    }
    .btn-accent:hover { background: var(--c-accent-dark); color: #fff; }
    .btn-ghost {
      background: #fff; color: var(--c-primary);
      border-color: var(--c-primary);
    }
    .btn-ghost:hover { background: var(--c-tint); color: var(--c-primary-dark); }
    .btn-light {
      background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.35);
    }
    .btn-light:hover { background: rgba(255,255,255,.2); color: #fff; }
    .btn-block { width: 100%; }

    .badge {
      display: inline-flex; align-items: center;
      padding: 2px 8px; border-radius: var(--radius-badge);
      font-size: 12px; font-weight: 600; line-height: 1.6;
      background: var(--c-tint); color: var(--c-primary);
    }
    .badge-teal { background: rgba(60,138,138,.12); color: var(--c-secondary); }
    .badge-amber { background: rgba(217,137,43,.14); color: var(--c-accent); }

    .section {
      padding: var(--space-section) 0;
      scroll-margin-top: 78px;
    }
    .section-white { background: var(--c-bg-alt); }
    .section-mute { background: var(--c-bg); }
    .section-head { margin-bottom: var(--space-title); max-width: 760px; }
    .section-head.center { text-align: center; margin-left: auto; margin-right: auto; }
    .kicker {
      display: inline-flex; align-items: center; gap: 8px;
      color: var(--c-secondary); font-size: 13px; font-weight: 600;
      margin-bottom: 10px;
    }
    .kicker::before {
      content: ""; width: 4px; height: 14px; background: var(--c-primary); border-radius: 2px;
    }
    .section h2 {
      font-size: var(--fs-h2);
      margin-bottom: 12px;
      position: relative;
    }
    .lead {
      color: var(--c-muted);
      font-size: 16px;
      line-height: 1.85;
    }
    .card {
      background: var(--c-card);
      border: 1px solid var(--c-border);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow);
      transition: transform var(--ease), box-shadow var(--ease);
    }
    .card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
    .cover {
      width: 100%; height: 180px; object-fit: cover; border-radius: var(--radius-img);
    }
    .card .cover { border-radius: 12px 12px 0 0; height: 190px; }

    .hero {
      padding: 0;
      background: #dce6ef;
      position: relative;
    }
    .hero-slider { position: relative; overflow: hidden; }
    .hero-slide {
      display: none;
      min-height: 640px;
      position: relative;
      background: #1c2a38 center/cover no-repeat;
    }
    .hero-slide.is-active { display: block; }
    .hero-slide::before {
      content: "";
      position: absolute; inset: 0;
      background: linear-gradient(90deg, rgba(244,247,250,.96) 0%, rgba(244,247,250,.88) 42%, rgba(36,49,64,.28) 100%);
    }
    .hero-slide .container {
      position: relative;
      z-index: 1;
      padding: 56px 0 72px;
      min-height: 640px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .hero h1 {
      font-size: var(--fs-h1);
      max-width: 640px;
      margin-bottom: 16px;
    }
    .hero .slide-title {
      font-size: 36px;
      font-weight: 700;
      max-width: 640px;
      margin-bottom: 16px;
      display: block;
    }
    .hero-lead { max-width: 640px; margin-bottom: 22px; color: var(--c-text); }
    .ba-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      max-width: 720px;
      margin-bottom: 24px;
    }
    .ba-card {
      background: #fff;
      border: 1px solid var(--c-border);
      border-radius: 12px;
      padding: 16px 18px;
      box-shadow: var(--shadow);
    }
    .ba-card .ba-label {
      font-size: 12px; font-weight: 700; letter-spacing: .08em;
      margin-bottom: 6px;
    }
    .ba-card.before .ba-label { color: var(--c-muted); }
    .ba-card.after {
      border-color: rgba(46,107,166,.35);
      box-shadow: 0 10px 24px rgba(46,107,166,.12);
    }
    .ba-card.after .ba-label { color: var(--c-primary); }
    .ba-card h3 { font-size: 18px; margin-bottom: 8px; }
    .ba-card ul { list-style: none; color: var(--c-muted); font-size: 14px; }
    .ba-card li { padding: 3px 0 3px 16px; position: relative; }
    .ba-card li::before {
      content: ""; position: absolute; left: 0; top: 12px;
      width: 7px; height: 7px; border-radius: 50%;
      background: var(--c-line);
    }
    .ba-card.after li::before { background: var(--c-secondary); }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-nav, .hero-dots { z-index: 2; }
    .hero-nav {
      position: absolute; top: 50%; transform: translateY(-50%);
      width: 44px; height: 44px; border-radius: 8px;
      border: 1px solid var(--c-border);
      background: rgba(255,255,255,.92);
      color: var(--c-text);
      display: grid; place-items: center;
      font-size: 20px;
    }
    .hero-nav.prev { left: 16px; }
    .hero-nav.next { right: 16px; }
    .hero-nav:hover { background: #fff; color: var(--c-primary); }
    .hero-dots {
      position: absolute; left: 0; right: 0; bottom: 18px;
      display: flex; justify-content: center; gap: 8px;
    }
    .hero-dots button {
      width: 10px; height: 10px; border-radius: 50%;
      border: 0; background: rgba(44,58,71,.28); padding: 0;
    }
    .hero-dots button.is-on { background: var(--c-primary); width: 22px; border-radius: 8px; }

    .intro-grid {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 36px;
      align-items: start;
    }
    .intro-photo {
      border-radius: var(--radius-img);
      overflow: hidden;
      box-shadow: var(--shadow);
      margin-bottom: 18px;
    }
    .intro-photo img { width: 100%; height: 340px; object-fit: cover; }
    .facts {
      display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
    }
    .fact {
      background: var(--c-bg);
      border: 1px solid var(--c-border);
      border-radius: 10px;
      padding: 12px 14px;
    }
    .fact b { display: block; color: var(--c-primary); font-size: 18px; font-variant-numeric: tabular-nums; }
    .fact span { color: var(--c-muted); font-size: 13px; }
    .doc-index { display: flex; flex-direction: column; gap: 12px; }
    .doc-item {
      display: grid; grid-template-columns: 52px 1fr auto;
      gap: 12px; align-items: center;
      padding: 14px 16px;
      text-align: left;
      background: #fff;
      border: 1px solid var(--c-border);
      border-radius: 12px;
      box-shadow: var(--shadow);
      color: inherit;
      width: 100%;
    }
    .doc-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); border-color: #c9d7e6; }
    .doc-no {
      width: 40px; height: 40px; border-radius: 8px;
      background: var(--c-tint); color: var(--c-primary);
      display: grid; place-items: center; font-weight: 700; font-size: 13px;
    }
    .doc-item strong { display: block; font-size: 16px; }
    .doc-item small { color: var(--c-muted); }
    .chart-wrap { margin-top: 36px; background: #fff; border: 1px solid var(--c-border); border-radius: 14px; padding: 24px 26px; box-shadow: var(--shadow); }
    .chart-wrap h3 { font-size: 18px; margin-bottom: 8px; }
    .bar-row { display: grid; grid-template-columns: 92px 1fr 48px; gap: 10px; align-items: center; margin: 10px 0; font-size: 14px; color: var(--c-muted); }
    .bar-track { height: 10px; background: #e7eef4; border-radius: 99px; overflow: hidden; }
    .bar-fill { height: 100%; border-radius: 99px; background: var(--c-primary); }
    .bar-fill.teal { background: var(--c-secondary); }
    .bar-fill.amber { background: var(--c-accent); }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
    .tag-cloud a {
      display: inline-flex; align-items: center; min-height: 36px;
      padding: 0 12px; border-radius: 6px;
      background: #fff; border: 1px solid var(--c-border); color: var(--c-text);
      font-size: 13px; font-weight: 500;
    }
    .tag-cloud a:hover { border-color: var(--c-primary); color: var(--c-primary); background: var(--c-tint); }

    .track-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .track-card { overflow: hidden; }
    .track-card .body { padding: 16px 18px 18px; }
    .track-card h3 { font-size: 18px; margin: 8px 0 6px; }
    .track-card p { color: var(--c-muted); font-size: 14px; min-height: 3.2em; }
    .track-foot {
      display: flex; justify-content: space-between; align-items: center;
      margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--c-border);
      font-size: 13px; color: var(--c-muted);
    }

    .city-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
    .city-chips button {
      min-height: 40px; padding: 0 14px; border-radius: 6px;
      border: 1px solid var(--c-border); background: #fff; color: var(--c-text); font-weight: 500;
    }
    .city-chips button.is-on { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
    .campus-line {
      background: var(--c-tint); border-radius: 10px; padding: 12px 16px;
      margin-bottom: 22px; color: var(--c-text); font-size: 14px;
    }
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .scene-card {
      padding: 22px 20px;
      display: block; color: inherit;
    }
    .scene-ico {
      width: 44px; height: 44px; border-radius: 10px;
      display: grid; place-items: center;
      background: rgba(60,138,138,.12); color: var(--c-secondary); margin-bottom: 14px;
    }
    .scene-card h3 { font-size: 18px; margin-bottom: 8px; }
    .scene-card p { color: var(--c-muted); font-size: 14px; }

    .course-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .course-card .body { padding: 18px; }
    .course-card h3 { font-size: 20px; margin: 8px 0; }
    .meta-list { list-style: none; color: var(--c-muted); font-size: 14px; margin: 8px 0 16px; }
    .meta-list li { padding: 4px 0 4px 14px; position: relative; }
    .meta-list li::before { content: ""; width: 6px; height: 6px; background: var(--c-primary); border-radius: 50%; position: absolute; left: 0; top: 12px; }

    .path-line {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
      position: relative;
    }
    .path-line::before {
      content: "";
      position: absolute; top: 28px; left: 8%; right: 8%;
      height: 2px; background: var(--c-border);
    }
    .path-step { position: relative; padding: 0 12px; }
    .path-num {
      width: 56px; height: 56px; border-radius: 12px;
      background: var(--c-secondary); color: #fff;
      display: grid; place-items: center;
      font-weight: 700; font-variant-numeric: tabular-nums;
      margin-bottom: 16px; position: relative; z-index: 1;
    }
    .path-step h3 { font-size: 18px; margin-bottom: 8px; }
    .path-step p { color: var(--c-muted); font-size: 14px; }

    .demo-stage {
      display: grid;
      grid-template-columns: 1.4fr .8fr;
      gap: 24px;
      align-items: start;
    }
    .demo-main {
      border-radius: var(--radius-img); overflow: hidden; box-shadow: var(--shadow);
      background: #fff; border: 1px solid var(--c-border);
    }
    .demo-main img { width: 100%; height: 460px; object-fit: cover; }
    .demo-cap {
      padding: 14px 18px; font-weight: 600;
      border-top: 1px solid var(--c-border);
    }
    .demo-thumbs { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .demo-thumbs button {
      padding: 0; border: 1px solid var(--c-border); border-radius: 12px;
      overflow: hidden; background: #fff; text-align: left;
    }
    .demo-thumbs button.is-on { border-color: var(--c-primary); box-shadow: var(--shadow); }
    .demo-thumbs img { width: 100%; height: 92px; object-fit: cover; }
    .demo-thumbs span { display: block; padding: 8px 10px; font-size: 13px; color: var(--c-muted); }

    .case-dark {
      background: var(--c-dark);
      color: #eef3f7;
      padding: var(--space-section) 0;
      scroll-margin-top: 78px;
    }
    .case-dark h2, .case-dark h3 { color: #fff; }
    .case-dark .lead { color: #c5d0da; }
    .case-layout {
      display: grid; grid-template-columns: .9fr 1.1fr; gap: 28px; align-items: start;
    }
    .idea-list { list-style: none; margin-top: 18px; }
    .idea-list li {
      padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.08);
      color: #d5dee6; font-size: 15px;
    }
    .case-cards { display: grid; gap: 16px; }
    .case-cards .card { padding: 20px; }
    .case-cards h3 { color: var(--c-text); font-size: 18px; margin-bottom: 8px; }
    .case-cards p { color: var(--c-muted); font-size: 14px; }

    .story-layout {
      display: grid;
      grid-template-columns: 1.2fr .8fr;
      gap: 24px;
    }
    .story-big { overflow: hidden; }
    .story-big img { width: 100%; height: 280px; object-fit: cover; }
    .story-big .body, .story-small .body { padding: 20px; }
    .story-side { display: grid; gap: 20px; }
    .story-small { display: grid; grid-template-columns: 140px 1fr; overflow: hidden; }
    .story-small img { width: 140px; height: 100%; object-fit: cover; }
    .story-layout h3 { font-size: 18px; margin-bottom: 8px; }
    .story-layout p { color: var(--c-muted); font-size: 14px; }

    .stat-bar {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 12px;
      background: #fff;
      border: 1px solid var(--c-border);
      border-radius: 14px;
      box-shadow: var(--shadow);
      padding: 28px 12px;
    }
    .stat-item { text-align: center; padding: 8px; }
    .stat-item b {
      display: block; font-size: 32px; color: var(--c-primary);
      font-variant-numeric: tabular-nums; line-height: 1.2;
    }
    .stat-item span { color: var(--c-muted); font-size: 13px; }

    .price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
      align-items: stretch;
    }
    .price-card { padding: 26px 24px; position: relative; }
    .price-card.featured {
      border: 2px solid var(--c-primary);
      transform: translateY(-8px);
    }
    .price-card.featured:hover { transform: translateY(-11px); }
    .price-card .amount {
      font-size: 36px; font-weight: 700; color: var(--c-text);
      font-variant-numeric: tabular-nums; margin: 10px 0 4px;
    }
    .price-card .amount em { font-style: normal; color: var(--c-accent); }
    .price-card ul { list-style: none; margin: 16px 0 22px; color: var(--c-muted); font-size: 14px; }
    .price-card li { padding: 6px 0 6px 18px; position: relative; }
    .price-card li::before { content: "✓"; position: absolute; left: 0; color: var(--c-secondary); font-weight: 700; }
    .ribbon {
      position: absolute; top: 16px; right: 16px;
    }

    .review-wall {
      column-count: 3; column-gap: 20px;
    }
    .review-card {
      break-inside: avoid;
      margin-bottom: 20px;
      padding: 20px;
    }
    .review-top { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
    .avatar {
      width: 42px; height: 42px; border-radius: 10px;
      background: var(--c-primary); color: #fff;
      display: grid; place-items: center; font-weight: 700;
    }
    .stars { color: var(--c-primary); letter-spacing: 2px; font-size: 13px; }
    .review-card p { color: var(--c-muted); font-size: 14px; }
    .who { font-size: 14px; font-weight: 600; }
    .who small { display: block; color: var(--c-muted); font-weight: 400; }

    .voice-layout {
      display: grid; grid-template-columns: 1fr 1fr; gap: 28px;
    }
    .quote {
      background: #fff; border-left: 4px solid var(--c-primary);
      padding: 16px 18px; border-radius: 0 12px 12px 0;
      box-shadow: var(--shadow); margin-bottom: 14px; color: var(--c-muted); font-size: 14px;
    }
    .partner-list { display: flex; flex-direction: column; gap: 10px; }
    .partner {
      background: #fff; border: 1px solid var(--c-border); border-radius: 12px;
      padding: 14px 16px; box-shadow: var(--shadow);
    }
    .partner strong { display: block; margin-bottom: 4px; }
    .partner span { color: var(--c-muted); font-size: 14px; }

    .news-layout {
      display: grid; grid-template-columns: 1.1fr .9fr; gap: 24px;
    }
    .news-feature { overflow: hidden; }
    .news-feature img { width: 100%; height: 240px; object-fit: cover; }
    .news-feature .body { padding: 18px 20px 20px; }
    .news-list { display: flex; flex-direction: column; gap: 12px; }
    .news-item {
      display: grid; grid-template-columns: 96px 1fr; gap: 14px;
      padding: 14px; background: #fff; border: 1px solid var(--c-border);
      border-radius: 12px; box-shadow: var(--shadow); color: inherit;
    }
    .news-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
    .news-item time { color: var(--c-primary); font-weight: 600; font-size: 13px; font-variant-numeric: tabular-nums; }
    .news-item h3 { font-size: 16px; margin-bottom: 4px; }
    .news-item p { font-size: 13px; color: var(--c-muted); }
    .more-row { margin-top: 18px; }

    .faq-list { display: flex; flex-direction: column; gap: 10px; max-width: 900px; }
    .faq-item { background: #fff; border: 1px solid var(--c-border); border-radius: 12px; overflow: hidden; box-shadow: var(--shadow); }
    .faq-q {
      width: 100%; text-align: left; background: #fff; border: 0;
      padding: 16px 52px 16px 18px; font-weight: 600; color: var(--c-text);
      min-height: 56px; position: relative;
    }
    .faq-q::after {
      content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%);
      color: var(--c-primary); font-size: 20px;
    }
    .faq-item.open .faq-q::after { content: "–"; }
    .faq-a {
      display: none; padding: 0 18px 16px; background: #f6f8fb; color: var(--c-muted); font-size: 15px;
    }
    .faq-item.open .faq-a { display: block; padding-top: 4px; border-top: 1px solid var(--c-border); }

    .enroll {
      background: var(--c-tint);
    }
    .enroll-box {
      display: grid; grid-template-columns: .9fr 1.1fr; gap: 32px;
      background: #fff; border: 1px solid var(--c-border);
      border-radius: 14px; box-shadow: var(--shadow);
      padding: 32px;
    }
    .need-list { list-style: none; margin-top: 16px; }
    .need-list li {
      padding: 10px 0 10px 28px; position: relative; color: var(--c-muted);
      border-bottom: 1px solid var(--c-border);
    }
    .need-list li::before {
      content: ""; width: 10px; height: 10px; border-radius: 3px;
      background: var(--c-accent); position: absolute; left: 0; top: 16px;
    }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 14px; font-weight: 600; }
    .field input, .field select, .field textarea {
      min-height: 44px; border: 1px solid var(--c-border); border-radius: 8px;
      padding: 8px 12px; background: #fff; color: var(--c-text);
    }
    .field textarea { min-height: 96px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus {
      border-color: var(--c-primary);
      box-shadow: 0 0 0 3px rgba(46,107,166,.15);
      outline: none;
    }
    .form-success {
      display: none; background: #eef8f4; border: 1px solid #b7e0cf;
      color: #215e4a; border-radius: 12px; padding: 20px;
    }
    .form-success.show { display: block; }
    .form-note { font-size: 13px; color: var(--c-muted); margin-top: 8px; }

    .site-footer {
      background: #1d2a36; color: #c5d0da; padding: 56px 0 24px;
    }
    .foot-grid {
      display: grid; grid-template-columns: 1.3fr 1fr 1.1fr .9fr; gap: 28px;
      padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,.08);
    }
    .site-footer h3 { color: #fff; font-size: 16px; margin-bottom: 12px; }
    .site-footer .brand-name { color: #fff; }
    .foot-links { list-style: none; }
    .foot-links a { color: #c5d0da; display: inline-flex; min-height: 34px; align-items: center; }
    .foot-links a:hover { color: #fff; }
    .foot-bottom {
      display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
      padding-top: 18px; font-size: 13px; color: #9aa8b5;
    }
    .foot-bottom a { color: #9aa8b5; }
    .foot-bottom a:hover { color: #fff; }

    @media (max-width: 1280px) {
      :root { --fs-h1: 40px; --space-section: 88px; }
    }
    @media (max-width: 1024px) {
      :root { --fs-h1: 36px; --fs-h2: 28px; --nav-h: 66px; }
      .nav-links { display: none; }
      .menu-toggle { display: inline-flex; }
      .intro-grid, .demo-stage, .case-layout, .story-layout, .voice-layout, .news-layout, .enroll-box {
        grid-template-columns: 1fr;
      }
      .scene-grid { grid-template-columns: 1fr 1fr; }
      .track-grid, .course-grid, .price-grid { grid-template-columns: 1fr 1fr; }
      .price-card.featured { transform: none; }
      .stat-bar { grid-template-columns: repeat(3, 1fr); }
      .review-wall { column-count: 2; }
      .foot-grid { grid-template-columns: 1fr 1fr; }
      .hero-slide, .hero-slide .container { min-height: 0; }
      .hero-slide .container { padding: 36px 0 64px; }
      .hero-slide::before {
        background: linear-gradient(180deg, rgba(244,247,250,.94) 0%, rgba(244,247,250,.9) 58%, rgba(244,247,250,.78) 100%);
      }
      .demo-main img { height: 360px; }
      .story-small { grid-template-columns: 120px 1fr; }
    }
    @media (max-width: 768px) {
      :root { --fs-h1: 32px; --fs-h2: 26px; --space-section: 72px; }
      .container { width: min(100% - 28px, var(--container)); }
      .site-topbar { height: auto; }
      .site-topbar .container {
        flex-wrap: wrap; white-space: nowrap; padding: 6px 0; gap: 6px 12px; justify-content: space-between;
      }
      .ba-grid, .facts, .form-grid, .path-line, .track-grid, .course-grid, .price-grid, .demo-thumbs {
        grid-template-columns: 1fr;
      }
      .path-line::before { display: none; }
      .path-step { padding: 0 0 18px 0; border-left: 2px solid var(--c-border); margin-left: 18px; padding-left: 18px; }
      .scene-grid { grid-template-columns: 1fr; }
      .stat-bar { grid-template-columns: 1fr 1fr; }
      .review-wall { column-count: 1; }
      .story-small { grid-template-columns: 1fr; }
      .story-small img, .story-big img { width: 100%; height: 200px; }
      .intro-photo img { height: 240px; }
      .hero h1, .hero .slide-title { font-size: 30px; }
      .hero-nav { display: none; }
      .enroll-box { padding: 20px 16px; }
      .foot-grid { grid-template-columns: 1fr; }
      .news-item { grid-template-columns: 1fr; }
    }
    @media (max-width: 520px) {
      :root { --fs-h1: 28px; --fs-h2: 24px; --fs-h3: 18px; --space-section: 64px; }
      .hero-actions .btn { width: 100%; }
      .stat-bar { grid-template-columns: 1fr 1fr; padding: 16px 8px; }
      .stat-item b { font-size: 26px; }
      .price-card .amount { font-size: 30px; }
      .nav-cta .btn { padding: 0 12px; }
    }
    @media (max-width: 375px) {
      .container { width: calc(100% - 24px); }
      .brand-sub { display: none; }
      .topbar-left span:last-child { display: none; }
    }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { transition: none !important; animation: none !important; }
      .card:hover, .btn:hover, .price-card.featured { transform: none; }
    }