/* roulang page: index */
:root {
      --color-bg: #f7f4ee;
      --color-surface: #fffdf8;
      --color-surface-2: #fff7e6;
      --color-ink: #231b16;
      --color-muted: #76695e;
      --color-soft: #9a8e82;
      --color-primary: #e6512f;
      --color-primary-dark: #b73922;
      --color-accent: #1f8f7a;
      --color-accent-2: #6b4eff;
      --color-warning: #f5a623;
      --color-border: rgba(35, 27, 22, .12);
      --color-border-strong: rgba(35, 27, 22, .2);
      --shadow-sm: 0 8px 24px rgba(57, 40, 25, .08);
      --shadow-md: 0 18px 50px rgba(57, 40, 25, .12);
      --shadow-lg: 0 26px 80px rgba(57, 40, 25, .18);
      --radius-sm: 12px;
      --radius-md: 18px;
      --radius-lg: 28px;
      --radius-xl: 38px;
      --container: 1180px;
      --nav-height: 72px;
      --ease: cubic-bezier(.2, .8, .2, 1);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
    }

    body {
      margin: 0;
      min-width: 320px;
      background:
        radial-gradient(circle at 8% 6%, rgba(230, 81, 47, .14), transparent 32%),
        radial-gradient(circle at 92% 12%, rgba(31, 143, 122, .14), transparent 30%),
        linear-gradient(180deg, #fffaf1 0%, var(--color-bg) 42%, #f5efe4 100%);
      color: var(--color-ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      font-size: 16px;
      line-height: 1.75;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color .22s var(--ease), background .22s var(--ease), border-color .22s var(--ease), transform .22s var(--ease), box-shadow .22s var(--ease);
    }

    a:hover,
    a:focus {
      color: var(--color-primary);
      outline: none;
    }

    button,
    input {
      font: inherit;
    }

    button {
      cursor: pointer;
    }

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

    ::selection {
      background: rgba(230, 81, 47, .22);
    }

    .site-shell {
      position: relative;
      overflow: hidden;
    }

    .container {
      width: min(var(--container), calc(100% - 40px));
      margin: 0 auto;
    }

    .skip-link {
      position: absolute;
      top: -120px;
      left: 20px;
      z-index: 1000;
      padding: 10px 14px;
      border-radius: 999px;
      background: var(--color-ink);
      color: #fff;
    }

    .skip-link:focus {
      top: 14px;
      color: #fff;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 900;
      background: rgba(255, 253, 248, .88);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--color-border);
      box-shadow: 0 8px 28px rgba(35, 27, 22, .05);
    }

    .header-top {
      min-height: var(--nav-height);
      display: flex;
      align-items: center;
      gap: 20px;
      padding: 14px 0 12px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      flex: 0 0 auto;
      min-width: max-content;
      color: var(--color-ink);
      font-weight: 900;
      letter-spacing: -.03em;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      border-radius: 15px;
      color: #fff;
      background:
        linear-gradient(135deg, var(--color-primary), #ff8a4c 52%, var(--color-accent));
      box-shadow: 0 12px 28px rgba(230, 81, 47, .24);
      font-size: 18px;
      font-weight: 900;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      line-height: 1.12;
    }

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

    .brand-sub {
      margin-top: 3px;
      color: var(--color-muted);
      font-size: 12px;
      font-weight: 700;
      letter-spacing: .04em;
    }

    .header-search {
      position: relative;
      flex: 1 1 auto;
      max-width: 520px;
      margin-left: auto;
    }

    .header-search input {
      width: 100%;
      height: 46px;
      padding: 0 48px 0 18px;
      border: 1px solid var(--color-border);
      border-radius: 999px;
      background: rgba(255, 255, 255, .72);
      color: var(--color-ink);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, .7);
      transition: border-color .22s var(--ease), box-shadow .22s var(--ease), background .22s var(--ease);
    }

    .header-search input::placeholder {
      color: #9a8d81;
    }

    .header-search input:focus {
      outline: none;
      border-color: rgba(230, 81, 47, .55);
      background: #fff;
      box-shadow: 0 0 0 4px rgba(230, 81, 47, .13);
    }

    .search-submit {
      position: absolute;
      right: 6px;
      top: 50%;
      width: 36px;
      height: 36px;
      transform: translateY(-50%);
      border: 0;
      border-radius: 50%;
      background: var(--color-ink);
      color: #fff;
      display: grid;
      place-items: center;
      transition: background .22s var(--ease), transform .22s var(--ease);
    }

    .search-submit:hover {
      background: var(--color-primary);
      transform: translateY(-50%) scale(1.04);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex: 0 0 auto;
    }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 44px;
      padding: 0 18px;
      border-radius: 999px;
      color: #fff;
      background: var(--color-primary);
      font-weight: 800;
      box-shadow: 0 12px 24px rgba(230, 81, 47, .22);
    }

    .nav-cta:hover,
    .nav-cta:focus {
      color: #fff;
      background: var(--color-primary-dark);
      transform: translateY(-1px);
    }

    .tabs-row {
      border-top: 1px solid rgba(35, 27, 22, .08);
      padding: 9px 0 10px;
      overflow-x: auto;
      scrollbar-width: none;
    }

    .tabs-row::-webkit-scrollbar {
      display: none;
    }

    .channel-tabs {
      display: flex;
      align-items: center;
      gap: 10px;
      min-width: max-content;
      margin: 0;
      list-style: none;
    }

    .channel-tabs a {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 9px 16px;
      border: 1px solid transparent;
      border-radius: 999px;
      color: var(--color-muted);
      font-size: 14px;
      font-weight: 800;
      background: rgba(255, 255, 255, .42);
    }

    .channel-tabs a:hover {
      border-color: rgba(230, 81, 47, .22);
      color: var(--color-primary);
      background: rgba(230, 81, 47, .08);
    }

    .channel-tabs a.active {
      color: #fff;
      border-color: transparent;
      background: var(--color-ink);
      box-shadow: 0 8px 22px rgba(35, 27, 22, .18);
    }

    .section {
      padding: 84px 0;
      position: relative;
    }

    .section.compact {
      padding: 58px 0;
    }

    .section-heading {
      max-width: 720px;
      margin-bottom: 32px;
    }

    .section-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 12px;
      margin-bottom: 14px;
      border-radius: 999px;
      background: rgba(31, 143, 122, .1);
      color: #146957;
      font-size: 13px;
      font-weight: 900;
      letter-spacing: .04em;
    }

    .section-title {
      margin: 0 0 12px;
      color: var(--color-ink);
      font-size: clamp(28px, 4vw, 44px);
      line-height: 1.16;
      letter-spacing: -.04em;
      font-weight: 950;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      min-height: 48px;
      padding: 0 20px;
      border-radius: 999px;
      border: 1px solid transparent;
      font-weight: 900;
      line-height: 1;
      transition: transform .22s var(--ease), box-shadow .22s var(--ease), background .22s var(--ease), color .22s var(--ease), border-color .22s var(--ease);
      user-select: none;
    }

    .btn-primary {
      color: #fff;
      background: var(--color-primary);
      box-shadow: 0 16px 34px rgba(230, 81, 47, .28);
    }

    .btn-primary:hover,
    .btn-primary:focus {
      color: #fff;
      background: var(--color-primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 20px 42px rgba(230, 81, 47, .34);
    }

    .btn-secondary {
      color: var(--color-ink);
      background: rgba(255, 255, 255, .72);
      border-color: var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .btn-secondary:hover,
    .btn-secondary:focus {
      color: var(--color-primary);
      border-color: rgba(230, 81, 47, .32);
      transform: translateY(-2px);
      background: #fff;
    }

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

    .btn-dark:hover,
    .btn-dark:focus {
      color: #fff;
      background: #3a2e27;
      transform: translateY(-2px);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 10px;
      border-radius: 999px;
      background: rgba(255, 255, 255, .72);
      border: 1px solid var(--color-border);
      color: var(--color-muted);
      font-size: 13px;
      font-weight: 800;
    }

    .hero {
      padding: 54px 0 82px;
    }

    .invite-hero {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius-xl);
      padding: clamp(28px, 5vw, 56px);
      background:
        linear-gradient(115deg, rgba(35, 27, 22, .92), rgba(35, 27, 22, .78)),
        radial-gradient(circle at 76% 22%, rgba(230, 81, 47, .55), transparent 30%),
        radial-gradient(circle at 20% 84%, rgba(31, 143, 122, .44), transparent 28%);
      color: #fff;
      box-shadow: var(--shadow-lg);
    }

    .invite-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(90deg, rgba(0,0,0,.9), transparent 86%);
      pointer-events: none;
    }

    .invite-hero::after {
      content: "";
      position: absolute;
      right: -110px;
      top: -150px;
      width: 420px;
      height: 420px;
      border-radius: 50%;
      background: rgba(255, 255, 255, .08);
      border: 1px solid rgba(255,255,255,.14);
      pointer-events: none;
    }

    .hero-grid {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 380px;
      gap: 34px;
      align-items: center;
    }

    .hero-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 18px;
    }

    .hero .badge {
      color: rgba(255, 255, 255, .86);
      background: rgba(255, 255, 255, .11);
      border-color: rgba(255, 255, 255, .16);
      backdrop-filter: blur(12px);
    }

    .hero h1 {
      margin: 0 0 18px;
      max-width: 820px;
      font-size: clamp(34px, 6vw, 68px);
      line-height: 1.04;
      letter-spacing: -.06em;
      color: #fff;
      font-weight: 950;
    }

    .hero-intro {
      max-width: 760px;
      margin: 0;
      color: rgba(255, 255, 255, .82);
      font-size: clamp(16px, 2vw, 19px);
      line-height: 1.9;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 28px;
    }

    .hero-actions .btn-secondary {
      background: rgba(255, 255, 255, .12);
      border-color: rgba(255, 255, 255, .2);
      color: #fff;
      box-shadow: none;
    }

    .hero-actions .btn-secondary:hover {
      color: #fff;
      background: rgba(255,255,255,.18);
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
      margin-top: 30px;
      max-width: 760px;
    }

    .metric {
      padding: 16px;
      border: 1px solid rgba(255,255,255,.14);
      border-radius: 18px;
      background: rgba(255,255,255,.09);
      backdrop-filter: blur(12px);
    }

    .metric strong {
      display: block;
      font-size: 24px;
      line-height: 1;
      letter-spacing: -.03em;
      color: #fff;
    }

    .metric span {
      display: block;
      margin-top: 8px;
      color: rgba(255,255,255,.72);
      font-size: 13px;
      line-height: 1.45;
    }

    .reward-panel {
      border-radius: 28px;
      padding: 22px;
      background: rgba(255, 253, 248, .92);
      color: var(--color-ink);
      box-shadow: 0 22px 70px rgba(0,0,0,.24);
      border: 1px solid rgba(255,255,255,.5);
    }

    .reward-top {
      display: flex;
      justify-content: space-between;
      gap: 14px;
      align-items: flex-start;
      margin-bottom: 18px;
    }

    .reward-label {
      color: var(--color-muted);
      font-size: 13px;
      font-weight: 900;
    }

    .reward-title {
      margin: 4px 0 0;
      font-size: 22px;
      font-weight: 950;
      letter-spacing: -.04em;
      line-height: 1.2;
    }

    .reward-chip {
      flex: 0 0 auto;
      padding: 7px 11px;
      border-radius: 999px;
      color: #fff;
      background: var(--color-accent);
      font-size: 12px;
      font-weight: 900;
    }

    .progress-wrap {
      padding: 16px;
      border-radius: 20px;
      background: #f8f0e4;
      border: 1px solid rgba(35,27,22,.08);
    }

    .progress-info {
      display: flex;
      justify-content: space-between;
      color: var(--color-muted);
      font-size: 13px;
      font-weight: 800;
      margin-bottom: 10px;
    }

    .progress-bar {
      height: 12px;
      border-radius: 999px;
      background: rgba(35,27,22,.1);
      overflow: hidden;
    }

    .progress-fill {
      height: 100%;
      width: 68%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--color-primary), #ffb15d);
      box-shadow: 0 6px 18px rgba(230,81,47,.35);
    }

    .reward-list {
      margin: 18px 0 0;
      padding: 0;
      list-style: none;
      display: grid;
      gap: 10px;
    }

    .reward-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.6;
    }

    .reward-list li::before {
      content: "✓";
      flex: 0 0 auto;
      width: 22px;
      height: 22px;
      display: grid;
      place-items: center;
      margin-top: 1px;
      border-radius: 50%;
      color: #fff;
      background: var(--color-accent);
      font-size: 12px;
      font-weight: 900;
    }

    .entry-section {
      padding-top: 22px;
    }

    .entry-layout {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 24px;
      align-items: stretch;
    }

    .entry-main-card {
      min-height: 100%;
      padding: 30px;
      border-radius: var(--radius-lg);
      background:
        linear-gradient(135deg, rgba(255,255,255,.92), rgba(255,247,230,.88));
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-md);
    }

    .entry-main-card h3 {
      margin: 0 0 14px;
      font-size: 28px;
      line-height: 1.2;
      letter-spacing: -.04em;
      font-weight: 950;
    }

    .entry-main-card p {
      margin: 0 0 24px;
      color: var(--color-muted);
      line-height: 1.85;
    }

    .entry-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .entry-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 14px;
      border-radius: 999px;
      background: #fff;
      border: 1px solid var(--color-border);
      color: var(--color-muted);
      font-weight: 800;
      font-size: 14px;
    }

    .entry-pill:hover {
      border-color: rgba(230,81,47,.32);
      color: var(--color-primary);
      transform: translateY(-1px);
      box-shadow: var(--shadow-sm);
    }

    .entry-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
    }

    .entry-card {
      padding: 20px;
      border-radius: 22px;
      background: rgba(255,255,255,.82);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease);
    }

    .entry-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(230,81,47,.28);
    }

    .entry-icon {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      margin-bottom: 14px;
      color: #fff;
      background: var(--color-primary);
      font-size: 20px;
      font-weight: 900;
    }

    .entry-card:nth-child(2) .entry-icon { background: var(--color-accent); }
    .entry-card:nth-child(3) .entry-icon { background: var(--color-accent-2); }
    .entry-card:nth-child(4) .entry-icon { background: var(--color-warning); }

    .entry-card h3 {
      margin: 0 0 8px;
      font-size: 18px;
      letter-spacing: -.02em;
      font-weight: 950;
    }

    .entry-card p {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .milestone-wrap {
      display: grid;
      grid-template-columns: 360px minmax(0, 1fr);
      gap: 28px;
      align-items: start;
    }

    .milestone-aside {
      position: sticky;
      top: 142px;
      padding: 26px;
      border-radius: var(--radius-lg);
      background: var(--color-ink);
      color: #fff;
      box-shadow: var(--shadow-md);
    }

    .milestone-aside h2 {
      margin: 0 0 12px;
      font-size: 30px;
      line-height: 1.18;
      letter-spacing: -.04em;
      font-weight: 950;
      color: #fff;
    }

    .milestone-aside p {
      margin: 0;
      color: rgba(255,255,255,.72);
      line-height: 1.8;
    }

    .timeline {
      display: grid;
      gap: 14px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .timeline-item {
      position: relative;
      display: grid;
      grid-template-columns: 110px minmax(0, 1fr);
      gap: 18px;
      padding: 22px;
      border-radius: 24px;
      background: rgba(255,255,255,.82);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .timeline-time {
      color: var(--color-primary);
      font-weight: 950;
      font-size: 15px;
      line-height: 1.3;
    }

    .timeline-content h3 {
      margin: 0 0 7px;
      font-size: 20px;
      letter-spacing: -.03em;
      font-weight: 950;
    }

    .timeline-content p {
      margin: 0;
      color: var(--color-muted);
      font-size: 15px;
      line-height: 1.75;
    }

    .news-section {
      background: rgba(255,253,248,.54);
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
    }

    .news-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 340px;
      gap: 24px;
      align-items: start;
    }

    .news-list {
      padding: 8px;
      border-radius: var(--radius-lg);
      background: rgba(255,255,255,.72);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-md);
    }

    .news-link {
      display: grid;
      grid-template-columns: 92px minmax(0, 1fr) auto;
      gap: 16px;
      align-items: center;
      padding: 18px;
      border-radius: 20px;
      color: var(--color-ink);
    }

    .news-link + .news-link {
      border-top: 1px solid rgba(35,27,22,.08);
    }

    .news-link:hover {
      background: #fff7ed;
      color: var(--color-primary);
      transform: translateX(2px);
    }

    .news-date {
      color: var(--color-soft);
      font-size: 13px;
      font-weight: 900;
    }

    .news-title {
      margin: 0 0 4px;
      font-size: 17px;
      font-weight: 950;
      line-height: 1.35;
    }

    .news-summary {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.55;
    }

    .news-arrow {
      color: var(--color-soft);
      font-weight: 950;
    }

    .recommend-panel {
      padding: 24px;
      border-radius: var(--radius-lg);
      background:
        linear-gradient(160deg, #fff, #fff2df);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .recommend-panel h3 {
      margin: 0 0 14px;
      font-size: 22px;
      letter-spacing: -.03em;
      font-weight: 950;
    }

    .check-list {
      display: grid;
      gap: 12px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .check-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: var(--color-muted);
      font-size: 15px;
      line-height: 1.7;
    }

    .check-list li::before {
      content: "";
      flex: 0 0 auto;
      width: 9px;
      height: 9px;
      margin-top: 10px;
      border-radius: 50%;
      background: var(--color-primary);
      box-shadow: 0 0 0 5px rgba(230,81,47,.12);
    }

    .guarantee-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 16px;
    }

    .guarantee-card {
      padding: 24px;
      border-radius: var(--radius-lg);
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: transform .22s var(--ease), box-shadow .22s var(--ease);
    }

    .guarantee-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .guarantee-number {
      width: 48px;
      height: 48px;
      display: grid;
      place-items: center;
      margin-bottom: 18px;
      border-radius: 18px;
      background: rgba(31,143,122,.12);
      color: var(--color-accent);
      font-size: 18px;
      font-weight: 950;
    }

    .guarantee-card h3 {
      margin: 0 0 10px;
      font-size: 21px;
      letter-spacing: -.03em;
      font-weight: 950;
    }

    .guarantee-card p {
      margin: 0;
      color: var(--color-muted);
      line-height: 1.75;
    }

    .campaign {
      padding: 0;
    }

    .campaign-band {
      display: grid;
      grid-template-columns: .95fr 1.05fr;
      gap: 26px;
      align-items: center;
      padding: clamp(26px, 5vw, 46px);
      border-radius: var(--radius-xl);
      background:
        radial-gradient(circle at 16% 20%, rgba(255,255,255,.22), transparent 30%),
        linear-gradient(135deg, #e6512f, #f39a3d 54%, #1f8f7a);
      color: #fff;
      box-shadow: var(--shadow-lg);
    }

    .campaign h2 {
      margin: 0 0 12px;
      font-size: clamp(28px, 4vw, 46px);
      line-height: 1.12;
      letter-spacing: -.05em;
      font-weight: 950;
      color: #fff;
    }

    .campaign p {
      margin: 0;
      color: rgba(255,255,255,.84);
      line-height: 1.85;
    }

    .gift-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
    }

    .gift-card {
      padding: 18px;
      border-radius: 22px;
      background: rgba(255,255,255,.16);
      border: 1px solid rgba(255,255,255,.24);
      backdrop-filter: blur(12px);
    }

    .gift-card strong {
      display: block;
      margin-bottom: 8px;
      color: #fff;
      font-size: 18px;
      font-weight: 950;
    }

    .gift-card span {
      display: block;
      color: rgba(255,255,255,.78);
      font-size: 14px;
      line-height: 1.6;
    }

    .app-stage {
      display: grid;
      grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
      gap: 28px;
      align-items: center;
    }

    .app-card {
      position: relative;
      overflow: hidden;
      min-height: 430px;
      border-radius: var(--radius-xl);
      padding: 28px;
      background:
        linear-gradient(180deg, #292019, #18120f);
      color: #fff;
      box-shadow: var(--shadow-lg);
    }

    .app-card::before {
      content: "";
      position: absolute;
      inset: auto -60px -100px auto;
      width: 280px;
      height: 280px;
      border-radius: 50%;
      background: rgba(230,81,47,.48);
      filter: blur(4px);
    }

    .app-toolbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      position: relative;
      z-index: 1;
    }

    .app-dot-group {
      display: flex;
      gap: 7px;
    }

    .app-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: rgba(255,255,255,.28);
    }

    .app-dot:nth-child(1) { background: #ff6b50; }
    .app-dot:nth-child(2) { background: #ffc15b; }
    .app-dot:nth-child(3) { background: #3ed4af; }

    .app-window {
      position: relative;
      z-index: 1;
      margin-top: 30px;
      display: grid;
      gap: 14px;
    }

    .app-row {
      display: flex;
      gap: 12px;
      align-items: center;
      padding: 14px;
      border-radius: 18px;
      background: rgba(255,255,255,.09);
      border: 1px solid rgba(255,255,255,.12);
    }

    .app-row-icon {
      width: 40px;
      height: 40px;
      border-radius: 14px;
      background: rgba(230,81,47,.9);
      display: grid;
      place-items: center;
      flex: 0 0 auto;
      font-weight: 950;
    }

    .app-row strong {
      display: block;
      color: #fff;
      line-height: 1.25;
    }

    .app-row span {
      display: block;
      color: rgba(255,255,255,.66);
      font-size: 13px;
      line-height: 1.45;
      margin-top: 3px;
    }

    .app-content {
      padding: 8px 0;
    }

    .app-feature-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
      margin: 26px 0;
    }

    .mini-feature {
      padding: 18px;
      border-radius: 22px;
      background: rgba(255,255,255,.82);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .mini-feature strong {
      display: block;
      margin-bottom: 6px;
      font-size: 17px;
      font-weight: 950;
    }

    .mini-feature span {
      display: block;
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.65;
    }

    .faq-layout {
      display: grid;
      grid-template-columns: 360px minmax(0, 1fr);
      gap: 28px;
      align-items: start;
    }

    .faq-list {
      display: grid;
      gap: 12px;
    }

    .faq-item {
      border-radius: 22px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      padding: 20px 22px;
      border: 0;
      background: transparent;
      color: var(--color-ink);
      display: flex;
      justify-content: space-between;
      gap: 20px;
      align-items: center;
      text-align: left;
      font-weight: 950;
      line-height: 1.45;
    }

    .faq-question:focus {
      outline: 3px solid rgba(230,81,47,.2);
      outline-offset: -3px;
    }

    .faq-icon {
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: rgba(230,81,47,.1);
      color: var(--color-primary);
      flex: 0 0 auto;
      transition: transform .22s var(--ease);
    }

    .faq-answer {
      padding: 0 22px 20px;
      color: var(--color-muted);
      line-height: 1.85;
    }

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

    details > summary {
      list-style: none;
    }

    details > summary::-webkit-details-marker {
      display: none;
    }

    .site-footer {
      padding: 58px 0 34px;
      background: #211914;
      color: rgba(255,255,255,.78);
    }

    .footer-main {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 360px;
      gap: 32px;
      align-items: start;
      padding-bottom: 34px;
      border-bottom: 1px solid rgba(255,255,255,.12);
    }

    .footer-brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
      color: #fff;
      font-weight: 950;
      font-size: 20px;
      letter-spacing: -.03em;
    }

    .footer-brand .brand-mark {
      width: 40px;
      height: 40px;
      box-shadow: none;
    }

    .footer-copy {
      max-width: 680px;
      margin: 0;
      color: rgba(255,255,255,.68);
      line-height: 1.85;
    }

    .footer-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: flex-end;
    }

    .footer-links a {
      display: inline-flex;
      padding: 9px 13px;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,.12);
      color: rgba(255,255,255,.72);
      font-size: 14px;
      font-weight: 800;
    }

    .footer-links a:hover {
      color: #fff;
      border-color: rgba(255,255,255,.28);
      background: rgba(255,255,255,.08);
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      align-items: center;
      padding-top: 24px;
      color: rgba(255,255,255,.52);
      font-size: 13px;
    }

    .floating-cta {
      position: fixed;
      right: 18px;
      bottom: 18px;
      z-index: 850;
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 10px 14px 10px 10px;
      border-radius: 999px;
      background: rgba(35,27,22,.9);
      color: #fff;
      box-shadow: 0 18px 50px rgba(35,27,22,.24);
      backdrop-filter: blur(12px);
    }

    .floating-cta:hover {
      color: #fff;
      transform: translateY(-2px);
      background: rgba(230,81,47,.94);
    }

    .floating-cta span:first-child {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: rgba(255,255,255,.14);
      font-weight: 950;
    }

    .floating-cta span:last-child {
      font-size: 14px;
      font-weight: 900;
    }

    @media (max-width: 1024px) {
      :root {
        --container: 920px;
      }

      .header-top {
        flex-wrap: wrap;
      }

      .header-search {
        order: 3;
        flex-basis: 100%;
        max-width: none;
        margin-left: 0;
      }

      .hero-grid,
      .entry-layout,
      .milestone-wrap,
      .news-layout,
      .campaign-band,
      .app-stage,
      .faq-layout,
      .footer-main {
        grid-template-columns: 1fr;
      }

      .milestone-aside {
        position: relative;
        top: auto;
      }

      .guarantee-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .footer-links {
        justify-content: flex-start;
      }
    }

    @media (max-width: 768px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .section {
        padding: 64px 0;
      }

      .hero {
        padding: 30px 0 58px;
      }

      .invite-hero {
        border-radius: 28px;
      }

      .hero-metrics,
      .entry-grid,
      .gift-grid,
      .app-feature-grid,
      .guarantee-grid {
        grid-template-columns: 1fr;
      }

      .timeline-item {
        grid-template-columns: 1fr;
        gap: 8px;
      }

      .news-link {
        grid-template-columns: 1fr auto;
        gap: 8px 14px;
      }

      .news-date {
        grid-column: 1 / -1;
      }

      .header-actions {
        margin-left: auto;
      }

      .nav-cta {
        padding: 0 14px;
      }

      .brand-name {
        font-size: 16px;
      }

      .brand-sub {
        display: none;
      }

      .floating-cta {
        left: 14px;
        right: 14px;
        justify-content: center;
      }
    }

    @media (max-width: 520px) {
      body {
        font-size: 15px;
      }

      .header-top {
        gap: 12px;
      }

      .brand-mark {
        width: 38px;
        height: 38px;
        border-radius: 13px;
      }

      .header-actions {
        width: 100%;
      }

      .nav-cta {
        width: 100%;
      }

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

      .reward-panel,
      .entry-main-card,
      .recommend-panel,
      .milestone-aside,
      .app-card {
        padding: 20px;
        border-radius: 24px;
      }

      .section-title {
        font-size: 29px;
      }

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }