/* roulang page: index */
:root {
      --color-primary: #7c3aed;
      --color-primary-dark: #5b21b6;
      --color-primary-soft: #ede9fe;
      --color-accent: #06b6d4;
      --color-accent-soft: #cffafe;
      --color-warn: #f97316;
      --color-success: #16a34a;
      --color-danger: #ef4444;
      --color-bg: #f7f7fb;
      --color-surface: #ffffff;
      --color-surface-2: #fbfbff;
      --color-deep: #101322;
      --color-deep-2: #171a2c;
      --color-text: #171827;
      --color-muted: #667085;
      --color-light: #f1f5f9;
      --color-border: rgba(17, 24, 39, 0.10);
      --shadow-sm: 0 8px 22px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 18px 45px rgba(15, 23, 42, 0.10);
      --shadow-lg: 0 30px 80px rgba(76, 29, 149, 0.20);
      --radius-sm: 12px;
      --radius-md: 18px;
      --radius-lg: 28px;
      --radius-xl: 36px;
      --container: 1180px;
      --header-height: 78px;
      --ease: 180ms ease;
    }

    * {
      box-sizing: border-box;
    }

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

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
      color: var(--color-text);
      background:
        radial-gradient(circle at top left, rgba(124, 58, 237, 0.12), transparent 32rem),
        radial-gradient(circle at 85% 18%, rgba(6, 182, 212, 0.12), transparent 28rem),
        var(--color-bg);
      line-height: 1.75;
      letter-spacing: 0.01em;
      padding-bottom: 74px;
    }

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

    a:hover,
    a:focus {
      color: var(--color-primary-dark);
    }

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

    button,
    input {
      font: inherit;
    }

    button {
      cursor: pointer;
      border: 0;
    }

    input:focus,
    button:focus,
    a:focus {
      outline: 3px solid rgba(124, 58, 237, 0.24);
      outline-offset: 3px;
    }

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      min-height: var(--header-height);
      background: rgba(255, 255, 255, 0.82);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(17, 24, 39, 0.08);
    }

    .nav-shell {
      min-height: var(--header-height);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      min-width: 0;
      font-weight: 900;
      color: var(--color-deep);
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      color: #fff;
      background:
        linear-gradient(135deg, rgba(124, 58, 237, 1), rgba(6, 182, 212, 1));
      box-shadow: 0 16px 30px rgba(124, 58, 237, 0.28);
      flex: 0 0 auto;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      line-height: 1.18;
      min-width: 0;
    }

    .brand-title {
      max-width: 270px;
      overflow: hidden;
      white-space: nowrap;
      text-overflow: ellipsis;
      font-size: 16px;
    }

    .brand-subtitle {
      color: var(--color-muted);
      font-size: 12px;
      font-weight: 700;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 6px;
      border: 1px solid rgba(17, 24, 39, 0.08);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.72);
      box-shadow: var(--shadow-sm);
    }

    .nav-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 38px;
      padding: 0 16px;
      border-radius: 999px;
      color: #475467;
      font-size: 14px;
      font-weight: 800;
    }

    .nav-link.active {
      color: #fff;
      background: var(--color-deep);
      box-shadow: 0 10px 24px rgba(16, 19, 34, 0.18);
    }

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

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .command-search {
      width: 258px;
      min-height: 42px;
      border: 1px solid rgba(17, 24, 39, 0.10);
      border-radius: 14px;
      padding: 0 12px;
      background: #fff;
      display: flex;
      align-items: center;
      gap: 9px;
      color: var(--color-muted);
      box-shadow: var(--shadow-sm);
    }

    .command-search input {
      width: 100%;
      min-width: 0;
      border: 0;
      background: transparent;
      box-shadow: none;
      margin: 0;
      padding: 0;
      height: auto;
      color: var(--color-text);
      font-size: 13px;
    }

    .kbd {
      font-size: 11px;
      color: #667085;
      background: #f2f4f7;
      border: 1px solid #e4e7ec;
      border-radius: 7px;
      padding: 2px 6px;
      white-space: nowrap;
    }

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border-radius: 14px;
      color: var(--color-deep);
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 46px;
      padding: 0 18px;
      border-radius: 999px;
      font-weight: 900;
      font-size: 14px;
      line-height: 1;
      border: 1px solid transparent;
      white-space: nowrap;
      user-select: none;
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
      box-shadow: 0 18px 36px rgba(124, 58, 237, 0.26);
    }

    .btn-primary:hover {
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 24px 44px rgba(124, 58, 237, 0.34);
    }

    .btn-dark {
      color: #fff;
      background: var(--color-deep);
      box-shadow: 0 16px 32px rgba(16, 19, 34, 0.20);
    }

    .btn-dark:hover {
      color: #fff;
      background: #000;
      transform: translateY(-2px);
    }

    .btn-light {
      color: var(--color-deep);
      background: rgba(255, 255, 255, 0.88);
      border-color: rgba(255, 255, 255, 0.52);
      box-shadow: var(--shadow-sm);
    }

    .btn-light:hover {
      color: var(--color-primary-dark);
      background: #fff;
      transform: translateY(-2px);
    }

    .btn-outline {
      color: var(--color-primary-dark);
      background: #fff;
      border-color: rgba(124, 58, 237, 0.18);
    }

    .btn-outline:hover {
      color: #fff;
      background: var(--color-primary);
      border-color: var(--color-primary);
      transform: translateY(-2px);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      width: max-content;
      max-width: 100%;
      padding: 8px 12px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 900;
      line-height: 1.2;
      color: var(--color-primary-dark);
      background: var(--color-primary-soft);
      border: 1px solid rgba(124, 58, 237, 0.16);
    }

    .badge.dark {
      color: #fff;
      background: rgba(255, 255, 255, 0.13);
      border-color: rgba(255, 255, 255, 0.22);
    }

    .section {
      padding: 76px 0;
    }

    .section.tight {
      padding: 50px 0;
    }

    .section-head {
      display: flex;
      justify-content: space-between;
      align-items: flex-end;
      gap: 24px;
      margin-bottom: 28px;
    }

    .section-kicker {
      color: var(--color-primary);
      font-size: 13px;
      font-weight: 950;
      letter-spacing: 0.08em;
      margin-bottom: 10px;
    }

    .section-title {
      margin: 0;
      color: var(--color-deep);
      font-size: clamp(26px, 3.2vw, 40px);
      line-height: 1.25;
      letter-spacing: -0.02em;
      font-weight: 950;
    }

    .section-desc {
      max-width: 680px;
      margin: 12px 0 0;
      color: var(--color-muted);
      font-size: 16px;
      line-height: 1.9;
    }

    .hero {
      min-height: calc(100vh - var(--header-height));
      display: flex;
      align-items: center;
      padding: 74px 0 58px;
      color: #fff;
      background:
        linear-gradient(135deg, rgba(16, 19, 34, 0.84), rgba(76, 29, 149, 0.66)),
        radial-gradient(circle at 20% 15%, rgba(6, 182, 212, 0.35), transparent 28rem),
        linear-gradient(135deg, #121427, #351a6b 52%, #0f172a);
      position: relative;
      overflow: hidden;
    }

    .hero:before,
    .hero:after {
      content: "";
      position: absolute;
      border-radius: 999px;
      pointer-events: none;
      filter: blur(2px);
    }

    .hero:before {
      width: 440px;
      height: 440px;
      right: -120px;
      top: -110px;
      background: rgba(6, 182, 212, 0.20);
    }

    .hero:after {
      width: 520px;
      height: 520px;
      left: -220px;
      bottom: -260px;
      background: rgba(124, 58, 237, 0.35);
    }

    .hero-inner {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 980px;
      margin: 0 auto;
    }

    .hero-brand {
      margin: 0 auto 18px;
    }

    .hero h1 {
      margin: 0;
      font-size: clamp(34px, 6vw, 70px);
      line-height: 1.12;
      font-weight: 1000;
      letter-spacing: -0.045em;
      text-wrap: balance;
    }

    .hero p {
      max-width: 820px;
      margin: 22px auto 0;
      color: rgba(255, 255, 255, 0.82);
      font-size: clamp(16px, 2.1vw, 20px);
      line-height: 1.9;
    }

    .hero-search {
      max-width: 760px;
      margin: 32px auto 0;
      padding: 9px;
      display: flex;
      align-items: center;
      gap: 10px;
      border-radius: 24px;
      background: rgba(255, 255, 255, 0.14);
      border: 1px solid rgba(255, 255, 255, 0.22);
      box-shadow: var(--shadow-lg);
      backdrop-filter: blur(18px);
    }

    .hero-search .search-icon {
      width: 46px;
      height: 46px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      color: #fff;
      background: rgba(255, 255, 255, 0.14);
      flex: 0 0 auto;
    }

    .hero-search input {
      flex: 1;
      min-width: 0;
      height: 54px;
      padding: 0 8px;
      margin: 0;
      border: 0;
      box-shadow: none;
      background: transparent;
      color: #fff;
      font-size: 16px;
    }

    .hero-search input::placeholder {
      color: rgba(255, 255, 255, 0.58);
    }

    .hero-search .btn {
      min-height: 54px;
      padding: 0 24px;
    }

    .hot-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin: 22px auto 0;
      max-width: 860px;
    }

    .hot-tags a {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 9px 13px;
      border-radius: 999px;
      color: rgba(255, 255, 255, 0.86);
      background: rgba(255, 255, 255, 0.10);
      border: 1px solid rgba(255, 255, 255, 0.18);
      font-size: 13px;
      font-weight: 800;
    }

    .hot-tags a:hover {
      color: #fff;
      background: rgba(255, 255, 255, 0.18);
      transform: translateY(-2px);
    }

    .hero-stats {
      margin: 34px auto 0;
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 14px;
      max-width: 820px;
    }

    .hero-stat {
      min-height: 94px;
      padding: 18px;
      border-radius: 22px;
      background: rgba(255, 255, 255, 0.10);
      border: 1px solid rgba(255, 255, 255, 0.16);
      text-align: left;
    }

    .hero-stat strong {
      display: block;
      font-size: 26px;
      line-height: 1;
      font-weight: 1000;
      color: #fff;
    }

    .hero-stat span {
      display: block;
      margin-top: 8px;
      color: rgba(255, 255, 255, 0.72);
      font-size: 13px;
      line-height: 1.55;
    }

    .flash-section {
      background: var(--color-surface);
      border-bottom: 1px solid var(--color-border);
    }

    .flash-track {
      display: grid;
      grid-auto-flow: column;
      grid-auto-columns: minmax(280px, 1fr);
      gap: 16px;
      overflow-x: auto;
      padding: 4px 4px 18px;
      scroll-snap-type: x mandatory;
    }

    .flash-card {
      position: relative;
      scroll-snap-align: start;
      padding: 22px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--color-border);
      background:
        linear-gradient(180deg, #fff, #fbfbff);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      min-height: 230px;
    }

    .flash-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(124, 58, 237, 0.25);
    }

    .flash-card:after {
      content: "";
      position: absolute;
      width: 150px;
      height: 150px;
      right: -58px;
      bottom: -62px;
      border-radius: 999px;
      background: rgba(124, 58, 237, 0.08);
    }

    .flash-top {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      margin-bottom: 18px;
      position: relative;
      z-index: 1;
    }

    .flash-label {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 7px 10px;
      border-radius: 999px;
      color: #9a3412;
      background: #ffedd5;
      font-size: 12px;
      font-weight: 950;
    }

    .flash-price {
      color: var(--color-danger);
      font-size: 24px;
      font-weight: 1000;
      letter-spacing: -0.03em;
    }

    .flash-card h3,
    .stock-card h3,
    .recommend-card h3,
    .step-card h3,
    .price-card h3 {
      margin: 0;
      color: var(--color-deep);
      font-size: 20px;
      line-height: 1.35;
      font-weight: 950;
      position: relative;
      z-index: 1;
    }

    .flash-card p,
    .stock-card p,
    .recommend-card p,
    .step-card p,
    .price-card p {
      margin: 10px 0 0;
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.8;
      position: relative;
      z-index: 1;
    }

    .progress {
      height: 10px;
      overflow: hidden;
      border-radius: 999px;
      background: #eef2ff;
      margin: 18px 0 16px;
      position: relative;
      z-index: 1;
    }

    .progress span {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    }

    .stock-band {
      background: linear-gradient(180deg, #f8fafc, #fff);
    }

    .stock-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 22px;
      align-items: stretch;
    }

    .stock-panel {
      padding: 30px;
      border-radius: var(--radius-xl);
      background: var(--color-deep);
      color: #fff;
      box-shadow: var(--shadow-lg);
      position: relative;
      overflow: hidden;
    }

    .stock-panel:before {
      content: "";
      position: absolute;
      inset: auto -70px -120px auto;
      width: 320px;
      height: 320px;
      border-radius: 999px;
      background: rgba(6, 182, 212, 0.22);
    }

    .stock-panel h2 {
      margin: 16px 0 0;
      font-size: clamp(26px, 3.4vw, 42px);
      line-height: 1.24;
      font-weight: 1000;
      letter-spacing: -0.025em;
      position: relative;
      z-index: 1;
    }

    .stock-panel p {
      margin: 16px 0 0;
      color: rgba(255, 255, 255, 0.76);
      max-width: 640px;
      line-height: 1.9;
      position: relative;
      z-index: 1;
    }

    .stock-status {
      margin-top: 24px;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      position: relative;
      z-index: 1;
    }

    .status-item {
      padding: 16px;
      border-radius: 18px;
      background: rgba(255, 255, 255, 0.09);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    .status-item strong {
      display: block;
      font-size: 24px;
      line-height: 1;
      font-weight: 1000;
    }

    .status-item span {
      display: block;
      margin-top: 8px;
      color: rgba(255, 255, 255, 0.66);
      font-size: 12px;
      line-height: 1.5;
    }

    .stock-cards {
      display: grid;
      gap: 14px;
    }

    .stock-card {
      padding: 22px;
      border-radius: var(--radius-lg);
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .stock-card:hover {
      transform: translateX(3px);
      border-color: rgba(6, 182, 212, 0.35);
      box-shadow: var(--shadow-md);
    }

    .stock-meta {
      display: flex;
      justify-content: space-between;
      gap: 14px;
      margin-bottom: 10px;
      color: var(--color-muted);
      font-size: 13px;
      font-weight: 800;
    }

    .trust-strip {
      padding: 28px 0;
      background: #fff;
      border-top: 1px solid var(--color-border);
      border-bottom: 1px solid var(--color-border);
    }

    .trust-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
    }

    .trust-item {
      display: flex;
      align-items: center;
      gap: 13px;
      padding: 18px;
      border-radius: var(--radius-md);
      background: #fbfbff;
      border: 1px solid var(--color-border);
    }

    .trust-icon {
      width: 44px;
      height: 44px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      color: var(--color-primary);
      background: var(--color-primary-soft);
      flex: 0 0 auto;
    }

    .trust-item strong {
      display: block;
      line-height: 1.25;
      font-weight: 950;
      color: var(--color-deep);
    }

    .trust-item span {
      display: block;
      color: var(--color-muted);
      font-size: 12px;
      line-height: 1.5;
      margin-top: 4px;
    }

    .news-layout {
      display: grid;
      grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
      gap: 22px;
      align-items: start;
    }

    .news-list,
    .side-panel,
    .faq-wrap,
    .steps-wrap,
    .recommend-wrap,
    .price-wrap {
      border-radius: var(--radius-xl);
      border: 1px solid var(--color-border);
      background: rgba(255, 255, 255, 0.88);
      box-shadow: var(--shadow-sm);
    }

    .news-list {
      overflow: hidden;
    }

    .news-row {
      display: grid;
      grid-template-columns: 110px 1fr auto;
      align-items: center;
      gap: 18px;
      padding: 22px 24px;
      border-bottom: 1px solid var(--color-border);
    }

    .news-row:last-child {
      border-bottom: 0;
    }

    .news-row:hover {
      background: #fbfbff;
    }

    .news-date {
      color: var(--color-primary);
      font-weight: 950;
      font-size: 13px;
    }

    .news-row a {
      color: var(--color-deep);
      font-weight: 950;
      line-height: 1.5;
    }

    .news-row a:hover {
      color: var(--color-primary);
    }

    .news-row p {
      margin: 6px 0 0;
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .news-arrow {
      width: 38px;
      height: 38px;
      display: grid;
      place-items: center;
      border-radius: 14px;
      color: var(--color-primary);
      background: var(--color-primary-soft);
    }

    .side-panel {
      padding: 24px;
      position: sticky;
      top: 100px;
    }

    .side-panel h3 {
      margin: 0;
      color: var(--color-deep);
      font-size: 20px;
      font-weight: 950;
    }

    .side-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 18px;
    }

    .side-tags a {
      padding: 9px 12px;
      border-radius: 999px;
      color: #475467;
      background: #f8fafc;
      border: 1px solid var(--color-border);
      font-size: 13px;
      font-weight: 800;
    }

    .side-tags a:hover {
      color: #fff;
      background: var(--color-primary);
      border-color: var(--color-primary);
    }

    .side-note {
      margin-top: 22px;
      padding: 18px;
      border-radius: var(--radius-md);
      color: #155e75;
      background: var(--color-accent-soft);
      border: 1px solid rgba(6, 182, 212, 0.22);
      font-size: 14px;
      line-height: 1.8;
    }

    .buy-section {
      color: #fff;
      background:
        radial-gradient(circle at 20% 0%, rgba(6, 182, 212, 0.18), transparent 24rem),
        linear-gradient(135deg, #111827, #22124d 58%, #111827);
    }

    .buy-section .section-title,
    .buy-section .section-kicker {
      color: #fff;
    }

    .buy-section .section-desc {
      color: rgba(255, 255, 255, 0.72);
    }

    .price-wrap {
      padding: 18px;
      background: rgba(255, 255, 255, 0.09);
      border-color: rgba(255, 255, 255, 0.14);
    }

    .price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }

    .price-card {
      padding: 24px;
      border-radius: var(--radius-lg);
      background: rgba(255, 255, 255, 0.94);
      color: var(--color-text);
      border: 1px solid rgba(255, 255, 255, 0.38);
      position: relative;
      overflow: hidden;
    }

    .price-card.featured {
      transform: translateY(-10px);
      box-shadow: 0 26px 70px rgba(6, 182, 212, 0.22);
      border-color: rgba(6, 182, 212, 0.55);
    }

    .price-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }

    .price-card.featured:hover {
      transform: translateY(-14px);
    }

    .price-num {
      margin: 18px 0 12px;
      color: var(--color-deep);
      font-size: 40px;
      line-height: 1;
      font-weight: 1000;
      letter-spacing: -0.04em;
    }

    .price-num small {
      color: var(--color-muted);
      font-size: 13px;
      font-weight: 800;
    }

    .feature-list {
      list-style: none;
      padding: 0;
      margin: 18px 0 20px;
      display: grid;
      gap: 10px;
    }

    .feature-list li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: #475467;
      font-size: 14px;
      line-height: 1.7;
    }

    .feature-list i {
      margin-top: 5px;
      color: var(--color-success);
      flex: 0 0 auto;
    }

    .steps-wrap {
      padding: 24px;
    }

    .steps-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }

    .step-card {
      padding: 24px;
      border-radius: var(--radius-lg);
      background: linear-gradient(180deg, #fff, #fbfbff);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

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

    .step-num {
      width: 46px;
      height: 46px;
      display: grid;
      place-items: center;
      margin-bottom: 18px;
      border-radius: 16px;
      color: #fff;
      background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
      font-weight: 1000;
      box-shadow: 0 14px 28px rgba(124, 58, 237, 0.22);
    }

    .recommend-wrap {
      padding: 24px;
      background: #fff;
    }

    .recommend-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .recommend-card {
      padding: 20px;
      min-height: 190px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--color-border);
      background:
        linear-gradient(180deg, rgba(124, 58, 237, 0.04), rgba(255, 255, 255, 0.95));
    }

    .recommend-card:hover {
      transform: translateY(-4px);
      border-color: rgba(124, 58, 237, 0.22);
      box-shadow: var(--shadow-md);
    }

    .recommend-icon {
      width: 48px;
      height: 48px;
      border-radius: 18px;
      display: grid;
      place-items: center;
      color: var(--color-primary);
      background: var(--color-primary-soft);
      margin-bottom: 16px;
    }

    .faq-section {
      background: linear-gradient(180deg, #fff, #f8fafc);
    }

    .faq-wrap {
      overflow: hidden;
    }

    .faq-item {
      border-bottom: 1px solid var(--color-border);
    }

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

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 22px 24px;
      color: var(--color-deep);
      background: #fff;
      font-size: 17px;
      font-weight: 950;
      text-align: left;
      transition: background var(--ease), color var(--ease);
    }

    .faq-question:hover {
      color: var(--color-primary);
      background: #fbfbff;
    }

    .faq-question i {
      color: var(--color-primary);
      transition: transform var(--ease);
    }

    .faq-item.active .faq-question i {
      transform: rotate(180deg);
    }

    .faq-answer {
      display: none;
      padding: 0 24px 24px;
      color: var(--color-muted);
      line-height: 1.9;
      background: #fff;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .fixed-cta {
      position: fixed;
      left: 50%;
      bottom: 18px;
      transform: translateX(-50%);
      z-index: 1100;
      width: min(calc(100% - 28px), 980px);
      padding: 12px 14px 12px 18px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      border-radius: 22px;
      color: #fff;
      background: rgba(16, 19, 34, 0.92);
      border: 1px solid rgba(255, 255, 255, 0.14);
      box-shadow: 0 18px 55px rgba(16, 19, 34, 0.30);
      backdrop-filter: blur(18px);
    }

    .fixed-cta strong {
      display: block;
      font-weight: 950;
      line-height: 1.3;
    }

    .fixed-cta span {
      display: block;
      margin-top: 3px;
      color: rgba(255, 255, 255, 0.66);
      font-size: 12px;
      line-height: 1.4;
    }

    .site-footer {
      padding: 56px 0 30px;
      color: rgba(255, 255, 255, 0.72);
      background: var(--color-deep);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 28px;
      align-items: start;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 14px;
      color: #fff;
      font-size: 18px;
      font-weight: 1000;
      margin-bottom: 16px;
    }

    .footer-brand .brand-mark {
      box-shadow: none;
    }

    .footer-text {
      max-width: 720px;
      margin: 0;
      line-height: 1.9;
    }

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

    .footer-links a {
      padding: 9px 12px;
      border-radius: 999px;
      color: rgba(255, 255, 255, 0.74);
      background: rgba(255, 255, 255, 0.07);
      border: 1px solid rgba(255, 255, 255, 0.10);
      font-size: 13px;
      font-weight: 800;
    }

    .footer-links a:hover {
      color: #fff;
      background: rgba(124, 58, 237, 0.45);
    }

    .footer-bottom {
      margin-top: 34px;
      padding-top: 22px;
      border-top: 1px solid rgba(255, 255, 255, 0.10);
      display: flex;
      justify-content: space-between;
      gap: 18px;
      flex-wrap: wrap;
      font-size: 13px;
    }

    @media (max-width: 1024px) {
      .nav-shell {
        gap: 14px;
      }

      .command-search {
        width: 210px;
      }

      .brand-title {
        max-width: 210px;
      }

      .stock-grid,
      .news-layout {
        grid-template-columns: 1fr;
      }

      .side-panel {
        position: static;
      }

      .trust-grid,
      .recommend-grid {
        grid-template-columns: repeat(2, 1fr);
      }

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

      .price-card.featured,
      .price-card.featured:hover {
        transform: none;
      }
    }

    @media (max-width: 768px) {
      body {
        padding-bottom: 98px;
      }

      .site-container {
        width: min(100% - 28px, var(--container));
      }

      .site-header {
        position: sticky;
      }

      .nav-shell {
        flex-wrap: wrap;
        padding: 14px 0;
      }

      .nav-menu {
        order: 3;
        width: 100%;
        display: none;
        justify-content: flex-start;
        overflow-x: auto;
        border-radius: 18px;
      }

      .nav-menu.open {
        display: flex;
      }

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

      .command-search {
        display: none;
      }

      .menu-toggle {
        display: grid;
        place-items: center;
      }

      .hero {
        min-height: auto;
        padding: 66px 0 48px;
      }

      .hero-search {
        flex-direction: column;
        padding: 12px;
        border-radius: 22px;
      }

      .hero-search .search-icon {
        display: none;
      }

      .hero-search input {
        width: 100%;
        text-align: center;
        background: rgba(255, 255, 255, 0.10);
        border-radius: 16px;
        padding: 0 14px;
      }

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

      .hero-stats,
      .stock-status,
      .trust-grid,
      .recommend-grid {
        grid-template-columns: 1fr;
      }

      .section {
        padding: 56px 0;
      }

      .section-head {
        display: block;
      }

      .news-row {
        grid-template-columns: 1fr;
        gap: 10px;
      }

      .news-arrow {
        display: none;
      }

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

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

      .fixed-cta {
        align-items: stretch;
        flex-direction: column;
        border-radius: 20px;
      }

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

    @media (max-width: 520px) {
      .brand-title {
        max-width: 170px;
      }

      .brand-subtitle {
        display: none;
      }

      .btn {
        min-height: 44px;
        padding: 0 15px;
      }

      .nav-actions .btn-primary {
        display: none;
      }

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

      .flash-track {
        grid-auto-columns: 86%;
      }

      .stock-panel,
      .steps-wrap,
      .recommend-wrap,
      .price-wrap {
        padding: 18px;
        border-radius: 24px;
      }

      .flash-card,
      .price-card,
      .step-card,
      .recommend-card,
      .stock-card {
        border-radius: 22px;
      }

      .faq-question {
        padding: 18px;
        font-size: 16px;
      }

      .faq-answer {
        padding: 0 18px 20px;
      }
    }