@font-face { font-family: "DM Sans"; src: url("fonts/dm-sans.ttf") format("truetype"); font-weight: 100 1000; font-display: swap; }
@font-face { font-family: "Space Grotesk"; src: url("fonts/space-grotesk.ttf") format("truetype"); font-weight: 300 700; font-display: swap; }
:root {
      --primary: #2A91FC;
      --primary-dark: #0f66c4;
      --secondary: #65b6ff;
      --accent: #0b5fb3;
      --background: #f3f8ff;
      --surface: #ffffff;
      --surface-soft: rgba(42, 145, 252, 0.06);
      --text-primary: #1e293b;
      --text-secondary: #475569;
      --text-muted: #64748b;
      --border: #d8ebff;
      --shadow-sm: 0 1px 3px rgba(11, 95, 179, 0.08);
      --shadow-md: 0 14px 28px rgba(11, 95, 179, 0.09);
      --shadow-lg: 0 24px 48px rgba(42, 145, 252, 0.18);
      --radius: 24px;
      --radius-sm: 16px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: "DM Sans", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
      background:
        linear-gradient(180deg, #f3f8ff 0%, #ffffff 48%, #f3f8ff 100%);
      color: var(--text-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

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

    .nav {
      position: fixed;
      inset: 0 0 auto;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.9);
    }

    .container {
      width: min(1120px, calc(100% - 32px));
      margin: 0 auto;
    }

    .nav-content {
      min-height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 700;
    }

    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 12px;
      display: block;
      object-fit: cover;
      box-shadow: var(--shadow-sm);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 24px;
      color: var(--text-secondary);
      font-size: 0.95rem;
      font-weight: 500;
    }

    .nav-links a:hover {
      color: var(--primary);
    }

    .nav-links a:focus-visible {
      outline: 3px solid rgba(42, 145, 252, 0.28);
      outline-offset: 4px;
    }

    .nav-cta {
      padding: 11px 18px;
      border-radius: 999px;
      background: var(--primary);
      color: #fff;
      box-shadow: 0 10px 25px rgba(42, 145, 252, 0.24);
    }

    .nav-links .nav-cta:hover,
    .nav-links .nav-cta:focus,
    .nav-links .nav-cta:focus-visible,
    .nav-links .nav-cta:active {
      color: #fff;
      background: var(--primary-dark);
    }

    .hero {
      padding: 132px 0 72px;
      position: relative;
      overflow: hidden;
      background:
        linear-gradient(135deg, rgba(42, 145, 252, 0.11) 0%, rgba(255, 255, 255, 0) 42%),
        linear-gradient(180deg, rgba(255, 255, 255, 0.78) 0%, rgba(255, 255, 255, 0) 100%);
    }

    .hero::before {
      content: "";
      position: absolute;
      inset: auto 0 0;
      height: 1px;
      background: linear-gradient(90deg, rgba(42, 145, 252, 0), rgba(42, 145, 252, 0.28), rgba(42, 145, 252, 0));
      pointer-events: none;
    }

    .hero-shell {
      position: relative;
      z-index: 1;
      max-width: 1120px;
      margin: 0 auto;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: minmax(0, 1fr);
      align-items: center;
      gap: 56px;
    }

    .hero-copy {
      max-width: 760px;
      margin-inline: auto;
      text-align: center;
    }

    h1,
    h2,
    h3 {
      font-family: "Space Grotesk", "DM Sans", sans-serif;
      letter-spacing: 0;
    }

    .hero h1 {
      font-size: clamp(3rem, 6vw, 5rem);
      line-height: 0.98;
      margin-bottom: 18px;
    }

    .hero h1 span {
      display: block;
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero-description {
      font-size: 1.12rem;
      line-height: 1.8;
      color: var(--text-secondary);
      max-width: 620px;
      margin: 0 0 28px;
    }

    .hero-features {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 0;
    }

    .hero-feature {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 11px 16px;
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.92);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      color: var(--text-secondary);
      font-size: 0.92rem;
      font-weight: 500;
    }

    .hero-feature-dot {
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--accent);
      flex: 0 0 auto;
    }

    .section {
      padding: 72px 0;
    }

    .section-tint {
      background: linear-gradient(135deg, rgba(42, 145, 252, 0.07) 0%, rgba(101, 182, 255, 0.07) 100%);
    }

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

    .section-head {
      max-width: 720px;
      text-align: center;
      margin: 0 auto 40px;
    }

    .section-head h2 {
      font-size: clamp(2rem, 4vw, 2.8rem);
      margin-bottom: 14px;
    }

    .section-head p {
      color: var(--text-secondary);
      font-size: 1.05rem;
      line-height: 1.75;
    }

    .grid {
      display: grid;
      gap: 20px;
    }

    .feature-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .feature-card,
    .advantage-card,
    .scenario-card {
      min-height: 100%;
    }

    .feature-card:hover,
    .advantage-card:hover,
    .scenario-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(42, 145, 252, 0.32);
    }

    .feature-card,
    .advantage-card,
    .scenario-card {
      transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    }

    .card-mark {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      background: rgba(42, 145, 252, 0.1);
      color: var(--primary);
      font-family: "Space Grotesk", sans-serif;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .card h3 {
      font-size: 1.22rem;
      margin-bottom: 10px;
      letter-spacing: 0;
    }

    .card p {
      color: var(--text-secondary);
    }

    .advantage-grid,
    .scenario-grid {
      grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .scenario-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 18px;
    }

    .scenario-tag {
      padding: 7px 12px;
      border-radius: 999px;
      background: rgba(42, 145, 252, 0.1);
      color: var(--primary);
      font-size: 0.82rem;
      font-weight: 600;
    }

    .cta {
      padding: 72px 0 80px;
    }

    .cta-card {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      border-radius: calc(var(--radius) + 4px);
      padding: 56px 32px;
      text-align: center;
      color: #fff;
      box-shadow: var(--shadow-lg);
      position: relative;
      overflow: hidden;
    }

    .cta-card::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(255, 255, 255, 0.18), rgba(255, 255, 255, 0)),
        repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.12) 0 1px, transparent 1px 16px);
      pointer-events: none;
    }

    .cta-card > * {
      position: relative;
      z-index: 1;
    }

    .cta-card h2 {
      font-size: clamp(2rem, 4vw, 2.8rem);
      margin-bottom: 14px;
    }

    .cta-card p {
      max-width: 680px;
      margin: 0 auto 24px;
      color: rgba(255, 255, 255, 0.92);
      line-height: 1.8;
    }

    .cta-links {
      display: flex;
      justify-content: center;
      gap: 14px;
      flex-wrap: wrap;
    }

    .btn-light {
      background: #fff;
      color: var(--primary);
    }

    .btn-outline {
      border: 1px solid rgba(255, 255, 255, 0.46);
      color: #fff;
    }

    .store-button {
      display: inline-block;
      transition: transform 0.2s ease;
    }

    .store-button:hover {
      transform: scale(1.05);
    }

    .store-button img {
      display: block;
      width: auto;
      height: 54px;
      object-fit: contain;
    }

    .footer {
      padding: 28px 0 44px;
      border-top: 1px solid var(--border);
      background: var(--surface);
    }

    .footer-content {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    .footer-links {
      display: flex;
      gap: 18px;
      flex-wrap: wrap;
      color: var(--text-secondary);
      font-size: 0.92rem;
    }

    .footer-copy {
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    @media (max-width: 760px) {
      .nav-links {
        display: none;
      }

      .hero {
        padding-top: 112px;
      }

      .hero-grid {
        grid-template-columns: 1fr;
        gap: 34px;
      }

      .hero-copy {
        text-align: center;
        margin: 0 auto;
      }

      .hero-description {
        margin-inline: auto;
      }

      .hero-features {
        justify-content: center;
      }



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

      .section,
      .cta {
        padding: 56px 0;
      }

      .cta-card {
        padding: 36px 24px;
      }

      .footer-content {
        flex-direction: column;
        text-align: center;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }

      *,
      *::before,
      *::after {
        transition: none !important;
      }
    }
/* 产品介绍与法律条款页面的布局样式。 */
body { font-synthesis: none; }
a:focus-visible { outline: 3px solid #0b5fb3; outline-offset: 5px; border-radius: 3px; }
a:hover { color: var(--primary-dark); }
.skip-link { position: fixed; top: -100px; left: 16px; z-index: 1100; padding: 10px 16px; background: white; border: 1px solid var(--border); border-radius: 8px; }
.skip-link:focus { top: 12px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.brand-mark { display: block; background: transparent; }
.brand-name { font-size: 19px; }
.hero h1 { font-size: clamp(40px, 5.2vw, 64px); line-height: 1.22; letter-spacing: -1px; }
.hero-description { max-width: 620px; margin-inline: auto; }
.hero-features { gap: 8px; margin-bottom: 26px; justify-content: center; }
.hero-feature { font-size: 13px; padding: 8px 12px; }
.hero-note { font-size: 12px; color: var(--text-muted); margin-top: 14px; }













.section-head h2 { font-size: clamp(28px, 3.6vw, 40px); line-height: 1.4; }
.section-head p { font-size: 16px; }
.card p { font-size: 15px; line-height: 1.85; }
section[id] { scroll-margin-top: 96px; }
.detail-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.detail-copy h2 { font-size: clamp(28px, 3.5vw, 38px); margin-bottom: 20px; line-height: 1.4; }
.detail-copy p { color: var(--text-secondary); line-height: 1.9; }
.detail-list { list-style: none; background: white; border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 8px 26px; }
.detail-list li { padding: 20px 0; }
.detail-list li + li { border-top: 1px solid var(--border); }
.detail-list strong { display: block; font-size: 16px; margin-bottom: 5px; }
.detail-list p { color: var(--text-secondary); font-size: 14px; }
.reference-note { max-width: 780px; margin: 32px auto 0; text-align: center; color: var(--text-muted); font-size: 13px; line-height: 1.9; }
.legal-page { background: #f7f8fa; }
.legal-shell { width: min(860px, 100%); margin: 0 auto; min-height: 100vh; background: white; padding: 32px 32px 0; }
.meta-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: nowrap; gap: 16px; margin-bottom: 24px; }
.meta-row time { color: #5a6774; font-size: 14px; white-space: nowrap; }
.legal-intro { color: #5a6774; font-size: 16px; line-height: 1.9; margin-bottom: 22px; }
.legal-page a { color: var(--primary-dark); text-decoration: underline; text-underline-offset: 4px; }
.policy-section { padding: 20px 0; scroll-margin-top: 20px; }
.policy-section h2 { color: #111a22; font-size: 23px; line-height: 1.5; margin-bottom: 12px; }
.policy-section p, .policy-section li, .policy-section dd { font-size: 15px; line-height: 1.95; color: #5a6774; }
.policy-section p + p { margin-top: 12px; }
.policy-section ul { padding-left: 20px; }
.policy-section li + li { margin-top: 10px; }
.policy-section strong { color: #334155; font-weight: 650; }
.data-list > div { padding: 16px 0; border-bottom: 1px solid #e7edf3; }
.data-list dt { font-size: 15px; font-weight: 650; margin-bottom: 5px; }
.data-list dd { margin: 0; }
.legal-footer { border-top: 1px solid #e7edf3; margin-top: 24px; padding: 24px 0 32px; display: flex; flex-wrap: wrap; gap: 18px; font-size: 13px; }
@media (max-width: 760px) {
 .nav-content { min-height: 68px; gap: 16px; }
 .nav-links { display: flex; gap: 16px; font-size: 13px; }
 .hero-grid { gap: 32px; }

.hero h1 { font-size: clamp(36px, 8vw, 52px); }
 .detail-layout { grid-template-columns: 1fr; gap: 28px; }
 .legal-shell { padding: 24px 20px 0; }
 .meta-row { gap: 10px; }
 .meta-row time { font-size: 13px; }
 .hero-note { margin-inline: auto; max-width: 300px; }
}
@media (max-width: 360px) {
 .nav-links { gap: 12px; font-size: 12px; }
 .brand-name { font-size: 17px; }
 .brand { gap: 8px; }
 .brand-mark { width: 32px; height: 32px; }

}