/* 有道翻译 — 官方正版下载中心 */

:root {
  --primary: #4C5FFF;
  --primary-dark: #3A46E0;
  --primary-light: #EEF0FF;
  --ai-grad: linear-gradient(270deg, #816FF1 0%, #6663F7 55%, #7583FF 100%);
  --gold-grad: linear-gradient(270deg, #FFD8B7 0%, #FFE2C1 100%);
  --hero-grad: linear-gradient(160deg, #EFF1FF 0%, #F7F8FF 45%, #FFFFFF 100%);

  --text-primary: #14152B;
  --text-secondary: #656B85;
  --text-tertiary: #A0A5BD;

  --border: #ECEDF5;
  --bg: #FFFFFF;
  --bg-soft: #F6F7FC;

  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-xl: 28px;
  --radius-pill: 60px;

  --shadow-md: 0 8px 24px rgba(41, 47, 105, 0.08);
  --shadow-lg: 0 20px 48px rgba(41, 47, 105, 0.12);

  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; }
ul { list-style: none; margin: 0; padding: 0; }
img, svg { display: block; }

/* ---------- Top nav ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 32px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 9px; flex-shrink: 0; min-width: 116px; }
.brand-mark { width: 30px; height: 30px; }
.brand-word { font-size: 16px; font-weight: 700; }
.nav-links { display: flex; align-items: center; gap: 6px; background: var(--bg-soft); padding: 4px; border-radius: var(--radius-pill); }
.nav-links a { font-size: 14px; color: var(--text-secondary); padding: 8px 16px; border-radius: var(--radius-pill); }
.nav-links a.active { background: var(--bg); color: var(--text-primary); font-weight: 600; box-shadow: var(--shadow-md); }
.btn-vip { background: var(--gold-grad); color: #7A4A12; font-size: 13px; font-weight: 700; padding: 9px 18px; border-radius: var(--radius-pill); border: none; display: flex; align-items: center; gap: 5px; }

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  max-width: 1080px;
  margin: 18px auto 0;
  padding: 0 24px;
  font-size: 13px;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb a { color: var(--text-secondary); }
.breadcrumb a:hover { color: var(--primary); }

/* ---------- Hero ---------- */
.hero { background: var(--hero-grad); padding: 28px 24px 56px; text-align: center; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 600; color: var(--primary);
  background: var(--primary-light); padding: 6px 14px; border-radius: var(--radius-pill);
  margin-bottom: 16px;
}
.hero-title { font-size: 32px; font-weight: 800; margin: 0 0 12px; letter-spacing: -0.5px; }
.hero-sub { font-size: 15px; color: var(--text-secondary); margin: 0 auto; max-width: 640px; line-height: 1.7; }

/* ---------- Platform cards ---------- */
.section { max-width: 1080px; margin: 0 auto; padding: 56px 24px; }
.section-title { font-size: 24px; font-weight: 800; text-align: center; margin: 0 0 8px; }
.section-sub { text-align: center; color: var(--text-secondary); font-size: 14px; margin: 0 0 36px; }

.download-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 18px; }
.download-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  background: var(--bg);
  display: flex;
  flex-direction: column;
}
.download-icon {
  width: 50px; height: 50px; border-radius: 14px;
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px;
}
.download-icon svg { width: 24px; height: 24px; }
.download-card h3 { font-size: 16px; font-weight: 700; margin: 0 0 4px; }
.download-meta { font-size: 12px; color: var(--text-tertiary); margin-bottom: 4px; }
.download-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin: 8px 0 18px; flex: 1; }
.btn-primary {
  background: var(--primary); color: #fff; border: none; border-radius: var(--radius-pill);
  padding: 12px 20px; font-size: 14px; font-weight: 700; width: 100%;
}
.btn-primary.pending { background: var(--bg-soft); color: var(--text-tertiary); cursor: not-allowed; border: 1px dashed var(--border); }
.btn-secondary {
  border: 1px solid var(--border); background: var(--bg); color: var(--text-secondary);
  border-radius: var(--radius-pill); padding: 10px 18px; font-size: 13px; font-weight: 600; width: 100%; margin-top: 8px;
}

/* ---------- Platform detail (SEO copy) sections ---------- */
.platform-section { border-top: 1px solid var(--border); padding: 44px 0; }
.platform-row { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; }
.platform-row.reverse { direction: rtl; }
.platform-row.reverse > * { direction: ltr; }
.platform-copy h2 { font-size: 21px; font-weight: 800; margin: 0 0 12px; }
.platform-copy p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; margin: 0 0 14px; }
.platform-copy ul { margin: 0 0 18px; }
.platform-copy li {
  font-size: 13px; color: var(--text-secondary); padding-left: 20px; position: relative; margin-bottom: 8px;
}
.platform-copy li::before {
  content: ""; position: absolute; left: 0; top: 7px; width: 6px; height: 6px; border-radius: 50%; background: var(--primary);
}
.platform-visual {
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.platform-visual-icon {
  width: 64px; height: 64px; border-radius: 18px;
  background: var(--ai-grad); color: #fff;
  display: flex; align-items: center; justify-content: center;
}
.platform-visual-icon svg { width: 30px; height: 30px; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 10px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 4px 20px;
  background: var(--bg);
}
.faq-item summary {
  cursor: pointer;
  padding: 16px 0;
  font-size: 14px;
  font-weight: 600;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  font-size: 18px;
  color: var(--text-tertiary);
  font-weight: 400;
}
.faq-item[open] summary::after { content: "–"; }
.faq-item p { font-size: 13px; color: var(--text-secondary); line-height: 1.8; margin: 0 0 16px; }

/* ---------- Trust strip ---------- */
.trust-strip {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  padding: 28px 24px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
.trust-item { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-secondary); }
.trust-item svg { width: 18px; height: 18px; color: var(--primary); }

.footer { border-top: 1px solid var(--border); padding: 32px 24px; text-align: center; font-size: 12px; color: var(--text-tertiary); }
.footer .footer-links { display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; margin-bottom: 10px; }
.footer .footer-links a { color: var(--text-secondary); }
.footer .disclaimer { margin-top: 8px; color: var(--text-tertiary); font-size: 11px; }

.pending-note {
  display: inline-block;
  margin-top: 6px;
  font-size: 11px;
  color: var(--text-tertiary);
}

@media (max-width: 860px) {
  .navbar {
    padding: 12px 16px;
  }
  .nav-links {
    display: none;
  }
  .navbar .btn-vip {
    padding: 6px 12px;
    font-size: 12px;
  }
  .breadcrumb {
    padding: 10px 16px;
    font-size: 12px;
  }
  .hero {
    padding: 32px 16px 20px;
  }
  .hero-eyebrow {
    font-size: 11.5px;
    padding: 4px 10px;
  }
  .hero-title {
    font-size: 22px;
    line-height: 1.35;
  }
  .hero-sub {
    font-size: 13px;
    line-height: 1.6;
  }
  .trust-strip {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 16px;
  }
  .trust-item {
    font-size: 12px;
  }
  .download-grid {
    grid-template-columns: 1fr !important;
    gap: 12px;
  }
  .download-card {
    padding: 20px 16px;
  }
  .platform-row, .platform-row.reverse {
    grid-template-columns: 1fr !important;
    direction: ltr !important;
    gap: 18px;
    padding: 24px 16px;
  }
  .platform-copy h2 {
    font-size: 18px;
    line-height: 1.35;
  }
  .platform-copy ul {
    padding-left: 18px;
    font-size: 13px;
  }
  .platform-visual {
    min-height: 140px;
  }
  .section {
    padding: 28px 16px;
  }
  .section-title {
    font-size: 20px;
  }
  .section-sub {
    font-size: 13px;
  }
  .faq-list {
    gap: 8px;
  }
  .faq-item summary {
    font-size: 14px;
    padding: 13px 14px;
  }
  .faq-item p {
    font-size: 13px;
    padding: 0 14px 14px;
  }
  .footer {
    padding: 24px 16px;
  }
}

.brand-logo {
  height: 26px;
  width: auto;
  aspect-ratio: 1280 / 285;
  display: block;
  max-width: none;
  object-fit: contain;
}