/* ========================================================
   有道翻译 · 渐变科技风 · 第6套样式
   ======================================================== */
:root {
  --c-p1: #6366F1;
  --c-p2: #8B5CF6;
  --c-p3: #EC4899;
  --c-ink: #1A1A2E;
  --c-text-dim: #6B7280;
  --c-bg: #FBFAFF;
  --c-surface: #FFFFFF;
  --c-border: #EAE6F7;
  --grad: linear-gradient(120deg, var(--c-p1), var(--c-p2), var(--c-p3));
  --radius: 18px;
  --max-width: 1160px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  background: var(--c-bg);
  color: var(--c-ink);
  line-height: 1.75;
  font-size: 15.5px;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ============ 导航：悬浮圆角胶囊 ============ */
.site-header { position: sticky; top: 14px; z-index: 100; }
.nav-wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 70px; margin-top: 14px; padding: 0 12px 0 24px;
  background: rgba(255,255,255,0.85); backdrop-filter: blur(12px);
  border: 1px solid var(--c-border); border-radius: 999px;
  box-shadow: 0 10px 30px rgba(99,102,241,0.10);
}
.logo { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; }
.logo svg { width: 32px; height: 32px; }
.logo .grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a { padding: 10px 18px; border-radius: 999px; font-size: 14px; font-weight: 600; color: var(--c-text-dim); transition: color .2s, background .2s; }
.main-nav a:hover { color: var(--c-ink); }
.main-nav a.active { color: #fff; background: var(--grad); }
.nav-cta { padding: 11px 24px; border-radius: 999px; background: var(--c-ink); color: #fff; font-weight: 700; font-size: 13.5px; border: none; cursor: pointer; transition: transform .15s, box-shadow .15s; }
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 10px 20px rgba(26,26,46,0.25); }
.nav-cta:disabled { opacity: .7; cursor: default; transform: none; }

/* ============ Hero ============ */
.hero { padding: 70px 0 40px; text-align: center; position: relative; overflow: hidden; }
.hero::before { content:""; position:absolute; top:-140px; left:50%; transform:translateX(-50%); width:640px; height:420px; background: radial-gradient(circle, rgba(139,92,246,0.16), transparent 70%); pointer-events:none; }
.hero-inner { position: relative; z-index: 1; }
.hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 8px 18px; border-radius: 999px; background: var(--c-surface); border: 1px solid var(--c-border); font-size: 13px; font-weight: 700; margin-bottom: 26px; box-shadow: 0 6px 18px rgba(99,102,241,0.10); }
.hero-badge svg { width: 15px; height: 15px; }
.hero h1 { font-size: 48px; font-weight: 800; line-height: 1.3; max-width: 800px; margin: 0 auto 20px; }
.hero h1 .grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { font-size: 16.5px; color: var(--c-text-dim); max-width: 600px; margin: 0 auto 34px; }
.hero-actions { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; gap: 8px; padding: 15px 32px; border-radius: 14px; font-size: 15.5px; font-weight: 700; border: none; cursor: pointer; transition: transform .15s, box-shadow .15s; }
.btn svg { width: 19px; height: 19px; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 14px 30px rgba(139,92,246,0.32); }
.btn-primary:hover { transform: translateY(-3px); }
.btn-primary:disabled { opacity: .75; cursor: default; transform: none; }
.btn-outline { background: var(--c-surface); color: var(--c-ink); border: 1.5px solid var(--c-border); }
.btn-outline:hover { border-color: var(--c-p2); color: var(--c-p2); }

/* ============ 平台下载前置（Hero 之后立刻出现） ============ */
.platform-front { padding: 20px 0 70px; }
.platform-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.platform-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 26px 20px; text-align: center; transition: transform .2s, box-shadow .2s; position: relative; overflow: hidden; }
.platform-card:hover { transform: translateY(-6px); box-shadow: 0 20px 40px rgba(99,102,241,0.16); }
.platform-card::before { content:""; position:absolute; top:0; left:0; right:0; height:4px; background: var(--grad); }
.platform-icon { width: 54px; height: 54px; border-radius: 16px; background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(236,72,153,0.12)); display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; }
.platform-icon svg { width: 27px; height: 27px; color: var(--c-p2); }
.platform-card h4 { font-size: 15.5px; margin-bottom: 6px; }
.platform-card p { font-size: 12.5px; color: var(--c-text-dim); margin-bottom: 18px; min-height: 36px; }
.btn-block { width: 100%; justify-content: center; padding: 12px 0; font-size: 13.5px; border-radius: 12px; }

/* ============ 通用区块 ============ */
.section { padding: 76px 0; }
.section-head { text-align: center; max-width: 620px; margin: 0 auto 46px; }
.section-head .tag { display: inline-block; padding: 6px 16px; border-radius: 999px; background: linear-gradient(120deg, rgba(99,102,241,0.10), rgba(236,72,153,0.10)); color: var(--c-p2); font-size: 12.5px; font-weight: 700; margin-bottom: 14px; }
.section-head h2 { font-size: 30px; font-weight: 800; margin-bottom: 12px; }
.section-head p { color: var(--c-text-dim); font-size: 14.5px; }

/* ============ 特性卡片：渐变边框网格 ============ */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 30px 26px; transition: transform .2s, box-shadow .2s; }
.feature-card:hover { transform: translateY(-5px); box-shadow: 0 18px 36px rgba(99,102,241,0.14); }
.feature-icon { width: 50px; height: 50px; border-radius: 14px; background: var(--grad); display: flex; align-items: center; justify-content: center; margin-bottom: 20px; }
.feature-icon svg { width: 25px; height: 25px; color: #fff; }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--c-text-dim); }

/* ============ 数据统计 ============ */
.stats-band { background: var(--grad); border-radius: var(--radius); padding: 40px 50px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
.stats-band .s-item { text-align: center; flex: 1; min-width: 140px; color: #fff; }
.stats-band .s-item b { display: block; font-size: 30px; font-weight: 800; }
.stats-band .s-item span { font-size: 12.5px; opacity: .88; }

/* ============ 评价与对比交错：评价卡片行 ============ */
.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.review-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 24px; }
.review-stars { display: flex; gap: 3px; margin-bottom: 12px; }
.review-stars svg { width: 15px; height: 15px; color: var(--c-p3); }
.review-card p { font-size: 14px; margin-bottom: 16px; }
.review-user { display: flex; align-items: center; gap: 10px; }
.review-avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--grad); display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 700; font-size: 13px; }
.review-user b { font-size: 13.5px; display: block; }
.review-user span { font-size: 12px; color: var(--c-text-dim); }

/* ============ 对比表格 ============ */
.compare-table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--c-border); }
table.compare-table { width: 100%; border-collapse: collapse; background: var(--c-surface); min-width: 620px; }
.compare-table th, .compare-table td { padding: 16px 20px; text-align: center; border-bottom: 1px solid var(--c-border); font-size: 13.5px; }
.compare-table th { background: linear-gradient(120deg, rgba(99,102,241,0.06), rgba(236,72,153,0.06)); font-weight: 700; }
.compare-table td:first-child, .compare-table th:first-child { text-align: left; font-weight: 600; }
.compare-table .col-youdao { background: rgba(139,92,246,0.06); color: var(--c-p2); font-weight: 700; }
.tag-yes { color: var(--c-p2); font-weight: 700; }
.tag-no { color: #C74B6A; }

/* ============ 详细功能 ============ */
.detail-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.detail-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 28px; }
.detail-card .d-tag { display: inline-block; font-size: 12px; font-weight: 700; color: var(--c-p2); margin-bottom: 10px; }
.detail-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.detail-card p { color: var(--c-text-dim); font-size: 14px; }

/* ============ FAQ ============ */
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: 14px; overflow: hidden; }
.faq-item summary { padding: 20px 24px; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; font-weight: 700; font-size: 15px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .faq-icon { width: 22px; height: 22px; border-radius: 50%; background: linear-gradient(120deg, rgba(99,102,241,0.12), rgba(236,72,153,0.12)); color: var(--c-p2); display:flex;align-items:center;justify-content:center; flex-shrink: 0; transition: transform .2s; }
.faq-item summary .faq-icon svg { width: 12px; height: 12px; }
.faq-item[open] summary .faq-icon { transform: rotate(45deg); }
.faq-item .faq-body { padding: 0 24px 20px; color: var(--c-text-dim); font-size: 14px; }

/* ============ CTA ============ */
.cta-band { background: var(--grad); border-radius: var(--radius); padding: 56px; text-align: center; color: #fff; }
.cta-band h2 { font-size: 28px; font-weight: 800; margin-bottom: 12px; }
.cta-band p { opacity: .92; margin-bottom: 28px; font-size: 15px; }
.cta-band .btn-primary { background: #fff; color: var(--c-p2); box-shadow: none; }
.cta-band .btn-primary:hover { transform: translateY(-2px); }

/* ============ 下载页专用 ============ */
.download-hero { padding: 56px 0 20px; text-align: center; }
.download-main-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 40px; max-width: 620px; margin: 0 auto; box-shadow: 0 20px 50px rgba(99,102,241,0.14); position: relative; overflow: hidden; }
.download-main-card::before { content:""; position:absolute; top:0; left:0; right:0; height:5px; background: var(--grad); }
.version-meta { display: flex; justify-content: center; gap: 24px; margin: 18px 0 26px; flex-wrap: wrap; }
.version-meta div { text-align: center; }
.version-meta b { display: block; font-size: 18px; }
.version-meta span { font-size: 12px; color: var(--c-text-dim); }

.steps-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.step-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: 14px; padding: 22px 16px; text-align: center; }
.step-card .num { display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 50%; background: var(--grad); color: #fff; font-weight: 700; font-size: 13px; margin-bottom: 12px; }
.step-card h4 { font-size: 14px; margin-bottom: 6px; }
.step-card p { font-size: 12.5px; color: var(--c-text-dim); }

.req-table-wrap { border: 1px solid var(--c-border); border-radius: var(--radius); overflow: hidden; }
table.req-table { width: 100%; border-collapse: collapse; background: var(--c-surface); }
.req-table th, .req-table td { padding: 14px 20px; font-size: 13px; border-bottom: 1px solid var(--c-border); text-align: left; }
.req-table th { background: linear-gradient(120deg, rgba(99,102,241,0.06), rgba(236,72,153,0.06)); }

.changelog-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.changelog-card { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: 14px; padding: 24px; }
.changelog-card .cv { color: var(--c-p2); font-weight: 800; font-size: 16px; }
.changelog-card .cd { color: var(--c-text-dim); font-size: 12.5px; margin-bottom: 10px; }
.changelog-card ul { padding-left: 18px; list-style: disc; }
.changelog-card li { font-size: 13.5px; color: var(--c-text-dim); margin-bottom: 6px; }

.security-band { display: flex; gap: 20px; background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius); padding: 28px 32px; }
.security-band svg { width: 40px; height: 40px; color: var(--c-p2); flex-shrink: 0; }
.security-band h4 { margin-bottom: 6px; }
.security-band p { font-size: 13.5px; color: var(--c-text-dim); }

/* ============ 中文页专用 ============ */
.article-content { max-width: 740px; margin: 0 auto; }
.article-content h2 { font-size: 23px; margin: 40px 0 14px; font-weight: 800; }
.article-content h2:first-child { margin-top: 0; }
.article-content h3 { font-size: 17px; margin: 24px 0 10px; font-weight: 700; color: var(--c-p2); }
.article-content p { color: var(--c-text-dim); margin-bottom: 14px; }
.article-content ul { padding-left: 20px; list-style: disc; margin-bottom: 14px; }
.article-content li { margin-bottom: 6px; color: var(--c-text-dim); }
.tip-box { background: linear-gradient(120deg, rgba(99,102,241,0.06), rgba(236,72,153,0.06)); border-radius: 14px; padding: 18px 22px; margin: 20px 0; font-size: 14px; border: 1px solid var(--c-border); }

/* ============ 页脚 ============ */
.site-footer { background: var(--c-ink); color: rgba(255,255,255,0.68); padding: 54px 0 28px; margin-top: 20px; }
.footer-top { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; padding-bottom: 30px; border-bottom: 1px solid rgba(255,255,255,0.12); }
.footer-brand { max-width: 320px; }
.footer-brand .logo { color: #fff; margin-bottom: 12px; }
.footer-brand p { font-size: 13px; }
.footer-links { display: flex; gap: 50px; }
.footer-col h5 { color: #fff; font-size: 13.5px; margin-bottom: 14px; }
.footer-col a { display: block; font-size: 13px; margin-bottom: 9px; color: rgba(255,255,255,0.6); }
.footer-col a:hover { color: #fff; }
.footer-bottom { margin-top: 22px; font-size: 12px; line-height: 1.9; text-align: center; }
.footer-security { display: flex; align-items: center; justify-content: center; gap: 8px; margin-bottom: 8px; }
.footer-security svg { width: 15px; height: 15px; color: var(--c-p3); }

@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

@media (max-width: 980px) {
  .platform-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
  .detail-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: repeat(3, 1fr); }
  .changelog-cards { grid-template-columns: 1fr; }
  .stats-band { justify-content: flex-start; }
  .main-nav { display: none; }
}
@media (max-width: 640px) {
  .hero h1 { font-size: 32px; }
  .platform-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { flex-direction: column; }
  .stats-band { flex-direction: column; }
}