/* =========================================================================
   Printer 法律条款页样式
   privacy-policy.html / terms-of-service.html 共享
   纯 HTML5 + CSS3，无 JS、无前端框架、无 CSS 框架
   ========================================================================= */

/* ---------- 1. 设计 Token（与落地页保持一致） ---------- */
:root {
  --color-bg:            #F5F9FE;
  --color-bg-soft:       #E3F2FD;
  --color-surface:       #FFFFFF;
  --color-primary:       #007AFF;
  --color-primary-hover: #0051D5;
  --color-primary-soft:  rgba(0, 122, 255, 0.10);
  --color-text:          #1A1F2C;
  --color-text-soft:     #5A6473;
  --color-text-muted:    #8A93A3;
  --color-border:        #E5EAF0;

  --radius-card: 16px;
  --radius-pill: 999px;
  --radius-sm:    8px;

  --shadow-card: 0 4px 16px rgba(20, 40, 80, 0.06);
  --shadow-nav:  0 1px 0 rgba(20, 40, 80, 0.04);

  --container-max: 860px;
  --nav-height:   60px;

  --font-sans: -apple-system, "SF Pro Text", "Helvetica Neue",
               "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Menlo", "Consolas", monospace;
}

/* ---------- 2. 全局重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
h1, h2, h3, h4, p, ul, ol, figure, table { margin: 0; padding: 0; }
ul, ol { list-style: none; }
a { color: var(--color-primary); text-decoration: none; transition: color .15s ease; }
a:hover { color: var(--color-primary-hover); }
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---------- 3. 顶部导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-height);
  background: rgba(245, 249, 254, 0.90);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--color-border);
}
.nav__inner {
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.nav__back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-soft);
  font-size: 14px;
  font-weight: 500;
}
.nav__back::before {
  content: "";
  width: 8px; height: 8px;
  border-left: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
}
.nav__back:hover { color: var(--color-primary); }
.nav__title {
  font-weight: 700;
  font-size: 16px;
  color: var(--color-text);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 18px;
}
.nav__links a { font-size: 14px; color: var(--color-text-soft); font-weight: 500; }
.nav__links a:hover { color: var(--color-primary); }
.lang-switch {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-soft);
  padding: 5px 11px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
}
.lang-switch:hover { border-color: var(--color-primary); color: var(--color-primary); }

@media (max-width: 640px) {
  .nav__links a:not(.lang-switch) { display: none; }
  .nav__title { display: none; }
}

/* ---------- 4. 主体布局 ---------- */
.article {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 56px 24px 80px;
}
.article__header {
  padding: 32px 0 24px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 32px;
}
.article__eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.article__title {
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 12px;
}
.article__meta {
  font-size: 14px;
  color: var(--color-text-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.article__meta strong { color: var(--color-text); font-weight: 600; }

/* ---------- 5. 正文排版 ---------- */
.prose h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 40px 0 16px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}
.prose h2:first-child { border-top: none; padding-top: 0; }
.prose h3 {
  font-size: 19px;
  font-weight: 700;
  margin: 28px 0 12px;
}
.prose p { margin: 0 0 16px; color: var(--color-text); }
.prose p,
.prose li { font-size: 15.5px; line-height: 1.75; }
.prose ul,
.prose ol {
  margin: 0 0 20px;
  padding-left: 24px;
  list-style: disc;
}
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 8px; color: var(--color-text-soft); }
.prose li strong { color: var(--color-text); }
.prose a { text-decoration: underline; text-underline-offset: 2px; }

/* ---------- 6. 表格 ---------- */
.prose table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  margin: 0 0 24px;
  box-shadow: var(--shadow-card);
  font-size: 14px;
}
.prose thead {
  background: linear-gradient(180deg, var(--color-bg-soft), #DCEEFF);
}
.prose th,
.prose td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.prose th {
  font-weight: 700;
  color: var(--color-text);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.prose tbody tr:last-child td { border-bottom: none; }
.prose td { color: var(--color-text-soft); line-height: 1.6; }
.prose td strong { color: var(--color-text); }

@media (max-width: 600px) {
  .prose table { display: block; }
  .prose thead { display: none; }
  .prose tr {
    display: block;
    padding: 14px 16px;
    border-bottom: 1px solid var(--color-border);
  }
  .prose tr:last-child { border-bottom: none; }
  .prose td {
    display: block;
    padding: 4px 0;
    border-bottom: none;
  }
  .prose td::before {
    content: attr(data-label);
    display: block;
    font-size: 11px;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 2px;
  }
}

/* ---------- 7. 高亮 / 占位符 / 注意 ---------- */
.placeholder {
  display: inline-block;
  background: #FFF6E0;
  color: #B27A00;
  padding: 1px 8px;
  border-radius: 4px;
  font-weight: 600;
  font-size: 0.95em;
  border: 1px dashed #E6B33C;
}
.notice {
  background: var(--color-primary-soft);
  border-left: 4px solid var(--color-primary);
  padding: 14px 18px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 0 0 24px;
  color: var(--color-text);
  font-size: 14px;
  line-height: 1.7;
}
.notice strong { color: var(--color-primary); }

/* 关键摘要框：首屏要点速览 */
.keynotes {
  background: var(--color-surface);
  border: 1px solid rgba(0, 122, 255, 0.22);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  margin: 0 0 28px;
  box-shadow: var(--shadow-card);
}
.keynotes__title {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
  margin-bottom: 10px;
}
.keynotes ul {
  margin: 0 !important;
  padding-left: 20px !important;
}
.keynotes li {
  font-size: 14.5px !important;
  margin-bottom: 6px !important;
}

/* 章节内小标题（h2 之下） */
.prose h3.subhead {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  margin: 24px 0 10px;
}

/* 条款编号列表内部强调段落 */
.prose ol.plain {
  list-style: decimal;
}
.prose ul.tight li { margin-bottom: 4px; }

/* ---------- 8. 目录与跳转 ---------- */
.toc {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px 28px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-card);
}
.toc__title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}
.toc ol {
  list-style: decimal;
  padding-left: 20px;
  margin: 0;
}
.toc li {
  font-size: 14px;
  margin-bottom: 6px;
}
.toc a { color: var(--color-text-soft); }
.toc a:hover { color: var(--color-primary); }

/* ---------- 9. 联系方式卡 ---------- */
.contact {
  margin-top: 56px;
  padding: 28px 32px;
  background: linear-gradient(135deg, #fff 0%, #F2F8FF 100%);
  border: 1px solid rgba(0, 122, 255, 0.18);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}
.contact h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
}
.contact p { margin: 0; color: var(--color-text-soft); font-size: 14px; line-height: 1.7; }
.contact a { font-weight: 600; }

/* ---------- 10. 页脚 ---------- */
.footer {
  background: #0E1420;
  color: rgba(255, 255, 255, 0.75);
  padding: 40px 0 24px;
}
.footer .container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.footer__info {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer__info-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 14px;
  line-height: 1.6;
}
.footer__info-label {
  flex-shrink: 0;
  color: rgba(255, 255, 255, 0.5);
  font-weight: 500;
  min-width: 92px;
}
.footer__info-value {
  color: rgba(255, 255, 255, 0.85);
  word-break: break-all;
}
.footer__info-value:hover {
  color: #fff;
  text-decoration: underline;
}
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  padding-top: 16px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}
.footer__bottom a {
  color: rgba(255, 255, 255, 0.65);
  margin: 0 4px;
}
.footer__bottom a:hover {
  color: #fff;
}

/* ---------- 11. 减少动画 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
}