/* ============================================================
   intlab58官网 — 全站样式
   取值来源：design/style-guide/design-tokens.md（唯一来源，禁止硬编码）
   风格基准：Google Developers + Hugging Face + Raspberry Pi
   ============================================================ */

/* ---------- Design Tokens（design-tokens.md） ---------- */
:root {
  /* 品牌色 */
  --color-primary: #1162E6;
  --color-primary-hover: #0D4FC1;
  --color-primary-soft: #E9F1FF;
  --color-accent: #188038;
  --color-accent-soft: #E6F4EA;
  --color-warm: #F9AB00;
  --color-warm-soft: #FEF7E0;

  /* 中性色 */
  --color-text-primary: #202124;
  --color-text-secondary: #5F6368;
  --color-text-tertiary: #80868B;
  --color-border: #DADCE0;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8F9FA;
  --color-bg-code: #F1F3F4;

  /* 渐变 */
  --gradient-hero: linear-gradient(135deg, #E9F1FF 0%, #FFFFFF 55%, #E6F4EA 100%);
  --gradient-icon-blue: linear-gradient(135deg, #1E6EF7, #0F5FD9);

  /* 字体（默认拉丁/西里尔；各语种覆写见下方 html[lang] 规则） */
  --font-sans: "Google Sans", "Roboto", "Segoe UI", system-ui, sans-serif;
  --font-mono: "Roboto Mono", "JetBrains Mono", Consolas, monospace;

  /* 间距 */
  --space-1: 4px; --space-2: 8px; --space-3: 16px; --space-4: 24px;
  --space-5: 32px; --space-6: 48px; --space-7: 64px; --space-8: 96px;

  /* 圆角 */
  --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px; --radius-full: 999px;

  /* 阴影 */
  --shadow-card: 0 1px 2px rgba(60,64,67,.08), 0 1px 3px rgba(60,64,67,.10);
  --shadow-card-hover: 0 4px 12px rgba(60,64,67,.16);
  --shadow-focus: 0 0 0 3px rgba(17,98,230,.30);

  --wrap: 1200px;
  --header-h: 68px;
}

/* ---------- Reset / Base ---------- */
*, *::before, *::after { box-sizing: border-box; }
/* D-01 修复：隐藏态抽屉 translateX(100%) 不再撑出横向滚动 */
html, body { overflow-x: hidden; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-text-secondary);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-hover); }
h1, h2, h3, h4 { color: var(--color-text-primary); line-height: 1.25; margin: 0 0 .5em; font-weight: 600; }
h1 { font-size: clamp(2rem, 4.5vw, 3rem); letter-spacing: -.01em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
:focus-visible { outline: none; box-shadow: var(--shadow-focus); border-radius: var(--radius-sm); }
::selection { background: var(--color-primary-soft); }
[id] { scroll-margin-top: calc(var(--header-h) + 16px); }

/* ---------- 多语言：字体栈 / 行高（i18n-rtl.md §2 §3） ---------- */
html[lang="zh-Hans"] {
  --font-sans: "Google Sans", "Roboto", "PingFang SC", "HarmonyOS Sans SC",
               "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
}
html[lang="ja"] {
  --font-sans: "Google Sans", "Roboto", "Hiragino Kaku Gothic ProN", "Yu Gothic",
               "Meiryo", "MS PGothic", "Segoe UI", system-ui, sans-serif;
}
html[lang="ko"] {
  --font-sans: "Google Sans", "Roboto", "Apple SD Gothic Neo", "Malgun Gothic",
               "Noto Sans KR", "Segoe UI", system-ui, sans-serif;
}
html[lang="ar"], html[lang="fa"] {
  --font-sans: "Segoe UI", "Dubai", "Geeza Pro", "Noto Sans Arabic",
               Tahoma, system-ui, sans-serif;
}
html[lang="ur"] {
  --font-sans: "Urdu Typesetting", "Jameel Noori Nastaleeq", "Noto Nastaliq Urdu",
               "Segoe UI", "Dubai", "Noto Sans Arabic", Tahoma, system-ui, sans-serif;
}
html[lang="hi"] {
  --font-sans: "Nirmala UI", "Kohinoor Devanagari", "Noto Sans Devanagari",
               "Segoe UI", system-ui, sans-serif;
}
/* 行高：长复合词/西里尔/天城文/声调/阿拉伯延伸 */
html[lang="de"] body, html[lang="ru"] body, html[lang="hi"] body,
html[lang="vi"] body, html[lang="zh-Hans"] body, html[lang="ja"] body,
html[lang="ko"] body { line-height: 1.6; }
html[lang="ar"] body, html[lang="fa"] body { line-height: 1.7; }
html[lang="ur"] body { line-height: 1.8; }
html[lang="de"] h1, html[lang="de"] h2, html[lang="de"] h3, html[lang="de"] h4,
html[lang="ru"] h1, html[lang="ru"] h2, html[lang="ru"] h3, html[lang="ru"] h4 { line-height: 1.3; }
html[lang="ar"] h1, html[lang="ar"] h2, html[lang="ar"] h3, html[lang="ar"] h4,
html[lang="fa"] h1, html[lang="fa"] h2, html[lang="fa"] h3, html[lang="fa"] h4,
html[lang="ur"] h1, html[lang="ur"] h2, html[lang="ur"] h3, html[lang="ur"] h4 { line-height: 1.5; }
/* 型号/代码/数字在 RTL 文本中保持 LTR 隔离（i18n-rtl.md §5.2） */
[dir="rtl"] .v, [dir="rtl"] .news-meta, [dir="rtl"] .article-meta time,
[dir="rtl"] .arch-node small { unicode-bidi: isolate; direction: ltr; }

/* ---------- 品牌保护（TC-016/TC-017）：品牌词不做大小写转换 ---------- */
.eyebrow .brand { text-transform: none; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--space-4); }
.section { padding: var(--space-8) 0; }
.section--surface { background: var(--color-bg-alt); }

/* 眉题 */
.eyebrow {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.eyebrow--accent { color: var(--color-accent); }
.section-head { max-width: 680px; margin-bottom: var(--space-6); }
.section-head p { color: var(--color-text-secondary); font-size: 1.05rem; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 12px var(--space-4);
  border-radius: var(--radius-full);
  font-weight: 500;
  font-size: .95rem;
  border: 1px solid transparent;
  transition: background .12s ease, color .12s ease, transform .16s ease-out, box-shadow .16s ease-out;
  cursor: pointer;
  min-height: 44px;
}
.btn:hover { transform: translateY(-2px); }
.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-hover); color: #fff; }
.btn--ghost { border-color: var(--color-border); color: var(--color-text-primary); background: var(--color-bg); }
.btn--ghost:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn--accent { background: var(--color-accent); color: #fff; }
.btn--accent:hover { background: #146c2e; color: #fff; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(255, 255, 255, .95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.nav { display: flex; align-items: center; height: var(--header-h); gap: var(--space-3); }
.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-inline-end: auto;
}
.logo:hover { color: var(--color-text-primary); }
.logo-mark {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  display: inline-block;
  flex-shrink: 0;
}
.nav-links { display: flex; align-items: center; gap: var(--space-1); list-style: none; margin: 0; padding: 0; }
.nav-links > li { position: relative; }
.nav-links a.nav-item {
  display: inline-block;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-weight: 500;
  font-size: .95rem;
}
.nav-links a.nav-item:hover { background: var(--color-bg-alt); }
.nav-links a.nav-item[aria-current="page"] { color: var(--color-primary); background: var(--color-primary-soft); }

/* 下拉菜单 */
.dropdown {
  position: absolute;
  top: calc(100% + var(--space-2));
  inset-inline-start: 0;
  min-width: 280px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card-hover);
  padding: var(--space-2);
  list-style: none;
  margin: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity .12s ease, transform .12s ease, visibility .12s;
}
.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
  display: block;
  padding: 10px var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: .9rem;
}
.dropdown a:hover { background: var(--color-bg-alt); color: var(--color-text-primary); }
.dropdown a strong { display: block; color: var(--color-text-primary); font-size: .93rem; font-weight: 500; }
.dropdown a span { color: var(--color-text-tertiary); font-size: .82rem; }

/* 汉堡菜单（移动端） */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  width: 44px; height: 44px;
  cursor: pointer;
  border-radius: var(--radius-sm);
}
.nav-toggle:hover { background: var(--color-bg-alt); }
.nav-toggle span, .nav-toggle::before, .nav-toggle::after {
  content: "";
  display: block;
  width: 20px; height: 2px;
  background: var(--color-text-primary);
  margin: 4px auto;
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: var(--space-8) 0;
  overflow: hidden;
  background: var(--gradient-hero);
}
.hero .wrap { position: relative; }
.hero h1 { max-width: 760px; }
.hero h1 em { font-style: normal; color: var(--color-primary); }
.hero .lede { font-size: 1.15rem; color: var(--color-text-secondary); max-width: 640px; margin-bottom: var(--space-5); }
.hero-actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.hero-note { margin-top: var(--space-6); color: var(--color-text-tertiary); font-size: .85rem; letter-spacing: .04em; }
.hero-note b { color: var(--color-text-secondary); font-weight: 500; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: var(--space-4); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: var(--space-4);
  position: relative;
  transition: transform .16s ease-out, box-shadow .16s ease-out;
  display: flex;
  flex-direction: column;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-card-hover); }
a.card { color: inherit; }
a.card:hover { color: inherit; }
.card .icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  flex-shrink: 0;
}
.card .icon--green { background: var(--color-accent-soft); color: var(--color-accent); }
.card .icon--warm { background: var(--color-warm-soft); color: #b06000; }
.card h3 { font-size: 1.2rem; margin-bottom: var(--space-2); }
.card p { color: var(--color-text-secondary); font-size: .93rem; margin-bottom: 0; }
.card .card-link {
  margin-top: var(--space-3);
  font-weight: 500;
  font-size: .9rem;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.card .card-link::after { content: "→"; transition: transform .16s ease-out; }
.card:hover .card-link::after { transform: translateX(4px); }
[dir="rtl"] .card .card-link::after,
[dir="rtl"] .card:hover .card-link::after { transform: scaleX(-1); }
[dir="rtl"] .card:hover .card-link::after { transform: scaleX(-1) translateX(4px); }
.card--tint { background: var(--color-bg-alt); border-color: transparent; box-shadow: none; }

/* 方向区块锚点卡（pcba 公版方案页） */
.dir-block { margin-bottom: var(--space-7); }
.dir-block:last-of-type { margin-bottom: 0; }
.dir-block h2 { display: flex; align-items: center; gap: var(--space-3); }

/* 方案条目卡内的规格表 */
.spec-list { list-style: none; margin: var(--space-3) 0 0; padding: 0; font-size: .88rem; color: var(--color-text-secondary); }
.spec-list li { display: flex; gap: var(--space-2); padding: 6px 0; border-top: 1px dashed var(--color-border); }
.spec-list li:first-child { border-top: 0; }
.spec-list .k { color: var(--color-text-tertiary); min-width: 6em; flex-shrink: 0; }
.spec-list .v { font-family: var(--font-mono); font-size: .82rem; overflow-wrap: anywhere; }

/* 占位标记 */
.badge-demo {
  display: inline-block;
  font-size: .74rem;
  font-weight: 500;
  letter-spacing: .04em;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  background: var(--color-warm-soft);
  color: #b06000;
  vertical-align: middle;
}
.tag { display: inline-block; font-size: .78rem; font-weight: 500; padding: 3px 12px; border-radius: var(--radius-full); background: var(--color-primary-soft); color: var(--color-primary); }
.tag--green { background: var(--color-accent-soft); color: var(--color-accent); }
.tag--warm { background: var(--color-warm-soft); color: #b06000; }

/* ---------- 图片占位 ---------- */
.ph-media {
  border-radius: var(--radius-md);
  background: var(--color-bg-code);
  aspect-ratio: 4 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  font-size: .84rem;
  overflow: hidden;
}
.ph-media img { width: 100%; height: 100%; object-fit: cover; }
.ph-media--wide { aspect-ratio: 16 / 8; }
.ph-media--tall { aspect-ratio: 4 / 5; }

/* ---------- 分栏 / 架构图 ---------- */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: var(--space-6); align-items: center; }
.split.reverse { direction: rtl; }
.split.reverse > * { direction: ltr; }

/* About 页事实信息卡（entity / address） */
.about-facts { align-self: center; }
.about-facts .facts { display: grid; gap: var(--space-4); margin: 0; }
.about-facts .fact { display: grid; gap: 6px; }
.about-facts dt { font-size: .76rem; font-weight: 600; letter-spacing: .05em; text-transform: uppercase; color: var(--color-text-tertiary); }
.about-facts dd { margin: 0; color: var(--color-text-primary); font-size: .95rem; line-height: 1.55; }
[dir="rtl"] .about-facts dt { letter-spacing: 0; text-transform: none; }

.arch-flow {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.arch-node {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px var(--space-3);
  font-size: .92rem;
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
}
.arch-node .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--color-primary); flex-shrink: 0; }
.arch-node .dot--green { background: var(--color-accent); }
.arch-node .dot--warm { background: var(--color-warm); }
.arch-node small { color: var(--color-text-tertiary); margin-inline-start: auto; font-family: var(--font-mono); font-size: .74rem; text-align: end; }
.arch-arrow { text-align: center; color: var(--color-primary); font-size: 1.1rem; line-height: .6; opacity: .7; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-md); }
table.data { width: 100%; border-collapse: collapse; font-size: .92rem; background: var(--color-bg); }
table.data th, table.data td { padding: 14px var(--space-4); text-align: start; border-bottom: 1px solid var(--color-border); vertical-align: top; }
table.data th { background: var(--color-bg-alt); color: var(--color-text-primary); font-weight: 500; white-space: nowrap; }
table.data tr:last-child td { border-bottom: 0; }
table.data td .v { font-family: var(--font-mono); font-size: .82rem; }

/* ---------- 时间线（服务流程 / 实施流程） ---------- */
.timeline { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.timeline li { counter-increment: step; position: relative; padding: 0 0 var(--space-5); padding-inline-start: 66px; }
.timeline li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  inset-inline-start: 0; top: 0;
  width: 44px; height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-weight: 600;
  display: flex; align-items: center; justify-content: center;
}
.timeline li::after { content: ""; position: absolute; inset-inline-start: 21px; top: 48px; bottom: 6px; width: 2px; background: var(--color-border); }
.timeline li:last-child::after { display: none; }
.timeline h3 { font-size: 1.05rem; margin-bottom: var(--space-1); }
.timeline p { color: var(--color-text-secondary); font-size: .93rem; margin: 0; }

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-3); }
.form-grid .full { grid-column: 1 / -1; }
label { display: block; font-weight: 500; font-size: .9rem; color: var(--color-text-primary); margin-bottom: 6px; }
input[type="text"], input[type="email"], input[type="tel"], textarea, select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: .95rem;
  color: var(--color-text-primary);
  background: var(--color-bg);
  transition: border-color .12s ease, box-shadow .12s ease;
}
input:focus, textarea:focus, select:focus { border-color: var(--color-primary); box-shadow: var(--shadow-focus); outline: none; }
textarea { resize: vertical; min-height: 130px; }
.form-note { background: var(--color-warm-soft); border-radius: var(--radius-sm); padding: 12px var(--space-3); font-size: .85rem; color: #7a5200; margin-top: var(--space-3); }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--color-primary-hover), var(--color-primary) 65%, #4285F4);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  inset-inline-end: -60px; top: -60px;
  width: 220px; height: 220px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .08);
}
.cta-band h2 { color: #fff; margin-bottom: var(--space-1); }
.cta-band p { color: rgba(255, 255, 255, .85); margin: 0; }
.cta-band .btn--primary { background: #fff; color: var(--color-primary); }
.cta-band .btn--primary:hover { background: var(--color-bg-alt); }

/* ---------- 面包屑 / 页头 ---------- */
.page-head {
  padding: var(--space-6) 0 var(--space-6);
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
}
.page-head h1 { margin-bottom: var(--space-2); }
.page-head .lede { color: var(--color-text-secondary); font-size: 1.08rem; max-width: 680px; margin: 0; }
.crumbs { font-size: .84rem; color: var(--color-text-tertiary); margin-bottom: var(--space-4); }
.crumbs a { color: var(--color-text-tertiary); }
.crumbs a:hover { color: var(--color-primary); }
.crumbs span { margin: 0 6px; color: var(--color-border); }

.subnav { display: flex; gap: 10px; flex-wrap: wrap; margin-top: var(--space-5); }
.subnav a {
  font-size: .88rem;
  padding: 7px var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-secondary);
}
.subnav a:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ---------- 数据点 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-4); }
.stat { padding: var(--space-4); background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-md); }
.stat b { font-size: 1.6rem; color: var(--color-primary); display: block; line-height: 1.3; margin-bottom: 4px; }
.stat span { color: var(--color-text-secondary); font-size: .9rem; }

/* ---------- 新闻卡片 / 文章 ---------- */
.news-card { padding: 0; overflow: hidden; }
.news-card .ph-media { border-radius: 0; border-bottom: 1px solid var(--color-border); }
.news-card .news-body { padding: var(--space-4); display: flex; flex-direction: column; flex: 1; }
.news-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .8rem;
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-2);
  font-family: var(--font-mono);
}
.news-card h3 { font-size: 1.05rem; margin-bottom: var(--space-2); }
.news-card p { font-size: .9rem; color: var(--color-text-secondary); margin: 0; flex: 1; }
.news-card .card-link { margin-top: var(--space-3); }

.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: var(--space-6); }
.filter-bar button {
  font-family: var(--font-sans);
  font-size: .9rem;
  font-weight: 500;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text-secondary);
  cursor: pointer;
  min-height: 38px;
}
.filter-bar button:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-bar button.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.news-item.hidden { display: none; }

/* 文章正文 */
.article { max-width: 760px; }
.article-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  color: var(--color-text-tertiary);
  font-size: .88rem;
  margin-bottom: var(--space-5);
  font-family: var(--font-mono);
}
.article-body h2 { font-size: 1.4rem; margin-top: 2em; }
.article-body h3 { font-size: 1.15rem; margin-top: 1.8em; }
.article-body blockquote {
  margin: 1.6em 0;
  padding: var(--space-3) var(--space-4);
  border-inline-start: 4px solid var(--color-primary);
  background: var(--color-primary-soft);
  border-start-start-radius: 0;
  border-end-start-radius: 0;
  border-start-end-radius: var(--radius-sm);
  border-end-end-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}
.article-source { font-size: .88rem; color: var(--color-text-tertiary); margin-top: 2.5em; overflow-wrap: anywhere; }
/* 新闻署名块（原文标题/机构/作者/许可/链接）与免责声明 */
.article-attribution {
  margin-top: 2.5em;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: .88rem;
  color: var(--color-text-secondary);
}
.article-attribution dl { display: grid; gap: var(--space-2); margin: 0; }
.article-attribution dl > div { display: grid; grid-template-columns: minmax(120px, 170px) 1fr; gap: var(--space-3); }
.article-attribution dt { color: var(--color-text-tertiary); font-family: var(--font-mono); font-size: .78rem; line-height: 1.6; }
.article-attribution dd { margin: 0; overflow-wrap: anywhere; }
.article-attribution a { color: var(--color-primary); }
.article-note { margin: var(--space-4) 0 0; color: var(--color-text-tertiary); font-size: .82rem; }
.article-disclaimer {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  font-size: .85rem;
}
@media (max-width: 640px) {
  .article-attribution dl > div { grid-template-columns: 1fr; gap: 2px; }
}

.pager { display: flex; justify-content: space-between; gap: var(--space-4); margin-top: var(--space-6); padding-top: var(--space-5); border-top: 1px solid var(--color-border); }
.pager a { max-width: 46%; font-size: .92rem; color: var(--color-text-primary); }
.pager a small { display: block; color: var(--color-text-tertiary); font-size: .78rem; font-family: var(--font-mono); margin-bottom: 4px; }
.pager a.next { margin-inline-start: auto; text-align: end; }
.pager a:hover { color: var(--color-primary); }
.pager a:hover small { color: var(--color-primary); }

/* ---------- 页脚 ---------- */
.site-footer {
  background: #202124;
  color: #9aa0a6;
  margin-top: var(--space-8);
  padding: var(--space-7) 0 var(--space-5);
  font-size: .9rem;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: var(--space-6); margin-bottom: var(--space-6); }
.site-footer h4 { color: #fff; font-size: .95rem; margin-bottom: var(--space-3); }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin-bottom: 10px; }
.site-footer a { color: #9aa0a6; }
.site-footer a:hover { color: #fff; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.2rem; color: #fff; margin-bottom: var(--space-3); }
.footer-legal {
  border-top: 1px solid rgba(255, 255, 255, .12);
  padding-top: var(--space-4);
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
  color: #80868b;
  font-size: .82rem;
}
.footer-legal nav { display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* ---------- 动效（克制） ---------- */
@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.rise { animation: rise .24s ease-out both; }
.rise:nth-child(2) { animation-delay: .06s; }
.rise:nth-child(3) { animation-delay: .12s; }
.rise:nth-child(4) { animation-delay: .18s; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  inset-inline-end: var(--space-4);
  bottom: var(--space-4);
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-bg);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-card-hover);
  cursor: pointer;
  z-index: 60;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s, color .12s ease, border-color .12s ease;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { color: var(--color-primary); border-color: var(--color-primary); }

/* ---------- 响应式（≥1280 / 768-1279 / <768） ---------- */
@media (max-width: 1279px) {
  .section { padding: var(--space-7) 0; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: var(--space-5); }
  .split.reverse { direction: ltr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 767px) {
  .section { padding: var(--space-7) 0; }
  .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: var(--space-5); }
  .cta-band { padding: var(--space-5) var(--space-4); }

  /* 移动端导航 */
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    top: var(--header-h);
    inset-inline: 0;
    bottom: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-3) var(--space-4) var(--space-6);
    gap: var(--space-1);
    overflow-y: auto;
    border-top: 1px solid var(--color-border);
    transform: translateX(100%);
    transition: transform .25s ease;
  }
  [dir="rtl"] .nav-links { transform: translateX(-100%); }
  .nav-open .nav-links { transform: translateX(0); }
  .nav-links a.nav-item { font-size: 1.05rem; padding: 14px 10px; }
  .dropdown {
    position: static;
    opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: 0; border-inline-start: 2px solid var(--color-primary-soft);
    margin-inline-start: 12px; padding-inline-start: 12px;
    min-width: 0;
    display: none;
  }
  .has-dropdown:hover .dropdown, .has-dropdown:focus-within .dropdown { display: block; }
  /* D-02 修复：触屏点击手风琴（由 main.js 切换 .dropdown-open 与 aria-expanded） */
  .has-dropdown.dropdown-open .dropdown { display: block; }
  .has-dropdown > .nav-item { display: flex; align-items: center; justify-content: space-between; }
  .has-dropdown > .nav-item::after {
    content: "";
    width: 8px; height: 8px;
    border-right: 2px solid var(--color-text-tertiary);
    border-bottom: 2px solid var(--color-text-tertiary);
    transform: rotate(45deg);
    transition: transform .2s ease;
    margin-inline-start: var(--space-2);
    flex-shrink: 0;
  }
  .has-dropdown.dropdown-open > .nav-item::after { transform: rotate(225deg); }
  .nav-open .nav-toggle span { opacity: 0; }
  .nav-open .nav-toggle::before { transform: translateY(6px) rotate(45deg); }
  .nav-open .nav-toggle::after { transform: translateY(-6px) rotate(-45deg); }
}

/* ---------- 语言切换器（LanguageSwitcher，i18n-rtl.md §6） ---------- */
.lang-li { position: relative; display: flex; align-items: center; }
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  padding: 0 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: .85rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
}
.lang-switch:hover { background: var(--color-bg-alt); }
.lang-switch[aria-expanded="true"] { background: var(--color-primary-soft); border-color: var(--color-primary); color: var(--color-primary); }
.lang-switch .lang-code { letter-spacing: .04em; }
.lang-switch .lang-caret { width: 8px; height: 8px; border-inline-end: 2px solid currentColor; border-bottom: 2px solid currentColor; transform: rotate(45deg) translateY(-2px); flex-shrink: 0; }
.lang-panel {
  position: absolute;
  top: calc(100% + var(--space-2));
  inset-inline-end: 0;
  width: min(640px, calc(100vw - 32px));
  max-height: 480px;
  overflow-y: auto;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card-hover);
  padding: var(--space-4);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4) var(--space-4);
  z-index: 70;
}
.lang-panel[hidden] { display: none; }
.lang-group-title {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
  margin: 0 0 var(--space-2);
}
.lang-item {
  display: flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 10px;
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-size: .92rem;
  white-space: nowrap;
}
.lang-item:hover { background: var(--color-bg-alt); color: var(--color-text-primary); }
.lang-item .lang-code { margin-inline-start: auto; color: var(--color-text-tertiary); font-size: .78rem; font-family: var(--font-mono); }
.lang-item .lang-check { display: none; color: var(--color-primary); flex-shrink: 0; }
.lang-item[aria-current="true"] { background: var(--color-primary-soft); color: var(--color-primary); font-weight: 500; }
.lang-item[aria-current="true"] .lang-code { color: var(--color-primary); }
.lang-item[aria-current="true"] .lang-check { display: inline-flex; }
.lang-soon {
  font-size: 11px;
  line-height: 20px;
  padding: 0 8px;
  border-radius: var(--radius-full);
  background: var(--color-warm-soft);
  color: #b06000;
  white-space: nowrap;
  flex-shrink: 0;
}
.lang-item:focus-visible { box-shadow: var(--shadow-focus); background: var(--color-bg-alt); outline: none; }

/* 移动端：抽屉底部入口 + 二级全屏语种列表 */
.lang-entry { display: none; }
.lang-view {
  position: fixed;
  top: var(--header-h);
  inset-inline: 0;
  bottom: 0;
  background: var(--color-bg);
  z-index: 49;
  overflow-y: auto;
  padding: var(--space-3) var(--space-4) var(--space-6);
  transform: translateX(100%);
  transition: transform .25s ease;
  display: none;
}
[dir="rtl"] .lang-view { transform: translateX(-100%); }
.lang-view.lang-view-open { transform: translateX(0); }
.lang-back {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: none;
  border: none;
  padding: 10px 4px;
  font-family: var(--font-sans);
  font-size: .95rem;
  font-weight: 500;
  color: var(--color-text-primary);
  cursor: pointer;
  margin-bottom: var(--space-2);
}
.lang-view .lang-group-title {
  position: sticky;
  top: 0;
  background: var(--color-bg);
  padding: 10px 0 6px;
  z-index: 1;
}
.lang-view .lang-item { min-height: 48px; font-size: 1rem; }

/* T2 占位页提示条 */
.i18n-note {
  background: var(--color-bg-code);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 12px var(--space-3);
  font-size: .9rem;
  color: var(--color-text-secondary);
  margin: var(--space-4) 0;
}
.i18n-note a { font-weight: 500; }

@media (max-width: 1279px) {
  .lang-panel { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  .lang-switch, .lang-panel { display: none; }
  .lang-entry {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
    min-height: 48px;
    padding: 12px 10px;
    background: none;
    border: 0;
    border-top: 1px solid var(--color-border);
    font-family: var(--font-sans);
    font-size: 1.05rem;
    color: var(--color-text-primary);
    cursor: pointer;
    text-align: start;
  }
  .lang-entry .lang-entry-name { font-weight: 500; }
  .lang-entry .lang-caret { margin-inline-start: auto; width: 8px; height: 8px; border-inline-end: 2px solid var(--color-text-tertiary); border-bottom: 2px solid var(--color-text-tertiary); transform: rotate(45deg); }
  .lang-view { display: block; }
  .lang-li { display: block; }
}