/* ============================================================
   YUNXIAN 官网设计系统 v2 —— 东方编辑风
   纸白底 · 深墨蓝黑 · 灰青绿 · 铜棕 · 衬线大标题
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  --paper: #f3f3ef;           /* 纸白：页面底色 */
  --paper-2: #e8ecea;         /* 深一点的纸色 */
  --white: #ffffff;
  --ink: #0d1c24;             /* 深墨蓝黑 */
  --ink-2: #43545a;           /* 次级文字 */
  --muted: #7b8987;           /* 弱化文字 */
  --green: #78958f;           /* 灰青绿：主强调 */
  --green-2: #5f7e79;         /* 灰青绿：hover */
  --jade: #a7b5b0;            /* 浅灰青：深底强调 */
  --red: #a56b4f;             /* 铜棕：点缀 */
  --red-2: #c17a58;           /* 亮铜棕 */
  --line: rgba(13, 28, 36, 0.12);
  --dark: #0d1c24;             /* 深墨蓝黑：深色区块 */
  --dark-2: #142a33;           /* 深色卡片 */
  --dark-text: #f3f3ef;
  --dark-muted: #a7b5b0;
  --dark-line: rgba(243, 243, 239, 0.14);
  --serif: "Songti SC", "STSong", "Noto Serif SC", "SimSun", serif;
  --sans: "PingFang SC", -apple-system, "Helvetica Neue", "Microsoft YaHei", Arial, sans-serif;
  --width: 1200px;
  --gap: 80px;
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--sans); overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }
img { max-width: 100%; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-family: var(--serif); font-weight: 700; }
h3 { font-weight: 600; }
::selection { background: rgba(120, 149, 143, 0.22); }
:focus-visible { outline: 2px solid var(--green); outline-offset: 2px; }

.page { width: min(var(--width), calc(100% - 64px)); margin: 0 auto; }

/* 区块底色 */
.sec-light { background: var(--paper); color: var(--ink); }
.sec-white { background: var(--white); color: var(--ink); }
.sec-paper { background: var(--paper-2); color: var(--ink); }
.sec-dark { background: var(--dark); color: var(--dark-text); }
.sec { padding: 140px 0; }

/* 标题与引导 */
.kick, .eyebrow {
  color: var(--green); font-size: 11px; letter-spacing: 0.18em; line-height: 1.6;
}
.eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 28px; }
.sec-dark .kick, .sec-dark .eyebrow { color: var(--jade); }
.status-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--red);
  animation: pulse 2.2s infinite;
}
.title {
  margin: 0 0 28px; font-size: clamp(34px, 4.2vw, 58px);
  line-height: 1.12; letter-spacing: 0.01em;
}
.title span { color: var(--green); }
.sec-dark .title span { color: var(--jade); }
.lead { max-width: 580px; color: var(--ink-2); font-size: 16px; line-height: 1.9; }
.sec-dark .lead { color: var(--dark-muted); }

/* kicker + 内容 双栏布局 */
.split { display: grid; grid-template-columns: 0.72fr 1.28fr; gap: var(--gap); }

/* ---------- Header ---------- */
.header {
  position: fixed; z-index: 20; top: 0; left: 0; right: 0;
  display: flex; align-items: center; gap: 32px; height: 72px; padding: 0 32px;
  background: rgba(243, 243, 239, 0.82); backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent; transition: border-color 0.3s ease, background 0.3s ease;
}
.header.scrolled { background: rgba(243, 243, 239, 0.94); border-color: var(--line); }
.brand { display: inline-flex; align-items: center; gap: 11px; }
.brand-mark {
  display: block; flex: 0 0 30px; width: 30px; height: 30px;
  background: url("./assets/yunxian-mark.svg") center / contain no-repeat;
  transition: transform 0.3s ease;
}
.brand:hover .brand-mark { transform: translateY(-2px); }
.brand-copy { display: flex; flex-direction: column; gap: 3px; }
.brand-copy strong { font-size: 14px; line-height: 1; letter-spacing: 0.16em; }
.brand-copy small { color: var(--muted); font-size: 10px; letter-spacing: 0.12em; }
.nav { display: flex; gap: 26px; margin-left: auto; color: var(--ink-2); font-size: 13px; }
.nav a { transition: color 0.2s ease; white-space: nowrap; }
.nav a:hover { color: var(--ink); }
.nav a[aria-current="page"] { color: var(--ink); font-weight: 600; }
.menu-toggle {
  display: none; width: 40px; height: 40px; padding: 8px;
  border: 1px solid var(--line); border-radius: 999px;
  background: transparent; color: var(--ink); cursor: pointer;
}
.menu-toggle span { display: block; width: 18px; height: 1.5px; margin: 5px auto; background: currentColor; }

/* ---------- Buttons & links ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 46px; padding: 0 24px; border: 1px solid var(--ink); border-radius: 999px;
  font-size: 13px; letter-spacing: 0.02em; cursor: pointer;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}
.btn span { font-size: 15px; line-height: 0; }
.btn-primary { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--green); border-color: var(--green); color: #fff; }
.sec-dark .btn-primary { background: var(--jade); border-color: var(--jade); color: var(--dark); }
.sec-dark .btn-primary:hover { background: var(--dark-text); border-color: var(--dark-text); }
.btn-small { min-height: 40px; padding: 0 18px; font-size: 12.5px; }
.link {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--ink-2); transition: color 0.2s ease;
}
.link:hover { color: var(--green); }
.link-dark { color: var(--ink); border-bottom: 1px solid var(--ink); padding-bottom: 6px; }
.link-dark:hover { color: var(--green); border-color: var(--green); }
.sec-dark .link { color: var(--dark-muted); }
.sec-dark .link:hover { color: var(--jade); }
.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; }

/* ---------- Footer ---------- */
.footer { padding: 40px 0; background: var(--dark); color: var(--dark-text); }
.footer-grid { display: flex; align-items: center; flex-wrap: wrap; gap: 18px 40px; }
.footer-brand { display: inline-flex; align-items: center; gap: 12px; margin-right: auto; }
.footer-brand .brand-mark {
  flex-basis: 28px; width: 28px; height: 28px;
  background-image: url("./assets/yunxian-mark-light.svg");
}
.footer-brand strong { display: block; font-size: 12px; letter-spacing: 0.14em; }
.footer-brand small { color: var(--dark-muted); font-size: 10px; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 24px; color: var(--dark-muted); font-size: 11.5px; }
.footer-nav a:hover { color: var(--dark-text); }
.footer-contact { display: flex; gap: 24px; color: var(--dark-muted); font-size: 11.5px; }
.footer-contact a:hover { color: var(--jade); }
.footer-contact [data-year] { color: var(--jade); }

/* ---------- 通用组件 ---------- */

/* 分栏数据带 */
.band { border-bottom: 1px solid var(--line); }
.band-grid { display: grid; grid-template-columns: repeat(var(--cols, 3), 1fr); }
.band-grid > div { min-height: 128px; padding: 28px 28px 28px 0; border-right: 1px solid var(--line); margin-right: 0; }
.band-grid > div + div { padding-left: 28px; }
.band-grid > div:last-child { border-right: 0; }
.band-grid span { display: block; color: var(--green); font-size: 10px; letter-spacing: 0.16em; }
.band-grid strong { display: block; margin-top: 22px; font-family: var(--serif); font-size: 18px; font-weight: 700; }
.band-grid p { margin: 10px 0 0; color: var(--ink-2); font-size: 13px; line-height: 1.75; }
.band-flat .band-grid > div { min-height: 76px; display: flex; align-items: center; padding-top: 0; padding-bottom: 0; }
.band-flat .band-grid strong { margin-top: 0; font-family: var(--sans); font-size: 12px; font-weight: 400; color: var(--ink-2); letter-spacing: 0.08em; }

/* 编号行列表 */
.rows { margin-top: 80px; border-top: 1px solid var(--line); }
.sec-dark .rows { border-color: var(--dark-line); }
.row {
  display: grid; grid-template-columns: 76px 1fr auto; gap: 24px; align-items: center;
  min-height: 120px; padding: 22px 12px; margin: 0 -12px;
  border-bottom: 1px solid var(--line); transition: background 0.25s ease;
}
.sec-dark .row { border-color: var(--dark-line); }
.row:hover { background: rgba(255, 255, 255, 0.55); }
.sec-paper .row:hover, .sec-white .row:hover { background: rgba(13, 28, 36, 0.03); }
.sec-dark .row:hover { background: rgba(243, 243, 239, 0.04); }
.row > .no { color: var(--red); font-size: 11px; letter-spacing: 0.12em; align-self: start; padding-top: 8px; }
.row h3 { margin: 0 0 9px; font-size: 20px; }
.row p { max-width: 640px; margin: 0; color: var(--ink-2); font-size: 14px; line-height: 1.75; }
.sec-dark .row p { color: var(--dark-muted); }
.row .go { color: var(--green); font-size: 18px; transition: transform 0.25s ease; }
.sec-dark .row .go { color: var(--jade); }
.row:hover .go { transform: translate(4px, -4px); }

/* 卡片栅格（发丝线分隔） */
.cards { display: grid; grid-template-columns: repeat(var(--cols, 3), 1fr); gap: 1px; margin-top: 80px; background: var(--line); border: 1px solid var(--line); }
.sec-dark .cards { background: var(--dark-line); border-color: var(--dark-line); }
.card { min-height: 240px; padding: 30px; background: var(--white); transition: background 0.25s ease; }
.sec-light .card { background: var(--paper); }
.sec-paper .card { background: var(--paper-2); }
.sec-dark .card { background: var(--dark-2); }
.card > .no { display: block; color: var(--red); font-size: 11px; letter-spacing: 0.1em; }
.card > .tag { display: block; color: var(--green); font-size: 11px; letter-spacing: 0.12em; }
.sec-dark .card > .tag { color: var(--jade); }
.card h3 { margin: 56px 0 12px; font-family: var(--serif); font-size: 22px; font-weight: 700; }
.card p { max-width: 420px; margin: 0; color: var(--ink-2); font-size: 13.5px; line-height: 1.8; }
.sec-dark .card p { color: var(--dark-muted); }
.card .code { display: block; margin-top: 48px; color: var(--green); font-size: 12px; letter-spacing: 0.18em; font-weight: 600; }
.sec-dark .card .code { color: var(--jade); }
.card .code + h3 { margin-top: 10px; }

/* 可点击模块卡 */
.cards a.card { position: relative; color: inherit; }
.cards a.card:hover { background: var(--white); }
.sec-light .cards a.card:hover, .sec-paper .cards a.card:hover { background: rgba(255, 255, 255, 0.7); }
.cards a.card .go { position: absolute; right: 24px; bottom: 24px; color: var(--green); font-size: 17px; transition: transform 0.25s ease; }
.cards a.card:hover .go { transform: translate(3px, -3px); }

/* 信号条（4 栏） */
.strip { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 110px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.strip > div { display: grid; grid-template-columns: 34px 1fr; gap: 4px; padding: 24px 20px; border-right: 1px solid var(--line); }
.strip > div:first-child { padding-left: 0; }
.strip > div:last-child { border-right: 0; }
.strip .no { grid-row: span 2; color: var(--red); font-size: 12px; padding-top: 3px; }
.strip strong { font-family: var(--serif); font-size: 16px; font-weight: 700; }
.strip small { color: var(--muted); font-size: 11.5px; margin-top: 4px; }

/* 标签 */
.tags { display: flex; flex-wrap: wrap; gap: 10px; }
.tags span {
  padding: 9px 16px; border: 1px solid var(--line); border-radius: 999px;
  color: var(--ink-2); font-size: 12px; transition: border-color 0.2s ease, color 0.2s ease;
}
.tags span:hover { border-color: var(--green); color: var(--green); }

/* 流程（箭头串联） */
.flow { display: flex; align-items: stretch; margin-top: 80px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sec-dark .flow { border-color: var(--dark-line); }
.flow > div { flex: 1; min-height: 150px; padding: 24px 20px 22px 0; }
.flow > div:not(:first-child) { padding-left: 20px; }
.flow > div.hi { background: rgba(120, 149, 143, 0.08); }
.sec-dark .flow > div.hi { background: rgba(167, 181, 176, 0.10); }
.flow .no { display: block; color: var(--red); font-size: 10px; letter-spacing: 0.16em; }
.flow strong { display: block; margin-top: 28px; font-family: var(--serif); font-size: 17px; font-weight: 700; }
.flow small { display: block; margin-top: 8px; color: var(--ink-2); font-size: 12px; line-height: 1.6; }
.sec-dark .flow small { color: var(--dark-muted); }
.flow > i { display: flex; align-items: center; color: var(--green); font-size: 20px; font-style: normal; }
.sec-dark .flow > i { color: var(--jade); }

/* 输入 / 输出 */
.io { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; margin-top: 30px; background: var(--line); border: 1px solid var(--line); }
.io > div { min-height: 104px; padding: 20px; background: var(--white); }
.sec-light .io > div { background: var(--paper); }
.io span { display: block; color: var(--green); font-size: 10px; letter-spacing: 0.14em; }
.io strong { display: block; margin-top: 18px; font-size: 13px; line-height: 1.65; font-weight: 600; }
.sec-dark .io { background: var(--dark-line); border-color: var(--dark-line); }
.sec-dark .io > div { background: var(--dark-2); }
.sec-dark .io span { color: var(--jade); }

/* 计划动作条 */
.pipe { margin-top: 30px; padding: 18px 20px; border: 1px solid var(--line); border-radius: 10px; background: rgba(255, 255, 255, 0.5); }
.sec-dark .pipe { border-color: var(--dark-line); background: rgba(243, 243, 239, 0.04); }
.pipe > span { display: block; color: var(--green); font-size: 10px; letter-spacing: 0.14em; }
.sec-dark .pipe > span { color: var(--jade); }
.pipe > div { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 14px; }
.pipe b { font-size: 13px; font-weight: 600; }
.pipe i { color: var(--red); font-style: normal; }
.sec-dark .pipe i { color: var(--jade); }

/* 键值说明列表 */
.kv { border-top: 1px solid var(--line); }
.kv > div { display: grid; grid-template-columns: 150px 1fr; gap: 22px; padding: 18px 0; border-bottom: 1px solid var(--line); font-size: 13.5px; }
.kv b { font-weight: 600; }
.kv span { color: var(--ink-2); line-height: 1.7; }
.sec-dark .kv, .sec-dark .kv > div { border-color: var(--dark-line); }
.sec-dark .kv span { color: var(--dark-muted); }

/* 产品截图框（浏览器卡片） */
.shot {
  margin: 0; background: var(--white); border: 1px solid var(--line);
  border-radius: 14px; overflow: hidden;
  box-shadow: 0 30px 70px rgba(13, 28, 36, 0.10), 0 4px 14px rgba(13, 28, 36, 0.05);
}
.shot-bar {
  position: relative; display: flex; justify-content: space-between; align-items: center;
  min-height: 40px; padding: 0 16px 0 64px; background: #f4f1e9;
  border-bottom: 1px solid var(--line); color: var(--muted); font-size: 10.5px; letter-spacing: 0.05em;
}
.shot-bar::before {
  content: ""; position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
  width: 8px; height: 8px; border-radius: 50%; background: var(--red-2);
  box-shadow: 14px 0 0 #d8cfc0, 28px 0 0 #d8cfc0;
}
.shot-bar span:last-child { color: var(--green); letter-spacing: 0.1em; }
.shot img { display: block; width: 100%; height: auto; }
.shot figcaption, .shot-foot {
  display: flex; justify-content: space-between; gap: 14px;
  padding: 13px 16px; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 10.5px;
}
.shot figcaption span:last-child { color: var(--red); }
.shot-on-light { box-shadow: 0 20px 50px rgba(13, 28, 36, 0.08); }

/* AI 示例块（深底卡片内） */
.ai-box { margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--dark-line); }
.ai-box small { display: block; color: var(--dark-muted); font-size: 10px; letter-spacing: 0.1em; }
.ai-box strong { display: block; margin-top: 8px; color: var(--dark-text); font-size: 13px; line-height: 1.55; font-weight: 600; }
.ai-box .ans { margin-top: 14px; color: var(--red-2); }
.ai-box b { display: block; margin-top: 6px; color: var(--dark-muted); font-size: 11px; font-weight: 400; line-height: 1.65; }

/* 说明便签（深底） */
.note { display: flex; gap: 22px; align-items: center; margin-top: 36px; padding: 18px 22px; background: rgba(167, 181, 176, 0.10); border-left: 2px solid var(--jade); border-radius: 0 10px 10px 0; }
.note strong { flex: 0 0 auto; font-size: 12.5px; }
.note span { color: var(--dark-muted); font-size: 12px; line-height: 1.6; }

/* ---------- 页面级模块 ---------- */

/* 首页 Hero */
.hero { min-height: 100dvh; padding: 160px 0 36px; display: flex; flex-direction: column; justify-content: space-between; }
.hero-grid { display: grid; grid-template-columns: minmax(320px, 0.85fr) minmax(520px, 1.15fr); align-items: center; gap: var(--gap); flex: 1; }
.hero h1 { max-width: 620px; margin-bottom: 28px; font-size: clamp(46px, 5.4vw, 80px); line-height: 1.08; }
.hero h1 em { color: var(--red); font-style: normal; }
.hero-note { display: flex; align-items: center; gap: 14px; margin-top: 60px; color: var(--muted); font-size: 11px; letter-spacing: 0.1em; }
.hero-note span:first-child { color: var(--red); }
.hero-visual { position: relative; min-width: 0; padding: 26px 0 50px; }
.hero-visual .visual-label { position: absolute; top: 0; left: 2px; color: var(--muted); font-size: 10.5px; letter-spacing: 0.16em; }
.callout {
  position: absolute; z-index: 2; display: flex; flex-direction: column; gap: 4px;
  min-width: 158px; padding: 14px 16px; background: var(--white);
  border: 1px solid var(--line); border-radius: 10px;
  box-shadow: 0 16px 40px rgba(13, 28, 36, 0.10);
}
.callout .no { color: var(--red); font-size: 10px; letter-spacing: 0.14em; }
.callout strong { font-size: 13px; }
.callout small { color: var(--muted); font-size: 10px; line-height: 1.5; }
.callout-tr { top: 10%; right: -12px; }
.callout-bl { bottom: 2%; left: -14px; }
.hero-foot { display: flex; justify-content: space-between; padding-top: 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: 10px; letter-spacing: 0.14em; }
.hero-foot b { margin-left: 8px; color: var(--green); }

/* 内页 Hero */
.inner-hero { padding: 170px 0 100px; border-bottom: 1px solid var(--line); }
.inner-hero-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; align-items: end; gap: var(--gap); }
.inner-hero h1 { max-width: 800px; margin: 0 0 26px; font-size: clamp(42px, 5.2vw, 74px); line-height: 1.1; }
.inner-hero h1 em { color: var(--red); font-style: normal; }
.inner-index { justify-self: end; padding-bottom: 6px; font-family: var(--serif); color: var(--red); font-size: 54px; line-height: 0.9; }
.inner-index span { display: block; margin-top: 16px; font-family: var(--sans); color: var(--muted); font-size: 11px; letter-spacing: 0.12em; }

/* 产品页 Hero */
.p-hero { padding: 160px 0 100px; border-bottom: 1px solid var(--line); }
.p-hero-grid { display: grid; grid-template-columns: 0.88fr 1.12fr; gap: var(--gap); align-items: center; }
.p-hero h1 { margin: 22px 0 26px; font-size: clamp(42px, 5vw, 72px); line-height: 1.1; }
.p-hero h1 span { color: var(--green); }

/* 文章页 */
.article-hero { padding: 170px 0 100px; border-bottom: 1px solid var(--line); }
.article-hero h1 { max-width: 860px; margin: 0 0 26px; font-size: clamp(38px, 4.6vw, 64px); line-height: 1.14; }
.article-hero h1 em { color: var(--red); font-style: normal; }
.article-body-inner { width: min(760px, calc(100% - 64px)); margin: 0 auto; }
.article-meta { margin-bottom: 56px; color: var(--green); font-size: 11px; letter-spacing: 0.14em; }
.article-body h2 { margin: 56px 0 18px; font-size: clamp(26px, 3.4vw, 36px); line-height: 1.2; }
.article-body h2:first-of-type { margin-top: 0; }
.article-body p:not(.article-meta) { max-width: 700px; color: #3e4442; font-size: 16.5px; line-height: 1.95; }
.article-next { display: flex; justify-content: space-between; gap: 20px; margin-top: 80px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--green); font-size: 12.5px; }
.article-next a:hover { color: var(--red); }

/* 文章列表 */
.article-list { margin-top: 80px; border-top: 1px solid var(--line); }
.article-list a { display: grid; grid-template-columns: 140px 1fr 30px; gap: 26px; align-items: center; min-height: 96px; border-bottom: 1px solid var(--line); transition: background 0.25s ease; }
.article-list a:hover { background: rgba(255, 255, 255, 0.55); }
.article-list a span { color: var(--green); font-size: 11px; letter-spacing: 0.06em; }
.article-list strong { font-family: var(--serif); font-size: 17.5px; font-weight: 700; }
.article-list i { color: var(--red); font-style: normal; font-size: 18px; }

/* 证据区（截图 + 侧栏） */
.evidence { display: grid; grid-template-columns: 1.55fr 0.45fr; gap: 32px; margin-top: 80px; }
.evidence-side { display: flex; flex-direction: column; justify-content: space-between; min-width: 0; }
.evidence-side-copy { padding: 6px 0 26px; border-top: 1px solid var(--line); }
.evidence-side-copy .tag { display: block; margin: 16px 0 44px; color: var(--green); font-size: 10px; letter-spacing: 0.14em; }
.evidence-side-copy h3 { margin-bottom: 12px; font-family: var(--serif); font-size: 21px; }
.evidence-side-copy p { margin: 0; color: var(--ink-2); font-size: 13px; line-height: 1.75; }
.evidence-mobile { align-self: end; width: 72%; }

/* 表单 */
.form { padding: 34px; background: var(--white); border: 1px solid var(--line); border-radius: 16px; box-shadow: 0 20px 50px rgba(13, 28, 36, 0.06); }
.form label { display: block; margin-bottom: 18px; color: var(--ink-2); font-size: 11.5px; letter-spacing: 0.05em; }
.form input, .form select, .form textarea {
  display: block; width: 100%; margin-top: 8px; padding: 13px 15px;
  border: 1px solid var(--line); border-radius: 8px;
  background: var(--paper); color: var(--ink); font: inherit; font-size: 14px; outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form input:focus, .form select:focus, .form textarea:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(120, 149, 143, 0.16); }
.form textarea { resize: vertical; }
.form .btn { margin-top: 6px; }
.form-note { margin: 14px 0 0; color: var(--muted); font-size: 11px; line-height: 1.65; }

/* 联系页 / 演示页双栏 */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 90px; align-items: start; }
.contact-details { margin-top: 56px; border-top: 1px solid var(--line); }
.contact-details > div { display: grid; grid-template-columns: 105px 1fr; gap: 16px; padding: 17px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.contact-details span { color: var(--muted); }
.contact-details a, .contact-details strong { color: var(--green); font-weight: 600; }
.contact-details a:hover { color: var(--red); }

/* 模块段（产品页六个模块） */
.mod-grid { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: var(--gap); align-items: start; }
.mod-title > .kick { display: block; }
.mod-title h2 { margin: 22px 0 18px; font-size: clamp(30px, 3.6vw, 48px); line-height: 1.14; }
.mod-title p { max-width: 400px; margin: 0; color: var(--ink-2); font-size: 15px; line-height: 1.85; }
.sec-dark .mod-title p { color: var(--dark-muted); }

/* CTA 段 */
.cta h2 { max-width: 820px; margin: 22px 0 36px; }

/* 404 */
.notfound { min-height: 100vh; display: grid; place-items: center; padding: 32px; }
.notfound > div { max-width: 680px; width: 100%; }

/* ---------- 动效 ---------- */
.js .reveal { opacity: 1; transform: none; }
.js .reveal.is-visible { opacity: 1; transform: none; }
/* 首屏内容不能等待滚动观察器，否则用户打开页面时会看到空白首屏。 */
.js .hero .reveal,
.js .p-hero .reveal,
.js .inner-hero .reveal,
.js .article-hero .reveal { opacity: 1; transform: none; }
.reveal-delay { transition-delay: 0s; }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(193, 122, 88, 0.14); }
  50% { box-shadow: 0 0 0 8px rgba(193, 122, 88, 0); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important; animation-iteration-count: 1 !important;
    scroll-behavior: auto !important; transition-duration: 0.01ms !important;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  :root { --gap: 48px; }
  .page { width: min(100% - 40px, 720px); }
  .header { padding: 0 20px; }
  .nav, .header .btn { display: none; }
  .menu-toggle { display: block; margin-left: auto; }
  .header.menu-open .nav {
    position: absolute; top: 72px; left: 0; right: 0;
    display: flex; flex-direction: column; gap: 0; margin: 0;
    padding: 8px 20px 18px; background: rgba(243, 243, 239, 0.98);
    border-bottom: 1px solid var(--line);
  }
  .header.menu-open .nav a { padding: 14px 0; border-bottom: 1px solid var(--line); }

  .split, .hero-grid, .inner-hero-grid, .p-hero-grid, .mod-grid, .contact-grid, .evidence { grid-template-columns: 1fr; }
  .hero { padding-top: 130px; }
  .hero-grid { gap: 44px; align-items: start; }
  .hero-note { margin-top: 44px; }
  .inner-index { justify-self: start; font-size: 42px; }
  .inner-hero, .article-hero { padding: 140px 0 80px; }
  .sec { padding: 90px 0; }
  .strip { margin-top: 70px; }
  .rows, .article-list, .cards, .flow, .evidence { margin-top: 56px; }
  .cards { grid-template-columns: repeat(2, 1fr) !important; }
  .band-grid { grid-template-columns: 1fr !important; }
  .band-grid > div, .band-grid > div + div { min-height: 0; padding: 18px 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .band-grid > div:last-child { border-bottom: 0; }
  .band-grid strong { margin-top: 10px; }
  .band-flat .band-grid > div { padding: 14px 0; }
  .flow { flex-direction: column; }
  .flow > div, .flow > div:not(:first-child) { min-height: 0; padding: 18px 0; }
  .flow > i { transform: rotate(90deg); transform-origin: left center; height: 20px; }
  .evidence-mobile { width: 190px; align-self: start; }
  .footer-grid { flex-direction: column; align-items: flex-start; }
  .footer-brand { margin-right: 0; }
}

@media (max-width: 640px) {
  .page { width: calc(100% - 32px); }
  .brand-copy small { display: none; }
  .hero h1 { font-size: 42px; }
  .inner-hero h1 { font-size: 38px; }
  .title { font-size: 30px; }
  .cards { grid-template-columns: 1fr !important; }
  .card { min-height: 200px; }
  .card h3 { margin-top: 40px; }
  .strip { grid-template-columns: repeat(2, 1fr); }
  .strip > div, .strip > div:first-child { padding: 18px 14px; border-bottom: 1px solid var(--line); }
  .strip > div:nth-child(2n) { border-right: 0; }
  .strip > div:nth-last-child(-n + 2) { border-bottom: 0; }
  .row { grid-template-columns: 40px 1fr 20px; gap: 12px; min-height: 0; }
  .row h3 { font-size: 18px; }
  .kv > div { grid-template-columns: 1fr; gap: 5px; }
  .io { grid-template-columns: 1fr; }
  .article-list a { grid-template-columns: 1fr 20px; gap: 8px; padding: 16px 0; }
  .article-list a span { grid-column: 1 / -1; }
  .article-next { flex-direction: column; align-items: flex-start; }
  .callout { position: relative; inset: auto; min-width: 0; margin-top: 10px; }
  .hero-visual { padding-bottom: 12px; }
  .hero-foot { flex-direction: column; gap: 12px; }
  .contact-details > div { grid-template-columns: 88px 1fr; gap: 10px; }
  .form { padding: 22px; }
  .actions { align-items: flex-start; flex-direction: column; }
}