/* ============================================================
   GEO增长AI · 营销官网样式
   设计语言：spreadjam 皮（极简/大字体/产品即首屏）
             × peec.ai 骨（指标语言/证据感/浅色底）
             × g1geo 转化件（自助检测/客服矩阵）
   浅色为主，首屏与演示区用深色块制造节奏
   ============================================================ */

:root {
  --bg: #fafaf9;
  --paper: #ffffff;
  --ink: #17171c;
  --ink2: #45464e;
  --muted: #77787f;
  --line: #e7e6e1;
  --line2: #efeeea;
  --accent: #4f46e5;
  --accent-deep: #4338ca;
  --accent-soft: #eef0fe;
  --good: #0e9f6e;
  --bad: #e02424;
  --warn: #d97706;

  --dark: #101014;
  --dark2: #17171d;
  --dark3: #1f1f28;
  --dline: #2a2a35;
  --dtext: #f4f4f6;
  --dtext2: #b9bac2;
  --dmuted: #8b8c96;
  --daccent: #8b8ff8;

  --r: 16px;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --mono: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg); color: var(--ink);
  font-family: var(--sans); line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; }
::selection { background: #c7d2fe; }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 28px; }

/* ================= 顶部导航 ================= */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .25s, border-color .25s, backdrop-filter .25s;
  border-bottom: 1px solid transparent;
}
.nav .wrap { display: flex; align-items: center; gap: 30px; height: 62px; }
.nav .brand { display: flex; align-items: center; gap: 10px; text-decoration: none; flex: none; }
.nav .logo-mark {
  width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #fff; font-weight: 800; font-size: 15px; flex: none;
  box-shadow: 0 2px 8px rgba(79, 70, 229, .35);
}
.nav .logo-text { display: flex; flex-direction: column; line-height: 1.15; }
.nav .logo-text strong { font-size: 15px; letter-spacing: .01em; }
.nav .logo-text span { font-size: 10.5px; color: var(--dmuted); }
.nav .links { display: flex; gap: 26px; margin-left: 8px; }
.nav .links a { text-decoration: none; font-size: 13.5px; opacity: .82; transition: opacity .15s; }
.nav .links a:hover { opacity: 1; }
.nav .right { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.nav .login { text-decoration: none; font-size: 13.5px; opacity: .82; }
.nav .login:hover { opacity: 1; }

/* 深色 hero 上的导航：透明白字 */
.nav.over-dark { color: var(--dtext); }
.nav.over-dark .logo-text span { color: var(--dmuted); }
/* 滚出 hero 后：浅色实底 */
.nav.solid {
  background: rgba(250, 250, 249, .88);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line); color: var(--ink);
}
.nav.solid .logo-text span { color: var(--muted); }

/* ================= 按钮 ================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: none; cursor: pointer; text-decoration: none;
  font-family: var(--sans); font-weight: 600; font-size: 14.5px;
  padding: 11px 22px; border-radius: 11px; transition: transform .12s, box-shadow .15s, background .15s;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 4px 16px rgba(79, 70, 229, .3); }
.btn-primary:hover { background: var(--accent-deep); }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { border-color: #cfcec8; background: #fff; }
.btn-on-dark { background: rgba(255, 255, 255, .1); color: var(--dtext); border: 1px solid var(--dline); }
.btn-on-dark:hover { background: rgba(255, 255, 255, .16); }
.btn-white { background: #fff; color: var(--ink); }
.btn-white:hover { background: #f1f1f4; }
.btn-sm { padding: 8px 16px; font-size: 13px; border-radius: 9px; }
.btn-lg { padding: 14px 28px; font-size: 15.5px; border-radius: 12px; }
.btn-block { width: 100%; }

/* ================= 首屏 Hero（深色） ================= */
.hero {
  background: var(--dark); color: var(--dtext);
  padding: 138px 0 84px; position: relative; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(640px 340px at 82% 12%, rgba(99, 102, 241, .22), transparent 65%),
    radial-gradient(520px 300px at 8% 88%, rgba(14, 159, 110, .1), transparent 65%);
  pointer-events: none;
}
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero .kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 600; color: var(--daccent);
  background: rgba(139, 143, 248, .12); border: 1px solid rgba(139, 143, 248, .3);
  padding: 5px 13px; border-radius: 99px; margin-bottom: 22px;
}
.hero .kicker .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--daccent); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .35; } }
.hero h1 {
  font-size: clamp(34px, 4.4vw, 54px); line-height: 1.18;
  letter-spacing: -.02em; font-weight: 800;
}
.hero h1 em { font-style: normal; color: var(--daccent); }
.hero .sub { margin-top: 20px; font-size: 16px; color: var(--dtext2); max-width: 540px; }
.hero .sub b { color: var(--dtext); font-weight: 600; }
.hero .cta-row { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.hero .trust { margin-top: 18px; font-size: 12.5px; color: var(--dmuted); display: flex; align-items: center; gap: 7px; }
.hero .trust sv { color: var(--good); }

/* Hero 右侧：引擎覆盖条 */
.hero .engine-strip { margin-top: 44px; }
.hero .engine-strip .cap { font-size: 11.5px; color: var(--dmuted); letter-spacing: .08em; margin-bottom: 12px; }
.hero .engine-row { display: flex; flex-wrap: wrap; gap: 8px; }
.hero .engine-chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12.5px; color: var(--dtext2);
  border: 1px solid var(--dline); background: var(--dark2);
  padding: 6px 13px; border-radius: 99px;
}
.hero .engine-chip i { width: 7px; height: 7px; border-radius: 50%; }
.hero .engine-chip.off { opacity: .45; }

/* ================= Hero 检测卡片（浅色浮起） ================= */
.demo-card {
  background: var(--paper); color: var(--ink);
  border-radius: 20px; padding: 26px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .45), 0 2px 8px rgba(0, 0, 0, .25);
  border: 1px solid rgba(255, 255, 255, .08);
}
.demo-card .dc-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 4px; }
.demo-card .dc-title { font-size: 17px; font-weight: 800; letter-spacing: -.01em; }
.demo-card .dc-badge {
  font-size: 11px; font-weight: 700; color: var(--accent);
  background: var(--accent-soft); padding: 3px 9px; border-radius: 99px;
}
.demo-card .dc-sub { font-size: 12.5px; color: var(--muted); margin-bottom: 18px; }
.demo-card .field { margin-bottom: 12px; }
.demo-card label { display: block; font-size: 12px; font-weight: 600; color: var(--ink2); margin-bottom: 6px; }
.demo-card input {
  width: 100%; padding: 11px 14px; font-size: 14px; font-family: var(--sans);
  border: 1px solid var(--line); border-radius: 10px; background: #fbfbfa;
  transition: border-color .15s, box-shadow .15s; outline: none;
}
.demo-card input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79, 70, 229, .12); background: #fff; }
.demo-card input::placeholder { color: #b3b4ba; }
.demo-card .dc-engines { display: flex; flex-wrap: wrap; gap: 6px; margin: 4px 0 16px; }
.demo-card .dc-engine {
  display: inline-flex; align-items: center; gap: 6px; font-size: 11.5px; font-weight: 600;
  color: var(--ink2); border: 1px solid var(--line); border-radius: 99px; padding: 4px 10px;
  transition: all .2s;
}
.demo-card .dc-engine i { width: 6px; height: 6px; border-radius: 50%; }
.demo-card .dc-engine.working { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.demo-card .dc-engine.working i { animation: pulse .8s infinite; }
.demo-card .dc-engine.done { border-color: #c9f0e2; color: #0a7d5a; background: #ecfaf4; }
.demo-card .dc-engine.fail { opacity: .45; text-decoration: line-through; }

/* 检测结果 */
.dc-result { display: none; margin-top: 18px; border-top: 1px dashed var(--line); padding-top: 18px; }
.dc-result.on { display: block; animation: fadeUp .35s; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.dc-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 14px; }
.dc-metric { background: #fbfbfa; border: 1px solid var(--line2); border-radius: 12px; padding: 12px; text-align: center; }
.dc-metric .v { font-size: 22px; font-weight: 800; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.dc-metric .v small { font-size: 12px; font-weight: 600; color: var(--muted); }
.dc-metric .k { font-size: 11px; color: var(--muted); margin-top: 2px; }
.dc-metric.good .v { color: var(--good); }
.dc-metric.bad .v { color: var(--bad); }
.dc-engines-result { display: flex; flex-direction: column; gap: 8px; }
.dc-er {
  display: flex; align-items: center; gap: 10px;
  border: 1px solid var(--line2); border-radius: 11px; padding: 10px 12px; font-size: 12.5px;
}
.dc-er .dot { width: 8px; height: 8px; border-radius: 50%; flex: none; }
.dc-er .en { font-weight: 700; width: 74px; flex: none; }
.dc-er .st { color: var(--ink2); flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dc-er .pos { font-weight: 700; flex: none; font-variant-numeric: tabular-nums; }
.dc-er .pos.hit { color: var(--good); }
.dc-er .pos.miss { color: var(--muted); }
.dc-quote {
  margin-top: 10px; background: #fbfbfa; border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0; padding: 10px 14px; font-size: 12px; color: var(--ink2); line-height: 1.75;
}
.dc-quote mark { background: #fde9c8; color: inherit; padding: 0 2px; border-radius: 3px; font-weight: 600; }
.dc-rivals { margin-top: 10px; font-size: 12px; color: var(--muted); }
.dc-rivals b { color: var(--ink2); }
.dc-cta { margin-top: 14px; display: flex; gap: 10px; align-items: center; }
.dc-cta .tip { font-size: 11px; color: var(--muted); }
.dc-note { margin-top: 10px; font-size: 11px; color: var(--muted); line-height: 1.6; }
.dc-err { margin-top: 14px; font-size: 12.5px; color: var(--bad); background: #fdf2f2; border: 1px solid #fbd5d5; border-radius: 10px; padding: 10px 12px; display: none; }
.dc-err.on { display: block; }
.spinner {
  width: 15px; height: 15px; border: 2px solid rgba(255, 255, 255, .35);
  border-top-color: #fff; border-radius: 50%; animation: spin .7s linear infinite; display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ================= 通用 Section ================= */
section { padding: 84px 0; }
.sec-head { max-width: 720px; margin-bottom: 44px; }
.sec-no { font-family: var(--mono); font-size: 12px; font-weight: 700; color: var(--accent); letter-spacing: .12em; }
.sec-head h2 { font-size: clamp(26px, 3.2vw, 36px); font-weight: 800; letter-spacing: -.02em; line-height: 1.25; margin-top: 10px; }
.sec-head .lead { margin-top: 14px; font-size: 15.5px; color: var(--ink2); }
.sec-head .lead b { color: var(--ink); }

/* ================= 痛点四格 ================= */
.pain { background: var(--bg); }
.pain-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.pain-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r);
  padding: 24px 22px; transition: border-color .2s, transform .2s;
}
.pain-card:hover { border-color: #d6d5cf; transform: translateY(-2px); }
.pain-card .ic {
  width: 40px; height: 40px; border-radius: 11px; display: grid; place-items: center;
  background: #fdf2f2; color: var(--bad); margin-bottom: 16px;
}
.pain-card h3 { font-size: 16px; font-weight: 800; letter-spacing: -.01em; }
.pain-card p { margin-top: 8px; font-size: 13px; color: var(--ink2); line-height: 1.75; }

/* ================= 指标语言（深色） ================= */
.metrics { background: var(--dark); color: var(--dtext); }
.metrics .sec-no { color: var(--daccent); }
.metrics .sec-head h2 { color: var(--dtext); }
.metrics .sec-head .lead { color: var(--dtext2); }
.metrics .sec-head .lead b { color: var(--dtext); }
.metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.metric-card {
  background: var(--dark2); border: 1px solid var(--dline); border-radius: var(--r);
  padding: 24px 22px; position: relative; overflow: hidden;
}
.metric-card::after {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 2px;
  background: linear-gradient(90deg, var(--daccent), transparent);
}
.metric-card .idx { font-family: var(--mono); font-size: 11px; color: var(--dmuted); }
.metric-card h3 { font-size: 18px; font-weight: 800; margin-top: 8px; color: var(--dtext); }
.metric-card .def { margin-top: 8px; font-size: 13px; color: var(--dtext2); line-height: 1.75; }
.metric-card .viz { margin-top: 18px; height: 44px; display: flex; align-items: flex-end; gap: 5px; }
.metric-card .viz i { flex: 1; background: rgba(139, 143, 248, .28); border-radius: 3px 3px 0 0; }
.metric-card .viz i.on { background: var(--daccent); }
.metric-card .viz2 { margin-top: 18px; display: flex; gap: 4px; }
.metric-card .viz2 i { width: 10px; height: 10px; border-radius: 50%; background: rgba(139, 143, 248, .25); }
.metric-card .viz2 i.p { background: var(--good); }
.metric-card .viz2 i.n { background: var(--bad); }
.metric-card .viz3 { margin-top: 18px; font-family: var(--mono); font-size: 12px; color: var(--dtext2); line-height: 2; }
.metric-card .viz3 b { color: var(--daccent); font-size: 15px; }
.metrics .foot { margin-top: 26px; font-size: 13px; color: var(--dmuted); }
.metrics .foot b { color: var(--dtext2); }

/* ================= 使用演示 ================= */
.demo-flow { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: start; }
.chat-panel { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden; }
.chat-panel .cp-head {
  display: flex; align-items: center; gap: 8px; padding: 13px 18px;
  border-bottom: 1px solid var(--line2); font-size: 12.5px; font-weight: 700; color: var(--ink2);
  background: #fbfbfa;
}
.chat-panel .cp-head .dots { display: flex; gap: 5px; }
.chat-panel .cp-head .dots i { width: 8px; height: 8px; border-radius: 50%; }
.chat-panel .cp-body { padding: 20px 18px; }
.bubble-user {
  background: var(--accent); color: #fff; font-size: 13.5px; line-height: 1.7;
  padding: 11px 15px; border-radius: 14px 14px 4px 14px; max-width: 88%; margin-left: auto;
}
.bubble-ai {
  margin-top: 16px; background: #f6f6f4; border: 1px solid var(--line2);
  border-radius: 14px 14px 14px 4px; padding: 14px 16px; font-size: 13px; line-height: 1.9; color: var(--ink2);
}
.bubble-ai .ai-tag { display: flex; align-items: center; gap: 6px; font-size: 11.5px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.bubble-ai .ai-tag i { width: 7px; height: 7px; border-radius: 50%; }
.bubble-ai mark { background: #fde9c8; padding: 0 3px; border-radius: 3px; font-weight: 700; color: var(--ink); }
.analysis-panel { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 24px; }
.analysis-panel h3 { font-size: 16px; font-weight: 800; }
.analysis-panel .ap-sub { font-size: 12.5px; color: var(--muted); margin-top: 4px; }
.ap-rows { margin-top: 20px; display: flex; flex-direction: column; }
.ap-row { display: flex; justify-content: space-between; align-items: center; padding: 13px 0; border-bottom: 1px dashed var(--line); font-size: 13.5px; }
.ap-row:last-child { border-bottom: none; }
.ap-row .k { color: var(--ink2); }
.ap-row .v { font-weight: 800; font-variant-numeric: tabular-nums; }
.ap-row .v.good { color: var(--good); }
.ap-row .v.warn { color: var(--warn); }
.ap-tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 6px; }
.ap-tag { font-size: 11.5px; background: #f4f4f2; border: 1px solid var(--line); color: var(--ink2); border-radius: 99px; padding: 3px 11px; }
.ap-tag.src { font-family: var(--mono); }
.demo-cta { margin-top: 22px; display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.demo-cta .tip { font-size: 12px; color: var(--muted); }

/* ================= 功能：角色化 Tabs ================= */
.role-tabs { display: flex; gap: 8px; margin-bottom: 26px; flex-wrap: wrap; }
.role-tab {
  border: 1px solid var(--line); background: var(--paper); color: var(--ink2);
  font-family: var(--sans); font-size: 13.5px; font-weight: 600; cursor: pointer;
  padding: 9px 20px; border-radius: 99px; transition: all .15s;
}
.role-tab:hover { border-color: #cfcec8; }
.role-tab.on { background: var(--ink); color: #fff; border-color: var(--ink); }
.role-panel { display: none; }
.role-panel.on { display: block; animation: fadeUp .3s; }
.feat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.feat-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r);
  padding: 22px; display: flex; gap: 16px; align-items: flex-start;
}
.feat-card .ic {
  width: 38px; height: 38px; border-radius: 10px; flex: none;
  display: grid; place-items: center; background: var(--accent-soft); color: var(--accent);
}
.feat-card h4 { font-size: 14.5px; font-weight: 800; }
.feat-card p { margin-top: 5px; font-size: 12.5px; color: var(--ink2); line-height: 1.75; }

/* ================= 差异卖点 ================= */
.diff { background: var(--bg); }
.diff-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.diff-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 26px 24px; }
.diff-card .no { font-family: var(--mono); font-size: 12px; font-weight: 700; color: var(--accent); }
.diff-card h3 { font-size: 17px; font-weight: 800; margin-top: 10px; letter-spacing: -.01em; }
.diff-card p { margin-top: 10px; font-size: 13.5px; color: var(--ink2); line-height: 1.8; }
.diff-card .vs { margin-top: 14px; font-size: 12px; color: var(--muted); border-top: 1px dashed var(--line); padding-top: 12px; }
.diff-card .vs b { color: var(--good); }

/* ================= 定价 ================= */
.price-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; align-items: stretch; }
.price-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: 18px;
  padding: 26px 24px; display: flex; flex-direction: column; position: relative;
}
.price-card.pop { border: 2px solid var(--accent); box-shadow: 0 14px 44px rgba(79, 70, 229, .14); }
.price-card .pop-tag {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: #fff; font-size: 11px; font-weight: 700;
  padding: 3px 12px; border-radius: 99px; white-space: nowrap;
}
.price-card .p-name { font-size: 15px; font-weight: 800; }
.price-card .p-for { font-size: 12px; color: var(--muted); margin-top: 3px; min-height: 34px; }
.price-card .p-price { margin-top: 14px; display: flex; align-items: baseline; gap: 4px; }
.price-card .p-price .cur { font-size: 16px; font-weight: 700; }
.price-card .p-price .num { font-size: 38px; font-weight: 800; letter-spacing: -.03em; font-variant-numeric: tabular-nums; }
.price-card .p-price .per { font-size: 12.5px; color: var(--muted); }
.price-card .p-desc { font-size: 12px; color: var(--muted); margin-top: 4px; }
.price-card ul { list-style: none; margin: 20px 0; flex: 1; display: flex; flex-direction: column; gap: 9px; }
.price-card li { font-size: 12.5px; color: var(--ink2); padding-left: 20px; position: relative; line-height: 1.6; }
.price-card li::before {
  content: ""; position: absolute; left: 0; top: 4px; width: 13px; height: 13px;
  border-radius: 50%; background: var(--accent-soft);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%234f46e5' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6L9 17l-5-5'/%3E%3C/svg%3E");
  background-size: 9px; background-position: center; background-repeat: no-repeat;
}
.price-card li.dim { color: var(--muted); }
.price-card li.dim::before { background-color: #f1f1ef; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23a1a1a8' stroke-width='3.4' stroke-linecap='round'%3E%3Cpath d='M18 6L6 18M6 6l12 12'/%3E%3C/svg%3E"); }
.price-foot { margin-top: 26px; display: flex; gap: 22px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); }
.price-foot b { color: var(--ink2); }

/* ================= 证言 ================= */
.proof { background: var(--bg); }
.proof-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 16px; align-items: stretch; }
.proof-main { background: var(--paper); border: 1px solid var(--line); border-radius: var(--r); padding: 30px; }
.proof-main .pm-k { font-size: 12px; font-weight: 700; color: var(--accent); letter-spacing: .1em; }
.proof-main h3 { font-size: 21px; font-weight: 800; margin-top: 10px; letter-spacing: -.01em; line-height: 1.4; }
.proof-main p { margin-top: 14px; font-size: 13.5px; color: var(--ink2); line-height: 1.9; }
.proof-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 22px; }
.proof-stats .ps { background: #fbfbfa; border: 1px solid var(--line2); border-radius: 12px; padding: 14px; text-align: center; }
.proof-stats .ps .v { font-size: 21px; font-weight: 800; color: var(--accent); font-variant-numeric: tabular-nums; }
.proof-stats .ps .k { font-size: 11px; color: var(--muted); margin-top: 2px; }
.proof-side { background: var(--dark); color: var(--dtext); border-radius: var(--r); padding: 30px; display: flex; flex-direction: column; }
.proof-side .ps-k { font-size: 12px; font-weight: 700; color: var(--daccent); letter-spacing: .1em; }
.proof-side h3 { font-size: 19px; font-weight: 800; margin-top: 10px; line-height: 1.45; }
.proof-side p { margin-top: 12px; font-size: 13px; color: var(--dtext2); line-height: 1.9; flex: 1; }
.proof-side .btn { align-self: flex-start; margin-top: 18px; }

/* ================= Blog / 文档入口 ================= */
.entry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.entry-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r);
  padding: 28px; display: flex; flex-direction: column; min-height: 300px;
}
.entry-card .ec-k { font-size: 12px; font-weight: 700; color: var(--accent); letter-spacing: .1em; }
.entry-card h3 { font-size: 20px; font-weight: 800; margin-top: 10px; letter-spacing: -.01em; }
.entry-card > p { margin-top: 10px; font-size: 13px; color: var(--ink2); line-height: 1.8; }
.entry-list { margin-top: 18px; display: flex; flex-direction: column; flex: 1; }
.entry-list a {
  display: flex; justify-content: space-between; gap: 14px; align-items: baseline;
  text-decoration: none; padding: 12px 0; border-bottom: 1px dashed var(--line); font-size: 13px;
}
.entry-list a:last-child { border-bottom: none; }
.entry-list a .t { color: var(--ink); font-weight: 600; }
.entry-list a:hover .t { color: var(--accent); }
.entry-list a .d { font-size: 11.5px; color: var(--muted); flex: none; font-family: var(--mono); }
.entry-card .ec-go { margin-top: 18px; font-size: 13px; font-weight: 700; color: var(--accent); text-decoration: none; }
.entry-card .ec-go:hover { text-decoration: underline; }

/* ================= 合作（深色） ================= */
.partners { background: var(--dark); color: var(--dtext); }
.partners .sec-no { color: var(--daccent); }
.partners .sec-head h2 { color: var(--dtext); }
.partners .sec-head .lead { color: var(--dtext2); }
.partner-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.partner-card { background: var(--dark2); border: 1px solid var(--dline); border-radius: var(--r); padding: 26px 24px; }
.partner-card .no { font-family: var(--mono); font-size: 12px; color: var(--daccent); font-weight: 700; }
.partner-card h3 { font-size: 16.5px; font-weight: 800; margin-top: 10px; color: var(--dtext); }
.partner-card p { margin-top: 10px; font-size: 13px; color: var(--dtext2); line-height: 1.85; }
.partner-card ul { margin-top: 12px; list-style: none; }
.partner-card li { font-size: 12.5px; color: var(--dmuted); padding: 4px 0 4px 16px; position: relative; }
.partner-card li::before { content: "▸"; position: absolute; left: 0; color: var(--daccent); }

/* 四通道客服 */
.contact { margin-top: 20px; background: var(--dark2); border: 1px solid var(--dline); border-radius: var(--r); padding: 30px; display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.contact h3 { font-size: 18px; font-weight: 800; color: var(--dtext); }
.contact .c-sub { font-size: 13px; color: var(--dmuted); margin-top: 6px; }
.contact form { margin-top: 18px; display: flex; flex-direction: column; gap: 10px; }
.contact .row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.contact input, .contact textarea, .contact select {
  width: 100%; padding: 11px 13px; font-size: 13.5px; font-family: var(--sans);
  background: var(--dark3); border: 1px solid var(--dline); border-radius: 10px; color: var(--dtext);
  outline: none; transition: border-color .15s;
}
.contact input::placeholder, .contact textarea::placeholder { color: #5d5e68; }
.contact input:focus, .contact textarea:focus, .contact select:focus { border-color: var(--daccent); }
.contact textarea { resize: vertical; min-height: 74px; }
.contact .form-msg { font-size: 12.5px; display: none; margin-top: 4px; }
.contact .form-msg.ok { display: block; color: #6ee7b7; }
.contact .form-msg.err { display: block; color: #fca5a5; }
.channels { display: flex; flex-direction: column; gap: 10px; }
.channel {
  display: flex; align-items: center; gap: 14px; background: var(--dark3);
  border: 1px solid var(--dline); border-radius: 12px; padding: 14px 16px; text-decoration: none;
}
.channel .ic {
  width: 38px; height: 38px; border-radius: 10px; flex: none; display: grid; place-items: center;
  background: rgba(139, 143, 248, .14); color: var(--daccent);
}
.channel .t { font-size: 13.5px; font-weight: 700; color: var(--dtext); }
.channel .d { font-size: 12px; color: var(--dmuted); margin-top: 1px; }
.channel .go { margin-left: auto; font-size: 12px; color: var(--daccent); font-weight: 600; flex: none; }

/* ================= Footer ================= */
footer { background: var(--dark); border-top: 1px solid var(--dline); color: var(--dmuted); padding: 40px 0 46px; font-size: 12.5px; }
footer .wrap { display: flex; flex-direction: column; gap: 18px; }
footer .f-top { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; align-items: flex-start; }
footer .f-brand { display: flex; align-items: center; gap: 10px; color: var(--dtext); font-weight: 700; font-size: 14px; }
footer .f-links { display: flex; gap: 22px; flex-wrap: wrap; }
footer .f-links a { text-decoration: none; color: var(--dmuted); }
footer .f-links a:hover { color: var(--dtext2); }
footer .f-bottom { border-top: 1px solid var(--dline); padding-top: 18px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 11.5px; }

/* ================= 响应式 ================= */@media (max-width: 1020px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 44px; }
  .pain-grid, .metric-grid, .price-grid, .partner-grid, .diff-grid { grid-template-columns: 1fr 1fr; }
  .demo-flow, .proof-grid, .entry-grid, .contact { grid-template-columns: 1fr; }
  .nav .links { display: none; }
}
@media (max-width: 640px) {
  section { padding: 60px 0; }
  .pain-grid, .metric-grid, .price-grid, .partner-grid, .diff-grid, .feat-grid { grid-template-columns: 1fr; }
  .hero { padding: 118px 0 64px; }
  .dc-summary { grid-template-columns: 1fr 1fr; }
  .proof-stats { grid-template-columns: 1fr; }
}

/* ================= 博客 / 文档内容页 ================= */
.page-head { padding: 118px 0 40px; border-bottom: 1px solid var(--line); background: var(--bg); }
.page-head .ph-k { font-size: 12px; font-weight: 700; color: var(--accent); letter-spacing: .12em; }
.page-head h1 { font-size: clamp(28px, 3.6vw, 40px); font-weight: 800; letter-spacing: -.02em; line-height: 1.25; margin-top: 12px; max-width: 800px; }
.page-head .ph-sub { margin-top: 14px; font-size: 15px; color: var(--ink2); max-width: 720px; }
.page-head .ph-meta { margin-top: 18px; display: flex; gap: 16px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); font-family: var(--mono); }

.article-wrap { display: grid; grid-template-columns: 1fr 240px; gap: 44px; padding: 44px 0 20px; }
.prose { font-size: 15px; line-height: 1.95; color: var(--ink2); max-width: 760px; }
.prose h2 { font-size: 21px; font-weight: 800; color: var(--ink); margin: 40px 0 14px; letter-spacing: -.01em; scroll-margin-top: 90px; }
.prose h2::before { content: ""; display: block; width: 26px; height: 3px; background: var(--accent); border-radius: 2px; margin-bottom: 12px; }
.prose h3 { font-size: 16.5px; font-weight: 700; color: var(--ink); margin: 28px 0 10px; }
.prose p { margin: 14px 0; }
.prose ul, .prose ol { margin: 14px 0 14px 22px; display: flex; flex-direction: column; gap: 7px; }
.prose li::marker { color: var(--accent); }
.prose strong { color: var(--ink); font-weight: 700; }
.prose a { color: var(--accent); text-decoration: none; border-bottom: 1px solid rgba(79, 70, 229, .3); }
.prose a:hover { border-bottom-color: var(--accent); }
.prose blockquote {
  margin: 20px 0; padding: 14px 18px; background: var(--accent-soft);
  border-left: 3px solid var(--accent); border-radius: 0 10px 10px 0;
  font-size: 14px; color: #3730a3;
}
.prose code {
  font-family: var(--mono); font-size: 13px; background: #f1f1ef;
  border: 1px solid var(--line); border-radius: 5px; padding: 1px 6px; color: #b31d6f;
}
.prose pre {
  background: var(--dark); color: #e8e9ec; border-radius: 12px;
  padding: 16px 18px; overflow-x: auto; margin: 18px 0; font-size: 13px; line-height: 1.8;
}
.prose pre code { background: none; border: none; color: inherit; padding: 0; }
.prose hr { border: none; border-top: 1px dashed var(--line); margin: 30px 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 18px 0; font-size: 13.5px; }
.prose th { text-align: left; padding: 9px 12px; border-bottom: 2px solid var(--line); font-weight: 700; color: var(--ink); }
.prose td { padding: 9px 12px; border-bottom: 1px solid var(--line2); }

/* 侧边目录 */
.toc { position: sticky; top: 86px; align-self: start; }
.toc .toc-k { font-size: 11px; font-weight: 700; letter-spacing: .1em; color: var(--muted); margin-bottom: 10px; }
.toc a { display: block; font-size: 12.5px; color: var(--ink2); text-decoration: none; padding: 5px 0 5px 12px; border-left: 2px solid var(--line); line-height: 1.5; }
.toc a:hover { color: var(--accent); border-left-color: var(--accent); }

/* 文章底部：相关 + CTA */
.article-foot { margin: 36px 0 0; }
.af-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.af-tags .ap-tag { font-size: 11.5px; }
.cta-band {
  background: var(--dark); color: var(--dtext); border-radius: 18px;
  padding: 34px; margin: 40px 0 70px; display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
}
.cta-band h3 { font-size: 21px; font-weight: 800; letter-spacing: -.01em; }
.cta-band p { font-size: 13.5px; color: var(--dtext2); margin-top: 8px; max-width: 520px; }
.cta-band .btn { margin-left: auto; }

/* 列表页卡片 */
.list-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 40px 0 20px; }
.list-card {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r);
  padding: 24px; text-decoration: none; display: flex; flex-direction: column;
  transition: border-color .15s, transform .15s;
}
.list-card:hover { border-color: #cfcec8; transform: translateY(-2px); }
.list-card .lc-meta { display: flex; gap: 10px; align-items: center; font-size: 11.5px; color: var(--muted); font-family: var(--mono); }
.list-card .lc-cat { font-family: var(--sans); font-size: 11px; font-weight: 700; color: var(--accent); background: var(--accent-soft); border-radius: 99px; padding: 2px 9px; }
.list-card h3 { font-size: 16.5px; font-weight: 800; margin-top: 12px; letter-spacing: -.01em; line-height: 1.45; color: var(--ink); }
.list-card:hover h3 { color: var(--accent); }
.list-card p { margin-top: 10px; font-size: 13px; color: var(--ink2); line-height: 1.8; flex: 1; }
.list-card .lc-go { margin-top: 14px; font-size: 12.5px; font-weight: 700; color: var(--accent); }
.doc-group { padding: 34px 0 6px; }
.doc-group .dg-k { font-size: 12px; font-weight: 700; color: var(--accent); letter-spacing: .1em; margin-bottom: 14px; }

@media (max-width: 900px) {
  .article-wrap { grid-template-columns: 1fr; }
  .toc { display: none; }
  .list-grid { grid-template-columns: 1fr; }
}