/* =====================================================================
   华探 GEO 官网 — 设计系统 / Design System
   还原宣传册:深蓝(navy) + 暖米(cream)双底色、橙色高亮、衬线大标题
   全适配 / 移动优先 / 无障碍 / 利于收录(内容不依赖 JS)
   ===================================================================== */

/* ---------- 设计令牌 Design Tokens ---------- */
:root {
  /* 深色系(暗底版块) */
  --navy-950: #0a1222;
  --navy-900: #0b1426;
  --navy-850: #0e1a33;
  --navy-800: #111f3a;
  --navy-card: #14213f;
  --navy-card-2: #1a2a4d;

  /* 浅色系(亮底版块) */
  --cream-50: #f7f2e8;
  --cream-100: #f1ebdd;
  --cream-200: #e9e1cf;

  /* 文字 */
  --ink-900: #151d2e;             /* 米底主标题 */
  --ink-700: #2b3447;
  --ink-500: #586071;
  --on-dark: #ffffff;
  --on-dark-muted: #9aa6bd;
  --on-dark-faint: #8893aa;
  --on-light-muted: #565e6e;

  /* 品牌强调色 */
  --orange-700: #c9741b;
  --orange-600: #df8a2a;
  --orange-500: #e89a3c;
  --orange-400: #f0ad4e;
  --orange-100: #f8e3c4;
  --orange-ink: #9a5512;          /* 用于浅底/白底上的橙色文字,满足 WCAG AA */
  --blue-400: #7088d8;
  --blue-ink: #41549c;            /* 用于浅底/白底上的蓝色文字,满足 WCAG AA */
  --green-500: #3fae6b;
  --red-400: #e8736b;

  /* 边框 / 分隔 */
  --border-dark: rgba(255, 255, 255, 0.09);
  --border-dark-strong: rgba(255, 255, 255, 0.16);
  --border-light: rgba(20, 30, 60, 0.10);
  --border-light-strong: rgba(20, 30, 60, 0.16);

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 2px 8px rgba(15, 23, 42, .05);
  --shadow-md: 0 8px 30px rgba(15, 23, 42, .08);
  --shadow-lg: 0 24px 60px rgba(8, 14, 30, .18);
  --shadow-orange: 0 10px 30px rgba(217, 127, 34, .28);

  /* 字体 */
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --font-sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* 圆角 */
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-pill: 999px;

  /* 容器 */
  --container: 1180px;
  --gutter: clamp(20px, 5vw, 64px);
  --section-y: clamp(64px, 9vw, 120px);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-700);
  background: var(--cream-50);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, video { max-width: 100%; display: block; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4 { margin: 0; font-weight: 800; line-height: 1.2; }
p { margin: 0; }
:focus-visible { outline: 3px solid var(--orange-400); outline-offset: 3px; border-radius: 4px; }

/* ---------- 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.section { padding-block: var(--section-y); position: relative; }
.section--dark { background: var(--navy-900); color: var(--on-dark); }
.section--darker { background: var(--navy-950); color: var(--on-dark); }
.section--cream { background: var(--cream-50); color: var(--ink-700); }
.section--cream-2 { background: var(--cream-100); color: var(--ink-700); }

/* 版式标记:◆ 中文标签 + 英文大写 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 22px;
}
.eyebrow::before { content: "◆"; color: var(--orange-500); font-size: 11px; }
.eyebrow .en {
  color: var(--on-light-muted);
  font-weight: 600;
  letter-spacing: .32em;
  font-size: 11px;
  text-transform: uppercase;
}
.section--dark .eyebrow .en, .section--darker .eyebrow .en { color: var(--on-dark-faint); }

/* 标题:衬线大字 */
.display {
  font-family: var(--font-serif);
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--ink-900);
}
.section--dark .display, .section--darker .display { color: var(--on-dark); }
.display-1 { font-size: clamp(2.1rem, 6.2vw, 4.1rem); line-height: 1.18; }
.display-2 { font-size: clamp(1.7rem, 4.6vw, 3rem); line-height: 1.22; }
.display-3 { font-size: clamp(1.35rem, 3vw, 2rem); }
.lead {
  font-size: clamp(1rem, 1.6vw, 1.18rem);
  line-height: 1.8;
  color: var(--on-light-muted);
  max-width: 60ch;
}
.section--dark .lead, .section--darker .lead { color: var(--on-dark-muted); }

/* 橙色高亮 + 标记下划线 */
.hl { color: var(--orange-500); }
mark, .mark {
  background: linear-gradient(transparent 58%, rgba(232, 154, 60, .42) 58%);
  color: inherit;
  padding: 0 .12em;
  border-radius: 2px;
}
.section--dark mark, .section--dark .mark,
.section--darker mark, .section--darker .mark {
  background: linear-gradient(transparent 58%, rgba(232, 154, 60, .38) 58%);
  color: var(--on-dark);
}
.title-bar { width: 64px; height: 5px; border-radius: 3px; background: var(--orange-500); margin: 22px 0 28px; }

/* 装饰同心圆(英雄区右上) */
.rings { position: absolute; pointer-events: none; opacity: .5; }
.rings span {
  position: absolute; border: 1px solid var(--border-dark-strong); border-radius: 50%;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 26px; border-radius: var(--r-pill);
  font-weight: 700; font-size: 15px; line-height: 1;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--orange-500); color: #2a1602; box-shadow: var(--shadow-orange); }
.btn-primary:hover { background: var(--orange-400); transform: translateY(-2px); }
.btn-ghost { background: transparent; color: var(--on-dark); border: 1px solid var(--border-dark-strong); }
.btn-ghost:hover { background: rgba(255, 255, 255, .07); border-color: rgba(255, 255, 255, .3); }
.btn-dark { background: var(--ink-900); color: #fff; }
.btn-dark:hover { background: #0c1424; transform: translateY(-2px); }
.btn-lg { padding: 17px 34px; font-size: 16px; }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(11, 20, 38, .82);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-dark);
  transition: background .3s ease;
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: #fff; }
.brand__logo {
  width: 38px; height: 38px; border-radius: 11px; flex: none;
  background: linear-gradient(150deg, #2fb3c9, #2f6fd6);
  display: grid; place-items: center; color: #fff; font-weight: 900; font-size: 15px;
  font-family: var(--font-sans); letter-spacing: -.04em;
  box-shadow: 0 4px 14px rgba(47, 111, 214, .4);
}
.brand__name { font-weight: 800; font-size: 18px; line-height: 1.05; letter-spacing: .02em; }
.brand__name b { color: var(--orange-500); }
.brand__tag { display: block; font-size: 11px; color: var(--on-dark-faint); font-weight: 500; margin-top: 2px; }
.nav__links { display: flex; align-items: center; gap: 4px; }
.nav__links a {
  color: var(--on-dark-muted); font-size: 14.5px; font-weight: 500;
  padding: 9px 13px; border-radius: var(--r-pill); transition: color .15s, background .15s;
}
.nav__links a:hover { color: #fff; background: rgba(255, 255, 255, .06); }
.nav__cta { display: flex; align-items: center; gap: 10px; }
.nav__toggle { display: none; width: 42px; height: 42px; border-radius: 10px; color: #fff; }
.nav__toggle svg { margin: auto; }

/* 移动端抽屉 */
.nav__drawer { display: none; }

@media (max-width: 980px) {
  .nav__links, .nav__cta .btn { display: none; }
  .nav__toggle { display: grid; place-items: center; }
  .nav__drawer {
    display: block; position: fixed; inset: 68px 0 auto 0; z-index: 99;
    background: var(--navy-900); border-bottom: 1px solid var(--border-dark);
    padding: 14px var(--gutter) 26px;
    transform: translateY(-130%); visibility: hidden;
    transition: transform .32s cubic-bezier(.2,.8,.2,1), visibility .32s;
    box-shadow: var(--shadow-lg);
  }
  .nav__drawer.open { transform: translateY(0); visibility: visible; }
  .nav__drawer a {
    display: block; color: var(--on-dark-muted); font-size: 16px; font-weight: 500;
    padding: 14px 6px; border-bottom: 1px solid var(--border-dark);
  }
  .nav__drawer a:last-of-type { border-bottom: none; }
  .nav__drawer .btn { display: flex; margin-top: 16px; width: 100%; }
}

/* ---------- HERO ---------- */
.hero { position: relative; overflow: hidden; padding-block: clamp(56px, 8vw, 104px); }
.hero .rings { top: -120px; right: -160px; width: 620px; height: 620px; }
.hero__inner { position: relative; z-index: 2; max-width: 920px; }
.hero h1 { margin-bottom: 26px; }
.hero .lead { margin-bottom: 34px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 46px; }

/* AI 模拟对话卡 */
.ai-card {
  background: rgba(255, 255, 255, .035);
  border: 1px solid var(--border-dark);
  border-radius: var(--r-lg);
  padding: clamp(20px, 3vw, 30px);
  max-width: 760px;
  backdrop-filter: blur(4px);
}
.ai-card__head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.ai-card__who { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 14px; color: var(--on-dark-muted); }
.ai-badge {
  width: 30px; height: 30px; border-radius: 9px; flex: none;
  background: linear-gradient(150deg, #2fb3c9, #2f6fd6);
  display: grid; place-items: center; font-size: 11px; font-weight: 800; color: #fff;
}
.ai-card__tag { font-size: 11.5px; color: var(--on-dark-faint); background: rgba(255,255,255,.06); padding: 5px 11px; border-radius: var(--r-pill); white-space: nowrap; }
.ai-q { color: var(--on-dark-muted); font-size: 15px; margin-bottom: 12px; }
.ai-a { color: #d7deec; font-size: 15px; line-height: 1.85; }

.hero__strap {
  font-family: var(--font-serif); font-weight: 800;
  font-size: clamp(1.3rem, 3vw, 2rem); line-height: 1.4; color: #fff;
  margin-top: clamp(40px, 6vw, 64px);
}

/* 信息条(过去十年 → 今天) */
.shiftbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: clamp(16px, 4vw, 40px);
  border: 1px solid var(--border-dark); border-radius: var(--r-lg);
  padding: clamp(18px, 3vw, 26px) clamp(22px, 4vw, 34px); margin-top: 40px;
  background: rgba(255,255,255,.025);
}
.shiftbar__from, .shiftbar__to { text-align: center; }
.shiftbar small { display: block; font-size: 12px; color: var(--on-dark-faint); margin-bottom: 4px; }
.shiftbar b { font-size: clamp(1.05rem, 2vw, 1.3rem); font-weight: 800; }
.shiftbar__to b { color: var(--orange-500); }
.shiftbar__arrow { color: var(--orange-500); font-size: 22px; }
.shiftbar__txt { color: var(--on-dark-muted); border-left: 1px solid var(--border-dark); padding-left: clamp(16px,3vw,30px); flex: 1 1 280px; }
.shiftbar__txt b { color: #fff; }
@media (max-width: 620px){ .shiftbar__txt { border-left: none; padding-left: 0; flex-basis: 100%; } }

/* ---------- 通用网格卡片 ---------- */
.grid { display: grid; gap: clamp(16px, 2.4vw, 24px); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.card {
  border-radius: var(--r-lg); padding: clamp(22px, 2.6vw, 30px);
  position: relative; height: 100%;
}
.card--light { background: #fff; border: 1px solid var(--border-light); box-shadow: var(--shadow-sm); }
.card--dark { background: var(--navy-card); border: 1px solid var(--border-dark); }
.card h3 { font-size: 1.18rem; margin-bottom: 10px; }
.card--dark h3 { color: #fff; }
.card p { font-size: 14.5px; color: var(--on-light-muted); line-height: 1.75; }
.card--dark p { color: var(--on-dark-muted); }
.card__icon {
  width: 48px; height: 48px; border-radius: 13px; margin-bottom: 18px;
  display: grid; place-items: center;
  background: rgba(232,154,60,.12); color: var(--orange-500);
}
.card--dark .card__icon { background: rgba(255,255,255,.06); color: #cdd6ea; }
.card__icon svg { width: 24px; height: 24px; }
.card__tag {
  display: inline-block; margin-top: 16px; font-size: 12px; font-weight: 700;
  color: var(--orange-700); background: rgba(232,154,60,.13);
  padding: 6px 12px; border-radius: var(--r-pill);
}
.card--dark .card__tag { color: var(--orange-400); background: rgba(232,154,60,.14); }

/* 痛点卡(✗ 图标) */
.pain { display: flex; gap: 16px; align-items: flex-start; }
.pain__x {
  width: 30px; height: 30px; border-radius: 9px; flex: none; margin-top: 2px;
  display: grid; place-items: center; background: rgba(232,115,107,.12); color: var(--red-400);
  font-weight: 800;
}
.pain h3 { font-size: 1.08rem; margin-bottom: 6px; }
.section-foot {
  margin-top: clamp(40px, 6vw, 64px); text-align: center;
}
.section-foot__lead { font-family: var(--font-serif); font-size: clamp(1.2rem, 2.6vw, 1.75rem); font-weight: 800; color: var(--ink-900); }
.section-foot__lead .hl { color: var(--orange-ink); }
.callout {
  margin-top: 26px; background: var(--navy-900); color: #fff; border-radius: var(--r-lg);
  border-left: 4px solid var(--orange-500);
  padding: clamp(20px, 3vw, 28px) clamp(22px, 3.5vw, 34px); text-align: left;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.callout small { color: var(--orange-500); font-weight: 700; display: block; margin-bottom: 8px; letter-spacing: .04em; }
.callout p { color: var(--on-dark-muted); font-size: 15.5px; }
.callout__arrow { color: var(--orange-500); font-size: 28px; flex: none; }

/* 强调问题盒(深蓝) */
.qbox {
  background: var(--navy-900); color: #fff; border-radius: var(--r-xl);
  padding: clamp(30px, 5vw, 56px); position: relative; overflow: hidden; margin-top: 40px;
}
.qbox .rings { bottom: -200px; right: -120px; width: 460px; height: 460px; opacity: .35; }
.qbox small { color: var(--orange-500); font-weight: 700; letter-spacing: .06em; }
.qbox h2 { font-family: var(--font-serif); font-size: clamp(1.6rem, 4.5vw, 2.7rem); margin: 16px 0 18px; }
.qbox p { color: var(--on-dark-muted); font-size: clamp(.98rem, 1.6vw, 1.1rem); max-width: 70ch; position: relative; z-index: 2; }

/* ---------- Before / After 表 ---------- */
.ba {
  border: 1px solid var(--border-dark); border-radius: var(--r-lg); overflow: hidden;
  background: var(--navy-card);
}
.ba__row {
  display: grid; grid-template-columns: 1fr 56px 1.25fr; align-items: center;
  border-bottom: 1px solid var(--border-dark);
}
.ba__row:last-child { border-bottom: none; }
.ba__head { background: rgba(255,255,255,.03); font-weight: 700; color: #fff; }
.ba__head .ba__after { color: #fff; }
.ba__cell { padding: clamp(16px, 2.4vw, 22px) clamp(16px, 2.4vw, 26px); }
.ba__before { color: var(--on-dark-muted); font-size: 15px; }
.ba__arrow { color: var(--orange-500); text-align: center; font-size: 20px; }
.ba__after { color: #fff; font-weight: 600; font-size: 15px; line-height: 1.7; border-left: 1px solid var(--border-dark); }
@media (max-width: 720px) {
  .ba__row { grid-template-columns: 1fr; }
  .ba__head { display: none; }
  .ba__arrow { display: none; }
  .ba__before { padding-bottom: 4px; }
  .ba__after { border-left: none; padding-top: 4px; color: #fff; }
  .ba__row:not(.ba__head) .ba__before::after { content: "↓"; color: var(--orange-500); display: inline-block; margin-left: 8px; }
}
.miniband { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin-top: 30px; }
@media (max-width: 620px){ .miniband { grid-template-columns: 1fr; } }
.miniband__item {
  display: flex; align-items: flex-start; gap: 12px;
  background: rgba(255,255,255,.03); border: 1px solid var(--border-dark);
  border-radius: var(--r-md); padding: 18px 20px;
}
.dot { width: 9px; height: 9px; border-radius: 50%; margin-top: 7px; flex: none; }
.dot--orange { background: var(--orange-500); }
.dot--blue { background: var(--blue-400); }
.miniband b { color: #fff; font-size: 15px; display: block; }
.miniband span { color: var(--on-dark-muted); font-size: 13px; }

/* ---------- GEO 六步闭环 ---------- */
.steps { display: grid; grid-template-columns: repeat(3,1fr); gap: clamp(16px,2.4vw,24px); }
@media (max-width: 900px){ .steps { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 600px){ .steps { grid-template-columns: 1fr; } }
.step { background:#fff; border:1px solid var(--border-light); border-radius: var(--r-lg); padding: clamp(22px,2.6vw,30px); box-shadow: var(--shadow-sm); }
.step__no { font-family: var(--font-serif); font-size: 2rem; font-weight: 800; color: var(--orange-ink); line-height: 1; }
.step__icon { width: 40px; height: 40px; margin: 16px 0 14px; color: var(--blue-400); }
.step h3 { font-size: 1.12rem; margin-bottom: 8px; }
.step p { font-size: 14px; color: var(--on-light-muted); }

.flow {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 34px;
}
.flow__node {
  display: inline-flex; align-items: center; gap: 8px;
  background: #fff; border: 1px solid var(--border-light-strong); border-radius: var(--r-pill);
  padding: 11px 20px; font-weight: 700; font-size: 14px; color: var(--ink-900);
}
.flow__node--end { background: var(--navy-900); color: #fff; border-color: var(--navy-900); }
.flow__arrow { color: var(--orange-500); font-weight: 800; }
.loop-note {
  margin-top: 32px; background: #fff; border: 1px solid var(--border-light);
  border-left: 4px solid var(--blue-400); border-radius: var(--r-md);
  padding: 22px 26px; font-size: 14.5px; color: var(--ink-700);
}
.loop-note b { color: var(--ink-900); }

/* ---------- 数据条 ---------- */
.stats { display: grid; grid-template-columns: repeat(3,1fr); gap: clamp(20px,3vw,40px); margin-top: clamp(36px,5vw,56px); padding-top: clamp(30px,4vw,44px); border-top: 1px solid var(--border-dark); }
@media (max-width: 620px){ .stats { grid-template-columns: 1fr; gap: 26px; } }
.stat__num { font-family: var(--font-serif); font-weight: 800; font-size: clamp(2.4rem,5vw,3.4rem); line-height: 1; color: #fff; }
.stat__num .u { color: var(--orange-500); font-size: .55em; }
.stat__label { color: var(--on-dark-muted); margin-top: 12px; font-size: 14px; }
.stat__label b { color: #cdd6ea; font-weight: 600; }

/* ---------- 证据/报告 ---------- */
.proof-panel {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 0;
  background: #fff; border: 1px solid var(--border-light); border-radius: var(--r-lg);
  overflow: hidden; box-shadow: var(--shadow-md);
}
@media (max-width: 820px){ .proof-panel { grid-template-columns: 1fr; } }
.proof-chart { padding: clamp(22px,3vw,32px); border-right: 1px solid var(--border-light); }
@media (max-width: 820px){ .proof-chart { border-right: none; border-bottom: 1px solid var(--border-light); } }
.proof-chart h3, .proof-rank h3 { font-size: 14px; color: var(--ink-900); margin-bottom: 18px; font-weight: 700; }
.proof-chart svg { width: 100%; height: auto; }
.proof-chart .axis { display: flex; justify-content: space-between; font-size: 12px; color: var(--on-light-muted); margin-top: 6px; }
.proof-chart figcaption { font-size: 13px; color: var(--on-light-muted); margin-top: 14px; }
.proof-rank { padding: clamp(22px,3vw,32px); }
.proof-rank ul li {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0; border-bottom: 1px solid var(--border-light); font-size: 15px;
}
.proof-rank ul li:last-child { border-bottom: none; }
.proof-rank .model { font-weight: 700; color: var(--ink-900); }
.proof-rank .rk { font-weight: 800; color: var(--orange-ink); }
.proof-rank .rk--cited { color: var(--blue-ink); }

.proof-list { margin-top: 34px; display: grid; grid-template-columns: 1fr 1fr; gap: 22px 40px; }
@media (max-width: 720px){ .proof-list { grid-template-columns: 1fr; } }
.proof-list__item { display: flex; gap: 14px; }
.proof-list__ic { width: 34px; height: 34px; flex: none; border-radius: 9px; background: rgba(112,136,216,.12); color: var(--blue-400); display: grid; place-items: center; }
.proof-list__ic svg { width: 18px; height: 18px; }
.proof-list__item b { color: var(--ink-900); display: block; margin-bottom: 3px; }
.proof-list__item span { font-size: 14px; color: var(--on-light-muted); }
.bigquote {
  margin-top: clamp(40px,6vw,60px); background: var(--navy-900); color: #fff;
  border-radius: var(--r-lg); padding: clamp(30px,5vw,46px); text-align: center;
  font-family: var(--font-serif); font-weight: 800; font-size: clamp(1.3rem,3vw,2rem); line-height: 1.45;
}

/* ---------- 行业标签 ---------- */
.tags { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.tag {
  background: #fff; border: 1px solid var(--border-light-strong); border-radius: var(--r-pill);
  padding: 11px 20px; font-size: 14.5px; font-weight: 600; color: var(--ink-700);
  transition: transform .12s, box-shadow .15s;
}
.tag:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.tag--accent { background: var(--ink-900); color: #fff; border-color: var(--ink-900); }

/* ✓ 卡片(避坑) */
.check h3::before {
  content: "✓"; display: inline-grid; place-items: center;
  width: 26px; height: 26px; margin-right: 10px; border-radius: 8px;
  background: rgba(63,174,107,.14); color: var(--green-500); font-size: 14px; vertical-align: -6px;
}

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 14px; max-width: 920px; }
.faq details {
  background: #fff; border: 1px solid var(--border-light); border-radius: var(--r-md);
  padding: 4px clamp(18px,2.5vw,26px); box-shadow: var(--shadow-sm);
}
.faq summary {
  list-style: none; cursor: pointer; display: flex; gap: 12px; align-items: flex-start;
  padding: 18px 0; font-weight: 700; color: var(--ink-900); font-size: 1.02rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "Q"; color: var(--orange-500); font-family: var(--font-serif); font-weight: 800; font-size: 1.2rem; line-height: 1.1; flex: none; }
.faq summary::after { content: "+"; margin-left: auto; color: var(--on-light-muted); font-size: 1.4rem; line-height: 1; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq__a { padding: 0 0 20px 30px; color: var(--on-light-muted); line-height: 1.8; font-size: 15px; }

/* ---------- 价格 ---------- */
.models-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 8px 0 40px; }
.model-chip {
  display: inline-flex; align-items: center; gap: 9px;
  background: rgba(255,255,255,.04); border: 1px solid var(--border-dark); border-radius: var(--r-pill);
  padding: 10px 18px; font-weight: 700; font-size: 14px; color: #fff;
}
.model-chip .ic { width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; font-size: 12px; font-weight: 800; color: #fff; flex: none; }

.feat-row { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; margin-bottom: 44px; }
@media (max-width: 860px){ .feat-row { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 480px){ .feat-row { grid-template-columns: 1fr; } }
.feat {
  display: flex; gap: 12px; align-items: center;
  background: rgba(255,255,255,.03); border: 1px solid var(--border-dark);
  border-radius: var(--r-md); padding: 16px 18px;
}
.feat__no { width: 28px; height: 28px; border-radius: 50%; background: var(--orange-500); color: #2a1602; font-weight: 800; display: grid; place-items: center; flex: none; font-size: 13px; }
.feat b { color: #fff; font-size: 14px; display: block; }
.feat span { color: var(--on-dark-muted); font-size: 12.5px; }

.plans { display: grid; grid-template-columns: repeat(3,1fr); gap: clamp(16px,2.4vw,24px); align-items: stretch; }
@media (max-width: 900px){ .plans { grid-template-columns: 1fr; max-width: 460px; margin-inline: auto; } }
.plan {
  background: var(--navy-card); border: 1px solid var(--border-dark); border-radius: var(--r-lg);
  padding: clamp(26px,3vw,34px); position: relative; display: flex; flex-direction: column;
}
.plan--featured { border-color: var(--orange-500); box-shadow: 0 0 0 1px var(--orange-500), var(--shadow-lg); }
.plan__badge {
  position: absolute; top: -13px; right: 26px; background: var(--orange-500); color: #2a1602;
  font-weight: 800; font-size: 12px; padding: 6px 16px; border-radius: var(--r-pill);
}
.plan__name { color: var(--orange-400); font-weight: 800; font-size: 1.05rem; margin-bottom: 14px; }
.plan__price { display: flex; align-items: baseline; gap: 4px; color: #fff; }
.plan__price .cur { font-size: 1.4rem; font-weight: 700; }
.plan__price .amt { font-family: var(--font-serif); font-size: clamp(2.4rem,4vw,3rem); font-weight: 800; line-height: 1; }
.plan__price .per { color: var(--on-dark-muted); font-size: 14px; }
.plan__list { margin: 24px 0 26px; border-top: 1px solid var(--border-dark); }
.plan__list li { display: flex; align-items: center; justify-content: space-between; padding: 13px 0; border-bottom: 1px solid var(--border-dark); font-size: 14px; color: var(--on-dark-muted); }
.plan__list li b { color: #fff; font-weight: 700; }
.plan .btn { margin-top: auto; width: 100%; }
.plan--featured .plan__list li b { color: var(--orange-400); }

.allinc {
  margin-top: 30px; background: var(--navy-950); border: 1px solid var(--border-dark);
  border-radius: var(--r-lg); padding: clamp(20px,3vw,26px) clamp(22px,3.5vw,30px);
  display: flex; gap: 18px; align-items: flex-start; flex-wrap: wrap;
}
.allinc__tag { color: var(--orange-500); font-weight: 800; font-size: 14px; flex: none; line-height: 1.6; }
.allinc p { color: var(--on-dark-muted); font-size: 14.5px; line-height: 1.8; flex: 1 1 320px; }
.allinc p b { color: #fff; }
.pricing-foot { text-align: center; margin-top: clamp(40px,6vw,56px); font-family: var(--font-serif); font-weight: 800; font-size: clamp(1.2rem,2.6vw,1.7rem); line-height: 1.5; color: var(--ink-900); }
.section--dark .pricing-foot { color: #fff; }
.pricing-foot .hl { color: var(--orange-500); }

/* ---------- 为什么是现在 / 3步 ---------- */
.diagbox {
  background: rgba(255,255,255,.03); border: 1px solid var(--border-dark-strong); border-radius: var(--r-lg);
  padding: clamp(26px,4vw,40px); margin: 36px 0 8px;
}
.diagbox small { color: var(--orange-500); font-weight: 700; }
.diagbox h3 { font-family: var(--font-serif); color: #fff; font-size: clamp(1.4rem,3vw,2rem); margin: 12px 0 14px; }
.diagbox p { color: var(--on-dark-muted); max-width: 72ch; }
.steps3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; margin-top: 34px; }
@media (max-width: 760px){ .steps3 { grid-template-columns: 1fr; } }
.step3 { background: var(--navy-card); border: 1px solid var(--border-dark); border-radius: var(--r-lg); padding: 26px; }
.step3__no { width: 36px; height: 36px; border-radius: 10px; background: var(--orange-500); color: #2a1602; font-weight: 800; display: grid; place-items: center; margin-bottom: 16px; }
.step3 h4 { color: #fff; font-size: 1.05rem; margin-bottom: 8px; }
.step3 p { color: var(--on-dark-muted); font-size: 14px; }

/* ---------- 联系 / 资质 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(16px,2.4vw,24px); }
@media (max-width: 760px){ .contact-grid { grid-template-columns: 1fr; } }
.qr-card {
  background: var(--navy-card); border: 1px solid var(--border-dark); border-radius: var(--r-lg);
  padding: clamp(22px,3vw,30px); display: flex; gap: 20px; align-items: center;
}
.qr {
  width: 120px; height: 120px; flex: none; border-radius: var(--r-md); background: #fff;
  display: grid; place-items: center; padding: 8px; overflow: hidden;
}
.qr img { width: 100%; height: 100%; object-fit: contain; }
.qr-card h3 { color: #fff; display: flex; align-items: center; gap: 8px; font-size: 1.05rem; margin-bottom: 8px; }
.qr-card p { color: var(--on-dark-muted); font-size: 13.5px; line-height: 1.7; }
.qr-card p b { color: #cdd6ea; }
.platform-ic { width: 22px; height: 22px; border-radius: 6px; display: grid; place-items: center; }

.cred {
  margin-top: clamp(20px,3vw,24px); background: var(--navy-card); border: 1px solid var(--border-dark);
  border-radius: var(--r-lg); padding: clamp(22px,3vw,30px);
  display: grid; grid-template-columns: 220px 1fr; gap: clamp(20px,3vw,36px); align-items: start;
}
@media (max-width: 680px){ .cred { grid-template-columns: 1fr; } }
.cred__lic { border-radius: var(--r-md); background: rgba(255,255,255,.04); border: 1px solid var(--border-dark); padding: 14px; }
.cred__lic .placeholder { aspect-ratio: 4/3; border: 1px dashed var(--border-dark-strong); border-radius: 8px; display: grid; place-items: center; color: var(--on-dark-faint); font-size: 12px; text-align: center; padding: 10px; }
.cred dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: 12px 18px; }
.cred dt { color: var(--on-dark-faint); font-size: 13.5px; white-space: nowrap; }
.cred dd { margin: 0; color: #fff; font-size: 14px; font-weight: 600; }

/* ---------- 底部 CTA 横幅 ---------- */
.cta-banner {
  background: var(--navy-card); border: 1px solid var(--border-dark); border-radius: var(--r-lg);
  padding: clamp(22px,3vw,30px) clamp(24px,4vw,38px); margin-top: clamp(36px,5vw,52px);
  display: flex; align-items: center; gap: 18px; justify-content: space-between; flex-wrap: wrap;
}
.cta-banner__l { display: flex; align-items: center; gap: 16px; }
.cta-banner h3 { color: #fff; font-size: 1.1rem; }
.cta-banner p { color: var(--on-dark-muted); font-size: 13.5px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--navy-950); color: var(--on-dark-muted); padding-block: clamp(44px,6vw,64px); border-top: 1px solid var(--border-dark); }
.footer__top { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 36px; padding-bottom: 36px; border-bottom: 1px solid var(--border-dark); }
@media (max-width: 760px){ .footer__top { grid-template-columns: 1fr; gap: 28px; } .footer__top a { min-height: 40px; display: flex; align-items: center; } }
.footer__top h3 { color: #fff; font-size: 14px; margin-bottom: 16px; font-weight: 700; }
.footer__nav { display: block; }
.footer__top a { display: block; padding: 6px 0; font-size: 14px; color: var(--on-dark-muted); transition: color .15s; }
.footer__top a:hover { color: #fff; }
.footer__about p { font-size: 13.5px; line-height: 1.8; max-width: 38ch; margin-top: 14px; }
.footer__bottom { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 26px; font-size: 13px; color: var(--on-dark-faint); }
.footer__bottom a:hover { color: #fff; }

/* 页脚品牌行(还原宣传册 "华探 GEO ... 01 — 11") */
.brand--footer .brand__logo { width: 32px; height: 32px; font-size: 13px; }

/* ---------- 滚动进入动画 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s cubic-bezier(.2,.7,.2,1), transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-d="1"] { transition-delay: .08s; }
.reveal[data-d="2"] { transition-delay: .16s; }
.reveal[data-d="3"] { transition-delay: .24s; }
.reveal[data-d="4"] { transition-delay: .32s; }

/* ---------- 回到顶部 ---------- */
.totop {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%; background: var(--orange-500); color: #2a1602;
  display: grid; place-items: center; box-shadow: var(--shadow-orange);
  opacity: 0; pointer-events: none; transform: translateY(10px); transition: opacity .25s, transform .25s;
}
.totop.show { opacity: 1; pointer-events: auto; transform: none; }

/* ---------- 跳过链接(无障碍) ---------- */
.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 200; background: #fff; color: var(--ink-900);
  padding: 10px 16px; border-radius: 8px; font-weight: 700; transition: top .2s;
}
.skip-link:focus { top: 12px; }

/* ---------- 工具 ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.maxw { max-width: 760px; }
.maxw-c { max-width: 760px; margin-inline: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* =====================================================================
   多页扩展组件(行业落地页 / 学堂文章 / 中心页)— 复用既有令牌
   ===================================================================== */

/* ---------- 面包屑 ---------- */
.breadcrumb { background: var(--cream-100); border-bottom: 1px solid var(--border-light); }
.breadcrumb .container { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding-block: 13px; font-size: 13.5px; color: var(--on-light-muted); }
.breadcrumb a { color: var(--blue-ink); font-weight: 600; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span[aria-current] { color: var(--ink-700); font-weight: 600; }
.breadcrumb__sep { color: var(--on-light-muted); opacity: .6; }

/* ---------- 底部 CTA 横幅:多页用 h2 标题 ---------- */
.cta-banner__h { color: #fff; font-size: clamp(1.05rem,2.2vw,1.3rem); font-family: var(--font-serif); font-weight: 800; line-height: 1.35; }

/* ---------- 行业页:客户正这样问 AI ---------- */
.ask { display: flex; gap: 14px; align-items: flex-start; }
.ask__ic {
  flex: none; width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--orange-500), #f0b15e); color: #2a1602;
  font-weight: 800; font-size: 12px; letter-spacing: .5px;
}
.ask__q { margin: 0; font-size: 1.02rem; font-weight: 600; color: var(--ink-900); line-height: 1.6; }

/* ---------- 中心页:卡片网格(行业 / 文章) ---------- */
.hub-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 900px){ .hub-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px){ .hub-grid { grid-template-columns: 1fr; } }
.hub-card {
  display: flex; flex-direction: column; gap: 10px;
  background: #fff; border: 1px solid var(--border-light); border-radius: var(--r-lg);
  padding: clamp(20px,2.4vw,26px); box-shadow: var(--shadow-sm);
  transition: transform .14s, box-shadow .18s, border-color .18s; min-height: 100%;
}
.hub-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--border-light-strong); }
.hub-card__cat {
  align-self: flex-start; font-size: 11.5px; font-weight: 700; color: var(--orange-ink);
  background: rgba(232,154,60,.12); padding: 4px 11px; border-radius: var(--r-pill);
}
.hub-card__title { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; font-size: 1.18rem; font-weight: 800; color: var(--ink-900); line-height: 1.35; }
.hub-card__arrow { color: var(--orange-500); font-weight: 700; flex: none; transition: transform .16s; }
.hub-card:hover .hub-card__arrow { transform: translateX(4px); }
.hub-card__sum { color: var(--on-light-muted); font-size: 14px; line-height: 1.7; flex: 1; }
.hub-card__date { font-size: 12.5px; color: var(--on-light-muted); opacity: .8; }

/* ---------- 文章正文 ---------- */
.article__head { max-width: 760px; }
.article__meta { color: var(--on-light-muted); font-size: 13.5px; margin-top: 14px; }
.article__lead { font-size: clamp(1.05rem,2.2vw,1.22rem); line-height: 1.8; color: var(--ink-700); margin-top: 18px; font-weight: 500; }
.article__lead strong, .article__lead b { color: var(--ink-900); }

.prose { max-width: 760px; margin-top: 40px; color: var(--ink-700); }
.prose h2 { font-family: var(--font-serif); font-size: clamp(1.3rem,3vw,1.7rem); font-weight: 800; color: var(--ink-900); margin: 46px 0 16px; line-height: 1.35; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 1.12rem; font-weight: 800; color: var(--ink-900); margin: 28px 0 12px; }
.prose p { font-size: 15.5px; line-height: 1.9; margin: 0 0 18px; }
.prose a { color: var(--blue-ink); font-weight: 600; }
.prose a:hover { text-decoration: underline; }
.prose b, .prose strong { color: var(--ink-900); font-weight: 700; }
.prose mark { background: linear-gradient(transparent 58%, rgba(232,154,60,.32) 0); color: inherit; padding: 0 2px; }
.prose ul, .prose ol { margin: 0 0 20px; padding-left: 1.3em; display: grid; gap: 9px; }
.prose li { font-size: 15.5px; line-height: 1.8; }
.prose blockquote {
  margin: 24px 0; padding: 18px 24px; background: var(--cream-100);
  border-left: 4px solid var(--orange-500); border-radius: 0 var(--r-md) var(--r-md) 0;
  font-family: var(--font-serif); font-size: 1.12rem; font-weight: 700; color: var(--ink-900); line-height: 1.6;
}
.prose table { width: 100%; border-collapse: collapse; margin: 22px 0; font-size: 14.5px; display: block; overflow-x: auto; }
.prose thead { background: var(--cream-100); }
.prose th { text-align: left; padding: 12px 14px; font-weight: 800; color: var(--ink-900); border-bottom: 2px solid var(--border-light-strong); white-space: nowrap; }
.prose td { padding: 12px 14px; border-bottom: 1px solid var(--border-light); color: var(--ink-700); vertical-align: top; }
.prose tbody tr:last-child td { border-bottom: 0; }
.prose .faq { margin-top: 18px; max-width: none; }

/* ---------- 相关阅读 ---------- */
.related { max-width: 760px; margin-top: 52px; padding-top: 30px; border-top: 1px solid var(--border-light-strong); }
.related__h { font-size: 1.15rem; font-weight: 800; color: var(--ink-900); margin-bottom: 18px; }
.related__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 720px){ .related__grid { grid-template-columns: 1fr; } }
.related__item {
  display: flex; flex-direction: column; gap: 7px; background: #fff;
  border: 1px solid var(--border-light); border-radius: var(--r-md); padding: 16px 18px;
  box-shadow: var(--shadow-sm); transition: transform .14s, box-shadow .16s;
}
.related__item:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.related__cat { font-size: 11px; font-weight: 700; color: var(--orange-ink); }
.related__t { font-size: 14.5px; font-weight: 700; color: var(--ink-900); line-height: 1.5; }