/* ==========================================================================
   明耕对外官网 · 设计系统
   配色宪法真源：ppt/minggeng_brochure/DESIGN.md（科技蓝 × 农业绿）
   纪律：蓝 ≈55% / 绿 ≈30% / 暖金 ≤15%（仅价格与 KPI）；禁第三种高饱和色
   ========================================================================== */

:root {
  /* 主色 / 辅助 / 强调（照抄 DESIGN.md） */
  --blue: #2563EB;
  --blue-l: #3B82F6;
  --green: #16A34A;
  --green-l: #22C55E;
  --amber: #F59E0B;

  /* 深底 */
  --navy: #0B1F3A;
  --navy-end: #13325C;

  /* 中性 / 表面 */
  --bg: #F8FAFC;
  --card: #FFFFFF;
  --line: #E2E8F0;
  --blue-50: #EFF6FF;
  --blue-100: #DBEAFE;
  --green-50: #F0FDF4;
  --green-100: #DCFCE7;
  --amber-50: #FFFBEB;

  /* 文本 */
  --t1: #0F172A;
  --t2: #475569;
  --t3: #94A3B8;
  --dark-t1: #F8FAFC;
  --dark-t2: #CBD5E1;

  /* 语义（仅数据/图表用，不做装饰） */
  --warn: #DC2626;

  /* 布局 */
  --container: 1200px;
  --content: 1140px;
  --r-card: 16px;
  --r-btn: 10px;
  --r-pill: 999px;
  --sh: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 23, 42, .06);
  --sh-lg: 0 2px 4px rgba(15, 23, 42, .06), 0 18px 44px rgba(15, 23, 42, .10);

  --font: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-num: "Inter", var(--font);
}

/* ---------------------------------------------------------------- 基础 --- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--t1);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
img { height: auto; }

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3, h4 { margin: 0; line-height: 1.2; font-weight: 700; letter-spacing: -.01em; }

p { margin: 0; }

ul { margin: 0; padding: 0; list-style: none; }

:focus-visible { outline: 3px solid var(--blue-l); outline-offset: 2px; border-radius: 4px; }

/* ------------------------------------------------------------ 排版阶梯 --- */
.h-hero {
  font-size: clamp(32px, 4.6vw, 56px); font-weight: 800; line-height: 1.14;
  /* 主标语在窄栏里会自动折行，普通折行会把中文词拆开（实测「园区数/字化系统」）。
     balance 让两行长度接近、断在语义边界；不支持的浏览器退回普通折行，无副作用。 */
  text-wrap: balance;
}
.h1 { font-size: clamp(26px, 3.2vw, 40px); font-weight: 700; }
.h2 { font-size: clamp(21px, 2.2vw, 28px); font-weight: 700; }
.h3 { font-size: clamp(17px, 1.5vw, 20px); font-weight: 600; }
.lead { font-size: clamp(16px, 1.35vw, 19px); color: var(--t2); line-height: 1.75; }
.body { font-size: 16px; color: var(--t2); }
.caption { font-size: 13px; color: var(--t3); line-height: 1.6; }
.num { font-family: var(--font-num); font-variant-numeric: tabular-nums; }

/* --------------------------------------------------------------- 布局 --- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 0; }
.section--tight { padding: 64px 0; }
.section--dark { background: var(--navy); color: var(--dark-t1); }
.section--white { background: var(--card); }

.section-head { max-width: 760px; margin-bottom: 44px; }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head .h1, .section-head .h2 { margin-bottom: 14px; }
.section--dark .lead, .section--dark .body { color: var(--dark-t2); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: .04em;
  color: var(--blue); background: var(--blue-50);
  border-radius: var(--r-pill); padding: 6px 14px; margin-bottom: 18px;
}
.eyebrow--green { color: var(--green); background: var(--green-50); }
.eyebrow--dark { color: var(--blue-100); background: rgba(59, 130, 246, .16); }

.rule { width: 44px; height: 3px; background: var(--blue); border-radius: 2px; margin: 20px 0; }
.rule--green { background: var(--green); }

/* --------------------------------------------------------------- 按钮 --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: inherit; font-size: 16px; font-weight: 600; line-height: 1;
  padding: 15px 26px; border-radius: var(--r-btn);
  border: 1px solid transparent; cursor: pointer;
  transition: transform .12s ease, box-shadow .16s ease, background-color .16s ease;
  text-decoration: none; white-space: nowrap;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary { background: var(--blue); color: #fff; box-shadow: 0 6px 16px rgba(37, 99, 235, .28); }
.btn--primary:hover { background: #1D4ED8; }

.btn--green { background: var(--green); color: #fff; box-shadow: 0 6px 16px rgba(22, 163, 74, .26); }
.btn--green:hover { background: #15803D; }

.btn--ghost { background: transparent; color: var(--t1); border-color: var(--line); }
.btn--ghost:hover { background: var(--card); border-color: #CBD5E1; }

.btn--onDark { background: rgba(255, 255, 255, .10); color: #fff; border-color: rgba(255, 255, 255, .26); backdrop-filter: blur(6px); }
.btn--onDark:hover { background: rgba(255, 255, 255, .18); }

.btn--sm { font-size: 14px; padding: 11px 18px; }
.btn--block { width: 100%; }

.btn-row { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }

/* --------------------------------------------------------------- 导航 --- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.nav.is-stuck { border-bottom-color: var(--line); box-shadow: 0 4px 18px rgba(15, 23, 42, .05); }
.nav__in {
  max-width: var(--container); margin: 0 auto; padding: 0 24px;
  height: 68px; display: flex; align-items: center; gap: 32px;
}

.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: var(--t1); letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.brand__mark {
  width: 34px; height: 34px; border-radius: 9px; flex: none;
  background: linear-gradient(135deg, var(--blue) 0%, var(--green) 100%);
  display: grid; place-items: center; color: #fff;
}
.brand__mark svg { width: 20px; height: 20px; }
.brand small { display: block; font-size: 11px; font-weight: 500; color: var(--t3); letter-spacing: .06em; margin-top: -2px; }

.nav__links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav__links a {
  font-size: 15px; font-weight: 500; color: var(--t1);
  padding: 9px 14px; border-radius: 8px; transition: background-color .15s ease, color .15s ease;
}
.nav__links a:hover { background: var(--blue-50); color: var(--blue); text-decoration: none; }
.nav__links a.is-active { color: var(--blue); font-weight: 600; }

.nav__cta { margin-left: 16px; }

.nav__burger {
  display: none; margin-left: auto;
  width: 42px; height: 42px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); cursor: pointer;
  align-items: center; justify-content: center;
}
.nav__burger span { display: block; width: 18px; height: 2px; background: var(--t1); border-radius: 2px; position: relative; }
.nav__burger span::before, .nav__burger span::after {
  content: ""; position: absolute; left: 0; width: 18px; height: 2px; background: var(--t1); border-radius: 2px;
}
.nav__burger span::before { top: -6px; }
.nav__burger span::after { top: 6px; }

.nav__drawer {
  display: none; border-top: 1px solid var(--line); background: var(--card);
  padding: 12px 24px 20px;
}
.nav__drawer.is-open { display: block; }
.nav__drawer a { display: block; padding: 13px 4px; font-size: 16px; color: var(--t1); border-bottom: 1px solid var(--line); }
.nav__drawer a:last-of-type { border-bottom: 0; }
.nav__drawer .btn { margin-top: 14px; }

/* ---------------------------------------------------------------- Hero --- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-end) 62%, #17406F 100%);
  color: var(--dark-t1);
  padding: 84px 0 76px;
}
/* 自绘光晕：不使用任何图片素材，规避许可闸门 */
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(760px 420px at 12% 8%, rgba(37, 99, 235, .38), transparent 62%),
    radial-gradient(680px 400px at 88% 78%, rgba(22, 163, 74, .26), transparent 64%),
    radial-gradient(520px 320px at 62% 4%, rgba(59, 130, 246, .20), transparent 60%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 78%);
}
.hero__in { position: relative; z-index: 1; display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.hero .h-hero { color: #fff; margin-bottom: 20px; }
.hero .lead { color: var(--dark-t2); max-width: 34em; }
.hero__note { margin-top: 22px; font-size: 14px; color: rgba(203, 213, 225, .82); }
.hero .btn-row { margin-top: 30px; }

/* 首屏右侧：自绘「闭环」示意图（概念类 → 自绘信息卡，合规） */
.loopcard {
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 20px; padding: 26px;
  backdrop-filter: blur(10px);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .28);
}
.loopcard__title { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 4px; }
.loopcard__sub { font-size: 13px; color: rgba(203, 213, 225, .8); margin-bottom: 20px; }
.loop { display: flex; flex-direction: column; gap: 0; }
.loop__step { display: flex; gap: 14px; align-items: flex-start; }
.loop__rail { display: flex; flex-direction: column; align-items: center; flex: none; }
.loop__dot {
  width: 38px; height: 38px; border-radius: 11px; flex: none;
  display: grid; place-items: center;
  background: rgba(255, 255, 255, .12); border: 1px solid rgba(255, 255, 255, .2);
}
.loop__dot svg { width: 19px; height: 19px; }
.loop__step:nth-child(odd) .loop__dot { background: rgba(37, 99, 235, .34); border-color: rgba(59, 130, 246, .5); }
.loop__step:nth-child(even) .loop__dot { background: rgba(22, 163, 74, .30); border-color: rgba(34, 197, 94, .46); }
.loop__line { width: 2px; flex: 1; min-height: 22px; background: rgba(255, 255, 255, .16); margin: 2px 0; }
.loop__step:last-child .loop__line { display: none; }
.loop__body { padding-bottom: 18px; }
.loop__step:last-child .loop__body { padding-bottom: 0; }
.loop__name { font-size: 15px; font-weight: 600; color: #fff; }
.loop__desc { font-size: 13px; color: rgba(203, 213, 225, .82); line-height: 1.6; }

/* 首屏数据条 */
.stats {
  margin-top: 52px; padding-top: 28px;
  border-top: 1px solid rgba(255, 255, 255, .14);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.stat__v { font-family: var(--font-num); font-size: 30px; font-weight: 800; color: #fff; line-height: 1.1; }
.stat__v small { font-size: 15px; font-weight: 600; margin-left: 3px; }
.stat__k { font-size: 13px; color: rgba(203, 213, 225, .8); margin-top: 6px; }

/* --------------------------------------------------------------- 卡片 --- */
.grid { display: grid; gap: 22px; }
/* 栅格子元素默认 min-width:auto，宽表会把轨道撑破（实测 390px 下溢出到 580px）。
   归零后 .tbl-wrap 的 overflow-x 才真正生效。 */
.grid > *, .split > *, .calc > * { min-width: 0; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r-card);
  padding: 26px; box-shadow: var(--sh);
  transition: transform .16s ease, box-shadow .16s ease;
}
.card--hover:hover { transform: translateY(-3px); box-shadow: var(--sh-lg); }
.card__icon {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center;
  background: var(--blue-50); margin-bottom: 16px;
}
.card__icon svg { width: 23px; height: 23px; }
.card__icon--green { background: var(--green-50); }
.card__icon--amber { background: var(--amber-50); }
.card h2, .card h3 { margin-bottom: 8px; font-size: 19px; }
.card p { font-size: 15px; color: var(--t2); line-height: 1.7; }

/* 痛点卡：左侧色条表达"后果"严重度（红=直接损失 / 琥珀=慢性 / 蓝=成本） */
.pain { border-left: 4px solid var(--line); }
.pain--red { border-left-color: var(--warn); }
.pain--amber { border-left-color: var(--amber); }
.pain--blue { border-left-color: var(--blue); }
.pain__tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--t3); letter-spacing: .05em; margin-bottom: 10px; }

/* 产品线卡（A 蓝 / B 绿） */
.pline { position: relative; overflow: hidden; padding: 30px; }
.pline::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--blue); }
.pline--b::before { background: var(--green); }
.pline h3 { font-size: 22px; margin-bottom: 6px; }
.pline__role { font-size: 13px; font-weight: 600; color: var(--blue); margin-bottom: 14px; }
.pline--b .pline__role { color: var(--green); }
.pline ul { margin: 16px 0 20px; display: flex; flex-direction: column; gap: 9px; }
.pline li { position: relative; padding-left: 22px; font-size: 15px; color: var(--t2); line-height: 1.6; }
.pline li::before {
  content: ""; position: absolute; left: 4px; top: 9px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--blue);
}
.pline--b li::before { background: var(--green); }
.pline__foot { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; padding-top: 18px; border-top: 1px solid var(--line); }

/* 能力小网格 */
.cap {
  display: flex; gap: 14px; align-items: flex-start;
  background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px;
}
.cap__icon { width: 40px; height: 40px; border-radius: 11px; flex: none; display: grid; place-items: center; background: var(--blue-50); }
.cap__icon svg { width: 20px; height: 20px; }
.cap__icon--green { background: var(--green-50); }
.cap h3 { font-size: 16px; margin-bottom: 4px; }
.cap p { font-size: 14px; color: var(--t2); line-height: 1.6; }

/* 试点条 */
.pilot {
  border-radius: 20px; overflow: hidden;
  background: linear-gradient(135deg, var(--green) 0%, #0E7A38 100%);
  color: #fff; padding: 38px 40px;
  display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: center;
  box-shadow: 0 16px 44px rgba(22, 163, 74, .26);
}
.pilot h2 { font-size: clamp(21px, 2.2vw, 28px); margin-bottom: 10px; }
.pilot p { font-size: 15px; color: rgba(255, 255, 255, .92); line-height: 1.7; max-width: 46em; }
.pilot__figs { display: flex; gap: 30px; margin-top: 20px; flex-wrap: wrap; }
.pilot__fig { font-family: var(--font-num); }
.pilot__fig b { display: block; font-size: 27px; font-weight: 800; line-height: 1.1; }
.pilot__fig span { font-size: 13px; color: rgba(255, 255, 255, .84); }
.pilot .btn { background: #fff; color: #0E7A38; }
.pilot .btn:hover { background: #F0FDF4; }

/* CTA 带 */
.cta {
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-end) 70%, #17406F 100%);
  color: var(--dark-t1); border-radius: 22px; padding: 48px 44px;
  display: grid; grid-template-columns: 1.15fr .85fr; gap: 44px; align-items: center;
  position: relative; overflow: hidden;
}
.cta::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(620px 320px at 88% 12%, rgba(37, 99, 235, .34), transparent 62%);
}
.cta > * { position: relative; z-index: 1; }
.cta h2 { color: #fff; margin-bottom: 12px; }
.cta p { color: var(--dark-t2); font-size: 15px; line-height: 1.75; }
.cta__form { background: rgba(255, 255, 255, .07); border: 1px solid rgba(255, 255, 255, .18); border-radius: 16px; padding: 24px; }
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 13px; color: var(--dark-t2); margin-bottom: 7px; }
.field input, .field select, .field textarea {
  width: 100%; font-family: inherit; font-size: 15px; color: #fff;
  background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 9px; padding: 12px 13px;
}
.field input::placeholder, .field textarea::placeholder { color: rgba(203, 213, 225, .6); }
.field select option { color: var(--t1); }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--blue-l); background: rgba(255, 255, 255, .12);
}
.field--row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* --------------------------------------------------------------- 页脚 --- */
.footer { background: #F1F5F9; border-top: 1px solid var(--line); padding: 56px 0 28px; }
.footer__in { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; }
.footer h4, .footer .footer__t { font-size: 14px; color: var(--t1); margin-bottom: 14px; font-weight: 700; }
.footer li { margin-bottom: 9px; }
.footer a { font-size: 14px; color: var(--t2); }
.footer a:hover { color: var(--blue); }
.footer__desc { font-size: 14px; color: var(--t2); line-height: 1.75; margin-top: 14px; max-width: 30em; }
.footer__bottom {
  margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap;
  font-size: 13px; color: var(--t3);
}
.footer__legal a { margin-right: 16px; font-size: 13px; }

/* ------------------------------------------------------- 待补素材占位 --- */
/* 用法：图位未获许可时用它占位，拿到许可后整块替换为 <img>，版式不动 */
.asset-slot {
  border: 2px dashed #CBD5E1; border-radius: var(--r-card);
  background: repeating-linear-gradient(45deg, #F8FAFC, #F8FAFC 12px, #F1F5F9 12px, #F1F5F9 24px);
  display: grid; place-items: center; text-align: center; padding: 28px; min-height: 200px;
}
.asset-slot__label { font-size: 13px; font-weight: 600; color: var(--t2); }
.asset-slot__hint { font-size: 12px; color: var(--t3); margin-top: 6px; }

/* ------------------------------------------------------------ 响应式 --- */
@media (max-width: 1024px) {
  .hero__in { grid-template-columns: 1fr; gap: 44px; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .footer__in { grid-template-columns: 1fr 1fr; gap: 28px; }
  .cta { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 768px) {
  .nav__links, .nav__cta { display: none; }
  .nav__burger { display: flex; }
  .section { padding: 60px 0; }
  .section--tight { padding: 46px 0; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 38px; }
  .hero { padding: 56px 0 52px; }
  .pilot { grid-template-columns: 1fr; padding: 30px 26px; }
  .cta { padding: 34px 24px; }
  .field--row { grid-template-columns: 1fr; }
  .footer__in { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .container, .nav__in { padding: 0 18px; }
  .card, .pline { padding: 22px; }
  .pilot__figs { gap: 20px; }
}

/* 打印：去掉交互件 */
@media print {
  .nav, .cta__form, .btn { display: none !important; }
  body { background: #fff; }
}

/* ==========================================================================
   内页组件（P1 起）：页头 / 面包屑 / 表格 / 架构层 / 步骤 / 提示块 / 测算器
   ========================================================================== */

/* ------------------------------------------------------------ 内页页头 --- */
.page-hero {
  background: linear-gradient(160deg, #0E2A4D 0%, var(--navy-end) 58%, #17406F 100%);
  color: var(--dark-t1); padding: 62px 0 58px; position: relative; overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(680px 320px at 14% 0%, rgba(37, 99, 235, .34), transparent 62%),
              radial-gradient(560px 300px at 92% 100%, rgba(22, 163, 74, .22), transparent 64%);
}
.page-hero__in { position: relative; z-index: 1; max-width: 860px; }
.page-hero h1 { color: #fff; margin-bottom: 16px; }
.page-hero .lead { color: var(--dark-t2); }
.page-hero--light { background: var(--card); color: var(--t1); border-bottom: 1px solid var(--line); }
.page-hero--light::before { display: none; }
.page-hero--light h1 { color: var(--t1); }
.page-hero--light .lead { color: var(--t2); }

.crumb { font-size: 13px; color: rgba(203, 213, 225, .78); margin-bottom: 16px; }
.crumb a { color: inherit; }
.page-hero--light .crumb { color: var(--t3); }
.crumb span { margin: 0 7px; opacity: .6; }

/* -------------------------------------------------------------- 表格 --- */
.tbl-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border: 1px solid var(--line); border-radius: var(--r-card); background: var(--card); }
table.tbl { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 560px; }
table.tbl th, table.tbl td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--line); }
table.tbl thead th { background: #F8FAFC; font-size: 13px; font-weight: 700; color: var(--t2); letter-spacing: .02em; white-space: nowrap; }
table.tbl tbody tr:last-child td { border-bottom: 0; }
table.tbl td.num, table.tbl th.num { font-family: var(--font-num); white-space: nowrap; }
table.tbl .req { color: var(--blue); font-weight: 600; }
table.tbl .opt { color: var(--t3); }

/* --------------------------------------------------- 架构五层（横向条） --- */
.layers { display: flex; flex-direction: column; gap: 12px; }
.layer {
  display: grid; grid-template-columns: 132px 1fr; gap: 22px; align-items: center;
  background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--blue);
  border-radius: 14px; padding: 20px 24px; box-shadow: var(--sh);
}
.layer:nth-child(2) { border-left-color: var(--blue-l); }
.layer:nth-child(3) { border-left-color: var(--green); }
.layer:nth-child(4) { border-left-color: var(--green-l); }
.layer:nth-child(5) { border-left-color: var(--amber); }
.layer__k { font-size: 13px; font-weight: 700; color: var(--t3); letter-spacing: .06em; }
.layer__t { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.layer__d { font-size: 14px; color: var(--t2); line-height: 1.65; }

/* ------------------------------------------------------------ 步骤条 --- */
.steps { display: grid; gap: 18px; }
.steps--4 { grid-template-columns: repeat(4, 1fr); }
.steps--3 { grid-template-columns: repeat(3, 1fr); }
.step { position: relative; padding-top: 34px; }
.step::before {
  content: attr(data-n); position: absolute; top: 0; left: 0;
  width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
  background: var(--blue-50); color: var(--blue); font-family: var(--font-num);
  font-size: 14px; font-weight: 700;
}
.step h3 { font-size: 16px; margin-bottom: 6px; }
.step p { font-size: 14px; color: var(--t2); line-height: 1.65; }

/* ------------------------------------------------------------ 提示块 --- */
.callout {
  border-radius: 14px; padding: 20px 22px; border: 1px solid var(--line);
  background: var(--card); display: flex; gap: 16px; align-items: flex-start;
}
.callout--blue { background: var(--blue-50); border-color: var(--blue-100); }
.callout--green { background: var(--green-50); border-color: var(--green-100); }
.callout--amber { background: var(--amber-50); border-color: #FDE68A; }
.callout__t { font-size: 16px; font-weight: 700; margin-bottom: 5px; }
.callout__d { font-size: 14px; color: var(--t2); line-height: 1.7; }

/* -------------------------------------------------------- 文本 + 列表 --- */
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 46px; align-items: start; }
.checklist { display: grid; gap: 12px; }
.checklist li { position: relative; padding-left: 28px; font-size: 15px; color: var(--t2); line-height: 1.65; }
.checklist li::before {
  content: ""; position: absolute; left: 4px; top: 8px; width: 12px; height: 7px;
  border-left: 2px solid var(--green); border-bottom: 2px solid var(--green);
  transform: rotate(-45deg);
}

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  font-size: 13px; color: var(--t2); background: var(--card);
  border: 1px solid var(--line); border-radius: var(--r-pill); padding: 7px 14px;
}
.chip--blue { color: var(--blue); background: var(--blue-50); border-color: var(--blue-100); }
.chip--green { color: var(--green); background: var(--green-50); border-color: var(--green-100); }

.modgroup { background: var(--card); border: 1px solid var(--line); border-radius: var(--r-card); padding: 24px; box-shadow: var(--sh); }
.modgroup h3 { font-size: 18px; margin-bottom: 4px; }
.modgroup__sub { font-size: 13px; color: var(--t3); margin-bottom: 16px; }

/* ------------------------------------------------------------ 测算器 --- */
.calc { display: grid; grid-template-columns: .9fr 1.1fr; gap: 0; border-radius: 20px; overflow: hidden; border: 1px solid var(--line); background: var(--card); box-shadow: var(--sh-lg); }
.calc__form { padding: 32px; border-right: 1px solid var(--line); }
.calc__out { padding: 32px; background: linear-gradient(160deg, var(--navy) 0%, var(--navy-end) 100%); color: var(--dark-t1); }
.calc__label { font-size: 14px; font-weight: 600; color: var(--t2); margin-bottom: 10px; display: block; }
.calc__row { margin-bottom: 22px; }
.calc input[type="range"] { width: 100%; accent-color: var(--blue); }
.calc input[type="number"] {
  width: 100%; font-family: var(--font-num); font-size: 20px; font-weight: 700;
  padding: 13px 14px; border: 1px solid var(--line); border-radius: 10px; color: var(--t1);
}
.calc__switch { display: flex; align-items: center; gap: 10px; font-size: 15px; color: var(--t2); }
.calc__switch input { width: 18px; height: 18px; accent-color: var(--green); }
.calc__big { font-family: var(--font-num); font-size: clamp(34px, 4vw, 46px); font-weight: 800; color: #fff; line-height: 1.05; }
.calc__big small { font-size: 16px; font-weight: 600; margin-left: 4px; }
.calc__k { font-size: 13px; color: rgba(203, 213, 225, .82); margin-top: 6px; }
.calc__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 26px; padding-top: 22px; border-top: 1px solid rgba(255, 255, 255, .16); }
.calc__note { font-size: 12px; color: rgba(203, 213, 225, .7); margin-top: 22px; line-height: 1.6; }
.calc__tier { font-size: 13px; color: var(--t3); margin-top: 8px; }

/* -------------------------------------------------------------- FAQ --- */
.faq { border: 1px solid var(--line); border-radius: var(--r-card); background: var(--card); overflow: hidden; }
.faq details { border-bottom: 1px solid var(--line); }
.faq details:last-child { border-bottom: 0; }
.faq summary {
  cursor: pointer; padding: 20px 24px; font-size: 16px; font-weight: 600; list-style: none;
  display: flex; justify-content: space-between; gap: 16px; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--blue); font-size: 20px; font-weight: 400; flex: none; }
.faq details[open] summary::after { content: "−"; }
.faq__body { padding: 0 24px 22px; font-size: 15px; color: var(--t2); line-height: 1.75; }

/* ------------------------------------------------------------ 响应式 --- */
@media (max-width: 1024px) {
  .split { grid-template-columns: 1fr; gap: 30px; }
  .steps--4 { grid-template-columns: repeat(2, 1fr); }
  .calc { grid-template-columns: 1fr; }
  .calc__form { border-right: 0; border-bottom: 1px solid var(--line); }
}
@media (max-width: 768px) {
  .steps--3, .steps--4 { grid-template-columns: 1fr; }
  .layer { grid-template-columns: 1fr; gap: 8px; }
  .page-hero { padding: 44px 0 40px; }
  .calc__form, .calc__out { padding: 24px; }
  .calc__grid { grid-template-columns: 1fr; gap: 18px; }
}

/* ==========================================================================
   P2 组件：浅底表单 / 同意勾选 / 机器人陷阱 / 法务排版 / 草稿横幅
   ========================================================================== */

/* 浅底表单（.field 默认是深底配色，这里整体反转） */
.field--light label { color: var(--t2); }
.field--light input, .field--light select, .field--light textarea {
  color: var(--t1); background: var(--card); border-color: var(--line);
}
.field--light input::placeholder, .field--light textarea::placeholder { color: var(--t3); }
.field--light input:focus, .field--light select:focus, .field--light textarea:focus {
  border-color: var(--blue); background: var(--card);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .12);
}

/* 机器人陷阱：真人看不见，爬虫会填 */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.consent {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: 14px; color: var(--t2); line-height: 1.65; cursor: pointer;
}
.consent input { margin-top: 4px; width: 17px; height: 17px; flex: none; accent-color: var(--blue); }
.consent a { color: var(--blue); }

/* 法务页排版 */
.legal { font-size: 16px; color: var(--t2); line-height: 1.85; }
.legal h2 { font-size: 19px; color: var(--t1); margin: 34px 0 12px; }
.legal h2:first-child { margin-top: 0; }
.legal p { margin-bottom: 12px; }
.legal ul { margin: 0 0 14px; padding-left: 0; }
.legal li { position: relative; padding-left: 20px; margin-bottom: 8px; }
.legal li::before {
  content: ""; position: absolute; left: 4px; top: 12px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--blue);
}
.legal b { color: var(--t1); }

/* 草稿横幅：给「上线前必须补齐」这件事一个看得见的出口 */
.draft-banner {
  background: #FFFBEB; border-bottom: 1px solid #FDE68A; color: #92400E;
  font-size: 14px; line-height: 1.7; padding: 14px 24px; text-align: center;
}
.draft-banner code {
  background: rgba(146, 64, 14, .12); padding: 1px 6px; border-radius: 5px;
  font-family: var(--font-num); font-size: 13px;
}

/* ==========================================================================
   P3 组件：知识库文章排版（GEO 资产页）
   格式固定 = 明确陈述 + 实测数据 + 出处 + 日期；出处块必须显眼可核对。
   ========================================================================== */

.prose { font-size: 16px; color: var(--t2); line-height: 1.9; }
.prose h2 { font-size: 22px; color: var(--t1); margin: 40px 0 14px; }
.prose h2:first-child { margin-top: 0; }
.prose h3 { font-size: 17px; color: var(--t1); margin: 26px 0 10px; }
.prose p { margin-bottom: 14px; }
.prose ul { margin: 0 0 16px; }
.prose li { position: relative; padding-left: 20px; margin-bottom: 9px; }
.prose li::before {
  content: ""; position: absolute; left: 4px; top: 13px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--blue);
}
.prose b, .prose strong { color: var(--t1); }

/* 一句话结论：GEO 要的就是这种能被直接引用的句子 */
.keyline {
  border-left: 4px solid var(--blue); background: var(--blue-50);
  border-radius: 0 12px 12px 0; padding: 18px 22px; margin: 0 0 26px;
  font-size: 17px; color: var(--t1); line-height: 1.75;
}
.keyline--green { border-left-color: var(--green); background: var(--green-50); }

/* 文章头部元信息：日期与口径 */
.article-meta {
  display: flex; flex-wrap: wrap; gap: 8px 18px;
  font-size: 13px; color: var(--t3); margin-top: 16px;
}
.article-meta b { color: var(--t2); font-weight: 600; }

/* 出处块：知识页的硬要求 */
.source-box {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--r-card); padding: 22px 24px; margin-top: 34px;
}
.source-box h3 { font-size: 15px; color: var(--t1); margin-bottom: 12px; }
.source-box ol { margin: 0; padding-left: 0; counter-reset: s; }
.source-box li {
  position: relative; padding-left: 26px; margin-bottom: 11px;
  font-size: 14px; color: var(--t2); line-height: 1.7;
}
.source-box li::before {
  counter-increment: s; content: counter(s);
  position: absolute; left: 0; top: 2px;
  width: 18px; height: 18px; border-radius: 5px;
  background: var(--blue-50); color: var(--blue);
  font-family: var(--font-num); font-size: 11px; font-weight: 700;
  display: grid; place-items: center;
}
.source-box a { word-break: break-all; }

/* 知识库索引卡 */
.kcard { display: flex; flex-direction: column; }
.kcard__tag { font-size: 12px; font-weight: 600; color: var(--blue); margin-bottom: 10px; }
.kcard h3 { font-size: 19px; margin-bottom: 10px; }
.kcard p { flex: 1; }
.kcard__foot {
  margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line);
  font-size: 13px; color: var(--t3); display: flex; justify-content: space-between; gap: 12px;
}

/* ==========================================================================
   P4 组件：客户专属方案页（/p/<token>.html）
   这些页不在公开导航里，用独立的顶部条 + 「勿转发」提示条。
   ========================================================================== */

.prop-bar {
  background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 50;
}
.prop-bar__in { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 64px; }
.prop-bar__badge {
  font-size: 13px; font-weight: 600; color: var(--blue);
  background: var(--blue-50); border: 1px solid var(--blue-100);
  border-radius: var(--r-pill); padding: 6px 14px; white-space: nowrap;
}

.prop-warn {
  background: #FFFBEB; border-bottom: 1px solid #FDE68A; color: #92400E;
  font-size: 14px; line-height: 1.7; padding: 13px 24px; text-align: center;
}

.prop-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  margin-top: 30px; padding-top: 26px; border-top: 1px solid var(--line);
}
.prop-stats > div { display: flex; align-items: baseline; gap: 6px; }
.prop-stats b {
  font-family: var(--font-num); font-size: 30px; font-weight: 800; color: var(--blue); line-height: 1;
}
.prop-stats span { font-size: 13px; color: var(--t3); }

.prop-cost { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.prop-cost__item {
  background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--line);
  border-radius: 14px; padding: 22px 24px; display: flex; flex-direction: column; gap: 6px;
}
.prop-cost__item--hl { border-left-color: var(--blue); background: var(--blue-50); }
.prop-cost__k { font-size: 13px; font-weight: 600; color: var(--t3); }
.prop-cost__v { font-family: var(--font-num); font-size: 30px; font-weight: 800; color: var(--t1); line-height: 1.1; }
.prop-cost__v small { font-size: 14px; font-weight: 600; color: var(--t2); }
.prop-cost__d { font-size: 13px; color: var(--t2); line-height: 1.6; }

@media (max-width: 768px) {
  .prop-bar__in { height: auto; padding: 12px 0; flex-direction: column; align-items: flex-start; gap: 8px; }
  .prop-stats { grid-template-columns: repeat(2, 1fr); }
  .prop-cost { grid-template-columns: 1fr; }
  .prop-cost__v { font-size: 26px; }
}