/* 浅色系 · 工业科技感
   配方参考 Apple 浅色页：纯白与 #f5f5f7 交替、近黑字、单一蓝、细边框 + 极淡阴影 */
:root {
  --bg: #ffffff;
  --bg-alt: #f5f5f7;
  --card: #ffffff;
  --card-alt: #fafafc;
  --line: #d2d2d7;
  --line-soft: #e8e8ed;
  --ink: #1d1d1f;
  --ink-2: #424245;
  --grey: #6e6e73;
  --grey-dim: #86868b;
  --blue: #0071e3;
  --blue-hi: #0077ed;
  --blue-soft: #e8f2fe;
  --cyan: #00a1f1;
  --green: #00875a;
  --amber: #b25000;
  --grad: linear-gradient(96deg, #0071e3 0%, #00a1f1 55%, #35c4f0 100%);
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 16px rgba(0,0,0,.07), 0 1px 3px rgba(0,0,0,.05);
  --shadow-lg: 0 18px 48px -12px rgba(0,0,0,.16), 0 2px 8px rgba(0,0,0,.05);
  --shadow-blue: 0 14px 40px -12px rgba(0,113,227,.42);
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI",
          "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 28px; }
.wrap-narrow { max-width: 820px; margin: 0 auto; padding: 0 28px; }

/* 阅读进度条 */
.progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0;
  background: var(--grad); z-index: 60; transition: width .1s linear;
}

/* ---------- 顶部导航：白色毛玻璃 ---------- */
.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .78);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, .09);
}
.nav-inner {
  display: flex; align-items: center; gap: 26px;
  height: 52px; max-width: 1120px; margin: 0 auto; padding: 0 28px;
}
.logo {
  font-size: 14px; font-weight: 600; color: var(--ink);
  text-decoration: none; white-space: nowrap; letter-spacing: -.01em;
}
.logo span {
  font-family: var(--mono); font-size: 10.5px; font-weight: 500;
  letter-spacing: .1em;
  background: var(--grad); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}

.nav-links { display: flex; gap: 26px; margin-left: auto; align-items: center; }
.nav-links a {
  position: relative; font-size: 13px; color: var(--ink-2);
  text-decoration: none; padding: 3px 0; white-space: nowrap;
  transition: color .2s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1.5px;
  background: var(--grad); transform: scaleX(0); transform-origin: left;
  transition: transform .25s ease;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a:hover::after, .nav-links a.on::after { transform: scaleX(1); }
.nav-links a.on { color: var(--ink); font-weight: 600; }

.nav-links a.nav-cta {
  background: var(--blue); color: #fff; font-weight: 600;
  padding: 7px 15px; border-radius: 980px;
  transition: background .2s, transform .2s;
}
.nav-links a.nav-cta::after { display: none; }
.nav-links a.nav-cta:hover { background: var(--blue-hi); transform: scale(1.03); color: #fff; }

.nav-toggle {
  display: none; margin-left: auto; background: none;
  border: 1px solid var(--line); color: var(--ink-2);
  border-radius: 6px; padding: 5px 10px; font-size: 15px;
  cursor: pointer; line-height: 1;
}

/* ---------- 区块与排版节奏 ---------- */
section { padding: 124px 0; position: relative; scroll-margin-top: 52px; }
section:nth-of-type(even) { background: var(--bg-alt); }

.eyebrow {
  font-family: var(--mono); font-size: 11px; letter-spacing: .22em;
  text-transform: uppercase; margin: 0 0 20px; font-weight: 600;
  background: var(--grad); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}

h1, h2, h3, h4 { margin: 0; line-height: 1.08; letter-spacing: -.035em; font-weight: 700; color: var(--ink); }
h2 { font-size: clamp(30px, 4.4vw, 52px); margin-bottom: 18px; }
h3 { font-size: 18px; line-height: 1.3; letter-spacing: -.02em; margin-bottom: 9px; font-weight: 600; }

.lede { color: var(--grey); font-size: 19px; line-height: 1.7; max-width: 60ch; margin: 0 0 40px; }
.lede b { color: var(--ink); font-weight: 600; }

.kicker {
  font-size: clamp(20px, 2.3vw, 27px); line-height: 1.5;
  color: var(--ink); font-weight: 600; letter-spacing: -.025em;
  max-width: 32ch; margin: 0 0 44px;
}
.kicker b {
  background: var(--grad); -webkit-background-clip: text;
  background-clip: text; color: transparent; font-weight: 700;
}
.kicker.wide { max-width: 44ch; }

/* 中文标题不在词中间断行 */
.nb { display: inline-block; white-space: nowrap; }
@media (max-width: 560px) { .nb { white-space: normal; } }

/* ---------- Hero ---------- */
.hero {
  padding: 128px 0 92px; position: relative; overflow: hidden;
  background:
    radial-gradient(1000px 480px at 78% 6%, rgba(0,113,227,.09), transparent 64%),
    linear-gradient(180deg, #fbfcfe 0%, var(--bg) 62%);
}
.hero-grid { display: grid; grid-template-columns: 1.02fr .98fr; gap: 56px; align-items: center; }
.hero h1 {
  font-size: clamp(40px, 6.4vw, 76px); line-height: 1.04;
  letter-spacing: -.045em; max-width: 15ch;
}
.hero h1 em {
  font-style: normal;
  background: var(--grad); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}
.hero .sub {
  color: var(--grey); font-size: clamp(16px, 1.5vw, 19.5px);
  line-height: 1.72; max-width: 52ch; margin: 28px 0 40px;
}
.hero .sub b { color: var(--ink); font-weight: 600; }
.hero-fig { width: 100%; height: auto; display: block; }

/* 资质带 */
.creds {
  margin-top: 72px; padding-top: 26px;
  border-top: 1px solid var(--line-soft);
  display: flex; flex-wrap: wrap; gap: 12px 34px;
  font-family: var(--mono); font-size: 11.5px; color: var(--grey-dim);
  letter-spacing: .06em;
}

/* ---------- 按钮 ---------- */
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.btn {
  display: inline-block; padding: 13px 27px; border-radius: 980px;
  font-size: 15.5px; font-weight: 600; text-decoration: none; cursor: pointer;
  border: 1px solid transparent; font-family: inherit; letter-spacing: -.01em;
  transition: background .22s, border-color .22s, color .22s, transform .22s, box-shadow .22s;
}
.btn-primary { background: var(--blue); color: #fff; box-shadow: var(--shadow-blue); }
.btn-primary:hover { background: var(--blue-hi); transform: translateY(-2px); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-ghost:hover { border-color: var(--ink); background: #fff; transform: translateY(-2px); }

/* ---------- 图形容器 ---------- */
figure { margin: 0; }
figure.band { margin: 44px 0 0; padding: 28px 0 0; border-top: 1px solid var(--line-soft); }
figure.band img { width: 100%; height: auto; display: block; }
figcaption {
  font-family: var(--mono); font-size: 11px; color: var(--grey-dim);
  margin-top: 13px; letter-spacing: .07em;
}

/* 照片：浅底下轻微提亮去灰，避免脏 */
.photo { position: relative; border-radius: 16px; overflow: hidden; box-shadow: var(--shadow-md); }
.photo img {
  width: 100%; display: block; aspect-ratio: 16 / 9; object-fit: cover;
  filter: saturate(.92) contrast(1.02);
}
.photo-cap {
  position: absolute; left: 18px; bottom: 14px; z-index: 2;
  font-family: var(--mono); font-size: 11px; color: #fff;
  letter-spacing: .06em; text-shadow: 0 1px 6px rgba(0,0,0,.6);
}

/* ---------- 通用卡片 ---------- */
.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 1080px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }

.card {
  position: relative; background: var(--card);
  border: 1px solid var(--line-soft); border-radius: 16px; padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: border-color .22s, box-shadow .22s, transform .22s;
}
.card:hover { border-color: rgba(0,113,227,.4); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.card p { color: var(--grey); font-size: 15px; margin: 0; line-height: 1.68; }
.card .tag {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em;
  text-transform: uppercase; display: block; margin-bottom: 13px; font-weight: 600;
  background: var(--grad); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}

/* ---------- 痛点卡 ---------- */
.pain {
  position: relative; background: var(--card);
  border: 1px solid var(--line-soft); border-radius: 16px;
  padding: 26px 26px 26px 28px; overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: border-color .22s, box-shadow .22s, transform .22s;
  text-align: left;
}
.pain::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--grad); opacity: .55; transition: opacity .22s;
}
.pain:hover { border-color: rgba(0,113,227,.4); box-shadow: var(--shadow-md); transform: translateY(-3px); }
.pain:hover::before { opacity: 1; }
.pain-no {
  font-family: var(--mono); font-size: 11px; color: var(--grey-dim);
  letter-spacing: .14em; display: block; margin-bottom: 10px;
}
.pain h3 { font-size: 17px; }
.pain p { color: var(--grey); font-size: 14.5px; margin: 0; line-height: 1.7; }

/* ---------- 产品演示：仿真 Power Apps 界面（浅色版） ---------- */
.device {
  position: relative; border-radius: 18px; overflow: hidden;
  background: #fff; border: 1px solid var(--line-soft);
  box-shadow: var(--shadow-lg);
}
.device-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 11px 14px; background: #f6f6f8;
  border-bottom: 1px solid var(--line-soft);
}
.dot { width: 9px; height: 9px; border-radius: 50%; background: #d6d6db; }
.device-title {
  margin-left: 8px; font-family: var(--mono); font-size: 10.5px;
  color: var(--grey-dim); letter-spacing: .08em;
}
.device-body { padding: 18px; }

.mock-kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 14px; }
.mock-kpi {
  background: var(--card-alt); border: 1px solid var(--line-soft);
  border-radius: 12px; padding: 12px 13px;
}
.mock-kpi .lbl {
  font-family: var(--mono); font-size: 9px; color: var(--grey-dim);
  letter-spacing: .12em; text-transform: uppercase;
}
.mock-kpi .num {
  font-family: var(--mono); font-size: 23px; font-weight: 700; line-height: 1.25;
  background: var(--grad); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}
.mock-kpi .num small { font-size: 11px; font-weight: 400; }

.mock-chart {
  background: var(--card-alt); border: 1px solid var(--line-soft);
  border-radius: 12px; padding: 14px; margin-bottom: 12px;
}
.mock-chart .ttl {
  font-family: var(--mono); font-size: 9.5px; color: var(--grey-dim);
  letter-spacing: .12em; text-transform: uppercase; margin-bottom: 12px;
}
.bar-row { display: flex; align-items: center; gap: 10px; margin-bottom: 9px; }
.bar-row:last-child { margin-bottom: 0; }
.bar-lbl { font-size: 11px; color: var(--ink-2); width: 74px; flex-shrink: 0; }
.bar-track { flex: 1; height: 7px; background: #e6e6eb; border-radius: 4px; overflow: hidden; }
.bar-fill {
  height: 100%; border-radius: 4px; background: var(--grad);
  width: 0; transition: width 1.1s cubic-bezier(.2,.7,.2,1);
}
.device.in .bar-fill { width: var(--w, 50%); }
.bar-val {
  font-family: var(--mono); font-size: 10.5px; color: var(--grey-dim);
  width: 40px; text-align: right; flex-shrink: 0;
}

.mock-rows { display: grid; gap: 7px; }
.mock-row {
  display: flex; align-items: center; gap: 10px;
  background: var(--card-alt); border: 1px solid var(--line-soft);
  border-radius: 10px; padding: 9px 12px; font-size: 11.5px; color: var(--ink-2);
}
.pill {
  font-family: var(--mono); font-size: 9px; letter-spacing: .1em;
  padding: 3px 8px; border-radius: 980px; flex-shrink: 0; font-weight: 700;
}
.pill.ok { background: #e3f6ee; color: var(--green); }
.pill.run { background: var(--blue-soft); color: var(--blue); }
.pill.wait { background: #fdeee0; color: var(--amber); }
.mock-row .who { margin-left: auto; font-family: var(--mono); font-size: 10px; color: var(--grey-dim); }

/* ---------- 三阶段交付 ---------- */
.stage {
  display: grid; grid-template-columns: 74px 1fr 262px; gap: 30px;
  padding: 34px 0; border-bottom: 1px solid var(--line-soft); align-items: start;
  text-align: left;
}
.stage:last-child { border-bottom: none; }
.stage-no {
  font-family: var(--mono); font-size: 40px; font-weight: 700; line-height: 1;
  background: var(--grad); -webkit-background-clip: text;
  background-clip: text; color: transparent; opacity: .75;
}
.stage-body p { color: var(--grey); font-size: 15px; margin: 9px 0 0; line-height: 1.72; }
.stage-body p b { color: var(--ink); font-weight: 600; }
.stage-dur {
  font-family: var(--mono); font-size: 11px; color: var(--grey-dim);
  margin-top: 12px; letter-spacing: .1em;
}
.stage-price {
  font-size: 13.5px; color: var(--ink-2); background: var(--card);
  border: 1px solid var(--line-soft); border-radius: 14px;
  padding: 16px 18px; line-height: 1.68; box-shadow: var(--shadow-sm);
}
.stage-price b { color: var(--blue); font-weight: 700; }

/* ---------- 案例 ---------- */
.case {
  background: var(--card); border: 1px solid var(--line-soft);
  border-radius: 18px; padding: 30px; box-shadow: var(--shadow-sm);
  text-align: left;
}
a.case-link {
  display: block; text-decoration: none; color: inherit;
  transition: border-color .22s, box-shadow .22s, transform .22s;
}
a.case-link:hover { border-color: rgba(0,113,227,.4); box-shadow: var(--shadow-md); transform: translateY(-3px); }
a.case-link .more {
  display: inline-block; margin-top: 20px; font-size: 13.5px; font-weight: 600;
  color: var(--blue);
}
.case-who {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em;
  margin-bottom: 15px; font-weight: 600;
  background: var(--grad); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}
.case dl {
  display: grid; grid-template-columns: 88px 1fr; gap: 13px 20px;
  margin: 22px 0 0; font-size: 15px;
}
.case dt {
  color: var(--grey-dim); font-family: var(--mono); font-size: 11px;
  padding-top: 4px; letter-spacing: .08em;
}
.case dd { margin: 0; color: var(--grey); line-height: 1.72; }
.case dd b { color: var(--ink); font-weight: 600; }
.metric { font-family: var(--mono); color: var(--ink); }
.metric b { color: var(--blue); font-weight: 700; }
.mech { color: var(--amber) !important; }

/* 首页案例摘要卡 */
.case-sum { color: var(--grey); font-size: 15px; margin: 11px 0 0; line-height: 1.68; }
.case-metric { margin: 18px 0 0; font-size: 14.5px; }
.demo-note { color: var(--amber); font-size: 13px; margin: 10px 0 0; }

/* ---------- 案例对比条：把「1小时 → 15分钟」画出来 ---------- */
.cmp { margin: 20px 0 0; display: grid; gap: 10px; }
.cmp-row { display: grid; grid-template-columns: 52px 1fr 64px; gap: 11px; align-items: center; }
.cmp-k {
  font-family: var(--mono); font-size: 10px; color: var(--grey-dim);
  letter-spacing: .12em; text-transform: uppercase;
}
.cmp-track { height: 9px; background: #e6e6eb; border-radius: 5px; overflow: hidden; }
.cmp-fill { height: 100%; border-radius: 5px; width: 0; transition: width 1s cubic-bezier(.2,.7,.2,1); }
.cmp-fill.before { background: linear-gradient(90deg, #c9ccd2, #aeb2ba); }
.cmp-fill.after { background: var(--grad); }
.card.in .cmp-fill, .case.in .cmp-fill { width: var(--w, 50%); }
.cmp-v {
  font-family: var(--mono); font-size: 11.5px; text-align: right;
  color: var(--grey); letter-spacing: .02em;
}
.cmp-row.is-after .cmp-v { color: var(--blue); font-weight: 700; }
.cmp-save {
  font-family: var(--mono); font-size: 11px; color: var(--green);
  letter-spacing: .08em; margin-top: 2px; font-weight: 600;
}

/* ---------- 自查工具 ---------- */
.tool {
  background: var(--card); border: 1px solid var(--line-soft);
  border-radius: 20px; padding: 38px; box-shadow: var(--shadow-md);
  text-align: left;
}
.q {
  display: flex; gap: 15px; padding: 15px 0; align-items: flex-start;
  border-bottom: 1px solid var(--line-soft);
}
.q:last-of-type { border-bottom: none; }
.q input {
  margin: 4px 0 0; width: 18px; height: 18px; flex-shrink: 0;
  accent-color: var(--blue); cursor: pointer;
}
.q label { font-size: 15.5px; color: var(--ink-2); cursor: pointer; line-height: 1.62; }
.q label b { color: var(--ink); font-weight: 600; }
.q:hover label { color: var(--ink); }

.tool-actions { display: flex; gap: 13px; flex-wrap: wrap; align-items: center; margin-top: 26px; }
.tool-hint { font-size: 13px; color: var(--grey-dim); margin: 14px 0 0; line-height: 1.7; max-width: 60ch; }

/* 结果面板：计算后由 JS 加 .on 才显示。
   重写配色时漏了这条规则，导致空结果一直挂在页面上。 */
#result { display: none; margin-top: 32px; padding-top: 30px; border-top: 1px solid var(--line); }
#result.on { display: block; }

.score-row { display: flex; gap: 44px; flex-wrap: wrap; margin-bottom: 28px; }
.score-item .k {
  font-family: var(--mono); font-size: 10.5px; color: var(--grey-dim);
  letter-spacing: .16em; text-transform: uppercase;
}
.score-item .v {
  font-family: var(--mono); font-size: 44px; font-weight: 700; line-height: 1.1;
  letter-spacing: -.03em;
  background: var(--grad); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}
.score-item .u { font-size: 13px; color: var(--grey); font-weight: 400; }

.rec {
  background: var(--card-alt); border: 1px solid var(--line-soft);
  border-radius: 14px; padding: 18px 20px; margin-bottom: 12px;
  position: relative; overflow: hidden;
}
.rec::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--grad);
}
.rec h4 { margin: 0 0 8px; font-size: 15.5px; font-weight: 600; letter-spacing: -.015em; }
.rec p { margin: 0; font-size: 14px; color: var(--grey); line-height: 1.68; }
.rec .prio {
  font-family: var(--mono); font-size: 10px; color: var(--amber);
  letter-spacing: .16em; font-weight: 700;
}
.disclaim {
  font-size: 12px; color: var(--grey-dim); margin-top: 22px;
  font-family: var(--mono); line-height: 1.85; white-space: pre-line;
}

/* ---------- FAQ ---------- */
details { border-bottom: 1px solid var(--line-soft); padding: 21px 0; text-align: left; }
details summary {
  cursor: pointer; font-size: 17px; font-weight: 600; list-style: none;
  color: var(--ink); letter-spacing: -.02em; transition: color .2s;
  display: flex; gap: 12px; align-items: baseline;
}
details summary:hover { color: var(--blue); }
details summary::-webkit-details-marker { display: none; }
details summary::before {
  content: "+"; font-family: var(--mono); font-weight: 400; flex-shrink: 0;
  color: var(--blue); font-size: 17px;
}
details[open] summary::before { content: "−"; }
details p {
  color: var(--grey); font-size: 15px; margin: 14px 0 0;
  padding-left: 29px; line-height: 1.78; max-width: 68ch;
}

/* ---------- 表单 ---------- */
.form-sec { background: var(--bg-alt); }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; max-width: 680px; }
.field { display: flex; flex-direction: column; gap: 9px; text-align: left; }
.field.full { grid-column: 1 / -1; }
.field label {
  font-size: 11px; color: var(--grey-dim); font-family: var(--mono);
  letter-spacing: .14em; text-transform: uppercase;
}
.field input, .field select, .field textarea {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 16px; color: var(--ink); font-size: 15.5px; font-family: inherit;
  transition: border-color .2s, box-shadow .2s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--blue);
  box-shadow: 0 0 0 4px rgba(0,113,227,.14);
}
.field .err { font-size: 12px; color: #c8102e; min-height: 15px; }
.form-note { font-size: 12.5px; color: var(--grey-dim); margin: 18px 0 0; line-height: 1.75; max-width: 62ch; }

/* ---------- 隐私声明 + 同意勾选（PIPL 告知与同意） ---------- */
.privacy-box {
  background: var(--card-alt); border: 1px solid var(--line-soft);
  border-radius: 12px; padding: 14px 16px; margin-bottom: 14px;
}
.privacy-box summary {
  cursor: pointer; font-size: 13px; color: var(--grey);
  list-style: none; font-family: inherit; letter-spacing: normal;
  text-transform: none;
}
.privacy-box summary::-webkit-details-marker { display: none; }
.privacy-box summary::before { content: '▸ '; color: var(--blue); font-weight: 700; }
.privacy-box[open] summary::before { content: '▾ '; }
.privacy-box[open] summary { margin-bottom: 11px; }
.privacy-box ul { margin: 0; padding-left: 18px; display: grid; gap: 7px; }
.privacy-box li { font-size: 12.5px; color: var(--grey); line-height: 1.7; }
.privacy-box b { color: var(--ink); }

.field label.consent-row {
  display: flex; align-items: flex-start; gap: 10px; cursor: pointer;
  font-size: 13.5px; color: var(--grey); line-height: 1.6;
  font-family: inherit; letter-spacing: normal; text-transform: none;
}
.field label.consent-row input[type="checkbox"] {
  width: 17px; height: 17px; margin: 1px 0 0; flex: 0 0 auto;
  padding: 0; border-radius: 4px; accent-color: var(--blue); cursor: pointer;
}
.field label.consent-row b { color: var(--ink); }

.form-ok {
  background: #fff; border: 1px solid rgba(0,113,227,.35);
  border-radius: 16px; padding: 26px; margin-top: 22px;
  box-shadow: var(--shadow-sm);
}
.form-ok p { color: var(--grey); font-size: 14.5px; margin: 8px 0 0; line-height: 1.7; }

/* 提交失败提示（默认隐藏，.on 才显示） */
#form-err {
  display: none; margin: 14px 0 0; padding: 12px 15px;
  background: #fff5f5; border: 1px solid rgba(200,16,46,.3);
  border-left: 3px solid #c8102e; border-radius: 8px;
  color: #c8102e; font-size: 13.5px; line-height: 1.6;
}
#form-err.on { display: block; }

/* ---------- 页脚 ---------- */
footer { padding: 52px 0; border-top: 1px solid var(--line-soft); background: var(--bg); }
footer p {
  margin: 0 0 7px; font-size: 12.5px; color: var(--grey-dim);
  font-family: var(--mono); letter-spacing: .04em;
}

/* ---------- 版式分化 ---------- */
.center { text-align: center; }
.center .kicker, .center .lede { margin-left: auto; margin-right: auto; }
.center .kicker { max-width: 34ch; }
.center .cta-row { justify-content: center; }

/* 大字宣言屏：浅色下用淡蓝底把它与前后屏区分开 */
.statement {
  padding: 128px 0; text-align: center;
  background:
    radial-gradient(760px 400px at 50% 0%, rgba(0,113,227,.10), transparent 68%),
    var(--bg-alt);
}
.statement p {
  font-size: clamp(26px, 4.6vw, 54px); line-height: 1.24;
  font-weight: 700; letter-spacing: -.04em; margin: 0 auto;
  max-width: 20ch; color: var(--ink); text-wrap: balance;
}
.statement p b {
  background: var(--grad); -webkit-background-clip: text;
  background-clip: text; color: transparent;
}
.statement .by {
  font-family: var(--mono); font-size: 11px; color: var(--grey-dim);
  letter-spacing: .18em; margin-top: 26px; text-transform: uppercase;
}

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 62px; align-items: center; }
.split.flip > *:first-child { order: 2; }

/* ---------- 入场动画 ----------
   .reveal 由 JS 添加；JS 未跑时内容不会被隐藏。 */
@media (prefers-reduced-motion: no-preference) {
  .reveal { opacity: 0; transform: translateY(16px); will-change: opacity, transform; }
  .reveal.in {
    opacity: 1; transform: none;
    transition: opacity .55s ease, transform .55s ease;
  }
}

/* ---------- 移动端 ---------- */
@media (max-width: 860px) {
  .wrap, .wrap-narrow { padding: 0 20px; }
  .nav-inner { height: 50px; padding: 0 20px; gap: 14px; }
  .nav-links {
    display: none; position: absolute; top: 50px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(255,255,255,.98); backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--line); padding: 6px 20px 18px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 0; border-bottom: 1px solid var(--line-soft); font-size: 15px; }
  .nav-links a::after { display: none; }
  .nav-links a.on { color: var(--blue); }
  .nav-links a.nav-cta { margin-top: 14px; text-align: center; padding: 12px 16px; }
  .nav-toggle { display: block; }
  .hero { padding: 72px 0 56px; }
  .hero-grid { grid-template-columns: 1fr; gap: 34px; }
  .hero h1 { max-width: none; }
  .creds { margin-top: 44px; gap: 10px 22px; }
  section { padding: 68px 0; }
  .statement { padding: 74px 0; }
  .center .kicker { max-width: none; }
  .grid-2, .grid-3, .form-grid { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 30px; }
  .split.flip > *:first-child { order: 0; }
  .stage { grid-template-columns: 48px 1fr; gap: 16px; padding: 26px 0; }
  .stage-no { font-size: 30px; }
  .stage-price { grid-column: 2; }
  .tool { padding: 22px; border-radius: 16px; }
  .kicker { max-width: none; }
  .score-row { gap: 26px; }
  .score-item .v { font-size: 33px; }
  .case { padding: 24px; }
  .case dl { grid-template-columns: 1fr; gap: 3px 0; }
  .case dt { padding-top: 12px; }
  details p { padding-left: 0; }
}