/* ============================================================
   拓界科技 · 企业官网  |  现代简约 · 橙红 #e8543f
   设计 Token 与全局样式（预览区"设计"面板可直接修改 :root）
   ============================================================ */

:root {
  /* 品牌色 */
  --brand: #e8543f;
  --brand-dark: #c93e2b;
  --brand-soft: #fdeeeb;

  /* 中性色 */
  --ink: #201c19;
  --ink-2: #4a443f;
  --muted: #857c74;
  --bg: #faf8f5;
  --surface: #ffffff;
  --line: #eae4dd;

  /* 字体与字号 */
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --fs-hero: clamp(2.4rem, 5.2vw, 4rem);
  --fs-h2: clamp(1.7rem, 3.2vw, 2.5rem);
  --fs-h3: 1.25rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;

  /* 圆角与阴影 */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --shadow-sm: 0 1px 2px rgba(32, 28, 25, 0.05);
  --shadow-md: 0 10px 30px -12px rgba(32, 28, 25, 0.14);
  --shadow-lg: 0 24px 60px -20px rgba(32, 28, 25, 0.22);

  /* 布局 */
  --container: 1180px;
  --header-h: 72px;

  /* 动效 */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
::selection { background: var(--brand); color: #fff; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ---------- 通用组件 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; border: 1px solid transparent;
  font-size: 0.95rem; font-weight: 600; line-height: 1;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 8px 20px -8px rgba(232, 84, 63, 0.55); }
.btn-primary:hover { background: var(--brand-dark); transform: translateY(-2px); box-shadow: 0 14px 28px -8px rgba(232, 84, 63, 0.6); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--brand-dark); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -10px rgba(0, 0, 0, 0.3); }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: var(--fs-small); font-weight: 600; letter-spacing: 0.14em;
  color: var(--brand); text-transform: uppercase;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--brand); border-radius: 2px; }

.section { padding: 104px 0; }
.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head h2 { font-size: var(--fs-h2); line-height: 1.25; font-weight: 700; letter-spacing: -0.02em; margin: 14px 0 12px; }
.section-head p { color: var(--muted); font-size: 1.05rem; }

/* 滚动入场动效 */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }
.reveal[data-delay="4"] { transition-delay: 0.4s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 顶部导航 ---------- */
.header {
  position: fixed; inset: 0 0 auto; z-index: 100; height: var(--header-h);
  transition: background 0.3s, box-shadow 0.3s, border-color 0.3s;
  border-bottom: 1px solid transparent;
}
.header.scrolled {
  background: rgba(250, 248, 245, 0.86);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}
.header-inner { height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; letter-spacing: 0.02em; }
.logo-mark { width: 32px; height: 32px; flex: none; }
.logo small { display: block; font-size: 0.62rem; font-weight: 500; color: var(--muted); letter-spacing: 0.3em; line-height: 1.2; }

.nav { display: flex; align-items: center; gap: 26px; }
.nav a { font-size: 0.95rem; font-weight: 500; color: var(--ink-2); position: relative; transition: color 0.2s; }
.nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 2px;
  background: var(--brand); border-radius: 2px; transition: right 0.3s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after { right: 0; }
.header-cta { display: flex; align-items: center; gap: 14px; }

.nav-toggle {
  display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: var(--r-sm);
  background: var(--surface); position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 50%; width: 18px; height: 2px; background: var(--ink);
  border-radius: 2px; transform: translateX(-50%); transition: transform 0.3s var(--ease), top 0.3s, opacity 0.2s;
}
.nav-toggle span { top: 50%; margin-top: -1px; }
.nav-toggle span::before { top: -6px; left: 0; transform: none; }
.nav-toggle span::after { top: 6px; left: 0; transform: none; }
body.menu-open .nav-toggle span { background: transparent; }
body.menu-open .nav-toggle span::before { top: 0; transform: rotate(45deg); }
body.menu-open .nav-toggle span::after { top: 0; transform: rotate(-45deg); }

/* ---------- Hero ---------- */
.hero { position: relative; padding: calc(var(--header-h) + 72px) 0 88px; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; top: -260px; right: -180px; width: 640px; height: 640px;
  background: radial-gradient(closest-side, rgba(232, 84, 63, 0.1), transparent 70%);
  pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 64px; align-items: center; }
.hero h1 {
  font-size: var(--fs-hero); line-height: 1.18; font-weight: 700; letter-spacing: -0.03em; margin: 18px 0 20px;
}
.hero h1 em { font-style: normal; color: var(--brand); position: relative; }
.hero h1 em::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 6px; height: 10px;
  background: var(--brand-soft); z-index: -1; border-radius: 4px;
}
.hero-lede { font-size: 1.12rem; color: var(--muted); max-width: 34em; margin-bottom: 24px; }
.hero-pain {
  max-width: 33em; margin: 0 0 34px;
  padding-left: 18px; border-left: 2px solid var(--brand);
}
.hero-pain h2 {
  font-size: 1.14rem; font-weight: 700; letter-spacing: -0.01em;
  color: var(--ink); line-height: 1.4; margin-bottom: 6px;
}
.hero-pain p { font-size: 0.95rem; color: var(--muted); line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 44px; }
.hero-meta { display: flex; gap: 36px; border-top: 1px solid var(--line); padding-top: 26px; }
.hero-meta b { display: block; font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; }
.hero-meta span { font-size: var(--fs-small); color: var(--muted); }

.hero-visual { position: relative; }
.hero-visual .frame {
  border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-lg);
  transform: rotate(1.2deg); transition: transform 0.5s var(--ease);
}
.hero-visual .frame:hover { transform: rotate(0deg) scale(1.01); }
.hero-visual .frame img { width: 100%; aspect-ratio: 3/2; object-fit: cover; }
.float-card {
  position: absolute; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-md); box-shadow: var(--shadow-md); padding: 14px 18px;
  display: flex; align-items: center; gap: 12px; font-size: var(--fs-small); font-weight: 600;
  animation: float 5s ease-in-out infinite;
}
.float-card .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--brand); flex: none; }
.float-card small { display: block; font-weight: 400; color: var(--muted); }
.float-card.fc-1 { top: 26px; left: -34px; }
.float-card.fc-2 { bottom: 40px; right: -26px; animation-delay: 2.2s; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@media (prefers-reduced-motion: reduce) { .float-card { animation: none; } }

/* ---------- 客户 Logo 墙 ---------- */
.logos { border-block: 1px solid var(--line); padding: 34px 0; background: var(--surface); }
.logos-inner { display: flex; flex-direction: column; align-items: center; gap: 16px; text-align: center; }
.logos .label { font-size: var(--fs-small); color: var(--muted); letter-spacing: 0.1em; }
.logos ul { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 34px; max-width: 900px; }
.logos li { font-weight: 700; font-size: 1.02rem; color: #b3aaa1; letter-spacing: 0.04em; transition: color 0.25s; }
.logos li:hover { color: var(--ink-2); }

/* ---------- 数据指标 ---------- */
.stats { padding: 0; margin-top: -70px; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.stat { background: var(--bg); padding: 28px 32px 40px; transition: background 0.3s; }
.stat:hover { background: var(--surface); }
.stat b { display: flex; align-items: baseline; font-size: clamp(2.2rem, 3.9vw, 3.2rem); font-weight: 700; letter-spacing: -0.03em; color: var(--ink); font-variant-numeric: tabular-nums; }
.stat b i { font-style: normal; color: var(--brand); font-size: 0.55em; margin-left: 4px; font-weight: 700; }
.stat span { display: block; margin-top: 8px; color: var(--muted); font-size: 0.95rem; }
.stat .count { transition: color 0.4s var(--ease); font-variant-numeric: tabular-nums; }
.stat .count.tick { color: var(--brand); }
.stat-label { display: flex; align-items: center; gap: 7px; }
.live-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--brand); flex: none;
  box-shadow: 0 0 0 0 rgba(232, 84, 63, 0.5); animation: livePulse 2s infinite;
}
@keyframes livePulse {
  0% { box-shadow: 0 0 0 0 rgba(232, 84, 63, 0.45); }
  70% { box-shadow: 0 0 0 7px rgba(232, 84, 63, 0); }
  100% { box-shadow: 0 0 0 0 rgba(232, 84, 63, 0); }
}
@media (prefers-reduced-motion: reduce) { .live-dot { animation: none; } }

/* ---------- 服务 ---------- */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.service {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 34px 30px; position: relative; overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.3s;
}
.service:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: #f0cfc8; }
.service-icon {
  width: 52px; height: 52px; border-radius: 14px; background: var(--brand-soft); color: var(--brand);
  display: grid; place-items: center; margin-bottom: 22px;
}
.service-icon svg { width: 26px; height: 26px; }
.service h3 { font-size: var(--fs-h3); font-weight: 700; margin-bottom: 10px; }
.service p { color: var(--muted); font-size: 0.95rem; }
.service .num {
  position: absolute; right: 22px; top: 18px; font-size: 2.4rem; font-weight: 800;
  color: transparent; -webkit-text-stroke: 1px var(--line); letter-spacing: -0.04em;
}

/* ---------- 方法论 ---------- */
.process { background: var(--surface); border-block: 1px solid var(--line); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 34px; counter-reset: step; }
.step { position: relative; padding-top: 30px; }
.step::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: var(--line); border-radius: 2px;
}
.step::after {
  content: ""; position: absolute; top: -1px; left: 0; width: 44px; height: 4px; border-radius: 4px; background: var(--brand);
}
.step .tag { font-size: var(--fs-small); font-weight: 700; color: var(--brand); letter-spacing: 0.12em; }
.step h3 { font-size: 1.2rem; font-weight: 700; margin: 10px 0 8px; }
.step p { color: var(--muted); font-size: 0.94rem; }

/* ---------- 案例 ---------- */
.cases-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 22px; }
.case {
  border-radius: var(--r-lg); overflow: hidden; background: var(--surface); border: 1px solid var(--line);
  display: flex; flex-direction: column; transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.case:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.case-media { overflow: hidden; }
.case-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease); }
.case:hover .case-media img { transform: scale(1.05); }
.case-body { padding: 26px 28px 30px; }
.case-body .cat { font-size: var(--fs-small); font-weight: 600; color: var(--brand); letter-spacing: 0.08em; }
.case-body h3 { font-size: 1.25rem; font-weight: 700; margin: 8px 0 8px; }
.case-body p { color: var(--muted); font-size: 0.95rem; margin-bottom: 18px; }
.case-facts { display: flex; gap: 26px; border-top: 1px dashed var(--line); padding-top: 16px; }
.case-facts b { display: block; font-size: 1.3rem; font-weight: 700; color: var(--ink); letter-spacing: -0.02em; }
.case-facts span { font-size: 0.78rem; color: var(--muted); }
.case-1 { grid-column: span 7; } .case-1 .case-media { aspect-ratio: 16/9; }
.case-2 { grid-column: span 5; } .case-2 .case-media { aspect-ratio: 4/3.4; }
.case-3 { grid-column: span 12; }
.case-3 { flex-direction: row; align-items: stretch; }
.case-3 .case-media { width: 42%; aspect-ratio: auto; min-height: 260px; }
.case-3 .case-body { flex: 1; display: flex; flex-direction: column; justify-content: center; }

/* ---------- 口碑 ---------- */
.quotes-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.quote {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 32px 30px; display: flex; flex-direction: column; gap: 20px;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.quote:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.quote .mark { color: var(--brand); font-size: 2.6rem; line-height: 0.6; font-family: Georgia, serif; }
.quote blockquote { font-size: 1.02rem; color: var(--ink-2); flex: 1; }
.quote .who { display: flex; align-items: center; gap: 12px; }
.avatar {
  width: 42px; height: 42px; border-radius: 50%; flex: none;
  display: grid; place-items: center; font-weight: 700; color: #fff; font-size: 0.95rem;
}
.quote .who b { display: block; font-size: 0.92rem; }
.quote .who span { font-size: var(--fs-small); color: var(--muted); }

/* ---------- 关于 ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-media { position: relative; }
.about-media img { border-radius: var(--r-lg); box-shadow: var(--shadow-lg); aspect-ratio: 4/3; object-fit: cover; width: 100%; }
.about-media::after {
  content: ""; position: absolute; inset: auto -18px -18px auto; width: 130px; height: 130px;
  border-radius: var(--r-md); background: var(--brand); opacity: 0.12; z-index: -1;
}
.about-copy .lead { font-size: 1.08rem; color: var(--ink-2); margin: 16px 0 20px; }
.about-copy .more { color: var(--muted); font-size: 0.97rem; margin-bottom: 28px; }
.about-list { display: grid; gap: 12px; margin-bottom: 34px; }
.about-list li { display: flex; gap: 12px; align-items: flex-start; font-size: 0.97rem; color: var(--ink-2); }
.about-list svg { width: 20px; height: 20px; color: var(--brand); flex: none; margin-top: 3px; }

/* ---------- 三大核心服务 ---------- */
.core-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.core-card {
  position: relative; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 36px 32px 32px; display: flex; flex-direction: column;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.3s;
}
.core-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: #f0cfc8; }
.core-card .badge {
  position: absolute; top: 22px; right: 22px;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em;
  color: var(--brand); background: var(--brand-soft); border-radius: 999px; padding: 5px 11px;
}
.core-card .service-icon { margin-bottom: 20px; }
.core-card h3 { font-size: 1.35rem; font-weight: 700; letter-spacing: -0.01em; }
.core-card .sub { color: var(--brand); font-size: 0.9rem; font-weight: 600; margin: 6px 0 18px; }
.bullets { display: grid; gap: 11px; margin-bottom: 24px; }
.bullets li {
  position: relative; padding-left: 20px; font-size: 0.93rem; color: var(--ink-2); line-height: 1.65;
}
.bullets li::before {
  content: ""; position: absolute; left: 2px; top: 8px; width: 6px; height: 6px;
  border-radius: 50%; background: var(--brand); opacity: 0.55;
}
.link-more {
  margin-top: auto; font-size: 0.9rem; font-weight: 600; color: var(--brand);
  display: inline-flex; align-items: center; transition: gap 0.25s var(--ease);
}
.link-more:hover { gap: 4px; text-decoration: underline; text-underline-offset: 4px; }

/* ---------- 应用场景 ---------- */.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.scenario {
  background: var(--bg); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 28px 26px; transition: background 0.3s, transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.process .scenario { background: var(--surface); }
.scenario:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); background: var(--surface); }
.scenario-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 14px; }
.scenario .tag {
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em; color: var(--brand);
  background: var(--brand-soft); border-radius: 999px; padding: 4px 10px;
}
.scenario .out { font-size: 0.75rem; color: var(--muted); letter-spacing: 0.04em; }
.scenario h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.scenario p { color: var(--muted); font-size: 0.92rem; margin-bottom: 14px; }
.mini-list { display: grid; gap: 6px; border-top: 1px dashed var(--line); padding-top: 13px; }
.mini-list li { font-size: 0.85rem; color: var(--ink-2); position: relative; padding-left: 15px; }
.mini-list li::before {
  content: ""; position: absolute; left: 0; top: 8px; width: 5px; height: 5px;
  border-radius: 50%; background: var(--brand); opacity: 0.5;
}

/* ---------- 价格方案 ---------- */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: stretch; }
.price {
  position: relative; background: var(--bg); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 34px 30px; display: flex; flex-direction: column;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}
.process .price { background: var(--surface); }
.price:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.price h3 { font-size: 1.2rem; font-weight: 700; }
.price-sub { color: var(--muted); font-size: 0.86rem; margin-top: 4px; }
.amount { display: flex; align-items: baseline; gap: 6px; margin: 20px 0 22px; }
.amount span { font-size: 2.6rem; font-weight: 700; letter-spacing: -0.03em; line-height: 1; }
.amount i { font-style: normal; font-size: 0.9rem; color: var(--muted); }
.price-list { display: grid; gap: 11px; margin-bottom: 28px; font-size: 0.9rem; color: var(--ink-2); }
.price-list li { position: relative; padding-left: 21px; }
.price-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0; color: var(--brand); font-weight: 700; font-size: 0.85rem;
}
.price .btn { margin-top: auto; justify-content: center; width: 100%; }
.price.featured {
  border-color: var(--brand); background: #fff; box-shadow: 0 18px 50px -22px rgba(232, 84, 63, 0.45);
  transform: translateY(-8px);
}
.price.featured:hover { transform: translateY(-13px); }
.price-flag {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--brand); color: #fff; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.08em;
  padding: 5px 14px; border-radius: 999px; white-space: nowrap;
}
.price-note { text-align: center; color: var(--muted); font-size: 0.85rem; margin-top: 26px; }

/* 单一价格卡 + 费用说明 */
.price-contact { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6.5fr); gap: 56px; align-items: stretch; }
.price-contact .amount span { font-size: 3.2rem; }
.price-contact .contact-info h2 { margin-top: 22px; }

/* ---------- 双 100% 承诺 ---------- */
.promise-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.promise-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 40px 38px 34px; position: relative; overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), border-color 0.3s;
}
.promise-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: #f0cfc8; }
.promise-top { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
.num100 {
  font-size: 3.2rem; font-weight: 800; letter-spacing: -0.05em; line-height: 1;
  color: var(--brand);
}
.num100 i { font-style: normal; font-size: 0.45em; margin-left: 2px; letter-spacing: 0; }
.promise-tag {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.1em; color: var(--brand);
  background: var(--brand-soft); border-radius: 999px; padding: 6px 14px;
}
.promise-card h3 { font-size: 1.3rem; font-weight: 700; letter-spacing: -0.01em; margin-bottom: 10px; }
.promise-card > p { color: var(--muted); font-size: 0.95rem; margin-bottom: 20px; }
.promise-card .bullets { margin-bottom: 0; }
.promise-card .bullets li { font-size: 0.9rem; }

/* ---------- CTA 横幅 ---------- */
.cta-band { padding: 0 0 104px; }
.cta-inner {
  position: relative; overflow: hidden; border-radius: var(--r-lg);
  background: linear-gradient(120deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: #fff; padding: 64px 56px; display: flex; align-items: center; justify-content: space-between; gap: 40px;
}
.cta-inner::before {
  content: ""; position: absolute; right: -90px; top: -110px; width: 320px; height: 320px;
  border-radius: 50%; border: 44px solid rgba(255, 255, 255, 0.12);
}
.cta-inner h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); font-weight: 700; letter-spacing: -0.02em; }
.cta-inner p { opacity: 0.85; margin-top: 8px; }

/* ---------- 联系表单 ---------- */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; align-items: start; }
.contact-info h2 { font-size: var(--fs-h2); font-weight: 700; letter-spacing: -0.02em; margin: 14px 0 14px; }
.contact-info > p { color: var(--muted); margin: 32px 0 34px; }
.contact-item { display: flex; gap: 16px; padding: 18px 0; border-top: 1px solid var(--line); }
.contact-item .service-icon { width: 44px; height: 44px; border-radius: 12px; margin: 0; }
.contact-item .service-icon svg { width: 21px; height: 21px; }
.contact-item b { display: block; font-size: 0.95rem; }
.contact-item span { font-size: 0.92rem; color: var(--muted); }

.form-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 38px; box-shadow: var(--shadow-sm);
  max-width: 720px; margin-inline: auto;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: var(--fs-small); font-weight: 600; margin-bottom: 7px; }
.field label i { font-style: normal; color: var(--brand); }
.field input, .field textarea, .field select {
  width: 100%; padding: 13px 16px; border: 1px solid var(--line); border-radius: var(--r-sm);
  font-family: inherit; font-size: 0.95rem; color: var(--ink); background: var(--bg);
  transition: border-color 0.2s, box-shadow 0.2s, background 0.2s;
}
.field select {
  appearance: none; -webkit-appearance: none; cursor: pointer; padding-right: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%23857c74' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center;
}
.field textarea { resize: vertical; min-height: 110px; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--brand); background: #fff;
  box-shadow: 0 0 0 4px rgba(232, 84, 63, 0.12);
}
.field.err input, .field.err textarea, .field.err select { border-color: var(--brand); }
.field .tip { display: none; font-size: 0.78rem; color: var(--brand-dark); margin-top: 5px; }
.field.err .tip { display: block; }
.form-card .btn { width: 100%; justify-content: center; padding-block: 15px; }
.form-note { font-size: 0.8rem; color: var(--muted); text-align: center; margin-top: 14px; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 30px; transform: translate(-50%, 80px);
  background: var(--ink); color: #fff; padding: 13px 22px; border-radius: 999px;
  font-size: 0.92rem; box-shadow: var(--shadow-lg); opacity: 0; z-index: 200;
  transition: transform 0.4s var(--ease), opacity 0.4s; pointer-events: none;
}
.toast.show { transform: translate(-50%, 0); opacity: 1; }
.toast b { color: #7ddba6; margin-right: 6px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--surface); border-top: 1px solid var(--line); padding: 64px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
.footer .about-txt { color: var(--muted); font-size: 0.92rem; margin-top: 14px; max-width: 26em; }
.footer h4 { font-size: 0.9rem; font-weight: 700; margin-bottom: 16px; }
.footer ul li { margin-bottom: 10px; }
.footer ul a { color: var(--muted); font-size: 0.92rem; transition: color 0.2s; }
.footer ul a:hover { color: var(--brand); }
.footer-bottom {
  border-top: 1px solid var(--line); padding-top: 24px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-size: var(--fs-small); color: var(--muted);
}

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed; right: 26px; bottom: 26px; width: 46px; height: 46px; border-radius: 50%;
  background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-md);
  display: grid; place-items: center; z-index: 90; opacity: 0; transform: translateY(14px);
  transition: opacity 0.3s, transform 0.3s var(--ease), background 0.2s;
}
.to-top.show { opacity: 1; transform: none; }
.to-top:hover { background: var(--brand); border-color: var(--brand); color: #fff; }
.to-top svg { width: 20px; height: 20px; }

/* ---------- 备案号 ---------- */
.beian-bar {
  padding: 22px 24px 26px;
  text-align: center;
  background: var(--bg);
}
.beian-bar a {
  font-size: 0.82rem;
  color: var(--muted);
  letter-spacing: 0.01em;
  transition: color 0.2s;
}
.beian-bar a:hover { color: var(--brand); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .nav { gap: 18px; }
  .hero-grid { gap: 44px; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .core-grid { grid-template-columns: 1fr; }
  .promise-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .price-grid { grid-template-columns: 1fr; max-width: 560px; margin-inline: auto; }
  .price-contact { grid-template-columns: 1fr; max-width: 560px; margin-inline: auto; gap: 40px; }
  .price.featured, .price.featured:hover { transform: none; }
  .process-grid { grid-template-columns: repeat(2, 1fr); gap: 40px 30px; }
  .quotes-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .case-1 { grid-column: span 12; }
  .case-2 { grid-column: span 12; }
  .case-3 { flex-direction: column; }
  .case-3 .case-media { width: 100%; aspect-ratio: 16/8; }
}

@media (max-width: 820px) {
  .nav {
    position: fixed; top: var(--header-h); left: 0; right: 0; z-index: 99;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 10px 24px 22px; transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: transform 0.3s var(--ease), opacity 0.3s;
  }
  body.menu-open .nav { transform: none; opacity: 1; pointer-events: auto; }
  .nav a { padding: 14px 4px; font-size: 1.05rem; border-bottom: 1px solid var(--line); }
  .nav a::after { display: none; }
  .nav-toggle { display: block; }
  .header-cta .btn { display: none; }

  .hero { padding-top: calc(var(--header-h) + 44px); }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 560px; }
  .float-card.fc-1 { left: -8px; }
  .float-card.fc-2 { right: -8px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 22px 22px 30px; }
  .stat b { font-size: 1.8rem; }
  .stat span { font-size: 0.85rem; }
  .stats { margin-top: 0; }
  .services-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .core-card { padding: 30px 26px 28px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .cta-inner { flex-direction: column; align-items: flex-start; padding: 44px 32px; }
  .section { padding: 76px 0; }
}

@media (max-width: 560px) {
  .form-row { grid-template-columns: 1fr; }
  .hero-meta { gap: 22px; flex-wrap: wrap; }
  .hero-actions .btn { flex: 1; justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat { padding: 26px 20px; }
  .stat b { font-size: 1.5rem; letter-spacing: -0.04em; }
  .stat b i { font-size: 0.5em; }
  .stat span { font-size: 0.78rem; }
}