/* =========================================================
   新和科技 · 企业官网  —  设计系统
   风格：简约大气 · 科技感
   配色：深海军蓝 + 蓝青渐变 + 浅色内容区
   ========================================================= */

:root {
  /* 品牌色 */
  --navy: #0a1a3a;
  --navy-2: #0f264f;
  --blue: #2563eb;
  --blue-2: #1d4ed8;
  --cyan: #06b6d4;
  --cyan-2: #22d3ee;

  /* 中性色 */
  --ink: #0f172a;
  --ink-2: #1e293b;
  --muted: #64748b;
  --muted-2: #94a3b8;
  --line: #e6ecf5;
  --bg: #ffffff;
  --bg-soft: #f6f9fe;
  --bg-soft-2: #eef3fb;

  /* 渐变 */
  --grad-brand: linear-gradient(135deg, #0a1a3a 0%, #1e3a8a 45%, #2563eb 100%);
  --grad-cyan: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
  --grad-text: linear-gradient(120deg, #38bdf8, #2563eb);

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06), 0 4px 12px rgba(15, 23, 42, .05);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, .08), 0 2px 6px rgba(15, 23, 42, .05);
  --shadow-lg: 0 24px 60px rgba(15, 23, 42, .14);

  /* 圆角 */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;

  --maxw: 1200px;
  --nav-h: 72px;

  --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans CN", system-ui, sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Roboto Mono", Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-cn);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  font-size: 16px;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 文字工具 ---------- */
.mono { font-family: var(--font-mono); letter-spacing: -0.02em; }
.text-grad {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 2px;
  background: var(--grad-cyan);
  border-radius: 2px;
}
.section-title {
  font-size: clamp(26px, 3.4vw, 40px);
  font-weight: 800;
  letter-spacing: -.01em;
  line-height: 1.25;
  color: var(--ink);
}
.section-sub {
  margin-top: 14px;
  color: var(--muted);
  font-size: 17px;
  max-width: 720px;
}

/* =========================================================
   导航
   ========================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s ease, background .3s ease;
}
.nav.scrolled { box-shadow: var(--shadow-sm); }
.nav .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 19px;
  letter-spacing: .02em;
  color: var(--navy);
}
.brand .logo {
  width: 38px; height: 38px;
  border-radius: 11px;
  background: var(--grad-brand);
  display: grid;
  place-items: center;
  box-shadow: 0 6px 16px rgba(37, 99, 235, .35);
  position: relative;
  overflow: hidden;
}
.brand .logo.logo-img,
.footer .brand .logo {
  width: 44px; height: 44px;
  background: transparent;
  box-shadow: none;
  border-radius: 10px;
  overflow: visible;
}
.brand .logo img,
.footer .brand .logo img {
  width: 100%; height: 100%;
  object-fit: contain;
  display: block;
}
.brand .logo svg { width: 22px; height: 22px; }
.brand .logo::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(34,211,238,.6), transparent 60%);
}
.brand .logo.logo-img::after,
.footer .brand .logo::after { display: none; }

.brand > span:last-child { display: flex; flex-direction: column; line-height: 1.2; }
.brand small {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--muted-2);
  text-transform: uppercase;
  margin-top: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  position: relative;
  padding: 9px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-2);
  border-radius: 999px;
  transition: color .2s, background .2s;
}
.nav-links a:hover { color: var(--blue); background: var(--bg-soft); }
.nav-links a.active { color: #fff; background: var(--grad-cyan); box-shadow: 0 6px 16px rgba(37,99,235,.3); }

.nav-cta {
  margin-left: 8px;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--navy);
  color: #fff !important;
  font-weight: 600;
  font-size: 14px;
  transition: transform .2s, box-shadow .2s;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  position: relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 18px; height: 2px;
  background: var(--ink);
  transform: translate(-50%, -50%);
  transition: .25s;
}
.nav-toggle span::before { transform: translate(-50%, -7px); }
.nav-toggle span::after { transform: translate(-50%, 7px); }
.nav.open .nav-toggle span { background: transparent; }
.nav.open .nav-toggle span::before { transform: translate(-50%, 0) rotate(45deg); }
.nav.open .nav-toggle span::after { transform: translate(-50%, 0) rotate(-45deg); }

/* =========================================================
   英雄区（深色科技感）
   ========================================================= */
.hero {
  position: relative;
  background: var(--grad-brand);
  color: #fff;
  padding: 96px 0 120px;
  overflow: hidden;
}
.hero::before {
  /* 网格背景 */
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 75%);
}
.hero::after {
  /* 光晕 */
  content: "";
  position: absolute;
  width: 620px; height: 620px;
  right: -160px; top: -220px;
  background: radial-gradient(circle, rgba(34,211,238,.35), transparent 65%);
  filter: blur(20px);
  pointer-events: none;
}
.hero .container { position: relative; z-index: 2; }
.hero .badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 999px;
  background: rgba(255,255,255,.07);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .04em;
  margin-bottom: 26px;
  backdrop-filter: blur(6px);
}
.hero .badge .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--cyan-2);
  box-shadow: 0 0 0 4px rgba(34,211,238,.25);
  animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.4} }

.hero h1 {
  font-size: clamp(34px, 5.2vw, 60px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -.01em;
  max-width: 880px;
}
.hero h1 .text-grad { color: transparent; white-space: nowrap; }
.hero p.lead {
  margin-top: 22px;
  font-size: clamp(16px, 1.6vw, 19px);
  color: rgba(255,255,255,.82);
  max-width: 640px;
}
.hero-actions {
  margin-top: 38px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform .2s, box-shadow .2s, background .2s;
}
.btn-primary {
  background: #fff;
  color: var(--navy);
  box-shadow: 0 10px 30px rgba(0,0,0,.25);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(0,0,0,.3); }
.btn-ghost {
  background: rgba(255,255,255,.08);
  color: #fff;
  border-color: rgba(255,255,255,.25);
}
.btn-ghost:hover { background: rgba(255,255,255,.16); transform: translateY(-2px); }
.btn .arrow { transition: transform .2s; }
.btn:hover .arrow { transform: translateX(4px); }

/* 英雄区统计条 */
.hero-stats {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  border-top: 1px solid rgba(255,255,255,.14);
  padding-top: 34px;
}
.hero-stats .stat .num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 700;
  color: #fff;
  line-height: 1;
}
.hero-stats .stat .num .unit { font-size: .5em; color: var(--cyan-2); margin-left: 4px; }
.hero-stats .stat .label { margin-top: 8px; font-size: 14px; color: rgba(255,255,255,.7); }

/* =========================================================
   通用区块
   ========================================================= */
.section { padding: 96px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { max-width: 760px; margin-bottom: 52px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }

/* 卡片 */
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 32px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }

.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

/* 产品方案矩阵（紧凑） */
.matrix { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.matrix.focus { grid-template-columns: minmax(0, 420px); justify-content: flex-start; gap: 0; }
.matrix.focus .matrix-item {
  position: relative; overflow: hidden; padding-top: 44px;
  border: 2px solid var(--blue); box-shadow: var(--shadow-md);
}
.matrix.focus .matrix-item::before {
  content: "核心推荐";
  position: absolute; top: 0; left: 0;
  background: var(--grad-cyan); color: #fff;
  font-size: 12px; font-weight: 700; padding: 6px 14px;
  border-radius: 0 0 var(--r-md) 0;
}

/* 弹性换行矩阵（用于卡片数量不能整除 4 的场景） */
.matrix-wrap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: flex-start; }
.matrix-wrap .matrix-item { flex: 0 0 calc(25% - 12px); min-width: 220px; max-width: 280px; }
@media (max-width: 1024px) { .matrix-wrap .matrix-item { flex: 0 0 calc(33.333% - 11px); } }
@media (max-width: 640px)  { .matrix-wrap .matrix-item { flex: 1 1 100%; max-width: 100%; } }

.matrix-item {
  display: flex; gap: 14px; align-items: center;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.matrix-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.matrix-item .m-ico {
  width: 44px; height: 44px; flex-shrink: 0;
  border-radius: 12px;
  background: var(--bg-soft-2);
  color: var(--blue);
  display: grid; place-items: center;
}
.matrix-item .m-ico svg { width: 24px; height: 24px; }
.matrix-item h4 { font-size: 15px; font-weight: 700; color: var(--ink); }
.matrix-item p { font-size: 12.5px; color: var(--muted); margin-top: 2px; line-height: 1.5; }
.matrix-item.core { border-color: var(--blue); box-shadow: var(--shadow-sm); }
.matrix-item.core .m-ico { background: var(--grad-cyan); color: #fff; }

/* 矩阵分类 */
.matrix-block { margin-bottom: 34px; }
.matrix-cat {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 15px; font-weight: 800; color: var(--navy);
  margin: 0 0 16px; letter-spacing: .02em;
}
.matrix-cat::before {
  content: ""; width: 4px; height: 18px; border-radius: 2px;
  background: var(--grad-cyan);
}
.matrix-foot {
  text-align: center; color: var(--muted); font-size: 14px; margin-top: 8px;
}
.matrix-foot a { color: var(--blue); font-weight: 600; }

/* 图标方块 */
.ico {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: grid; place-items: center;
  background: var(--bg-soft-2);
  color: var(--blue);
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
}
.ico.brand { background: var(--grad-cyan); color: #fff; box-shadow: 0 8px 20px rgba(37,99,235,.3); }
.ico svg { width: 26px; height: 26px; }
.card h3 { font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15px; }
.card .more {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 18px; color: var(--blue); font-weight: 600; font-size: 14px;
}

/* 关于摘要 */
.about-split {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}
.about-visual {
  position: relative;
  border-radius: var(--r-xl);
  background: var(--grad-brand);
  padding: 40px;
  color: #fff;
  overflow: hidden;
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.about-visual::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 38px 38px;
  mask-image: radial-gradient(circle at 70% 20%, #000, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 70% 20%, #000, transparent 70%);
}
.about-visual .v-label { position: relative; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--cyan-2); font-weight: 600; }
.about-visual .v-big { position: relative; font-family: var(--font-mono); font-size: clamp(40px,6vw,68px); font-weight: 800; line-height: 1.05; }
.about-visual .v-big small { display:block; font-family: var(--font-cn); font-size: 16px; font-weight: 500; color: rgba(255,255,255,.8); margin-top: 10px; letter-spacing: 0; }
.about-visual .v-tags { position: relative; display: flex; flex-wrap: wrap; gap: 10px; }
.about-visual .v-tags span { padding: 7px 14px; border: 1px solid rgba(255,255,255,.25); border-radius: 999px; font-size: 13px; background: rgba(255,255,255,.06); }

.about-copy p { color: var(--muted); margin-bottom: 16px; font-size: 16px; }
.about-copy strong { color: var(--ink); }

/* 公司简介：结构化（坚实底座 / 核心引擎 / 独特价值 / 服务承诺） */
.intro-block { margin-top: 22px; padding: 4px 0 4px 18px; border-left: 3px solid var(--blue); }
.intro-block h3 {
  display: flex; align-items: center; gap: 10px;
  font-size: 17px; font-weight: 800; color: var(--ink); margin-bottom: 8px; letter-spacing: .01em;
}
.intro-block h3 .ib-icon {
  width: 28px; height: 28px; flex-shrink: 0;
  border-radius: 7px;
  background: var(--grad-cyan);
  color: #fff;
  display: grid; place-items: center;
}
.intro-block h3 .ib-icon svg { width: 15px; height: 15px; }
.intro-block p { margin: 0; color: var(--ink-2); font-size: 15px; line-height: 1.9; }

/* 为什么选择我们 */
.feat {
  display: flex;
  gap: 18px;
  padding: 26px;
  border-radius: var(--r-md);
  background: #fff;
  border: 1px solid var(--line);
  transition: .25s;
}
.feat:hover { box-shadow: var(--shadow-md); border-color: transparent; transform: translateY(-4px); }
.feat .ico { margin-bottom: 0; flex-shrink: 0; }
.feat h4 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.feat p { font-size: 14px; color: var(--muted); }

/* 业务覆盖（深色条） */
.biz {
  position: relative;
  background: var(--navy);
  color: #fff;
  border-radius: var(--r-xl);
  padding: 14px;
  overflow: hidden;
}
.biz::before {
  content:""; position:absolute; inset:0;
  background: radial-gradient(circle at 85% 0%, rgba(34,211,238,.22), transparent 55%);
}
.biz-inner { position: relative; padding: 40px; }
.biz .biz-item {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 20px 18px;
  border-radius: var(--r-md);
  transition: background .2s;
}
.biz .biz-item:hover { background: rgba(255,255,255,.06); }
.biz .biz-item .b-ico {
  width: 44px; height: 44px; flex-shrink: 0;
  border-radius: 12px;
  background: var(--grad-cyan);
  display: grid; place-items: center;
  box-shadow: 0 6px 16px rgba(34,211,238,.3);
}
.biz .biz-item h4 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.biz .biz-item p { font-size: 13px; color: rgba(255,255,255,.65); }

/* CTA 横幅 */
.cta-banner {
  position: relative;
  background: var(--grad-brand);
  border-radius: var(--r-xl);
  padding: 56px 48px;
  color: #fff;
  overflow: hidden;
  text-align: center;
}
.cta-banner::before {
  content:""; position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(circle at 50% 0%, #000, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 50% 0%, #000, transparent 70%);
}
.cta-banner h2 { position: relative; font-size: clamp(26px,3.4vw,38px); font-weight: 800; }
.cta-banner p { position: relative; margin: 14px auto 30px; color: rgba(255,255,255,.82); max-width: 560px; }
.cta-banner .hero-actions { position: relative; justify-content: center; }
.cta-banner .cta-phone { position: relative; margin: 22px auto 0; font-size: 15px; color: rgba(255,255,255,.92); }
.cta-banner .cta-phone a { color: var(--cyan-2); font-weight: 700; }

/* 流程步骤 */
.steps { counter-reset: step; }
.step {
  position: relative;
  padding: 28px 28px 28px 84px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 24px; top: 28px;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--grad-cyan);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  display: grid; place-items: center;
  box-shadow: 0 8px 18px rgba(37,99,235,.3);
}
.step h4 { font-size: 18px; font-weight: 700; margin-bottom: 6px; }
.step p { color: var(--muted); font-size: 14px; }
.step .tag {
  display: inline-block; margin-top: 10px;
  font-size: 12px; font-weight: 600;
  color: var(--blue); background: var(--bg-soft-2);
  padding: 4px 10px; border-radius: 999px;
}

/* 购买指南卡片 */
.buy-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 30px;
  position: relative;
  overflow: hidden;
}
.buy-card.featured { border-color: var(--blue); box-shadow: var(--shadow-md); }
.buy-card.featured::before {
  content:"推荐"; position:absolute; top:18px; right:-34px;
  transform: rotate(45deg);
  background: var(--grad-cyan); color:#fff;
  font-size:12px; font-weight:700; padding:5px 40px;
}
.buy-card .tier { font-size: 13px; font-weight:600; color: var(--blue); letter-spacing:.1em; text-transform:uppercase; }
.buy-card h3 { font-size: 22px; font-weight:800; margin:6px 0 14px; }
.buy-card ul { margin: 16px 0; }
.buy-card li { display:flex; gap:10px; align-items:flex-start; padding:8px 0; font-size:14px; color: var(--ink-2); border-bottom:1px dashed var(--line); }
.buy-card li:last-child { border-bottom: none; }
.buy-card li svg { width:18px; height:18px; color: var(--cyan); flex-shrink:0; margin-top:3px; }
.buy-note { font-size:13px; color: var(--muted); margin-top: 10px; }
.buy-card h3 .unit { font-size: .5em; font-weight: 700; color: var(--muted); margin-left: 4px; }
.buy-credit { display:inline-block; margin: 2px 0 12px; font-size: 13px; font-weight: 600; color: var(--cyan); background: var(--bg-soft); padding: 6px 12px; border-radius: 999px; }
.buy-sub { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.btn-brand { background: var(--grad-cyan); color: #fff; box-shadow: 0 10px 24px rgba(37,99,235,.32); }
.btn-brand:hover { transform: translateY(-2px); box-shadow: 0 16px 34px rgba(37,99,235,.4); }

/* 购买流程：二维码 + 步骤 */
.buy-steps-split {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 40px;
  align-items: start;
}
.qr-card {
  position: sticky; top: 100px;
  background: #fff;
  border: 1px dashed var(--blue);
  border-radius: var(--r-lg);
  padding: 28px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.qr-wrap {
  background: #fff;
  border-radius: var(--r-md);
  padding: 8px;
  margin-bottom: 16px;
}
.qr-wrap img { width: 100%; max-width: 220px; margin: 0 auto; display: block; border-radius: 0; }
.qr-card h4 { font-size: 17px; font-weight: 700; color: var(--blue); margin-bottom: 4px; }
.qr-card p { font-size: 13px; color: var(--muted); }
.steps-list { display: grid; gap: 16px; }
.step-row {
  display: flex; gap: 18px; align-items: flex-start;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 22px;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.step-row:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: transparent; }
.step-row .step-num {
  width: 36px; height: 36px; flex-shrink: 0;
  border-radius: 10px;
  background: var(--grad-cyan);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  display: grid; place-items: center;
  box-shadow: 0 6px 14px rgba(37,99,235,.25);
}
.step-row h4 { font-size: 17px; font-weight: 700; margin-bottom: 4px; }
.step-row p { font-size: 14px; color: var(--muted); }
.step-row .tag {
  display: inline-block; margin-top: 6px;
  font-size: 12px; font-weight: 600;
  color: var(--blue); background: var(--bg-soft-2);
  padding: 3px 10px; border-radius: 999px;
}

/* FAQ */
.faq { border:1px solid var(--line); border-radius: var(--r-md); overflow:hidden; }
.faq details { border-bottom:1px solid var(--line); }
.faq details:last-child { border-bottom:none; }
.faq summary {
  cursor:pointer; padding:20px 24px; font-weight:600; font-size:16px;
  list-style:none; display:flex; justify-content:space-between; align-items:center;
}
.faq summary::-webkit-details-marker { display:none; }
.faq summary::after { content:"+"; font-size:22px; color: var(--blue); font-weight:400; transition:.2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .ans { padding: 0 24px 22px; color: var(--muted); font-size:15px; }

/* 联系表单 */
.contact-grid { display:grid; grid-template-columns: 1fr 1.1fr; gap:48px; }
.info-item { display:flex; gap:16px; padding:20px 0; border-bottom:1px solid var(--line); }
.info-item:last-child { border-bottom:none; }
.info-item .ico { margin-bottom:0; }
.info-item h4 { font-size:15px; font-weight:700; }
.info-item p { color: var(--muted); font-size:14px; }

.form { background:#fff; border:1px solid var(--line); border-radius: var(--r-lg); padding:34px; box-shadow: var(--shadow-sm); }
.field { margin-bottom:18px; }
.field label { display:block; font-size:14px; font-weight:600; margin-bottom:8px; }
.field input, .field textarea, .field select {
  width:100%; padding:12px 14px; font-size:15px; font-family:inherit;
  border:1px solid var(--line); border-radius: var(--r-sm); background: var(--bg-soft);
  transition: border .2s, box-shadow .2s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline:none; border-color: var(--blue); background:#fff;
  box-shadow: 0 0 0 4px rgba(37,99,235,.12);
}
.field textarea { resize: vertical; min-height: 110px; }

/* 地图/二维码占位 */
.map {
  margin-top: 24px;
  border-radius: var(--r-lg);
  background:
    linear-gradient(rgba(37,99,235,.06), rgba(37,99,235,.06)),
    repeating-linear-gradient(0deg, var(--line) 0 1px, transparent 1px 28px),
    repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 28px);
  height: 240px; position: relative; overflow:hidden;
  border:1px solid var(--line);
}
.map .pin {
  position:absolute; left:50%; top:46%; transform:translate(-50%,-50%);
  width:18px; height:18px; border-radius:50%; background: var(--blue);
  box-shadow: 0 0 0 8px rgba(37,99,235,.18);
}
.map .map-label {
  position:absolute; left:16px; bottom:14px;
  background:#fff; padding:8px 14px; border-radius:999px;
  font-size:13px; font-weight:600; box-shadow: var(--shadow-sm);
}
.qr {
  width:130px; height:130px; border-radius: var(--r-md);
  background:
    repeating-linear-gradient(45deg, var(--ink) 0 6px, transparent 6px 12px);
  border:1px solid var(--line);
  display:grid; place-items:center;
  position:relative;
}
.qr span {
  background:#fff; padding:4px 8px; font-size:11px; color:var(--muted);
  border-radius:6px;
}

/* =========================================================
   页脚
   ========================================================= */
.footer {
  background: var(--navy);
  color: rgba(255,255,255,.72);
  padding: 64px 0 28px;
}
.footer .f-top {
  display:grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.footer .brand { color:#fff; margin-bottom: 16px; }
.footer .f-about { font-size: 14px; max-width: 320px; line-height:1.8; }
.footer h5 { color:#fff; font-size:15px; font-weight:700; margin-bottom:16px; }
.footer .f-links a { display:block; font-size:14px; padding:6px 0; color: rgba(255,255,255,.7); transition:.2s; }
.footer .f-links a:hover { color: var(--cyan-2); padding-left: 4px; }
.footer .f-tel { font-size: 13px; color: var(--cyan-2); padding-top: 6px; font-weight: 600; }
.footer .f-bottom {
  padding-top: 22px;
  display:flex; justify-content:space-between; align-items:center;
  font-size:13px; color: rgba(255,255,255,.55); flex-wrap:wrap; gap:10px;
}

/* 滚动揭示动画 */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* 回到顶部 */
.to-top {
  position: fixed;
  right: 28px; bottom: 32px;
  width: 48px; height: 48px;
  border: none;
  border-radius: 14px;
  background: var(--grad-cyan);
  color: #fff;
  cursor: pointer;
  display: grid; place-items: center;
  box-shadow: 0 10px 26px rgba(37,99,235,.34);
  opacity: 0; visibility: hidden;
  transform: translateY(12px);
  transition: opacity .3s ease, transform .3s ease, visibility .3s, box-shadow .2s;
  z-index: 90;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { transform: translateY(-3px); box-shadow: 0 16px 34px rgba(37,99,235,.45); }
.to-top svg { width: 22px; height: 22px; }
@media (max-width: 760px) {
  .to-top { right: 16px; bottom: 20px; width: 44px; height: 44px; }
  .to-top svg { width: 20px; height: 20px; }
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .matrix { grid-template-columns: repeat(2, 1fr); }
  .about-split { grid-template-columns: 1fr; gap: 32px; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .buy-steps-split { grid-template-columns: 1fr; }
  .qr-card { position: static; max-width: 320px; margin: 0 auto 32px; }
  .footer .f-top { grid-template-columns: 1fr 1fr; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); row-gap: 28px; }
}
@media (max-width: 760px) {
  .nav-links {
    position: absolute;
    top: var(--nav-h); left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    border-bottom: 1px solid var(--line);
    padding: 16px;
    gap: 6px;
    display: none;
    box-shadow: var(--shadow-md);
  }
  .nav.open .nav-links { display: flex; }
  .nav-links a { padding: 12px 16px; }
  .nav-cta { margin: 6px 0 0; text-align:center; }
  .nav-toggle { display: block; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .matrix { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .hero { padding: 64px 0 80px; }
  .cta-banner { padding: 40px 24px; }
  .footer .f-top { grid-template-columns: 1fr; gap: 28px; }
  .footer .f-bottom { flex-direction: column; align-items: flex-start; }
}