/* ============================================================
   见微科技 · 小程序建设公司官网
   全局样式表 — 本地化部署（无外部引用）
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  --navy-950: #081426;
  --navy-900: #0A1B2E;
  --navy-800: #10263F;
  --navy-700: #16334F;
  --ink: #14233A;
  --body: #46566C;
  --muted: #7A8AA0;
  --line: #E4E9F0;
  --bg: #FFFFFF;
  --bg-soft: #F3F6FB;
  --primary: #1E5EFF;
  --primary-dark: #1748C8;
  --accent: #00B8A9;
  --grad: linear-gradient(120deg, #1E5EFF 0%, #00B8A9 100%);
  --grad-soft: linear-gradient(120deg, rgba(30,94,255,.08), rgba(0,184,169,.08));
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(16,35,63,.06), 0 4px 14px rgba(16,35,63,.06);
  --shadow-md: 0 8px 30px rgba(16,35,63,.10);
  --shadow-lg: 0 20px 50px rgba(16,35,63,.16);
  --container: 1200px;
  --font: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

/* ---------- 基础 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--body);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
::selection { background: rgba(30,94,255,.16); }

h1, h2, h3, h4 { color: var(--ink); line-height: 1.3; font-weight: 700; }
h1 { font-size: clamp(32px, 4.6vw, 52px); font-weight: 900; letter-spacing: .5px; }
h2 { font-size: clamp(25px, 3.2vw, 36px); font-weight: 700; }
h3 { font-size: 19px; font-weight: 700; }
h4 { font-size: 16px; font-weight: 700; }

.container { width: min(var(--container), 92%); margin: 0 auto; }

.section { padding: 92px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.section-head .eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: 2px; color: var(--primary);
  margin-bottom: 14px;
}
.section-head .eyebrow::before, .section-head .eyebrow::after {
  content: ""; width: 20px; height: 2px; background: var(--grad); border-radius: 2px;
}
.section-head p { margin-top: 14px; font-size: 16px; }

/* 内容可见性动画（JS 增强，无 JS 时内容正常显示） */
html.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
html.js .reveal.in { opacity: 1; transform: none; }
html.js .reveal[data-delay="1"] { transition-delay: .08s; }
html.js .reveal[data-delay="2"] { transition-delay: .16s; }
html.js .reveal[data-delay="3"] { transition-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
  html.js .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px;
  font-size: 15px; font-weight: 700; line-height: 1.2;
  transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease, color .2s ease;
}
.btn svg { width: 16px; height: 16px; flex: none; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 8px 22px rgba(30,94,255,.28); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(30,94,255,.36); }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.45); }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn-light { background: #fff; color: var(--primary); box-shadow: var(--shadow-sm); }
.btn-light:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline { border: 1.5px solid var(--line); color: var(--ink); background: #fff; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- 页头 ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(255,255,255,.92); backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .25s ease, border-color .25s ease;
}
.site-header.scrolled { border-color: var(--line); box-shadow: 0 6px 24px rgba(16,35,63,.08); }
.header-inner { display: flex; align-items: center; gap: 32px; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; flex: none; }
.brand img { width: 42px; height: 42px; }
.brand-text { line-height: 1.15; }
.brand-text strong { display: block; font-size: 20px; font-weight: 900; color: var(--ink); letter-spacing: 1px; }
.brand-text span { font-size: 10px; letter-spacing: 2.6px; color: var(--muted); font-weight: 500; }

.main-nav { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 9px 16px; border-radius: 999px;
  font-size: 15px; font-weight: 500; color: var(--ink);
  transition: color .2s ease, background .2s ease;
}
.main-nav a:hover { color: var(--primary); background: rgba(30,94,255,.06); }
.main-nav a.active { color: var(--primary); background: rgba(30,94,255,.10); font-weight: 700; }
.header-cta { flex: none; }
.header-cta .btn { padding: 10px 22px; font-size: 14px; }

.nav-toggle { display: none; flex: none; width: 44px; height: 44px; border-radius: 10px; align-items: center; justify-content: center; color: var(--ink); }
.nav-toggle svg { width: 24px; height: 24px; }
.nav-toggle .icon-close { display: none; }
body.nav-open .nav-toggle .icon-close { display: block; }
body.nav-open .nav-toggle .icon-menu { display: none; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--navy-900); color: #A9B8CC; }
.footer-main { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.3fr; gap: 48px; padding: 68px 0 48px; }
.footer-brand .brand-text strong { color: #fff; }
.footer-brand .brand-text span { color: #7E93AC; }
.footer-brand p { margin-top: 18px; font-size: 14px; max-width: 300px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 20px; letter-spacing: .5px; }
.footer-col li { margin-bottom: 12px; }
.footer-col a { font-size: 14px; transition: color .2s ease; }
.footer-col a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; font-size: 14px; margin-bottom: 14px; align-items: flex-start; }
.footer-contact svg { width: 16px; height: 16px; flex: none; margin-top: 4px; color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 22px 0; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 13px; color: #6E829B; }

/* ---------- 首屏 Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(30,94,255,.35), transparent 60%),
    radial-gradient(800px 420px at 5% 110%, rgba(0,184,169,.28), transparent 60%),
    linear-gradient(160deg, #0A1B2E 0%, #10263F 60%, #0A1B2E 100%);
  color: #DCE6F2;
  padding: 168px 0 110px;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  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: radial-gradient(ellipse at 70% 20%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 20%, #000 0%, transparent 70%);
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px; border-radius: 999px;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.14);
  font-size: 13px; font-weight: 500; color: #C8D6EA;
}
.hero-badge::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(0,184,169,.18); }
.hero h1 { color: #fff; margin: 22px 0 20px; }
.hero h1 em { font-style: normal; background: linear-gradient(120deg, #5B8CFF, #2FD6C5); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-desc { font-size: 17px; max-width: 540px; color: #B9C8DC; }
.hero-actions { display: flex; gap: 16px; margin-top: 34px; flex-wrap: wrap; }
.hero-points { display: flex; gap: 28px; margin-top: 44px; flex-wrap: wrap; }
.hero-points li { display: flex; align-items: center; gap: 8px; font-size: 14px; color: #B9C8DC; }
.hero-points svg { width: 16px; height: 16px; color: var(--accent); }
.hero-media { position: relative; }
.hero-media .glow { position: absolute; inset: -8%; background: radial-gradient(50% 50% at 50% 50%, rgba(30,94,255,.35), transparent 70%); filter: blur(20px); z-index: 0; }
.hero-media img { position: relative; width: 100%; border-radius: 20px; box-shadow: 0 30px 70px rgba(0,0,0,.45); border: 1px solid rgba(255,255,255,.12); }
.hero-float {
  position: absolute; left: -22px; bottom: -26px; z-index: 2;
  display: flex; align-items: center; gap: 12px;
  background: #fff; color: var(--ink);
  padding: 14px 20px; border-radius: 14px; box-shadow: var(--shadow-lg);
}
.hero-float .f-icon { width: 40px; height: 40px; border-radius: 10px; background: var(--grad-soft); display: flex; align-items: center; justify-content: center; color: var(--primary); }
.hero-float .f-icon svg { width: 20px; height: 20px; }
.hero-float strong { display: block; font-size: 18px; line-height: 1.2; }
.hero-float span { font-size: 12px; color: var(--muted); }

/* ---------- 数据带 ---------- */
.stats-band { position: relative; z-index: 3; margin-top: -62px; }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
  border-radius: 18px; overflow: hidden; box-shadow: var(--shadow-md);
}
.stat { background: #fff; padding: 34px 20px; text-align: center; }
.stat strong { display: block; font-size: 38px; font-weight: 900; color: var(--ink); line-height: 1.15; }
.stat strong i { font-style: normal; color: var(--primary); font-weight: 900; }
.stat span { display: block; margin-top: 6px; font-size: 14px; color: var(--muted); }

/* ---------- 服务卡片 ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px; transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: transparent; }
.service-icon {
  width: 54px; height: 54px; border-radius: 14px;
  background: var(--grad-soft); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
}
.service-icon svg { width: 26px; height: 26px; }
.service-card h3 { margin: 20px 0 10px; }
.service-card p { font-size: 14.5px; margin-bottom: 18px; }
.card-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 700; color: var(--primary); }
.card-link svg { width: 15px; height: 15px; transition: transform .2s ease; }
.card-link:hover svg { transform: translateX(4px); }

/* ---------- 案例卡片 ---------- */
.case-card { padding: 0; overflow: hidden; }
.case-media { position: relative; aspect-ratio: 3 / 2; overflow: hidden; }
.case-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.case-card:hover .case-media img { transform: scale(1.05); }
.case-tag {
  position: absolute; left: 16px; top: 16px;
  background: rgba(8,20,38,.72); color: #fff; backdrop-filter: blur(6px);
  padding: 5px 12px; border-radius: 999px; font-size: 12.5px; font-weight: 500;
}
.case-body { padding: 22px 24px 24px; }
.case-body h3 { font-size: 17px; margin-bottom: 8px; }
.case-body p { font-size: 14px; margin-bottom: 16px; }
.case-metrics { display: flex; gap: 20px; border-top: 1px dashed var(--line); padding-top: 14px; }
.case-metrics div { flex: 1; }
.case-metrics strong { display: block; font-size: 17px; font-weight: 900; color: var(--primary); line-height: 1.3; }
.case-metrics span { font-size: 12px; color: var(--muted); }

/* ---------- 为什么选择 / 图文块 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split-media { position: relative; }
.split-media img { width: 100%; border-radius: 20px; box-shadow: var(--shadow-lg); }
.split-media::before {
  content: ""; position: absolute; inset: -18px -18px auto auto; width: 46%; height: 46%;
  border-radius: 20px; background: var(--grad-soft); z-index: -1;
}
.split h2 { margin-bottom: 18px; }
.split .lead { font-size: 16px; margin-bottom: 30px; }
.feature-list { display: grid; gap: 22px; }
.feature-list li { display: flex; gap: 16px; }
.feature-list .fi {
  flex: none; width: 44px; height: 44px; border-radius: 12px;
  background: var(--grad-soft); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
}
.feature-list .fi svg { width: 21px; height: 21px; }
.feature-list strong { display: block; color: var(--ink); font-size: 15.5px; margin-bottom: 4px; }
.feature-list p { font-size: 14px; }

/* ---------- 步骤条 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step { position: relative; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px; }
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-size: 30px; font-weight: 900; color: transparent;
  -webkit-text-stroke: 1.5px var(--primary);
}
.step h3 { margin: 18px 0 8px; font-size: 16.5px; }
.step p { font-size: 14px; }

/* ---------- 客户评价 ---------- */
.quote-card { position: relative; padding: 34px 30px 30px; }
.quote-card p { font-size: 15px; margin-bottom: 24px; position: relative; }
.quote-from { display: flex; align-items: center; gap: 14px; }
.quote-from .avatar {
  width: 46px; height: 46px; border-radius: 50%; flex: none;
  background: var(--grad); color: #fff; font-weight: 700; font-size: 16px;
  display: flex; align-items: center; justify-content: center;
}
.quote-from strong { display: block; color: var(--ink); font-size: 14.5px; }
.quote-from span { font-size: 12.5px; color: var(--muted); }

/* ---------- CTA 带 ---------- */
.cta-band { position: relative; overflow: hidden; background: linear-gradient(120deg, #0A1B2E, #10263F 55%, #0E2A45); color: #fff; text-align: center; padding: 84px 0; }
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(600px 300px at 50% 0%, rgba(30,94,255,.35), transparent 70%);
}
.cta-band .container { position: relative; }
.cta-band h2 { color: #fff; margin-bottom: 14px; }
.cta-band p { color: #B9C8DC; max-width: 560px; margin: 0 auto 32px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- 页头横幅（内页） ---------- */
.page-hero { background: linear-gradient(160deg, #0A1B2E, #10263F 70%, #0E2A45); color: #DCE6F2; padding: 152px 0 84px; text-align: center; position: relative; overflow: hidden; }
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 0%, transparent 75%);
}
.page-hero .container { position: relative; }
.crumbs { font-size: 13px; color: #7E93AC; margin-bottom: 18px; }
.crumbs a:hover { color: #fff; }
.crumbs span { color: #B9C8DC; }
.page-hero h1 { color: #fff; }
.page-hero p { max-width: 620px; margin: 16px auto 0; color: #B9C8DC; font-size: 16px; }

/* ---------- 服务详情卡片 ---------- */
.service-detail { padding: 36px 34px; }
.service-detail .service-icon { width: 60px; height: 60px; border-radius: 16px; }
.service-detail .service-icon svg { width: 30px; height: 30px; }
.service-detail h3 { font-size: 21px; margin: 22px 0 12px; }
.service-detail > p { font-size: 14.5px; margin-bottom: 20px; }
.service-detail ul { display: grid; gap: 10px; }
.service-detail ul li { display: flex; gap: 10px; font-size: 14px; align-items: flex-start; }
.service-detail ul svg { width: 16px; height: 16px; flex: none; margin-top: 5px; color: var(--accent); }
.service-scene { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; padding-top: 18px; border-top: 1px dashed var(--line); }
.service-scene span { font-size: 12.5px; color: var(--primary); background: rgba(30,94,255,.07); padding: 4px 12px; border-radius: 999px; font-weight: 500; }

/* ---------- 时间轴（发展历程 / 服务流程） ---------- */
.timeline { display: grid; gap: 0; max-width: 860px; margin: 0 auto; }
.tl-row { display: grid; grid-template-columns: 150px 56px 1fr; align-items: stretch; }
.tl-time { text-align: right; padding: 6px 20px 6px 0; font-size: 15px; font-weight: 700; color: var(--primary); line-height: 1.4; }
.tl-rail { position: relative; display: flex; justify-content: center; }
.tl-rail::before { content: ""; position: absolute; top: 0; bottom: 0; width: 2px; background: linear-gradient(180deg, #1E5EFF, #00B8A9); opacity: .25; }
.tl-dot { position: relative; z-index: 1; align-self: center; width: 14px; height: 14px; border-radius: 50%; background: #fff; border: 3px solid var(--primary); box-shadow: 0 0 0 4px rgba(30,94,255,.15); }
.tl-body { padding: 0 0 40px 26px; }
.tl-row:last-child .tl-body { padding-bottom: 0; }
.tl-body h3 { font-size: 16.5px; margin-bottom: 6px; }
.tl-body p { font-size: 14px; max-width: 560px; }
.tl-body .tl-tags { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.tl-tags span { font-size: 12px; color: var(--muted); background: var(--bg-soft); border: 1px solid var(--line); padding: 3px 10px; border-radius: 999px; }

/* ---------- 案例筛选 ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 44px; }
.filter-btn {
  padding: 9px 22px; border-radius: 999px; font-size: 14px; font-weight: 500;
  color: var(--ink); background: #fff; border: 1px solid var(--line);
  transition: all .2s ease;
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 6px 16px rgba(30,94,255,.25); }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-item.hide { display: none; }

/* ---------- 图表区 ---------- */
.chart-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.chart-box { position: relative; height: 360px; }
.chart-legend { display: grid; gap: 18px; }
.chart-legend li { display: flex; align-items: center; gap: 14px; }
.chart-legend .dot { width: 12px; height: 12px; border-radius: 3px; flex: none; }
.chart-legend strong { display: block; color: var(--ink); font-size: 15px; line-height: 1.3; }
.chart-legend span { font-size: 13px; color: var(--muted); }
.chart-legend .pct { margin-left: auto; font-weight: 900; color: var(--ink); font-size: 16px; }

/* ---------- 技术栈 ---------- */
.tech-groups { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.tech-group h3 { font-size: 16px; margin-bottom: 16px; display: flex; align-items: center; gap: 10px; }
.tech-group h3 svg { width: 20px; height: 20px; color: var(--primary); }
.tech-badges { display: flex; flex-wrap: wrap; gap: 10px; }
.tech-badges span { font-size: 13px; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 7px 14px; font-weight: 500; transition: all .2s ease; }
.tech-badges span:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- 保障项 ---------- */
.guarantee { text-align: center; padding: 30px 20px; }
.guarantee .service-icon { margin: 0 auto 18px; }
.guarantee h3 { font-size: 16.5px; margin-bottom: 8px; }
.guarantee p { font-size: 13.5px; }

/* ---------- 团队 ---------- */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.team-card { text-align: center; padding: 36px 22px 28px; }
.team-card img { width: 108px; height: 108px; border-radius: 50%; object-fit: cover; margin: 0 auto 18px; border: 4px solid #fff; box-shadow: var(--shadow-sm); }
.team-card h3 { font-size: 17px; }
.team-role { display: inline-block; margin: 6px 0 12px; font-size: 13px; font-weight: 700; color: var(--primary); background: rgba(30,94,255,.07); padding: 4px 14px; border-radius: 999px; }
.team-card p { font-size: 13.5px; }

/* ---------- 价值观 ---------- */
.value-card { padding: 34px 30px; }
.value-card .service-icon { margin-bottom: 18px; }
.value-card h3 { font-size: 17px; margin-bottom: 8px; }
.value-card p { font-size: 14px; }

/* ---------- 联系页 ---------- */
.contact-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.contact-card { text-align: center; padding: 38px 22px; }
.contact-card .service-icon { margin: 0 auto 20px; width: 60px; height: 60px; border-radius: 18px; }
.contact-card .service-icon svg { width: 28px; height: 28px; }
.contact-card h3 { font-size: 16.5px; margin-bottom: 8px; }
.contact-card p { font-size: 14px; }
.contact-card p + p { margin-top: 2px; }
.contact-card a:hover { color: var(--primary); }

.contact-split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 64px; align-items: start; }
.contact-info h2 { margin-bottom: 16px; }
.contact-info .lead { margin-bottom: 28px; font-size: 15.5px; }
.info-rows { display: grid; gap: 18px; }
.info-row { display: flex; gap: 16px; padding: 18px 20px; background: #fff; border: 1px solid var(--line); border-radius: 14px; }
.info-row .fi { flex: none; width: 42px; height: 42px; border-radius: 12px; background: var(--grad-soft); color: var(--primary); display: flex; align-items: center; justify-content: center; }
.info-row .fi svg { width: 20px; height: 20px; }
.info-row strong { display: block; color: var(--ink); font-size: 14.5px; margin-bottom: 2px; }
.info-row p { font-size: 13.5px; }

.contact-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.cstep { text-align: center; padding: 30px 20px; }
.cstep-num {
  width: 46px; height: 46px; margin: 0 auto 16px; border-radius: 50%;
  background: var(--grad); color: #fff; font-weight: 900; font-size: 18px;
  display: flex; align-items: center; justify-content: center; box-shadow: 0 8px 20px rgba(30,94,255,.25);
}
.cstep h3 { font-size: 15.5px; margin-bottom: 6px; }
.cstep p { font-size: 13px; }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 46px; height: 46px; border-radius: 12px;
  background: var(--grad); color: #fff; box-shadow: var(--shadow-md);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all .25s ease;
}
.back-top.show { opacity: 1; visibility: visible; transform: none; }
.back-top svg { width: 20px; height: 20px; }
.back-top:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 56px; }
  .hero-media { max-width: 620px; }
  .grid-3, .grid-4, .case-grid, .tech-groups, .team-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cards { grid-template-columns: repeat(2, 1fr); }
  .chart-wrap { grid-template-columns: 1fr; }
  .split { grid-template-columns: 1fr; gap: 44px; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .contact-split { grid-template-columns: 1fr; }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .contact-steps { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 720px) {
  .section { padding: 64px 0; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed; top: 72px; left: 0; right: 0; z-index: 99;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow-md);
    padding: 14px 5%; 
    transform: translateY(-12px); opacity: 0; visibility: hidden; transition: all .25s ease;
  }
  body.nav-open .main-nav { transform: none; opacity: 1; visibility: visible; }
  .main-nav a { padding: 12px 16px; }
  .header-cta { display: none; }
  .hero { padding: 132px 0 90px; }
  .hero-points { gap: 16px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .grid-2, .grid-4, .case-grid, .tech-groups, .team-grid, .contact-cards { grid-template-columns: 1fr; }
  .steps, .contact-steps { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 36px; }
  .tl-row { grid-template-columns: 76px 40px 1fr; }
  .tl-time { font-size: 13.5px; padding-right: 12px; }
  .tl-body { padding-left: 18px; }
  .cta-band { padding: 64px 0; }
  .back-top { right: 16px; bottom: 16px; }
}