/* ==========================================================================
   苏州适普医疗 · 官网样式系统 v2
   深化设计：医疗科技 / 专业信赖 / 纯净现代
   ========================================================================== */

:root {
  --primary: #0E5AA7;
  --primary-600: #0B4A8C;
  --primary-700: #093C73;
  --primary-800: #07305C;
  --primary-050: #EAF3FC;
  --primary-100: #D6E7F8;
  --accent: #00A8B5;
  --accent-600: #008C99;
  --accent-050: #E2F6F7;
  --ink: #12233B;
  --muted: #5B6B82;
  --muted-2: #8A97AC;
  --line: #E3EAF2;
  --bg: #F5F8FC;
  --surface: #FFFFFF;
  --success: #17805B;
  --success-050: #E4F4EE;
  --warning: #B7791F;
  --warning-050: #FBF1DF;
  --danger: #C0392B;
  --danger-050: #FBE9E7;
  --radius-lg: 20px;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(9, 60, 115, 0.06);
  --shadow: 0 8px 24px rgba(9, 60, 115, 0.10);
  --shadow-lg: 0 18px 48px rgba(9, 60, 115, 0.16);
  --font: "Segoe UI", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --header-h: 72px;
  --container: 1200px;
  --grad-hero: linear-gradient(135deg, #07305C 0%, #0B4A8C 46%, #0E6FA8 78%, #00838F 100%);
  --grad-band: linear-gradient(120deg, #0B4A8C 0%, #0E6FA8 55%, #00A8B5 130%);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--primary-600); }

h1, h2, h3, h4 { margin: 0; line-height: 1.3; color: var(--ink); font-weight: 700; }

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

/* ---------- 跳过链接(无障碍) ---------- */
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 1000;
  background: var(--primary); color: #fff; padding: 10px 16px; border-radius: 0 0 10px 0;
}
.skip-link:focus { left: 0; }

/* ==========================================================================
   顶部导航
   ========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s, box-shadow .25s, background .25s;
}
.site-header.scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 6px 20px rgba(9,60,115,.06);
}
.header-inner { height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: 16px; }

.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-logo { width: 42px; height: 42px; border-radius: 10px; box-shadow: var(--shadow-sm); }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 19px; font-weight: 800; color: var(--primary-700); letter-spacing: .5px; }
.brand-sub { font-size: 11.5px; color: var(--muted); letter-spacing: 1px; }

.nav-menu { display: flex; align-items: center; gap: 6px; }
.nav-link {
  position: relative; padding: 9px 14px; border-radius: 8px;
  font-size: 15px; color: var(--ink); font-weight: 500;
}
.nav-link::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 4px;
  height: 2.5px; border-radius: 2px; background: var(--accent);
  transform: scaleX(0); transform-origin: center; transition: transform .25s;
}
.nav-link:hover { color: var(--primary); background: var(--primary-050); }
.nav-link.active { color: var(--primary-600); font-weight: 600; }
.nav-link.active::after { transform: scaleX(1); }
.nav-cta { margin-left: 10px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 22px; border-radius: 999px; border: 1.5px solid transparent;
  font-size: 15px; font-weight: 600; cursor: pointer; line-height: 1.2;
  transition: transform .18s, box-shadow .18s, background .18s, border-color .18s, color .18s;
  text-align: center;
}
.btn svg { width: 16px; height: 16px; flex: none; }
.btn:active { transform: translateY(1px) scale(.99); }
.btn-primary { background: var(--grad-band); color: #fff; box-shadow: 0 6px 18px rgba(14,90,167,.30); }
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 10px 24px rgba(14,90,167,.36); }
.btn-outline { border-color: rgba(255,255,255,.65); color: #fff; background: rgba(255,255,255,.06); }
.btn-outline:hover { color: #fff; border-color: #fff; background: rgba(255,255,255,.14); transform: translateY(-2px); }
.btn-light { background: #fff; color: var(--primary-700); box-shadow: 0 8px 20px rgba(7,48,92,.22); }
.btn-light:hover { color: var(--primary-700); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(7,48,92,.28); }
.btn-ghost { border-color: var(--line); color: var(--primary-600); background: #fff; }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.btn-lg { padding: 14px 30px; font-size: 16px; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 10px; }
.nav-toggle span { width: 22px; height: 2px; border-radius: 2px; background: var(--ink); transition: .25s; }

/* ==========================================================================
   按钮类通用
   ========================================================================== */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 600; padding: 5px 12px; border-radius: 999px; line-height: 1.4;
}
.badge svg { width: 14px; height: 14px; flex: none; }
.badge-blue { background: var(--primary-050); color: var(--primary-600); }
.badge-teal { background: var(--accent-050); color: var(--accent-600); }
.badge-green { background: var(--success-050); color: var(--success); }
.badge-amber { background: var(--warning-050); color: var(--warning); }
.badge-red { background: var(--danger-050); color: var(--danger); }

/* ==========================================================================
   Hero（首页）
   ========================================================================== */
.hero {
  position: relative; overflow: hidden;
  background: var(--grad-hero);
  color: #fff; padding: 96px 0 120px;
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255,255,255,.14) 1px, transparent 1px);
  background-size: 26px 26px;
  mask-image: radial-gradient(ellipse at 30% 30%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 30% 30%, #000 0%, transparent 70%);
}
.hero::after {
  content: ""; position: absolute; width: 560px; height: 560px; border-radius: 50%;
  right: -160px; top: -180px;
  background: radial-gradient(circle, rgba(0,168,181,.38) 0%, transparent 62%);
  pointer-events: none;
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.hero-eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; color: #CFE7FF; letter-spacing: .5px; margin-bottom: 18px; }
.hero-eyebrow .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(0,168,181,.25); }
.hero-title { font-size: clamp(34px, 4.6vw, 52px); font-weight: 800; color: #fff; letter-spacing: 1px; line-height: 1.18; }
.hero-title .grad { background: linear-gradient(90deg, #7FD7E0, #FFFFFF); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { margin-top: 14px; font-size: 20px; font-weight: 600; color: #DCEBFA; }
.hero-desc { margin-top: 16px; font-size: 16px; color: rgba(255,255,255,.82); max-width: 560px; }
.hero-actions { margin-top: 30px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-points { margin-top: 34px; display: flex; gap: 10px 26px; flex-wrap: wrap; }
.hero-point { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: #EAF3FC; }
.hero-point svg { width: 17px; height: 17px; color: #7FD7E0; flex: none; }
.hero-point strong { color: #fff; font-weight: 600; }

/* 首页右侧视觉卡 */
.hero-visual { position: relative; min-height: 420px; }
.hcard {
  position: absolute; background: rgba(255,255,255,.97); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); padding: 22px; color: var(--ink);
}
.hcard-main { inset: 6px 0 auto auto; width: 300px; }
.hcard-main .hcard-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.hcard-main .hcard-ico { width: 46px; height: 46px; border-radius: 12px; background: var(--primary-050); display: flex; align-items: center; justify-content: center; color: var(--primary); }
.hcard-main .hcard-ico svg { width: 24px; height: 24px; }
.hcard-main h3 { font-size: 15px; }
.hcard-main .hcard-meta { font-size: 12.5px; color: var(--muted); }
.hcard-row { display: flex; align-items: center; justify-content: space-between; padding: 11px 0; border-bottom: 1px dashed var(--line); font-size: 13.5px; }
.hcard-row:last-child { border-bottom: 0; }
.hcard-row span { color: var(--muted); }
.hcard-row strong { font-weight: 600; color: var(--ink); font-size: 14px; }
.hcard-float { width: 200px; right: -26px; bottom: 6px; }
.hcard-float .stat-num { font-size: 30px; font-weight: 800; color: var(--primary); line-height: 1; }
.hcard-float .stat-num small { font-size: 15px; color: var(--muted); font-weight: 600; }
.hcard-float .stat-label { margin-top: 6px; font-size: 13px; color: var(--muted); }
.hcard-chip {
  width: 210px; left: 0; top: 18px;
  display: flex; align-items: center; gap: 12px;
}
.hcard-chip .chip-ico { width: 40px; height: 40px; border-radius: 10px; background: var(--success-050); color: var(--success); display: flex; align-items: center; justify-content: center; flex: none; }
.hcard-chip .chip-ico svg { width: 20px; height: 20px; }
.hcard-chip .chip-title { font-size: 13.5px; font-weight: 700; }
.hcard-chip .chip-sub { font-size: 11.5px; color: var(--muted); }

/* ==========================================================================
   通用区块
   ========================================================================== */
.section { padding: 84px 0; }
.section.tight { padding: 64px 0; }
.section-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.section-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 700; letter-spacing: 3px; color: var(--accent-600); text-transform: uppercase;
}
.section-eyebrow::before, .section-eyebrow::after { content: ""; width: 26px; height: 1.5px; background: var(--accent); opacity: .5; }
.section-title { margin-top: 12px; font-size: clamp(26px, 3.2vw, 36px); font-weight: 800; letter-spacing: .5px; }
.section-sub { margin-top: 12px; font-size: 15.5px; color: var(--muted); }

/* ==========================================================================
   卡片通用
   ========================================================================== */
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 26px; box-shadow: var(--shadow-sm);
  transition: transform .22s, box-shadow .22s, border-color .22s;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #C9DBEE; }
.card-ico {
  width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  color: var(--primary); background: var(--primary-050); margin-bottom: 16px;
}
.card-ico.teal { background: var(--accent-050); color: var(--accent-600); }
.card-ico.green { background: var(--success-050); color: var(--success); }
.card-ico.amber { background: var(--warning-050); color: var(--warning); }
.card-ico svg { width: 26px; height: 26px; }
.card h3 { font-size: 17px; margin-bottom: 8px; }
.card p { margin: 0; font-size: 14px; color: var(--muted); }

/* ==========================================================================
   Page Hero（内页）
   ========================================================================== */
.page-hero {
  position: relative; overflow: hidden; color: #fff;
  background: var(--grad-hero); padding: 64px 0 58px;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255,255,255,.13) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: radial-gradient(ellipse at 70% 20%, #000 0%, transparent 68%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 20%, #000 0%, transparent 68%);
}
.page-hero .container { position: relative; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255,255,255,.72); margin-bottom: 16px; }
.breadcrumb a { color: rgba(255,255,255,.85); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { opacity: .5; }
.page-hero h1 { color: #fff; font-size: clamp(28px, 3.4vw, 40px); font-weight: 800; letter-spacing: .5px; }
.page-hero .lead { margin-top: 12px; font-size: 16px; color: rgba(255,255,255,.85); max-width: 720px; }

/* ==========================================================================
   产品卡片
   ========================================================================== */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card { position: relative; overflow: hidden; }
.product-card::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 4px;
  background: var(--grad-band); transform: scaleX(0); transform-origin: left; transition: transform .3s;
}
.product-card:hover::after { transform: scaleX(1); }
.product-card .tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.product-card .pdesc { font-size: 14px; color: var(--muted); margin-top: 10px; min-height: 62px; }
.product-tag-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.scene { font-size: 13px; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; }
.scene::before { content: "•"; color: var(--accent); font-weight: 700; }

/* ==========================================================================
   资质卡片
   ========================================================================== */
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.cert-card { display: flex; flex-direction: column; }
.cert-card .cert-ico { width: 54px; height: 54px; border-radius: 14px; background: var(--primary-050); color: var(--primary); display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.cert-card .cert-ico svg { width: 28px; height: 28px; }
.cert-card h3 { font-size: 16.5px; }
.cert-card .cert-no { margin-top: 6px; font-size: 14px; color: var(--ink); font-weight: 600; word-break: break-all; }
.cert-card .cert-meta { margin-top: 4px; font-size: 13px; color: var(--muted); }
.cert-card .cert-file { margin-top: 14px; }

.file-box {
  margin-top: 12px; border: 1.5px dashed #BFD3E8; border-radius: var(--radius);
  background: #F8FBFE; aspect-ratio: 4 / 3; min-height: 130px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
  color: var(--muted-2); font-size: 13px; text-align: center; padding: 12px;
}
.file-box svg { width: 26px; height: 26px; opacity: .6; }

/* ==========================================================================
   合作伙伴
   ========================================================================== */
.partner-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.partner-card { display: flex; align-items: flex-start; gap: 16px; }
.partner-card .p-logo { width: 54px; height: 54px; border-radius: 14px; background: var(--primary-050); color: var(--primary-600); display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 19px; flex: none; }
.partner-card h3 { font-size: 16.5px; }
.partner-card .p-sub { font-size: 13px; color: var(--muted); margin-top: 3px; }
.partner-card .p-tag { margin-top: 8px; }

/* ==========================================================================
   统计 / 步骤 / 时间轴
   ========================================================================== */
.stat-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  margin-top: -62px; position: relative; z-index: 5;
}
.stat-card { background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow); padding: 24px 18px; text-align: center; }
.stat-num { font-size: 36px; font-weight: 800; color: var(--primary); line-height: 1; }
.stat-num small { font-size: 17px; color: var(--accent-600); font-weight: 700; }
.stat-label { margin-top: 8px; font-size: 13.5px; color: var(--muted); }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; counter-reset: step; }
.step-card { position: relative; }
.step-card .step-no {
  width: 44px; height: 44px; border-radius: 50%; background: var(--grad-band); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 18px; margin-bottom: 16px;
  box-shadow: 0 6px 16px rgba(14,90,167,.28);
}

.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 9px; top: 6px; bottom: 6px; width: 2px; background: linear-gradient(#0E5AA7, #00A8B5); border-radius: 2px; }
.timeline-item { position: relative; padding: 0 0 40px 26px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: ""; position: absolute; left: -25px; top: 6px; width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 4px solid var(--primary);
}
.timeline-item:nth-child(2)::before { border-color: var(--accent); }
.timeline-item:nth-child(3)::before { border-color: var(--success); }
.timeline-year { font-size: 15px; font-weight: 800; color: var(--primary-600); letter-spacing: 1px; }
.timeline-title { font-size: 18px; font-weight: 700; margin-top: 4px; }
.timeline-desc { font-size: 14.5px; color: var(--muted); margin-top: 6px; }

/* ==========================================================================
   信息表 / 联系卡片
   ========================================================================== */
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; }
.info-cell { background: #fff; padding: 18px 22px; display: flex; gap: 18px; align-items: flex-start; }
.info-cell .k { width: 130px; flex: none; font-size: 14px; color: var(--muted); padding-top: 2px; }
.info-cell .v { font-size: 14.5px; color: var(--ink); font-weight: 500; }

.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.contact-card { text-align: center; padding: 30px 18px; }
.contact-card .c-ico {
  width: 54px; height: 54px; margin: 0 auto 14px; border-radius: 50%;
  background: var(--primary-050); color: var(--primary); display: flex; align-items: center; justify-content: center;
}
.contact-card .c-ico svg { width: 26px; height: 26px; }
.contact-card h3 { font-size: 15px; }
.contact-card .c-val { margin-top: 6px; font-size: 14.5px; color: var(--ink); font-weight: 600; word-break: break-all; }
.contact-card .c-val a { color: var(--ink); }
.contact-card .c-val a:hover { color: var(--primary); }

.qr-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.qr-card { text-align: center; padding: 30px 24px; }
.qr-box {
  width: 168px; height: 168px; margin: 0 auto 16px; border-radius: var(--radius);
  background: #F2F6FB; border: 1.5px dashed #BFD3E8;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
  color: var(--muted-2); font-size: 12.5px;
}
.qr-box svg { width: 30px; height: 30px; opacity: .55; }

/* ==========================================================================
   CTA 条
   ========================================================================== */
.cta-band {
  position: relative; overflow: hidden; border-radius: var(--radius-lg);
  background: var(--grad-band); color: #fff; padding: 46px 48px;
  display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap;
  box-shadow: var(--shadow-lg);
}
.cta-band::before {
  content: ""; position: absolute; right: -60px; top: -90px; width: 260px; height: 260px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,.18) 0%, transparent 65%);
}
.cta-title { font-size: 24px; font-weight: 800; color: #fff; }
.cta-sub { margin-top: 6px; font-size: 15px; color: rgba(255,255,255,.86); }
.cta-actions { position: relative; display: flex; gap: 12px; flex-wrap: wrap; }

/* ==========================================================================
   提示框 callout
   ========================================================================== */
.callout {
  display: flex; gap: 14px; align-items: flex-start;
  border-radius: var(--radius); padding: 18px 20px; font-size: 14px; line-height: 1.7;
}
.callout svg { width: 20px; height: 20px; flex: none; margin-top: 2px; }
.callout-info { background: var(--primary-050); color: var(--primary-700); }
.callout-warn { background: var(--warning-050); color: var(--warning); }
.callout-note { background: var(--accent-050); color: var(--accent-600); }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer { background: #0B2B4D; color: #C7D6E8; margin-top: 0; }
.footer-top { padding: 60px 0 40px; display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; }
.footer-brand .brand-name { color: #fff; }
.footer-brand .brand-sub { color: #8FA8C4; }
.footer-about { margin-top: 14px; font-size: 13.5px; color: #A9BFD8; max-width: 320px; line-height: 1.8; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 18px; letter-spacing: 1px; }
.footer-links { display: flex; flex-direction: column; gap: 11px; }
.footer-links a { color: #A9BFD8; font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-contact { display: flex; flex-direction: column; gap: 13px; font-size: 13.5px; }
.footer-contact span { display: flex; gap: 9px; align-items: flex-start; color: #A9BFD8; }
.footer-contact svg { width: 16px; height: 16px; flex: none; margin-top: 3px; color: #5FA8D9; }
.footer-contact a { color: #A9BFD8; }
.footer-contact a:hover { color: #fff; }
.footer-qual { display: flex; flex-direction: column; gap: 10px; font-size: 12.5px; color: #8FA8C4; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.10); padding: 18px 0; text-align: center; font-size: 12.5px; color: #8FA8C4; }
.footer-bottom .f-line { margin-bottom: 6px; }
.footer-bottom a { color: #8FA8C4; }
.footer-bottom a:hover { color: #fff; }
.footer-bottom .sep { margin: 0 8px; opacity: .5; }

/* ==========================================================================
   返回顶部
   ========================================================================== */
.back-to-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%; border: 0; cursor: pointer;
  background: var(--grad-band); color: #fff; box-shadow: var(--shadow-lg);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transform: translateY(16px); pointer-events: none;
  transition: opacity .3s, transform .3s;
}
.back-to-top.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top svg { width: 20px; height: 20px; }

/* ==========================================================================
   滚动显现动画
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .hero, .page-hero { animation: none; }
}

/* ==========================================================================
   404
   ========================================================================== */
.notfound { min-height: 62vh; display: flex; align-items: center; text-align: center; }
.notfound-code {
  font-size: clamp(96px, 18vw, 180px); font-weight: 800; line-height: 1;
  background: var(--grad-hero); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.notfound-title { font-size: 24px; font-weight: 700; margin-top: 8px; }
.notfound-desc { color: var(--muted); margin: 12px 0 28px; }

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 80px; }
  .hero-visual { min-height: 400px; max-width: 520px; }
  .product-grid, .cert-grid, .partner-grid, .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .site-header { height: 64px; }
  .header-inner { height: 64px; }
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed; top: 64px; left: 0; right: 0; bottom: 0; z-index: 99;
    background: #fff; flex-direction: column; align-items: stretch; gap: 4px;
    padding: 20px 24px;
    transform: translateX(100%); transition: transform .3s ease;
    box-shadow: -20px 0 60px rgba(9,60,115,.12);
  }
  .nav-menu.open { transform: translateX(0); }
  .nav-link { font-size: 17px; padding: 14px 12px; border-bottom: 1px solid var(--line); border-radius: 0; }
  .nav-link::after { display: none; }
  .nav-cta { margin: 18px 0 0; }
  .hero { padding: 56px 0 96px; }
  .hero-visual { min-height: 340px; }
  .hcard-main { width: 260px; }
  .hcard-chip { width: 180px; }
  .hcard-float { width: 170px; right: -10px; }
  .section { padding: 60px 0; }
  .product-grid, .cert-grid, .partner-grid, .contact-grid, .qr-grid, .stat-strip, .info-grid { grid-template-columns: 1fr; }
  .stat-strip { margin-top: -48px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .cta-band { padding: 34px 26px; }
  .info-cell { flex-direction: column; gap: 6px; }
  .info-cell .k { width: auto; }
}

@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-points { flex-direction: column; gap: 10px; }
  .brand-name { font-size: 17px; }
  .brand-sub { font-size: 10.5px; }
}