:root {
  --primary: #164198;
  --primary-deep: #08173a;
  --primary-dark: #0d2b6b;
  --primary-2: #2f67d8;
  --primary-3: #7ea2f5;
  --primary-soft: #eaf0fd;
  --accent: #ca020a;
  --accent-dark: #a40107;
  --accent-soft: #ff7d83;
  --ink: #101f43;
  --muted: #5d6b85;
  --paper: #f6f8fc;
  --white: #ffffff;
  --line: #dde6f4;
  --shadow-sm: 0 14px 40px rgba(11, 39, 102, .08);
  --shadow-lg: 0 28px 70px rgba(11, 39, 102, .15);
  --radius: 22px;
  --header-height: 74px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(22, 65, 152, .18); color: var(--primary-deep); }

img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--accent); }
ul { list-style: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }

.container { width: min(1200px, calc(100% - 40px)); margin-inline: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap;
}

.icon { display: block; width: 34px; height: 34px; }

/* 顶部信息栏 */
.topbar {
  background: var(--primary-deep);
  color: #aebfdd;
  font-size: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, .07);
  position: relative;
  z-index: 60;
}
.topbar-inner {
  min-height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 6px 0;
}
.topbar a { color: #dbe6ff; }
.topbar a:hover { color: #fff; }
.topbar .topbar-item { display: inline-flex; align-items: center; gap: 7px; letter-spacing: .3px; }
.topbar .topbar-item svg { width: 15px; height: 15px; color: var(--accent-soft); }
.topbar .topbar-right { display: inline-flex; align-items: center; gap: 18px; color: #9fb2d4; letter-spacing: 1px; }

/* 页头导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid rgba(221, 230, 244, .9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(255,255,255,.7) inset;
}
.site-header.scrolled { box-shadow: 0 14px 35px rgba(11, 39, 102, .08); }

.nav-wrap { height: var(--header-height); display: flex; align-items: center; justify-content: space-between; gap: 22px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand-mark {
  width: 48px; height: 48px; flex: 0 0 48px;
  display: grid; place-items: center;
  border-radius: 15px 5px 15px 5px;
  background: linear-gradient(135deg, #0d2b6b, #164198 55%, #2f67d8);
  color: #fff; font-weight: 800; font-size: 22px;
  box-shadow: 0 12px 26px rgba(22, 65, 152, .24);
  position: relative;
}
.brand-mark::after {
  content: ""; position: absolute; right: -4px; top: -4px;
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--accent); border: 2px solid #fff;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 18px; letter-spacing: .6px; font-weight: 700; }
.brand-text small { color: var(--muted); font-size: 10px; letter-spacing: 2.4px; margin-top: 4px; }

.nav-toggle {
  display: none; align-items: center; justify-content: center;
  width: 44px; height: 44px; border: 1px solid var(--line);
  background: #fff; border-radius: 12px; color: var(--primary);
}
.nav-toggle .icon-text { font-size: 24px; line-height: 1; }

.main-nav { display: flex; align-items: center; gap: 22px; }
.main-nav ul { display: flex; gap: 4px; }
.main-nav a {
  position: relative; display: block; padding: 10px 13px;
  color: var(--ink); font-weight: 600; white-space: nowrap; border-radius: 10px;
}
.main-nav a::after {
  content: ""; position: absolute; left: 13px; right: 13px; bottom: 5px;
  height: 2px; border-radius: 2px; background: var(--accent);
  transform: scaleX(0); transform-origin: left; transition: transform .25s ease;
}
.main-nav a:hover, .main-nav a.active { color: var(--primary); }
.main-nav a:hover::after, .main-nav a.active::after { transform: scaleX(1); }
.nav-cta { margin-left: 6px; }
.main-nav .nav-cta { padding: 11px 19px; }
.main-nav .nav-cta::after { display: none; }
.main-nav .nav-cta:hover, .main-nav .nav-cta.btn-primary:hover { color: #fff; }

/* 首页 Hero */
.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 80% 20%, rgba(47, 103, 216, .28), transparent 32%),
    radial-gradient(circle at 12% 88%, rgba(202, 2, 10, .2), transparent 30%),
    linear-gradient(135deg, #08173a 0%, #0d2b6b 48%, #164198 100%);
  min-height: 760px;
  display: flex;
  flex-direction: column;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(126, 162, 245, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 162, 245, .08) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,.8), transparent 88%);
  -webkit-mask-image: linear-gradient(to bottom, rgba(0,0,0,.8), transparent 88%);
}
.hero::after {
  content: ""; position: absolute; right: -120px; top: -130px;
  width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, rgba(202,2,10,.26), transparent 65%);
  filter: blur(4px);
}
.hero-inner {
  position: relative; z-index: 2;
  padding: 108px 0 68px;
  display: grid; grid-template-columns: 1.05fr .95fr;
  gap: 44px; align-items: center;
  flex: 1;
}
.hero-kicker {
  display: inline-flex; align-items: center; gap: 12px;
  color: #cdd9f5; letter-spacing: 2px; font-size: 12px;
  text-transform: uppercase;
}
.hero-kicker::before { content: ""; width: 30px; height: 2px; background: var(--accent); }
.hero h1 {
  font-size: clamp(38px, 5.4vw, 64px);
  line-height: 1.12; margin: 22px 0 20px;
  font-weight: 800; letter-spacing: .6px;
}
.hero h1 .gradient-text {
  background: linear-gradient(100deg, #ff8f94, #ffc1a0 45%, #ff7d83);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { max-width: 620px; color: #b9c8e8; font-size: 17px; line-height: 1.9; }
.hero-actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px; }
.hero-stats {
  position: relative; z-index: 2;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 16px; padding-bottom: 46px;
}
.hero-stat {
  position: relative;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .14);
  border-radius: 18px;
  padding: 20px 22px 18px;
  backdrop-filter: blur(12px);
  overflow: hidden;
}
.hero-stat::before { content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent-soft)); }
.hero-stat strong { display: block; font-size: 28px; color: #fff; font-weight: 750; letter-spacing: .4px; }
.hero-stat span { color: #b9c8e8; font-size: 12px; letter-spacing: .5px; }
.hero-visual { display: flex; align-items: center; justify-content: center; animation: floatY 7s ease-in-out infinite; }
.hero-visual img { width: min(520px, 100%); filter: drop-shadow(0 30px 45px rgba(4, 15, 44, .35)); }

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 24px; border-radius: 13px; border: 1px solid transparent;
  cursor: pointer; font-weight: 700; line-height: 1;
  transition: transform .22s ease, box-shadow .22s ease, background .22s ease, color .22s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: linear-gradient(135deg, #e20b14, var(--accent));
  color: #fff; box-shadow: 0 14px 26px rgba(202, 2, 10, .26);
}
.btn-primary:hover { background: linear-gradient(135deg, #f01720, var(--accent-dark)); color: #fff; }
.btn-ghost { background: rgba(255, 255, 255, .08); color: #fff; border-color: rgba(255, 255, 255, .3); }
.btn-ghost:hover { background: rgba(255, 255, 255, .16); color: #fff; }
.btn-outline { border-color: var(--primary); color: var(--primary); background: #fff; }
.btn-outline:hover { background: var(--primary-soft); color: var(--primary); }
.btn-light { background: #fff; color: var(--primary); box-shadow: 0 12px 28px rgba(8, 23, 58, .18); }
.btn-light:hover { color: var(--primary); background: #f2f6ff; }
.btn-block { width: 100%; }

/* 通用章节 */
.section { padding: 104px 0; }
.section.soft { background: #fff; }
.section-head { max-width: 720px; margin: 0 auto 52px; text-align: center; }
.section-head.left { margin-left: 0; text-align: left; }
.section-head .eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  color: var(--accent); font-weight: 800; letter-spacing: 2.4px; font-size: 12px;
}
.section-head .eyebrow::before, .section-head .eyebrow::after {
  content: ""; width: 22px; height: 1px; background: currentColor; opacity: .5;
}
.section-head.left .eyebrow::before { display: none; }
.section-head h2 { font-size: clamp(28px, 3.6vw, 42px); margin: 14px 0 14px; color: var(--primary-deep); letter-spacing: .4px; }
.section-head p { color: var(--muted); font-size: 16px; }

/* 卡片网格 */
.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); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm);
  transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease;
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); border-color: rgba(22, 65, 152, .28); }
.card-media { aspect-ratio: 16 / 10; background: var(--primary-soft); overflow: hidden; position: relative; }
.card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.card:hover .card-media img { transform: scale(1.05); }
.card-media::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(8, 23, 58, .24), transparent 46%);
  pointer-events: none;
}
.card-media.placeholder {
  display: flex; align-items: center; justify-content: center;
  background:
    radial-gradient(circle at 78% 20%, rgba(202, 2, 10, .12), transparent 32%),
    linear-gradient(135deg, #eaf0fd, #dce8fb);
  color: var(--primary);
}
.card-media.placeholder .icon { width: 72px; height: 72px; opacity: .85; }
.card-body { padding: 24px; }
.card-body .category { display: inline-block; color: var(--accent); font-size: 12px; font-weight: 800; letter-spacing: 1.4px; margin-bottom: 10px; }
.card-body h3 { font-size: 20px; margin-bottom: 10px; line-height: 1.4; }
.card-body h3 a { color: var(--ink); }
.card-body h3 a:hover { color: var(--primary); }
.card-body p { color: var(--muted); font-size: 14px; line-height: 1.8; }
.card-meta { margin-top: 18px; padding-top: 15px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; color: var(--muted); font-size: 12px; }

/* 内页横幅 */
.page-banner {
  position: relative; overflow: hidden;
  background:
    radial-gradient(circle at 80% 20%, rgba(47, 103, 216, .3), transparent 34%),
    linear-gradient(135deg, #08173a, #0d2b6b 55%, #164198);
  color: #fff; padding: 74px 0 78px; text-align: center;
}
.page-banner::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(126, 162, 245, .08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 162, 245, .08) 1px, transparent 1px);
  background-size: 50px 50px;
}
.page-banner .container { position: relative; z-index: 1; }
.page-banner h1 { font-size: clamp(30px, 4.8vw, 46px); margin-bottom: 12px; letter-spacing: 1px; }
.page-banner p { color: #b9c8e8; }
.page-banner .banner-line { width: 46px; height: 3px; border-radius: 4px; background: var(--accent); margin: 16px auto 0; }

/* 简介 + 图片排列 */
.split { display: grid; gap: 64px; align-items: center; grid-template-columns: 1.04fr .96fr; }
.split .text .section-head { margin-bottom: 20px; }
.split .text h2 { font-size: clamp(28px, 3.2vw, 40px); color: var(--primary-deep); margin-bottom: 18px; }
.split .text p { color: var(--muted); margin-bottom: 14px; }
.split .visual {
  position: relative; border-radius: 28px; min-height: 360px; overflow: hidden;
  background: linear-gradient(135deg, #0d2b6b, #164198);
  box-shadow: var(--shadow-lg);
}
.split .visual img { width: 100%; height: 100%; object-fit: cover; border-radius: 28px; }
.split .visual::after { content: ""; position: absolute; right: -28px; bottom: -28px; width: 160px; height: 160px; border: 1px solid rgba(255,255,255,.22); border-radius: 50%; }
.split .visual::before { content: ""; position: absolute; left: 18px; bottom: 18px; width: 18px; height: 18px; border-radius: 50%; background: var(--accent); z-index: 1; box-shadow: 0 0 0 7px rgba(202,2,10,.18); }

/* 特性 */
.feature-list { display: grid; gap: 22px; grid-template-columns: repeat(4, 1fr); }
.feature {
  position: relative; background: #fff; border: 1px solid var(--line); border-radius: 20px;
  padding: 28px 24px; box-shadow: var(--shadow-sm);
  transition: transform .28s ease, box-shadow .28s ease, border-color .28s ease;
}
.feature::before { content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 4px; background: linear-gradient(90deg, var(--accent), transparent); }
.feature:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(22, 65, 152, .3); }
.feature-icon {
  width: 58px; height: 58px; display: grid; place-items: center; border-radius: 17px;
  background: var(--primary-soft); color: var(--primary); margin-bottom: 18px;
}
.feature-icon .icon { width: 30px; height: 30px; }
.feature h3 { font-size: 18px; margin-bottom: 9px; color: var(--primary-deep); }
.feature p { color: var(--muted); font-size: 14px; }

/* 数据条 */
.stats-band {
  position: relative; overflow: hidden;
  background:
    radial-gradient(circle at 15% 20%, rgba(202, 2, 10, .14), transparent 34%),
    linear-gradient(135deg, #08173a, #0d2b6b);
  color: #fff;
}
.stats-band .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; padding: 54px 0; }
.stat-item { text-align: center; position: relative; }
.stat-item + .stat-item::before { content: ""; position: absolute; left: -14px; top: 20%; height: 60%; width: 1px; background: rgba(255,255,255,.14); }
.stat-item strong { display: block; font-size: 36px; font-weight: 800; color: var(--accent-soft); letter-spacing: .5px; }
.stat-item span { color: #b9c8e8; font-size: 13px; letter-spacing: 1px; }

/* 表单 */
.form-panel {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow-sm);
}
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-weight: 700; margin-bottom: 8px; font-size: 14px; color: var(--primary-deep); }
.form-control {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px;
  background: #fbfcfe; color: var(--ink); outline: none; transition: border .2s, box-shadow .2s, background .2s;
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(22, 65, 152, .1); background: #fff; }
textarea.form-control { min-height: 140px; resize: vertical; }
.form-hint { color: var(--muted); font-size: 12px; margin-top: 5px; }
.alert { padding: 13px 16px; border-radius: 12px; margin-bottom: 18px; font-size: 14px; line-height: 1.6; }
.alert-success { background: #eaf8ef; color: #18603b; border: 1px solid #bde7cc; }
.alert-error { background: #fdecec; color: #a40107; border: 1px solid #f5c2c4; }

/* 详情文章 */
.article { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 36px; box-shadow: var(--shadow-sm); }
.article-header { border-bottom: 1px solid var(--line); padding-bottom: 22px; margin-bottom: 28px; }
.article-header h1 { font-size: 32px; line-height: 1.35; margin-bottom: 14px; color: var(--primary-deep); }
.article-meta { color: var(--muted); font-size: 13px; display: flex; flex-wrap: wrap; gap: 18px; }
.article-content { font-size: 16px; color: #28334a; }
.article-content h2, .article-content h3 { margin: 28px 0 12px; color: var(--primary-deep); }
.article-content p { margin-bottom: 16px; }
.article-content img { border-radius: 14px; margin: 18px auto; }
.article-content ul, .article-content ol { margin: 0 0 16px 22px; list-style: disc; }
.article-content table { width: 100%; border-collapse: collapse; margin: 18px 0; }
.article-content th, .article-content td { border: 1px solid var(--line); padding: 10px 12px; }

/* 产品规格表 */
.spec-table { width: 100%; border-collapse: collapse; margin-top: 22px; }
.spec-table th, .spec-table td { border: 1px solid var(--line); padding: 11px 14px; text-align: left; font-size: 14px; }
.spec-table th { background: var(--primary-soft); color: var(--primary-dark); width: 120px; }
.spec-table tr:nth-child(even) td { background: #fbfcfe; }

/* 产品详情双栏 */
.product-detail { display: grid; gap: 34px; grid-template-columns: .92fr 1.08fr; align-items: start; }
.product-detail > .card-media, .product-detail > .visual-box { min-height: 390px; border-radius: var(--radius); }

/* 联系信息 */
.contact-info { display: grid; gap: 16px; grid-template-columns: repeat(2, 1fr); margin-bottom: 24px; }
.contact-item { display: flex; gap: 15px; align-items: flex-start; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 20px; transition: transform .25s, box-shadow .25s; }
.contact-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); }
.contact-item .feature-icon { margin: 0; flex: 0 0 52px; width: 52px; height: 52px; }
.contact-item .feature-icon .icon { width: 26px; height: 26px; }
.contact-item strong { display: block; margin-bottom: 3px; color: var(--primary-deep); }
.contact-item p { color: var(--muted); font-size: 14px; }

/* 空状态 */
.empty { text-align: center; color: var(--muted); padding: 48px 24px; background: #fff; border: 1px dashed var(--line); border-radius: var(--radius); }

/* 页脚 */
.site-footer {
  position: relative; background: #071429; color: #b7c5e1; margin-top: 40px; overflow: hidden;
}
.site-footer::before { content: ""; position: absolute; left: -60px; top: -70px; width: 260px; height: 260px; border-radius: 50%; background: rgba(22, 65, 152, .18); filter: blur(6px); }
.footer-top { position: relative; display: grid; gap: 44px; grid-template-columns: 1.25fr .85fr .9fr; padding: 62px 0 48px; }
.footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 20px; letter-spacing: .8px; }
.footer-col h4::after { content: ""; display: block; width: 26px; height: 2px; background: var(--accent); margin-top: 10px; }
.footer-col p, .footer-col a, .footer-col li { font-size: 14px; }
.footer-col a { color: #b7c5e1; display: inline-block; padding: 4px 0; }
.footer-col a:hover { color: #fff; transform: translateX(3px); }
.footer-col li { margin-bottom: 7px; }
.footer-contact li { display: flex; gap: 10px; align-items: flex-start; }
.footer-contact svg { flex: 0 0 17px; width: 17px; height: 17px; color: var(--accent-soft); margin-top: 4px; }
.footer-bottom { position: relative; border-top: 1px solid rgba(255, 255, 255, .09); padding: 20px 0; text-align: center; font-size: 13px; color: #7f93b8; }
.footer-bottom a { color: #aebfdd; }
.footer-bottom a:hover { color: #fff; }

/* 返回顶部 */
.back-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 40;
  width: 46px; height: 46px; border: 0; border-radius: 14px;
  background: var(--primary); color: #fff; cursor: pointer; font-size: 20px;
  opacity: 0; pointer-events: none; transform: translateY(10px);
  transition: opacity .25s, transform .25s, background .2s; box-shadow: 0 12px 28px rgba(22, 65, 152, .3);
}
.back-top:hover { background: var(--primary-dark); }
.back-top svg { transform: rotate(-90deg); margin: auto; }
.back-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }

/* 响应式 */
@media (max-width: 1080px) {
  .feature-list { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { gap: 28px; }
  .hero-visual img { width: 430px; }
}

@media (max-width: 900px) {
  :root { --header-height: 66px; }
  .topbar .topbar-right { display: none; }
  .nav-toggle { display: flex; }
  .main-nav {
    display: none;
    position: absolute; left: 0; right: 0; top: var(--header-height);
    flex-direction: column; align-items: stretch; gap: 6px;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 14px 18px 20px; box-shadow: 0 24px 40px rgba(11, 39, 102, .12);
  }
  .main-nav.open { display: flex; }
  .main-nav ul { flex-direction: column; gap: 2px; }
  .main-nav a { padding: 13px 12px; }
  .main-nav a::after { display: none; }
  .main-nav .nav-cta { margin: 8px 0 0; }

  .hero { min-height: auto; }
  .hero-inner { grid-template-columns: 1fr; padding: 72px 0 40px; }
  .hero-visual { order: 2; }
  .hero-visual img { width: min(430px, 88%); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }

  .section { padding: 72px 0; }
  .split { grid-template-columns: 1fr; gap: 34px; }
  .split .visual { min-height: 300px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .stats-band .container { grid-template-columns: repeat(2, 1fr); }
  .stat-item + .stat-item::before { display: none; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  .container { width: min(100% - 28px, 1200px); }
  .topbar-inner { justify-content: center; }
  .topbar .topbar-item:last-child { display: none; }
  .brand-text small { display: none; }
  .hero-inner { padding-top: 56px; }
  .hero h1 { font-size: 36px; }
  .hero p.lead { font-size: 15px; }
  .hero-actions .btn { flex: 1; }
  .hero-stats { gap: 10px; padding-bottom: 30px; }
  .hero-stat { padding: 16px; }
  .hero-stat strong { font-size: 22px; }

  .grid-2, .grid-3, .grid-4, .feature-list { grid-template-columns: 1fr; }
  .grid { gap: 16px; }
  .card-body { padding: 20px; }
  .article { padding: 24px 20px; }
  .article-header h1 { font-size: 24px; }
  .form-panel { padding: 22px 18px; }
  .contact-info { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; padding-top: 48px; }
  .stats-band .container { gap: 22px 12px; padding: 40px 0; }
  .stat-item strong { font-size: 28px; }
}

/* 滚动显现 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-visual { animation: none; }
}