/* ==========================================================================
   优塑包装 · 企业官网 全局样式
   本地化字体：fonts/yousu-400.woff2 / yousu-700.woff2（Noto Sans CJK SC 子集）
   ========================================================================== */

@font-face {
  font-family: 'Yousu';
  src: url('../fonts/yousu-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Yousu';
  src: url('../fonts/yousu-700.woff2') format('woff2');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --blue-950: #082a4a;
  --blue-900: #0b3a66;
  --blue-700: #0e5fa8;
  --blue-500: #1373c0;
  --blue-300: #5fa3d9;
  --blue-100: #e3f0fb;
  --green-600: #1e9e6b;
  --green-100: #e2f5ec;
  --ink: #18242f;
  --text: #44586b;
  --muted: #7e8f9f;
  --bg: #ffffff;
  --bg-soft: #f3f7fb;
  --line: #e2eaf2;
  --shadow: 0 10px 30px rgba(11, 58, 102, 0.08);
  --radius: 12px;
  --container: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Yousu', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

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

/* ---------------- 通用组件 ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  transition: background .2s, color .2s, transform .2s, box-shadow .2s;
}
.btn svg { width: 16px; height: 16px; }
.btn-primary { background: var(--blue-500); color: #fff; }
.btn-primary:hover { background: var(--blue-700); box-shadow: 0 8px 20px rgba(19, 115, 192, 0.35); transform: translateY(-1px); }
.btn-ghost { border: 1.5px solid rgba(255, 255, 255, 0.75); color: #fff; }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.14); }
.btn-line { border: 1.5px solid var(--blue-500); color: var(--blue-700); }
.btn-line:hover { background: var(--blue-100); }

.sec { padding: 84px 0; }
.sec-soft { background: var(--bg-soft); }
.sec-tight { padding: 64px 0; }

.sec-head { max-width: 720px; margin: 0 auto 48px; text-align: center; }
.sec-head.left { margin-left: 0; text-align: left; }
.sec-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  color: var(--blue-700);
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.sec-tag::before { content: ''; width: 22px; height: 2px; background: var(--green-600); display: inline-block; }
.sec-tag::after { content: ''; width: 22px; height: 2px; background: var(--green-600); display: inline-block; }
.sec-head.left .sec-tag::after { display: none; }
.sec-title { font-size: 32px; line-height: 1.35; color: var(--ink); font-weight: 700; }
.sec-sub { margin-top: 12px; font-size: 16px; color: var(--muted); }

/* 卡片 */
.card { background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; transition: box-shadow .25s, transform .25s; }
.card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.card-img { aspect-ratio: 4 / 3; overflow: hidden; }
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.card:hover .card-img img { transform: scale(1.05); }
.card-body { padding: 20px 22px 24px; }
.card-title { font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.card-desc { font-size: 14px; color: var(--muted); line-height: 1.7; }
.card-link { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; font-size: 14px; font-weight: 700; color: var(--blue-700); }
.card-link svg { width: 14px; height: 14px; transition: transform .2s; }
.card:hover .card-link svg { transform: translateX(4px); }

/* 区块标题小卡 */
.chip { display: inline-block; padding: 3px 12px; border-radius: 999px; font-size: 12px; font-weight: 700; }

/* ==========================================================================
   顶栏 + 导航
   ========================================================================== */

.topbar { background: var(--blue-950); color: rgba(255, 255, 255, 0.82); font-size: 13px; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; height: 38px; }
.topbar a:hover { color: #fff; }
.topbar-left, .topbar-right { display: flex; gap: 22px; align-items: center; }
.topbar svg { width: 14px; height: 14px; vertical-align: -2px; margin-right: 5px; }

.header { position: sticky; top: 0; z-index: 100; background: rgba(255, 255, 255, 0.96); border-bottom: 1px solid var(--line); transition: box-shadow .25s; }
.header.scrolled { box-shadow: 0 6px 24px rgba(11, 58, 102, 0.08); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }

.logo { display: flex; align-items: center; gap: 12px; }
.logo img { height: 46px; width: auto; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav a { display: block; padding: 10px 16px; font-size: 15px; font-weight: 700; color: var(--ink); border-radius: 8px; transition: color .2s, background .2s; }
.nav a:hover { color: var(--blue-700); background: var(--blue-100); }
.nav a.active { color: var(--blue-700); }
.nav a.active::after { content: ''; display: block; height: 2px; background: var(--green-600); border-radius: 2px; margin-top: 2px; }

.nav-cta { margin-left: 10px; padding: 9px 20px; border-radius: 8px; background: var(--blue-500); color: #fff !important; font-size: 14px; font-weight: 700; transition: background .2s; }
.nav-cta:hover { background: var(--blue-700); }

.nav-toggle { display: none; padding: 8px; }
.nav-close { display: none; }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero { position: relative; min-height: 620px; display: flex; align-items: center; color: #fff; background: url('../assets/images/hero-factory.jpg') center 40% / cover no-repeat; }
.hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(100deg, rgba(8, 42, 74, 0.92) 0%, rgba(11, 58, 102, 0.72) 48%, rgba(11, 58, 102, 0.35) 100%); }
.hero .container { position: relative; z-index: 1; }
.hero-eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 700; letter-spacing: 3px; color: #bfe0f8; margin-bottom: 20px; }
.hero-eyebrow::before { content: ''; width: 30px; height: 2px; background: var(--green-600); }
.hero h1 { font-size: 48px; line-height: 1.28; font-weight: 700; max-width: 760px; }
.hero h1 em { font-style: normal; color: #7fc4ef; }
.hero-sub { margin-top: 20px; font-size: 17px; line-height: 1.9; max-width: 620px; color: rgba(255, 255, 255, 0.86); }
.hero-actions { display: flex; gap: 16px; margin-top: 36px; flex-wrap: wrap; }

/* 数据条 */
.stats-band { background: var(--blue-900); color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 44px 0; }
.stat { text-align: center; padding: 8px 12px; }
.stat-num { font-size: 40px; font-weight: 700; color: #fff; line-height: 1.2; }
.stat-num .unit { font-size: 16px; font-weight: 400; margin-left: 2px; color: #9fc4e8; }
.stat-label { margin-top: 6px; font-size: 14px; color: rgba(255, 255, 255, 0.72); }
.stat + .stat { border-left: 1px solid rgba(255, 255, 255, 0.14); }

/* 内页 page-hero */
.page-hero { position: relative; padding: 84px 0 76px; color: #fff; text-align: center; }
.page-hero::before { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(8, 42, 74, 0.78), rgba(11, 58, 102, 0.72)); }
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: 38px; font-weight: 700; }
.page-hero p { margin-top: 12px; font-size: 16px; color: rgba(255, 255, 255, 0.85); max-width: 640px; margin-left: auto; margin-right: auto; }
.crumb { margin-top: 18px; font-size: 13px; color: rgba(255, 255, 255, 0.7); }
.crumb a { color: rgba(255, 255, 255, 0.85); }
.crumb a:hover { color: #fff; }

/* ==========================================================================
   首页：优势 / 产品 / 应用 / 实力 / 新闻 / CTA
   ========================================================================== */

.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature-card { padding: 30px 26px; }
.feature-icon { width: 54px; height: 54px; border-radius: 14px; display: flex; align-items: center; justify-content: center; background: var(--blue-100); color: var(--blue-700); margin-bottom: 18px; }
.feature-icon svg { width: 26px; height: 26px; }
.feature-card:nth-child(2n) .feature-icon { background: var(--green-100); color: var(--green-600); }
.feature-title { font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
.feature-desc { font-size: 14px; color: var(--muted); }

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

.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.app-card .card-img { aspect-ratio: 16 / 10; }

.strength { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }
.chart-box { width: 100%; height: 340px; }
.strength-points li { display: flex; gap: 14px; padding: 16px 0; border-bottom: 1px dashed var(--line); }
.strength-points li:last-child { border-bottom: none; }
.point-num { flex: none; width: 40px; height: 40px; border-radius: 10px; background: var(--blue-100); color: var(--blue-700); font-weight: 700; display: flex; align-items: center; justify-content: center; font-size: 16px; }
.point-title { font-weight: 700; color: var(--ink); }
.point-desc { font-size: 14px; color: var(--muted); }

.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card .card-img { aspect-ratio: 16 / 10; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; font-size: 13px; color: var(--muted); }
.news-meta .chip { background: var(--blue-100); color: var(--blue-700); }

.cta-band { background: linear-gradient(120deg, var(--blue-950), var(--blue-900)); color: #fff; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; padding: 56px 0; flex-wrap: wrap; }
.cta-inner h2 { font-size: 30px; font-weight: 700; }
.cta-inner p { margin-top: 8px; color: rgba(255, 255, 255, 0.78); }
.cta-actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.cta-tel { font-size: 24px; font-weight: 700; color: #fff; display: flex; align-items: center; gap: 10px; }
.cta-tel svg { width: 22px; height: 22px; color: #7fc4ef; }

/* ==========================================================================
   关于我们
   ========================================================================== */

.about-intro { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.about-intro .intro-img { border-radius: var(--radius); overflow: hidden; }
.about-intro .intro-img img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.intro-copy p + p { margin-top: 14px; }
.intro-copy strong { color: var(--ink); }

.mv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.mv-card { padding: 32px 28px; text-align: center; }
.mv-icon { width: 56px; height: 56px; margin: 0 auto 18px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: var(--blue-100); color: var(--blue-700); }
.mv-card:nth-child(2) .mv-icon { background: var(--green-100); color: var(--green-600); }
.mv-card:nth-child(3) .mv-icon { background: #fdf0e3; color: #d97b29; }
.mv-icon svg { width: 26px; height: 26px; }
.mv-title { font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }

/* 时间轴：grid 三列（时间 / 轴 / 内容），圆点与标题首行像素级对齐 */
.timeline { --tl-t: 150px; --tl-a: 64px; display: grid; grid-template-columns: var(--tl-t) var(--tl-a) 1fr; }
.tl-item { display: grid; grid-template-columns: var(--tl-t) var(--tl-a) 1fr; grid-column: 1 / -1; }
.tl-time { text-align: right; padding: 0; font-size: 17px; font-weight: 700; color: var(--blue-700); }
.tl-time small { display: block; font-size: 12px; font-weight: 400; color: var(--muted); }
.tl-axis { position: relative; justify-self: center; }
.tl-axis::before { content: ''; position: absolute; top: 0; bottom: 0; left: 50%; transform: translateX(-50%); width: 2px; background: var(--line); }
.tl-axis::after { content: ''; position: absolute; top: 8px; left: 50%; transform: translateX(-50%); width: 14px; height: 14px; border-radius: 50%; background: var(--blue-500); box-shadow: 0 0 0 4px var(--blue-100); }
.tl-item:last-child .tl-axis::before { height: 16px; }
.tl-content { padding: 0 0 34px 26px; }
.tl-title { font-size: 17px; font-weight: 700; color: var(--ink); }
.tl-desc { margin-top: 4px; font-size: 14px; color: var(--muted); max-width: 560px; }

.fact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.fact-card { padding: 0; }
.fact-card .card-img { aspect-ratio: 4 / 3; }
.fact-body { padding: 20px 22px 24px; }

.cert-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.cert-card { border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 20px; text-align: center; background: var(--bg); transition: box-shadow .25s, transform .25s; }
.cert-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.cert-icon { width: 46px; height: 46px; margin: 0 auto 14px; color: var(--green-600); }
.cert-icon svg { width: 100%; height: 100%; }
.cert-name { font-weight: 700; color: var(--ink); font-size: 16px; }
.cert-sub { margin-top: 4px; font-size: 13px; color: var(--muted); }

/* ==========================================================================
   产品中心
   ========================================================================== */

.filter-bar { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 40px; }
.filter-btn { padding: 9px 22px; border-radius: 999px; border: 1px solid var(--line); background: var(--bg); font-size: 14px; font-weight: 700; color: var(--text); transition: all .2s; }
.filter-btn:hover { border-color: var(--blue-500); color: var(--blue-700); }
.filter-btn.active { background: var(--blue-500); border-color: var(--blue-500); color: #fff; }

.product-detail { display: grid; grid-template-columns: 46% 1fr; gap: 48px; align-items: center; padding: 56px 0; border-bottom: 1px solid var(--line); }
.product-detail:last-child { border-bottom: none; }
.product-detail:nth-child(even) .pd-img { order: 2; }
.pd-img { border-radius: var(--radius); overflow: hidden; }
.pd-img img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.pd-title { font-size: 26px; font-weight: 700; color: var(--ink); display: flex; align-items: center; gap: 12px; }
.pd-title .idx { font-size: 14px; color: var(--muted); font-weight: 400; }
.pd-desc { margin-top: 12px; font-size: 15px; }
.pd-features { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 8px; }
.pd-features span { font-size: 13px; color: var(--blue-700); background: var(--blue-100); padding: 4px 12px; border-radius: 999px; font-weight: 700; }

.spec-table { margin-top: 20px; width: 100%; border-collapse: collapse; table-layout: fixed; font-size: 14px; }
.spec-table col:first-child { width: 32%; }
.spec-table col:nth-child(2) { width: 68%; }
.spec-table th, .spec-table td { border: 1px solid var(--line); padding: 10px 14px; text-align: left; }
.spec-table th { background: var(--bg-soft); color: var(--ink); font-weight: 700; width: 32%; }

/* ==========================================================================
   应用领域
   ========================================================================== */

.app-section { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: center; padding: 56px 0; border-bottom: 1px solid var(--line); }
.app-section:last-child { border-bottom: none; }
.app-section:nth-child(even) .app-img { order: 2; }
.app-img { border-radius: var(--radius); overflow: hidden; }
.app-img img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.app-no { font-size: 44px; font-weight: 700; color: var(--blue-100); line-height: 1; }
.app-title { font-size: 24px; font-weight: 700; color: var(--ink); margin: 8px 0 10px; }
.app-desc { font-size: 15px; }
.app-solutions { margin-top: 16px; display: grid; gap: 8px; }
.app-solutions li { display: flex; gap: 10px; font-size: 14px; color: var(--text); }
.app-solutions li::before { content: ''; flex: none; width: 6px; height: 6px; border-radius: 50%; background: var(--green-600); margin-top: 9px; }

/* ==========================================================================
   新闻
   ========================================================================== */

.news-list { display: grid; gap: 20px; }
.news-item { display: grid; grid-template-columns: 280px 1fr; gap: 28px; padding: 22px; }
.news-item .card-img { aspect-ratio: 16 / 10; border-radius: 8px; }
.news-item:hover { transform: translateY(-2px); }
.news-item-title { font-size: 20px; font-weight: 700; color: var(--ink); }
.news-item-title:hover { color: var(--blue-700); }
.news-item-desc { margin-top: 8px; font-size: 14px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* 新闻详情 */
.article { max-width: 860px; margin: 0 auto; }
.article-head { text-align: center; padding: 0 0 30px; border-bottom: 1px solid var(--line); }
.article-head h1 { font-size: 30px; color: var(--ink); line-height: 1.4; }
.article-meta { margin-top: 16px; display: flex; justify-content: center; gap: 18px; font-size: 14px; color: var(--muted); }
.article-img { margin: 32px 0; border-radius: var(--radius); overflow: hidden; }
.article-img img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.article-body p { margin-bottom: 18px; font-size: 16px; }
.article-body h3 { font-size: 20px; color: var(--ink); margin: 26px 0 12px; }
.article-nav { display: flex; justify-content: space-between; gap: 20px; margin-top: 44px; padding-top: 26px; border-top: 1px solid var(--line); }
.article-nav a { font-size: 14px; color: var(--blue-700); font-weight: 700; max-width: 46%; }
.article-nav a:hover { color: var(--blue-500); }
.article-nav .next { text-align: right; }

/* ==========================================================================
   联系我们
   ========================================================================== */

.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.contact-card { padding: 30px 22px; text-align: center; }
.contact-icon { width: 56px; height: 56px; margin: 0 auto 16px; border-radius: 50%; background: var(--blue-100); color: var(--blue-700); display: flex; align-items: center; justify-content: center; }
.contact-card:nth-child(2n) .contact-icon { background: var(--green-100); color: var(--green-600); }
.contact-icon svg { width: 24px; height: 24px; }
.contact-label { font-size: 14px; color: var(--muted); }
.contact-value { margin-top: 6px; font-size: 17px; font-weight: 700; color: var(--ink); word-break: break-all; }
.contact-value a:hover { color: var(--blue-700); }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.step-card { position: relative; padding: 30px 26px; background: var(--bg); border: 1px solid var(--line); border-radius: var(--radius); }
.step-no { font-size: 34px; font-weight: 700; color: var(--blue-100); line-height: 1; }
.step-title { margin-top: 10px; font-size: 17px; font-weight: 700; color: var(--ink); }
.step-desc { margin-top: 6px; font-size: 14px; color: var(--muted); }

/* ==========================================================================
   页脚
   ========================================================================== */

.footer { background: var(--blue-950); color: rgba(255, 255, 255, 0.72); font-size: 14px; }
.footer-main { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.3fr; gap: 48px; padding: 64px 0 48px; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; font-weight: 700; }
.footer-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.footer-logo img { height: 40px; }
.footer-brand p { line-height: 1.9; max-width: 320px; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { transition: color .2s; }
.footer-links a:hover { color: #fff; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 12px; align-items: flex-start; }
.footer-contact svg { flex: none; width: 16px; height: 16px; margin-top: 4px; color: #7fc4ef; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.12); padding: 20px 0; text-align: center; font-size: 13px; color: rgba(255, 255, 255, 0.5); }

/* ==========================================================================
   滚动揭示（克制：仅轻微上移淡入）
   ========================================================================== */

.rv { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.rv.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .rv { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ==========================================================================
   响应式
   ========================================================================== */

@media (max-width: 1024px) {
  .feature-grid, .mv-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid, .app-grid, .news-grid, .cert-list, .contact-grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .strength, .about-intro { grid-template-columns: 1fr; gap: 40px; }
  .product-detail, .app-section { grid-template-columns: 1fr; gap: 32px; }
  .product-detail:nth-child(even) .pd-img, .app-section:nth-child(even) .app-img { order: 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat + .stat { border-left: none; }
}

@media (max-width: 768px) {
  .sec { padding: 56px 0; }
  .sec-title { font-size: 26px; }
  .hero { min-height: 520px; }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 15px; }
  .topbar-right { display: none; }
  .topbar-inner { justify-content: center; }

  .nav { position: fixed; inset: 0; background: #fff; flex-direction: column; justify-content: center; gap: 8px; opacity: 0; pointer-events: none; transition: opacity .25s; z-index: 200; }
  .nav.open { opacity: 1; pointer-events: auto; }
  .nav a { font-size: 20px; padding: 12px 24px; }
  .nav-cta { margin: 12px 0 0; }
  .nav-toggle { display: block; position: relative; z-index: 210; }
  .nav-toggle svg { width: 26px; height: 26px; }
  .nav-close { display: block; position: absolute; top: 22px; right: 22px; }
  body.menu-open { overflow: hidden; }

  .feature-grid, .mv-grid, .product-grid, .app-grid, .news-grid, .cert-list, .contact-grid, .steps { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .timeline { grid-template-columns: 1fr; }
  .tl-time { text-align: left; padding-bottom: 0; }
  .tl-axis { display: none; }
  .tl-item { position: relative; padding-left: 24px; border-left: 2px solid var(--line); padding-bottom: 8px; }
  .tl-item::before { content: ''; position: absolute; left: -8px; top: 8px; width: 14px; height: 14px; border-radius: 50%; background: var(--blue-500); box-shadow: 0 0 0 4px var(--blue-100); }
  .tl-content { padding: 6px 0 26px 0; }
  .news-item { grid-template-columns: 1fr; gap: 16px; }
  .news-item .card-img { aspect-ratio: 16 / 9; }
  .article-head h1 { font-size: 24px; }
  .cta-inner { padding: 40px 0; }
  .footer-main { grid-template-columns: 1fr; gap: 36px; }
  .spec-table { font-size: 13px; }
  .spec-table th, .spec-table td { padding: 8px 10px; }
}