/* ===========================================================
   万年县丛塑新材料有限公司 · 企业官网
   设计系统 / 共享样式
   风格：简约大气 · 现代专业
   =========================================================== */

:root {
  /* 主色 —— 深海蓝青，呼应弹性体材料的科技与环保属性 */
  --primary: #0e4d64;
  --primary-dark: #0a3647;
  --primary-light: #e6f1f4;
  --accent: #f2a541;        /* 琥珀金，用于强调与按钮 */
  --accent-dark: #d98c25;

  --bg: #ffffff;
  --bg-soft: #f5f8fa;
  --bg-dark: #0a3647;

  --text: #1d2b32;
  --text-soft: #51606a;
  --text-muted: #84939d;
  --border: #e3eaee;

  /* 兼容性变量（部分页面引用但此前未定义） */
  --card: #ffffff;
  --muted: #84939d;
  --shadow: 0 2px 8px rgba(14, 77, 100, 0.06);

  --shadow-sm: 0 2px 8px rgba(14, 77, 100, 0.06);
  --shadow-md: 0 10px 30px rgba(14, 77, 100, 0.10);
  --shadow-lg: 0 20px 50px rgba(14, 77, 100, 0.16);

  --radius: 14px;
  --radius-sm: 8px;
  --maxw: 1200px;
  --nav-h: 72px;

  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ---------- Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 999px;
  font-size: 15px; font-weight: 600; cursor: pointer;
  border: 1.5px solid transparent; transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #3a2700; }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; border-color: #fff; color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.12); }
.btn-ghost { background: var(--primary-light); color: var(--primary); }
.btn-ghost:hover { background: #d6e8ed; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; height: var(--nav-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100; transition: box-shadow .3s ease;
}
.nav.scrolled { box-shadow: var(--shadow-sm); }
.nav .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; font-size: 18px; color: var(--primary-dark); }
.brand-logo {
  width: 40px; height: 40px; border-radius: 10px;
  object-fit: contain;
  box-shadow: var(--shadow-sm);
  background: #fff;
}
.brand span { color: #b8860b; text-shadow: 0 1px 2px rgba(184,134,11,.18); }
.brand small { display: block; font-size: 11px; font-weight: 500; color: var(--text-muted); letter-spacing: .5px; }
.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links a { font-size: 15px; color: var(--text-soft); font-weight: 500; position: relative; transition: color .2s; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; height: 2px; width: 0;
  background: var(--accent); transition: width .25s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; flex-direction: column; gap: 5px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--primary); border-radius: 2px; transition: .3s; }

/* ---------- Hero ---------- */
.hero {
  position: relative; padding: calc(var(--nav-h) + 90px) 0 110px;
  background: linear-gradient(160deg, var(--primary-dark), #0c4760 60%, #0a3647);
  background-size: cover;
  background-position: center;
  color: #fff; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(8,40,55,.80) 0%, rgba(10,54,71,.62) 50%, rgba(8,40,55,.82) 100%);
  z-index: 1;
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 28px 28px; opacity: .5;
  z-index: 1;
}
.hero .container { position: relative; z-index: 2; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; align-items: center; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 16px; border-radius: 999px;
  background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.18);
  font-size: 13px; letter-spacing: .5px; margin-bottom: 22px;
}
.hero-tag .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.hero h1 { font-size: 46px; line-height: 1.2; font-weight: 800; letter-spacing: -0.5px; }
.hero h1 .hl { color: var(--accent); }
.hero p.lead { margin: 22px 0 34px; font-size: 18px; color: rgba(255,255,255,.82); max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 36px; margin-top: 48px; }
.hero-stats .num { font-size: 30px; font-weight: 800; color: #fff; }
.hero-stats .lbl { font-size: 13px; color: rgba(255,255,255,.7); }

/* Hero 右侧视觉卡片 */
.hero-card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 20px; padding: 30px; backdrop-filter: blur(6px);
  box-shadow: var(--shadow-lg);
}
.hero-card h3 { font-size: 18px; margin-bottom: 18px; display: flex; align-items: center; gap: 10px; }
.hero-card .chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 14px; border-radius: 10px; background: rgba(255,255,255,.10);
  font-size: 14px; margin: 0 8px 8px 0;
}
.hero-card .chip i { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); display: inline-block; }

/* ---------- 通用区块 ---------- */
.section { padding: 96px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .eyebrow { color: var(--accent-dark); font-weight: 700; font-size: 14px; letter-spacing: 2px; text-transform: uppercase; }
.section-head h2 { font-size: 36px; font-weight: 800; margin: 12px 0 14px; color: var(--primary-dark); letter-spacing: -.5px; }
.section-head p { color: var(--text-soft); font-size: 16px; }

/* ---------- 关于我们 ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-text p { color: var(--text-soft); margin-bottom: 16px; }
.about-text .hl { color: var(--primary); font-weight: 600; }
.about-visual {
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md);
  background: linear-gradient(135deg, #0e4d64, #1b7a98);
  aspect-ratio: 4/3; position: relative; display: grid; place-items: center; color: #fff;
}
.about-visual svg { width: 70%; opacity: .95; }

/* ---------- 优势卡片 ---------- */
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.feature {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px 26px; transition: transform .25s ease, box-shadow .25s ease, border-color .25s;
}
.feature:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.feature .ic {
  width: 52px; height: 52px; border-radius: 14px; background: var(--primary-light);
  display: grid; place-items: center; color: var(--primary); margin-bottom: 18px;
}
.feature .ic svg { width: 26px; height: 26px; }
.feature h3 { font-size: 18px; margin-bottom: 10px; color: var(--primary-dark); }
.feature p { color: var(--text-soft); font-size: 14.5px; }

/* ---------- 产品卡片 ---------- */
.products { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.product {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: transform .25s ease, box-shadow .25s ease;
  display: flex; flex-direction: column;
}
.product:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.product .thumb {
  aspect-ratio: 4 / 3; height: auto; background: linear-gradient(135deg, #0e4d64, #1b7a98);
  display: grid; place-items: center; color: #fff; position: relative; padding: 12px;
}
.product .thumb .badge {
  position: absolute; top: 14px; left: 14px; background: var(--accent); color: #3a2700;
  font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 999px;
}
.product .thumb svg { width: 64px; opacity: .9; }
.product .thumb .emoji { font-size: 54px; line-height: 1; filter: drop-shadow(0 4px 10px rgba(0,0,0,.15)); }
.product .thumb .emoji svg { width: 60px; height: 60px; }
.product .thumb img, .pd-head .thumb img { width: 100%; height: 100%; object-fit: cover; border-radius: 14px; box-shadow: 0 6px 18px rgba(0,0,0,.18); }
.product .body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.product h3 { font-size: 19px; color: var(--primary-dark); margin-bottom: 8px; }
.product p { color: var(--text-soft); font-size: 14.5px; margin-bottom: 16px; flex: 1; }
.product .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.product .tags span {
  font-size: 12px; background: var(--bg-soft); color: var(--text-soft);
  padding: 4px 11px; border-radius: 999px; border: 1px solid var(--border);
}
.product .more { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.product .more:hover { gap: 10px; }

/* ---------- 数据统计条 ---------- */
.stats-band { background: var(--bg-dark); color: #fff; padding: 64px 0; }
.stats-band .grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; }
.stats-band .num { font-size: 40px; font-weight: 800; color: var(--accent); }
.stats-band .lbl { color: rgba(255,255,255,.75); margin-top: 6px; font-size: 15px; }

/* ---------- 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 50px; }
.contact-info h2 { font-size: 32px; color: var(--primary-dark); margin-bottom: 16px; }
.contact-info p { color: var(--text-soft); margin-bottom: 28px; }
.info-list li { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.info-list .ic { width: 44px; height: 44px; flex: none; border-radius: 12px; background: var(--primary-light); color: var(--primary); display: grid; place-items: center; }
.info-list .tt { font-size: 13px; color: var(--text-muted); }
.info-list .vv { font-size: 16px; color: var(--text); font-weight: 600; }

.form-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px; box-shadow: var(--shadow-md);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 8px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  font-family: inherit; font-size: 15px; color: var(--text); background: var(--bg-soft);
  transition: border-color .2s, background .2s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--primary); background: #fff;
}
.field textarea { resize: vertical; min-height: 110px; }
.form-success {
  display: none; background: #e9f7ef; border: 1px solid #b7e4c7; color: #1b7d44;
  padding: 14px 16px; border-radius: var(--radius-sm); margin-bottom: 18px; font-size: 14.5px;
}
.form-success.show { display: block; }

/* ---------- 真实地图 ---------- */
.map-box {
  margin-top: 50px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border);
  height: 380px; background: #eef3f5; position: relative;
}
.map-box iframe { width: 100%; height: 100%; border: 0; display: block; }
.map-pin {
  position: absolute; left: 14px; top: 14px; z-index: 5; background: #fff;
  border-radius: 12px; padding: 10px 14px; box-shadow: 0 4px 14px rgba(0,0,0,.16);
  display: flex; flex-direction: column; gap: 2px; max-width: 240px;
}
.map-pin strong { font-size: 14px; color: var(--primary); }
.map-pin span { font-size: 12px; color: var(--text-soft); }
.map-actions {
  position: absolute; right: 14px; bottom: 14px; display: flex; gap: 10px; z-index: 5;
}
.map-actions a {
  display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600;
  background: #fff; color: var(--primary); padding: 9px 14px; border-radius: 999px;
  text-decoration: none; box-shadow: 0 4px 14px rgba(0,0,0,.18);
}
.map-actions a:hover { background: var(--primary); color: #fff; }
.map-fallback {
  height: 100%; display: grid; place-items: center; text-align: center; color: var(--text-soft);
  font-size: 14px; padding: 20px;
}

/* ---------- 页脚 ---------- */
.footer { background: var(--bg-dark); color: rgba(255,255,255,.7); padding: 60px 0 28px; }
.footer .top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 36px; border-bottom: 1px solid rgba(255,255,255,.12); }
.footer .brand { color: #fff; margin-bottom: 16px; }
.footer .brand span { color: #d4af37; text-shadow: 0 1px 2px rgba(212,175,55,.22); }
.footer .brand small { color: rgba(255,255,255,.6); }
.footer p.desc { font-size: 14px; max-width: 320px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer ul li { margin-bottom: 10px; font-size: 14px; }
.footer ul li a:hover { color: var(--accent); }
.footer .bottom { padding-top: 22px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 13px; color: rgba(255,255,255,.55); }

/* ---------- 视觉图集 ---------- */
.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.gallery-item { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
.gallery-item img { width: 100%; height: 360px; object-fit: cover; transition: transform .4s ease; }
.gallery-item:hover img { transform: scale(1.04); }
.gallery-item figcaption {
  position: absolute; bottom: 0; left: 0; right: 0;
  padding: 22px 24px; background: linear-gradient(transparent, rgba(10,54,71,.85));
  color: #fff; font-weight: 600; font-size: 17px;
}

/* ---------- 滚动进入动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 子页 Hero ---------- */
.hero-sm {
  position: relative;
  background: radial-gradient(1000px 420px at 80% -10%, #1b7a98 0%, transparent 60%),
              linear-gradient(160deg, var(--primary-dark), #0c4760 60%, #0a3647);
  background-size: cover; background-position: center;
  color: #fff; padding: calc(var(--nav-h) + 64px) 0 72px; overflow: hidden;
}
.hero-sm::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(160deg, rgba(8,40,55,.78) 0%, rgba(10,54,71,.58) 55%, rgba(8,40,55,.80) 100%);
  z-index: 1;
}
.hero-sm .container { position: relative; z-index: 2; }
.hero-sm h1 { font-size: 44px; font-weight: 800; margin: 14px 0 12px; }
.hero-sm p { font-size: 18px; opacity: .92; max-width: 720px; }

/* 导航 CTA（桌面显示，移动端隐藏避免与汉堡冲突） */
.nav-cta { padding: 10px 20px; font-size: 14px; margin-left: 16px; }

/* ---------- 应用领域网格 ---------- */
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.app-card {
  background: var(--card); border-radius: var(--radius); padding: 28px 24px;
  box-shadow: var(--shadow); border: 1px solid var(--border);
  transition: transform .25s ease, box-shadow .25s ease;
}
.app-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(14,77,100,.12); }
.app-ic { font-size: 40px; margin-bottom: 14px; color: var(--primary); }
.app-ic svg, .base-ic svg, .rnd-ic svg { width: 40px; height: 40px; }
.app-card h3 { font-size: 19px; color: var(--primary-dark); margin-bottom: 8px; }
.app-card p { font-size: 14px; color: var(--muted); line-height: 1.6; margin-bottom: 14px; }

/* ---------- 资质认证墙 ---------- */
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cert {
  background: var(--card); border-radius: var(--radius); padding: 26px 22px;
  border: 1px solid var(--border); box-shadow: var(--shadow); text-align: center;
}
.cert-badge {
  width: 52px; height: 52px; border-radius: 50%; margin: 0 auto 14px;
  background: rgba(14,77,100,.08); color: var(--primary);
  display: grid; place-items: center;
}
.cert-badge .cert-ico { width: 28px; height: 28px; display: block; }
.cert-name { font-size: 18px; font-weight: 700; color: var(--primary-dark); margin-bottom: 8px; }
.cert-desc { font-size: 14px; color: var(--muted); line-height: 1.6; }

/* ---------- 产品中心（详情 + 规格表） ---------- */
.product-details { display: flex; flex-direction: column; gap: 26px; }
.product-detail {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow);
}
.pd-head { display: flex; gap: 22px; align-items: flex-start; }
.pd-head .thumb {
  width: 96px; height: 96px; border-radius: 16px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary), #1b7a98);
  display: grid; place-items: center; position: relative;
}
.pd-head .thumb .emoji { font-size: 44px; }
.pd-head .thumb .emoji svg { width: 44px; height: 44px; }
.pd-head .thumb .badge {
  position: absolute; top: 8px; left: 8px; background: var(--accent); color: #fff;
  font-size: 12px; padding: 3px 9px; border-radius: 8px;
}
.pd-head-body { flex: 1; }
.pd-cat {
  display: inline-block; background: rgba(14,77,100,.08); color: var(--primary);
  font-size: 12px; padding: 4px 12px; border-radius: 20px; margin-bottom: 8px;
}
.pd-head-body h3 { font-size: 22px; color: var(--primary-dark); margin-bottom: 8px; }
.pd-head-body p { font-size: 15px; color: var(--muted); line-height: 1.6; margin-bottom: 12px; }
.pd-btn { flex-shrink: 0; align-self: center; }

.spec { margin-top: 22px; border-top: 1px dashed var(--border); padding-top: 18px; }
.spec-title { font-size: 14px; font-weight: 700; color: var(--primary-dark); margin-bottom: 12px; letter-spacing: .5px; }
.spec-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.spec-table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 720px; }
.spec-table th, .spec-table td {
  text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); white-space: nowrap;
}
.spec-table thead th { background: var(--primary); color: #fff; font-weight: 600; }
.spec-table tbody tr:nth-child(even) { background: #f7fafc; }
.spec-table tbody tr:hover { background: rgba(242,165,65,.08); }

/* 分类筛选 */
.cat-filter { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.cat-filter button {
  border: 1px solid var(--border); background: var(--card); color: var(--primary-dark);
  padding: 9px 22px; border-radius: 30px; font-size: 14px; cursor: pointer; transition: all .2s ease;
}
.cat-filter button:hover { border-color: var(--primary); }
.cat-filter button.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- 发展历程 ---------- */
.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px; background: var(--border);
}
.timeline-item { position: relative; padding-bottom: 30px; }
.timeline-item:last-child { padding-bottom: 0; }
.tl-dot {
  position: absolute; left: -28px; top: 4px; width: 16px; height: 16px; border-radius: 50%;
  background: var(--accent); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--accent);
}
.tl-year { font-size: 15px; font-weight: 700; color: var(--accent-dark); margin-bottom: 4px; }
.tl-title { font-size: 18px; font-weight: 700; color: var(--primary-dark); margin-bottom: 6px; }
.tl-desc { font-size: 14.5px; color: var(--muted); line-height: 1.6; }

/* ---------- 运营与供应网络 ---------- */
.bases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.base-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow); text-align: center;
}
.base-ic { font-size: 40px; margin-bottom: 12px; color: var(--primary); }
.base-card h4 { font-size: 18px; color: var(--primary-dark); margin-bottom: 8px; }
.base-card p { font-size: 14px; color: var(--muted); line-height: 1.6; }

/* ---------- 研发实力 ---------- */
.rnd-box { display: flex; gap: 22px; align-items: center; }
.rnd-ic { font-size: 48px; flex-shrink: 0; color: var(--primary); }
.rnd-box p { font-size: 16px; color: var(--text); line-height: 1.8; }

/* ---------- 新闻资讯 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px; box-shadow: var(--shadow); display: flex; flex-direction: column;
  transition: transform .25s ease, box-shadow .25s ease;
}
.news-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(14,77,100,.12); }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.news-cat {
  background: rgba(242,165,65,.15); color: var(--accent-dark); font-size: 12px;
  padding: 4px 12px; border-radius: 20px; font-weight: 600;
}
.news-date { font-size: 13px; color: var(--muted); }
.news-card h3 { font-size: 18px; color: var(--primary-dark); margin-bottom: 10px; line-height: 1.4; }
.news-card p { font-size: 14px; color: var(--muted); line-height: 1.7; margin-bottom: 14px; flex: 1; }

/* ---------- CTA 区块 ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--primary-dark), #0c4760);
  color: #fff; border-radius: 20px; padding: 48px 40px; text-align: center;
}
.cta-band h2 { color: #fff; }
.cta-band p { color: rgba(255,255,255,.9); max-width: 640px; margin: 0 auto; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .features { grid-template-columns: repeat(2, 1fr); }
  .products { grid-template-columns: repeat(2, 1fr); }
  .stats-band .grid { grid-template-columns: repeat(2, 1fr); gap: 36px 20px; }
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .footer .top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-links {
    position: fixed; top: var(--nav-h); right: 0; width: 260px; height: calc(100% - var(--nav-h));
    background: #fff; flex-direction: column; align-items: flex-start; gap: 0; padding: 20px;
    box-shadow: var(--shadow-lg); transform: translateX(110%); transition: transform .3s ease;
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { width: 100%; padding: 14px 0; border-bottom: 1px solid var(--border); }
  .nav-toggle { display: flex; }
  .hero h1 { font-size: 34px; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .section { padding: 64px 0; }
  .section-head h2 { font-size: 28px; }
  .features, .products, .gallery { grid-template-columns: 1fr; }
  .gallery-item img { height: 260px; }
  .form-row { grid-template-columns: 1fr; }
  .footer .top { grid-template-columns: 1fr; }

  .nav-cta { display: none; }
  .hero-sm h1 { font-size: 32px; }
  .app-grid, .cert-grid, .bases-grid, .news-grid { grid-template-columns: 1fr; }
  .pd-head { flex-direction: column; align-items: stretch; }
  .pd-btn { align-self: stretch; text-align: center; }
  .product-detail { padding: 20px; }
  .rnd-box { flex-direction: column; align-items: flex-start; }
  .cta-band { padding: 36px 22px; }
}

@media (max-width: 980px) {
  .app-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .bases-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
}