/* ==========================================================================
   湖南亦兮科技有限公司 · 官网样式
   静态站点 · JSON 数据驱动
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  /* 品牌色：深海蓝 + 安全橙 */
  --brand:        #0e2a47;
  --brand-700:    #0a2038;
  --brand-600:    #163a5f;
  --brand-100:    #e8eef5;
  --brand-050:    #f4f7fb;

  --accent:       #f26b21;
  --accent-600:   #d9550f;
  --accent-100:   #fff1e8;

  /* 文本 */
  --ink:          #14202e;
  --ink-2:        #33445a;
  --muted:        #64748b;
  --muted-2:      #94a3b8;

  /* 面与线 */
  --bg:           #ffffff;
  --bg-soft:      #f5f7fa;
  --bg-soft-2:    #eef2f7;
  --line:         #e3e8ef;
  --line-soft:    #eef1f6;

  /* 语义 */
  --ok:           #0f9d58;
  --shadow-xs:    0 1px 2px rgba(16, 34, 56, .05);
  --shadow-sm:    0 2px 8px rgba(16, 34, 56, .06);
  --shadow-md:    0 8px 24px rgba(16, 34, 56, .09);
  --shadow-lg:    0 18px 48px rgba(16, 34, 56, .13);

  --radius-sm:    8px;
  --radius:       14px;
  --radius-lg:    20px;

  --maxw:         1200px;
  --header-h:     68px;

  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC",
          "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5 { margin: 0; font-weight: 700; line-height: 1.3; letter-spacing: -.01em; }
p { margin: 0; }
button, input, textarea, select { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- 3. 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  height: 100%;
  display: flex; align-items: center; gap: 32px;
}
.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--brand-600), var(--brand));
  display: grid; place-items: center; color: #fff; flex-shrink: 0;
}
.brand-mark svg { width: 19px; height: 19px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-name { font-size: 16px; font-weight: 700; letter-spacing: .01em; color: var(--brand); }
.brand-en { font-size: 10px; color: var(--muted-2); letter-spacing: .16em; text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a {
  position: relative;
  padding: 8px 14px; border-radius: var(--radius-sm);
  font-size: 15px; color: var(--ink-2); font-weight: 500;
  transition: color .18s ease, background .18s ease;
}
.nav a:hover { color: var(--brand); background: var(--brand-050); }
.nav a.is-active { color: var(--brand); font-weight: 600; }
.nav a.is-active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 1px;
  height: 2px; border-radius: 2px; background: var(--accent);
}

.header-cta {
  display: inline-flex; align-items: center; gap: 7px;
  margin-left: 12px; padding: 9px 18px;
  background: var(--accent); color: #fff; font-size: 14px; font-weight: 600;
  border-radius: 999px; transition: background .18s ease, transform .18s ease;
}
.header-cta:hover { background: var(--accent-600); transform: translateY(-1px); }
/* IoT 云平台登录按钮：描边次要样式，与「获取方案」实心按钮区分 */
.header-cta--iot {
  background: transparent; color: var(--brand);
  box-shadow: inset 0 0 0 1.5px var(--brand-300, #b9cde4);
}
.header-cta--iot:hover { background: var(--brand-050, #eef4fa); transform: translateY(-1px); }

.nav-toggle {
  display: none; margin-left: 10px; width: 40px; height: 40px; flex-shrink: 0;
  border: 1px solid var(--line); border-radius: 10px; background: #fff; cursor: pointer;
  align-items: center; justify-content: center;
}
.nav-toggle span {
  display: block; width: 18px; height: 1.5px; background: var(--ink);
  position: relative; transition: background .2s;
}
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 18px; height: 1.5px; background: var(--ink);
  transition: transform .2s ease;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after  { top: 6px; }
body.nav-open .nav-toggle span { background: transparent; }
body.nav-open .nav-toggle span::before { transform: translateY(6px) rotate(45deg); }
body.nav-open .nav-toggle span::after  { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 4. 通用区块 ---------- */
.section { padding: 88px 0; }
.section--soft { background: var(--bg-soft); }
.section--tight { padding: 56px 0; }

.section-head { max-width: 720px; margin-bottom: 48px; }
.section-head--center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: .08em;
  color: var(--accent); text-transform: uppercase; margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--accent); border-radius: 2px; }
.section-head--center .eyebrow::before { display: none; }
.section-title { font-size: clamp(26px, 3.4vw, 36px); color: var(--brand); }
.section-desc { margin-top: 16px; font-size: 16.5px; color: var(--muted); }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px; border: 1px solid transparent;
  font-size: 15px; font-weight: 600; cursor: pointer;
  transition: all .18s ease; white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; }
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-600); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(242, 107, 33, .28); }
.btn--ghost { background: #fff; color: var(--brand); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--brand); color: var(--brand); transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.btn--light { background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.32); }
.btn--light:hover { background: rgba(255,255,255,.2); }
.btn--lg { padding: 15px 34px; font-size: 16px; }

/* ---------- 6. 首屏 Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(150deg, var(--brand-700) 0%, var(--brand) 46%, #1b4468 100%);
  color: #fff; padding: 96px 0 112px;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 70% at 70% 30%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 70% 30%, #000 40%, transparent 100%);
}
.hero::after {
  content: ""; position: absolute; right: -140px; top: -120px;
  width: 620px; height: 620px; border-radius: 50%;
  background: radial-gradient(circle, rgba(242,107,33,.30), transparent 62%);
}
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 15px; border-radius: 999px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22);
  font-size: 13.5px; letter-spacing: .02em; margin-bottom: 26px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 0 4px rgba(74,222,128,.22); }
.hero h1 { font-size: clamp(32px, 4.6vw, 52px); line-height: 1.22; letter-spacing: -.02em; }
.hero h1 em { font-style: normal; color: #ffb083; }
.hero-lead { margin-top: 22px; font-size: 17.5px; line-height: 1.8; color: rgba(255,255,255,.82); max-width: 560px; }
.hero-actions { margin-top: 38px; display: flex; flex-wrap: wrap; gap: 14px; }

.hero-panel {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius-lg); padding: 26px;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 24px 60px rgba(0,0,0,.24);
}
.hero-panel h3 { font-size: 14px; font-weight: 600; letter-spacing: .1em; color: rgba(255,255,255,.62); margin-bottom: 18px; }
.hero-stat { display: flex; align-items: baseline; gap: 8px; padding: 13px 0; border-top: 1px solid rgba(255,255,255,.11); }
.hero-stat:first-of-type { border-top: 0; }
.hero-stat .num { font-size: 30px; font-weight: 700; letter-spacing: -.02em; }
.hero-stat .unit { font-size: 14px; color: #ffb083; font-weight: 600; }
.hero-stat .label { margin-left: auto; font-size: 14px; color: rgba(255,255,255,.72); text-align: right; }

/* ---------- 6.1 可选大图背景（放入 assets/img/hero.jpg 后自动生效） ---------- */
.hero.has-photo { background-size: cover; background-position: center; }
.hero.has-photo::before {
  background-image: none;
  background-color: rgba(10, 32, 56, .74);
  mask-image: none; -webkit-mask-image: none;
}
.hero.has-photo::after { display: none; }

.about-photo {
  border-radius: var(--radius-lg); overflow: hidden;
  min-height: 320px; background-size: cover; background-position: center;
}
.about-photo:not(.has-photo) {
  background: linear-gradient(150deg, var(--brand-050), #e4ecf6);
  display: grid; place-items: center;
}

/* ---------- 7. 数据条 ---------- */
.facts { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: -56px; position: relative; z-index: 5; }
.fact {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease;
}
.fact:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.fact-value { font-size: 34px; font-weight: 700; color: var(--brand); letter-spacing: -.02em; line-height: 1.1; }
.fact-value .u { font-size: 15px; font-weight: 600; color: var(--accent); margin-left: 3px; }
.fact-label { margin-top: 6px; font-size: 15px; font-weight: 600; color: var(--ink); }
.fact-desc { margin-top: 8px; font-size: 13.5px; color: var(--muted); line-height: 1.6; }

/* ---------- 8. 卡片网格 ---------- */.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--5 { grid-template-columns: repeat(5, 1fr); }

.card {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: #cfd9e5; }
.card-icon {
  width: 46px; height: 46px; border-radius: 12px;
  background: var(--brand-050); color: var(--brand-600);
  display: grid; place-items: center; margin-bottom: 18px;
}
.card-icon svg { width: 23px; height: 23px; }
.card h3 { font-size: 18px; color: var(--brand); }
.card p { margin-top: 10px; font-size: 14.5px; color: var(--muted); line-height: 1.7; }
.card-link {
  margin-top: 18px; display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 600; color: var(--accent);
}
.card-link svg { width: 15px; height: 15px; transition: transform .2s ease; }
.card:hover .card-link svg { transform: translateX(4px); }

/* 产品卡 */
.product-card { padding: 0; overflow: hidden; cursor: pointer; }
.product-thumb {
  height: 168px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--brand-050), #e6edf6);
  color: var(--brand-600); border-bottom: 1px solid var(--line-soft);
  transition: background .25s ease;
}
.product-card:hover .product-thumb { background: linear-gradient(135deg, #e6edf6, #dde8f4); }
.product-thumb svg { width: 62px; height: 62px; opacity: .92; }
.product-body { padding: 22px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.product-tag {
  align-self: flex-start; font-size: 12px; font-weight: 600; letter-spacing: .03em;
  padding: 4px 10px; border-radius: 999px;
  background: var(--accent-100); color: var(--accent-600); margin-bottom: 12px;
}
.product-name { font-size: 17px; color: var(--brand); line-height: 1.45; }
.product-tagline { margin-top: 6px; font-size: 13.5px; font-weight: 500; color: var(--accent-600); }
.product-summary {
  margin-top: 12px; font-size: 14px; color: var(--muted); line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
/* 真实产品图：object-fit: contain 保证设备照片不被裁切。
   img 必须绝对定位：否则 height:100% 在 grid 自动行内失效，
   图片会按原始高度溢出 168px 容器、盖住卡片正文里的产品名称 */
.product-thumb { position: relative; overflow: hidden; }
.product-thumb img {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: contain;
  padding: 12px; background: #fff; display: block;
}
.product-thumb .thumb-icon { display: grid; place-items: center; width: 100%; height: 100%; }
/* 缩略图底部产品名称浮层 */
.product-thumb .thumb-name {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 2;
  padding: 22px 14px 9px; font-size: 13.5px; font-weight: 600; line-height: 1.4;
  color: #fff; text-align: center; pointer-events: none;
  background: linear-gradient(180deg, rgba(11,31,54,0) 0%, rgba(11,31,54,.78) 60%);
  text-shadow: 0 1px 2px rgba(0,0,0,.35);
}
.product-thumb.has-img .thumb-icon { display: none; }
.product-thumb:not(.has-img) img { display: none; }
.product-card:hover .product-thumb img { transform: scale(1.03); }
.product-thumb img { transition: transform .3s ease; }

.detail-visual { position: relative; overflow: hidden; }
.detail-visual img {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: contain; padding: 22px; background: #fff;
}
.detail-visual .thumb-icon { display: grid; place-items: center; }
.detail-visual.has-img .thumb-icon { display: none; }
.detail-visual:not(.has-img) img { display: none; }

/* 详情页图集 */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.gallery-item {
  display: block; aspect-ratio: 4 / 3; border: 1px solid var(--line);
  border-radius: var(--radius-sm); overflow: hidden; background: #fff;
  transition: box-shadow .2s ease, transform .2s ease;
}
.gallery-item:hover { box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.gallery-item img { width: 100%; height: 100%; object-fit: contain; padding: 10px; }
@media (max-width: 640px) { .gallery { grid-template-columns: repeat(2, 1fr); } }

.product-highlights { margin-top: 16px; display: flex; flex-direction: column; gap: 7px; }
.product-highlights li {
  display: flex; gap: 8px; font-size: 13.5px; color: var(--ink-2); line-height: 1.55;
}
.product-highlights svg { width: 15px; height: 15px; flex-shrink: 0; margin-top: 4px; color: var(--ok); }
.product-foot {
  margin-top: auto; padding-top: 18px; display: flex; align-items: center; justify-content: space-between;
  font-size: 14px; font-weight: 600; color: var(--brand-600);
}
.product-foot .arrow { transition: transform .2s ease; }
.product-card:hover .product-foot .arrow { transform: translateX(4px); }

/* ---------- 9. 解决方案 ---------- */
.solution {
  display: grid; grid-template-columns: 300px 1fr; gap: 0;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff;
}
.solution + .solution { margin-top: 20px; }
.solution-side { padding: 30px 28px; background: var(--brand-050); border-right: 1px solid var(--line-soft); }
.solution-side .idx { font-size: 13px; font-weight: 700; color: var(--accent); letter-spacing: .1em; }
.solution-side h3 { margin-top: 10px; font-size: 20px; color: var(--brand); }
.solution-side .scene { margin-top: 14px; font-size: 13.5px; color: var(--muted); line-height: 1.65; }
.solution-main { padding: 30px 32px; }
.solution-row { display: flex; gap: 14px; }
.solution-row + .solution-row { margin-top: 18px; padding-top: 18px; border-top: 1px dashed var(--line); }
.solution-row .tag {
  flex-shrink: 0; width: 62px; font-size: 12.5px; font-weight: 700; color: var(--brand-600);
}
.solution-row .tag.pain { color: #c2410c; }
.solution-row .tag.value { color: var(--ok); }
.solution-row p { font-size: 14.5px; color: var(--ink-2); line-height: 1.75; }
.solution-products { margin-top: 20px; display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 13px; border-radius: 999px; font-size: 13px; font-weight: 500;
  background: #fff; border: 1px solid var(--line); color: var(--brand-600);
  transition: all .18s ease;
}
.chip:hover { border-color: var(--brand-600); background: var(--brand-050); }
.chip svg { width: 13px; height: 13px; }

/* ---------- 10. 筛选栏 ---------- */
.filter-bar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  padding: 16px; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-xs); margin-bottom: 12px;
  position: sticky; top: calc(var(--header-h) + 12px); z-index: 20;
}
.filter-btn {
  padding: 8px 17px; border-radius: 999px; border: 1px solid var(--line);
  background: #fff; font-size: 14px; font-weight: 500; color: var(--ink-2); cursor: pointer;
  transition: all .18s ease;
}
.filter-btn:hover { border-color: var(--brand-600); color: var(--brand-600); }
.filter-btn.is-active { background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 600; }
.filter-btn .count { opacity: .62; margin-left: 5px; font-size: 12.5px; }

.search-box { position: relative; margin-left: auto; min-width: 240px; }
.search-box svg { position: absolute; left: 13px; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; color: var(--muted-2); }
.search-box input {
  width: 100%; padding: 9px 14px 9px 38px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--bg-soft); font-size: 14px;
  transition: border-color .18s, background .18s;
}
.search-box input:focus { outline: none; border-color: var(--brand-600); background: #fff; }

.result-meta { font-size: 14px; color: var(--muted); margin-bottom: 26px; }
.empty-state {
  padding: 72px 24px; text-align: center; border: 1px dashed var(--line); border-radius: var(--radius);
  background: var(--bg-soft); color: var(--muted);
}
.empty-state svg { width: 44px; height: 44px; margin: 0 auto 16px; color: var(--muted-2); }

/* ---------- 10.5 内页页头 ---------- */
.page-head {
  position: relative; overflow: hidden;
  background: linear-gradient(140deg, var(--brand-700), var(--brand-600) 58%, #1d4d75);
  color: #fff; padding: 40px 0 68px;
}
.page-head::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 100% at 80% 0%, #000 30%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 70% 100% at 80% 0%, #000 30%, transparent 100%);
}
.page-head > .container { position: relative; z-index: 2; }
.page-head h1 { font-size: clamp(28px, 3.8vw, 42px); margin-top: 12px; }
.page-head .lead { margin-top: 16px; font-size: 17px; color: rgba(255,255,255,.82); max-width: 660px; line-height: 1.8; }
.page-head .breadcrumb { color: rgba(255,255,255,.62); padding-top: 0; }
.page-head .breadcrumb a:hover { color: #fff; }
.page-head .breadcrumb .sep { color: rgba(255,255,255,.35); }

/* ---------- 11. 产品详情 ---------- */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--muted); padding: 22px 0 0; }
.breadcrumb a:hover { color: var(--brand-600); }
.breadcrumb .sep { color: var(--muted-2); }

.detail-head { display: grid; grid-template-columns: 1fr 420px; gap: 52px; align-items: start; padding: 34px 0 56px; }
.detail-eyebrow {
  display: inline-flex; align-items: center; gap: 7px; font-size: 13px; font-weight: 600;
  color: var(--accent); margin-bottom: 14px;
}
.detail-title { font-size: clamp(26px, 3.2vw, 38px); color: var(--brand); line-height: 1.28; }
.detail-tagline { margin-top: 12px; font-size: 17px; font-weight: 500; color: var(--accent-600); }
.detail-summary { margin-top: 20px; font-size: 16.5px; line-height: 1.85; color: var(--ink-2); }
.detail-highlights { margin-top: 26px; display: grid; gap: 11px; }
.detail-highlights li { display: flex; gap: 11px; font-size: 15px; color: var(--ink-2); }
.detail-highlights svg { width: 18px; height: 18px; flex-shrink: 0; margin-top: 4px; color: var(--ok); }
.detail-actions { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 12px; }

.detail-visual {
  background: linear-gradient(150deg, var(--brand-050), #e4ecf6);
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  height: 320px; display: grid; place-items: center; color: var(--brand-600);
}
.detail-visual svg { width: 130px; height: 130px; }

.spec-table { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #fff; }
.spec-row { display: grid; grid-template-columns: 210px 1fr; border-bottom: 1px solid var(--line-soft); }
.spec-row:last-child { border-bottom: 0; }
.spec-row:nth-child(odd) { background: var(--bg-soft); }
.spec-row dt { padding: 15px 22px; font-size: 14.5px; font-weight: 600; color: var(--ink-2); }
.spec-row dd { padding: 15px 22px; margin: 0; font-size: 14.5px; color: var(--ink); border-left: 1px solid var(--line-soft); }

/* 相关产品 */
.related { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

/* ---------- 12. 关于我们 ---------- */
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 8px; bottom: 8px; width: 2px; background: var(--line); }
.timeline-item { position: relative; padding-bottom: 32px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: ""; position: absolute; left: -30px; top: 7px; width: 14px; height: 14px;
  border-radius: 50%; background: #fff; border: 3px solid var(--accent);
}
.timeline-item h4 { font-size: 17px; color: var(--brand); }
.timeline-item p { margin-top: 8px; font-size: 14.5px; color: var(--muted); }

.value-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }

/* ---------- 13. 联系我们 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 460px; gap: 48px; align-items: start; }
.contact-card {
  display: flex; gap: 18px; padding: 24px; border: 1px solid var(--line);
  border-radius: var(--radius); background: #fff; transition: box-shadow .2s, transform .2s;
}
.contact-card:hover { box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.contact-card .ci {
  width: 44px; height: 44px; flex-shrink: 0; border-radius: 11px;
  background: var(--accent-100); color: var(--accent-600); display: grid; place-items: center;
}
.contact-card .ci svg { width: 21px; height: 21px; }
.contact-card h4 { font-size: 15px; color: var(--brand); }
.contact-card .cv { margin-top: 6px; font-size: 17px; font-weight: 600; color: var(--ink); }
.contact-card .cn { margin-top: 4px; font-size: 13.5px; color: var(--muted); }

.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 34px; box-shadow: var(--shadow-sm); }
.form-card h3 { font-size: 20px; color: var(--brand); }
.form-card .sub { margin-top: 8px; font-size: 14px; color: var(--muted); margin-bottom: 24px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; font-weight: 600; color: var(--ink-2); margin-bottom: 7px; }
.field label .req { color: var(--accent); }
.field input, .field textarea, .field select {
  width: 100%; padding: 11px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg-soft); font-size: 14.5px; transition: border-color .18s, background .18s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--brand-600); background: #fff;
}
.field textarea { resize: vertical; min-height: 110px; }
.form-note { margin-top: 14px; font-size: 12.5px; color: var(--muted-2); line-height: 1.6; }
.form-msg { margin-top: 16px; padding: 12px 15px; border-radius: 10px; font-size: 14px; display: none; }
.form-msg.show { display: block; }
.form-msg.ok { background: #e8f7ee; color: var(--ok); border: 1px solid #b9e5c9; }
.form-msg.err { background: #fdecec; color: #c0392b; border: 1px solid #f5c6c6; }

/* ---------- 14. CTA 条 ---------- */
.cta-band {
  position: relative; overflow: hidden;
  background: linear-gradient(120deg, var(--brand-700), var(--brand-600) 55%, #1d4d75);
  color: #fff; border-radius: var(--radius-lg); padding: 56px 52px;
  display: flex; align-items: center; justify-content: space-between; gap: 36px; flex-wrap: wrap;
}
.cta-band::after {
  content: ""; position: absolute; right: -80px; bottom: -140px; width: 380px; height: 380px;
  border-radius: 50%; background: radial-gradient(circle, rgba(242,107,33,.26), transparent 65%);
}
.cta-band > * { position: relative; z-index: 2; }
.cta-band h2 { font-size: clamp(24px, 3vw, 32px); }
.cta-band p { margin-top: 12px; font-size: 16px; color: rgba(255,255,255,.8); max-width: 560px; }

/* ---------- 15. 页脚 ---------- */
.site-footer { background: var(--brand-700); color: rgba(255,255,255,.72); padding: 60px 0 0; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 44px; }
.footer-brand .brand-name { color: #fff; }
.footer-brand .brand-mark { background: rgba(255,255,255,.14); }
.footer-brand .brand-en { color: rgba(255,255,255,.5); }
.footer-brand p { margin-top: 16px; font-size: 14px; line-height: 1.75; max-width: 320px; }
.footer-col h5 { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 16px; letter-spacing: .02em; }
.footer-col li + li { margin-top: 10px; }
.footer-col a { font-size: 14px; transition: color .18s; }
.footer-col a:hover { color: #fff; }
.footer-contact li { font-size: 14px; display: flex; gap: 9px; align-items: flex-start; }
.footer-contact svg { width: 15px; height: 15px; margin-top: 4px; flex-shrink: 0; opacity: .6; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.12); padding: 20px 0;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px;
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-panel { max-width: 520px; }
  .detail-head { grid-template-columns: 1fr; gap: 36px; }
  .detail-visual { height: 240px; order: -1; }
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .form-card { max-width: 560px; }
  .facts { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--5 { grid-template-columns: repeat(3, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .related { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 860px) {
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 12px 16px 20px; margin: 0;
    transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
    box-shadow: var(--shadow-md); max-height: calc(100vh - var(--header-h)); overflow-y: auto;
  }
  body.nav-open .nav { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { padding: 12px 14px; font-size: 16px; }
  .nav a.is-active::after { display: none; }
  .nav a.is-active { background: var(--brand-050); }
  .header-cta { margin-left: auto; }
  .nav-toggle { display: flex; }
  .header-inner { gap: 14px; }
  .solution { grid-template-columns: 1fr; }
  .solution-side { border-right: 0; border-bottom: 1px solid var(--line-soft); }
  .section { padding: 64px 0; }
  .filter-bar { position: static; }
  .search-box { margin-left: 0; width: 100%; }
}

@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .hero { padding: 64px 0 80px; }
  .facts { grid-template-columns: 1fr; margin-top: -40px; }
  .grid--2, .grid--3, .grid--4, .grid--5, .related, .value-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .spec-row { grid-template-columns: 1fr; }
  .spec-row dd { border-left: 0; border-top: 1px solid var(--line-soft); }
  .cta-band { padding: 38px 26px; }
  .header-cta { display: none; }
  .section-head { margin-bottom: 32px; }
}

/* ---------- 17. 动画 ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- SEO noscript 兜底（仅禁用 JS 时可见） ---------- */
.seo-noscript { padding: 40px 0; max-width: 900px; margin: 0 auto; }
.seo-noscript h2 { font-size: 22px; margin: 18px 0 10px; }
.seo-noscript h3 { font-size: 17px; margin: 14px 0 8px; }
.seo-noscript p, .seo-noscript li { font-size: 14px; line-height: 1.8; color: #374151; }

/* ---------- 常见问题（FAQ，首页可见内容 + FAQPage 结构化数据） ---------- */
.faq-list { max-width: 900px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0 22px; transition: border-color .2s ease, box-shadow .2s ease;
}
.faq-item[open] { border-color: var(--brand-300, #b9cde6); box-shadow: 0 8px 24px rgba(15, 40, 70, .06); }
.faq-item summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 18px 0; font-size: 16px; font-weight: 600; color: var(--brand);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-ic { width: 18px; height: 18px; flex-shrink: 0; color: var(--accent-600); transition: transform .25s ease; }
.faq-item[open] .faq-ic { transform: rotate(45deg); }
.faq-a { padding: 0 0 18px; font-size: 14.5px; line-height: 1.85; color: var(--muted); }