/* ===== RemoteSiliconeCover · 外贸站全局样式 ===== */
:root {
  --bg: #f4f7fc;
  --bg-soft: #e9eef6;
  --panel: rgba(255, 255, 255, 0.75);
  --panel-solid: #ffffff;
  --border: rgba(20, 40, 90, 0.12);
  --border-strong: rgba(20, 40, 90, 0.28);
  --text: #14233f;
  --text-dim: #5c6b85;
  --primary: #2f6df6;
  --cyan: #0ea5e9;
  --violet: #ec4899;
  --glow: 0 0 24px rgba(47, 109, 246, 0.25);
  --radius: 16px;
  --maxw: 1500px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
}

/* 柔光背景 */
body::after {
  content: "";
  position: fixed;
  top: -20%;
  left: 50%;
  width: 70vw;
  height: 70vw;
  transform: translateX(-50%);
  background:
    radial-gradient(circle at 30% 40%, rgba(47, 109, 246, 0.10), transparent 55%),
    radial-gradient(circle at 70% 30%, rgba(236, 72, 153, 0.08), transparent 55%),
    radial-gradient(circle at 55% 70%, rgba(167, 139, 250, 0.08), transparent 55%);
  filter: blur(40px);
  pointer-events: none;
  z-index: 0;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

/* ===== 页头 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; letter-spacing: 0.3px; }
.logo .mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  box-shadow: var(--glow);
  display: grid; place-items: center; color: #04101f; font-weight: 900; font-size: 14px;
}
.logo span { background: linear-gradient(90deg, #14233f, var(--primary)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.logo-img { width: 36px; height: 36px; border-radius: 9px; object-fit: cover; border: 1px solid var(--border-strong); }

.nav-links { display: flex; gap: 30px; }
.nav-links a { color: var(--text-dim); font-weight: 600; transition: color .2s; font-size: 17px; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }

.nav-actions { display: flex; align-items: center; gap: 14px; }
.lang { color: var(--text-dim); font-size: 14px; border: 1px solid var(--border); padding: 6px 12px; border-radius: 999px; cursor: pointer; transition: .2s; }
.lang:hover { border-color: var(--border-strong); color: var(--text); }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px; border-radius: 999px; font-weight: 600; cursor: pointer;
  border: 1px solid var(--border-strong); color: var(--text);
  background: rgba(43, 111, 255, 0.08); transition: .25s; font-size: 15px;
}
.btn:hover { background: rgba(43, 111, 255, 0.2); box-shadow: var(--glow); transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--primary), var(--cyan)); color: #fff; border: none; }
.btn-primary:hover { box-shadow: 0 0 30px rgba(47, 109, 246, 0.45); }
.btn-wa { background: #25d366; color: #fff; border: none; }
.btn-wa:hover { background: #1eb857; box-shadow: 0 0 30px rgba(37, 211, 102, 0.45); }
.btn-lg { padding: 14px 30px; font-size: 16px; }

.menu-toggle { display: none; background: none; border: none; color: var(--text); font-size: 26px; cursor: pointer; }

/* ===== 通用区块 ===== */
section { padding: 88px 0; position: relative; z-index: 1; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.eyebrow {
  display: inline-block; font-size: 13px; letter-spacing: 3px; text-transform: uppercase;
  color: var(--cyan); border: 1px solid var(--border-strong); padding: 5px 14px; border-radius: 999px; margin-bottom: 18px;
}
.section-head h2 { font-size: clamp(28px, 4vw, 44px); line-height: 1.15; margin-bottom: 14px; }
.gradient-text { background: linear-gradient(90deg, #14233f, var(--primary) 55%, var(--violet)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.section-head p { color: var(--text-dim); }

/* ===== Hero ===== */
.hero { padding-top: 116px; padding-bottom: 96px; text-align: center; }
.hero h1 { font-size: clamp(32px, 5.4vw, 60px); line-height: 1.1; margin-bottom: 22px; font-weight: 800; max-width: 920px; margin-left: auto; margin-right: auto; }
.hero p { color: var(--text-dim); font-size: 18px; max-width: 660px; margin: 0 auto 34px; }
.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-orbit {
  position: relative; height: auto; margin: 52px auto 0; max-width: 820px;
  display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
}
.chip {
  border: 1px solid var(--border); background: var(--panel);
  padding: 10px 18px; border-radius: 999px; color: var(--text-dim); font-size: 14px;
  backdrop-filter: blur(8px);
}
.chip b { color: var(--cyan); }

/* Hero 产品图（居中容器，按原图比例完整显示，不裁切、不贴边） */
.hero-figure {
  margin: 48px auto 0;
  width: 100%;
  max-width: 1180px;
  height: auto;
}
.hero-figure img {
  width: 100%; height: auto; object-fit: contain; display: block;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0,0,0,.35);
}

/* ===== 品类浏览器：左侧类目 + 右侧产品 ===== */
.brand-explorer {
  display: flex; gap: 32px; align-items: flex-start;
}
.bx-nav {
  flex: 0 0 260px; list-style: none; margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 4px;
  position: sticky; top: 96px;
}
.bx-nav a {
  display: flex; align-items: center; gap: 12px;
  padding: 11px 14px; border-radius: 10px;
  color: var(--text-dim); font-weight: 600; font-size: 15px;
  border: 1px solid transparent;
  transition: color .15s, background .15s, border-color .15s;
}
.bx-nav a i {
  margin-left: auto; font-style: normal; opacity: 0;
  transition: opacity .15s; color: var(--cyan);
}
.bx-badge {
  width: 26px; height: 26px; border-radius: 8px; flex: none;
  display: grid; place-items: center; font-size: 12px; font-weight: 700;
  background: rgba(34, 211, 238, 0.12); color: var(--cyan);
}
.bx-nav a:hover, .bx-nav a.active {
  color: var(--text);
  background: rgba(34, 211, 238, 0.07);
  border-color: var(--border);
}
.bx-nav a:hover i, .bx-nav a.active i { opacity: 1; }
.bx-nav a.active .bx-badge { background: var(--cyan); color: #04121c; }

.bx-stage { flex: 1; min-width: 0; min-height: 380px; }
.bx-panel {
  display: none;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px; padding: 32px;
}
.bx-panel.active {
  display: block;
  animation: bxFade .22s ease;
}
@keyframes bxFade {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
.bx-panel h3 { font-size: 26px; margin-bottom: 10px; }
.bx-panel > p { color: var(--text-dim); margin-bottom: 4px; }
.bx-models {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin: 22px 0 26px;
}
.bx-models span {
  font-size: 13px; padding: 7px 14px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--text-dim);
  background: rgba(255, 255, 255, 0.02);
}
.bx-products {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
  margin-bottom: 22px;
}
.bx-product {
  display: flex; flex-direction: column;
  padding: 12px; border-radius: 12px;
  border: 1px solid var(--border); background: rgba(255, 255, 255, 0.02);
  transition: border-color .15s, transform .15s;
}
.bx-product:hover { border-color: var(--cyan); transform: translateY(-2px); }
.bx-product img {
  width: 100%; aspect-ratio: 1 / 1; height: auto;
  object-fit: cover; border-radius: 8px; background: #fff;
  margin-bottom: 12px;
}
.bx-product-model {
  font-size: 12px; font-weight: 700; letter-spacing: .04em;
  color: var(--cyan); margin-bottom: 4px;
}
.bx-product-title { font-size: 14px; font-weight: 600; color: var(--text); line-height: 1.4; }
.bx-view {
  margin-top: auto; padding-top: 10px;
  font-size: 13px; font-weight: 600; color: var(--cyan);
}
.bx-empty { color: var(--text-dim); padding: 8px 0 4px; }
@media (max-width: 1100px) {
  .bx-products { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .bx-products { grid-template-columns: 1fr; }
}
.bx-more { color: var(--cyan); font-weight: 600; }
.bx-more:hover { text-decoration: underline; }

/* ===== About: 生产流程图片槽 ===== */
.factory-ph {
  aspect-ratio: 4 / 3;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 10px; text-align: center; padding: 14px;
  background: linear-gradient(135deg, rgba(43,111,255,.10), rgba(139,92,246,.10));
  border: 1px dashed var(--border-strong);
  border-radius: 12px;
  color: var(--text-dim); font-size: 13px; line-height: 1.4;
  margin-bottom: 14px;
}
.factory-ph .ph-ico { font-size: 36px; }
.factory-ph img { width: 100%; height: 100%; object-fit: cover; border-radius: 12px; display: block; }

/* About Us 工厂横幅 */
.factory-banner {
  margin: 28px 0 36px;
  border-radius: 16px; overflow: hidden;
  border: 1px solid var(--border-strong);
  box-shadow: 0 18px 50px rgba(0,0,0,.35);
}
.factory-banner img { width: 100%; height: auto; display: block; }

/* About Us 文案排版 */
.about-copy { max-width: 900px; margin: 0 0 12px; }
.about-copy p { color: var(--text-dim); font-size: 16px; line-height: 1.85; margin: 0 0 18px; }
.about-copy .about-tagline {
  font-size: 22px; font-weight: 700; margin-top: 8px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ===== 产品详情页：主图画廊 + 详情长图 ===== */
.pg-main {
  border-radius: 16px; overflow: hidden;
  border: 1px solid var(--border); background: #fff;
}
.pg-main img { width: 100%; display: block; }
.pg-thumbs {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px;
  margin-top: 12px;
}
.pg-thumbs img {
  width: 100%; border-radius: 10px; cursor: pointer;
  border: 1px solid var(--border); background: #fff;
  transition: border-color .15s, transform .15s;
}
.pg-thumbs img:hover { border-color: var(--cyan); transform: translateY(-2px); }
.detail-gallery {
  display: grid; gap: 20px; max-width: 860px; margin: 0 auto;
}
.detail-gallery img {
  width: 100%; display: block; border-radius: 16px;
  border: 1px solid var(--border); background: #fff;
}

@media (max-width: 900px) {
  .brand-explorer { flex-direction: column; gap: 20px; }
  .bx-nav {
    position: static; flex: none; width: 100%;
    flex-direction: row; flex-wrap: wrap;
  }
  .bx-nav a i { display: none; }
}

/* ===== 特性网格 ===== */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  border: 1px solid var(--border); background: var(--panel);
  border-radius: var(--radius); padding: 30px; backdrop-filter: blur(10px);
  transition: .3s; position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(43,111,255,0.08), transparent 40%);
  opacity: 0; transition: .3s;
}
.card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: 0 18px 40px rgba(0,0,0,0.45); }
.card:hover::before { opacity: 1; }
.card .icon {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(43,111,255,0.25), rgba(0,229,255,0.15));
  border: 1px solid var(--border-strong); margin-bottom: 18px; font-size: 22px;
}
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--text-dim); font-size: 15px; }

/* ===== 数据条 ===== */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat { border: 1px solid var(--border); border-radius: var(--radius); padding: 30px 16px; background: var(--panel); }
.stat .num { font-size: 42px; font-weight: 800; background: linear-gradient(90deg, var(--cyan), var(--violet)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .label { color: var(--text-dim); font-size: 14px; margin-top: 6px; }

/* ===== 品牌入口（首页） ===== */
.brand-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.brand-card {
  border: 1px solid var(--border); background: var(--panel); border-radius: var(--radius);
  padding: 28px 22px; text-align: center; transition: .3s; display: block;
}
.brand-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: 0 18px 40px rgba(0,0,0,0.45); }
.brand-card .logo-badge {
  width: 56px; height: 56px; margin: 0 auto 16px; border-radius: 14px; display: grid; place-items: center;
  font-weight: 800; font-size: 20px; color: #04101f;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
}
.brand-card h3 { font-size: 18px; margin-bottom: 6px; }
.brand-card p { color: var(--text-dim); font-size: 14px; }
.brand-card .more { color: var(--cyan); font-size: 14px; margin-top: 12px; display: inline-block; }

/* ===== 产品页 ===== */
.filters { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px; }
.filter {
  border: 1px solid var(--border); background: var(--panel); color: var(--text-dim);
  padding: 9px 20px; border-radius: 999px; cursor: pointer; transition: .2s; font-size: 14px;
}
.filter:hover { color: var(--text); border-color: var(--border-strong); }
.filter.active { background: linear-gradient(135deg, var(--primary), var(--violet)); color: #04101f; border: none; }

.product-card { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--panel-solid); transition: .3s; display: flex; flex-direction: column; }
.product-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: 0 18px 40px rgba(0,0,0,0.5); }
.product-thumb { height: 180px; background: linear-gradient(135deg, #0e1730, #122044); position: relative; display: grid; place-items: center; border-bottom: 1px solid var(--border); overflow: hidden; }
.product-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.product-thumb .ph { font-size: 44px; opacity: .85; }
.product-thumb .tag { position: absolute; top: 12px; left: 12px; font-size: 12px; background: rgba(0,229,255,0.15); color: var(--cyan); border: 1px solid var(--border-strong); padding: 4px 10px; border-radius: 999px; }
.sample-badge { position: absolute; top: 12px; right: 12px; z-index: 2; font-size: 11px; letter-spacing: .04em; background: rgba(244,114,182,0.18); color: #f9a8d4; border: 1px solid rgba(244,114,182,0.45); padding: 3px 9px; border-radius: 999px; }
.product-body { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.product-body h3 { font-size: 18px; margin-bottom: 6px; }
.product-body p { color: var(--text-dim); font-size: 14px; min-height: 42px; }
.product-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 16px; }
.price { color: var(--cyan); font-weight: 700; }
.cat-hidden { display: none !important; }

/* ===== 落地页产品详情 ===== */
.breadcrumb { font-size: 13px; color: var(--text-dim); margin: 22px 0 6px; }
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb span { margin: 0 8px; }

.lp-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding-top: 40px; }
.lp-gallery {
  border: 1px solid var(--border); border-radius: var(--radius); min-height: 360px;
  background: linear-gradient(135deg, #0e1730, #122044); display: grid; place-items: center; position: relative;
}
.lp-gallery .ph { font-size: 96px; opacity: .85; }
.lp-gallery img { width: 100%; height: 100%; min-height: 360px; object-fit: cover; display: block; }
.lp-gallery .tag { position: absolute; top: 16px; left: 16px; font-size: 12px; background: rgba(0,229,255,0.15); color: var(--cyan); border: 1px solid var(--border-strong); padding: 5px 12px; border-radius: 999px; }
.lp-gallery .sample-badge { top: 16px; right: 16px; }
.lp-info h1 { font-size: clamp(28px, 4vw, 40px); line-height: 1.15; margin-bottom: 14px; }
.lp-info .lead { color: var(--text-dim); font-size: 17px; margin-bottom: 22px; }
.lp-tags { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 24px; }
.lp-tag { border: 1px solid var(--border); background: var(--panel); padding: 7px 14px; border-radius: 999px; font-size: 13px; color: var(--text-dim); }
.lp-tag b { color: var(--cyan); }

/* 规格表 */
.spec-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.spec-table th, .spec-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); font-size: 15px; }
.spec-table th { color: var(--text-dim); font-weight: 500; width: 38%; }
.spec-table td { color: var(--text); }

/* 适用型号列表 */
.model-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 12px; }
.model-pill { border: 1px solid var(--border); background: var(--panel); padding: 8px 14px; border-radius: 10px; font-size: 14px; color: var(--text-dim); }

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

/* ===== FAQ ===== */
.faq-item { border: 1px solid var(--border); background: var(--panel); border-radius: 12px; padding: 18px 22px; margin-bottom: 14px; transition: .2s; }
.faq-item:hover { border-color: var(--border-strong); }
.faq-item h3 { font-size: 16px; margin-bottom: 8px; color: var(--text); }
.faq-item p { color: var(--text-dim); font-size: 15px; }
.faq-item .q { color: var(--cyan); margin-right: 8px; }

/* ===== 文章/博客 ===== */
.article { max-width: 820px; margin: 0 auto; }
.article h1 { font-size: clamp(28px, 4.4vw, 42px); line-height: 1.18; margin-bottom: 16px; }
.article .meta { color: var(--text-dim); font-size: 14px; margin-bottom: 28px; }
.article h2 { font-size: clamp(22px, 3vw, 30px); margin: 40px 0 16px; }
.article h3 { font-size: 20px; margin: 28px 0 12px; }
.article p { color: var(--text-dim); margin-bottom: 16px; font-size: 16px; }
.article ul.bullets { margin: 0 0 18px 4px; }
.article ul.bullets li { color: var(--text-dim); font-size: 16px; padding-left: 22px; position: relative; margin-bottom: 10px; }
.article ul.bullets li::before { content: "▹"; position: absolute; left: 0; color: var(--cyan); }
.article strong { color: var(--text); }
.article a.inline { color: var(--cyan); border-bottom: 1px solid rgba(0,229,255,0.3); }
.article .callout { border: 1px solid var(--border-strong); background: rgba(43,111,255,0.08); border-radius: 12px; padding: 20px 24px; margin: 24px 0; }
.article .callout p { color: var(--text); margin: 0; }

.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.blog-card { border: 1px solid var(--border); background: var(--panel); border-radius: var(--radius); overflow: hidden; transition: .3s; display: flex; flex-direction: column; }
.blog-card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: 0 18px 40px rgba(0,0,0,0.45); }
.blog-thumb { height: 160px; background: linear-gradient(135deg, #0e1730, #122044); display: grid; place-items: center; font-size: 40px; border-bottom: 1px solid var(--border); }
.blog-body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.blog-body .cat { font-size: 12px; color: var(--cyan); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.blog-body h3 { font-size: 18px; margin-bottom: 8px; line-height: 1.35; }
.blog-body p { color: var(--text-dim); font-size: 14px; flex: 1; }
.blog-body .more { color: var(--cyan); font-size: 14px; margin-top: 14px; }

/* ===== 联系页 ===== */
.contact-wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 40px; }
.form { border: 1px solid var(--border); background: var(--panel); border-radius: var(--radius); padding: 34px; backdrop-filter: blur(10px); }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; color: var(--text-dim); margin-bottom: 8px; }
.field input, .field textarea, .field select {
  width: 100%; background: rgba(244,247,252,0.85); border: 1px solid var(--border);
  color: var(--text); border-radius: 10px; padding: 12px 14px; font-family: inherit; font-size: 15px; transition: .2s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(0,229,255,0.15); }
.field textarea { resize: vertical; min-height: 120px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-note { color: var(--text-dim); font-size: 13px; margin-top: 6px; }
.form-success { border: 1px solid rgba(0,229,255,0.4); background: rgba(0,229,255,0.08); color: var(--text); border-radius: 12px; padding: 18px 22px; text-align: center; }
.info-card { border: 1px solid var(--border); background: var(--panel); border-radius: var(--radius); padding: 30px; backdrop-filter: blur(10px); }
.info-card h3 { margin-bottom: 18px; }
.info-row { display: flex; gap: 14px; margin-bottom: 18px; }
.info-row .ic { width: 40px; height: 40px; flex: none; border-radius: 10px; display: grid; place-items: center; background: rgba(43,111,255,0.15); border: 1px solid var(--border-strong); }
.info-row .t { color: var(--text-dim); font-size: 13px; }
.info-row .v { color: var(--text); font-size: 15px; }
.info-row .v a { color: var(--cyan); }

/* ===== 页脚 ===== */
.site-footer { border-top: 1px solid var(--border); background: var(--bg-soft); padding: 60px 0 30px; position: relative; z-index: 1; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 32px; }
.footer-grid h4 { font-size: 15px; margin-bottom: 16px; color: var(--text); }
.footer-grid a { display: block; color: var(--text-dim); font-size: 14px; margin-bottom: 10px; transition: .2s; }
.footer-grid a:hover { color: var(--cyan); }
.footer-about p { color: var(--text-dim); font-size: 14px; margin-top: 14px; max-width: 320px; }
.footer-bottom { border-top: 1px solid var(--border); margin-top: 40px; padding-top: 22px; text-align: center; color: var(--text-dim); font-size: 13px; }
.footer-bottom a { color: var(--text-dim); }
.footer-bottom a:hover { color: var(--cyan); }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .grid-3, .grid-4, .brand-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-wrap { grid-template-columns: 1fr; }
  .lp-hero { grid-template-columns: 1fr; gap: 28px; }
  .related, .blog-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .menu-toggle { display: block; }
  .nav-links.open { display: flex; position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; background: var(--bg-soft); padding: 20px 24px; border-bottom: 1px solid var(--border); gap: 16px; }
  .grid-3, .grid-4, .grid-2, .brand-grid, .related, .blog-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .field-row { grid-template-columns: 1fr; }
  section { padding: 60px 0; }
}