/* =========================================================
   鑫之鑫硬质合金 - 企业官网样式表
   浅色高端 + 红色主色调 + 金色点缀
   设计：clean, minimalist, premium
   ========================================================= */

:root {
  /* 主色 */
  --red: #C8102E;
  --red-dark: #9C0C24;
  --red-light: #E63946;
  --red-soft: #FCE8EC;
  --gold: #B89968;
  --gold-light: #D4B98C;

  /* 中性 */
  --bg: #ffffff;
  --bg-soft: #F7F7F9;
  --bg-mute: #F0F1F4;
  --line: #E5E6EB;
  --ink: #1A1A1A;
  --text: #333333;
  --muted: #6B7280;
  --white: #ffffff;

  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
  --shadow: 0 4px 16px rgba(16, 24, 40, .08);
  --shadow-lg: 0 12px 40px rgba(16, 24, 40, .12);

  /* 圆角 */
  --r: 6px;
  --r-lg: 12px;

  /* 容器 */
  --container: 1200px;
}

/* reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans CN", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: var(--red); text-decoration: none; transition: color .2s; }
a:hover { color: var(--red-dark); }
ul, ol { list-style: none; }

/* 容器 */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ===== 顶部信息条 ===== */
.topbar { background: #1A1A1A; color: #cfd2d8; font-size: 13px; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; height: 38px; }
.topbar a { color: #cfd2d8; }
.topbar a:hover { color: #fff; }
.topbar .tb-left { display: flex; gap: 22px; }
.topbar .tb-right { display: flex; gap: 18px; align-items: center; }
.topbar .tb-right .hot { color: #ffb4bb; font-weight: 600; letter-spacing: .5px; }

/* ===== 主导航 ===== */
.header { background: #fff; border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 100; box-shadow: var(--shadow-sm); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 78px; }
.brand { display: flex; align-items: center; gap: 14px; }
.brand .logo {
  width: 50px; height: 50px; border-radius: 10px;
  background: linear-gradient(135deg, var(--red), var(--red-dark));
  color: #fff; display: grid; place-items: center;
  font-weight: 800; font-size: 22px; letter-spacing: -1px;
  box-shadow: 0 6px 18px rgba(200, 16, 46, .35);
}
.brand .name { line-height: 1.15; }
.brand .name .cn { font-size: 20px; font-weight: 700; color: var(--ink); letter-spacing: 1px; }
.brand .name .en { font-size: 11px; color: var(--muted); letter-spacing: 2px; text-transform: uppercase; }

.nav { display: flex; align-items: center; gap: 2px; white-space: nowrap; }
.nav a {
  color: var(--ink); font-size: 15px; font-weight: 500;
  padding: 8px 12px; border-radius: var(--r); position: relative; white-space: nowrap;
}
.nav a:hover { color: var(--red); }
.nav a.active { color: var(--red); }
.nav a.active::after {
  content: ""; position: absolute; left: 12px; right: 12px; bottom: 2px;
  height: 2px; background: var(--red); border-radius: 2px;
}
.nav-cta {
  background: var(--red); color: #fff !important; padding: 8px 18px !important;
  border-radius: 30px; font-weight: 600; margin-left: 6px;
  box-shadow: 0 6px 16px rgba(200, 16, 46, .3);
  font-size: 14px !important;
}
.nav-cta:hover { background: var(--red-dark); color: #fff !important; }

.menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; transition: .3s; }

/* ===== Hero ===== */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(255,255,255,.18), transparent 60%),
    linear-gradient(120deg, #8a0a1f 0%, #C8102E 50%, #b00d28 100%);
  color: #fff;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,.35), transparent 70%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.35), transparent 70%);
}
.hero .container { position: relative; z-index: 2; display: grid; grid-template-columns: 1.15fr .85fr; gap: 50px; align-items: center; padding-top: 64px; padding-bottom: 64px; min-height: 520px; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.28);
  padding: 7px 16px; border-radius: 30px; font-size: 13px; font-weight: 500;
  backdrop-filter: blur(6px); margin-bottom: 22px;
}
.hero-tag .dot { width: 8px; height: 8px; background: #ffd64d; border-radius: 50%; box-shadow: 0 0 0 4px rgba(255,214,77,.25); }
.hero h1 {
  font-size: 46px; line-height: 1.2; font-weight: 800; letter-spacing: 2px;
  margin-bottom: 18px;
}
.hero h1 .accent { color: #ffd64d; }
.hero p.lead {
  font-size: 17px; color: rgba(255,255,255,.9); max-width: 560px; margin-bottom: 28px;
  line-height: 1.85;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 30px; border-radius: 30px; font-size: 15px; font-weight: 600;
  cursor: pointer; border: none; transition: all .25s; text-decoration: none;
}
.btn-primary { background: #fff; color: var(--red); }
.btn-primary:hover { background: #ffd64d; color: var(--red-dark); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(0,0,0,.2); }
.btn-outline { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.6); }
.btn-outline:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-red { background: var(--red); color: #fff; }
.btn-red:hover { background: var(--red-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-lg { padding: 16px 38px; font-size: 16px; }

.hero-stats { display: flex; gap: 32px; margin-top: 38px; padding-top: 28px; border-top: 1px solid rgba(255,255,255,.2); }
.hero-stats .stat .num { font-size: 34px; font-weight: 800; color: #ffd64d; line-height: 1; }
.hero-stats .stat .label { font-size: 13px; color: rgba(255,255,255,.82); margin-top: 6px; }

/* hero 右侧视觉卡 */
.hero-visual { position: relative; }
.hero-card {
  background: rgba(255,255,255,.97); color: var(--ink); border-radius: 16px;
  padding: 26px; box-shadow: 0 30px 60px rgba(0,0,0,.3);
  position: relative;
}
.hero-card .hc-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 18px; }
.hero-card .hc-title { font-size: 18px; font-weight: 700; }
.hero-card .hc-title small { display: block; font-size: 12px; color: var(--muted); font-weight: 400; margin-top: 4px; }
.hero-card .hc-badge { background: var(--red-soft); color: var(--red); font-size: 12px; font-weight: 600; padding: 5px 12px; border-radius: 30px; }
.hero-card ul.hc-list li { display: flex; align-items: center; gap: 10px; padding: 9px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.hero-card ul.hc-list li:last-child { border-bottom: none; }
.hero-card ul.hc-list li .ck { width: 18px; height: 18px; flex: none; background: var(--red); border-radius: 50%; color: #fff; display: grid; place-items: center; font-size: 11px; }
.hero-card .hc-foot { margin-top: 16px; display: flex; justify-content: space-between; align-items: center; background: var(--bg-soft); padding: 12px 14px; border-radius: 10px; }
.hero-card .hc-foot .phone { font-size: 18px; font-weight: 800; color: var(--red); }

/* ===== 通用区块 ===== */
.section { padding: 72px 0; }
.section.tight { padding: 56px 0; }
.section.alt { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 48px; }
.section-head .eyebrow {
  display: inline-block; color: var(--red); font-weight: 700; letter-spacing: 3px;
  font-size: 13px; text-transform: uppercase; margin-bottom: 12px;
}
.section-head h2 { font-size: 32px; color: var(--ink); font-weight: 800; letter-spacing: 1px; line-height: 1.3; }
.section-head h2 .red { color: var(--red); }
.section-head .sub { color: var(--muted); font-size: 16px; margin-top: 14px; line-height: 1.8; }
.section-head .divider { width: 56px; height: 3px; background: var(--red); margin: 16px auto 0; border-radius: 3px; position: relative; }
.section-head .divider::before, .section-head .divider::after { content: ""; position: absolute; top: 1px; width: 6px; height: 6px; background: var(--gold); border-radius: 50%; }
.section-head .divider::before { left: -12px; }
.section-head .divider::after { right: -12px; }

/* ===== 数据条 ===== */
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.metric {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 28px 24px; text-align: center; transition: .3s; position: relative; overflow: hidden;
}
.metric::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: linear-gradient(90deg, var(--red), var(--gold)); transform: scaleX(0); transition: .35s; }
.metric:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.metric:hover::before { transform: scaleX(1); }
.metric .num { font-size: 40px; font-weight: 800; color: var(--red); line-height: 1; }
.metric .num small { font-size: 18px; }
.metric .label { margin-top: 10px; color: var(--muted); font-size: 15px; }

/* ===== 优势卡 ===== */
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.adv {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 32px 26px; transition: .3s; position: relative;
}
.adv:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--red-light); }
.adv .ico {
  width: 54px; height: 54px; border-radius: 14px; display: grid; place-items: center;
  background: var(--red-soft); color: var(--red); font-size: 26px; margin-bottom: 18px;
}
.adv h3 { font-size: 18px; color: var(--ink); margin-bottom: 10px; font-weight: 700; }
.adv p { color: var(--muted); font-size: 14.5px; line-height: 1.8; }

/* ===== 产品分类卡 ===== */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.prod-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  overflow: hidden; transition: .3s; display: flex; flex-direction: column;
}
.prod-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--red-light); }
.prod-card .pc-img {
  height: 200px; background: var(--bg-mute);
  display: grid; place-items: center; position: relative; overflow: hidden;
}
.prod-card .pc-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.prod-card .pc-img .ph { display: none; }
.prod-card .pc-img .tag {
  position: absolute; top: 12px; left: 12px; background: var(--red); color: #fff;
  font-size: 12px; padding: 4px 12px; border-radius: 20px; font-weight: 600;
}
.prod-card .pc-body { padding: 22px 24px 26px; flex: 1; display: flex; flex-direction: column; }
.prod-card h3 { font-size: 18px; color: var(--ink); margin-bottom: 8px; font-weight: 700; }
.prod-card .desc { color: var(--muted); font-size: 14px; line-height: 1.7; margin-bottom: 14px; flex: 1; }
.prod-card .items { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.prod-card .items span { font-size: 12px; color: #555; background: var(--bg-mute); padding: 4px 10px; border-radius: 20px; }
.prod-card .more { color: var(--red); font-weight: 600; font-size: 14px; display: inline-flex; align-items: center; gap: 4px; }

/* ===== 应用领域 ===== */
.app-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.app-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 28px 22px; text-align: center; transition: .3s; position: relative; overflow: hidden;
}
.app-card::after { content: ""; position: absolute; left: 50%; bottom: -40px; width: 80px; height: 80px; background: var(--red-soft); border-radius: 50%; transform: translateX(-50%); transition: .4s; opacity: 0; }
.app-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--red-light); }
.app-card:hover::after { bottom: -20px; opacity: 1; }
.app-card .ico { width: 60px; height: 60px; margin: 0 auto 16px; border-radius: 16px; background: linear-gradient(135deg, var(--red-soft), #fff); color: var(--red); display: grid; place-items: center; font-size: 28px; position: relative; z-index: 1; }
.app-card h3 { font-size: 17px; color: var(--ink); font-weight: 700; position: relative; z-index: 1; }
.app-card p { color: var(--muted); font-size: 13px; margin-top: 8px; position: relative; z-index: 1; }

/* ===== 服务承诺时间线 ===== */
.promise-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.promise {
  display: flex; gap: 18px; background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 24px 26px; transition: .3s;
}
.promise:hover { box-shadow: var(--shadow); border-color: var(--red-light); transform: translateX(4px); }
.promise .pi { width: 44px; height: 44px; flex: none; border-radius: 12px; background: linear-gradient(135deg, var(--red), var(--red-dark)); color: #fff; display: grid; place-items: center; font-size: 20px; box-shadow: 0 8px 18px rgba(200,16,46,.3); }
.promise h3 { font-size: 16px; color: var(--ink); margin-bottom: 6px; font-weight: 700; }
.promise p { color: var(--muted); font-size: 14px; line-height: 1.7; }

/* ===== 客户栏 ===== */
.clients { display: flex; flex-wrap: wrap; justify-content: center; gap: 20px; }
.client-pill {
  background: #fff; border: 1px solid var(--line); padding: 14px 30px;
  border-radius: 30px; font-weight: 700; color: var(--ink); font-size: 17px;
  box-shadow: var(--shadow-sm); transition: .3s;
}
.client-pill:hover { border-color: var(--red); color: var(--red); transform: translateY(-3px); }

/* ===== CTA 条 ===== */
.cta-band {
  background: linear-gradient(120deg, #9C0C24 0%, #C8102E 60%, #b00d28 100%);
  color: #fff; position: relative; overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 40px 40px; mask-image: radial-gradient(circle at 30% 50%, #000, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 30% 50%, #000, transparent 70%);
}
.cta-band .container { position: relative; z-index: 2; display: flex; justify-content: space-between; align-items: center; gap: 30px; padding: 50px 24px; flex-wrap: wrap; }
.cta-band h2 { font-size: 30px; font-weight: 800; letter-spacing: 1px; }
.cta-band h2 .gold { color: #ffd64d; }
.cta-band p { color: rgba(255,255,255,.85); margin-top: 10px; font-size: 15px; }

/* ===== 页脚 ===== */
.footer { background: #141416; color: #b8bcc4; padding: 60px 0 0; }
.footer .f-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid #2a2a2e; }
.footer .f-brand .name { color: #fff; font-size: 20px; font-weight: 700; margin-bottom: 12px; letter-spacing: 1px; }
.footer .f-brand p { font-size: 14px; line-height: 1.9; color: #8d919a; }
.footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; font-weight: 600; }
.footer ul li { margin-bottom: 10px; }
.footer ul li a { color: #b8bcc4; font-size: 14px; }
.footer ul li a:hover { color: var(--red-light); }
.footer .f-contact li { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: #b8bcc4; margin-bottom: 12px; }
.footer .f-contact li .ico { color: var(--red-light); font-size: 16px; flex: none; margin-top: 2px; }
.footer .f-bottom { padding: 22px 0; text-align: center; font-size: 13px; color: #6b6f78; }
.footer .f-bottom a { color: #8d919a; margin: 0 6px; }

/* ===== 面包屑 ===== */
.breadcrumb { background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.breadcrumb .container { display: flex; align-items: center; gap: 8px; height: 50px; font-size: 13px; color: var(--muted); }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--red); }
.breadcrumb .sep { color: #cfd2d8; }

/* ===== 页面标题区 ===== */
.page-hero { background: linear-gradient(120deg, #9C0C24, #C8102E); color: #fff; padding: 56px 0; position: relative; overflow: hidden; }
.page-hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px); background-size: 44px 44px; mask-image: linear-gradient(180deg, rgba(0,0,0,.4), transparent); -webkit-mask-image: linear-gradient(180deg, rgba(0,0,0,.4), transparent); }
.page-hero .container { position: relative; z-index: 2; }
.page-hero .eyebrow { color: #ffd64d; font-weight: 700; letter-spacing: 3px; font-size: 13px; text-transform: uppercase; }
.page-hero h1 { font-size: 36px; font-weight: 800; letter-spacing: 1px; margin-top: 8px; }
.page-hero p { color: rgba(255,255,255,.88); margin-top: 12px; max-width: 720px; font-size: 16px; line-height: 1.8; }

/* ===== 痛点-方案表 ===== */
.pts { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
.pts .row { display: contents; }
.pts .cell { padding: 22px 26px; border-bottom: 1px solid var(--line); display: flex; gap: 14px; align-items: flex-start; }
.pts .cell.pain { background: var(--bg-soft); }
.pts .cell.sol { background: #fff; }
.pts .cell .ico { width: 34px; height: 34px; flex: none; border-radius: 9px; display: grid; place-items: center; font-size: 16px; }
.pts .cell.pain .ico { background: #fde3e3; color: #b00d28; }
.pts .cell.sol .ico { background: #e3f6e8; color: #1e8a3c; }
.pts .cell h4 { font-size: 15px; color: var(--ink); margin-bottom: 4px; font-weight: 700; }
.pts .cell p { font-size: 14px; color: var(--muted); line-height: 1.7; }
.pts .row:last-child .cell { border-bottom: none; }

/* ===== FAQ ===== */
.faq-list { max-width: 880px; margin: 0 auto; }
.faq-item { border: 1px solid var(--line); border-radius: var(--r-lg); margin-bottom: 14px; background: #fff; overflow: hidden; transition: .3s; }
.faq-item:hover { box-shadow: var(--shadow); border-color: var(--red-light); }
.faq-item summary { list-style: none; cursor: pointer; padding: 20px 24px; display: flex; justify-content: space-between; align-items: center; gap: 16px; font-size: 16px; font-weight: 700; color: var(--ink); }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .q-tag { color: var(--red); font-weight: 800; margin-right: 8px; }
.faq-item summary .arrow { transition: .3s; color: var(--red); font-size: 18px; }
.faq-item[open] summary .arrow { transform: rotate(180deg); }
.faq-item .ans { padding: 0 24px 22px 24px; color: var(--text); font-size: 15px; line-height: 1.9; }
.faq-item .ans p { margin-bottom: 10px; }

/* ===== 流程时间线 ===== */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.flow::before { content: ""; position: absolute; top: 30px; left: 8%; right: 8%; height: 2px; background: linear-gradient(90deg, var(--red), var(--gold)); z-index: 0; }
.flow .step { text-align: center; position: relative; z-index: 1; }
.flow .step .n { width: 60px; height: 60px; margin: 0 auto 16px; border-radius: 50%; background: #fff; border: 3px solid var(--red); color: var(--red); display: grid; place-items: center; font-size: 22px; font-weight: 800; box-shadow: 0 8px 20px rgba(200,16,46,.2); }
.flow .step h4 { font-size: 17px; color: var(--ink); font-weight: 700; margin-bottom: 6px; }
.flow .step p { color: var(--muted); font-size: 13.5px; line-height: 1.7; padding: 0 8px; }

/* ===== 联系页 ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info .ci-item { display: flex; gap: 18px; padding: 22px 0; border-bottom: 1px dashed var(--line); }
.contact-info .ci-item:last-child { border-bottom: none; }
.contact-info .ci-item .ico { width: 48px; height: 48px; flex: none; border-radius: 12px; background: var(--red-soft); color: var(--red); display: grid; place-items: center; font-size: 22px; }
.contact-info .ci-item h4 { font-size: 14px; color: var(--muted); font-weight: 500; margin-bottom: 4px; }
.contact-info .ci-item .v { font-size: 20px; color: var(--ink); font-weight: 700; }
.contact-info .ci-item .v.red { color: var(--red); }
.contact-form { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 32px; box-shadow: var(--shadow); }
.contact-form h3 { font-size: 20px; color: var(--ink); margin-bottom: 6px; font-weight: 700; }
.contact-form .sub { color: var(--muted); font-size: 14px; margin-bottom: 22px; }
.contact-form .field { margin-bottom: 16px; }
.contact-form label { display: block; font-size: 14px; color: var(--ink); margin-bottom: 6px; font-weight: 600; }
.contact-form label .req { color: var(--red); }
.contact-form input, .contact-form textarea, .contact-form select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--r);
  font-size: 14px; font-family: inherit; background: var(--bg-soft); transition: .2s;
}
.contact-form input:focus, .contact-form textarea:focus, .contact-form select:focus { outline: none; border-color: var(--red); background: #fff; box-shadow: 0 0 0 3px rgba(200,16,46,.12); }
.contact-form textarea { resize: vertical; min-height: 110px; }

/* ===== 证书/图片卡 ===== */
.cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.cert-card { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; transition: .3s; }
.cert-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.cert-card .cc-img { aspect-ratio: 4/3; background: var(--bg-mute); overflow: hidden; }
.cert-card .cc-img img { width: 100%; height: 100%; object-fit: cover; }
.cert-card .cc-body { padding: 18px 20px; }
.cert-card h3 { font-size: 16px; color: var(--ink); font-weight: 700; margin-bottom: 4px; }
.cert-card p { color: var(--muted); font-size: 13px; }

/* ===== 关于页 - 简介 ===== */
.about-intro { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: center; }
.about-intro .ai-text p { color: var(--text); font-size: 16px; line-height: 2; margin-bottom: 18px; }
.about-intro .ai-text p .hl { color: var(--red); font-weight: 700; }
.about-intro .ai-side { background: linear-gradient(135deg, var(--red), var(--red-dark)); color: #fff; border-radius: var(--r-lg); padding: 34px; box-shadow: var(--shadow-lg); }
.about-intro .ai-side h3 { font-size: 20px; font-weight: 800; margin-bottom: 18px; }
.about-intro .ai-side ul li { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-bottom: 1px solid rgba(255,255,255,.18); }
.about-intro .ai-side ul li:last-child { border-bottom: none; }
.about-intro .ai-side ul li .ck { color: #ffd64d; font-weight: 800; }

/* ===== 设备图标网格 ===== */
.equip-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.equip {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 24px 18px; text-align: center; transition: .3s;
}
.equip:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--red-light); }
.equip .ico { width: 48px; height: 48px; margin: 0 auto 12px; border-radius: 12px; background: var(--red-soft); color: var(--red); display: grid; place-items: center; font-size: 22px; }
.equip h4 { font-size: 15px; color: var(--ink); font-weight: 700; }
.equip p { font-size: 12px; color: var(--muted); margin-top: 4px; }

/* ===== 产品列表(标签) ===== */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-cloud a {
  background: #fff; border: 1px solid var(--line); color: var(--text);
  padding: 8px 16px; border-radius: 24px; font-size: 14px; transition: .25s;
}
.tag-cloud a:hover { background: var(--red); color: #fff; border-color: var(--red); transform: translateY(-2px); box-shadow: 0 6px 14px rgba(200,16,46,.25); }

/* ===== 行业资讯 ===== */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-card { background: #fff; border: 1px solid #eef0f3; border-radius: 10px; overflow: hidden; transition: transform .25s, box-shadow .25s; cursor: pointer; display: flex; flex-direction: column; }
.news-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,.08); }
.news-card .nc-cover { height: 180px; background: linear-gradient(135deg, var(--red) 0%, var(--red-dark) 100%); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 36px; font-weight: 800; letter-spacing: 2px; position: relative; }
.news-card .nc-cover::after { content: ''; position: absolute; inset: 0; background: repeating-linear-gradient(45deg, rgba(255,255,255,.05) 0 20px, transparent 20px 40px); }
.news-card .nc-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.news-card .nc-meta { display: flex; gap: 12px; align-items: center; font-size: 12px; color: var(--muted); margin-bottom: 10px; }
.news-card .nc-meta .cat { background: var(--red); color: #fff; padding: 2px 8px; border-radius: 4px; font-size: 11px; }
.news-card h3 { font-size: 17px; line-height: 1.5; margin-bottom: 10px; color: #1a1d22; font-weight: 700; }
.news-card .nc-excerpt { font-size: 13px; color: #6b6f78; line-height: 1.7; flex: 1; }
.news-card .nc-more { margin-top: 14px; font-size: 13px; color: var(--red); font-weight: 600; }
.news-filter { display: flex; gap: 10px; margin-bottom: 30px; flex-wrap: wrap; }
.news-filter .nf-chip { padding: 7px 18px; border: 1px solid #e1e3e8; border-radius: 20px; font-size: 13px; color: #555; background: #fff; cursor: pointer; transition: all .2s; }
.news-filter .nf-chip:hover { border-color: var(--red); color: var(--red); }
.news-filter .nf-chip.active { background: var(--red); border-color: var(--red); color: #fff; }

/* 文章详情 */
.article-wrap { max-width: 820px; margin: 0 auto; padding: 40px 20px 60px; }
.article-wrap .cat-tag { display: inline-block; background: var(--red); color: #fff; padding: 4px 12px; border-radius: 4px; font-size: 12px; margin-bottom: 16px; }
.article-wrap h1 { font-size: 28px; line-height: 1.4; margin-bottom: 16px; color: #1a1d22; font-weight: 800; }
.article-wrap .meta-bar { display: flex; gap: 16px; align-items: center; font-size: 13px; color: var(--muted); padding-bottom: 20px; border-bottom: 1px solid #eef0f3; margin-bottom: 28px; }
.article-wrap .meta-bar .dot { width: 3px; height: 3px; background: #c0c3c9; border-radius: 50%; }
.article-wrap .content { font-size: 16px; line-height: 1.9; color: #333; }
.article-wrap .content h2 { font-size: 20px; font-weight: 800; margin: 36px 0 14px; color: #1a1d22; border-left: 3px solid var(--red); padding-left: 12px; }
.article-wrap .content h3 { font-size: 17px; font-weight: 700; margin: 22px 0 10px; color: #2a2d32; }
.article-wrap .content p { margin-bottom: 14px; }
.article-wrap .content ul, .article-wrap .content ol { padding-left: 24px; margin-bottom: 14px; }
.article-wrap .content li { margin-bottom: 6px; }
.article-wrap .content table { width: 100%; border-collapse: collapse; margin: 16px 0 20px; font-size: 14px; }
.article-wrap .content th { background: #f7f7f9; padding: 10px 12px; text-align: left; font-weight: 700; border: 1px solid #e1e3e8; color: #1a1d22; }
.article-wrap .content td { padding: 10px 12px; border: 1px solid #e1e3e8; }
.article-wrap .content strong { color: var(--red-dark); }
.article-wrap .content a { color: var(--red); text-decoration: underline; }

/* ===== 通用辅助 ===== */
.text-center { text-align: center; }
.mt-40 { margin-top: 40px; }
.note { font-size: 13px; color: var(--muted); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .metrics, .adv-grid, .app-grid, .equip-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid, .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .footer .f-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .flow::before { display: none; }
}
@media (max-width: 768px) {
  .container { padding: 0 18px; }
  .topbar .tb-left { display: none; }
  .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: #fff; flex-direction: column; padding: 14px; box-shadow: var(--shadow-lg); border-top: 1px solid var(--line); gap: 0; }
  .nav.open { display: flex; }
  .nav a { padding: 14px 18px; width: 100%; border-radius: 0; }
  .nav a.active::after { display: none; }
  .nav-cta { margin: 8px 0 0; text-align: center; }
  .menu-toggle { display: block; }
  .hero h1 { font-size: 30px; }
  .hero p.lead { font-size: 15px; }
  .hero-stats { gap: 18px; flex-wrap: wrap; }
  .hero-stats .stat .num { font-size: 26px; }
  .section { padding: 48px 0; }
  .section-head h2 { font-size: 24px; }
  .metrics, .adv-grid, .app-grid, .equip-grid, .prod-grid, .cert-grid, .promise-list, .pts, .contact-grid, .about-intro { grid-template-columns: 1fr; }
  .footer .f-grid { grid-template-columns: 1fr; }
  .cta-band .container { flex-direction: column; text-align: center; }
  .flow { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: 26px; }
}