/* ============ 核桃科技官网 全站样式 ============ */
:root {
  --navy-900: #0b1e3f;
  --navy-800: #12294f;
  --navy-700: #1e3a8a;
  --blue-600: #2563eb;
  --blue-500: #3b82f6;
  --blue-400: #60a5fa;
  --blue-100: #dbeafe;
  --bg-light: #f4f7fb;
  --text-main: #16233b;
  --text-sub: #5a6b85;
  --border: #e3e9f2;
  --radius: 12px;
  --shadow: 0 4px 20px rgba(18, 41, 79, .08);
  --shadow-hover: 0 8px 28px rgba(37, 99, 235, .18);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text-main);
  background: var(--bg-light);
  line-height: 1.65;
  padding-top: 64px; /* 固定头部 */
}
img { max-width: 100%; display: block; }
a { color: var(--blue-600); text-decoration: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- 头部 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(11, 30, 63, .96);
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 12px rgba(0,0,0,.25);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo-text { color: #fff; font-size: 19px; font-weight: 700; display: flex; flex-direction: column; line-height: 1.15; }
.logo-text small { font-size: 10px; font-weight: 400; letter-spacing: 2px; color: var(--blue-400); }
.main-nav { display: flex; gap: 4px; align-items: center; }
.main-nav a {
  color: #cdd9ee; padding: 8px 14px; border-radius: 8px; font-size: 15px; transition: .2s;
}
.main-nav a:hover { color: #fff; background: rgba(255,255,255,.08); }
.main-nav a.active { color: #fff; background: var(--blue-600); }
.main-nav a.nav-admin { border: 1px solid rgba(255,255,255,.25); margin-left: 8px; }
.header-right { display: flex; align-items: center; gap: 12px; }
.lang-btn {
  background: rgba(59,130,246,.18); color: #bfdbfe; border: 1px solid rgba(96,165,250,.5);
  padding: 6px 14px; border-radius: 20px; cursor: pointer; font-size: 13px; transition: .2s;
  display: flex; align-items: center;
}
.lang-btn:hover { background: var(--blue-600); color: #fff; }
.lang-wrap { position: relative; }
.lang-menu {
  display: none; position: absolute; right: 0; top: calc(100% + 6px); z-index: 120;
  background: #fff; border: 1px solid var(--border); border-radius: 10px;
  box-shadow: var(--shadow-hover); overflow: hidden; min-width: 120px;
}
.lang-wrap.open .lang-menu { display: block; }
.lang-menu button {
  display: block; width: 100%; text-align: left; padding: 10px 16px; border: 0;
  background: #fff; cursor: pointer; font-size: 14px; color: var(--text-main);
}
.lang-menu button:hover { background: var(--blue-100); }
.lang-menu button.cur { color: var(--blue-600); font-weight: 700; }
.menu-btn { display: none; background: none; border: 0; cursor: pointer; flex-direction: column; gap: 5px; padding: 6px; }
.menu-btn span { width: 22px; height: 2px; background: #fff; transition: .25s; display: block; }
.menu-btn.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-btn.open span:nth-child(2) { opacity: 0; }
.menu-btn.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, #0b1e3f 0%, #1e3a8a 55%, #2563eb 120%);
  color: #fff; padding: 90px 0 70px; position: relative; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 85% 20%, rgba(96,165,250,.25), transparent 40%),
    radial-gradient(circle at 10% 85%, rgba(37,99,235,.3), transparent 45%);
}
.hero .container { position: relative; }
.hero h1 { font-size: 42px; margin-bottom: 16px; }
.hero p.sub { font-size: 18px; color: #c7d7f5; max-width: 640px; margin-bottom: 32px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 12px 30px; border-radius: 8px; font-size: 16px;
  cursor: pointer; border: 0; transition: .2s; text-align: center;
}
.btn-primary { background: var(--blue-500); color: #fff; }
.btn-primary:hover { background: var(--blue-400); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.btn-outline { border: 1px solid rgba(255,255,255,.5); color: #fff; background: transparent; }
.btn-outline:hover { background: rgba(255,255,255,.12); }
.btn-sm { padding: 8px 20px; font-size: 14px; }
.hero-stats { display: flex; gap: 40px; margin-top: 55px; flex-wrap: wrap; }
.hero-stats b { font-size: 30px; color: #fff; }
.hero-stats span { color: #9db8e5; font-size: 14px; display: block; }

/* ---------- 通用 Section ---------- */
section.block { padding: 70px 0; }
section.block.alt { background: #fff; }
.sec-head { text-align: center; margin-bottom: 44px; }
.sec-head h2 { font-size: 30px; color: var(--navy-800); }
.sec-head h2::after {
  content: ""; display: block; width: 48px; height: 3px; background: var(--blue-500);
  margin: 12px auto 0; border-radius: 2px;
}
.sec-head p { color: var(--text-sub); margin-top: 10px; }

/* ---------- 分类卡片 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.cat-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 16px; text-align: center; transition: .25s; display: block; color: var(--text-main);
}
.cat-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: var(--blue-400); }
.cat-card svg { width: 54px; height: 54px; margin: 0 auto 12px; }
.cat-card h3 { font-size: 17px; color: var(--navy-800); }
.cat-card p { font-size: 12.5px; color: var(--text-sub); margin-top: 6px; }

/* ---------- 品牌 ---------- */
.brand-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.brand-item {
  background: #fff; border: 1px solid var(--border); border-radius: 10px;
  height: 80px; display: flex; align-items: center; justify-content: center;
  color: #8ea1bf; font-weight: 700; font-size: 16px; letter-spacing: 1px; transition: .2s;
}
.brand-item:hover { color: var(--blue-600); border-color: var(--blue-400); }
.brand-note { text-align: center; color: #a9b7cc; font-size: 12.5px; margin-top: 18px; }

/* ---------- 全球网络 ---------- */
.net-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.net-card { background: #fff; border-radius: var(--radius); padding: 26px; border: 1px solid var(--border); border-top: 3px solid var(--blue-500); }
.net-card h3 { color: var(--navy-800); font-size: 18px; margin-bottom: 6px; }
.net-card p { color: var(--text-sub); font-size: 14px; }

/* ---------- 简介 / 关于 ---------- */
.intro-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 50px; align-items: center; }
.intro-tag { color: var(--blue-600); font-weight: 700; letter-spacing: 1px; font-size: 14px; }
.intro-grid h2 { font-size: 28px; color: var(--navy-800); margin: 8px 0 18px; }
.intro-grid p { color: var(--text-sub); margin-bottom: 14px; }
.intro-visual {
  background: linear-gradient(135deg, var(--navy-900), var(--navy-700));
  border-radius: 16px; padding: 30px; color: #fff;
}
.adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 50px; }
.adv-card { background: #fff; border-radius: var(--radius); padding: 26px; border: 1px solid var(--border); transition: .25s; }
.adv-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.adv-card .ic { width: 46px; height: 46px; border-radius: 10px; background: var(--blue-100); display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.adv-card .ic svg { width: 24px; height: 24px; }
.adv-card h3 { font-size: 17px; color: var(--navy-800); margin-bottom: 6px; }
.adv-card p { font-size: 13.5px; color: var(--text-sub); }

/* ---------- 产品页 ---------- */
.page-banner { background: linear-gradient(120deg, var(--navy-900), var(--navy-700)); color: #fff; padding: 52px 0 44px; }
.page-banner h1 { font-size: 32px; }
.page-banner p { color: #b6c9ea; margin-top: 8px; }
.filter-bar { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; display: flex; gap: 12px; flex-wrap: wrap; margin-top: -30px; position: relative; z-index: 5; }
.filter-bar input[type="text"], .filter-bar select {
  padding: 10px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; color: var(--text-main); background: #fff;
}
.filter-bar input[type="text"] { flex: 1; min-width: 220px; }
.filter-bar select { min-width: 140px; cursor: pointer; }
.prod-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 30px; }
.prod-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: .25s; display: flex; flex-direction: column; }
.prod-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.prod-img { height: 150px; background: #f0f4fa; display: flex; align-items: center; justify-content: center; }
.prod-img img { height: 100%; width: 100%; object-fit: contain; }
.prod-body { padding: 16px; flex: 1; display: flex; flex-direction: column; }
.prod-body h3 { font-size: 15.5px; color: var(--navy-800); line-height: 1.4; }
.prod-meta { font-size: 13px; color: var(--text-sub); margin: 8px 0; }
.prod-meta b { color: var(--text-main); font-weight: 600; }
.tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 10px; }
.tag { font-size: 11.5px; padding: 2px 9px; border-radius: 20px; background: var(--blue-100); color: var(--blue-600); }
.tag.origin { background: #e8f5ee; color: #158a54; }
.prod-foot { display: flex; justify-content: space-between; align-items: center; margin-top: auto; padding-top: 10px; border-top: 1px dashed var(--border); }
.price { color: #e0484f; font-weight: 700; font-size: 16px; }
.price.inq { color: var(--blue-600); font-size: 14px; }
.pager { display: flex; justify-content: center; align-items: center; gap: 8px; margin: 36px 0 10px; }
.pager button { padding: 8px 16px; border: 1px solid var(--border); background: #fff; border-radius: 8px; cursor: pointer; color: var(--text-main); }
.pager button:disabled { opacity: .4; cursor: not-allowed; }
.pager button.cur { background: var(--blue-600); border-color: var(--blue-600); color: #fff; }
.pager .info { color: var(--text-sub); font-size: 13.5px; padding: 0 10px; }

/* ---------- 详情页 ---------- */
.detail-wrap { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 34px; display: grid; grid-template-columns: 360px 1fr; gap: 40px; margin-top: -30px; position: relative; z-index: 5; }
.detail-img { background: #f0f4fa; border-radius: 10px; display: flex; align-items: center; justify-content: center; padding: 20px; }
.detail-info h1 { font-size: 24px; color: var(--navy-800); margin-bottom: 6px; }
.detail-info .sub { color: var(--text-sub); margin-bottom: 18px; }
.spec-table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px; }
.spec-table td { border: 1px solid var(--border); padding: 9px 14px; }
.spec-table td:first-child { background: #f7fafd; color: var(--text-sub); width: 110px; }
.detail-desc { color: var(--text-sub); font-size: 14.5px; border-top: 1px solid var(--border); padding-top: 16px; }
.detail-actions { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }
.back-link { display: inline-block; margin: 20px 0; color: var(--text-sub); font-size: 14px; }

/* ---------- 关于页 / 团队页 ---------- */
.about-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 34px; margin-bottom: 24px; }
.about-card h2 { color: var(--navy-800); font-size: 22px; margin-bottom: 12px; padding-left: 14px; border-left: 4px solid var(--blue-500); }
.about-card p { color: var(--text-sub); }
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 20px; }
.cert-card { background: linear-gradient(160deg, var(--navy-900), var(--navy-700)); color: #fff; border-radius: var(--radius); padding: 26px 20px; text-align: center; }
.cert-card b { font-size: 22px; letter-spacing: 1px; display: block; color: var(--blue-400); }
.cert-card span { font-size: 13px; color: #b6c9ea; display: block; margin-top: 8px; }
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 30px; }
.team-card { background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); text-align: center; transition: .25s; }
.team-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.team-photo { width: 120px; height: 120px; border-radius: 50%; margin: 30px auto 14px; background: linear-gradient(135deg, var(--blue-500), var(--navy-700)); display: flex; align-items: center; justify-content: center; color: #fff; font-size: 34px; font-weight: 700; }
.team-card h3 { color: var(--navy-800); font-size: 18px; }
.team-card .role { color: var(--blue-600); font-size: 13.5px; margin: 4px 0 10px; }
.team-card .bio { color: var(--text-sub); font-size: 13.5px; padding: 0 20px 26px; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 24px; margin-top: 30px; }
.contact-info-card, .contact-form-card { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 32px; }
.contact-info-card h2, .contact-form-card h2 { color: var(--navy-800); font-size: 21px; margin-bottom: 20px; }
.c-row { display: flex; gap: 14px; margin-bottom: 20px; align-items: flex-start; }
.c-row .ic { width: 40px; height: 40px; min-width: 40px; border-radius: 10px; background: var(--blue-100); display: flex; align-items: center; justify-content: center; }
.c-row b { display: block; font-size: 14px; color: var(--navy-800); }
.c-row span { color: var(--text-sub); font-size: 14px; }
.contact-btns { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.btn-qq { background: #12b7f5; color: #fff; }
.btn-qq:hover { background: #0ea5e9; }
.btn-wx { background: #2aae67; color: #fff; }
.btn-wx:hover { background: #249a5b; }
.form-item { margin-bottom: 16px; }
.form-item label { display: block; font-size: 14px; color: var(--navy-800); margin-bottom: 6px; font-weight: 600; }
.form-item input, .form-item textarea {
  width: 100%; padding: 11px 14px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit; color: var(--text-main);
}
.form-item input:focus, .form-item textarea:focus { outline: none; border-color: var(--blue-500); box-shadow: 0 0 0 3px rgba(59,130,246,.15); }
.form-item textarea { min-height: 120px; resize: vertical; }
.form-msg { margin-top: 14px; font-size: 14px; display: none; padding: 10px 14px; border-radius: 8px; }
.form-msg.ok { display: block; background: #e8f5ee; color: #158a54; }
.form-msg.err { display: block; background: #fdecec; color: #d64545; }

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(8, 18, 38, .6); z-index: 200;
  display: none; align-items: center; justify-content: center;
}
.modal-mask.show { display: flex; }
.modal-box { background: #fff; border-radius: 14px; padding: 30px 34px; text-align: center; max-width: 320px; width: 90%; position: relative; }
.modal-box h3 { color: var(--navy-800); margin-bottom: 16px; }
.modal-box p { color: var(--text-sub); font-size: 13.5px; margin-top: 12px; }
.modal-close { position: absolute; top: 8px; right: 14px; border: 0; background: none; font-size: 26px; color: #98a7bd; cursor: pointer; }

/* ---------- 后台 ---------- */
.admin-wrap { max-width: 1100px; margin: 30px auto 60px; padding: 0 20px; }
.admin-login { max-width: 380px; margin: 80px auto; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 36px; }
.admin-login h1 { color: var(--navy-800); font-size: 22px; text-align: center; margin-bottom: 24px; }
.admin-tabs { display: flex; gap: 10px; margin-bottom: 20px; }
.admin-tabs button { padding: 10px 24px; border: 1px solid var(--border); background: #fff; border-radius: 8px; cursor: pointer; font-size: 15px; }
.admin-tabs button.cur { background: var(--blue-600); color: #fff; border-color: var(--blue-600); }
.admin-panel { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; }
.admin-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 10px; }
.admin-top h2 { color: var(--navy-800); font-size: 19px; }
.data-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.data-table th, .data-table td { border-bottom: 1px solid var(--border); padding: 10px 8px; text-align: left; }
.data-table th { color: var(--text-sub); font-weight: 600; background: #f7fafd; white-space: nowrap; }
.data-table tr.unread td { background: #f0f6ff; }
.op-btn { border: 0; border-radius: 6px; padding: 5px 12px; font-size: 12.5px; cursor: pointer; margin-right: 6px; }
.op-btn.edit { background: var(--blue-100); color: var(--blue-600); }
.op-btn.del { background: #fdecec; color: #d64545; }
.op-btn.read { background: #e8f5ee; color: #158a54; }
.msg-content-cell { max-width: 380px; white-space: pre-wrap; }

/* 模态表单 */
.admin-modal { position: fixed; inset: 0; background: rgba(8,18,38,.55); z-index: 210; display: none; align-items: flex-start; justify-content: center; overflow-y: auto; padding: 40px 16px; }
.admin-modal.show { display: flex; }
.admin-modal .modal-box { max-width: 640px; width: 100%; text-align: left; }
.admin-modal .modal-box h3 { margin-bottom: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--navy-900); color: #9db3d6; margin-top: 60px; padding: 50px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr 1fr; gap: 34px; padding-bottom: 40px; }
.footer-grid h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-grid a { display: block; color: #9db3d6; font-size: 13.5px; padding: 3px 0; }
.footer-grid a:hover { color: #fff; }
.footer-grid p { font-size: 13.5px; padding: 3px 0; }
.footer-brand .logo-text.light { color: #fff; font-size: 20px; font-weight: 700; margin-bottom: 10px; }
.footer-en { font-size: 12px !important; color: #6d84aa !important; }
.footer-tel { color: var(--blue-400) !important; font-size: 20px !important; font-weight: 700; }
.footer-social { display: flex; gap: 10px; margin-top: 12px; }
.footer-social a { background: rgba(255,255,255,.08); border-radius: 6px; padding: 7px 16px; font-size: 13px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0; font-size: 12.5px; }
.footer-bottom .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ---------- 单页锚点定位补偿（固定头部） ---------- */
section[id] { scroll-margin-top: 76px; }

/* ---------- 1. 公司介绍 Hero ---------- */
.hero-home {
  background: linear-gradient(135deg, #0b1e3f 0%, #16356b 55%, #2563eb 130%);
  color: #fff; padding: 84px 0 78px; position: relative; overflow: hidden;
}
.hero-home::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 88% 18%, rgba(96,165,250,.26), transparent 42%),
    radial-gradient(circle at 6% 88%, rgba(37,99,235,.32), transparent 46%);
}
.hero-home .container { position: relative; }
.hero-home-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px; align-items: center; }
.eyebrow {
  display: inline-block; font-size: 12.5px; letter-spacing: 2px; color: #93c5fd;
  border: 1px solid rgba(147,197,253,.45); border-radius: 20px;
  padding: 5px 15px; margin-bottom: 18px;
}
.hero-home-text h1 { font-size: 38px; line-height: 1.28; margin-bottom: 18px; }
.hero-home-text .lead { font-size: 17px; color: #dbe7fb; margin-bottom: 12px; }
.hero-home-text p { color: #b9cbe8; font-size: 15px; margin-bottom: 12px; max-width: 680px; }
.hero-home-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.stat-box {
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.15);
  border-radius: 12px; padding: 20px 18px; text-align: center;
}
.stat-box b { display: block; font-size: 30px; color: #fff; line-height: 1.2; }
.stat-box span { display: block; font-size: 13px; color: #9db8e5; margin-top: 4px; }

/* ---------- 2. 主营产品 ---------- */
.group-title {
  display: flex; align-items: center; gap: 14px;
  font-size: 17px; color: var(--navy-800); margin: 34px 0 18px;
}
.group-title span { white-space: nowrap; }
.group-title::after { content: ""; flex: 1; height: 1px; background: var(--border); }
.brand-card-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.brand-card-grid.dom { grid-template-columns: repeat(2, 1fr); max-width: 464px; }
.brand-card {
  background: #fff; border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden; transition: .25s; text-align: center;
}
.brand-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); border-color: var(--blue-400); }
.brand-logo-box {
  height: 82px; background: #f7fafd; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center; padding: 14px 18px;
}
.brand-logo-box img { max-height: 40px; width: auto; max-width: 100%; object-fit: contain; }
.brand-card h4 { font-size: 15.5px; color: var(--navy-800); margin-top: 14px; }
.brand-en { display: block; font-size: 11.5px; color: #93a2ba; letter-spacing: .3px; margin-top: 3px; }
.brand-card p { font-size: 12.5px; color: var(--text-sub); margin: 8px 12px 16px; line-height: 1.55; }

/* ---------- 3. 品质管理 ---------- */
.q-hero {
  background: linear-gradient(135deg, var(--navy-900), var(--navy-700));
  color: #fff; border-radius: 14px; padding: 32px 34px; margin-bottom: 22px;
  display: grid; grid-template-columns: 1fr 1.15fr; gap: 34px; align-items: center;
}
.q-hero-text h3 { font-size: 22px; margin-bottom: 10px; }
.q-hero-text p { color: #b6c9ea; font-size: 14.5px; }
.q-flow { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 0; padding: 0; }
.q-flow li {
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16);
  border-radius: 10px; padding: 14px 10px; text-align: center;
}
.q-flow b { display: block; font-size: 18px; color: var(--blue-400); letter-spacing: 1px; }
.q-flow span { display: block; font-size: 13px; color: #cddcf3; margin-top: 5px; }

.q-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.q-card {
  background: #fff; border: 1px solid var(--border); border-top: 3px solid var(--blue-500);
  border-radius: 12px; padding: 26px;
}
.q-card h3 { font-size: 18px; color: var(--navy-800); margin-bottom: 8px; }
.q-lead { font-size: 13.5px; color: var(--text-sub); margin-bottom: 14px; }
.q-list { margin: 0; padding-left: 20px; }
.q-list li { font-size: 13.5px; color: var(--text-main); margin-bottom: 8px; line-height: 1.6; }
.q-tags { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; }
.q-tags li {
  font-size: 12.5px; padding: 5px 13px; border-radius: 20px;
  background: var(--blue-100); color: var(--blue-600);
}

/* ---------- 4. 联系我们 ---------- */
.c-strong { font-size: 16px; font-weight: 700; color: var(--navy-800); }
a.c-strong:hover { color: var(--blue-600); }
.wx-line { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.copy-btn {
  border: 1px solid var(--blue-400); background: #fff; color: var(--blue-600);
  border-radius: 6px; padding: 3px 12px; font-size: 12.5px; cursor: pointer; transition: .2s;
}
.copy-btn:hover { background: var(--blue-100); }
.copy-btn.done { background: #e8f5ee; border-color: #158a54; color: #158a54; }
.footer-link { color: var(--blue-400); }
.footer-link:hover { color: #fff; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-home-grid { grid-template-columns: 1fr; gap: 34px; }
  .q-hero { grid-template-columns: 1fr; gap: 24px; }
  .q-grid { grid-template-columns: 1fr; }
  .brand-card-grid { grid-template-columns: repeat(3, 1fr); }
  .brand-card-grid.dom { grid-template-columns: repeat(2, 1fr); max-width: 100%; }
}
@media (max-width: 768px) {
  .hero-home { padding: 56px 0 48px; }
  .hero-home-text h1 { font-size: 26px; }
  .hero-home-text .lead { font-size: 15.5px; }
  .q-flow { grid-template-columns: repeat(2, 1fr); }
  .brand-card-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-box b { font-size: 24px; }
}
@media (max-width: 420px) {
  .brand-card-grid, .brand-card-grid.dom { grid-template-columns: 1fr; }
  .hero-home-stats { grid-template-columns: repeat(2, 1fr); }
}
  .cat-grid, .brand-grid { grid-template-columns: repeat(3, 1fr); }
  .net-grid, .adv-grid, .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .prod-grid { grid-template-columns: repeat(3, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .intro-grid, .contact-grid, .detail-wrap { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  body { padding-top: 58px; }
  .header-inner { height: 58px; }
  .menu-btn { display: flex; }
  .main-nav {
    display: none; position: absolute; top: 58px; left: 0; right: 0;
    background: var(--navy-900); flex-direction: column; padding: 12px 20px 20px; gap: 6px;
    box-shadow: 0 12px 20px rgba(0,0,0,.3);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px; }
  .hero h1 { font-size: 28px; }
  .hero p.sub { font-size: 15px; }
  .hero { padding: 60px 0 46px; }
  .hero-stats { gap: 22px; }
  .hero-stats b { font-size: 22px; }
  .cat-grid, .brand-grid { grid-template-columns: repeat(2, 1fr); }
  .net-grid, .adv-grid, .cert-grid, .team-grid, .prod-grid, .form-row { grid-template-columns: 1fr; }
  .prod-grid { grid-template-columns: repeat(2, 1fr); }
  section.block { padding: 46px 0; }
  .sec-head h2 { font-size: 23px; }
  .detail-wrap, .contact-info-card, .contact-form-card, .about-card { padding: 22px; }
  .filter-bar { flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 420px) {
  .prod-grid { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
}