/* ============ 加速IDC 官网样式（仿腾讯云首页版式） ============ */
:root {
  --primary: #0A5CFF;
  --primary-dark: #0747c8;
  --primary-light: #e8f0ff;
  --dark: #0b1526;
  --dark-2: #12203a;
  --text: #1f2733;
  --text-2: #5a6472;
  --border: #e3e8f0;
  --bg: #ffffff;
  --bg-gray: #f5f7fa;
  --success: #00a854;
  --warning: #faad14;
  --danger: #f5222d;
  --radius: 10px;
  --shadow: 0 6px 24px rgba(11, 21, 38, .08);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif; color: var(--text); background: var(--bg); font-size: 15px; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- 顶部导航 ---------- */
.nav { position: sticky; top: 0; z-index: 100; background: #fff; border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; height: 64px; gap: 18px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: var(--dark); }
.logo-badge { width: 36px; height: 36px; border-radius: 8px; background: linear-gradient(135deg, var(--primary), #2f88ff); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 15px; }
.logo small { font-weight: 400; color: var(--text-2); font-size: 12px; }
.nav-links { display: flex; gap: 0; flex: 1; }
.nav-links a { padding: 8px 11px; border-radius: 6px; color: var(--text); font-size: 15px; white-space: nowrap; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: var(--primary-light); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.user-chip { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-2); }
.avatar { width: 30px; height: 30px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), #2f88ff); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 600; }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 10px 24px; border-radius: 6px; font-size: 15px; border: 1px solid transparent; cursor: pointer; transition: all .2s; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { border-color: rgba(255,255,255,.6); color: #fff; background: transparent; }
.btn-outline:hover { background: rgba(255,255,255,.12); }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { box-shadow: var(--shadow); }
.btn-dark { background: var(--dark); color: #fff; }
.btn-dark:hover { background: var(--dark-2); }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-ghost { border-color: var(--border); color: var(--text); background: #fff; }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- 首屏 Hero ---------- */
.hero { position: relative; background: linear-gradient(120deg, #0a2a6b 0%, #0A5CFF 55%, #2f88ff 100%); color: #fff; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(255,255,255,.14) 1px, transparent 1px); background-size: 28px 28px; opacity: .35; }
.hero::after { content: ""; position: absolute; right: -120px; top: -120px; width: 420px; height: 420px; border-radius: 50%; background: rgba(255,255,255,.08); }
.hero-inner { position: relative; z-index: 1; padding: 90px 0 80px; max-width: 1200px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }
.hero-tag { display: inline-flex; align-items: center; gap: 6px; padding: 6px 14px; border-radius: 20px; background: rgba(255,255,255,.14); font-size: 13px; margin-bottom: 20px; }
.hero-title { font-size: 46px; font-weight: 800; line-height: 1.25; margin-bottom: 16px; letter-spacing: 1px; }
.hero-sub { font-size: 17px; color: rgba(255,255,255,.85); max-width: 640px; margin-bottom: 32px; }
.hero-actions { display: flex; gap: 14px; margin-bottom: 48px; }
.hero-stats { display: flex; gap: 48px; border-top: 1px solid rgba(255,255,255,.25); padding-top: 24px; }
.hero-stat b { font-size: 28px; font-weight: 800; display: block; }
.hero-stat span { font-size: 13px; color: rgba(255,255,255,.75); }

/* ---------- 通用区块 ---------- */
.section { padding: 72px 0; }
.section.gray { background: var(--bg-gray); }
.section-head { text-align: center; margin-bottom: 48px; }
.section-title { font-size: 30px; font-weight: 800; color: var(--dark); margin-bottom: 10px; }
.section-sub { color: var(--text-2); font-size: 15px; max-width: 720px; margin: 0 auto; }

/* ---------- 产品矩阵 ---------- */
.prod-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.prod-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 24px; transition: all .25s; position: relative; }
.prod-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--primary); }
.prod-hot { position: absolute; top: -1px; right: 16px; background: linear-gradient(135deg, #ff6b00, #ff9d00); color: #fff; font-size: 12px; padding: 4px 10px; border-radius: 0 0 6px 6px; }
.prod-icon { width: 52px; height: 52px; border-radius: 12px; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.prod-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.prod-en { font-size: 12px; color: var(--text-2); margin-bottom: 10px; }
.prod-desc { color: var(--text-2); font-size: 14px; margin-bottom: 14px; min-height: 42px; }
.prod-more { color: var(--primary); font-size: 14px; font-weight: 600; }

/* ---------- 解决方案 ---------- */
.sol-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.sol-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; transition: all .25s; }
.sol-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.sol-icon { width: 44px; height: 44px; border-radius: 10px; background: var(--dark); color: #fff; display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.sol-card h3 { font-size: 17px; margin-bottom: 8px; }
.sol-card p { font-size: 14px; color: var(--text-2); margin-bottom: 12px; }
.sol-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.sol-tags span { font-size: 12px; padding: 3px 10px; background: var(--bg-gray); border-radius: 20px; color: var(--text-2); }

/* ---------- 客户案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.case-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; transition: all .25s; }
.case-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.case-ind { display: inline-block; font-size: 12px; color: var(--primary); background: var(--primary-light); padding: 3px 10px; border-radius: 20px; margin-bottom: 12px; }
.case-card h3 { font-size: 15px; margin-bottom: 8px; }
.case-card p { font-size: 13px; color: var(--text-2); margin-bottom: 12px; }
.case-result { font-size: 13px; color: var(--success); }

/* ---------- 新闻列表 ---------- */
.news-list { max-width: 900px; margin: 0 auto; }
.news-item { display: flex; align-items: center; gap: 20px; padding: 20px 8px; border-bottom: 1px solid var(--border); transition: all .2s; }
.news-item:hover { padding-left: 16px; }
.news-date { flex: 0 0 90px; text-align: center; }
.news-date b { display: block; font-size: 24px; color: var(--primary); }
.news-date span { font-size: 12px; color: var(--text-2); }
.news-tag { font-size: 12px; background: var(--bg-gray); padding: 2px 8px; border-radius: 4px; color: var(--text-2); }
.news-item h3 { font-size: 16px; margin: 2px 0 4px; }
.news-item h3:hover { color: var(--primary); }
.news-item p { font-size: 13px; color: var(--text-2); }

/* ---------- CTA 条 ---------- */
.cta-band { background: linear-gradient(120deg, var(--dark), var(--dark-2)); color: #fff; padding: 56px 0; text-align: center; }
.cta-band h2 { font-size: 26px; margin-bottom: 10px; }
.cta-band p { color: rgba(255,255,255,.7); margin-bottom: 24px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--dark); color: #aeb6c4; padding: 56px 0 0; font-size: 14px; }
.footer-cols { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 36px; }
.footer-brand .logo { color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 13px; color: #7c8698; max-width: 320px; }
.footer-col h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-col a { display: block; padding: 5px 0; color: #aeb6c4; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 18px 0; display: flex; justify-content: space-between; font-size: 13px; color: #7c8698; }

/* ---------- 内页页头 ---------- */
.page-hero { background: linear-gradient(120deg, #0a2a6b, #0A5CFF); color: #fff; padding: 56px 0; }
.page-hero h1 { font-size: 32px; font-weight: 800; margin-bottom: 8px; }
.page-hero p { color: rgba(255,255,255,.8); max-width: 700px; }

/* ---------- 产品详情 ---------- */
.detail-layout { display: grid; grid-template-columns: 1fr 320px; gap: 28px; padding: 44px 0 64px; }
.detail-main { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; }
.detail-head { display: flex; gap: 18px; align-items: flex-start; margin-bottom: 24px; }
.detail-head .prod-icon { width: 64px; height: 64px; margin-bottom: 0; }
.detail-head h1 { font-size: 24px; }
.detail-head .prod-en { font-size: 13px; }
.spec-table { width: 100%; border-collapse: collapse; margin: 16px 0 24px; }
.spec-table td { border: 1px solid var(--border); padding: 12px 16px; font-size: 14px; }
.spec-table td:first-child { background: var(--bg-gray); color: var(--text-2); width: 140px; }
.feature-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 16px 0 24px; }
.feature-list li { display: flex; align-items: center; gap: 8px; font-size: 14px; }
.feature-list li::before { content: "✓"; color: var(--success); font-weight: 700; }
.side-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; }
.side-card h3 { font-size: 16px; margin-bottom: 12px; }
.side-price { font-size: 26px; font-weight: 800; color: var(--danger); margin-bottom: 16px; }
.side-price small { font-size: 13px; color: var(--text-2); font-weight: 400; }
.side-notes { font-size: 13px; color: var(--text-2); margin-top: 14px; line-height: 1.9; }

/* ---------- 表单 ---------- */
.form-card { max-width: 420px; margin: 48px auto; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; }
.form-card h1 { font-size: 22px; text-align: center; margin-bottom: 24px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 14px; margin-bottom: 6px; color: var(--text-2); }
.input, select.input, textarea.input { width: 100%; padding: 10px 14px; border: 1px solid var(--border); border-radius: 6px; font-size: 15px; font-family: inherit; background: #fff; }
.input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(10,92,255,.12); }
textarea.input { min-height: 120px; resize: vertical; }
.form-hint { font-size: 12px; color: var(--text-2); margin-top: 6px; }
.form-error { background: #fff1f0; color: var(--danger); font-size: 13px; padding: 8px 12px; border-radius: 6px; margin-bottom: 14px; display: none; }
.form-link { text-align: center; font-size: 14px; margin-top: 16px; color: var(--text-2); }
.form-link a { color: var(--primary); }
.contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 28px; padding: 44px 0 64px; }
.contact-info .info-row { display: flex; gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--border); }
.contact-info .info-row b { color: var(--dark); }

/* ---------- 个人中心 ---------- */
.account-layout { display: grid; grid-template-columns: 260px 1fr; gap: 28px; padding: 40px 0 64px; }
.account-side { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; height: fit-content; }
.account-side a { display: block; padding: 10px 14px; border-radius: 6px; color: var(--text-2); }
.account-side a.active, .account-side a:hover { background: var(--primary-light); color: var(--primary); }
.account-main { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; }
.panel-title { font-size: 18px; font-weight: 700; margin-bottom: 18px; }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; }
table.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th { background: var(--bg-gray); text-align: left; padding: 10px 12px; color: var(--text-2); font-weight: 600; white-space: nowrap; }
.table td { padding: 10px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
.table tr:hover td { background: #fafbfd; }

/* ---------- 状态徽章 ---------- */
.badge { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 12px; }
.badge-ok { background: #e6f7ec; color: var(--success); }
.badge-warn { background: #fff7e6; color: var(--warning); }
.badge-danger { background: #fff1f0; color: var(--danger); }
.badge-info { background: var(--primary-light); color: var(--primary); }
.badge-gray { background: var(--bg-gray); color: var(--text-2); }

/* ---------- 管理后台 ---------- */
.admin-body { background: var(--bg-gray); }
.admin-layout { display: grid; grid-template-columns: 220px 1fr; min-height: calc(100vh - 64px); }
.admin-side { background: var(--dark); color: #aeb6c4; padding: 20px 0; }
.admin-side .side-title { padding: 0 20px 12px; font-size: 12px; color: #6b7688; text-transform: uppercase; letter-spacing: 1px; }
.admin-side a { display: flex; align-items: center; gap: 10px; padding: 10px 20px; color: #aeb6c4; font-size: 14px; }
.admin-side a:hover, .admin-side a.active { background: rgba(255,255,255,.08); color: #fff; }
.admin-main { padding: 24px; }
.admin-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; margin-bottom: 20px; }
.admin-card h2 { font-size: 18px; margin-bottom: 16px; }
.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-bottom: 20px; }
.stat-box { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.stat-box b { font-size: 26px; color: var(--primary); display: block; }
.stat-box span { font-size: 13px; color: var(--text-2); }
.toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.row-actions a, .row-actions button { margin-right: 8px; font-size: 13px; background: none; border: none; cursor: pointer; color: var(--primary); }
.row-actions .del { color: var(--danger); }

/* ---------- Toast ---------- */
.toast { position: fixed; top: 80px; left: 50%; transform: translateX(-50%); background: var(--dark); color: #fff; padding: 10px 22px; border-radius: 6px; font-size: 14px; z-index: 999; opacity: 0; transition: all .3s; pointer-events: none; }
.toast.show { opacity: 1; top: 88px; }
.toast.err { background: var(--danger); }

/* ---------- 空状态 ---------- */
.empty { text-align: center; color: var(--text-2); padding: 40px 0; font-size: 14px; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .prod-grid, .sol-grid { grid-template-columns: repeat(2, 1fr); }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-title { font-size: 34px; }
  .detail-layout, .account-layout, .contact-grid { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .admin-layout { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .prod-grid, .sol-grid, .case-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
  .hero-title { font-size: 28px; }
}

/* ---------- 导航下拉菜单 ---------- */
.nav-drop { position: relative; }
.nav-drop > a { display: inline-flex; align-items: center; gap: 4px; }
.nav-drop .caret { font-size: 10px; transition: transform .2s; opacity: .55; }
.nav-drop:hover .caret { transform: rotate(180deg); opacity: 1; }
.nav-drop-menu { position: absolute; top: calc(100% + 6px); left: 0; min-width: 240px; background: #fff; border: 1px solid #e3e8f0; border-radius: 10px; box-shadow: 0 12px 32px rgba(10,40,100,.14); padding: 8px; opacity: 0; visibility: hidden; transform: translateY(8px); transition: all .18s ease; z-index: 60; }
.nav-drop-menu::before { content: ''; position: absolute; top: -8px; left: 0; right: 0; height: 8px; }
.nav-drop:hover .nav-drop-menu, .nav-drop:focus-within .nav-drop-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-drop-menu a { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 9px 12px; border-radius: 8px; color: var(--text); font-size: 14px; }
.nav-drop-menu a:hover { background: var(--primary-light); color: var(--primary); }
.nav-drop-menu a small { color: var(--text-2); font-size: 11px; white-space: nowrap; }

/* ---------- 语言切换 ---------- */
.lang-switch { font-size: 13px; padding: 6px 10px; border: 1px solid #e3e8f0; border-radius: 6px; color: var(--text-2); font-weight: 600; }
.lang-switch:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-light); }

/* ---------- 语言下拉 ---------- */
.lang-drop .nav-drop-menu { left: auto; right: 0; min-width: 136px; }
.lang-drop .nav-drop-menu a { font-size: 14px; }
.lang-drop .nav-drop-menu a.cur { color: var(--primary); background: var(--primary-light); font-weight: 600; }
.lang-drop > a { cursor: pointer; }