/* ============================================================
   iCentech 中文站 样式表
   设计目标：专业、可信、面向"中国企业出海"的 B2B 气质
   配色：深海军蓝（信任） + 暖橙（行动） + 青绿（技术）
   ============================================================ */

:root {
  --navy: #0f3d6e;
  --navy-deep: #0a2f57;
  --navy-soft: #1c5a9c;
  --accent: #e8893b;
  --accent-dark: #cf6f24;
  --teal: #1f9e8f;
  --ink: #1c2733;
  --muted: #5b6b7b;
  --line: #e3e9f0;
  --bg: #f6f9fc;
  --bg-soft: #eef3f9;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 61, 110, 0.08);
  --shadow-lg: 0 18px 48px rgba(15, 61, 110, 0.14);
  --maxw: 1140px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--navy); text-decoration: none; transition: color .2s; }
a:hover { color: var(--accent); }

img { max-width: 100%; display: block; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 66px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 20px; color: var(--navy); letter-spacing: .3px; }
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--accent); display: inline-block; }
.brand small { font-weight: 500; color: var(--muted); font-size: 12px; margin-left: 2px; }
.brand-logo img { height: 38px; width: auto; display: block; }
.brand-logo span { display: inline-flex; align-items: baseline; }

.nav-links { display: flex; align-items: center; gap: 26px; }
.nav-links a { color: var(--ink); font-weight: 600; font-size: 15px; }
.nav-links a.active, .nav-links a:hover { color: var(--navy); }
.nav-links a.active { position: relative; }
.nav-links a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -22px; height: 3px; background: var(--accent); border-radius: 3px;
}

.nav-right { display: flex; align-items: center; gap: 14px; }
.lang-switch {
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px;
  font-size: 13px; font-weight: 600; color: var(--muted);
}
.lang-switch:hover { border-color: var(--navy); color: var(--navy); }

.btn {
  display: inline-block; background: var(--accent); color: #fff;
  padding: 11px 22px; border-radius: 999px; font-weight: 700; font-size: 15px;
  border: none; cursor: pointer; transition: background .2s, transform .15s;
}
.btn:hover { background: var(--accent-dark); color: #fff; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--navy); border: 1.5px solid var(--navy); }
.btn-ghost:hover { background: var(--navy); color: #fff; }
.btn-navy { background: var(--navy); }
.btn-navy:hover { background: var(--navy-deep); }

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

/* 服务下拉 */
.nav-item { position: relative; }
.nav-item > a { display: inline-flex; align-items: center; gap: 4px; }
.caret { font-size: 10px; opacity: .7; }
.dropdown {
  position: absolute; top: 100%; left: 0; margin-top: 0;
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow); padding: 8px; min-width: 210px; display: none; z-index: 60;
}
/* 透明桥接条：填补导航与面板之间的 14px 空隙，保证鼠标移动过程中 :hover 不断开 */
.dropdown::before {
  content: ""; position: absolute; top: -14px; left: 0; right: 0; height: 14px;
}
.nav-item:hover .dropdown, .nav-item:focus-within .dropdown { display: block; }
.dropdown a { display: block; padding: 9px 12px; border-radius: 8px; color: var(--ink); font-size: 14px; font-weight: 600; white-space: nowrap; }
.dropdown a:hover { background: var(--bg-soft); color: var(--navy); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--navy-deep) 0%, var(--navy) 55%, var(--navy-soft) 100%);
  color: #fff; padding: 78px 0 86px; position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; right: -120px; top: -120px; width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(232,137,59,.35), transparent 70%);
}
.hero .container { position: relative; z-index: 1; }
.hero h1 { font-size: clamp(30px, 4.4vw, 50px); line-height: 1.25; margin: 0 0 18px; font-weight: 800; }
.hero p.lead { font-size: clamp(16px, 1.6vw, 20px); color: #d8e6f5; max-width: 720px; margin: 0 0 30px; }
.hero .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero .pill {
  display: inline-flex; align-items: center; gap: 8px; background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25); color: #fff; padding: 7px 16px; border-radius: 999px; font-size: 14px; font-weight: 600;
}
.hero-stats { display: flex; gap: 40px; margin-top: 46px; flex-wrap: wrap; }
.hero-stats .stat .num { font-size: 30px; font-weight: 800; color: #fff; }
.hero-stats .stat .lbl { font-size: 14px; color: #bcd2e8; }

/* ---------- 通用区块 ---------- */
.section { padding: 72px 0; }
.section.alt { background: var(--white); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 46px; }
.section-head .eyebrow { color: var(--accent); font-weight: 700; letter-spacing: 2px; font-size: 13px; text-transform: uppercase; }
.section-head h2 { font-size: clamp(26px, 3vw, 36px); margin: 10px 0 12px; color: var(--navy); }
.section-head p { color: var(--muted); font-size: 17px; margin: 0; }

/* 卡片网格 */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-6 { grid-template-columns: repeat(3, 1fr); }

.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s, border-color .2s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: #cdddf0; }
.card .ico {
  width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center;
  background: var(--bg-soft); color: var(--navy); font-size: 22px; margin-bottom: 14px;
}
.card h3 { margin: 0 0 8px; font-size: 19px; color: var(--navy); }
.card p { margin: 0 0 14px; color: var(--muted); font-size: 15px; }
.card .more { font-weight: 700; font-size: 14px; color: var(--accent); }
.card-link { color: inherit; }
.card-link:hover { color: inherit; }

/* 能力列表 */
.cap-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cap {
  background: linear-gradient(180deg, #fff, #fbfdff); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px; text-align: center;
}
.cap .cap-ico { font-size: 30px; }
.cap h4 { margin: 10px 0 6px; color: var(--navy); font-size: 17px; }
.cap p { margin: 0; color: var(--muted); font-size: 14px; }

/* 认证条 */
.certs { display: flex; gap: 26px; flex-wrap: wrap; justify-content: center; margin-top: 30px; }
.cert {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 30px; text-align: center; min-width: 240px; box-shadow: var(--shadow);
}
.cert .badge { font-size: 26px; }
.cert .t { font-weight: 800; color: var(--navy); margin-top: 6px; }
.cert .d { color: var(--muted); font-size: 14px; margin-top: 4px; }

/* 博客 */
.blog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.blog-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); display: flex; flex-direction: column; transition: transform .2s, box-shadow .2s;
}
.blog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.blog-card .thumb { height: 150px; background: linear-gradient(135deg, var(--navy), var(--teal)); display: grid; place-items: center; color: #fff; font-size: 34px; }
.blog-card .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* 正文头部题图 */
.article-hero { margin: 20px 0 28px; border-radius: var(--radius); overflow: hidden; box-shadow: 0 8px 24px rgba(15,61,110,.14); }
.article-hero img { display: block; width: 100%; height: auto; }
.blog-card .body { padding: 20px 20px 22px; display: flex; flex-direction: column; flex: 1; }
.blog-card .cat { font-size: 12px; color: var(--accent); font-weight: 700; letter-spacing: 1px; }
.blog-card h3 { font-size: 18px; margin: 8px 0 10px; color: var(--navy); line-height: 1.4; }
.blog-card p.ex { color: var(--muted); font-size: 14px; margin: 0 0 14px; flex: 1; }
.blog-card .meta { font-size: 13px; color: var(--muted); }

/* CTA 区 */
.cta {
  background: linear-gradient(135deg, var(--navy), var(--navy-deep));
  color: #fff; border-radius: 20px; padding: 48px; text-align: center; margin: 0 auto;
}
.cta h2 { color: #fff; margin: 0 0 12px; font-size: 30px; }
.cta p { color: #cfe0f2; font-size: 17px; margin: 0 0 26px; }

/* 面包屑 */
.crumb { font-size: 14px; color: var(--muted); padding: 18px 0 0; }
.crumb a { color: var(--muted); }
.crumb a:hover { color: var(--navy); }

/* ---------- 内页通用 ---------- */
.page-hero { background: linear-gradient(135deg, var(--navy-deep), var(--navy)); color: #fff; padding: 54px 0; }
.page-hero h1 { margin: 0 0 10px; font-size: clamp(26px, 3vw, 38px); }
.page-hero p { margin: 0; color: #cfe0f2; max-width: 760px; font-size: 17px; }

.prose { max-width: 820px; margin: 0 auto; }
.prose h2 { color: var(--navy); font-size: 26px; margin: 40px 0 14px; }
.prose h3 { color: var(--navy); font-size: 21px; margin: 30px 0 10px; }
.prose p { margin: 0 0 16px; color: #2a3744; }
.prose ul, .prose ol { margin: 0 0 18px; padding-left: 22px; color: #2a3744; }
.prose li { margin: 6px 0; }
.prose blockquote {
  border-left: 4px solid var(--accent); background: var(--bg-soft); margin: 22px 0;
  padding: 14px 20px; border-radius: 0 10px 10px 0; color: #33414f; font-style: normal;
}
.prose strong { color: var(--navy); }
.media-email { font-size: 22px; font-weight: 700; color: var(--navy); letter-spacing: .3px; margin: 10px 0 18px; word-break: break-all; }

/* 流程步骤 */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 26px; }
.step { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.step .n { width: 34px; height: 34px; border-radius: 50%; background: var(--navy); color: #fff; display: grid; place-items: center; font-weight: 800; margin-bottom: 10px; }
.step h4 { margin: 0 0 6px; color: var(--navy); font-size: 16px; }
.step p { margin: 0; color: var(--muted); font-size: 14px; }

/* 数据表 */
.table-wrap { overflow-x: auto; margin: 20px 0; }
table.tbl { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; }
table.tbl th, table.tbl td { padding: 13px 16px; border-bottom: 1px solid var(--line); text-align: left; font-size: 15px; }
table.tbl th { background: var(--bg-soft); color: var(--navy); font-weight: 700; }
table.tbl tr:last-child td { border-bottom: none; }

/* ---------- 文章页 ---------- */
.article { max-width: 800px; margin: 0 auto; }
.article .meta { color: var(--muted); font-size: 14px; margin: 6px 0 26px; }
.article .cat { color: var(--accent); font-weight: 700; }
.article-share { margin-top: 40px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--navy-deep); color: #cfe0f2; padding: 54px 0 26px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 30px; }
.footer-grid h4 { color: #fff; font-size: 15px; margin: 0 0 14px; letter-spacing: .5px; }
.footer-grid a { color: #bcd2e8; display: block; margin: 8px 0; font-size: 14px; }
.footer-grid a:hover { color: #fff; }
.footer-grid .brand { color: #fff; margin-bottom: 12px; }
.footer-grid p { color: #9fb6d0; font-size: 14px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); margin-top: 34px; padding-top: 18px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 13px; color: #9fb6d0; }
.footer-bottom a { color: #bcd2e8; }
.wecom-box {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.18);
  border-radius: 14px; padding: 22px 26px; margin: 28px 0 0;
}
.wecom-box h3 { color: #fff; margin: 0 0 8px; font-size: 18px; }
.wecom-box p { color: #bcd2e8; font-size: 14px; margin: 0; max-width: 620px; line-height: 1.6; }
.qr-placeholder {
  flex: 0 0 auto; width: 130px; height: 130px;
  border: 2px dashed rgba(255,255,255,.35); border-radius: 10px;
  display: grid; place-items: center; text-align: center;
  color: #9fb6d0; font-size: 12px; line-height: 1.5; padding: 8px;
  background: rgba(255,255,255,.03);
}
@media (max-width: 600px){ .wecom-box{ flex-direction: column; align-items: flex-start; } }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .grid-3, .grid-6, .blog-grid, .cap-list { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 760px) {
  .nav-links {
    position: absolute; top: 66px; left: 0; right: 0; background: #fff; flex-direction: column;
    gap: 0; padding: 8px 0; border-bottom: 1px solid var(--line); display: none; box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 22px; width: 100%; }
  .nav-links a.active::after { display: none; }
  .nav-item { width: 100%; }
  .dropdown { position: static; box-shadow: none; border: none; display: block; padding: 0 0 0 14px; margin: 0; min-width: 0; }
  .dropdown a { padding: 9px 12px; }
  .menu-toggle { display: block; }
  .nav-right .btn { display: none; }
  .grid-3, .grid-6, .blog-grid, .cap-list, .grid-2 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
  .cta { padding: 32px 22px; }
}