/* 东丞 EASTtime 官网样式 v3 —— 明亮品质版（样板A）：白/浅灰分节、近黑正文、单宝蓝强调
   规律来自同行实测（史密斯/方太/沁园/立升）：大牌全是浅底黑字，深色只留页脚与CTA；
   纯静态底线不变：无重JS、图标全内联SVG、爬虫可抓 */
:root {
  --navy: #082c47;
  --navy-2: #0a3557;
  --blue: #0a6ebd;
  --blue-deep: #085a9e;
  --ink: #1f2937;
  --ink-strong: #111827;
  --muted: #64748b;
  --line: #e5eaf0;
  --bg-soft: #e9eef4;
  --chip-bg: #e8f2fb;
  --shadow: 0 4px 10px rgba(16, 42, 67, 0.07), 0 18px 40px rgba(16, 42, 67, 0.10);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", sans-serif;
  color: var(--ink);
  line-height: 1.8;
  background: #fff;
}
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: none; }
img { max-width: 100%; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* ===== 顶栏：白底细线 ===== */
.site-header { background: rgba(255,255,255,.94); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 50; backdrop-filter: blur(8px); }
.header-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; padding: 12px 0; }
.brand { font-size: 25px; font-weight: 800; color: var(--ink-strong); letter-spacing: 2px; }
.brand-logo { height: 44px; width: auto; display: block; }
.brand small { display: block; font-weight: 500; color: #111827; font-size: 12px; letter-spacing: 1px; margin-top: -2px; }
@media (max-width: 640px) { .brand-logo { height: 34px; } }
nav.main-nav ul { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; }
nav.main-nav a { display: block; padding: 9px 16px; color: #374151; font-size: 15.5px; border-radius: 999px; font-weight: 500; }
nav.main-nav a:hover { color: var(--blue); background: var(--bg-soft); }
nav.main-nav a[aria-current="page"] { color: var(--blue-deep); background: var(--chip-bg); font-weight: 600; }

/* ===== 首屏（亮色大字版）===== */
.hero {
  position: relative;
  background:
    radial-gradient(1000px 420px at 50% -80px, #eaf4fd 0%, rgba(234,244,253,0) 68%),
    #fff;
  color: var(--ink);
  padding: 96px 0 140px;
  overflow: hidden;
  text-align: left;
}
.hero .kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600; letter-spacing: 2px;
  color: var(--blue-deep); background: var(--chip-bg);
  border-radius: 999px; padding: 7px 18px; margin-bottom: 24px;
}
.hero .kicker::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--blue); }
.hero h1 { font-size: clamp(34px, 4.8vw, 52px); line-height: 1.28; font-weight: 800; letter-spacing: 1px; color: var(--ink-strong); max-width: 820px; }
.hero h1 .accent { color: var(--blue); }
.hero p.sub { font-size: 17.5px; color: var(--muted); margin-top: 20px; max-width: 700px; }
.hero .cta { margin-top: 36px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero .wave { position: absolute; left: 0; right: 0; bottom: -1px; width: 100%; display: block; }

/* 按钮 */
.btn { display: inline-block; padding: 13px 32px; border-radius: 999px; font-size: 16px; font-weight: 600; transition: all .2s; }
.btn-primary { background: var(--blue); color: #fff; box-shadow: 0 6px 18px rgba(10,110,189,.28); }
.btn-primary:hover { background: var(--blue-deep); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(10,110,189,.35); color: #fff; }
.btn-ghost { border: 1.5px solid #bcd7ef; color: var(--blue); background: #fff; }
.btn-ghost:hover { background: var(--chip-bg); color: var(--blue-deep); }
.btn-blue { border: 1.5px solid var(--blue); color: var(--blue); }
.btn-blue:hover { background: var(--blue); color: #fff; }

/* ===== 数据带：浅灰底 + 白卡大数字 ===== */
.stats { position: relative; z-index: 5; background: var(--bg-soft); padding: 54px 0 30px; }
.stats .grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 26px 16px; text-align: center; box-shadow: 0 1px 2px rgba(16,42,67,.05), 0 10px 28px rgba(16,42,67,.06); }
.stat .num { font-size: 44px; font-weight: 800; color: var(--navy); line-height: 1.15; letter-spacing: -0.5px; }
.stat .num small { font-size: 19px; font-weight: 700; color: var(--blue); margin-left: 2px; }
.stat .label { font-size: 14px; color: var(--muted); margin-top: 6px; }

/* ===== 区块：白/浅灰交替 ===== */
section.block { padding: 72px 0; }
section.block.alt { background: var(--bg-soft); }
h2.sec-title { font-size: 33px; color: var(--ink-strong); margin-bottom: 6px; font-weight: 800; letter-spacing: 1px; }
.sec-title::after { content: ""; display: block; width: 56px; height: 4px; border-radius: 2px; background: var(--blue); margin-top: 12px; }
p.sec-desc { color: var(--muted); margin-bottom: 32px; font-size: 16px; }

/* 卡片（带图标） */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 30px 26px; transition: all .25s; box-shadow: 0 1px 2px rgba(16,42,67,.05); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card .icon { width: 52px; height: 52px; border-radius: 12px; background: var(--chip-bg); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.card .icon svg { width: 28px; height: 28px; stroke: var(--blue); }
.card h3 { font-size: 18px; color: var(--ink-strong); margin-bottom: 8px; font-weight: 700; }
.card p { font-size: 14.5px; color: var(--muted); }

/* 参数表 */
table.spec { width: 100%; border-collapse: separate; border-spacing: 0; margin: 16px 0; font-size: 14.5px; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: #fff; }
table.spec th, table.spec td { padding: 12px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
table.spec tr:last-child th, table.spec tr:last-child td { border-bottom: none; }
table.spec th { background: var(--bg-soft); color: var(--ink-strong); white-space: nowrap; font-weight: 700; }

/* FAQ */
.faq-item { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 22px 26px; margin-bottom: 16px; transition: box-shadow .2s; }
.faq-item:hover { box-shadow: var(--shadow); }
.faq-item h3 { font-size: 17.5px; color: var(--ink-strong); margin-bottom: 10px; font-weight: 700; }
.faq-item h3::before { content: "Q"; display: inline-block; width: 26px; height: 26px; line-height: 26px; text-align: center; background: var(--chip-bg); color: var(--blue); border-radius: 8px; font-size: 14px; font-weight: 800; margin-right: 10px; }
.faq-item .answer { color: #44576a; font-size: 15px; }
.faq-item .answer p { margin-bottom: 8px; }

/* 图示（纯SVG原理图，爬虫可抓） */
figure.diagram { margin: 28px 0; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 22px 16px 12px; box-shadow: 0 1px 2px rgba(16,42,67,.05); }
figure.diagram svg { width: 100%; height: auto; display: block; }
figure.diagram figcaption { text-align: center; font-size: 13.5px; color: var(--muted); padding: 10px 0 6px; }
figure.diagram img { width: 100%; height: auto; display: block; border-radius: 10px; }
figure.diagram.photo { max-width: 660px; margin-left: auto; margin-right: auto; }

/* 提示框 */
.note { background: #fff8e8; border: 1px solid #f0dfa8; border-radius: 10px; padding: 14px 18px; font-size: 14px; color: #7a6320; margin: 20px 0; }

/* 面包屑 */
.crumbs { font-size: 13.5px; color: var(--muted); padding: 18px 0 0; }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--blue); }

/* 内页横幅：亮色版 */
.page-hero { background: radial-gradient(900px 260px at 50% -60px, #e8f2fb 0%, rgba(232,242,251,0) 70%), var(--bg-soft); border-bottom: 1px solid var(--line); color: var(--ink); padding: 46px 0 42px; }
.page-hero h1 { font-size: 32px; font-weight: 800; letter-spacing: 1px; color: var(--ink-strong); }
.page-hero p { color: var(--muted); margin-top: 8px; max-width: 760px; }
.page-hero .crumbs, .page-hero .crumbs a { color: var(--muted); }
.page-hero + section.block { padding-top: 48px; }

/* CTA 横带：保留深色一处做品牌收口 */
.cta-band { background: linear-gradient(120deg, var(--navy-2), var(--blue)); border-radius: 16px; color: #fff; padding: 44px 48px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.cta-band h3 { font-size: 24px; font-weight: 800; letter-spacing: 1px; }
.cta-band p { color: rgba(255,255,255,.85); margin-top: 6px; }
.cta-band .btn-primary { background: #fff; color: var(--navy); box-shadow: none; }
.cta-band .btn-primary:hover { background: #eaf3fb; transform: none; }

/* 页脚 */
.site-footer { background: var(--navy); color: #a9bccb; margin-top: 72px; padding: 48px 0 28px; font-size: 14px; }
.site-footer a { color: #cfe6f7; }
.site-footer .foot-brand { font-size: 22px; color: #fff; font-weight: 800; letter-spacing: 2px; margin-bottom: 10px; }
.site-footer .cols { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; margin-bottom: 28px; }
.site-footer .cols h4 { color: #fff; font-size: 15px; margin-bottom: 10px; }
.site-footer .cols p, .site-footer .cols li { line-height: 2; }
.site-footer .cols ul { list-style: none; }
.site-footer .icp { margin-top: 6px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.12); color: #7d94a7; font-size: 13px; }

@media (max-width: 860px) {
  .grid-3, .grid-2, .grid-4 { grid-template-columns: 1fr; }
  .stats .grid { grid-template-columns: repeat(2, 1fr); }
  .hero { padding: 60px 0 110px; }
  .header-inner { justify-content: center; }
  .site-footer .cols { grid-template-columns: 1fr; }
  .cta-band { padding: 32px 24px; }
  h2.sec-title { font-size: 27px; }
}