/* -------------------------------------------------------------------------
   视觉语言：杂志排版 + 高级质感。
   - 墨黑底 + 象牙白纸面 + 铜金细线（三色封顶，不堆色）
   - 标题用衢线（思源宋/宋体），正文用无衢线，大字重、宽留白
   - 不用任何第三方字体/图标/JS，全部本地渲染，不拖慢百度移动端评分
   ------------------------------------------------------------------------- */
:root {
  --ink: #111113;
  --ink-2: #2b2b30;
  --muted: #6b6b73;
  --paper: #fbfaf7;
  --paper-2: #f4f1ea;
  --line: #e3ded3;
  --gold: #a8875a;
  --gold-2: #c8ab7d;
  --ok: #1f6b4f;
  --okbg: #eef5f1;
  --warn: #8a5a12;
  --warnbg: #faf3e6;
  --maxw: 1120px;
  --serif: "Source Han Serif SC", "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.85 var(--sans);
  letter-spacing: .01em;
}

a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--line); }
a:hover { border-bottom-color: var(--gold); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px 88px; }

/* --------------------------- 置顶电话条 --------------------------- */
.phonebar {
  background: var(--ink);
  color: #f6f3ec;
  border-bottom: 1px solid #000;
}
.phonebar .in {
  max-width: var(--maxw); margin: 0 auto; padding: 11px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  font-size: 14px; flex-wrap: wrap;
}
.phonebar strong { font-size: 19px; font-family: var(--serif); letter-spacing: .02em; }
.phonebar a { color: var(--gold-2); border-bottom: 1px solid rgba(200,171,125,.45); }
.phonebar a:hover { color: #fff; border-bottom-color: #fff; }
.phonebar small { color: #b9b4a8; }
.phonebar .ico { display: inline-flex; align-items: center; gap: 8px; }
.phonebar .ico:before {
  content: ""; width: 14px; height: 14px; flex: 0 0 14px; opacity: .8;
  background: currentColor;
  -webkit-mask: var(--m) center/contain no-repeat; mask: var(--m) center/contain no-repeat;
}
.ico-tel { --m: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M6.6 2h3l1.6 4-2.1 1.6a12 12 0 0 0 5.3 5.3L16 10.8l4 1.6v3A2.4 2.4 0 0 1 17.6 18C9.6 17.5 2.5 10.4 2 2.4A2.4 2.4 0 0 1 4.4 0z"/></svg>'); }
.ico-shield { --m: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 1l9 3v7c0 6-4 10-9 12-5-2-9-6-9-12V4z"/></svg>'); }

/* ------------------------------ 站点头部 ------------------------------ */
.site-head { background: var(--paper); border-bottom: 1px solid var(--line); }
.site-head .in {
  max-width: var(--maxw); margin: 0 auto; padding: 22px 24px;
  display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; flex-wrap: wrap;
}
.brandmark { display: flex; align-items: center; gap: 12px; border: 0; }
.brandmark .mk {
  width: 34px; height: 34px; border: 1px solid var(--ink); position: relative; flex: 0 0 34px;
}
.brandmark .mk:before {
  content: ""; position: absolute; left: 7px; right: 7px; top: 9px; height: 1px;
  background: var(--ink);
  box-shadow: 0 5px 0 0 var(--ink), 0 10px 0 0 var(--gold);
}
.brandmark b {
  display: block; font-family: var(--serif); font-size: 21px; font-weight: 600;
  letter-spacing: .12em;
}
.brandmark small { display: block; color: var(--muted); font-size: 12px; letter-spacing: .06em; }
.site-nav { display: flex; gap: 22px; flex-wrap: wrap; }
.site-nav a {
  border: 0; font-size: 14px; color: var(--ink-2); padding-bottom: 3px;
  border-bottom: 1px solid transparent; letter-spacing: .04em;
}
.site-nav a:hover { border-bottom-color: var(--gold); }
.site-nav a.cur { border-bottom-color: var(--ink); font-weight: 600; }

/* ------------------------------- 头条区 ------------------------------- */
.hero {
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: center;
  padding: 64px 0 40px; border-bottom: 1px solid var(--line);
}
.hero .kicker {
  font-size: 12px; letter-spacing: .28em; color: var(--gold); text-transform: uppercase;
  margin: 0 0 18px;
}
h1 {
  font-family: var(--serif); font-weight: 600; line-height: 1.28;
  font-size: clamp(30px, 4.4vw, 46px); letter-spacing: .01em; margin: 0 0 18px;
}
h2 {
  font-family: var(--serif); font-size: clamp(21px, 2.4vw, 27px); font-weight: 600;
  margin: 54px 0 14px; letter-spacing: .02em;
}
h3 { font-family: var(--serif); font-size: 19px; margin: 30px 0 10px; font-weight: 600; }
p { margin: 0 0 16px; }
.meta { color: var(--muted); font-size: 13px; letter-spacing: .04em; }
.crumb { color: var(--muted); font-size: 13px; padding: 22px 0 0; }
.crumb a { border: 0; color: var(--muted); }
.crumb a:hover { color: var(--ink); }

.hero-img { margin: 0; }
.hero-img img {
  width: 100%; height: auto; aspect-ratio: 4/3; object-fit: cover; display: block;
  border: 1px solid var(--line); filter: saturate(.92) contrast(1.02);
}
.hero-img figcaption { color: var(--muted); font-size: 12px; margin-top: 10px; letter-spacing: .04em; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); margin-top: 34px; }
.stat { padding: 22px 18px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat b { display: block; font-family: var(--serif); font-size: 30px; line-height: 1.2; }
.stat span { color: var(--muted); font-size: 12.5px; letter-spacing: .04em; }

/* ------------------------------ 内容组件 ------------------------------ */
.answer {
  background: var(--paper-2); border-left: 2px solid var(--gold);
  padding: 24px 26px; margin: 30px 0;
}
.answer h2 {
  margin: 0 0 8px; font-size: 12px; font-family: var(--sans); font-weight: 700;
  letter-spacing: .24em; color: var(--gold); text-transform: uppercase;
}
.answer p { margin: 0; font-size: 17.5px; line-height: 1.8; }

.card { border: 1px solid var(--line); background: #fff; padding: 26px 28px; margin: 26px 0; }
.notice { background: var(--warnbg); border-left: 2px solid var(--warn); padding: 16px 20px; margin: 22px 0; color: #4a3517; }
.okbox { background: var(--okbg); border-left: 2px solid var(--ok); padding: 16px 20px; margin: 22px 0; color: #17452f; }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(258px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.tile {
  background: #fff; padding: 20px 22px; border: 0; display: block;
  transition: background .18s ease;
}
.tile:hover { background: var(--paper-2); }
.tile b { display: block; font-family: var(--serif); font-size: 17.5px; margin-bottom: 6px; }
.tile span { display: block; color: var(--muted); font-size: 13px; line-height: 1.6; }
.tile small { display: block; margin-top: 10px; font-size: 12px; color: var(--muted); letter-spacing: .04em; }
.tag { display: inline-block; margin-top: 10px; font-size: 11.5px; letter-spacing: .08em; padding: 2px 8px; border: 1px solid var(--line); color: var(--muted); }
.tag.ok { color: var(--ok); border-color: rgba(31,107,79,.35); }
.tag.warn { color: var(--warn); border-color: rgba(138,90,18,.3); }

ol.steps { counter-reset: s; list-style: none; padding: 0; margin: 24px 0; }
ol.steps li {
  counter-increment: s; position: relative; padding: 0 0 20px 52px; border-bottom: 1px solid var(--line);
  margin-bottom: 20px;
}
ol.steps li:last-child { border-bottom: 0; }
ol.steps li:before {
  content: counter(s, decimal-leading-zero); position: absolute; left: 0; top: -2px;
  font-family: var(--serif); font-size: 22px; color: var(--gold);
}

.prose ul { padding-left: 20px; }
.prose li { margin-bottom: 8px; }

.tablewrap { overflow-x: auto; margin: 24px 0; border: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; background: #fff; }
th, td { padding: 13px 16px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--paper-2); font-weight: 600; letter-spacing: .06em; font-size: 13px; }
tbody tr:hover { background: #fcfbf8; }

dl.qa { margin: 22px 0 0; }
dl.qa dt {
  font-family: var(--serif); font-size: 17px; font-weight: 600; margin: 24px 0 8px; padding-left: 26px; position: relative;
}
dl.qa dt:before { content: "Q"; position: absolute; left: 0; color: var(--gold); font-size: 14px; }
dl.qa dd { margin: 0 0 0 26px; color: var(--ink-2); }

.src { font-size: 13.5px; color: var(--muted); }
.src a { color: var(--ink-2); }

.pill {
  display: inline-block; padding: 12px 26px; background: var(--ink); color: #f7f4ee;
  border: 1px solid var(--ink); font-size: 14.5px; letter-spacing: .06em; margin: 6px 10px 6px 0;
}
.pill:hover { background: var(--gold); border-color: var(--gold); color: #fff; }
.pill.ghost { background: transparent; color: var(--ink); }
.pill.ghost:hover { background: var(--ink); color: #f7f4ee; }

.art { padding-top: 8px; }

/* -------------------------------- 页脚 -------------------------------- */
.foot { border-top: 1px solid var(--line); background: var(--paper-2); margin-top: 20px; }
.foot .in { max-width: var(--maxw); margin: 0 auto; padding: 46px 24px 56px; }
.foot .cols { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 34px; }
.foot h4 { font-family: var(--serif); font-size: 14px; letter-spacing: .12em; margin: 0 0 12px; }
.foot ul { list-style: none; padding: 0; margin: 0; font-size: 14px; }
.foot li { margin-bottom: 8px; }
.foot a { border: 0; color: var(--ink-2); }
.foot a:hover { color: var(--gold); }
.foot .fine { margin: 34px 0 0; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12.5px; line-height: 1.8; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 28px; padding-top: 40px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .foot .cols { grid-template-columns: 1fr; gap: 26px; }
}
@media (max-width: 640px) {
  .wrap { padding: 0 18px 64px; }
  .site-head .in { padding: 16px 18px; align-items: flex-start; }
  .site-nav { gap: 16px; overflow-x: auto; width: 100%; padding-bottom: 4px; }
  .phonebar .in { padding: 10px 18px; }
  h2 { margin-top: 40px; }
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #eceae4; --ink-2: #cfcbc2; --muted: #96918a;
    --paper: #121213; --paper-2: #1a1a1c; --line: #2d2d31;
    --okbg: #16241d; --warnbg: #251d10;
  }
  body { background: var(--paper); color: var(--ink); }
  .card, table, .tile { background: #17171a; }
  .tile:hover { background: #1d1d21; }
  th { background: #1a1a1c; }
  tbody tr:hover { background: #1c1c20; }
  .pill { background: var(--gold); border-color: var(--gold); color: #14140f; }
  .pill.ghost { color: var(--ink); }
  .hero-img img { filter: saturate(.85) contrast(1.05) brightness(.92); }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}