/* 城市高质量发展央企协同专班 · 全站样式
   布局：顶部深蓝"晨光"横幅 + 白底内容区，章节用宋体标题与金色刻度线分隔；手机单列，桌面两到三列。
   字体全部使用系统中文字体，不依赖境外字体服务，国内访问更快更稳。 */

:root {
  --paper: #f4f6f9;
  --surface: #ffffff;
  --ink: #13263d;
  --ink-2: #4b5d73;
  --ink-3: #74859a;
  --line: #d9e1ea;
  --brand: #14467a;
  --brand-2: #2f7fc6;
  --gold: #e9a12f;
  --gold-ink: #8d5b00;
  --band: #0f3a66;
  --band-2: #1a5a96;
  --band-fg: #ffffff;
  --band-fg-2: #c9dbef;
  --tint: #eaf1f9;

  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  --wrap: 1120px;
  --gutter: clamp(16px, 4vw, 32px);
  --radius: 6px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0c1622; --surface: #132131; --ink: #e5ecf4; --ink-2: #a3b3c5; --ink-3: #7d8fa4;
    --line: #243649; --brand: #8fc0f0; --brand-2: #5ea6e8; --gold: #f2b24a; --gold-ink: #f2b24a;
    --band: #0a2a4b; --band-2: #12416f; --band-fg: #ffffff; --band-fg-2: #b6cbe2; --tint: #172a3f;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0c1622; --surface: #132131; --ink: #e5ecf4; --ink-2: #a3b3c5; --ink-3: #7d8fa4;
  --line: #243649; --brand: #8fc0f0; --brand-2: #5ea6e8; --gold: #f2b24a; --gold-ink: #f2b24a;
  --band: #0a2a4b; --band-2: #12416f; --band-fg: #ffffff; --band-fg-2: #b6cbe2; --tint: #172a3f;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font: 16px/1.75 var(--sans); letter-spacing: .01em;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--brand-2); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 700; line-height: 1.3; text-wrap: balance; margin: 0; }
p { margin: 0; }
.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 16px; z-index: 99; background: var(--surface); padding: 8px 12px; }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 20;
  background: var(--band); color: var(--band-fg);
  border-bottom: 3px solid var(--gold);
}
.topbar .wrap { display: flex; align-items: center; gap: 16px; min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; min-width: 0; }
.brand img { width: 36px; height: 36px; border-radius: 4px; flex: none; }
.brand-name { font-family: var(--serif); font-weight: 700; font-size: 16px; line-height: 1.25; }
.brand-name small { display: block; font-family: var(--sans); font-weight: 400; font-size: 12px; color: var(--band-fg-2); letter-spacing: .04em; }
.prov-chip {
  display: inline-block; margin-left: 6px; padding: 0 7px; border-radius: 3px;
  background: var(--gold); color: #3a2600; font: 600 12px/20px var(--sans); vertical-align: 2px;
}
.nav { margin-left: auto; display: flex; gap: 2px; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a { color: var(--band-fg-2); text-decoration: none; font-size: 14px; padding: 6px 10px; border-radius: 4px; white-space: nowrap; }
.nav a:hover { color: var(--band-fg); background: rgba(255,255,255,.08); }
@media (max-width: 860px) {
  .topbar .wrap { flex-wrap: wrap; gap: 0; padding-block: 8px 0; }
  .nav { margin-left: calc(var(--gutter) * -1); margin-right: calc(var(--gutter) * -1); padding-inline: calc(var(--gutter) - 10px); width: calc(100% + var(--gutter) * 2); padding-block: 4px 6px; }
}

/* ---------- 横幅 ---------- */
.hero {
  background: linear-gradient(180deg, var(--band) 0%, var(--band-2) 100%);
  color: var(--band-fg); position: relative; overflow: hidden;
}
.hero::before { /* 晨光：取自专班标识的同心圆 */
  content: ""; position: absolute; right: -120px; top: -160px; width: 520px; height: 520px; border-radius: 50%;
  background: radial-gradient(circle, rgba(242,178,74,.55) 0 22%, rgba(242,178,74,.18) 22% 40%, rgba(242,178,74,.08) 40% 58%, transparent 58%);
  pointer-events: none;
}
.hero .wrap { position: relative; display: grid; grid-template-columns: 1.1fr .9fr; gap: clamp(24px, 5vw, 56px); align-items: center; padding-block: clamp(36px, 7vw, 72px); }
.hero-text { min-width: 0; display: grid; gap: 18px; }
.eyebrow { font-size: 13px; letter-spacing: .12em; color: var(--gold); font-weight: 600; }
.hero h1 { font-size: clamp(28px, 4.6vw, 46px); }
.hero h1 .org { display: block; font-size: .5em; font-family: var(--sans); font-weight: 500; color: var(--band-fg-2); margin-bottom: 10px; letter-spacing: .04em; }
.lede { color: var(--band-fg-2); font-size: clamp(15px, 1.6vw, 17px); max-width: 34em; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 4px; }
.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 10px 18px; border-radius: 4px;
  font: 600 15px/1.2 var(--sans); text-decoration: none; border: 1px solid transparent;
}
.btn-gold { background: var(--gold); color: #2e1f00; }
.btn-gold:hover { filter: brightness(1.06); }
.btn-ghost { color: var(--band-fg); border-color: rgba(255,255,255,.4); }
.btn-ghost:hover { background: rgba(255,255,255,.08); }
.hero-photo { margin: 0; min-width: 0; }
.hero-photo img { border-radius: var(--radius); box-shadow: 0 18px 40px rgba(0,0,0,.28); aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.hero-photo figcaption { font-size: 13px; color: var(--band-fg-2); margin-top: 10px; }
/* 首页：专班标志 */
.hero-emblem::before { display: none; }
.emblem { margin: 0; min-width: 0; justify-self: center; width: min(100%, 440px); position: relative; }
.emblem::before { /* 柔光衬底，让圆形标志从深蓝底上浮出来 */
  content: ""; position: absolute; inset: -8%; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,.22) 0 55%, rgba(255,255,255,0) 72%);
}
.emblem img { position: relative; width: 100%; border-radius: 50%; box-shadow: 0 0 0 6px rgba(255,255,255,.9), 0 22px 50px rgba(0,0,0,.32); }
@media (max-width: 760px) { .emblem { width: min(78%, 340px); } }
@media (max-width: 760px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero::before { width: 360px; height: 360px; right: -140px; top: -140px; }
}

/* 服务链条：真实的先后顺序 */
.chain { background: var(--surface); border-bottom: 1px solid var(--line); }
.chain ol { list-style: none; margin: 0; padding: 18px 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; counter-reset: c; }
.chain li { counter-increment: c; position: relative; text-align: center; padding: 10px 6px; background: var(--tint); border-radius: 4px; font-weight: 600; color: var(--brand); font-size: 15px; }
.chain li::before { content: counter(c); display: block; font: 600 11px/1 var(--sans); color: var(--gold-ink); letter-spacing: .1em; margin-bottom: 4px; }
.chain li:not(:last-child)::after {
  content: ""; position: absolute; right: -8px; top: 50%; width: 8px; height: 2px; background: var(--gold); z-index: 1;
}
.chain .label { font-size: 13px; color: var(--ink-3); padding-top: 14px; }
@media (max-width: 560px) { .chain li { font-size: 13px; padding: 8px 2px; } }

/* ---------- 章节 ---------- */
.section { padding-block: clamp(44px, 7vw, 80px); }
.section + .section { border-top: 1px solid var(--line); }
.section.alt { background: var(--surface); }
.sec-head { display: grid; gap: 10px; margin-bottom: clamp(24px, 4vw, 40px); max-width: 44em; }
.sec-no { font: 600 13px/1 var(--sans); color: var(--gold-ink); letter-spacing: .14em; display: flex; align-items: center; gap: 10px; }
.sec-no::after { content: ""; width: 40px; height: 2px; background: var(--gold); }
.sec-head h2 { font-size: clamp(24px, 3.2vw, 32px); color: var(--ink); }
.sec-head p { color: var(--ink-2); }
.prose { display: grid; gap: 14px; max-width: 42em; color: var(--ink-2); }
.prose strong { color: var(--ink); }

.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(24px, 4vw, 48px); align-items: start; }
.two-col > * { min-width: 0; }
@media (max-width: 760px) { .two-col { grid-template-columns: 1fr; } }

/* 专班一览 */
.facts { display: grid; grid-template-columns: max-content 1fr; gap: 0; margin: 0; border-top: 1px solid var(--line); }
.facts dt, .facts dd { padding: 11px 0; border-bottom: 1px solid var(--line); margin: 0; }
.facts dt { color: var(--ink-3); font-size: 14px; padding-right: 20px; white-space: nowrap; }
.facts dd { color: var(--ink); min-width: 0; }
@media (max-width: 420px) {
  .facts { grid-template-columns: 1fr; }
  .facts dt { border-bottom: 0; padding-bottom: 0; }
  .facts dd { padding-top: 2px; }
}

.five { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; margin-top: 8px; }
.five div { background: var(--surface); padding: 14px 12px; font-size: 14px; color: var(--ink-2); }
.five b { display: block; font-family: var(--serif); color: var(--brand); font-size: 16px; margin-bottom: 2px; }
@media (max-width: 640px) { .five { grid-template-columns: 1fr 1fr; } .five div:last-child { grid-column: 1 / -1; } }
.motto { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 4px; }
.motto span { font-family: var(--serif); font-weight: 700; color: var(--brand); background: var(--tint); padding: 6px 14px; border-radius: 3px; }

/* 四层架构：自上而下的层级 */
.layers { display: grid; gap: 10px; }
.layer { display: grid; grid-template-columns: 150px 1fr; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.section.alt .layer { background: var(--paper); }
.layer-tag { background: var(--band-2); color: #fff; padding: 18px 16px; display: grid; align-content: center; gap: 2px; }
.layer-tag .lv { font-size: 12px; letter-spacing: .1em; opacity: .8; }
.layer-tag .nm { font-family: var(--serif); font-size: 19px; font-weight: 700; }
.layer-tag .vb { font-size: 13px; color: var(--gold); font-weight: 600; }
.layer-body { padding: 16px 20px; display: grid; gap: 8px; min-width: 0; }
.layer-body h3 { font-size: 17px; }
.layer-body p { color: var(--ink-2); font-size: 15px; }
.layer-split { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.layer-split > div { background: var(--tint); border-radius: 4px; padding: 10px 12px; font-size: 14px; color: var(--ink-2); min-width: 0; }
.layer-split b { display: block; color: var(--ink); font-size: 15px; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tags span { font-size: 13px; padding: 2px 10px; border: 1px solid var(--line); border-radius: 20px; color: var(--ink-2); }
.layer-tag.l1 { background: var(--band); }
.layer-tag.l4 { background: #3d6f9c; }
@media (max-width: 640px) {
  .layer { grid-template-columns: 1fr; }
  .layer-tag { grid-template-columns: auto auto 1fr; align-items: baseline; gap: 10px; padding: 12px 16px; }
  .layer-tag .vb { justify-self: end; }
  .layer-split { grid-template-columns: 1fr; }
}

/* 六项职能 */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.grid-3 > * { min-width: 0; }
@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .grid-3 { grid-template-columns: 1fr; } }
.fn { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; display: grid; gap: 8px; align-content: start; }
.fn .code { font: 600 12px/1 var(--sans); color: var(--gold-ink); letter-spacing: .12em; }
.fn h3 { font-size: 19px; color: var(--brand); }
.fn p { font-size: 14.5px; color: var(--ink-2); }

/* 五步法：有序步骤 */
.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; counter-reset: s; max-width: 46em; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 56px 1fr; gap: 16px; position: relative; padding-bottom: 22px; }
.steps li::before {
  content: counter(s); width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center;
  background: var(--band-2); color: #fff; font: 700 18px/1 var(--serif); border: 3px solid var(--paper); box-shadow: 0 0 0 1px var(--band-2);
}
.steps li:not(:last-child)::after { content: ""; position: absolute; left: 21px; top: 46px; bottom: 0; width: 2px; background: var(--line); }
.steps h3 { font-size: 19px; padding-top: 8px; }
.steps p { color: var(--ink-2); font-size: 15px; }
.steps > li > div { min-width: 0; }
.section.alt .steps li::before { border-color: var(--surface); }

/* 承诺 */
.pledges { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.pledges > * { min-width: 0; }
@media (max-width: 640px) { .pledges { grid-template-columns: 1fr; } }
.pledge { border-top: 3px solid var(--brand-2); background: var(--surface); padding: 18px 20px; display: grid; gap: 8px; align-content: start; }
.pledge h3 { font-size: 18px; }
.pledge p { font-size: 14.5px; color: var(--ink-2); }
.priority { margin-top: 24px; background: var(--tint); border-radius: var(--radius); padding: 20px; display: grid; gap: 14px; }
.priority h3 { font-size: 16px; font-family: var(--sans); color: var(--ink); }
.priority ol { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; counter-reset: p; }
.priority li { counter-increment: p; background: var(--surface); border-radius: 4px; padding: 12px 14px; font-size: 14.5px; color: var(--ink-2); min-width: 0; }
.priority li::before { content: "第" counter(p) "序位"; display: block; font-size: 12px; color: var(--gold-ink); font-weight: 600; letter-spacing: .06em; }
.priority li b { color: var(--ink); }
.priority .note { font-size: 14px; color: var(--ink-2); }
@media (max-width: 640px) { .priority ol { grid-template-columns: 1fr; } }

/* 成员 */
.team-group + .team-group { margin-top: 32px; }
.team-group > h3 { font-size: 18px; margin-bottom: 4px; }
.team-group > .hint { font-size: 14px; color: var(--ink-3); margin-bottom: 14px; }
.people { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.person { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; display: grid; gap: 4px; align-content: start; }
.section.alt .person { background: var(--paper); }
.person .nm { font-family: var(--serif); font-size: 18px; font-weight: 700; }
.person .rl { font-size: 13px; color: var(--brand-2); font-weight: 600; }
.person .ds { font-size: 14px; color: var(--ink-2); }
.person.lead { grid-column: span 2; border-left: 3px solid var(--gold); }
@media (max-width: 560px) { .person.lead { grid-column: auto; } }
.fineprint { font-size: 14px; color: var(--ink-3); margin-top: 20px; max-width: 46em; }

/* 合作窗口 */
.who { display: grid; gap: 14px; }
.who div { display: grid; gap: 4px; padding-left: 14px; border-left: 2px solid var(--gold); }
.who b { font-family: var(--serif); font-size: 17px; }
.who p { color: var(--ink-2); font-size: 15px; }
.contact-card { background: var(--band); color: var(--band-fg); border-radius: var(--radius); padding: 24px; display: grid; gap: 16px; }
.contact-card h3 { font-size: 20px; }
.contact-card dl { margin: 0; display: grid; gap: 12px; }
.contact-card dt { font-size: 12px; color: var(--band-fg-2); letter-spacing: .08em; }
.contact-card dd { margin: 0; font-size: 17px; word-break: break-all; }
.contact-card dd a { color: var(--band-fg); text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.35); }
.contact-card .tel { font-size: 24px; font-variant-numeric: tabular-nums; letter-spacing: .02em; }

/* ---------- 总站：省级专班 ---------- */
.prov-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.prov { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; display: grid; grid-template-rows: auto 1fr; color: inherit; text-decoration: none; }
a.prov:hover { border-color: var(--brand-2); box-shadow: 0 6px 18px rgba(20,70,122,.12); }
.prov img { aspect-ratio: 16 / 9; object-fit: cover; width: 100%; }
.prov-body { padding: 18px 20px; display: grid; gap: 8px; align-content: start; }
.prov-body h3 { font-size: 20px; }
.status { font-size: 12px; font-weight: 600; padding: 1px 8px; border-radius: 3px; justify-self: start; }
.status.on { background: #e3f3e8; color: #1d6b37; }
.status.soon { background: var(--tint); color: var(--ink-2); }
:root[data-theme="dark"] .status.on { background: #173d27; color: #8fdcaa; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .status.on { background: #173d27; color: #8fdcaa; } }
.prov-body p { font-size: 14.5px; color: var(--ink-2); }
.prov-body .go { color: var(--brand-2); font-weight: 600; font-size: 15px; margin-top: 4px; }
.prov.placeholder { border-style: dashed; background: transparent; grid-template-rows: 1fr; }
.prov.placeholder .prov-body { align-content: center; min-height: 200px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--band); color: var(--band-fg-2); font-size: 14px; }
.footer .wrap { padding-block: 32px; display: grid; gap: 8px; }
.footer b { color: var(--band-fg); font-family: var(--serif); font-size: 16px; }
.footer a { color: var(--band-fg-2); }
.footer .legal { margin-top: 10px; padding-top: 14px; border-top: 1px solid rgba(255,255,255,.14); font-size: 13px; display: flex; flex-wrap: wrap; gap: 6px 18px; }