:root {
  --ink: #151515;
  --muted: #64615c;
  --paper: #f4f1ea;
  --white: #fffefb;
  --line: #c9c4b9;
  --accent: #ed4b2a;
  --blue: #214f9c;
  --dark: #101010;
  --shell: 1240px;
  --shadow: 0 18px 42px rgba(21, 21, 21, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif; font-size: 16px; line-height: 1.75; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
p { margin: 0 0 1.1rem; }
h1, h2, h3 { margin: 0; color: var(--ink); font-family: "Noto Serif SC", "Songti SC", Georgia, serif; line-height: 1.28; }
h1 { font-size: clamp(2.45rem, 5.4vw, 5.6rem); letter-spacing: -.045em; }
h2 { font-size: clamp(1.75rem, 3.2vw, 3rem); letter-spacing: -.03em; }
h3 { font-size: 1.18rem; }
.shell, .container { width: min(calc(100% - 44px), var(--shell)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 1000; left: 1rem; top: -6rem; padding: .7rem 1rem; background: var(--white); border: 2px solid var(--accent); }
.skip-link:focus { top: 1rem; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

/* 顶部与导航 */
.edition-bar { color: #ddd; background: var(--dark); border-bottom: 1px solid #3c3c3c; font-size: .72rem; letter-spacing: .11em; }
.edition-bar .shell { min-height: 34px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.edition-bar span:first-child { color: #ff6a47; font-weight: 800; }
.site-header { position: sticky; z-index: 100; top: 0; background: rgba(244, 241, 234, .96); border-bottom: 1px solid var(--ink); backdrop-filter: blur(12px); }
.header-inner { width: min(calc(100% - 44px), var(--shell)); min-height: 78px; margin-inline: auto; display: flex; align-items: center; justify-content: space-between; gap: 38px; }
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; color: #fff; background: var(--accent); font: 800 25px/1 Georgia, serif; transform: rotate(-3deg); }
.brand strong, .brand small { display: block; line-height: 1; }
.brand strong { font-family: "Songti SC", serif; font-size: 1.25rem; letter-spacing: .08em; }
.brand small { margin-top: 6px; color: var(--muted); font-size: .6rem; letter-spacing: .17em; }
.site-nav { display: flex; align-items: center; gap: 34px; font-weight: 700; font-size: .92rem; }
.site-nav a { position: relative; padding: 27px 0 24px; }
.site-nav a::before { content: ""; position: absolute; left: 0; right: 100%; bottom: 19px; height: 3px; background: var(--accent); transition: right .2s ease; }
.site-nav a:hover::before, .site-nav a[aria-current="page"]::before { right: 0; }
.nav-toggle { display: none; width: 42px; height: 42px; padding: 8px; border: 1px solid var(--ink); background: transparent; }
.nav-toggle > span:not(.sr-only) { display: block; width: 23px; height: 2px; margin: 5px auto; background: var(--ink); }

/* 首页封面 */
.cover { padding: 46px 0 58px; display: grid; grid-template-columns: minmax(0, 2fr) minmax(300px, .9fr); gap: 34px; border-bottom: 1px solid var(--ink); }
.cover-story { display: grid; grid-template-columns: minmax(300px, 1.08fr) minmax(300px, .92fr); min-width: 0; background: var(--white); border: 1px solid var(--ink); }
.cover-image { min-height: 530px; overflow: hidden; background: #ccc; }
.cover-image img { width: 100%; height: 100%; object-fit: cover; }
.cover-copy { padding: clamp(30px, 4vw, 56px); display: flex; flex-direction: column; justify-content: flex-end; }
.section-code { margin: 0 0 14px; color: var(--accent); font-size: .73rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.cover-copy h1 { font-size: clamp(2.5rem, 4.2vw, 4.7rem); }
.cover-lead { margin: 24px 0; color: #4e4b46; font-size: 1.04rem; }
.arrow-link { display: inline-flex; justify-content: space-between; gap: 25px; align-items: center; width: fit-content; padding-bottom: 3px; color: var(--ink); border-bottom: 2px solid var(--accent); font-weight: 800; }
.cover-brief { padding: 26px; color: #eee; background: var(--dark); }
.brief-heading { padding-bottom: 15px; color: #ff6a47; border-bottom: 1px solid #555; font-size: .78rem; font-weight: 800; letter-spacing: .12em; }
.cover-brief article { display: grid; grid-template-columns: 34px 1fr; gap: 14px; padding: 25px 0; border-bottom: 1px solid #444; }
.cover-brief article > span { color: #ff6a47; font: 700 1.2rem Georgia, serif; }
.cover-brief h2 { color: #fff; font-size: 1.14rem; }
.cover-brief h2 a:hover { color: #ff6a47; }
.cover-brief p { margin: 9px 0 0; color: #aaa; font-size: .88rem; line-height: 1.65; }

/* 首页索引 */
.index-strip { padding: 58px 0; background: var(--blue); color: #fff; }
.index-strip > .shell { display: grid; grid-template-columns: .7fr 2fr; gap: 70px; }
.index-strip h2, .index-strip h3 { color: #fff; }
.index-strip .section-code { color: #ffab96; }
.index-items { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(255,255,255,.35); }
.index-items article { padding: 25px 28px; background: var(--blue); }
.index-items span { color: #b8c9eb; font-size: .76rem; }
.index-items h3 { margin: 8px 0 10px; }
.index-items p { margin: 0; color: #d7e0f1; font-size: .9rem; }

/* 新闻卡片 */
.news-section, .desk-section { padding: 82px 0; }
.section-title, .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 34px; }
.section-title > p, .section-heading > p, .section-heading > div > p:last-child { max-width: 560px; margin: 0; color: var(--muted); }
.news-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.news-card { min-width: 0; background: var(--white); border: 1px solid var(--line); transition: transform .2s ease, box-shadow .2s ease; }
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.card-image { display: block; aspect-ratio: 16/10; overflow: hidden; background: #d9d5cc; }
.card-image img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.88); transition: transform .3s ease, filter .3s ease; }
.news-card:hover img { transform: scale(1.035); filter: saturate(1.05); }
.card-body { padding: 19px; }
.category { display: inline-block; color: var(--accent); font-size: .74rem; font-weight: 800; letter-spacing: .08em; }
.card-body h3 { margin: 7px 0 13px; font-size: 1.08rem; }
.card-body h3 a:hover, .text-link:hover, .related-grid a:hover { color: var(--accent); }
.meta { display: flex; justify-content: space-between; gap: 10px; padding-top: 10px; border-top: 1px solid var(--line); color: var(--muted); font-size: .73rem; }
.card-body > p { margin: 12px 0 0; color: #5e5a54; font-size: .88rem; line-height: 1.65; }
.text-link { display: inline-flex; margin-top: 10px; color: var(--blue); font-size: .85rem; font-weight: 800; }
.all-news, .section-more { display: flex; justify-content: space-between; align-items: center; margin-top: 30px; padding: 16px 20px; border: 1px solid var(--ink); font-weight: 800; }
.all-news:hover, .section-more:hover { color: #fff; background: var(--ink); }

/* 首页方法与栏目 */
.method-section { padding: 82px 0; color: #ddd; background: var(--dark); }
.method-layout { display: grid; grid-template-columns: .85fr 1.4fr; gap: 90px; }
.method-title h2, .method-list h3 { color: #fff; }
.method-title > p:last-child { margin-top: 24px; color: #aaa; }
.method-list { border-top: 1px solid #555; }
.method-list article { display: grid; grid-template-columns: 58px 1fr; gap: 22px; padding: 25px 0; border-bottom: 1px solid #444; }
.method-list article > span { color: #ff6a47; font: 700 1.35rem Georgia, serif; }
.method-list p { margin: 8px 0 0; color: #aaa; }
.desk-grid { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--ink); }
.desk-grid article { min-width: 0; padding: 28px; border-right: 1px solid var(--ink); }
.desk-grid article:last-child { border-right: 0; }
.desk-grid span { color: var(--accent); font-size: .74rem; font-weight: 800; }
.desk-grid h3 { margin: 9px 0 14px; }
.desk-grid p { min-height: 84px; color: var(--muted); font-size: .91rem; }
.desk-grid a { color: var(--blue); font-weight: 800; font-size: .86rem; }
.standards { padding: 72px 0; background: #dfdbd1; border-top: 1px solid var(--ink); }
.standards-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 90px; }
.standards-layout > div:last-child { max-width: 760px; }

/* 通用栏目 */
.section { padding: 78px 0; }
.alt { background: #e8e4db; }
.page-intro { padding: 65px 0 58px; background: var(--white); border-bottom: 1px solid var(--ink); }
.page-intro .container { position: relative; padding-left: 28px; border-left: 8px solid var(--accent); }
.page-intro h1 { max-width: 950px; }
.page-intro .lead { max-width: 790px; margin: 22px 0 0; color: var(--muted); font-size: 1.08rem; }
.page-intro.compact { padding-bottom: 48px; }
.eyebrow { margin: 0 0 12px; color: var(--accent); font-size: .72rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.lead { color: var(--muted); font-size: 1.08rem; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 30px; color: var(--muted); font-size: .8rem; }
.breadcrumb a:hover { color: var(--accent); }
.split { display: grid; grid-template-columns: .72fr 1.28fr; gap: 90px; align-items: start; }
.split > div:last-child { color: #56524d; font-size: 1.03rem; }
.band { padding: 78px 0; color: #dfe8f7; background: var(--blue); }
.band h2, .band h3, .section-heading.light h2 { color: #fff; }
.band .eyebrow { color: #ffb09d; }
.section-heading.light > p { color: #cad6ec; }
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(255,255,255,.35); }
.topic-grid article { padding: 30px; background: var(--blue); }
.topic-grid span { color: #ffb09d; font: 700 1.55rem Georgia, serif; }
.topic-grid h3 { margin: 20px 0 10px; }
.topic-grid p { margin: 0; color: #d4def0; }
.info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.info-grid article { padding: 28px; background: var(--white); border: 1px solid var(--line); border-top: 5px solid var(--accent); }
.info-grid h3 { margin-bottom: 10px; }
.info-grid p { margin: 0; color: var(--muted); }
.prose-wide { max-width: 880px; color: #514e49; }
.prose-wide h3 { margin: 28px 0 10px; }
.prose-wide a, .legal a { color: var(--blue); text-decoration: underline; }
.prose-wide li, .legal li { margin: .45rem 0; }
.result-count { color: var(--muted); font-size: .86rem; }
.list-note { margin-top: 9px !important; }
.status-panel { display: flex; align-items: center; justify-content: space-between; gap: 35px; padding: 36px; color: #ddd; background: var(--dark); border-left: 8px solid var(--accent); }
.status-panel h2 { margin: 6px 0 12px; color: #fff; }
.status-panel p { max-width: 760px; margin: 0; color: #aaa; }
.status-label { color: #ff8267; font-size: .75rem; font-weight: 800; letter-spacing: .13em; }
.primary-link, .secondary-link { display: inline-flex; align-items: center; justify-content: center; min-height: 47px; padding: 0 20px; font-weight: 800; }
.primary-link { color: #fff; background: var(--accent); }
.secondary-link { border: 1px solid currentColor; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.steps li { display: flex; gap: 17px; padding: 26px; background: var(--white); border: 1px solid var(--line); }
.steps li > span { flex: none; width: 36px; height: 36px; display: grid; place-items: center; color: #fff; background: var(--accent); font-weight: 800; }
.steps h3 { margin: 3px 0 8px; }
.steps p { margin: 0; color: var(--muted); }
.faq { border-top: 1px solid var(--ink); }
.faq details { padding: 18px 0; border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 800; }
.faq p { max-width: 850px; margin: 10px 0 0; color: var(--muted); }
.contact-card { padding: 32px; display: grid; grid-template-columns: .7fr 1.3fr; gap: 45px; background: var(--white); border: 1px solid var(--line); }
.contact-card span, .contact-card a, .contact-card strong { display: block; }
.contact-card span { color: var(--muted); font-size: .78rem; }
.contact-card a, .contact-card strong { color: var(--blue); font-size: 1.06rem; }
.contact-card p { margin: 0; color: var(--muted); }
.legal { max-width: 900px; }
.legal h2 { margin: 38px 0 13px; font-size: 1.55rem; }
.legal h2:first-child { margin-top: 0; }
.legal p, .legal li { color: #514e49; }

/* 文章详情 */
.article-header { padding: 55px 0 32px; }
.article-header h1 { max-width: 1000px; margin: 13px 0; font-size: clamp(2.2rem, 4.5vw, 4.2rem); }
.article-deck { max-width: 800px; color: var(--muted); font-size: 1.08rem; }
.article-meta { display: flex; gap: 24px; color: var(--muted); font-size: .82rem; }
.article-figure { margin-top: 10px; }
.article-figure img { width: 100%; max-height: 650px; object-fit: cover; border: 1px solid var(--ink); }
.article-figure figcaption { padding: 8px 0; color: var(--muted); font-size: .74rem; }
.article-layout { padding-top: 46px; padding-bottom: 78px; display: grid; grid-template-columns: minmax(0, 780px) 260px; justify-content: space-between; gap: 70px; }
.article-content { font-family: "Noto Serif SC", "Songti SC", serif; font-size: 1.06rem; line-height: 2; }
.article-content .opening { padding: 20px 22px; background: var(--white); border-left: 6px solid var(--accent); font-size: 1.14rem; }
.article-content section { margin-top: 40px; }
.article-content h2 { margin-bottom: 14px; font-size: 1.62rem; }
.article-note { margin-top: 42px; padding: 26px; background: #e5e1d8; border-top: 4px solid var(--blue); }
.article-note h2 { font-size: 1.3rem; }
.article-note p { margin: 0; }
.article-side { position: sticky; top: 105px; align-self: start; padding: 22px; color: #ddd; background: var(--dark); }
.side-label { color: #fff; font-weight: 800; }
.article-side dl { margin: 14px 0 18px; }
.article-side dl div { display: flex; justify-content: space-between; padding: 9px 0; border-top: 1px solid #444; }
.article-side dt { color: #999; }
.article-side dd { margin: 0; }
.article-side a { color: #ff8267; font-weight: 800; }
.related { padding: 68px 0; background: #ded9cf; border-top: 1px solid var(--ink); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.related-grid article { padding: 25px; background: var(--white); border-top: 5px solid var(--accent); }
.related-grid span, .related-grid time { color: var(--muted); font-size: .76rem; }
.related-grid h3 { margin: 8px 0 13px; }

/* 页脚 */
.site-footer { padding: 55px 0 32px; color: #aaa; background: var(--dark); border-top: 7px solid var(--accent); }
.footer-grid { width: min(calc(100% - 44px), var(--shell)); margin-inline: auto; display: grid; grid-template-columns: 1.7fr 1fr 1fr; gap: 65px; }
.footer-grid > div > a:not(.footer-brand) { display: block; margin: 7px 0; }
.footer-grid > div > a:hover { color: #fff; }
.footer-brand { display: block; margin-bottom: 13px; color: #fff; font: 700 1.55rem "Songti SC", serif; }
.footer-grid p { max-width: 440px; }
.footer-heading { margin-bottom: 13px; color: #fff; font-weight: 800; }
.copyright { margin-top: 20px; font-size: .8rem; }

@media (max-width: 1040px) {
  .site-nav { gap: 18px; font-size: .86rem; }
  .cover { grid-template-columns: 1fr; }
  .cover-story { grid-template-columns: 1fr 1fr; }
  .cover-brief { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .brief-heading { grid-column: 1 / -1; }
  .cover-brief article { border-bottom: 0; }
  .news-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .desk-grid { grid-template-columns: repeat(2, 1fr); }
  .desk-grid article:nth-child(2) { border-right: 0; }
  .desk-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--ink); }
  .article-layout { grid-template-columns: minmax(0, 1fr) 230px; gap: 40px; }
}

@media (max-width: 760px) {
  .shell, .container, .header-inner, .footer-grid { width: min(calc(100% - 28px), var(--shell)); }
  .edition-bar .shell { justify-content: space-between; }
  .edition-bar span:nth-child(2) { display: none; }
  .header-inner { min-height: 68px; }
  .nav-toggle { display: block; }
  .site-header #site-navigation { display: none; position: absolute; top: 68px; left: 0; right: 0; background: var(--paper); border-bottom: 1px solid var(--ink); box-shadow: var(--shadow); }
  .site-header #site-navigation.is-open { display: block; }
  .site-nav { display: block; padding: 10px 20px; }
  .site-nav a { display: block; padding: 11px 3px; }
  .site-nav a::before { display: none; }
  .cover { padding: 24px 0 40px; }
  .cover-story { grid-template-columns: 1fr; }
  .cover-image { min-height: 310px; }
  .cover-copy { padding: 27px 22px; }
  .cover-brief { display: block; }
  .cover-brief article { border-bottom: 1px solid #444; }
  .index-strip > .shell, .method-layout, .standards-layout, .split { grid-template-columns: 1fr; gap: 28px; }
  .index-items, .news-grid, .topic-grid, .info-grid, .steps, .related-grid { grid-template-columns: 1fr; }
  .index-items { gap: 0; background: transparent; }
  .index-items article { border-top: 1px solid rgba(255,255,255,.3); }
  .news-section, .desk-section, .method-section, .standards, .section, .band { padding: 58px 0; }
  .section-title, .section-heading { display: block; }
  .section-title > p, .section-heading > p { margin-top: 12px; }
  .desk-grid { grid-template-columns: 1fr; }
  .desk-grid article { border-right: 0; border-bottom: 1px solid var(--ink); }
  .desk-grid article:last-child { border-bottom: 0; }
  .desk-grid p { min-height: 0; }
  .page-intro { padding: 48px 0; }
  .page-intro .container { padding-left: 18px; border-left-width: 5px; }
  .status-panel { display: block; padding: 27px; }
  .status-panel .primary-link { margin-top: 20px; }
  .contact-card { grid-template-columns: 1fr; gap: 18px; }
  .article-header { padding-top: 36px; }
  .article-meta { display: block; }
  .article-layout { grid-template-columns: 1fr; padding-top: 28px; }
  .article-side { position: static; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}