/* ==========================================================================
   南方集团官网 · 样式表
   纯静态站点，无外部依赖；字体使用系统内置中文字体，保证大陆访问速度。
   ========================================================================== */

:root {
  --ink: #14171c;
  --ink-2: #3d4550;
  --ink-3: #6b7480;
  --line: #e5e2dc;
  --line-soft: #efece7;
  --paper: #ffffff;
  --paper-2: #faf8f5;
  --paper-3: #f2efe9;

  --red: #b8232d;
  --red-dark: #8f1a22;
  --red-light: #d9534f;
  --red-soft: #fdf2f2;

  --navy: #16243a;
  --navy-2: #1f3450;
  --navy-3: #35507a;

  --radius: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 2px rgba(20, 23, 28, .05), 0 2px 8px rgba(20, 23, 28, .04);
  --shadow: 0 2px 6px rgba(20, 23, 28, .06), 0 12px 32px rgba(20, 23, 28, .08);
  --shadow-lg: 0 20px 60px rgba(20, 23, 28, .16);

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

  --header-h: 68px;
  --wrap: 1120px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-2);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--red); text-decoration: none; }
a:hover { color: var(--red-dark); }

h1, h2, h3, h4 { color: var(--ink); line-height: 1.4; margin: 0; font-weight: 700; }

p { margin: 0 0 1em; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 860px; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--red); color: #fff; padding: 10px 16px; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; color: #fff; }

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line-soft);
}
.header-inner {
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 12px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand img { width: 40px; height: 40px; object-fit: contain; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-name { font-size: 17px; font-weight: 700; letter-spacing: .06em; }
.brand-sub { font-size: 10px; letter-spacing: .22em; color: var(--ink-3); font-family: var(--serif); }

.site-nav ul { display: flex; align-items: center; gap: 4px; list-style: none; margin: 0; padding: 0; }
.site-nav a {
  display: block; padding: 8px 14px; border-radius: 8px;
  color: var(--ink-2); font-size: 15px; white-space: nowrap;
}
.site-nav a:hover { background: var(--paper-3); color: var(--ink); }
.site-nav a.is-active { color: var(--red); font-weight: 700; background: var(--red-soft); }
.site-nav a.nav-cta {
  background: var(--red); color: #fff; font-weight: 700; margin-left: 8px;
}
.site-nav a.nav-cta:hover { background: var(--red-dark); color: #fff; }
.site-nav a.nav-cta.is-active { background: var(--red-dark); color: #fff; }

.nav-toggle {
  display: none; width: 44px; height: 44px; border: 1px solid var(--line);
  background: #fff; border-radius: 10px; cursor: pointer; padding: 11px 10px;
}
.nav-toggle span { display: block; height: 2px; background: var(--ink); border-radius: 2px; transition: .2s; }
.nav-toggle span + span { margin-top: 5px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 通用小节 ---------- */
.section { padding: 76px 0; }
.section-alt { background: var(--paper-2); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.section-dark { background: var(--navy); color: #c9d3e2; }
.section-dark h2, .section-dark h3 { color: #fff; }

.eyebrow {
  font-size: 12px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--red); font-weight: 700; margin: 0 0 10px; font-family: var(--serif);
}
.section-dark .eyebrow { color: var(--red-light); }
h2.section-title { font-size: clamp(24px, 3vw, 32px); letter-spacing: .02em; }
.section-lead { font-size: 17px; color: var(--ink-3); max-width: 760px; margin: 16px 0 0; }
.section-dark .section-lead { color: #a9b8cd; }
.section-head { margin-bottom: 44px; }
.section-head.center { text-align: center; }
.section-head.center .section-lead { margin-left: auto; margin-right: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 10px; font-size: 15.5px; font-weight: 700;
  border: 1px solid transparent; cursor: pointer; transition: transform .15s, background .2s, box-shadow .2s;
}
.btn-primary { background: var(--red); color: #fff; box-shadow: 0 8px 20px rgba(184, 35, 45, .22); }
.btn-primary:hover { background: var(--red-dark); color: #fff; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { background: var(--paper-3); color: var(--ink); }
.btn-on-dark { background: rgba(255, 255, 255, .1); color: #fff; border-color: rgba(255, 255, 255, .3); }
.btn-on-dark:hover { background: rgba(255, 255, 255, .18); color: #fff; }
.btn-row { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative; overflow: hidden; color: #e8eefa;
  background:
    radial-gradient(900px 520px at 12% 0%, rgba(184, 35, 45, .32), transparent 62%),
    radial-gradient(760px 520px at 92% 18%, rgba(53, 80, 122, .55), transparent 66%),
    linear-gradient(160deg, #0d1726 0%, #16243a 48%, #1c2f4b 100%);
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 52px 52px, 52px 52px;
  mask-image: radial-gradient(70% 70% at 50% 40%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(70% 70% at 50% 40%, #000 40%, transparent 100%);
  pointer-events: none;
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.35fr .65fr; gap: 48px; align-items: center;
  padding: 84px 0 72px;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px; font-size: 13px;
  background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .18);
  color: #d8e2f2; margin-bottom: 22px;
}
.hero-tag .dot { width: 7px; height: 7px; border-radius: 50%; background: #57c98a; box-shadow: 0 0 0 4px rgba(87, 201, 138, .18); }
.hero h1 {
  color: #fff; font-size: clamp(34px, 5.2vw, 54px); line-height: 1.2; letter-spacing: .02em;
}
.hero h1 .en { display: block; font-family: var(--serif); font-size: .42em; letter-spacing: .3em; color: var(--red-light); font-weight: 400; margin-top: 14px; text-transform: uppercase; }
.hero-desc { font-size: 17px; color: #b9c7dc; max-width: 620px; margin: 22px 0 30px; }
.hero-actions { margin-bottom: 6px; }
.hero-note { font-size: 13.5px; color: #8ea1bb; margin: 18px 0 0; }
.hero-emblem { position: relative; }
.hero-emblem img {
  border-radius: 18px; box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255, 255, 255, .14);
}
.hero-emblem .server-badge {
  position: absolute; left: -18px; bottom: -18px; display: flex; align-items: center; gap: 10px;
  background: #fff; color: var(--ink); border-radius: 999px; padding: 8px 18px 8px 8px;
  box-shadow: var(--shadow); font-size: 13.5px; font-weight: 700;
}
.hero-emblem .server-badge img { width: 34px; height: 34px; border-radius: 50%; border: none; box-shadow: none; }

/* 数据条 */
.stats { background: var(--paper); border-bottom: 1px solid var(--line-soft); }
.stats-inner {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
}
.stat { padding: 30px 26px; border-left: 1px solid var(--line-soft); }
.stat:first-child { border-left: none; }
.stat-k { font-size: 12px; letter-spacing: .18em; color: var(--ink-3); text-transform: uppercase; margin-bottom: 4px; }
.stat-v { font-size: 21px; font-weight: 700; color: var(--ink); line-height: 1.4; }
.stat-v small { display: block; font-size: 13px; font-weight: 400; color: var(--ink-3); letter-spacing: .02em; }

/* ---------- 卡片 ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--paper); border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow-sm); transition: transform .18s, box-shadow .2s, border-color .2s;
  position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--line); }
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p:last-child { margin-bottom: 0; }
.card .card-tag {
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .1em;
  color: var(--red); background: var(--red-soft); border-radius: 6px; padding: 3px 10px; margin-bottom: 12px;
}
.card-leader { font-size: 14px; color: var(--ink-3); margin: 12px 0 0; padding-top: 12px; border-top: 1px dashed var(--line); }
.card-leader b { color: var(--ink); }
.card-accent::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--red);
}

.value-card { text-align: left; }
.value-card .value-icon {
  width: 44px; height: 44px; border-radius: 12px; background: var(--navy); color: #fff;
  display: flex; align-items: center; justify-content: center; font-family: var(--serif); font-size: 19px;
  margin-bottom: 16px;
}
.value-card h3 { font-size: 18px; }
.value-card p { color: var(--ink-3); font-size: 15px; }

/* ---------- 工业设施标签 ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 26px; }
.chip {
  font-size: 13.5px; color: #dce5f2; background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .14); border-radius: 999px; padding: 6px 14px;
}
.chips-light .chip { color: var(--ink-2); background: var(--paper-3); border-color: var(--line); }

/* ---------- 实景图 ---------- */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.shot { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); background: var(--paper-3); }
.shot img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform .5s ease; }
.shot:hover img { transform: scale(1.045); }
.shot figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 26px 16px 12px;
  background: linear-gradient(transparent, rgba(9, 15, 26, .82)); color: #fff; font-size: 14px;
}
.shot-wide { grid-column: span 2; }
.shot-wide img { aspect-ratio: 32 / 15; }

/* ---------- 公告列表 ---------- */
.doc-list { display: grid; gap: 14px; margin: 0; padding: 0; list-style: none; }
.doc-item {
  display: flex; align-items: center; gap: 18px; padding: 20px 24px;
  background: var(--paper); border: 1px solid var(--line-soft); border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm); transition: border-color .2s, transform .18s;
}
.doc-item:hover { border-color: var(--red); transform: translateX(4px); }
.doc-no {
  flex: 0 0 auto; font-family: var(--serif); font-size: 12.5px; letter-spacing: .1em;
  color: var(--red); border: 1px solid var(--red); border-radius: 6px; padding: 4px 10px; background: var(--red-soft);
}
.doc-no.is-plain { color: var(--ink-3); border-color: var(--line); background: var(--paper-2); }
.doc-main { flex: 1 1 auto; min-width: 0; }
.doc-title { font-size: 16.5px; font-weight: 700; color: var(--ink); margin: 0; }
.doc-meta { font-size: 13px; color: var(--ink-3); margin: 4px 0 0; }
.doc-badge {
  flex: 0 0 auto; font-size: 12.5px; border-radius: 999px; padding: 4px 12px;
  background: var(--paper-3); color: var(--ink-2); white-space: nowrap;
}

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line-soft); border-radius: var(--radius-sm); background: #fff; }
table { border-collapse: collapse; width: 100%; min-width: 520px; font-size: 15px; }
th, td { padding: 13px 18px; text-align: left; border-bottom: 1px solid var(--line-soft); }
th { background: var(--paper-2); color: var(--ink); font-size: 14px; letter-spacing: .04em; }
tr:last-child td { border-bottom: none; }
td code, p code, li code {
  font-family: Consolas, "Courier New", monospace; font-size: .92em;
  background: var(--paper-3); border: 1px solid var(--line-soft); border-radius: 5px; padding: 1px 6px; color: var(--navy-2);
}

/* ---------- 入会步骤 ---------- */
.steps { counter-reset: step; list-style: none; margin: 0; padding: 0; display: grid; gap: 18px; }
.steps li {
  position: relative; counter-increment: step; padding: 22px 26px 22px 76px;
  background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius-sm); box-shadow: var(--shadow-sm);
}
.steps li::before {
  content: counter(step); position: absolute; left: 22px; top: 22px;
  width: 36px; height: 36px; border-radius: 50%; background: var(--red); color: #fff;
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-family: var(--serif);
}
.steps h3 { font-size: 17px; margin-bottom: 6px; }
.steps p { margin: 0; color: var(--ink-3); font-size: 15px; }

/* ---------- 章程 ---------- */
.charter-layout { display: grid; grid-template-columns: 232px 1fr; gap: 44px; align-items: start; }
.charter-toc { position: sticky; top: calc(var(--header-h) + 20px); font-size: 14.5px; }
.charter-toc .toc-title { font-size: 12px; letter-spacing: .18em; color: var(--ink-3); text-transform: uppercase; margin-bottom: 12px; }
.charter-toc ol { list-style: none; margin: 0; padding: 0; border-left: 2px solid var(--line); }
.charter-toc a { display: block; padding: 7px 0 7px 14px; color: var(--ink-2); margin-left: -2px; border-left: 2px solid transparent; }
.charter-toc a:hover { color: var(--red); border-left-color: var(--red); }
.charter-body { max-width: 780px; }
.chapter { margin-bottom: 44px; scroll-margin-top: calc(var(--header-h) + 20px); }
.chapter > h2 {
  font-size: 22px; padding-bottom: 12px; border-bottom: 2px solid var(--ink); margin-bottom: 20px;
}
.chapter h3 { font-size: 17px; color: var(--red-dark); margin: 26px 0 12px; }
.article { margin: 0 0 14px; line-height: 1.95; }
.article b { color: var(--ink); font-weight: 700; }
.article-num { color: var(--red); font-weight: 700; }

/* ---------- 温馨提示 / 注意 ---------- */
.notice {
  border-left: 4px solid var(--red); background: var(--red-soft);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0; padding: 18px 22px; margin: 24px 0;
  font-size: 15px; color: var(--ink-2);
}
.notice b { color: var(--red-dark); }
.notice-info { border-left-color: var(--navy-3); background: #f2f6fc; }
.notice-info b { color: var(--navy-2); }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 12px; }
.faq details {
  background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius-sm);
  padding: 4px 22px; box-shadow: var(--shadow-sm);
}
.faq summary {
  cursor: pointer; padding: 16px 0; font-weight: 700; color: var(--ink); font-size: 16px;
  list-style: none; display: flex; justify-content: space-between; gap: 16px; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "＋"; color: var(--red); font-weight: 400; flex: 0 0 auto; }
.faq details[open] summary::after { content: "－"; }
.faq details > p { margin: 0 0 16px; color: var(--ink-2); }

/* ---------- 页头 banner ---------- */
.page-hero {
  background: linear-gradient(160deg, #0f1c2e 0%, #16243a 55%, #1e3050 100%);
  color: #dbe4f1; padding: 62px 0 54px; position: relative; overflow: hidden;
}
.page-hero::after {
  content: ""; position: absolute; right: -80px; top: -60px; width: 380px; height: 380px;
  border-radius: 50%; background: radial-gradient(circle, rgba(184, 35, 45, .35), transparent 68%);
}
.page-hero .eyebrow { color: var(--red-light); }
.page-hero h1 { color: #fff; font-size: clamp(28px, 4vw, 40px); position: relative; }
.page-hero p { color: #a9b8cd; max-width: 720px; margin: 14px 0 0; position: relative; }
.crumb { font-size: 13px; color: #8ea1bb; margin-bottom: 14px; position: relative; }
.crumb a { color: #b9c7dc; }
.crumb a:hover { color: #fff; }

/* ---------- 两栏内容 ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.split-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.fact-list { list-style: none; margin: 22px 0 0; padding: 0; display: grid; gap: 12px; }
.fact-list li { position: relative; padding-left: 22px; font-size: 15.5px; color: var(--ink-2); }
.fact-list li::before {
  content: ""; position: absolute; left: 0; top: 10px; width: 8px; height: 8px;
  border-radius: 2px; background: var(--red); transform: rotate(45deg);
}

/* ---------- 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.contact-card { background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow-sm); }
.contact-card h3 { font-size: 18px; margin-bottom: 6px; }
.contact-card .k { font-size: 13px; color: var(--ink-3); letter-spacing: .1em; text-transform: uppercase; }
.contact-card .big { font-size: 26px; font-weight: 700; color: var(--navy); font-family: var(--serif); letter-spacing: .04em; margin: 6px 0 10px; }
.link-out { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; }
.link-out::after { content: "↗"; font-size: .9em; }

/* ---------- CTA 条 ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--red-dark), var(--red) 55%, #d0453c);
  color: #fff; padding: 56px 0;
}
.cta-band h2 { color: #fff; font-size: clamp(22px, 3vw, 30px); }
.cta-band p { color: rgba(255, 255, 255, .88); margin: 12px 0 26px; max-width: 720px; }
.cta-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 28px; }
.cta-band .btn-light { background: #fff; color: var(--red-dark); }
.cta-band .btn-light:hover { background: #fdf2f2; color: var(--red-dark); }

/* ---------- 页脚 ---------- */
.site-footer { background: #0e1725; color: #93a3ba; padding: 58px 0 26px; font-size: 14.5px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 34px; border-bottom: 1px solid rgba(255, 255, 255, .1); }
.footer-brand { display: flex; gap: 16px; align-items: flex-start; }
.footer-brand img { width: 52px; height: 52px; }
.footer-brand strong { color: #fff; font-size: 16px; display: block; letter-spacing: .06em; }
.footer-brand p { margin: 8px 0 0; color: #8b9cb4; max-width: 380px; }
.footer-col h4 { color: #fff; font-size: 14px; letter-spacing: .14em; margin-bottom: 14px; text-transform: uppercase; }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.footer-col a { color: #a7b6cb; }
.footer-col a:hover { color: #fff; }
.footer-bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px;
  padding-top: 22px; font-size: 13px; color: #7d8ea6;
}
.footer-note { font-size: 12.5px; color: #6d7e96; margin-top: 10px; grid-column: 1 / -1; }
.footer-seal { width: 76px; opacity: .92; }

/* ---------- 大事记时间轴 ---------- */
.timeline { list-style: none; margin: 0; padding: 0 0 0 30px; border-left: 2px solid var(--line); }
.timeline li { position: relative; padding: 0 0 30px 26px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: -39px; top: 7px; width: 14px; height: 14px;
  border-radius: 50%; background: #fff; border: 3px solid var(--red);
}
.timeline li.is-milestone::before { background: var(--red); box-shadow: 0 0 0 4px var(--red-soft); }
.timeline time {
  display: block; font-family: var(--serif); font-size: 13.5px; letter-spacing: .08em;
  color: var(--red); margin-bottom: 2px;
}
.timeline h3 { font-size: 17px; margin-bottom: 4px; }
.timeline p { margin: 0 0 6px; color: var(--ink-3); font-size: 15px; }
.timeline .tl-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.timeline .tl-tags span {
  font-size: 12px; color: var(--ink-2); background: var(--paper-3);
  border: 1px solid var(--line-soft); border-radius: 999px; padding: 2px 10px;
}
.section-dark .timeline { border-left-color: rgba(255, 255, 255, .18); }
.section-dark .timeline li::before { background: var(--navy); border-color: var(--red-light); }
.section-dark .timeline li.is-milestone::before { background: var(--red-light); }
.section-dark .timeline p { color: #a9b8cd; }
.section-dark .timeline .tl-tags span { color: #c9d3e2; background: rgba(255, 255, 255, .08); border-color: rgba(255, 255, 255, .14); }

/* 两栏时间轴 */
.timeline-2col { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 46px; }
.timeline-2col .timeline { border-left: none; padding-left: 0; }
.timeline-2col .timeline li { padding-left: 26px; }
.timeline-2col .timeline li::before { left: -7px; }
.timeline-2col > .timeline:first-child { position: relative; }
.timeline-2col::before { content: none; }

/* ---------- 二维码卡 ---------- */
.qr-card { text-align: center; }
.qr-card img.qr {
  width: 190px; height: 190px; margin: 0 auto 14px; border-radius: 12px;
  border: 1px solid var(--line); background: #fff; padding: 8px;
}
/* 官方二维码原图为腾讯文档卡片截图（含抬头与说明），需按原比例展示 */
.qr-card img.qr-official {
  width: auto; height: auto; max-width: 100%; max-height: 200px; padding: 0;
}
.qr-card .qr-hint { font-size: 13.5px; color: var(--ink-3); margin: 0; }
.qr-row { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; margin-top: 18px; }

/* ---------- 视频占位 / 礼包 ---------- */
.video-slot {
  position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  background: linear-gradient(150deg, #16243a, #24395c); color: #cdd9ea;
  min-height: 300px; display: flex; align-items: center; justify-content: center; text-align: center; padding: 32px;
}
.video-slot .play {
  width: 62px; height: 62px; border-radius: 50%; background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .3); display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px; font-size: 22px; color: #fff;
}
.video-slot p { margin: 0; max-width: 420px; font-size: 14.5px; }
.gift-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.gift {
  background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-sm);
}
.gift .gift-icon {
  width: 46px; height: 46px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  background: var(--red-soft); color: var(--red); font-size: 20px; margin-bottom: 14px;
}
.gift h3 { font-size: 17px; margin-bottom: 8px; }
.gift p { margin: 0; color: var(--ink-3); font-size: 15px; }

/* ---------- 视频卡（B 站宣传片） ---------- */
.video-card {
  display: flex; gap: 20px; align-items: flex-start;
  background: #fff; border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-sm); transition: transform .18s, box-shadow .2s, border-color .2s;
  color: var(--ink-2);
}
.video-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--red); color: var(--ink-2); }
.video-thumb {
  flex: 0 0 auto; width: 118px; height: 76px; border-radius: 10px;
  background: linear-gradient(150deg, var(--navy), var(--navy-3));
  display: flex; align-items: center; justify-content: center;
}
.video-thumb .play {
  width: 38px; height: 38px; border-radius: 50%; background: rgba(255, 255, 255, .16);
  border: 1px solid rgba(255, 255, 255, .38); color: #fff; font-size: 15px;
  display: flex; align-items: center; justify-content: center; padding-left: 3px;
}
.video-body { display: block; }
.video-body h3 { font-size: 17.5px; margin-bottom: 8px; }
.video-body p { color: var(--ink-3); font-size: 15px; margin: 0 0 10px; }
.video-go { display: inline-block; font-size: 14px; font-weight: 700; color: var(--red); }
@media (max-width: 480px) {
  .video-card { flex-direction: column; }
  .video-thumb { width: 100%; height: 120px; }
}

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; padding: 58px 0 54px; gap: 40px; }
  .hero-emblem { max-width: 320px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .stat { border-left: none; border-top: 1px solid var(--line-soft); }
  .stat:nth-child(1), .stat:nth-child(2) { border-top: none; }
  .stat:nth-child(even) { border-left: 1px solid var(--line-soft); }
  .charter-layout { grid-template-columns: 1fr; gap: 28px; }
  .charter-toc { position: static; }
  .charter-toc ol { columns: 2; }
  .split { grid-template-columns: 1fr; gap: 30px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 15.5px; }
  .wrap { padding: 0 18px; }
  .section { padding: 54px 0; }
  .grid-2, .grid-3, .grid-4, .contact-grid { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr; }
  .shot-wide { grid-column: span 1; }
  .nav-toggle { display: block; }
  .site-nav {
    position: absolute; left: 0; right: 0; top: 100%;
    background: #fff; border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow); display: none; padding: 10px 14px 18px;
  }
  .site-nav.is-open { display: block; }
  .site-nav ul { flex-direction: column; align-items: stretch; gap: 2px; }
  .site-nav a { padding: 12px 14px; font-size: 16px; }
  .site-nav a.nav-cta { margin-left: 0; text-align: center; margin-top: 6px; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .charter-toc ol { columns: 1; }
  .doc-item { flex-wrap: wrap; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

@media print {
  .site-header, .site-nav, .nav-toggle, .cta-band, .site-footer { display: none !important; }
  body { color: #000; }
  .card, .doc-item, .table-wrap { box-shadow: none; }
}