/* ============================================================
   锡山广电中心 · 官网样式表
   设计风格：雅宋美术馆（米白底 / 墨色 / 朱砂红 / 宋体标题）
   字体策略：系统字体栈优先，离线可用，部署后无需外网依赖
   ============================================================ */

:root {
  /* 色板 */
  --bg: #F7F5F0;            /* 米白 页面底 */
  --bg-card: #FBF9F4;       /* 卡片底 */
  --bg-deep: #1A1A1A;       /* 墨 深底 */
  --ink: #1A1A1A;           /* 主文字 */
  --ink-2: #4A4A45;         /* 次级文字 */
  --ink-3: #6B675E;         /* 弱化文字 */
  --line: #D8D4C8;          /* 细线 */
  --accent: #B23A3A;        /* 朱砂红 */
  --accent-deep: #8F2E2E;   /* 深朱砂 */
  --accent-soft: #F3E3DE;   /* 朱砂浅底 */

  /* 字体 */
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC",
           "Source Han Serif CN", "SimSun", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC",
          "Source Han Sans SC", "Source Han Sans CN", "Helvetica Neue",
          Arial, sans-serif;

  /* 布局 */
  --container: 1120px;
  --radius: 4px;
  --transition: 0.25s ease;
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; font-size: 1rem; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* 顶部品牌红线 */
.top-line { height: 4px; background: var(--accent); }

.container { width: min(var(--container), 92%); margin-inline: auto; }

/* 视觉隐藏（仅读屏） */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(247, 245, 240, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}

.brand { display: flex; align-items: center; gap: 14px; }

.brand-mark {
  width: 40px; height: 40px; flex: none;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent); color: #F7F5F0;
  font-family: var(--serif); font-size: 20px; letter-spacing: 0;
  border-radius: 3px;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-name {
  font-family: var(--serif); font-size: 20px; font-weight: 700;
  letter-spacing: 3px; color: var(--ink);
}
.brand-sub { font-size: 11px; letter-spacing: 2px; color: var(--ink-3); }

.main-nav { display: flex; align-items: center; gap: 6px; }

.main-nav a {
  display: block; padding: 8px 14px;
  font-size: 15px; letter-spacing: 1px; color: var(--ink-2);
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.main-nav a:hover { color: var(--accent); }
.main-nav a.active { color: var(--accent); border-bottom-color: var(--accent); }

.nav-toggle {
  display: none; width: 42px; height: 42px; border: 1px solid var(--line);
  background: transparent; border-radius: 4px; align-items: center;
  justify-content: center; flex-direction: column; gap: 5px;
}
.nav-toggle span {
  display: block; width: 20px; height: 2px; background: var(--ink);
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 通用区块 ---------- */
.section { padding: 84px 0; }
.section-alt { background: #FBF9F4; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-head { margin-bottom: 48px; }
.section-kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 13px; letter-spacing: 4px; color: var(--accent);
  margin-bottom: 12px;
}
.section-kicker::before {
  content: ""; width: 22px; height: 1px; background: var(--accent);
}
.section-title {
  font-family: var(--serif); font-size: clamp(1.75rem, 3.4vw, 2.4rem);
  font-weight: 700; letter-spacing: 3px; color: var(--ink); line-height: 1.35;
}
.section-desc { margin-top: 12px; font-size: 15px; color: var(--ink-3); max-width: 640px; }

.text-center .section-kicker::before { display: none; }
.text-center .section-kicker::after {
  content: ""; width: 22px; height: 1px; background: var(--accent);
}
.text-center { text-align: center; }
.text-center .section-desc { margin-inline: auto; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 34px; border: 1px solid transparent;
  font-size: 15px; letter-spacing: 3px; line-height: 1;
  border-radius: var(--radius); transition: all var(--transition);
}
.btn-primary { background: var(--accent); color: #F7F5F0; }
.btn-primary:hover { background: var(--accent-deep); }
.btn-outline { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-outline:hover { background: var(--ink); color: var(--bg); }
.btn-light { border-color: #F7F5F0; color: #F7F5F0; }
.btn-light:hover { background: #F7F5F0; color: var(--ink); }

/* ---------- Hero 首屏 ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: 96px 0 108px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 12% 20%, rgba(178, 58, 58, 0.06) 0, transparent 32%),
    radial-gradient(circle at 88% 78%, rgba(26, 26, 26, 0.05) 0, transparent 30%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid; grid-template-columns: 1.15fr 0.85fr;
  align-items: center; gap: 48px;
}
.hero-kicker {
  font-size: 14px; letter-spacing: 6px; color: var(--accent);
  margin-bottom: 20px;
}
.hero-title {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 5.4vw, 4rem);
  font-weight: 700; letter-spacing: 6px; line-height: 1.3;
  color: var(--ink); margin-bottom: 26px;
}
.hero-title em { font-style: normal; color: var(--accent); }
.hero-desc { font-size: 16px; color: var(--ink-3); letter-spacing: 1px; margin-bottom: 40px; max-width: 480px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-art { position: relative; display: flex; justify-content: center; }
.hero-vertical {
  position: absolute; right: -6px; top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-family: var(--serif); font-size: 18px;
  letter-spacing: 10px; color: var(--line);
  user-select: none; pointer-events: none;
}

/* 首页数据/亮点条 */
.stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
  margin-top: 84px;
}
.stat { background: var(--bg); padding: 30px 24px; text-align: center; }
.stat-num {
  font-family: var(--serif); font-size: 30px; font-weight: 700;
  color: var(--accent); letter-spacing: 2px;
}
.stat-label { margin-top: 6px; font-size: 14px; letter-spacing: 3px; color: var(--ink-2); }

/* ---------- 卡片网格（细线分隔） ---------- */
.card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.card { background: var(--bg-card); padding: 34px 28px; transition: background var(--transition); }
.card:hover { background: #F4EFE4; }
.card-icon {
  width: 52px; height: 52px; display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft); color: var(--accent);
  border-radius: 3px; margin-bottom: 22px; font-size: 22px;
}
.card-title { font-family: var(--serif); font-size: 22px; font-weight: 700; letter-spacing: 2px; margin-bottom: 12px; }
.card-text { font-size: 14px; color: var(--ink-3); line-height: 1.9; }
.card-link { display: inline-block; margin-top: 18px; font-size: 14px; letter-spacing: 2px; color: var(--accent); }
.card-link::after { content: " →"; transition: margin-left var(--transition); }
.card-link:hover::after { margin-left: 6px; }

/* ---------- 概况预览（图文并排） ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.split-figure {
  background: var(--bg-deep); color: #E9E4D8;
  padding: 40px; border-radius: var(--radius);
  display: flex; flex-direction: column; gap: 18px; min-height: 340px;
  justify-content: space-between;
}
.split-figure .quote {
  font-family: var(--serif); font-size: 20px; letter-spacing: 3px; line-height: 1.9;
}
.split-figure .quote-mark { font-family: var(--serif); font-size: 64px; color: var(--accent); line-height: 0.6; }
.split-list { display: flex; flex-direction: column; }
.split-list li {
  display: flex; gap: 16px; padding: 16px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px; color: var(--ink-2);
}
.split-list li:first-child { padding-top: 0; }
.split-list .num {
  font-family: var(--serif); color: var(--accent);
  font-weight: 700; letter-spacing: 1px; flex: none;
}
.split-list b { font-weight: 600; color: var(--ink); margin-right: 8px; }

/* ---------- 新闻列表 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.news-item { display: flex; flex-direction: column; gap: 14px; }
.news-date {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; letter-spacing: 2px; color: var(--ink-3);
}
.news-date::after { content: ""; width: 26px; height: 1px; background: var(--line); }
.news-title {
  font-family: var(--serif); font-size: 19px; font-weight: 700;
  letter-spacing: 1px; line-height: 1.6; color: var(--ink);
  transition: color var(--transition);
}
.news-item:hover .news-title { color: var(--accent); }
.news-excerpt { font-size: 14px; color: var(--ink-3); line-height: 1.9; }
.news-more { font-size: 14px; letter-spacing: 2px; color: var(--accent); }

/* 新闻列表页 */
.news-list { display: flex; flex-direction: column; }
.news-row {
  display: grid; grid-template-columns: 150px 1fr auto;
  gap: 28px; align-items: baseline;
  padding: 26px 0; border-bottom: 1px solid var(--line);
  transition: background var(--transition);
}
.news-row:hover { background: #F4EFE4; }
.news-row .date { font-size: 14px; letter-spacing: 2px; color: var(--ink-3); font-family: var(--serif); }
.news-row .title { font-family: var(--serif); font-size: 19px; font-weight: 700; letter-spacing: 1px; }
.news-row:hover .title { color: var(--accent); }
.news-row .tag {
  font-size: 12px; letter-spacing: 2px; color: var(--accent);
  border: 1px solid var(--accent); padding: 3px 12px; border-radius: 99px;
}

/* ---------- 网点 ---------- */
.outlet-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.outlet-card {
  background: var(--bg-card); border: 1px solid var(--line);
  padding: 30px 28px; border-radius: var(--radius);
  border-top: 3px solid var(--accent);
}
.outlet-card h3 { font-family: var(--serif); font-size: 20px; font-weight: 700; letter-spacing: 2px; margin-bottom: 14px; }
.outlet-card dl { display: flex; flex-direction: column; gap: 8px; font-size: 14px; color: var(--ink-2); }
.outlet-card dt { color: var(--ink-3); font-size: 12px; letter-spacing: 2px; margin-top: 6px; }
.outlet-card dd { color: var(--ink); }

/* ---------- 联系 / 表单 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact-item { padding: 18px 0; border-bottom: 1px solid var(--line); }
.contact-item:first-child { padding-top: 0; }
.contact-item .label { font-size: 12px; letter-spacing: 3px; color: var(--accent); margin-bottom: 6px; }
.contact-item .value { font-size: 18px; letter-spacing: 1px; color: var(--ink); }
.contact-item .value small { font-size: 13px; color: var(--ink-3); letter-spacing: 1px; }

.form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form label { font-size: 14px; letter-spacing: 2px; color: var(--ink-2); display: block; margin-bottom: 8px; }
.form input, .form textarea, .form select {
  width: 100%; padding: 12px 16px;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-card); color: var(--ink);
  transition: border-color var(--transition);
}
.form input:focus, .form textarea:focus, .form select:focus {
  outline: none; border-color: var(--accent);
}
.form textarea { min-height: 130px; resize: vertical; }
.form-tip { font-size: 12px; color: var(--ink-3); letter-spacing: 1px; }

/* ---------- 内页 Hero ---------- */
.page-hero {
  padding: 72px 0; background: var(--bg);
  border-bottom: 1px solid var(--line);
  position: relative; overflow: hidden;
}
.page-hero::after {
  content: ""; position: absolute; right: -40px; top: -40px;
  width: 220px; height: 220px; border: 1px solid var(--line); border-radius: 50%;
}
.page-hero .crumbs { font-size: 13px; letter-spacing: 2px; color: var(--ink-3); margin-bottom: 14px; }
.page-hero .crumbs a:hover { color: var(--accent); }
.page-hero h1 {
  font-family: var(--serif); font-size: clamp(2rem, 4.4vw, 3rem);
  font-weight: 700; letter-spacing: 6px; line-height: 1.3;
}
.page-hero .lead { margin-top: 14px; font-size: 15px; color: var(--ink-3); max-width: 620px; }

/* ---------- 时间线（发展历程） ---------- */
.timeline { position: relative; padding-left: 34px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px;
  width: 1px; background: var(--line);
}
.timeline li { position: relative; padding: 0 0 34px 20px; }
.timeline li::before {
  content: ""; position: absolute; left: -30px; top: 9px;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--accent);
}
.timeline .year { font-family: var(--serif); font-size: 20px; font-weight: 700; color: var(--accent); letter-spacing: 1px; }
.timeline .event { margin-top: 4px; font-size: 15px; color: var(--ink-2); line-height: 1.9; }

/* ---------- 荣誉/徽章 ---------- */
.badge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.badge {
  background: var(--bg-card); border: 1px solid var(--line);
  padding: 26px 22px; text-align: center; border-radius: var(--radius);
  transition: border-color var(--transition), transform var(--transition);
}
.badge:hover { border-color: var(--accent); transform: translateY(-3px); }
.badge .badge-icon { font-size: 30px; color: var(--accent); margin-bottom: 12px; }
.badge h4 { font-family: var(--serif); font-size: 17px; font-weight: 700; letter-spacing: 1px; margin-bottom: 6px; }
.badge p { font-size: 13px; color: var(--ink-3); }

/* ---------- 文章页 ---------- */
.article { max-width: 780px; margin-inline: auto; }
.article h1 {
  font-family: var(--serif); font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  font-weight: 700; letter-spacing: 2px; line-height: 1.5; margin-bottom: 16px;
}
.article .meta {
  display: flex; gap: 22px; font-size: 13px; color: var(--ink-3);
  letter-spacing: 1px; padding-bottom: 22px; border-bottom: 1px solid var(--line);
  margin-bottom: 34px;
}
.article .body { font-size: 16px; line-height: 2.1; color: var(--ink-2); }
.article .body h2 { font-family: var(--serif); font-size: 22px; letter-spacing: 1px; margin: 36px 0 14px; color: var(--ink); }
.article .body p { margin-bottom: 18px; }
.article .body figure { margin: 26px 0; }
.article .body .photo {
  height: 260px; background: var(--line); border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-3); font-size: 14px; letter-spacing: 3px;
}
.article .body figcaption { margin-top: 10px; font-size: 12px; color: var(--ink-3); letter-spacing: 1px; text-align: center; }
.article-nav {
  margin-top: 48px; padding-top: 22px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; font-size: 14px; letter-spacing: 1px;
}
.article-nav a { color: var(--accent); }

/* 示例内容提示 */
.notice {
  border: 1px dashed var(--accent); background: var(--accent-soft);
  color: var(--accent-deep); font-size: 13px; letter-spacing: 1px;
  padding: 12px 18px; border-radius: var(--radius);
}

/* ---------- 页脚 ---------- */
.site-footer { background: var(--bg-deep); color: #B9B4A8; margin-top: 0; }
.footer-main {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px;
  padding: 64px 0 44px;
}
.footer-brand .brand-name { color: #F4F0E6; }
.footer-brand .brand-sub { color: #8F8A7E; }
.footer-brand p { margin-top: 18px; font-size: 13px; line-height: 2; color: #A5A096; }
.footer-col h4 {
  font-family: var(--serif); color: #F4F0E6; font-size: 16px;
  font-weight: 700; letter-spacing: 3px; margin-bottom: 20px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a { font-size: 14px; color: #A5A096; transition: color var(--transition); }
.footer-col a:hover { color: #E8C9A0; }
.footer-bottom {
  border-top: 1px solid rgba(216, 212, 200, 0.14);
  padding: 20px 0; font-size: 13px; letter-spacing: 1px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  color: #7E7A70;
}
.footer-bottom a:hover { color: #E8C9A0; }

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 46px; height: 46px; border-radius: 3px;
  background: var(--ink); color: var(--bg);
  border: none; font-size: 18px; opacity: 0; visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition), background var(--transition);
}
.to-top.show { opacity: 1; visibility: visible; }
.to-top:hover { background: var(--accent); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 36px; }
  .hero-art { order: -1; }
  .split, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .outlet-grid { grid-template-columns: 1fr; }
  .badge-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 767px) {
  .section { padding: 60px 0; }

  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    max-height: 0; overflow: hidden; transition: max-height 0.35s ease;
  }
  .main-nav.open { max-height: 380px; }
  .main-nav a { padding: 16px 24px; border-bottom: 1px solid var(--line); border-left: 3px solid transparent; }
  .main-nav a.active { border-left-color: var(--accent); }

  .hero { padding: 60px 0 72px; }
  .stats { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .news-row { grid-template-columns: 1fr; gap: 8px; padding: 22px 0; }
  .badge-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-main { grid-template-columns: 1fr; gap: 36px; padding: 48px 0 36px; }
  .hero-vertical { display: none; }
}