/* ============================================================
   广州蓝天救援协会 - 官网改版 2026
   设计语言：简约大气 / 品牌蓝 #1E7FC2 / 深海军蓝 #0B2540
   ============================================================ */
:root {
  --blue: #1e7fc2;
  --blue-dark: #14618f;
  --blue-deep: #0b2540;
  --blue-light: #eaf4fb;
  --sky: #2f8dc7;
  --orange: #ff8c42;
  --text: #2c3a47;
  --text-light: #6b7a88;
  --line: #e3ebf2;
  --bg-soft: #f5f9fc;
  --white: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 40px rgba(11, 37, 64, 0.08);
  --shadow-hover: 0 18px 50px rgba(11, 37, 64, 0.14);
  --header-h: 84px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color 0.25s; }
ul, ol { list-style: none; }
.container { width: 1180px; max-width: 92%; margin: 0 auto; }

/* ---------- 顶部条 ---------- */
.topbar {
  background: var(--blue-deep);
  color: rgba(255, 255, 255, 0.85);
  font-size: 13px;
  height: 38px;
  display: flex;
  align-items: center;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; }
.topbar .hotline b { color: #ffb37a; font-size: 15px; letter-spacing: 0.5px; }
.topbar .links a { margin-left: 18px; color: rgba(255, 255, 255, 0.75); }
.topbar .links a:hover { color: #fff; }

/* ---------- 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: box-shadow 0.3s, border-color 0.3s;
}
.site-header.scrolled { box-shadow: 0 6px 24px rgba(11, 37, 64, 0.1); border-color: var(--line); }
.header-inner { height: var(--header-h); display: flex; align-items: center; justify-content: space-between; }
.logo img { height: 58px; width: auto; }
.main-nav > ul { display: flex; align-items: center; gap: 6px; }
.main-nav a.nav-link {
  display: block;
  padding: 10px 20px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  position: relative;
}
.main-nav a.nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 3px;
  border-radius: 3px;
  background: var(--blue);
  transform: translateX(-50%);
  transition: width 0.28s;
}
.main-nav a.nav-link:hover { color: var(--blue); }
.main-nav a.nav-link:hover::after { width: 26px; }
.main-nav li.active a.nav-link { color: var(--blue); }
.main-nav li.active a.nav-link::after { width: 26px; }
/* 论坛入口：强调按钮样式 */
.main-nav a.nav-bbs {
  color: #fff;
  background: var(--blue);
  padding: 9px 20px;
  margin-left: 8px;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(30, 127, 194, 0.28);
  transition: background 0.25s, box-shadow 0.25s, transform 0.25s;
}
.main-nav a.nav-bbs::after { display: none; }
.main-nav a.nav-bbs:hover {
  color: #fff;
  background: #1668a3;
  box-shadow: 0 6px 16px rgba(30, 127, 194, 0.36);
  transform: translateY(-1px);
}

/* 移动端汉堡 */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 26px; height: 3px; background: var(--blue-deep); margin: 5px 0; border-radius: 2px; transition: 0.3s; }

/* ---------- 首页 Hero ---------- */
.hero {
  position: relative;
  height: 620px;
  background: url("../images/banner.webp") center / cover no-repeat;
  display: flex;
  align-items: center;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11, 37, 64, 0.62) 0%, rgba(11, 37, 64, 0.25) 55%, rgba(11, 37, 64, 0) 100%);
}
.hero-content { position: relative; z-index: 2; color: #fff; max-width: 640px; }
.hero-tag {
  display: inline-block;
  border: 1px solid rgba(255, 255, 255, 0.55);
  padding: 6px 18px;
  border-radius: 100px;
  font-size: 14px;
  letter-spacing: 4px;
  margin-bottom: 26px;
  background: rgba(255, 255, 255, 0.08);
}
.hero h1 { font-size: 54px; line-height: 1.25; letter-spacing: 6px; font-weight: 700; text-shadow: 0 4px 24px rgba(0, 0, 0, 0.3); }
.hero h1 em { font-style: normal; color: #9fd4ff; }
.hero p.sub { margin-top: 18px; font-size: 18px; letter-spacing: 2px; color: rgba(255, 255, 255, 0.92); }
.hero-actions { margin-top: 38px; display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 34px;
  border-radius: 100px;
  font-size: 16px;
  font-weight: 500;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--orange); color: #fff; box-shadow: 0 8px 24px rgba(255, 140, 66, 0.4); }
.btn-primary:hover { background: #ff7a26; box-shadow: 0 12px 30px rgba(255, 140, 66, 0.5); }
.btn-ghost { border: 1.5px solid rgba(255, 255, 255, 0.75); color: #fff; }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.14); }

/* ---------- 数据带 ---------- */
.stats-band { background: var(--blue-deep); color: #fff; padding: 44px 0; }
.stats-band .container { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat .num { font-size: 42px; font-weight: 700; font-family: Georgia, serif; color: #7cc4f5; }
.stat .num sup { font-size: 20px; color: var(--orange); margin-left: 2px; }
.stat .label { margin-top: 4px; font-size: 15px; color: rgba(255, 255, 255, 0.78); letter-spacing: 2px; }

/* ---------- 通用 Section ---------- */
.section { padding: 92px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head .cn {
  font-size: 34px;
  font-weight: 700;
  color: var(--blue-deep);
  letter-spacing: 4px;
}
.section-head .en {
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: #9db4c6;
}
.section-head .bar { width: 46px; height: 4px; border-radius: 4px; background: var(--blue); margin: 18px auto 0; }
.section-head.left { text-align: left; }
.section-head.left .bar { margin-left: 0; }

/* ---------- 关于摘要（图文两栏） ---------- */
.about-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; }
.about-grid .pic { position: relative; }
.about-grid .pic img { border-radius: var(--radius); box-shadow: var(--shadow); }
.about-grid .pic::before {
  content: "";
  position: absolute;
  left: -22px;
  bottom: -22px;
  width: 62%;
  height: 62%;
  border-radius: var(--radius);
  background: var(--blue-light);
  z-index: -1;
}
.about-text h3 { font-size: 26px; color: var(--blue-deep); margin-bottom: 20px; letter-spacing: 2px; }
.about-text p { color: var(--text-light); margin-bottom: 16px; text-align: justify; }
.about-point { display: flex; gap: 14px; margin-top: 26px; flex-wrap: wrap; }
.about-point span {
  background: var(--blue-light);
  color: var(--blue-dark);
  padding: 8px 20px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
}

/* ---------- 五大队伍 ---------- */
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
/* 四卡片（部门职能）用 2×2 排布，更均衡 */
.team-grid.cols-2 { grid-template-columns: repeat(2, 1fr); max-width: 940px; margin: 0 auto; }
.team-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
}
.team-card::after {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--blue), #6fb9e8);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s;
}
.team-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-hover); border-color: transparent; }
.team-card:hover::after { transform: scaleX(1); }
.team-card .icon {
  width: 64px; height: 64px;
  border-radius: 18px;
  background: var(--blue-light);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}
.team-card .icon svg { width: 34px; height: 34px; stroke: var(--blue); }
.team-card h4 { font-size: 20px; color: var(--blue-deep); margin-bottom: 10px; letter-spacing: 1px; }
.team-card h4 small { font-size: 12px; color: #9db4c6; font-weight: 400; margin-left: 8px; letter-spacing: 1px; }
.team-card p { font-size: 14.5px; color: var(--text-light); }

/* ---------- 历程（首页简版） ---------- */
.mile-strip { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.mile {
  background: #fff;
  border-radius: var(--radius);
  padding: 30px 24px;
  border: 1px solid var(--line);
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}
.mile:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.mile .year { font-size: 26px; font-weight: 700; color: var(--blue); font-family: Georgia, serif; }
.mile .evt { margin-top: 10px; font-size: 14.5px; color: var(--text-light); }

/* ---------- 荣誉 ---------- */
.honor-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.honor-card {
  background: linear-gradient(160deg, #ffffff, #f3f9fe);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 30px;
  transition: transform 0.3s, box-shadow 0.3s;
}
.honor-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.honor-card .year-chip {
  display: inline-block;
  background: var(--blue);
  color: #fff;
  border-radius: 8px;
  padding: 3px 14px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
}
.honor-card h4 { margin-top: 18px; font-size: 19px; color: var(--blue-deep); line-height: 1.6; }
.honor-card p { margin-top: 10px; font-size: 14px; color: var(--text-light); }

/* ---------- CTA ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--blue-deep) 0%, var(--blue-dark) 60%, var(--sky) 130%);
  color: #fff;
  padding: 76px 0;
  text-align: center;
}
.cta-band h3 { font-size: 32px; letter-spacing: 4px; }
.cta-band p { margin-top: 14px; color: rgba(255, 255, 255, 0.85); font-size: 17px; }
.cta-band .hotline-big {
  margin-top: 26px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.35);
  padding: 16px 42px;
  border-radius: 100px;
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 1px;
  color: inherit;          /* 作为链接时不改变文字颜色 */
  text-decoration: none;   /* 不显示下划线 */
  transition: background 0.25s, border-color 0.25s;
}
.cta-band .hotline-big:hover { background: rgba(255, 255, 255, 0.16); border-color: rgba(255, 255, 255, 0.55); }
.cta-band .hotline-big svg { width: 28px; height: 28px; stroke: #ffb37a; }

/* ---------- 页头横幅（内页） ---------- */
.page-hero {
  position: relative;
  height: 320px;
  background: url("../images/banner.webp") center 32% / cover no-repeat;
  display: flex;
  align-items: flex-end;
}
.page-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(11,37,64,0.35), rgba(11,37,64,0.72)); }
.page-hero .container { position: relative; z-index: 2; padding-bottom: 42px; color: #fff; }
.page-hero h1 { font-size: 40px; letter-spacing: 6px; }
.page-hero .crumb { margin-top: 10px; font-size: 14px; color: rgba(255, 255, 255, 0.8); }
.page-hero .crumb a:hover { color: #9fd4ff; }

/* ---------- 正文排版 ---------- */
.prose { max-width: 860px; margin: 0 auto; }
.prose h3.sub-h { font-size: 22px; color: var(--blue-deep); margin: 44px 0 16px; padding-left: 14px; border-left: 4px solid var(--blue); letter-spacing: 2px; }
.prose p { color: var(--text-light); margin-bottom: 16px; text-align: justify; }
.prose blockquote {
  margin: 30px 0;
  padding: 26px 30px;
  background: var(--blue-light);
  border-left: 4px solid var(--blue);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--blue-dark);
  font-size: 16.5px;
  letter-spacing: 1px;
}
.prose blockquote .from { display: block; margin-top: 10px; font-size: 13px; color: #7fa8c4; text-align: right; }

/* ---------- 时间轴 ---------- */
.timeline { position: relative; max-width: 900px; margin: 0 auto; padding: 10px 0; }
.timeline::before {
  content: "";
  position: absolute;
  left: 130px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--blue) 0%, #bfe0f5 100%);
}
.tl-item { position: relative; padding: 0 0 44px 180px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-item .tl-year {
  position: absolute;
  left: 0;
  top: -2px;
  width: 96px;
  text-align: right;
  font-size: 20px;
  font-weight: 700;
  color: var(--blue);
  font-family: Georgia, serif;
}
.tl-item::before {
  content: "";
  position: absolute;
  left: 123px;
  top: 8px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 4px solid var(--blue);
  box-shadow: 0 0 0 5px rgba(30, 127, 194, 0.14);
}
.tl-item .tl-body h4 { font-size: 18px; color: var(--blue-deep); margin-bottom: 6px; letter-spacing: 1px; }
.tl-item .tl-body p { color: var(--text-light); font-size: 15px; }

/* ---------- 组织架构图 ---------- */
.org-chart { display: flex; flex-direction: column; align-items: center; }
.org-node {
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  padding: 14px 34px;
  font-weight: 600;
  color: var(--blue-deep);
  letter-spacing: 2px;
  text-align: center;
  transition: box-shadow 0.3s, border-color 0.3s;
}
.org-node:hover { border-color: var(--blue); box-shadow: var(--shadow); }
.org-node.top { background: var(--blue-deep); color: #fff; border-color: var(--blue-deep); }
.org-node.mid { background: var(--blue); color: #fff; border-color: var(--blue); }
.org-vline { width: 2px; height: 30px; background: #b9d4e8; }
.org-hline { width: 84%; height: 2px; background: #b9d4e8; }
.org-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; width: 100%; max-width: 1000px; }
.org-row .org-node { padding: 16px 10px; }
.org-sub-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; width: 100%; max-width: 1080px; }
.org-sub-row .org-node { font-size: 14.5px; padding: 14px 6px; letter-spacing: 1px; }
.org-branch { width: 100%; max-width: 1080px; display: flex; flex-direction: column; align-items: center; }
.org-note { margin-top: 40px; font-size: 14px; color: #9db4c6; text-align: center; }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: start; }
.contact-list .c-item {
  display: flex;
  gap: 20px;
  padding: 26px 0;
  border-bottom: 1px dashed var(--line);
}
.contact-list .c-item .icon {
  flex: 0 0 52px;
  width: 52px; height: 52px;
  border-radius: 14px;
  background: var(--blue-light);
  display: flex; align-items: center; justify-content: center;
}
.contact-list .c-item .icon svg { width: 26px; height: 26px; stroke: var(--blue); }
.contact-list .c-item h4 { font-size: 17px; color: var(--blue-deep); letter-spacing: 1px; }
.contact-list .c-item p { color: var(--text-light); font-size: 15px; margin-top: 4px; }
.contact-list .c-item p b { color: var(--orange); font-size: 20px; letter-spacing: 1px; }
.qr-card {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 44px 36px;
  text-align: center;
}
.qr-card img { width: 220px; margin: 0 auto 20px; border-radius: 10px; box-shadow: var(--shadow); }
.qr-card h4 { color: var(--blue-deep); font-size: 18px; letter-spacing: 2px; }
.qr-card p { color: var(--text-light); font-size: 14px; margin-top: 6px; }
.notice-band {
  margin-top: 60px;
  background: #fff7ef;
  border: 1px solid #ffd9b8;
  border-radius: var(--radius);
  padding: 26px 32px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.notice-band svg { flex: 0 0 26px; width: 26px; height: 26px; stroke: var(--orange); margin-top: 4px; }
.notice-band p { color: #8a5a30; font-size: 14.5px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--blue-deep); color: rgba(255, 255, 255, 0.72); padding: 68px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 44px; }
/* 页脚 logo：直接复用顶部 logo.png，加白色底块保证深色字清晰 */
.footer-grid .f-logo img {
  height: 44px;
  box-sizing: content-box;      /* 全局是 border-box，这里要排除内边距对外观尺寸的影响 */
  padding: 9px 15px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
  margin-bottom: 18px;
}
.footer-grid p { font-size: 14px; line-height: 2; }
.footer-grid h5 { color: #fff; font-size: 16px; letter-spacing: 3px; margin-bottom: 20px; }
.footer-grid ul li { margin-bottom: 12px; }
.footer-grid ul a { font-size: 14px; color: rgba(255, 255, 255, 0.66); }
.footer-grid ul a:hover { color: #9fd4ff; }
.footer-grid .f-qr { text-align: center; }
.footer-grid .f-qr img { width: 120px; margin: 0 auto 10px; border-radius: 8px; background: #fff; padding: 6px; }
.footer-grid .f-qr span { font-size: 13px; color: rgba(255, 255, 255, 0.6); }
.copyright { margin-top: 54px; border-top: 1px solid rgba(255, 255, 255, 0.12); padding: 22px 0; text-align: center; font-size: 13px; color: rgba(255, 255, 255, 0.45); }
.copyright a { color: rgba(255, 255, 255, 0.55); }
.copyright a:hover { color: #9fd4ff; }

/* ---------- 回到顶部 ---------- */
.back-top {
  position: fixed;
  right: 28px;
  bottom: 34px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--blue);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: 0.3s;
  box-shadow: 0 8px 24px rgba(30, 127, 194, 0.45);
  z-index: 900;
}
.back-top.show { opacity: 1; visibility: visible; transform: none; }
.back-top:hover { background: var(--blue-dark); }

/* ---------- 滚动浮现 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero h1 { font-size: 40px; }
  .team-grid, .honor-grid { grid-template-columns: repeat(2, 1fr); }
  .mile-strip { grid-template-columns: repeat(3, 1fr); }
  .stats-band .container { grid-template-columns: repeat(2, 1fr); gap: 30px; }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .org-sub-row { grid-template-columns: repeat(3, 1fr); }
  .org-row { grid-template-columns: 1fr; width: 70%; }
  .org-hline { display: none; }
}
@media (max-width: 768px) {
  .topbar .links { display: none; }
  .nav-toggle { display: block; }
  .main-nav {
    position: fixed;
    top: 0; right: -160px;
    width: 140px; height: 100vh;
    background: #fff;
    padding: 84px 16px 24px;
    box-shadow: -12px 0 40px rgba(0, 0, 0, 0.15);
    transition: right 0.35s;
    z-index: 1200;
    overflow-y: auto;
  }
  .main-nav.open { right: 0; }
  .main-nav > ul { flex-direction: column; align-items: stretch; gap: 4px; }
  .main-nav a.nav-link { padding: 13px 6px; font-size: 16px; text-align: center; }
  .main-nav a.nav-bbs { width: 100%; align-self: center; margin: 12px auto 0; text-align: center; padding: 12px 0; }
  .nav-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.4); opacity: 0; visibility: hidden; transition: 0.3s; z-index: 1100; }
  .nav-overlay.show { opacity: 1; visibility: visible; }
  .logo img { height: 46px; }
  .hero { height: 520px; }
  .hero h1 { font-size: 32px; letter-spacing: 3px; }
  .section { padding: 60px 0; }
  .team-grid, .honor-grid, .mile-strip, .team-grid.cols-2 { grid-template-columns: 1fr; }
  .timeline::before { left: 20px; }
  .tl-item { padding-left: 58px; }
  .tl-item .tl-year { position: static; width: auto; text-align: left; margin-bottom: 6px; }
  .tl-item::before { left: 13px; }
  .page-hero h1 { font-size: 30px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-band .hotline-big { font-size: 19px; padding: 14px 22px; }
  .cta-band .hotline-big svg { width: 22px; height: 22px; flex-shrink: 0; }
  .org-sub-row { grid-template-columns: repeat(2, 1fr); }
}