/* ==========================================================================
   每日大赛全民体育挑战平台 每日大瓜网红大赛百度 — 全局样式
   设计语言：动感科技运动风
   主色 活力橙 #FF5722 / 运动科技蓝 #1E88E5 / 荧光绿 #00E676 / 深邃黑 #121212
   ========================================================================== */

:root {
  --orange: #FF5722;
  --orange-d: #E64A19;
  --blue: #1E88E5;
  --blue-d: #1565C0;
  --green: #00E676;
  --ink: #121212;
  --ink-2: #1A1A1A;
  --card-dark: #2C2C2C;
  --bg: #F5F7FA;
  --white: #FFFFFF;
  --text: #333333;
  --text-light: #E0E0E0;
  --muted: #777;
  --shadow: 0 10px 30px rgba(30, 41, 59, 0.10);
  --shadow-sport: 0 8px 24px rgba(255, 87, 34, 0.18);
  --radius: 14px;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --header-h: 72px;
  --maxw: 1240px;
  --ff-title: "Oswald", "Noto Sans SC", sans-serif;
  --ff-body: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --ff-num: "Teko", "Oswald", sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--ff-body);
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

h1, h2, h3, h4 { font-family: var(--ff-title); font-weight: 700; line-height: 1.1; letter-spacing: .5px; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

.accent { color: var(--orange); }
.accent-blue { color: var(--blue); }
.accent-green { color: var(--green); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--ff-title); font-weight: 600; font-size: 15px;
  text-transform: uppercase; letter-spacing: 1px;
  padding: 13px 28px; border: none; border-radius: 50px; cursor: pointer;
  transition: transform .16s var(--ease-out), box-shadow .25s var(--ease-out), background .25s;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: linear-gradient(135deg, var(--orange), var(--orange-d)); color: #fff; box-shadow: var(--shadow-sport); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(255,87,34,.35); }
.btn-blue { background: linear-gradient(135deg, var(--blue), var(--blue-d)); color: #fff; box-shadow: 0 8px 24px rgba(30,136,229,.22); }
.btn-blue:hover { transform: translateY(-2px); }
.btn-ghost { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,.6); }
.btn-ghost:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-outline { background: transparent; color: var(--orange); border: 2px solid var(--orange); }
.btn-outline:hover { background: var(--orange); color: #fff; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; height: var(--header-h); z-index: 1000;
  display: flex; align-items: center;
  background: rgba(18,18,18,.92); backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background .3s;
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { width: 40px; height: 40px; }
.brand .brand-name { font-family: var(--ff-title); font-weight: 700; font-size: 22px; color: #fff; text-transform: uppercase; letter-spacing: 1px; }
.brand .brand-name span { color: var(--orange); }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  position: relative; color: var(--text-light); font-weight: 500; font-size: 15px;
  padding: 8px 14px; border-radius: 8px; transition: color .2s, background .2s;
}
.main-nav a:hover, .main-nav a.active { color: #fff; }
.main-nav a::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 2px;
  background: var(--orange); transform: scaleX(0); transform-origin: left; transition: transform .25s var(--ease-out);
}
.main-nav a:hover::after, .main-nav a.active::after { transform: scaleX(1); }
.header-actions { display: flex; align-items: center; gap: 12px; }
.icon-btn { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 50%; background: rgba(255,255,255,.08); color: #fff; border: none; cursor: pointer; transition: background .2s; }
.icon-btn:hover { background: var(--orange); }

.nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 26px; cursor: pointer; }

/* 移动端抽屉 */
.mobile-nav {
  position: fixed; top: var(--header-h); left: 0; right: 0; z-index: 999;
  background: var(--ink); border-bottom: 1px solid rgba(255,255,255,.08);
  transform: translateY(-120%); transition: transform .3s var(--ease-out); padding: 12px 0;
}
.mobile-nav.open { transform: translateY(0); }
.mobile-nav a { display: block; color: var(--text-light); padding: 12px 24px; font-weight: 500; }
.mobile-nav a:hover { background: rgba(255,87,34,.15); color: #fff; }

/* ---------- 通用区块 ---------- */
.section { padding: 84px 0; }
.section-dark { background: var(--ink-2); color: var(--text-light); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
.section-head .eyebrow {
  display: inline-block; font-family: var(--ff-title); font-weight: 600; letter-spacing: 3px;
  text-transform: uppercase; color: var(--orange); font-size: 14px; margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(30px, 4.5vw, 48px); color: inherit; }
.section-head .lead { margin-top: 16px; color: var(--muted); font-size: 17px; }
.section-dark .section-head .lead { color: #9aa0a6; }
.section-head h2 em { font-style: normal; color: var(--orange); }

/* 斜切分隔 */
.skew-top { clip-path: polygon(0 4vw, 100% 0, 100% 100%, 0 100%); }
.skew-both { clip-path: polygon(0 4vw, 100% 0, 100% calc(100% - 4vw), 0 100%); }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 26px; }
.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(--white); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); transition: transform .3s var(--ease-out), box-shadow .3s;
  display: flex; flex-direction: column;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 18px 40px rgba(30,41,59,.16); }
.card .card-img { position: relative; aspect-ratio: 4/3; overflow: hidden; }
.card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease-out); }
.card:hover .card-img img { transform: scale(1.06); }
.card .tag {
  position: absolute; top: 12px; left: 12px; background: var(--orange); color: #fff;
  font-family: var(--ff-title); font-size: 12px; font-weight: 600; letter-spacing: 1px;
  padding: 4px 12px; border-radius: 50px; text-transform: uppercase;
}
.card .tag.blue { background: var(--blue); }
.card .tag.green { background: var(--green); color: var(--ink); }
.card .card-body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.card .card-body h3 { font-size: 21px; color: var(--ink); margin-bottom: 8px; }
.card .card-body p { color: var(--muted); font-size: 15px; flex: 1; }
.card .card-foot { margin-top: 16px; display: flex; align-items: center; justify-content: space-between; }
.card .more { color: var(--orange); font-weight: 600; font-family: var(--ff-title); letter-spacing: 1px; text-transform: uppercase; font-size: 14px; }

/* 暗黑卡片 */
.section-dark .card { background: var(--card-dark); border: 1px solid rgba(0,230,118,.25); box-shadow: 0 8px 24px rgba(0,0,0,.4); }
.section-dark .card .card-body h3 { color: #fff; }
.section-dark .card .card-body p { color: #9aa0a6; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--ink); color: var(--text-light); padding: 64px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
.footer-grid h4 { color: #fff; font-size: 16px; letter-spacing: 1px; margin-bottom: 18px; text-transform: uppercase; }
.footer-grid a { color: #9aa0a6; font-size: 14px; line-height: 2.1; transition: color .2s; }
.footer-grid a:hover { color: var(--orange); }
.footer-brand p { color: #9aa0a6; font-size: 14px; margin: 16px 0; max-width: 320px; }
.footer-brand .brand-name { color: #fff; }
.social { display: flex; gap: 10px; }
.social a { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 50%; background: rgba(255,255,255,.08); color: #fff; }
.social a:hover { background: var(--orange); }
.footer-bottom { margin-top: 44px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.1); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; color: #777; font-size: 13px; }
.footer-bottom a { color: #777; }
.footer-bottom a:hover { color: var(--orange); }

/* ---------- 面包屑 ---------- */
.breadcrumb { padding: calc(var(--header-h) + 28px) 0 0; }
.breadcrumb ol { display: flex; flex-wrap: wrap; gap: 8px; font-size: 14px; color: var(--muted); }
.breadcrumb a:hover { color: var(--orange); }
.breadcrumb li::after { content: "/"; margin-left: 8px; color: #ccc; }
.breadcrumb li:last-child::after { content: ""; }

/* ---------- 页面横幅 ---------- */
.page-hero {
  position: relative; margin-top: var(--header-h); min-height: 360px; display: flex; align-items: center;
  color: #fff; overflow: hidden;
}
.page-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(18,18,18,.86), rgba(18,18,18,.45)); z-index: 1; }
.page-hero img.bg { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.page-hero .container { position: relative; z-index: 2; padding-top: 40px; padding-bottom: 40px; }
.page-hero .eyebrow { color: var(--green); font-family: var(--ff-title); letter-spacing: 3px; text-transform: uppercase; font-size: 14px; }
.page-hero h1 { font-size: clamp(34px, 6vw, 64px); margin: 12px 0; }
.page-hero p { max-width: 620px; color: #ddd; font-size: 17px; }

/* ---------- 栏目布局（主区 + 侧栏） ---------- */
.layout { display: grid; grid-template-columns: 1fr 320px; gap: 40px; }
.sidebar .widget { background: #fff; border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); margin-bottom: 24px; }
.sidebar .widget h4 { font-size: 18px; color: var(--ink); margin-bottom: 16px; padding-bottom: 12px; border-bottom: 3px solid var(--orange); display: inline-block; }
.sidebar .reco { display: flex; gap: 12px; padding: 10px 0; border-bottom: 1px dashed #e5e7eb; }
.sidebar .reco:last-child { border-bottom: none; }
.sidebar .reco img { width: 72px; height: 56px; object-fit: cover; border-radius: 8px; }
.sidebar .reco h5 { font-family: var(--ff-body); font-size: 14px; color: var(--text); line-height: 1.4; }
.sidebar .reco span { font-size: 12px; color: var(--muted); }

.prose h2 { font-size: 28px; color: var(--ink); margin: 28px 0 14px; }
.prose h3 { font-size: 21px; color: var(--ink); margin: 22px 0 10px; }
.prose p { margin-bottom: 16px; }
.prose ul.bullet { margin: 0 0 18px 20px; list-style: disc; }
.prose ul.bullet li { margin-bottom: 8px; }

/* 数据表 */
.table-wrap { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow); background: #fff; }
table.data { width: 100%; border-collapse: collapse; min-width: 560px; }
table.data th { background: var(--ink-2); color: #fff; font-family: var(--ff-title); letter-spacing: 1px; padding: 14px 16px; text-align: left; font-size: 14px; text-transform: uppercase; }
table.data td { padding: 13px 16px; border-bottom: 1px solid #eef1f4; font-size: 15px; }
table.data tr:nth-child(even) td { background: #fafbfc; }
table.data .rank { font-family: var(--ff-num); font-size: 22px; color: var(--orange); font-weight: 600; }

/* ---------- 通用工具 ---------- */
.text-center { text-align: center; }
.mt-40 { margin-top: 40px; }
.tag-pill { display: inline-block; background: rgba(255,87,34,.12); color: var(--orange); font-size: 13px; font-weight: 600; padding: 4px 12px; border-radius: 50px; margin: 0 6px 8px 0; }

/* 进度入场动画 */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .6s var(--ease-out), transform .6s var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .main-nav, .header-actions .icon-btn.search-open { display: none; }
  .nav-toggle { display: block; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}