/* ============================================================
   今日校园吃瓜在线 · 共享设计系统
   风格：现代 · 可爱 · 大气 · 专业
   配色：西瓜红 × 蜜瓜绿 × 奶油黄 × 墨色 × 奶油底
   ============================================================ */

:root {
  --melon: #ff6b6b;
  --melon-deep: #ef4f4f;
  --melon-soft: #ffe3e0;
  --mint: #2ec4b6;
  --mint-deep: #17a99b;
  --mint-soft: #d9f6f1;
  --sun: #ffd166;
  --sun-soft: #fff1cf;
  --ink: #23233f;
  --ink-soft: #56567a;
  --cream: #fff8f1;
  --paper: #ffffff;
  --line: rgba(35, 35, 63, 0.09);
  --shadow-sm: 0 4px 14px rgba(35, 35, 63, 0.06);
  --shadow-md: 0 12px 32px rgba(35, 35, 63, 0.10);
  --shadow-lg: 0 24px 60px rgba(35, 35, 63, 0.14);
  --radius: 22px;
  --radius-sm: 14px;
  --nav-h: 68px;
  --font-display: "ZCOOL KuaiLe", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --grad-brand: linear-gradient(120deg, var(--melon) 0%, #ff9a6b 45%, var(--sun) 100%);
  --grad-cool: linear-gradient(135deg, var(--mint) 0%, #7bd8c8 100%);
}

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

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

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--cream);
  line-height: 1.75;
  overflow-x: hidden;
}

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

::selection { background: var(--melon); color: #fff; }

/* ---------- 通用工具类 ---------- */
.container { width: min(1180px, 92%); margin-inline: auto; }
.sec { padding: 72px 0; }
.sec--tint { background: var(--paper); }
.sec--grad { background: linear-gradient(180deg, var(--cream), var(--melon-soft)); }

.section-head { text-align: center; max-width: 640px; margin: 0 auto 44px; }
.section-head .kicker {
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 700; font-size: 13px; letter-spacing: 1px;
  color: var(--melon-deep); background: var(--melon-soft);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 14px;
}
.section-head h2 { font-family: var(--font-display); font-size: clamp(26px, 4vw, 38px); letter-spacing: 1px; }
.section-head p { color: var(--ink-soft); margin-top: 10px; font-size: 15px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 26px; border-radius: 999px;
  font-weight: 700; font-size: 15px; transition: transform .25s, box-shadow .25s, background .25s;
  will-change: transform;
}
.btn--brand { background: var(--grad-brand); color: #fff; box-shadow: 0 10px 24px rgba(255, 107, 107, .38); }
.btn--brand:hover { transform: translateY(-3px); box-shadow: 0 16px 34px rgba(255, 107, 107, .46); }
.btn--ghost { background: #fff; color: var(--ink); border: 2px solid var(--line); }
.btn--ghost:hover { border-color: var(--melon); color: var(--melon-deep); transform: translateY(-3px); }
.btn--mint { background: var(--grad-cool); color: #fff; box-shadow: 0 10px 24px rgba(46, 196, 182, .34); }
.btn--mint:hover { transform: translateY(-3px); box-shadow: 0 16px 34px rgba(46, 196, 182, .42); }
.btn--sm { padding: 9px 18px; font-size: 13px; }
.btn--block { width: 100%; }

.chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 6px 13px; border-radius: 999px; font-size: 12.5px; font-weight: 600;
  background: var(--cream); color: var(--ink-soft); border: 1px solid var(--line);
  transition: all .2s;
}
.chip:hover { background: var(--melon-soft); color: var(--melon-deep); border-color: var(--melon); }
.chip--active { background: var(--grad-brand); color: #fff; border-color: transparent; box-shadow: 0 6px 16px rgba(255,107,107,.3); }

.tag { display: inline-block; font-size: 11.5px; font-weight: 700; padding: 3px 10px; border-radius: 999px; letter-spacing: .4px; }
.tag--campus { background: var(--mint-soft); color: var(--mint-deep); }
.tag--star { background: var(--sun-soft); color: #b57f10; }
.tag--society { background: var(--melon-soft); color: var(--melon-deep); }
.tag--fun { background: #eae6ff; color: #6b5cc9; }

/* ---------- 顶部导航 ---------- */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(255, 248, 241, .82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s;
}
.site-nav.is-scrolled { box-shadow: var(--shadow-sm); }
.nav-inner { height: var(--nav-h); display: flex; align-items: center; gap: 18px; }

.brand { display: flex; align-items: center; gap: 9px; font-family: var(--font-display); font-size: 20px; letter-spacing: .5px; }
.brand .brand-icon {
  width: 40px; height: 40px; border-radius: 13px; display: grid; place-items: center;
  background: var(--grad-brand); color: #fff; font-size: 21px;
  box-shadow: 0 6px 16px rgba(255,107,107,.35);
  animation: bounce 2.4s ease-in-out infinite;
}
.brand b { background: var(--grad-brand); -webkit-background-clip: text; background-clip: text; color: transparent; }

.nav-links { display: flex; align-items: center; gap: 6px; margin-left: auto; }
.nav-links a {
  padding: 9px 15px; border-radius: 999px; font-weight: 600; font-size: 14.5px; color: var(--ink-soft);
  transition: all .2s; position: relative;
}
.nav-links a:hover { color: var(--melon-deep); background: var(--melon-soft); }
.nav-links a.active { color: #fff; background: var(--grad-brand); box-shadow: 0 6px 16px rgba(255,107,107,.3); }
.nav-cta { margin-left: 8px; }

.hamburger { display: none; margin-left: auto; width: 44px; height: 44px; border-radius: 12px; background: var(--paper); border: 1px solid var(--line); place-items: center; flex-direction: column; gap: 4px; }
.hamburger span { width: 20px; height: 2.5px; background: var(--ink); border-radius: 2px; transition: all .3s; }
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ---------- 跑马灯热搜 ---------- */
.ticker { background: var(--ink); color: #fff; overflow: hidden; position: relative; }
.ticker-inner { display: flex; width: max-content; animation: ticker 32s linear infinite; }
.ticker:hover .ticker-inner { animation-play-state: paused; }
.ticker-item { display: inline-flex; align-items: center; gap: 8px; padding: 10px 26px; font-size: 13.5px; white-space: nowrap; }
.ticker-item .dot { color: var(--sun); }
.ticker-label { position: absolute; left: 0; top: 0; bottom: 0; z-index: 2; display: flex; align-items: center; gap: 6px; padding: 0 18px; background: var(--grad-brand); font-weight: 700; font-size: 13px; letter-spacing: 1px; clip-path: polygon(0 0, 100% 0, 88% 100%, 0 100%); }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 78px 0 96px; background:
    radial-gradient(720px 420px at 88% 12%, rgba(255, 209, 102, .30), transparent 60%),
    radial-gradient(640px 420px at 6% 88%, rgba(46, 196, 182, .22), transparent 60%),
    radial-gradient(760px 520px at 30% 20%, rgba(255, 107, 107, .16), transparent 60%),
    var(--cream);
  overflow: hidden;
}
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(2px); opacity: .5; }
.hero::before { width: 240px; height: 240px; right: -60px; top: 40px; background: radial-gradient(circle at 30% 30%, rgba(255,209,102,.8), transparent 70%); animation: float 8s ease-in-out infinite; }
.hero::after { width: 180px; height: 180px; left: -50px; bottom: 60px; background: radial-gradient(circle at 60% 40%, rgba(46,196,182,.75), transparent 70%); animation: float 10s ease-in-out infinite reverse; }

.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; position: relative; z-index: 2; }
.hero-eyebrow { display: inline-flex; align-items: center; gap: 8px; background: #fff; border: 1px solid var(--line); padding: 8px 16px; border-radius: 999px; font-size: 13px; font-weight: 700; color: var(--ink-soft); box-shadow: var(--shadow-sm); margin-bottom: 20px; }
.hero-eyebrow .pulse-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--melon); box-shadow: 0 0 0 0 rgba(255,107,107,.6); animation: ping 1.6s infinite; }
.hero h1 { font-family: var(--font-display); font-size: clamp(34px, 6vw, 58px); line-height: 1.22; letter-spacing: 1px; }
.hero h1 .hl { background: var(--grad-brand); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero h1 .hl--mint { background: var(--grad-cool); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-sub { color: var(--ink-soft); font-size: 16.5px; margin: 18px 0 28px; max-width: 520px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 30px; }
.hero-stats { display: flex; gap: 30px; flex-wrap: wrap; }
.hero-stats .stat b { font-family: var(--font-display); font-size: 26px; display: block; letter-spacing: 1px; }
.hero-stats .stat span { font-size: 12.5px; color: var(--ink-soft); }

.hero-visual { position: relative; display: grid; place-items: center; }
.phone { width: 300px; border-radius: 42px; background: var(--ink); padding: 12px; box-shadow: var(--shadow-lg); transform: rotate(-4deg); transition: transform .5s; position: relative; }
.phone:hover { transform: rotate(0deg) translateY(-6px); }
.phone-screen { border-radius: 32px; background: var(--paper); overflow: hidden; }
.phone-bar { display: flex; align-items: center; gap: 8px; padding: 14px 16px 10px; }
.phone-bar .p-dot { width: 9px; height: 9px; border-radius: 50%; }
.phone-feed { padding: 4px 12px 16px; display: grid; gap: 10px; }
.phone-card { background: var(--cream); border-radius: 16px; padding: 12px; display: flex; gap: 10px; align-items: center; animation: rise 5s ease-in-out infinite; }
.phone-card:nth-child(2) { animation-delay: .6s; }
.phone-card:nth-child(3) { animation-delay: 1.2s; }
.phone-thumb { width: 54px; height: 54px; border-radius: 12px; background: var(--grad-brand); display: grid; place-items: center; font-size: 22px; flex-shrink: 0; }
.phone-card:nth-child(2) .phone-thumb { background: var(--grad-cool); }
.phone-card:nth-child(3) .phone-thumb { background: linear-gradient(135deg, #ffd166, #ff9a6b); }
.phone-card b { font-size: 12.5px; display: block; line-height: 1.4; }
.phone-card span { font-size: 11px; color: var(--ink-soft); }
.float-emoji { position: absolute; font-size: 34px; animation: float 6s ease-in-out infinite; filter: drop-shadow(0 8px 16px rgba(35,35,63,.18)); z-index: 3; }
.float-emoji.e1 { top: -18px; left: 6%; }
.float-emoji.e2 { bottom: 30px; right: -4px; font-size: 46px; animation-delay: 1.2s; }
.float-emoji.e3 { top: 40%; right: 14%; font-size: 26px; animation-delay: 2s; }

/* ---------- 分类导览 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.cat-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 14px; text-align: center; transition: transform .3s, box-shadow .3s;
  box-shadow: var(--shadow-sm); position: relative; overflow: hidden;
}
.cat-card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 4px; background: var(--grad-brand); transform: scaleX(0); transition: transform .3s; }
.cat-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }
.cat-card:hover::before { transform: scaleX(1); }
.cat-card .emoji { font-size: 34px; display: block; margin-bottom: 10px; }
.cat-card b { font-size: 15px; }
.cat-card span { font-size: 12px; color: var(--ink-soft); display: block; margin-top: 4px; }

/* ---------- 瓜单排行 ---------- */
.rank-wrap { display: grid; grid-template-columns: 1.25fr .75fr; gap: 26px; align-items: start; }
.rank-list { display: grid; gap: 14px; }
.rank-item {
  display: flex; gap: 16px; align-items: center; background: #fff;
  border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 20px;
  box-shadow: var(--shadow-sm); transition: transform .25s, box-shadow .25s, border-color .25s;
}
.rank-item:hover { transform: translateX(6px); border-color: var(--melon); box-shadow: var(--shadow-md); }
.rank-no { font-family: var(--font-display); font-size: 26px; width: 44px; height: 44px; display: grid; place-items: center; border-radius: 14px; flex-shrink: 0; background: var(--cream); color: var(--ink-soft); }
.rank-item:nth-child(-n+3) .rank-no { background: var(--grad-brand); color: #fff; box-shadow: 0 6px 14px rgba(255,107,107,.35); }
.rank-info { flex: 1; min-width: 0; }
.rank-info h3 { font-size: 15.5px; font-weight: 700; line-height: 1.45; }
.rank-meta { display: flex; gap: 12px; align-items: center; margin-top: 6px; font-size: 12px; color: var(--ink-soft); flex-wrap: wrap; }
.heat { flex-shrink: 0; width: 110px; }
.heat-bar { height: 8px; border-radius: 99px; background: var(--cream); overflow: hidden; }
.heat-bar i { display: block; height: 100%; border-radius: 99px; background: var(--grad-brand); }
.heat span { font-size: 11.5px; color: var(--ink-soft); }
.rank-go { padding: 9px 16px; border-radius: 999px; background: var(--melon-soft); color: var(--melon-deep); font-size: 13px; font-weight: 700; transition: all .2s; flex-shrink: 0; }
.rank-go:hover { background: var(--grad-brand); color: #fff; }

.aside-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); margin-bottom: 20px; }
.aside-card h3 { font-family: var(--font-display); font-size: 19px; margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.aside-list li { display: flex; gap: 10px; padding: 11px 0; border-bottom: 1px dashed var(--line); font-size: 13.5px; }
.aside-list li:last-child { border-bottom: none; }
.aside-list .idx { color: var(--melon); font-weight: 800; }
.aside-list b { font-weight: 600; line-height: 1.5; }

.note-demo { font-size: 12.5px; color: var(--ink-soft); display: flex; align-items: center; gap: 6px; margin-top: 18px; }

/* ---------- 视频卡片 ---------- */
.video-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.video-card {
  background: #fff; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line);
  box-shadow: var(--shadow-sm); transition: transform .3s, box-shadow .3s; position: relative;
}
.video-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.video-thumb { position: relative; aspect-ratio: 16 / 10; overflow: hidden; }
.video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.video-card:hover .video-thumb img { transform: scale(1.08); }
.video-thumb .play {
  position: absolute; inset: 0; display: grid; place-items: center;
  background: rgba(35,35,63,.25); color: #fff; font-size: 40px; opacity: 0; transition: opacity .3s;
}
.video-card:hover .play { opacity: 1; }
.video-thumb .dur { position: absolute; right: 10px; bottom: 10px; background: rgba(35,35,63,.8); color: #fff; font-size: 11.5px; padding: 3px 8px; border-radius: 8px; }
.video-thumb .live { position: absolute; left: 10px; top: 10px; background: var(--melon); color: #fff; font-size: 11px; font-weight: 800; padding: 3px 9px; border-radius: 8px; display: flex; align-items: center; gap: 4px; }
.video-body { padding: 14px 16px 16px; }
.video-body h3 { font-size: 14.5px; font-weight: 700; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 44px; }
.video-meta { display: flex; align-items: center; justify-content: space-between; margin-top: 12px; color: var(--ink-soft); font-size: 12px; }
.video-meta .au { display: flex; align-items: center; gap: 7px; }
.avatar { width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; color: #fff; font-size: 12px; font-weight: 800; flex-shrink: 0; }
.like-btn { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; color: var(--ink-soft); transition: color .2s; }
.like-btn:hover, .like-btn.liked { color: var(--melon); }

/* ---------- 社区动态 ---------- */
.feed-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feed-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow-sm); transition: transform .3s, box-shadow .3s; }
.feed-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.feed-head { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.feed-head .avatar { width: 40px; height: 40px; font-size: 16px; }
.feed-head b { font-size: 14px; display: block; line-height: 1.3; }
.feed-head span { font-size: 11.5px; color: var(--ink-soft); }
.feed-card p { font-size: 14px; color: var(--ink-soft); line-height: 1.8; }
.feed-foot { display: flex; gap: 16px; margin-top: 14px; font-size: 12.5px; color: var(--ink-soft); }
.feed-foot span { display: inline-flex; align-items: center; gap: 5px; }

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  border-radius: 30px; padding: 52px 48px; color: #fff; text-align: center; position: relative; overflow: hidden;
  background: linear-gradient(120deg, var(--melon) 0%, #ff8f6b 50%, var(--sun) 100%);
  box-shadow: var(--shadow-lg);
}
.cta-banner::before, .cta-banner::after { content: "🍉"; position: absolute; font-size: 110px; opacity: .16; }
.cta-banner::before { top: -20px; left: -10px; transform: rotate(-18deg); }
.cta-banner::after { bottom: -34px; right: 0; transform: rotate(22deg); font-size: 150px; }
.cta-banner h2 { font-family: var(--font-display); font-size: clamp(26px, 4vw, 40px); letter-spacing: 1px; }
.cta-banner p { margin: 12px auto 26px; max-width: 560px; opacity: .94; }
.cta-banner .btn { background: #fff; color: var(--melon-deep); }
.cta-banner .btn:hover { transform: translateY(-3px); }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--ink); color: #c9c9de; padding: 56px 0 26px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 34px; }
.footer-brand .brand { color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 13.5px; line-height: 1.9; }
.footer-col h4 { color: #fff; font-size: 14.5px; margin-bottom: 16px; letter-spacing: 1px; }
.footer-col a { display: block; padding: 5px 0; font-size: 13.5px; color: #c9c9de; transition: color .2s; }
.footer-col a:hover { color: var(--sun); }
.footer-safe { display: flex; flex-wrap: wrap; gap: 8px; }
.footer-safe span { font-size: 11.5px; padding: 5px 11px; border: 1px solid rgba(255,255,255,.16); border-radius: 999px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); margin-top: 40px; padding-top: 22px; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap; font-size: 12.5px; }

/* ---------- 页面头图 ---------- */
.page-hero { padding: 60px 0 50px; position: relative; overflow: hidden; }
.page-hero h1 { font-family: var(--font-display); font-size: clamp(30px, 5vw, 46px); letter-spacing: 1px; }
.page-hero p { color: var(--ink-soft); margin-top: 12px; max-width: 600px; }
.page-hero .crumb { font-size: 12.5px; color: var(--ink-soft); margin-bottom: 14px; }
.page-hero .crumb b { color: var(--melon-deep); }

/* ---------- 筛选条 ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }

/* ---------- 榜单大表 ---------- */
.board { background: #fff; border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow-sm); overflow: hidden; }
.board-row { display: flex; align-items: center; gap: 16px; padding: 18px 22px; border-bottom: 1px solid var(--line); transition: background .2s; }
.board-row:last-child { border-bottom: none; }
.board-row:hover { background: var(--cream); }
.board-row .rank-no { font-size: 22px; width: 40px; height: 40px; }
.board-row h3 { font-size: 15px; flex: 1; min-width: 0; line-height: 1.5; }
.board-row .heat { width: 160px; }
.board-row .cnt { font-size: 12px; color: var(--ink-soft); white-space: nowrap; }

/* ---------- 视频页 masonry ---------- */
.masonry { columns: 4; column-gap: 22px; }
.masonry .video-card { break-inside: avoid; margin-bottom: 22px; display: inline-block; width: 100%; }
.masonry .video-thumb { aspect-ratio: auto; }
.masonry .video-thumb img { height: auto; min-height: 140px; }
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeUp .4s ease; }

/* ---------- 下载页 ---------- */
.dl-hero { background:
    radial-gradient(560px 380px at 12% 20%, rgba(255, 209, 102, .32), transparent 60%),
    radial-gradient(620px 420px at 90% 80%, rgba(46, 196, 182, .26), transparent 60%),
    var(--cream);
  padding: 64px 0 80px; position: relative; overflow: hidden;
}
.dl-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 46px; align-items: center; }
.dl-features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 24px 0 30px; }
.dl-feature { display: flex; gap: 12px; align-items: flex-start; background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 15px 16px; box-shadow: var(--shadow-sm); }
.dl-feature .ico { font-size: 22px; flex-shrink: 0; }
.dl-feature b { font-size: 14px; display: block; }
.dl-feature span { font-size: 12px; color: var(--ink-soft); }
.store-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.store-btn { display: flex; align-items: center; gap: 12px; background: var(--ink); color: #fff; padding: 13px 22px; border-radius: 16px; transition: transform .25s, box-shadow .25s; }
.store-btn:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.store-btn .ico { font-size: 26px; }
.store-btn small { display: block; font-size: 10.5px; opacity: .75; line-height: 1.2; }
.store-btn b { font-size: 15px; line-height: 1.2; }

.qr-box { background: #fff; border-radius: 26px; padding: 26px; text-align: center; box-shadow: var(--shadow-md); border: 1px solid var(--line); max-width: 300px; margin-inline: auto; }
.qr-box svg { width: 190px; height: 190px; margin: 6px auto 12px; border-radius: 14px; }
.qr-box b { font-size: 15px; }
.qr-box span { font-size: 12px; color: var(--ink-soft); display: block; margin-top: 6px; }

.compare-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.compare-table th, .compare-table td { padding: 16px 18px; text-align: left; font-size: 14px; border-bottom: 1px solid var(--line); }
.compare-table th { background: var(--ink); color: #fff; font-weight: 700; }
.compare-table tr:last-child td { border-bottom: none; }
.compare-table .me { background: var(--melon-soft); }
.compare-table .yes { color: var(--mint-deep); font-weight: 800; }
.compare-table .no { color: #c4c4d4; }

.faq-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm); margin-bottom: 12px; overflow: hidden; box-shadow: var(--shadow-sm); }
.faq-q { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 18px 22px; font-size: 15px; font-weight: 700; text-align: left; }
.faq-q .arr { transition: transform .3s; color: var(--melon); font-size: 18px; }
.faq-item.open .arr { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a p { padding: 0 22px 20px; font-size: 14px; color: var(--ink-soft); }

/* ---------- 关于页 ---------- */
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.value-card { background: #fff; border-radius: var(--radius); border: 1px solid var(--line); padding: 30px 26px; box-shadow: var(--shadow-sm); transition: transform .3s, box-shadow .3s; }
.value-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }
.value-card .emoji { font-size: 40px; display: block; margin-bottom: 14px; }
.value-card h3 { font-family: var(--font-display); font-size: 20px; margin-bottom: 10px; }
.value-card p { font-size: 13.5px; color: var(--ink-soft); }

.guide-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.guide-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow-sm); display: flex; gap: 14px; align-items: flex-start; transition: transform .25s; }
.guide-card:hover { transform: translateY(-5px); }
.guide-card .num { font-family: var(--font-display); font-size: 26px; color: var(--melon); flex-shrink: 0; }
.guide-card h3 { font-size: 15.5px; margin-bottom: 6px; }
.guide-card p { font-size: 12.8px; color: var(--ink-soft); }

.timeline { position: relative; max-width: 720px; margin-inline: auto; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 4px; bottom: 4px; width: 3px; border-radius: 3px; background: var(--grad-brand); }
.tl-item { position: relative; margin-bottom: 26px; }
.tl-item::before { content: ""; position: absolute; left: -30px; top: 6px; width: 16px; height: 16px; border-radius: 50%; background: #fff; border: 4px solid var(--melon); }
.tl-item h3 { font-size: 16px; }
.tl-item time { font-size: 12px; color: var(--melon-deep); font-weight: 700; }
.tl-item p { font-size: 13.5px; color: var(--ink-soft); margin-top: 6px; }

/* ---------- 表单 ---------- */
.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow-sm); max-width: 560px; margin-inline: auto; }
.form-card label { display: block; font-size: 13.5px; font-weight: 700; margin: 16px 0 6px; }
.form-card input, .form-card textarea, .form-card select { width: 100%; border: 1.5px solid var(--line); border-radius: var(--radius-sm); padding: 12px 14px; font-size: 14px; background: var(--cream); transition: border-color .2s; }
.form-card input:focus, .form-card textarea:focus, .form-card select:focus { outline: none; border-color: var(--melon); background: #fff; }
.form-card textarea { min-height: 110px; resize: vertical; }
.form-card .btn { margin-top: 20px; }

/* ---------- Toast / BackTop ---------- */
.toast {
  position: fixed; left: 50%; bottom: 34px; transform: translate(-50%, 20px);
  background: var(--ink); color: #fff; padding: 13px 24px; border-radius: 999px; font-size: 14px;
  box-shadow: var(--shadow-lg); opacity: 0; pointer-events: none; transition: all .35s; z-index: 300;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.backtop { position: fixed; right: 22px; bottom: 22px; width: 48px; height: 48px; border-radius: 50%; background: var(--grad-brand); color: #fff; font-size: 20px; box-shadow: var(--shadow-md); opacity: 0; transform: translateY(16px); transition: all .3s; z-index: 200; }
.backtop.show { opacity: 1; transform: translateY(0); }
.backtop:hover { transform: translateY(-4px); }

/* ---------- 动画 ---------- */
@keyframes float { 0%, 100% { transform: translateY(0) rotate(0); } 50% { transform: translateY(-16px) rotate(4deg); } }
@keyframes bounce { 0%, 100% { transform: translateY(0); } 40% { transform: translateY(-4px); } 60% { transform: translateY(2px); } }
@keyframes ping { 0% { box-shadow: 0 0 0 0 rgba(255,107,107,.55); } 80% { box-shadow: 0 0 0 12px rgba(255,107,107,0); } 100% { box-shadow: 0 0 0 0 rgba(255,107,107,0); } }
@keyframes ticker { from { transform: translateX(0); } to { transform: translateX(-50%); } }
@keyframes rise { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }

.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: .08s; }
.reveal-delay-2 { transition-delay: .16s; }
.reveal-delay-3 { transition-delay: .24s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .cat-grid { grid-template-columns: repeat(3, 1fr); }
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .feed-grid { grid-template-columns: repeat(2, 1fr); }
  .masonry { columns: 3; }
  .value-grid, .guide-list { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 820px) {
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0; flex-direction: column; align-items: stretch; gap: 4px;
    background: rgba(255, 248, 241, .97); backdrop-filter: blur(14px);
    padding: 16px 6vw 24px; border-bottom: 1px solid var(--line);
    transform: translateY(-16px); opacity: 0; pointer-events: none; transition: all .3s;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 13px 16px; }
  .hamburger { display: grid; }
  .nav-cta { margin-left: 0; margin-top: 6px; }
  .hero-grid, .dl-grid { grid-template-columns: 1fr; }
  .hero { padding: 54px 0 70px; }
  .hero-visual { order: -1; margin-bottom: 10px; }
  .rank-wrap { grid-template-columns: 1fr; }
  .board-row { flex-wrap: wrap; }
  .board-row .heat { width: 100%; }
}

@media (max-width: 560px) {
  .sec { padding: 52px 0; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid, .feed-grid { grid-template-columns: 1fr; }
  .masonry { columns: 2; column-gap: 14px; }
  .masonry .video-card { margin-bottom: 14px; }
  .hero-stats { gap: 18px; }
  .dl-features { grid-template-columns: 1fr; }
  .value-grid, .guide-list { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 40px 22px; }
  .phone { width: 260px; }
  .ticker-label { display: none; }
  .compare-table th, .compare-table td { padding: 11px 10px; font-size: 12.5px; }
}