/* 糖心vlog - 深夜食堂主题样式（主色 #ef4444 · 深色背景） */
:root {
  --primary: #ef4444;
  --primary-dark: #b91c1c;
  --primary-soft: rgba(239, 68, 68, 0.14);
  --bg: #0d0d13;
  --bg2: #14141c;
  --card: #1a1a24;
  --card2: #20202c;
  --text: #ececf1;
  --muted: #9a9aa8;
  --line: rgba(255, 255, 255, 0.07);
  --radius: 18px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ---------- 顶部导航 ---------- */
.navbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(13, 13, 19, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 18px; height: 64px; }
.logo { display: flex; align-items: center; gap: 8px; font-size: 20px; font-weight: 700; white-space: nowrap; }
.logo .logo-emoji { font-size: 24px; }
.nav-links { display: flex; gap: 2px; flex: 1; justify-content: center; overflow-x: auto; scrollbar-width: none; }
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a {
  padding: 8px 12px; border-radius: 10px; font-size: 14px; color: var(--muted); white-space: nowrap;
  transition: color .2s, background .2s;
}
.nav-links a:hover, .nav-links a.active { color: #fff; background: var(--primary-soft); }
.nav-btns { display: flex; gap: 10px; white-space: nowrap; }
.btn-ghost {
  border: 1px solid var(--line); padding: 8px 16px; border-radius: 12px;
  color: var(--text); font-size: 14px; transition: border-color .2s;
}
.btn-ghost:hover { border-color: var(--primary); color: #fff; }
.btn-primary {
  background: var(--primary); padding: 8px 16px; border-radius: 12px; color: #fff;
  font-size: 14px; font-weight: 600; transition: background .2s;
}
.btn-primary:hover { background: var(--primary-dark); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(135deg, #3b0a0a 0%, #b91c1c 45%, #ef4444 78%, #f97316 120%);
}
.particles { position: absolute; inset: 0; z-index: 1; pointer-events: none; }
.particle {
  position: absolute; background: rgba(255, 255, 255, 0.55); border-radius: 50%;
  opacity: 0; animation: floatUp linear infinite;
}
@keyframes floatUp {
  0% { transform: translateY(0); opacity: 0; }
  12% { opacity: 0.85; }
  80% { opacity: 0.15; }
  100% { transform: translateY(-72vh); opacity: 0; }
}
.hero-inner { position: relative; z-index: 2; text-align: center; padding: 88px 20px 72px; }
.hero h1 {
  font-size: clamp(30px, 5vw, 52px); font-weight: 800; letter-spacing: 2px;
  text-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}
.hero-sub { margin: 16px auto 0; max-width: 660px; color: rgba(255, 255, 255, 0.88); font-size: 16px; }
.search-box {
  display: flex; max-width: 560px; margin: 30px auto 0; background: #fff;
  border-radius: 999px; padding: 6px; box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}
.search-box input {
  flex: 1; border: none; outline: none; background: transparent;
  padding: 10px 18px; font-size: 15px; color: #222; min-width: 0;
}
.search-box button {
  border: none; background: var(--primary); color: #fff; width: 44px; height: 44px;
  border-radius: 50%; cursor: pointer; font-size: 18px; flex-shrink: 0; transition: background .2s;
}
.search-box button:hover { background: var(--primary-dark); }
.hero-stats { display: flex; justify-content: center; gap: 56px; margin-top: 38px; flex-wrap: wrap; }
.hero-stat .num { display: block; font-size: 27px; font-weight: 800; font-variant-numeric: tabular-nums; }
.hero-stat .label { font-size: 13px; color: rgba(255, 255, 255, 0.82); }

/* ---------- 通用区块 ---------- */
.section { padding: 70px 0; }
.section-alt { background: var(--bg2); }
.section-head { text-align: center; margin-bottom: 40px; }
.section-head h2 { font-size: 30px; font-weight: 800; }
.section-head .bar { width: 56px; height: 4px; background: var(--primary); border-radius: 2px; margin: 12px auto 0; }
.section-head p { color: var(--muted); margin-top: 10px; font-size: 15px; }

/* ---------- 视频卡片网格 ---------- */
.video-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.video-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: transform .25s, box-shadow .25s, border-color .25s;
}
.video-card:hover {
  transform: translateY(-4px); box-shadow: 0 12px 28px rgba(0, 0, 0, 0.45);
  border-color: rgba(239, 68, 68, 0.4);
}
.video-cover { position: relative; display: block; aspect-ratio: 16 / 9; overflow: hidden; background: #000; }
.video-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.video-card:hover .video-cover img { transform: scale(1.06); }
.play-btn {
  position: absolute; inset: 0; margin: auto; width: 52px; height: 52px; border-radius: 50%;
  background: rgba(239, 68, 68, 0.92); display: flex; align-items: center; justify-content: center;
  font-size: 18px; color: #fff; opacity: 0.9; transition: opacity .25s, transform .25s;
}
.video-card:hover .play-btn { transform: scale(1.12); opacity: 1; }
.duration {
  position: absolute; right: 10px; bottom: 10px; background: rgba(0, 0, 0, 0.75); color: #fff;
  font-size: 12px; padding: 3px 8px; border-radius: 8px; font-variant-numeric: tabular-nums;
}
.video-title {
  font-size: 15px; margin: 12px 14px 4px; line-height: 1.5; min-height: 45px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.video-desc {
  font-size: 12.5px; color: var(--muted); margin: 0 14px 12px;
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden;
}
.video-meta {
  display: flex; align-items: center; gap: 8px; padding: 10px 14px;
  border-top: 1px solid var(--line); font-size: 12px; color: var(--muted);
}
.meta-avatar { width: 26px; height: 26px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.meta-name { color: var(--text); font-weight: 600; font-size: 12.5px; flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.meta-views, .meta-likes { white-space: nowrap; }

/* ---------- 创作者 ---------- */
.creator-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.creator-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  text-align: center; padding: 26px 14px; transition: transform .25s, border-color .25s;
}
.creator-card:hover { transform: translateY(-4px); border-color: rgba(239, 68, 68, 0.4); }
.creator-avatar-wrap { position: relative; width: 84px; margin: 0 auto; }
.creator-avatar-wrap img { width: 84px; height: 84px; border-radius: 50%; border: 3px solid var(--primary); object-fit: cover; }
.star-badge {
  position: absolute; right: -6px; bottom: 2px; background: #f59e0b; border-radius: 50%;
  width: 30px; height: 30px; display: flex; align-items: center; justify-content: center;
  font-size: 14px; border: 2px solid var(--bg);
}
.creator-card h4 { margin-top: 12px; font-size: 15px; }
.creator-card p { color: var(--muted); font-size: 13px; margin-top: 2px; }

/* ---------- 平台特色 ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.feature-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 20px; transition: transform .25s, border-color .25s;
}
.feature-card:hover { transform: translateY(-4px); border-color: rgba(239, 68, 68, 0.45); }
.feature-icon {
  width: 52px; height: 52px; border-radius: 14px; background: var(--primary-soft);
  display: flex; align-items: center; justify-content: center; font-size: 26px; margin-bottom: 14px;
}
.feature-card h4 { font-size: 16px; margin-bottom: 6px; }
.feature-card p { font-size: 13px; color: var(--muted); }

/* ---------- 数据统计 ---------- */
.stats-band {
  background: linear-gradient(135deg, #1f0a0a, #2a1214);
  border: 1px solid rgba(239, 68, 68, 0.25); border-radius: 24px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 40px 30px; text-align: center;
}
.stat-item .num {
  font-size: 38px; font-weight: 800; font-variant-numeric: tabular-nums;
  background: linear-gradient(90deg, #f87171, #fbbf24);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat-item .label { color: var(--muted); font-size: 13px; margin-top: 4px; }

/* ---------- 用户评价 ---------- */
.testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.testimonial-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.t-head { display: flex; align-items: center; gap: 12px; }
.t-head img { width: 46px; height: 46px; border-radius: 50%; object-fit: cover; }
.t-head h4 { font-size: 14.5px; }
.stars { font-size: 13px; letter-spacing: 2px; margin-top: 2px; }
.star.on { color: #f59e0b; }
.star.off { color: #3a3a46; }
.t-text { margin-top: 12px; font-size: 13.5px; color: #c9c9d4; line-height: 1.7; }

/* ---------- 成功故事 ---------- */
.story-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.story-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 22px; position: relative; overflow: hidden; transition: transform .25s;
}
.story-card:hover { transform: translateY(-4px); }
.story-card::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--primary); }
.story-tag { font-size: 26px; }
.story-card h4 { font-size: 16.5px; margin: 10px 0 8px; line-height: 1.5; }
.story-card p { font-size: 13.5px; color: var(--muted); line-height: 1.7; }

/* ---------- APP 展示区 ---------- */
.app-wrap { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 50px; align-items: center; }
.app-copy h2 { font-size: 30px; font-weight: 800; }
.app-copy > p { color: var(--muted); margin-top: 10px; }
.app-points { list-style: none; margin-top: 26px; display: grid; gap: 16px; }
.app-point {
  display: flex; gap: 14px; align-items: flex-start; background: var(--card);
  border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px;
}
.app-point .pt-icon { font-size: 24px; flex-shrink: 0; }
.app-point h4 { font-size: 15px; }
.app-point p { font-size: 12.5px; color: var(--muted); margin-top: 2px; }
.phone {
  width: 290px; margin: 0 auto; background: var(--card2); border: 2px solid #2e2e3a;
  border-radius: 44px; padding: 12px; box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5); position: relative;
}
.phone::before {
  content: ''; position: absolute; top: 20px; left: 50%; transform: translateX(-50%);
  width: 110px; height: 22px; background: #0b0b10; border-radius: 12px; z-index: 2;
}
.phone-screen { border-radius: 32px; overflow: hidden; background: #000; }
.phone-screen img { width: 100%; height: 560px; object-fit: cover; }

/* ---------- 内页页头 ---------- */
.page-head {
  background: linear-gradient(135deg, #3b0a0a 0%, #b91c1c 60%, #ef4444 120%);
  padding: 56px 0; text-align: center; position: relative; overflow: hidden;
}
.page-head h1 { font-size: 32px; font-weight: 800; position: relative; z-index: 2; }
.page-head p { color: rgba(255, 255, 255, 0.88); margin-top: 8px; position: relative; z-index: 2; }

/* ---------- 精选页筛选 ---------- */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; margin-bottom: 34px; }
.filter-btn {
  background: var(--card); border: 1px solid var(--line); color: var(--muted);
  padding: 8px 18px; border-radius: 999px; cursor: pointer; font-size: 14px; transition: all .2s;
}
.filter-btn.active, .filter-btn:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.search-box.page-search { max-width: 460px; margin: 0 auto 24px; box-shadow: none; }
.empty-tip { grid-column: 1 / -1; text-align: center; color: var(--muted); padding: 40px 0; }

/* ---------- 关于我们页 ---------- */
.about-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px;
}
.about-card p { color: #c9c9d4; font-size: 14.5px; line-height: 1.9; margin-bottom: 12px; }
.about-card p:last-child { margin-bottom: 0; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.cta-card {
  background: linear-gradient(135deg, #3b0a0a, #b91c1c); border-radius: 24px;
  padding: 40px 30px; text-align: center;
}
.cta-card h3 { font-size: 22px; font-weight: 800; }
.cta-card p { color: rgba(255, 255, 255, 0.85); margin: 8px 0 20px; font-size: 14.5px; }
.cta-card .btn-primary { display: inline-block; padding: 12px 32px; border-radius: 999px; font-size: 15px; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); background: #0a0a0f; padding: 50px 0 30px; margin-top: 20px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 30px; }
.footer-brand .logo { font-size: 20px; margin-bottom: 10px; }
.footer-brand p { color: var(--muted); font-size: 13px; max-width: 300px; }
.footer-col h4 { font-size: 14.5px; margin-bottom: 12px; }
.footer-col a { display: block; color: var(--muted); font-size: 13px; padding: 4px 0; transition: color .2s; }
.footer-col a:hover { color: #fff; }
.copyright {
  text-align: center; color: #6b6b78; font-size: 12.5px; margin-top: 36px;
  padding-top: 20px; border-top: 1px solid var(--line);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .creator-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-band { grid-template-columns: repeat(2, 1fr); }
  .testimonial-grid { grid-template-columns: 1fr; }
  .story-grid { grid-template-columns: 1fr; }
  .app-wrap { grid-template-columns: 1fr; gap: 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .nav-links { justify-content: flex-start; }
}
@media (max-width: 480px) {
  .section { padding: 50px 0; }
  .hero-inner { padding: 60px 16px 52px; }
  .hero-stats { gap: 28px; }
  .video-grid { gap: 14px; }
  .creator-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .video-title { font-size: 13.5px; min-height: 41px; }
  .video-desc { font-size: 12px; }
  .section-head h2 { font-size: 25px; }
}