/* ===== 糖心vlog 04套样式（生活主题 · 深色背景 · 主色 #ef4444） ===== */
:root {
  --bg: #0d1015;
  --bg-2: #10141b;
  --surface: #171c25;
  --surface-2: #1e2531;
  --border: rgba(255, 255, 255, .08);
  --border-2: rgba(255, 255, 255, .14);
  --text: #e9edf3;
  --muted: #96a1b2;
  --primary: #ef4444;
  --primary-2: #f97316;
  --primary-soft: rgba(239, 68, 68, .15);
  --grad: linear-gradient(135deg, #ef4444 0%, #f97316 100%);
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
}
* { 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;
  min-height: 100vh;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
::selection { background: rgba(239, 68, 68, .4); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 顶部导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(13, 16, 21, .88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.nav-inner { display: flex; align-items: center; gap: 20px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; white-space: nowrap; }
.brand .logo {
  width: 38px; height: 38px; border-radius: 12px; background: var(--grad);
  display: flex; align-items: center; justify-content: center; font-size: 20px;
  box-shadow: 0 4px 14px rgba(239, 68, 68, .4);
}
.nav-links { display: flex; gap: 4px; flex: 1; justify-content: center; }
.nav-links a { padding: 8px 12px; border-radius: 10px; color: var(--muted); font-size: 14px; transition: .2s; }
.nav-links a:hover { color: var(--text); background: var(--surface-2); }
.nav-links a.active { color: #fff; background: var(--primary-soft); }
.nav-actions { display: flex; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 9px 20px; border-radius: 999px; font-size: 14px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: .2s; font-family: inherit;
}
.btn-ghost { background: transparent; border-color: var(--border-2); color: var(--text); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary-2); }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 6px 18px rgba(239, 68, 68, .35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(239, 68, 68, .45); }

/* ===== Hero 区 ===== */
.hero {
  position: relative; overflow: hidden; text-align: center; padding: 88px 0 72px;
  background:
    radial-gradient(900px 420px at 20% -10%, rgba(239, 68, 68, .28), transparent 60%),
    radial-gradient(800px 400px at 85% 0%, rgba(249, 115, 22, .18), transparent 55%),
    linear-gradient(180deg, #10141b, #0d1015);
}
.particles { position: absolute; inset: 0; pointer-events: none; }
.particles span {
  position: absolute; border-radius: 50%; background: var(--primary);
  box-shadow: 0 0 12px rgba(239, 68, 68, .7);
  animation: floatUp linear infinite;
}
@keyframes floatUp {
  0% { transform: translateY(30px) scale(.6); }
  50% { opacity: .8; }
  100% { transform: translateY(-600px) scale(1.2); }
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 16px;
  border-radius: 999px; background: var(--primary-soft); border: 1px solid rgba(239, 68, 68, .35);
  color: #fca5a5; font-size: 13px; margin-bottom: 22px;
}
.hero h1 {
  font-size: 46px; line-height: 1.25; margin-bottom: 16px;
  background: linear-gradient(90deg, #fff, #fecaca);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .sub { color: var(--muted); font-size: 17px; max-width: 620px; margin: 0 auto 32px; }
.search-box {
  display: flex; max-width: 620px; margin: 0 auto 36px; align-items: center;
  background: var(--surface); border: 1px solid var(--border-2);
  border-radius: 999px; padding: 6px 6px 6px 22px; box-shadow: var(--shadow);
}
.search-box input { flex: 1; background: none; border: none; outline: none; color: var(--text); font-size: 15px; }
.search-box input::placeholder { color: #5d6877; }
.search-box .btn { border-radius: 999px; padding: 10px 26px; }
.hero-stats { display: flex; justify-content: center; gap: 56px; flex-wrap: wrap; }
.hero-stats .item { text-align: center; }
.hero-stats .num { font-size: 30px; font-weight: 800; color: #fff; font-variant-numeric: tabular-nums; }
.hero-stats .label { color: var(--muted); font-size: 13px; margin-top: 2px; }

/* ===== 通用区块 ===== */
.section { padding: 64px 0; }
.section-head { text-align: center; margin-bottom: 36px; }
.kicker { display: inline-block; color: #f87171; font-size: 13px; letter-spacing: 2px; margin-bottom: 8px; }
.section-head h2 { font-size: 30px; }
.section-head p { color: var(--muted); margin-top: 8px; }

/* ===== 视频卡片 ===== */
.video-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.video-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; transition: .25s; cursor: pointer;
}
.video-card:hover { transform: translateY(-6px); border-color: rgba(239, 68, 68, .45); box-shadow: 0 16px 36px rgba(0, 0, 0, .45); }
.video-cover { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.video-cover img { width: 100%; height: 100%; object-fit: cover; transition: .4s; }
.video-card:hover .video-cover img { transform: scale(1.06); }
.play-btn {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(.7);
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(239, 68, 68, .92); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; padding-left: 4px; opacity: 0; transition: .25s;
  box-shadow: 0 8px 20px rgba(0, 0, 0, .4);
}
.video-card:hover .play-btn { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.duration {
  position: absolute; right: 10px; bottom: 10px;
  background: rgba(0, 0, 0, .72); color: #fff; font-size: 12px;
  padding: 3px 8px; border-radius: 8px; font-variant-numeric: tabular-nums;
}
.video-info { padding: 14px 14px 16px; }
.v-title {
  font-size: 15px; font-weight: 600; min-height: 44px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.v-desc {
  color: var(--muted); font-size: 13px; margin: 6px 0 12px;
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden;
}
.v-meta { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); }
.v-avatar { width: 24px; height: 24px; border-radius: 50%; border: 2px solid rgba(239, 68, 68, .5); }
.v-name { font-weight: 600; color: #cdd5e0; }
.v-stats { margin-left: auto; color: #8b96a6; }

/* ===== 明星创作者 ===== */
.creator-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 18px; }
.creator-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 14px; text-align: center; transition: .25s;
}
.creator-card:hover { transform: translateY(-5px); border-color: rgba(239, 68, 68, .4); }
.c-avatar { position: relative; width: 76px; height: 76px; margin: 0 auto 12px; }
.c-avatar img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; border: 3px solid rgba(239, 68, 68, .6); }
.c-star { position: absolute; right: -2px; bottom: 2px; font-size: 18px; filter: drop-shadow(0 2px 4px rgba(0, 0, 0, .5)); }
.creator-card h4 { font-size: 15px; }
.c-tag { color: var(--muted); font-size: 12px; margin: 4px 0 8px; }
.c-fans {
  display: inline-block; font-size: 12px; color: #f87171;
  background: var(--primary-soft); padding: 4px 12px; border-radius: 999px;
}

/* ===== 平台特色 ===== */
.features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.feature-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 22px; transition: .25s;
}
.feature-card:hover { transform: translateY(-5px); border-color: rgba(239, 68, 68, .4); }
.feature-icon {
  width: 56px; height: 56px; border-radius: 16px; background: var(--primary-soft);
  display: flex; align-items: center; justify-content: center; font-size: 26px; margin-bottom: 16px;
}
.feature-card h4 { font-size: 17px; margin-bottom: 8px; }
.feature-card p { color: var(--muted); font-size: 13.5px; }

/* ===== 数据统计区 ===== */
.stats-strip {
  background: var(--grad); border-radius: 24px; padding: 44px 24px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center;
  box-shadow: 0 20px 50px rgba(239, 68, 68, .35);
}
.stats-strip .num { font-size: 36px; font-weight: 800; color: #fff; font-variant-numeric: tabular-nums; }
.stats-strip .label { color: rgba(255, 255, 255, .85); font-size: 14px; margin-top: 4px; }

/* ===== 用户评价 ===== */
.testimonial-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.t-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px 20px;
  display: flex; flex-direction: column; gap: 12px; transition: .25s;
}
.t-card:hover { border-color: rgba(239, 68, 68, .4); }
.t-stars { color: #fbbf24; font-size: 15px; letter-spacing: 2px; }
.t-text { color: #cdd5e0; font-size: 14px; flex: 1; }
.t-user { display: flex; align-items: center; gap: 10px; }
.t-user img { width: 38px; height: 38px; border-radius: 50%; }
.t-user span { font-size: 13px; color: var(--muted); }

/* ===== 成功故事 ===== */
.story-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.story-card {
  position: relative; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px 22px; overflow: hidden; transition: .25s;
}
.story-card:hover { transform: translateY(-5px); border-color: rgba(239, 68, 68, .4); }
.story-card .s-num { position: absolute; right: 14px; top: 8px; font-size: 52px; font-weight: 800; color: rgba(239, 68, 68, .12); }
.story-card h4 { font-size: 17px; margin-bottom: 10px; color: #fff; }
.story-card p { color: var(--muted); font-size: 14px; }

/* ===== APP 展示区 ===== */
.app-section { background: var(--bg-2); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.app-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; padding: 72px 0; }
.app-copy h2 { font-size: 32px; margin-bottom: 12px; }
.app-copy > p { color: var(--muted); margin-bottom: 28px; }
.app-points { display: flex; flex-direction: column; gap: 18px; }
.app-point { display: flex; gap: 14px; }
.app-point .ic {
  flex: none; width: 46px; height: 46px; border-radius: 14px; background: var(--primary-soft);
  display: flex; align-items: center; justify-content: center; font-size: 21px;
}
.app-point h4 { font-size: 15px; }
.app-point p { color: var(--muted); font-size: 13px; margin-top: 2px; }
.phone-wrap { display: flex; justify-content: center; }
.phone {
  position: relative; width: 264px; height: 540px; border-radius: 38px;
  background: #000; border: 2px solid var(--border-2); overflow: hidden;
  box-shadow: 0 30px 70px rgba(0, 0, 0, .6), inset 0 0 0 6px #0d1015;
}
.phone-notch {
  position: absolute; top: 10px; left: 50%; transform: translateX(-50%);
  width: 110px; height: 22px; background: #000; border-radius: 0 0 14px 14px; z-index: 3;
}
.phone img { width: 100%; height: 100%; object-fit: cover; }
.phone-bar {
  position: absolute; bottom: 8px; left: 50%; transform: translateX(-50%);
  width: 96px; height: 4px; border-radius: 99px; background: rgba(255, 255, 255, .6); z-index: 3;
}

/* ===== 页脚 ===== */
.footer { background: #0a0c10; border-top: 1px solid var(--border); padding: 52px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; padding-bottom: 36px; }
.footer-brand p { color: var(--muted); font-size: 13.5px; margin-top: 12px; max-width: 300px; }
.footer-col h4 { font-size: 15px; margin-bottom: 14px; }
.footer-col a { display: block; color: var(--muted); font-size: 13.5px; padding: 4px 0; transition: .2s; }
.footer-col a:hover { color: var(--primary-2); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 20px; text-align: center; color: #66707e; font-size: 13px; }

/* ===== 内页头部 ===== */
.page-hero {
  padding: 72px 0 56px; text-align: center;
  background:
    radial-gradient(800px 360px at 50% -20%, rgba(239, 68, 68, .3), transparent 65%),
    linear-gradient(180deg, #10141b, #0d1015);
}
.page-hero h1 { font-size: 34px; margin-bottom: 10px; }
.page-hero p { color: var(--muted); }

/* ===== 精选页筛选 ===== */
.filter-bar { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 32px; }
.filter-bar button {
  background: var(--surface); border: 1px solid var(--border-2); color: var(--muted);
  padding: 8px 22px; border-radius: 999px; font-size: 14px; cursor: pointer; transition: .2s; font-family: inherit;
}
.filter-bar button:hover { color: var(--text); }
.filter-bar button.active {
  background: var(--grad); color: #fff; border-color: transparent;
  box-shadow: 0 6px 16px rgba(239, 68, 68, .35);
}

/* ===== 关于页 ===== */
.about-body { max-width: 820px; margin: 0 auto; }
.about-body p { color: #c4ccd8; margin-bottom: 16px; font-size: 15px; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 32px; }
.value-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 26px 22px; transition: .25s;
}
.value-card:hover { transform: translateY(-5px); border-color: rgba(239, 68, 68, .4); }
.value-card h4 { font-size: 17px; margin-bottom: 8px; }
.value-card p { color: var(--muted); font-size: 13.5px; margin-bottom: 0; }
.cta-banner { background: var(--grad); border-radius: 24px; padding: 44px 24px; text-align: center; box-shadow: 0 20px 50px rgba(239, 68, 68, .3); }
.cta-banner h3 { font-size: 26px; color: #fff; }
.cta-banner p { color: rgba(255, 255, 255, .85); margin: 8px 0 24px; }
.cta-banner .btn-dark { background: #0d1015; color: #fff; border: none; }

/* ===== 轻提示 ===== */
.toast {
  position: fixed; left: 50%; bottom: 36px; z-index: 999;
  transform: translateX(-50%) translateY(20px);
  background: var(--surface-2); border: 1px solid rgba(239, 68, 68, .5);
  color: var(--text); padding: 12px 22px; border-radius: 999px; font-size: 14px;
  opacity: 0; pointer-events: none; transition: .3s;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .creator-grid { grid-template-columns: repeat(3, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-strip { grid-template-columns: repeat(2, 1fr); }
  .story-grid { grid-template-columns: 1fr 1fr; }
  .app-wrap { grid-template-columns: 1fr; padding: 56px 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero { padding: 56px 0 48px; }
  .hero h1 { font-size: 30px; }
  .video-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .creator-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .story-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .stats-strip { grid-template-columns: 1fr 1fr; }
  .hero-stats { gap: 24px; }
  .hero-stats .num { font-size: 22px; }
  .footer-grid { grid-template-columns: 1fr; }
  .search-box { padding-left: 16px; }
  .section { padding: 44px 0; }
  .section-head h2 { font-size: 24px; }
  .app-copy h2 { font-size: 24px; }
  .page-hero h1 { font-size: 26px; }
}