/* ============================================================
   黑料官网 · 瓜田星球设计系统
   深空宇宙 × 西瓜三色（瓜瓤粉 / 蜜瓜橙 / 瓜皮绿）
   Modern · Cute · Premium
   ============================================================ */

:root {
  /* 色彩令牌 */
  --bg: #0a0c16;
  --bg-soft: #10131f;
  --card: #151a2c;
  --card-2: #1b2138;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --txt: #f3f5fb;
  --muted: #9aa3b8;
  --muted-2: #6b7489;

  --pink: #ff5470;
  --pink-soft: #ff8fa3;
  --orange: #ffa94d;
  --green: #37e2a0;
  --green-deep: #1fb97f;
  --violet: #8b7cf6;

  --grad-main: linear-gradient(135deg, var(--pink) 0%, var(--orange) 100%);
  --grad-cool: linear-gradient(135deg, var(--violet) 0%, var(--pink) 100%);
  --grad-fresh: linear-gradient(135deg, var(--green) 0%, #4fd1ff 100%);

  /* 字体 */
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;

  /* 形状与阴影 */
  --radius: 20px;
  --radius-sm: 14px;
  --radius-lg: 28px;
  --shadow-card: 0 18px 48px rgba(0, 0, 0, 0.38);
  --shadow-pop: 0 24px 80px rgba(0, 0, 0, 0.55);
  --glow-pink: 0 0 42px rgba(255, 84, 112, 0.35);
  --glow-orange: 0 0 42px rgba(255, 169, 77, 0.3);
  --glow-green: 0 0 42px rgba(55, 226, 160, 0.3);

  /* 布局 */
  --container: 1200px;
  --nav-h: 72px;
}

/* ---------- Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--txt);
  line-height: 1.65;
  overflow-x: clip;
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; }

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

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-soft); }
::-webkit-scrollbar-thumb { background: #2a3050; border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: #3a4370; }

/* ---------- 背景装饰（星空 / 光晕） ---------- */
.bg-stage { position: fixed; inset: 0; z-index: -1; overflow: hidden; background: var(--bg); }
.bg-stage::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(900px 480px at 12% -6%, rgba(255, 84, 112, 0.16), transparent 60%),
    radial-gradient(760px 420px at 88% 4%, rgba(139, 124, 246, 0.14), transparent 60%),
    radial-gradient(820px 460px at 50% 108%, rgba(55, 226, 160, 0.10), transparent 60%);
}
.star { position: absolute; border-radius: 50%; background: #fff; opacity: 0.5; animation: twinkle 3.4s ease-in-out infinite; }

/* ---------- 布局容器 ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 clamp(18px, 4vw, 32px); }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: rgba(10, 12, 22, 0.72);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s, box-shadow 0.3s;
}
.nav.scrolled {
  border-bottom-color: var(--line);
  background: rgba(10, 12, 22, 0.9);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}
.nav-inner { display: flex; align-items: center; gap: 26px; height: 100%; }
.brand { display: flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-name { font-size: 20px; font-weight: 800; letter-spacing: -0.02em; }
.brand-name em { font-style: normal; color: var(--pink); }
.brand-tag {
  font-size: 11px; font-weight: 600; color: #fff;
  background: var(--grad-main); border-radius: 999px; padding: 3px 10px;
  letter-spacing: 0.04em; transform: translateY(-1px);
}
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links a {
  position: relative; padding: 9px 15px; border-radius: 999px;
  font-size: 15px; font-weight: 500; color: var(--muted);
  transition: color 0.25s, background 0.25s;
}
.nav-links a:hover { color: var(--txt); background: rgba(255, 255, 255, 0.06); }
.nav-links a.active { color: var(--txt); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 50%; bottom: 1px; transform: translateX(-50%);
  width: 18px; height: 3px; border-radius: 3px; background: var(--grad-main);
}
.nav-cta { display: flex; align-items: center; gap: 12px; margin-left: 8px; }
.nav-burger {
  display: none; width: 42px; height: 42px; border-radius: 12px;
  background: rgba(255, 255, 255, 0.06); align-items: center; justify-content: center;
  flex-direction: column; gap: 5px;
}
.nav-burger span { display: block; width: 20px; height: 2px; border-radius: 2px; background: var(--txt); transition: transform 0.3s, opacity 0.3s; }
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端抽屉菜单 */
.mobile-menu {
  display: none; position: fixed; inset: var(--nav-h) 0 0 0; z-index: 99;
  background: rgba(10, 12, 22, 0.97); backdrop-filter: blur(20px);
  padding: 28px clamp(18px, 5vw, 40px);
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 17px 6px; font-size: 18px; font-weight: 600; color: var(--txt);
  border-bottom: 1px solid var(--line);
}
.mobile-menu a.active { color: var(--pink); }
.mobile-menu .mm-cta { margin-top: 26px; text-align: center; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 26px; border-radius: 999px;
  font-size: 15px; font-weight: 700; letter-spacing: 0.01em;
  transition: transform 0.22s, box-shadow 0.22s, filter 0.22s;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--grad-main); color: #fff; box-shadow: var(--glow-pink); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 40px rgba(255, 84, 112, 0.45); }
.btn-cool { background: var(--grad-cool); color: #fff; box-shadow: 0 10px 30px rgba(139, 124, 246, 0.35); }
.btn-cool:hover { transform: translateY(-2px); }
.btn-ghost { background: rgba(255, 255, 255, 0.07); color: var(--txt); border: 1px solid var(--line-strong); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.12); transform: translateY(-2px); }
.btn-lg { padding: 17px 38px; font-size: 17px; }
.btn-sm { padding: 9px 18px; font-size: 13.5px; }
.btn .icon { font-size: 1.2em; line-height: 1; }

/* ---------- 区块头 ---------- */
.section { padding: 84px 0; position: relative; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; margin-bottom: 34px; flex-wrap: wrap; }
.section-kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12.5px; font-weight: 700; letter-spacing: 0.14em;
  color: #ffc078; text-transform: uppercase; margin-bottom: 12px;
}
.section-kicker::before { content: ""; width: 26px; height: 2px; border-radius: 2px; background: var(--grad-main); }
.section-title { font-size: clamp(27px, 4.2vw, 42px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.2; }
.section-sub { color: var(--muted); font-size: 15.5px; margin-top: 10px; max-width: 560px; }
.section-more { font-size: 14.5px; font-weight: 600; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; transition: color 0.25s, gap 0.25s; }
.section-more:hover { color: var(--pink); gap: 11px; }

/* 渐变标题强调（渐进增强：不支持 text-clip 时回退纯色） */
.grad-text { color: var(--pink); }
.grad-text-cool { color: var(--violet); }
.grad-text-fresh { color: var(--green); }
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .grad-text {
    background: var(--grad-main);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
  }
  .grad-text-cool {
    background: var(--grad-cool);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
  }
  .grad-text-fresh {
    background: var(--grad-fresh);
    -webkit-background-clip: text; background-clip: text;
    -webkit-text-fill-color: transparent; color: transparent;
  }
}

/* 徽章 / 标签 */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12.5px; font-weight: 700; padding: 5px 13px; border-radius: 999px;
  background: rgba(255, 84, 112, 0.16); color: #ff8fa3; border: 1px solid rgba(255, 84, 112, 0.32);
}
.badge-orange { background: rgba(255, 169, 77, 0.16); color: #ffc078; border-color: rgba(255, 169, 77, 0.34); }
.badge-green { background: rgba(55, 226, 160, 0.15); color: #5cf0b8; border-color: rgba(55, 226, 160, 0.34); }
.badge-violet { background: rgba(139, 124, 246, 0.17); color: #c3b8ff; border-color: rgba(139, 124, 246, 0.36); }
.badge-plain { background: rgba(255, 255, 255, 0.08); color: var(--muted); border-color: var(--line); }

/* ---------- Hero ---------- */
.hero { position: relative; padding: clamp(64px, 10vw, 128px) 0 90px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: center; }
.hero-title { font-size: clamp(40px, 6.2vw, 74px); font-weight: 900; line-height: 1.08; letter-spacing: -0.03em; }
.hero-desc { font-size: clamp(16px, 2vw, 19px); color: var(--muted); margin: 24px 0 34px; max-width: 520px; overflow-wrap: break-word; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-meta { display: flex; gap: 26px; margin-top: 40px; flex-wrap: wrap; }
.hero-meta-item b { display: block; font-size: 24px; font-weight: 800; }
.hero-meta-item span { font-size: 13px; color: var(--muted); }

/* Hero 右侧：热榜迷你卡 */
.hero-visual { position: relative; }
.hero-card {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--line-strong); border-radius: var(--radius-lg);
  padding: 26px 24px 22px; box-shadow: var(--shadow-card);
  backdrop-filter: blur(8px);
}
.hero-card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.hero-card-head h3 { font-size: 17px; font-weight: 800; display: flex; align-items: center; gap: 8px; }
.live-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(55, 226, 160, 0.18); animation: pulse 1.8s infinite; }
.hero-rank { display: flex; align-items: center; gap: 14px; padding: 13px 12px; border-radius: var(--radius-sm); transition: background 0.25s; }
.hero-rank:hover { background: rgba(255, 255, 255, 0.05); }
.hero-rank .no { font-size: 15px; font-weight: 800; color: var(--muted-2); width: 26px; text-align: center; font-style: italic; }
.hero-rank:nth-child(-n+3) .no { color: var(--orange); }
.hero-rank .txt { flex: 1; font-size: 14.5px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hero-rank .heat { font-size: 12px; color: var(--muted-2); display: flex; align-items: center; gap: 4px; }
.heat-up { color: var(--pink); }
.heat-down { color: var(--green); }
.floating-emoji { position: absolute; font-size: 30px; animation: floaty 5s ease-in-out infinite; filter: drop-shadow(0 8px 18px rgba(0,0,0,0.4)); z-index: 2; }

/* ---------- 筛选 Chips ---------- */
.chips { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 28px; }
.chip {
  padding: 9px 20px; border-radius: 999px; font-size: 14px; font-weight: 600;
  color: var(--muted); background: rgba(255, 255, 255, 0.05); border: 1px solid var(--line);
  transition: all 0.22s;
}
.chip:hover { color: var(--txt); border-color: var(--line-strong); }
.chip.active { background: var(--grad-main); color: #fff; border-color: transparent; box-shadow: var(--glow-pink); }

/* ---------- 卡片通用 ---------- */
.card {
  background: linear-gradient(165deg, var(--card) 0%, #12162a 100%);
  border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.card:hover { transform: translateY(-6px); border-color: var(--line-strong); box-shadow: var(--shadow-card); }

/* 爆料卡（吃瓜卡） */
.news-card { padding: 0; display: flex; flex-direction: column; }
.news-card .cover { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.news-card .cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.45s; }
.news-card:hover .cover img { transform: scale(1.06); }
.news-card .cat { position: absolute; left: 14px; top: 14px; }
.news-card .body { padding: 20px 20px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.news-card h3 { font-size: 17.5px; font-weight: 700; line-height: 1.42; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card p { font-size: 14px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-card .foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; font-size: 12.5px; color: var(--muted-2); }
.hot-fire { color: var(--orange); }

/* 视频卡 */
.video-card { position: relative; cursor: pointer; }
.video-card .cover { position: relative; aspect-ratio: 9 / 13; overflow: hidden; }
.video-card .cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.45s; }
.video-card:hover .cover img { transform: scale(1.07); }
.video-card .dur {
  position: absolute; right: 10px; bottom: 10px; font-size: 11.5px; font-weight: 700;
  background: rgba(0, 0, 0, 0.72); color: #fff; padding: 3px 9px; border-radius: 8px;
}
.video-card .play-badge {
  position: absolute; inset: 0; display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: opacity 0.3s;
}
.video-card:hover .play-badge { opacity: 1; }
.play-btn {
  width: 56px; height: 56px; border-radius: 50%;
  background: rgba(255, 84, 112, 0.92); color: #fff; font-size: 20px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 0 10px rgba(255, 84, 112, 0.22); backdrop-filter: blur(4px);
  transition: transform 0.25s;
}
.play-btn:hover { transform: scale(1.12); }
.video-card .info { padding: 14px 4px 6px; }
.video-card .info h3 { font-size: 14.5px; font-weight: 600; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.video-card .info .meta { margin-top: 8px; display: flex; gap: 12px; font-size: 12px; color: var(--muted-2); }

/* 话题标签 */
.tag-line { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  font-size: 12.5px; font-weight: 600; color: var(--muted);
  background: rgba(255, 255, 255, 0.06); border: 1px solid var(--line);
  padding: 5px 13px; border-radius: 999px; transition: all 0.22s;
}
.tag:hover { color: var(--pink); border-color: rgba(255, 84, 112, 0.4); }

/* ---------- 网格 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

/* 横向滚动（移动端友好） */
.h-scroll { display: flex; gap: 20px; overflow-x: auto; scroll-snap-type: x mandatory; padding: 4px 4px 18px; }
.h-scroll > * { flex: 0 0 auto; scroll-snap-align: start; }
.h-scroll::-webkit-scrollbar { height: 6px; }
.h-scroll::-webkit-scrollbar-thumb { background: #2a3050; border-radius: 8px; }

/* ---------- 完整榜单 ---------- */
.rank-list { display: flex; flex-direction: column; }
.rank-row {
  display: flex; align-items: center; gap: 18px;
  padding: 18px 18px; border-radius: var(--radius-sm);
  border-bottom: 1px solid var(--line); transition: background 0.25s;
}
.rank-row:last-child { border-bottom: none; }
.rank-row:hover { background: rgba(255, 255, 255, 0.04); }
.rank-no {
  font-size: 22px; font-weight: 900; font-style: italic; width: 52px; text-align: center;
  color: var(--muted-2); letter-spacing: -0.02em;
}
.rank-row:nth-child(1) .rank-no { color: var(--pink); text-shadow: var(--glow-pink); }
.rank-row:nth-child(2) .rank-no { color: var(--orange); text-shadow: var(--glow-orange); }
.rank-row:nth-child(3) .rank-no { color: var(--green); text-shadow: var(--glow-green); }
.rank-main { flex: 1; min-width: 0; }
.rank-title { font-size: 16px; font-weight: 650; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rank-sub { font-size: 12.5px; color: var(--muted-2); margin-top: 3px; }
.rank-heat { width: 150px; }
.heat-bar { height: 6px; border-radius: 6px; background: rgba(255, 255, 255, 0.08); overflow: hidden; }
.heat-bar i { display: block; height: 100%; border-radius: 6px; background: var(--grad-main); }
.heat-num { font-size: 12px; color: var(--muted-2); margin-top: 6px; }
.rank-trend { width: 76px; text-align: right; font-size: 12.5px; font-weight: 700; display: flex; align-items: center; gap: 5px; justify-content: flex-end; }
.trend-up { color: var(--pink); }
.trend-down { color: var(--green); }
.trend-flat { color: var(--muted-2); }

/* ---------- 文章列表 ---------- */
.post-row {
  display: grid; grid-template-columns: 320px 1fr; gap: 26px;
  padding: 24px; border-radius: var(--radius);
  background: linear-gradient(165deg, var(--card) 0%, #12162a 100%);
  border: 1px solid var(--line); transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.post-row:hover { transform: translateY(-4px); border-color: var(--line-strong); box-shadow: var(--shadow-card); }
.post-row .cover { aspect-ratio: 16 / 9; border-radius: var(--radius-sm); overflow: hidden; }
.post-row .cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.45s; }
.post-row:hover .cover img { transform: scale(1.05); }
.post-body { display: flex; flex-direction: column; gap: 10px; justify-content: center; }
.post-body h3 { font-size: clamp(18px, 2.4vw, 23px); font-weight: 750; line-height: 1.4; }
.post-body p { font-size: 14.5px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-meta { display: flex; gap: 16px; font-size: 12.5px; color: var(--muted-2); align-items: center; flex-wrap: wrap; }

/* 分页 */
.pager { display: flex; gap: 8px; justify-content: center; margin-top: 44px; flex-wrap: wrap; }
.pager button {
  min-width: 42px; height: 42px; border-radius: 12px; font-weight: 700; font-size: 14px;
  color: var(--muted); background: rgba(255, 255, 255, 0.05); border: 1px solid var(--line);
  transition: all 0.22s;
}
.pager button:hover { color: var(--txt); border-color: var(--line-strong); }
.pager button.active { background: var(--grad-main); color: #fff; border-color: transparent; box-shadow: var(--glow-pink); }

/* ---------- 弹窗 ---------- */
.modal {
  position: fixed; inset: 0; z-index: 200;
  display: none; align-items: center; justify-content: center; padding: 20px;
  background: rgba(5, 6, 12, 0.78); backdrop-filter: blur(14px);
}
.modal.open { display: flex; }
.modal-panel {
  width: 100%; max-width: 560px;
  background: linear-gradient(170deg, var(--card-2) 0%, var(--card) 100%);
  border: 1px solid var(--line-strong); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-pop); overflow: hidden;
  animation: pop-in 0.32s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.modal-cover { position: relative; aspect-ratio: 16 / 9; }
.modal-cover img { width: 100%; height: 100%; object-fit: cover; }
.modal-close {
  position: absolute; top: 14px; right: 14px; width: 38px; height: 38px;
  border-radius: 50%; background: rgba(0, 0, 0, 0.55); color: #fff; font-size: 17px;
  display: flex; align-items: center; justify-content: center; transition: background 0.2s, transform 0.2s;
}
.modal-close:hover { background: var(--pink); transform: rotate(90deg); }
.modal-body { padding: 26px; }
.modal-body h3 { font-size: 21px; font-weight: 800; line-height: 1.4; margin-bottom: 10px; }
.modal-body p { color: var(--muted); font-size: 14.5px; }
.modal-actions { display: flex; gap: 12px; margin-top: 22px; flex-wrap: wrap; }

/* ---------- 下载页 ---------- */
.download-hero { text-align: center; padding: clamp(70px, 9vw, 110px) 0 60px; }
.download-hero .app-logo { width: 92px; height: 92px; margin: 0 auto 24px; border-radius: 24px; background: var(--grad-main); display: flex; align-items: center; justify-content: center; font-size: 44px; box-shadow: var(--glow-pink); }
.dl-card {
  background: linear-gradient(165deg, var(--card) 0%, #12162a 100%);
  border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: clamp(26px, 4vw, 42px); text-align: center;
}
.qr-box { width: 176px; height: 176px; margin: 0 auto 18px; border-radius: var(--radius); background: #fff; padding: 12px; }
.qr-box img { width: 100%; height: 100%; }
.feature-card { text-align: left; padding: 26px 24px; }
.feature-card .f-icon { width: 52px; height: 52px; border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 26px; margin-bottom: 16px; }
.faq-item { border: 1px solid var(--line); border-radius: var(--radius-sm); margin-bottom: 14px; overflow: hidden; background: rgba(255, 255, 255, 0.02); }
.faq-item summary { padding: 18px 22px; font-weight: 650; font-size: 15.5px; cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 22px; color: var(--pink); transition: transform 0.25s; }
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-a { padding: 0 22px 20px; color: var(--muted); font-size: 14.5px; }

/* ---------- 无 JS 兜底 ---------- */
.no-js-hint { display: none; }
html.no-js .no-js-hint { display: block; }
html.no-js [data-reveal] { opacity: 1 !important; transform: none !important; }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); background: rgba(8, 9, 16, 0.6); padding: 66px 0 30px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.footer h4 { font-size: 15px; font-weight: 700; margin-bottom: 16px; }
.footer a { display: block; padding: 5px 0; font-size: 14px; color: var(--muted); transition: color 0.2s, transform 0.2s; }
.footer a:hover { color: var(--pink); transform: translateX(3px); }
.footer .f-desc { color: var(--muted); font-size: 14px; margin-top: 14px; max-width: 300px; }
.footer-bottom { margin-top: 46px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted-2); }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--grad-main); color: #fff; font-size: 19px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--glow-pink); opacity: 0; pointer-events: none;
  transform: translateY(14px); transition: opacity 0.3s, transform 0.3s;
}
.to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }

/* ---------- 动画 ---------- */
[data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
[data-reveal].revealed { opacity: 1; transform: none; }
[data-reveal][data-reveal-delay="1"] { transition-delay: 0.08s; }
[data-reveal][data-reveal-delay="2"] { transition-delay: 0.16s; }
[data-reveal][data-reveal-delay="3"] { transition-delay: 0.24s; }
[data-reveal][data-reveal-delay="4"] { transition-delay: 0.32s; }

@keyframes twinkle { 0%, 100% { opacity: 0.18; } 50% { opacity: 0.75; } }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 4px rgba(55, 226, 160, 0.18); } 50% { box-shadow: 0 0 0 8px rgba(55, 226, 160, 0.06); } }
@keyframes floaty { 0%, 100% { transform: translateY(0) rotate(0deg); } 50% { transform: translateY(-16px) rotate(6deg); } }
@keyframes pop-in { from { opacity: 0; transform: scale(0.9) translateY(12px); } to { opacity: 1; transform: none; } }

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
  .hero-grid { grid-template-columns: 1fr; gap: 46px; }
  .hero-visual { max-width: 620px; }
}

@media (max-width: 768px) {
  :root { --nav-h: 64px; }
  .section { padding: 60px 0; }
  .nav-links, .nav-cta .btn-primary { display: none; }
  .nav-burger { display: flex; }
  .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .grid-2 { grid-template-columns: 1fr; }
  .post-row { grid-template-columns: 1fr; gap: 16px; }
  .rank-heat { width: 90px; }
  .rank-trend { display: none; }
  .hero-meta { gap: 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
}

@media (max-width: 480px) {
  .grid-4, .grid-3 { grid-template-columns: 1fr; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn { width: 100%; }
  .brand-tag { display: none; }
  .h-scroll > * { width: 78%; }
}