/* ============================================================
   17c 官网入口 · 全站设计系统
   视觉概念：霓虹夜幕 × 活力渐变（现代 / 可爱大气 / 专业）
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* 色彩 */
  --bg-0: #070812;
  --bg-1: #0d0f1f;
  --bg-2: #141732;
  --surface: rgba(255, 255, 255, 0.055);
  --surface-strong: rgba(255, 255, 255, 0.09);
  --stroke: rgba(255, 255, 255, 0.1);
  --stroke-soft: rgba(255, 255, 255, 0.07);

  --text-1: #f5f6ff;
  --text-2: #b8bbe0;
  --text-3: #8488b0;

  --brand-a: #8b5cff;
  --brand-b: #ff5f9e;
  --brand-c: #ffb35c;
  --aqua: #3dd8ff;

  --grad-brand: linear-gradient(120deg, #8b5cff 0%, #ff5f9e 52%, #ffb35c 100%);
  --grad-aqua: linear-gradient(120deg, #3dd8ff, #8b5cff);

  /* 形状与阴影 */
  --radius-s: 12px;
  --radius-m: 18px;
  --radius-l: 26px;
  --shadow-1: 0 8px 28px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 14px 44px rgba(139, 92, 255, 0.28);
  --glass: blur(18px) saturate(140%);

  /* 排版 */
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
  --container: 1200px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background:
    radial-gradient(1100px 620px at 85% -10%, rgba(139, 92, 255, 0.16), transparent 60%),
    radial-gradient(900px 520px at -10% 12%, rgba(255, 95, 158, 0.10), transparent 55%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 45%, #0a0c1a 100%);
  background-attachment: fixed;
  color: var(--text-1);
  line-height: 1.6;
  min-height: 100vh;
  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; color: inherit; }

::selection { background: rgba(139, 92, 255, 0.45); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: linear-gradient(var(--brand-a), var(--brand-b)); border-radius: 8px; }
::-webkit-scrollbar-track { background: var(--bg-0); }

/* ---------- 通用工具类 ---------- */
.container { width: min(var(--container), 100% - 40px); margin-inline: auto; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 200;
  background: var(--grad-brand); color: #fff; font-weight: 700;
  padding: 10px 18px; border-radius: 999px; transition: top 0.25s;
}
.skip-link:focus { top: 14px; }

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 999px;
  font-size: 12.5px; font-weight: 600; letter-spacing: 0.5px;
  background: var(--surface); border: 1px solid var(--stroke);
  color: var(--text-2);
}
.badge--hot { color: #ffd9a8; border-color: rgba(255, 179, 92, 0.35); background: rgba(255, 179, 92, 0.12); }
.badge--live { color: #b9f3ff; border-color: rgba(61, 216, 255, 0.35); background: rgba(61, 216, 255, 0.12); }
.badge--grad { background: var(--grad-brand); color: #fff; border: none; }

.gradient-text {
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

.section { padding: 76px 0 20px; }
.section-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 16px; margin-bottom: 30px; flex-wrap: wrap;
}
.section-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: 3px; text-transform: uppercase;
  color: var(--brand-c); margin-bottom: 10px;
}
.section-eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--grad-brand); border-radius: 2px; }
.section-title { font-size: clamp(26px, 4vw, 38px); line-height: 1.25; font-weight: 800; letter-spacing: 0.5px; }
.section-desc { color: var(--text-2); margin-top: 10px; max-width: 640px; font-size: 15px; }
.section-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 14.5px; color: var(--aqua);
  padding: 10px 18px; border-radius: 999px;
  background: rgba(61, 216, 255, 0.08); border: 1px solid rgba(61, 216, 255, 0.25);
  transition: all 0.25s;
}
.section-link:hover { background: rgba(61, 216, 255, 0.18); transform: translateX(4px); }

/* 焦点态（可访问性） */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--aqua); outline-offset: 3px; border-radius: 6px;
}

/* ============================================================
   顶部导航
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: var(--glass); -webkit-backdrop-filter: var(--glass);
  background: rgba(7, 8, 18, 0.72);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s, background 0.3s;
}
.site-header.is-scrolled {
  background: rgba(7, 8, 18, 0.92);
  border-bottom-color: var(--stroke);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}
.nav-inner { display: flex; align-items: center; gap: 28px; height: 68px; }

.logo { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 19px; letter-spacing: 0.3px; }
.logo-mark {
  width: 38px; height: 38px; border-radius: 12px;
  background: var(--grad-brand);
  display: grid; place-items: center;
  font-size: 19px; color: #fff;
  box-shadow: var(--shadow-glow);
}
.logo b { background: var(--grad-brand); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

.nav-links { display: flex; gap: 6px; margin-left: auto; }
.nav-links a {
  position: relative; padding: 9px 15px; border-radius: 999px;
  font-size: 15px; font-weight: 600; color: var(--text-2);
  transition: color 0.25s, background 0.25s;
}
.nav-links a:hover { color: var(--text-1); background: var(--surface); }
.nav-links a[aria-current="page"] { color: #fff; background: rgba(139, 92, 255, 0.22); }
.nav-links a[aria-current="page"]::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; transform: translateX(-50%);
  width: 18px; height: 3px; border-radius: 3px; background: var(--grad-brand);
}

.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--grad-brand); color: #fff; font-weight: 700; font-size: 14.5px;
  padding: 10px 20px; border-radius: 999px;
  box-shadow: 0 8px 22px rgba(255, 95, 158, 0.35);
  transition: transform 0.25s, box-shadow 0.25s;
  white-space: nowrap;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(255, 95, 158, 0.5); }

.menu-toggle {
  display: none; width: 44px; height: 44px; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--stroke);
  place-items: center; font-size: 20px;
}
.mobile-menu {
  display: none; flex-direction: column; gap: 6px;
  padding: 14px 20px 22px;
  border-bottom: 1px solid var(--stroke);
  background: rgba(10, 12, 26, 0.98);
}
.mobile-menu.open { display: flex; }
.mobile-menu a { padding: 13px 16px; border-radius: 14px; font-weight: 600; color: var(--text-2); background: var(--surface); }
.mobile-menu a[aria-current="page"] { color: #fff; background: rgba(139, 92, 255, 0.25); }
.mobile-menu .nav-cta { justify-content: center; margin-top: 8px; }

/* ============================================================
   首页英雄区
   ============================================================ */
.hero {
  position: relative; overflow: hidden;
  padding: 90px 0 70px;
}
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(70px); pointer-events: none;
}
.hero::before { width: 480px; height: 480px; top: -140px; right: -120px; background: rgba(139, 92, 255, 0.35); }
.hero::after { width: 380px; height: 380px; bottom: -120px; left: -100px; background: rgba(255, 95, 158, 0.22); }

.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.15fr 0.85fr;
  align-items: center; gap: 48px;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 14px; border-radius: 999px;
  background: rgba(61, 216, 255, 0.1); border: 1px solid rgba(61, 216, 255, 0.3);
  color: var(--aqua); font-size: 13px; font-weight: 700; letter-spacing: 0.5px;
  margin-bottom: 22px;
}
.hero-tag .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--aqua); animation: pulse 1.8s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(61, 216, 255, 0.6); } 50% { opacity: 0.6; box-shadow: 0 0 0 7px rgba(61, 216, 255, 0); } }

.hero h1 { font-size: clamp(38px, 6vw, 60px); line-height: 1.12; font-weight: 900; letter-spacing: 1px; }
.hero-sub { margin-top: 20px; color: var(--text-2); font-size: 16.5px; max-width: 560px; }

.hero-cta { display: flex; gap: 14px; margin-top: 34px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 28px; border-radius: 999px;
  font-size: 15.5px; font-weight: 700; transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
}
.btn--primary { background: var(--grad-brand); color: #fff; box-shadow: 0 12px 32px rgba(255, 95, 158, 0.4); }
.btn--primary:hover { transform: translateY(-3px); box-shadow: 0 16px 40px rgba(255, 95, 158, 0.55); }
.btn--ghost { background: var(--surface); border: 1.5px solid var(--stroke); color: var(--text-1); backdrop-filter: var(--glass); }
.btn--ghost:hover { border-color: var(--aqua); color: var(--aqua); transform: translateY(-3px); }
.btn--lg { padding: 16px 34px; font-size: 16.5px; }

.hero-stats { display: flex; gap: 36px; margin-top: 44px; flex-wrap: wrap; }
.hstat .num { font-size: 30px; font-weight: 900; letter-spacing: 0.5px; }
.hstat .lbl { color: var(--text-3); font-size: 13px; margin-top: 2px; }

/* 手机壳 mockup */
.hero-phone { display: flex; justify-content: center; }
.phone {
  position: relative; width: 280px; border-radius: 42px; padding: 12px;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.16), rgba(255, 255, 255, 0.03));
  border: 1.5px solid var(--stroke);
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transform: rotate(3deg); animation: floaty 5s ease-in-out infinite;
}
@keyframes floaty { 0%, 100% { transform: rotate(3deg) translateY(0); } 50% { transform: rotate(3deg) translateY(-12px); } }
.phone-screen {
  border-radius: 32px; overflow: hidden; background: var(--bg-1);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.phone-appbar { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px 10px; }
.phone-appbar .logo-mark { width: 30px; height: 30px; font-size: 15px; border-radius: 9px; }
.phone-appbar span { font-size: 12px; font-weight: 800; }
.phone-appbar i { font-style: normal; font-size: 14px; color: var(--text-3); }
.phone-feeds { display: grid; gap: 10px; padding: 4px 14px 16px; }
.phone-item {
  background: var(--surface); border: 1px solid var(--stroke-soft);
  border-radius: 14px; padding: 11px 12px;
  display: grid; grid-template-columns: 42px 1fr; gap: 10px; align-items: center;
}
.phone-thumb { aspect-ratio: 1; border-radius: 10px; background: var(--grad-brand); opacity: 0.9; }
.phone-thumb.t2 { background: var(--grad-aqua); }
.phone-thumb.t3 { background: linear-gradient(120deg, #ffb35c, #ff5f9e); }
.phone-item p { font-size: 11px; font-weight: 600; line-height: 1.4; }
.phone-item small { color: var(--text-3); font-size: 10px; }
.phone-item .bar { height: 5px; border-radius: 3px; background: rgba(255, 255, 255, 0.14); margin-top: 6px; width: 70%; }

.hero-scroll-hint {
  position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
  color: var(--text-3); font-size: 12px; letter-spacing: 2px;
  animation: bob 2s infinite;
}
@keyframes bob { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(6px); } }

/* ============================================================
   Chips 筛选
   ============================================================ */
.chip-row { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 30px; }
.chip {
  padding: 9px 18px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--stroke);
  color: var(--text-2); font-size: 14px; font-weight: 600;
  transition: all 0.25s;
}
.chip:hover { color: var(--text-1); border-color: rgba(139, 92, 255, 0.6); }
.chip.active {
  background: var(--grad-brand); color: #fff; border-color: transparent;
  box-shadow: 0 6px 18px rgba(255, 95, 158, 0.35);
}

/* ============================================================
   榜单
   ============================================================ */
.rank-list { display: grid; gap: 12px; }
.rank-item {
  display: grid; grid-template-columns: 52px 1fr auto; gap: 16px; align-items: center;
  padding: 16px 20px; border-radius: var(--radius-m);
  background: var(--surface); border: 1px solid var(--stroke-soft);
  transition: transform 0.25s, border-color 0.25s, background 0.25s;
}
.rank-item:hover { transform: translateX(6px); border-color: rgba(139, 92, 255, 0.5); background: var(--surface-strong); }
.rank-num {
  width: 46px; height: 46px; border-radius: 14px;
  display: grid; place-items: center;
  font-size: 19px; font-weight: 900;
  background: var(--surface-strong); color: var(--text-2); border: 1px solid var(--stroke-soft);
}
.rank-item:nth-child(1) .rank-num { background: linear-gradient(135deg, #ffb35c, #ff8a3d); color: #fff; border: none; }
.rank-item:nth-child(2) .rank-num { background: linear-gradient(135deg, #c9d4e8, #8fa3c4); color: #1a2036; border: none; }
.rank-item:nth-child(3) .rank-num { background: linear-gradient(135deg, #ff9a6b, #d9683c); color: #fff; border: none; }

.rank-body h3 { font-size: 15.5px; font-weight: 700; line-height: 1.45; }
.rank-body h3 a:hover { color: var(--aqua); }
.rank-meta { display: flex; gap: 12px; margin-top: 5px; color: var(--text-3); font-size: 12.5px; flex-wrap: wrap; }
.rank-tag {
  padding: 4px 10px; border-radius: 999px; font-size: 11.5px; font-weight: 700;
  background: rgba(255, 95, 158, 0.14); color: #ff9ec4; border: 1px solid rgba(255, 95, 158, 0.3);
}
.rank-tag.t-enter { background: rgba(139, 92, 255, 0.14); color: #c3a6ff; border-color: rgba(139, 92, 255, 0.35); }
.rank-tag.t-society { background: rgba(61, 216, 255, 0.12); color: #9fe9ff; border-color: rgba(61, 216, 255, 0.3); }
.rank-tag.t-sport { background: rgba(255, 179, 92, 0.14); color: #ffd9a8; border-color: rgba(255, 179, 92, 0.35); }

.rank-heat { text-align: right; }
.rank-heat b { font-size: 16px; font-weight: 800; color: var(--brand-c); }
.rank-heat small { display: block; color: var(--text-3); font-size: 11.5px; }
.rank-heat .mini-bar {
  display: block; width: 84px; height: 5px; border-radius: 4px; margin-top: 7px;
  background: rgba(255, 255, 255, 0.1); overflow: hidden; position: relative;
}
.rank-heat .mini-bar::after {
  content: ""; position: absolute; inset: 0; border-radius: 4px;
  background: var(--grad-brand); width: var(--w, 60%);
}

/* ============================================================
   视频卡片
   ============================================================ */
.video-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.video-card {
  border-radius: var(--radius-m); overflow: hidden;
  background: var(--surface); border: 1px solid var(--stroke-soft);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}
.video-card:hover { transform: translateY(-8px); border-color: rgba(139, 92, 255, 0.55); box-shadow: var(--shadow-glow); }
.video-thumb {
  position: relative; aspect-ratio: 16 / 9.4; overflow: hidden;
  display: grid; place-items: center;
  background:
    radial-gradient(120px 80px at 30% 20%, rgba(255, 255, 255, 0.28), transparent 60%),
    var(--thumb-g, var(--grad-brand));
  color: #fff;
}
.video-thumb .glyph { font-size: 42px; filter: drop-shadow(0 6px 16px rgba(0, 0, 0, 0.35)); transition: transform 0.35s; }
.video-card:hover .glyph { transform: scale(1.18) rotate(-6deg); }
.video-dur {
  position: absolute; right: 10px; bottom: 10px;
  background: rgba(0, 0, 0, 0.55); color: #fff;
  font-size: 11.5px; font-weight: 700; padding: 3px 8px; border-radius: 7px;
  backdrop-filter: blur(4px);
}
.video-play {
  position: absolute; width: 52px; height: 52px; border-radius: 50%;
  background: rgba(255, 255, 255, 0.9); color: var(--brand-a);
  display: grid; place-items: center; font-size: 18px;
  opacity: 0; transform: scale(0.6); transition: all 0.3s;
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.4);
}
.video-card:hover .video-play { opacity: 1; transform: scale(1); }
.video-info { padding: 14px 16px 16px; }
.video-title { font-size: 14.5px; font-weight: 700; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.video-title a:hover { color: var(--aqua); }
.video-meta { display: flex; align-items: center; gap: 8px; margin-top: 11px; font-size: 12.5px; color: var(--text-3); }
.avatar {
  width: 26px; height: 26px; border-radius: 50%; flex: none;
  background: var(--grad-aqua); display: grid; place-items: center;
  color: #fff; font-size: 12px; font-weight: 800;
}
.avatar.a2 { background: linear-gradient(120deg, #ffb35c, #ff5f9e); }
.avatar.a3 { background: linear-gradient(120deg, #3dd8ff, #7f6bff); }
.avatar.a4 { background: linear-gradient(120deg, #ff8a5c, #ff2f92); }
.video-meta .dot-split { width: 3px; height: 3px; border-radius: 50%; background: var(--text-3); }
.video-meta .views { margin-left: auto; }

/* ============================================================
   频道卡片
   ============================================================ */
.channel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.channel-card {
  position: relative; overflow: hidden;
  border-radius: var(--radius-l); padding: 28px 26px;
  background: var(--surface); border: 1px solid var(--stroke-soft);
  transition: transform 0.3s, border-color 0.3s;
}
.channel-card::before {
  content: ""; position: absolute; top: -70px; right: -50px;
  width: 190px; height: 190px; border-radius: 50%;
  background: var(--ch-g, var(--grad-brand)); opacity: 0.28; filter: blur(26px);
  transition: opacity 0.3s;
}
.channel-card:hover { transform: translateY(-6px); border-color: rgba(255, 255, 255, 0.25); }
.channel-card:hover::before { opacity: 0.45; }
.channel-icon {
  width: 56px; height: 56px; border-radius: 17px;
  background: var(--ch-g, var(--grad-brand)); color: #fff;
  display: grid; place-items: center; font-size: 25px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
  margin-bottom: 18px;
}
.channel-card h3 { font-size: 19px; font-weight: 800; }
.channel-card p { color: var(--text-2); font-size: 13.5px; margin-top: 8px; line-height: 1.65; }
.channel-foot { display: flex; align-items: center; gap: 10px; margin-top: 20px; font-size: 12.5px; color: var(--text-3); }
.channel-foot .channel-link {
  margin-left: auto; color: var(--aqua); font-weight: 700; font-size: 13px;
  display: inline-flex; align-items: center; gap: 5px;
}

/* ============================================================
   创作者卡片
   ============================================================ */
.creator-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.creator-card {
  border-radius: var(--radius-m); padding: 26px 22px 22px;
  background: var(--surface); border: 1px solid var(--stroke-soft);
  text-align: center; transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}
.creator-card:hover { transform: translateY(-7px); border-color: rgba(61, 216, 255, 0.5); box-shadow: 0 16px 40px rgba(61, 216, 255, 0.14); }
.creator-avatar {
  width: 76px; height: 76px; border-radius: 50%; margin: 0 auto 16px;
  background: var(--grad-aqua); display: grid; place-items: center;
  color: #fff; font-size: 26px; font-weight: 900;
  border: 3px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 0 6px rgba(61, 216, 255, 0.12);
}
.creator-card.c2 .creator-avatar { background: linear-gradient(120deg, #ffb35c, #ff5f9e); box-shadow: 0 0 0 6px rgba(255, 95, 158, 0.12); }
.creator-card.c3 .creator-avatar { background: linear-gradient(120deg, #8b5cff, #3dd8ff); box-shadow: 0 0 0 6px rgba(139, 92, 255, 0.14); }
.creator-card.c4 .creator-avatar { background: linear-gradient(120deg, #ff8a5c, #ff2f92); box-shadow: 0 0 0 6px rgba(255, 47, 146, 0.12); }
.creator-card h3 { font-size: 16.5px; font-weight: 800; }
.creator-card .role { color: var(--brand-c); font-size: 12.5px; font-weight: 600; margin-top: 3px; }
.creator-card .bio { color: var(--text-3); font-size: 13px; margin-top: 10px; line-height: 1.6; }
.creator-follow {
  margin-top: 16px; padding: 8px 22px; border-radius: 999px;
  background: var(--surface-strong); border: 1px solid var(--stroke);
  font-size: 13px; font-weight: 700; color: var(--text-1);
  transition: all 0.25s;
}
.creator-follow:hover { background: var(--grad-brand); border-color: transparent; }

/* ============================================================
   CTA 横幅
   ============================================================ */
.cta-banner {
  position: relative; overflow: hidden;
  border-radius: var(--radius-l);
  background:
    radial-gradient(600px 300px at 80% 0%, rgba(255, 179, 92, 0.28), transparent 60%),
    radial-gradient(500px 300px at 10% 100%, rgba(139, 92, 255, 0.32), transparent 55%),
    linear-gradient(120deg, #1b1240, #2a1040);
  border: 1px solid var(--stroke);
  padding: 56px 48px;
  display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 30px; align-items: center;
}
.cta-banner h2 { font-size: clamp(24px, 3.6vw, 34px); font-weight: 900; line-height: 1.3; }
.cta-banner p { color: var(--text-2); margin-top: 12px; font-size: 15px; max-width: 560px; }
.cta-btns { display: flex; gap: 14px; margin-top: 26px; flex-wrap: wrap; }
.cta-emoji { font-size: clamp(72px, 10vw, 110px); text-align: center; filter: drop-shadow(0 16px 34px rgba(255, 95, 158, 0.4)); animation: floaty 4s ease-in-out infinite; }

/* ============================================================
   页脚
   ============================================================ */
.site-footer { margin-top: 100px; border-top: 1px solid var(--stroke); background: rgba(5, 6, 12, 0.6); }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px;
  padding: 54px 0 44px;
}
.footer-brand p { color: var(--text-3); font-size: 13.5px; margin-top: 14px; max-width: 300px; line-height: 1.7; }
.footer-social { display: flex; gap: 10px; margin-top: 18px; }
.footer-social a {
  width: 38px; height: 38px; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--stroke);
  display: grid; place-items: center; font-size: 16px;
  transition: all 0.25s;
}
.footer-social a:hover { background: var(--grad-brand); border-color: transparent; transform: translateY(-3px); }
.footer-col h4 { font-size: 14.5px; font-weight: 800; margin-bottom: 16px; }
.footer-col a { display: block; color: var(--text-3); font-size: 13.5px; padding: 6px 0; transition: color 0.2s, transform 0.2s; }
.footer-col a:hover { color: var(--aqua); transform: translateX(4px); }
.footer-note { color: var(--text-3); font-size: 12px; line-height: 1.8; margin-top: 18px; }
.footer-bottom {
  border-top: 1px solid var(--stroke-soft);
  padding: 20px 0; display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  color: var(--text-3); font-size: 12.5px;
}
.footer-bottom a { color: var(--text-2); }
.footer-bottom a:hover { color: var(--aqua); }

/* ============================================================
   弹窗
   ============================================================ */
.modal {
  position: fixed; inset: 0; z-index: 300;
  display: grid; place-items: center; padding: 20px;
  background: rgba(5, 6, 14, 0.78); backdrop-filter: blur(8px);
  opacity: 0; visibility: hidden; transition: opacity 0.3s, visibility 0.3s;
}
.modal.open { opacity: 1; visibility: visible; }
.modal-card {
  position: relative; width: min(560px, 100%);
  border-radius: var(--radius-l);
  background: linear-gradient(180deg, #161a35, #0d0f22);
  border: 1px solid var(--stroke);
  padding: 36px 32px;
  transform: translateY(26px) scale(0.96); transition: transform 0.35s;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
}
.modal.open .modal-card { transform: translateY(0) scale(1); }
.modal-close {
  position: absolute; top: 16px; right: 16px;
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--surface); border: 1px solid var(--stroke);
  font-size: 15px; color: var(--text-2); transition: all 0.25s;
}
.modal-close:hover { background: #ff4d6d; color: #fff; transform: rotate(90deg); }
.modal-icon { font-size: 44px; text-align: center; margin-bottom: 14px; }
.modal-card h3 { text-align: center; font-size: 22px; font-weight: 800; }
.modal-card p { text-align: center; color: var(--text-2); font-size: 14px; margin-top: 10px; line-height: 1.7; }
.modal-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px; }
.modal-actions .btn { padding: 13px 18px; font-size: 14.5px; }
.modal-dl { text-align: center; margin-top: 18px; font-size: 12.5px; color: var(--text-3); }
.modal-dl a { color: var(--aqua); font-weight: 600; }

/* ============================================================
   回到顶部
   ============================================================ */
.to-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 150;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--grad-brand); color: #fff; font-size: 18px;
  box-shadow: 0 10px 30px rgba(255, 95, 158, 0.45);
  display: grid; place-items: center;
  opacity: 0; visibility: hidden; transform: translateY(16px);
  transition: all 0.3s;
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { transform: translateY(-4px); }

/* ============================================================
   页面头部（内页）
   ============================================================ */
.page-hero { position: relative; overflow: hidden; padding: 64px 0 30px; }
.page-hero::after {
  content: ""; position: absolute; top: -120px; right: -100px;
  width: 340px; height: 340px; border-radius: 50%;
  background: rgba(139, 92, 255, 0.22); filter: blur(60px);
}
.page-hero h1 { font-size: clamp(32px, 5vw, 48px); font-weight: 900; letter-spacing: 0.5px; position: relative; z-index: 1; }
.page-hero p { color: var(--text-2); margin-top: 14px; max-width: 660px; font-size: 15.5px; position: relative; z-index: 1; }
.breadcrumb { display: flex; gap: 8px; font-size: 13px; color: var(--text-3); margin-bottom: 16px; position: relative; z-index: 1; flex-wrap: wrap; }
.breadcrumb a:hover { color: var(--aqua); }
.breadcrumb .sep { color: var(--text-3); }

/* ============================================================
   热榜 Tab 切换
   ============================================================ */
.tab-panel { display: none; }
.tab-panel.active { display: block; animation: fadeUp 0.4s ease; }
@keyframes fadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }

/* ============================================================
   统计大字报（创作者页）
   ============================================================ */
.stat-band {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  border-radius: var(--radius-l);
  background: var(--surface); border: 1px solid var(--stroke);
  padding: 34px 28px;
}
.stat-band .stat { text-align: center; }
.stat-band .num { font-size: clamp(30px, 4vw, 42px); font-weight: 900; line-height: 1.1; }
.stat-band .lbl { color: var(--text-3); font-size: 13px; margin-top: 6px; }

/* ============================================================
   社区页：互动横幅 / FAQ
   ============================================================ */
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.topic-card {
  border-radius: var(--radius-m); padding: 24px 22px;
  background: var(--surface); border: 1px solid var(--stroke-soft);
  transition: transform 0.3s, border-color 0.3s;
}
.topic-card:hover { transform: translateY(-5px); border-color: rgba(139, 92, 255, 0.5); }
.topic-card .emoji { font-size: 30px; }
.topic-card h3 { font-size: 16px; font-weight: 800; margin-top: 12px; }
.topic-card p { color: var(--text-2); font-size: 13.5px; margin-top: 7px; line-height: 1.65; }
.topic-card .hot-cnt { display: inline-block; margin-top: 12px; font-size: 12px; color: var(--brand-c); font-weight: 700; }

.faq-list { display: grid; gap: 14px; max-width: 860px; }
.faq-item {
  border-radius: var(--radius-m); overflow: hidden;
  background: var(--surface); border: 1px solid var(--stroke-soft);
}
.faq-q {
  width: 100%; display: flex; align-items: center; gap: 12px;
  padding: 18px 22px; text-align: left;
  font-size: 15.5px; font-weight: 700; color: var(--text-1);
}
.faq-q .q-icon {
  width: 30px; height: 30px; border-radius: 10px; flex: none;
  background: rgba(139, 92, 255, 0.2); color: var(--brand-a);
  display: grid; place-items: center; font-size: 13px; font-weight: 900;
}
.faq-q .chev { margin-left: auto; color: var(--text-3); transition: transform 0.3s; font-size: 14px; }
.faq-item.open .chev { transform: rotate(180deg); }
.faq-a { display: none; padding: 0 22px 20px 64px; color: var(--text-2); font-size: 14px; line-height: 1.8; }
.faq-item.open .faq-a { display: block; animation: fadeUp 0.3s ease; }

/* ============================================================
   入驻申请表单（创作者页弹窗）
   ============================================================ */
.join-form { margin-top: 22px; display: grid; gap: 8px; text-align: left; }
.join-form label { font-size: 13px; font-weight: 700; color: var(--text-2); margin-top: 6px; }
.join-form input, .join-form select {
  width: 100%; padding: 12px 14px; border-radius: 12px;
  background: var(--surface); border: 1px solid var(--stroke);
  color: var(--text-1); font-family: inherit; font-size: 14px;
  transition: border-color 0.25s, background 0.25s, box-shadow 0.25s;
}
.join-form input::placeholder { color: var(--text-3); }
.join-form input:focus, .join-form select:focus {
  outline: none; border-color: var(--aqua);
  background: var(--surface-strong); box-shadow: 0 0 0 3px rgba(61, 216, 255, 0.15);
}
.join-form select option { background: var(--bg-1); color: var(--text-1); }

/* ============================================================
   下载页引导区（社区页共用）
   ============================================================ */
.dl-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.dl-card {
  border-radius: var(--radius-m); padding: 28px 24px;
  background: var(--surface); border: 1px solid var(--stroke-soft);
  text-align: center; transition: transform 0.3s, border-color 0.3s;
}
.dl-card:hover { transform: translateY(-6px); border-color: rgba(255, 179, 92, 0.55); }
.dl-card .ico { font-size: 38px; }
.dl-card h3 { font-size: 17px; font-weight: 800; margin-top: 14px; }
.dl-card p { color: var(--text-3); font-size: 13px; margin-top: 8px; line-height: 1.6; }
.dl-btn {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: 18px; padding: 10px 26px; border-radius: 999px;
  background: var(--grad-brand); color: #fff; font-weight: 700; font-size: 14px;
  transition: transform 0.25s, box-shadow 0.25s;
}
.dl-btn:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(255, 95, 158, 0.45); }
.dl-btn.alt { background: var(--grad-aqua); }

/* ============================================================
   滚动显现动画（JS 增强，无 JS 时内容正常可见）
   ============================================================ */
.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.js .reveal.visible { opacity: 1; transform: none; }
.js .reveal[data-delay="1"] { transition-delay: 0.08s; }
.js .reveal[data-delay="2"] { transition-delay: 0.16s; }
.js .reveal[data-delay="3"] { transition-delay: 0.24s; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .creator-grid { grid-template-columns: repeat(3, 1fr); }
  .hero-inner { grid-template-columns: 1fr; gap: 56px; }
  .hero-phone { order: -1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .cta-banner { grid-template-columns: 1fr; padding: 44px 30px; }
  .cta-emoji { text-align: left; font-size: 64px; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .menu-toggle { display: grid; margin-left: auto; }
  .section { padding: 60px 0 10px; }
  .hero { padding: 64px 0 56px; }
  .video-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .channel-grid { grid-template-columns: 1fr; }
  .creator-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-band { grid-template-columns: repeat(2, 1fr); gap: 24px 16px; }
  .topic-grid { grid-template-columns: 1fr; }
  .dl-row { grid-template-columns: 1fr; }
  .rank-item { grid-template-columns: 46px 1fr; }
  .rank-heat { display: none; }
  .hero-stats { gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; padding: 44px 0 30px; }
  .modal-actions { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .video-grid { grid-template-columns: 1fr; }
  .creator-grid { grid-template-columns: 1fr; }
  .hero-cta .btn { width: 100%; }
  .btn--lg { width: 100%; }
  .section-link { display: none; }
  .phone { width: 250px; }
}