/* =========================================================
   瓜瓜社 · 热血瓜场 · 霓虹深夜
   共享设计系统 style.css
   ========================================================= */

/* ---------- 设计令牌 ---------- */
:root {
  /* 背景体系：深夜蓝紫 */
  --bg: #0d0b1a;
  --bg-2: #15102e;
  --bg-3: #1d1640;
  --card: rgba(255, 255, 255, 0.05);
  --card-strong: rgba(255, 255, 255, 0.09);
  --line: rgba(255, 255, 255, 0.1);

  /* 瓜色撞色体系 */
  --melon: #ff4d6d;        /* 瓜红 · 主色 */
  --sun: #ff9f43;          /* 日落橙 */
  --green: #2ee6a8;        /* 瓜绿 */
  --yellow: #ffd166;       /* 瓜黄 */
  --violet: #9d6bff;       /* 霓虹紫 */

  /* 文字 */
  --text: #f7f4ff;
  --muted: #a99fc4;
  --dim: #7b719b;

  /* 渐变 */
  --grad-melon: linear-gradient(135deg, #ff4d6d 0%, #ff9f43 100%);
  --grad-cool: linear-gradient(135deg, #2ee6a8 0%, #9d6bff 100%);
  --grad-hero: radial-gradient(1200px 600px at 80% -10%, rgba(255, 77, 109, 0.35), transparent 60%),
               radial-gradient(900px 500px at 10% 10%, rgba(157, 107, 255, 0.3), transparent 55%),
               radial-gradient(800px 600px at 50% 120%, rgba(46, 230, 168, 0.18), transparent 60%);

  /* 形状 */
  --r-lg: 24px;
  --r-md: 16px;
  --r-sm: 10px;
  --r-pill: 999px;

  /* 阴影 */
  --shadow-1: 0 10px 30px rgba(0, 0, 0, 0.35);
  --shadow-2: 0 24px 60px rgba(0, 0, 0, 0.45);
  --glow-melon: 0 8px 40px rgba(255, 77, 109, 0.35);
  --glow-green: 0 8px 40px rgba(46, 230, 168, 0.25);

  /* 字体 */
  --font-display: "ZCOOL KuaiLe", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  /* 尺寸 */
  --nav-h: 72px;
  --max-w: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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; }

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

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: linear-gradient(180deg, var(--melon), var(--violet)); border-radius: 99px; }

/* 背景氛围 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background: var(--grad-hero), var(--bg);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}

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

/* 无障碍跳过链接 */
.skip-link {
  position: absolute;
  left: -999px;
  top: 8px;
  background: var(--melon);
  color: #fff;
  padding: 10px 18px;
  border-radius: var(--r-sm);
  z-index: 999;
}
.skip-link:focus { left: 8px; }

/* ---------- 工具类 ---------- */
.container { width: min(var(--max-w), 92%); margin-inline: auto; }

.section { padding: 84px 0; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 36px; flex-wrap: wrap; }
.section-title { font-family: var(--font-display); font-size: clamp(26px, 4.5vw, 40px); line-height: 1.3; letter-spacing: 1px; }
.section-title .grad { background: var(--grad-melon); -webkit-background-clip: text; background-clip: text; color: transparent; }
.section-sub { color: var(--muted); margin-top: 8px; font-size: 15px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--green);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--grad-cool); border-radius: 2px; }

/* 徽章 */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--r-pill);
  font-size: 12px;
  font-weight: 700;
  background: var(--card-strong);
  border: 1px solid var(--line);
  color: var(--text);
  white-space: nowrap;
}
.badge--melon { background: rgba(255, 77, 109, 0.15); color: #ff8ba1; border-color: rgba(255, 77, 109, 0.35); }
.badge--green { background: rgba(46, 230, 168, 0.12); color: var(--green); border-color: rgba(46, 230, 168, 0.35); }
.badge--sun { background: rgba(255, 159, 67, 0.14); color: var(--sun); border-color: rgba(255, 159, 67, 0.35); }
.badge--violet { background: rgba(157, 107, 255, 0.14); color: #b9a2ff; border-color: rgba(157, 107, 255, 0.35); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: var(--r-pill);
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 1px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
  will-change: transform;
}
.btn svg { flex: none; }
.btn:active { transform: scale(0.96); }

.btn--melon {
  background: var(--grad-melon);
  color: #fff;
  box-shadow: var(--glow-melon);
}
.btn--melon:hover { transform: translateY(-3px); box-shadow: 0 14px 50px rgba(255, 77, 109, 0.5); }

.btn--ghost {
  background: var(--card);
  border: 1.5px solid var(--line);
  color: var(--text);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { border-color: var(--melon); color: var(--melon); transform: translateY(-3px); }

.btn--green { background: var(--grad-cool); color: #0b0e1a; box-shadow: var(--glow-green); }
.btn--green:hover { transform: translateY(-3px); }

.btn--block { width: 100%; }
.btn--lg { padding: 18px 36px; font-size: 18px; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(13, 11, 26, 0.72);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.nav--scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.brand { display: flex; align-items: center; gap: 12px; font-family: var(--font-display); font-size: 22px; letter-spacing: 1px; }
.brand-mark {
  width: 44px; height: 44px;
  border-radius: 14px;
  background: var(--grad-melon);
  display: grid; place-items: center;
  font-size: 24px;
  box-shadow: var(--glow-melon);
  flex: none;
}
.brand-name b { font-weight: 400; }
.brand-name .dot { color: var(--green); }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 10px 16px;
  border-radius: var(--r-pill);
  font-size: 15px;
  font-weight: 600;
  color: var(--muted);
  transition: color 0.2s, background 0.2s;
  position: relative;
}
.nav-links a:hover { color: var(--text); background: var(--card); }
.nav-links a.active { color: var(--text); background: var(--card-strong); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 3px;
  transform: translateX(-50%);
  width: 16px; height: 3px;
  border-radius: 3px;
  background: var(--grad-melon);
}

.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-cta .btn { padding: 11px 22px; font-size: 14px; }

/* 汉堡菜单 */
.nav-burger {
  display: none;
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  place-items: center;
  position: relative;
  z-index: 102;
}
.nav-burger span {
  display: block;
  width: 20px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-burger span + span { margin-top: 5px; }
.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); }

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 101;
  background: var(--bg-2);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.mobile-menu.open { opacity: 1; visibility: visible; }
.mobile-menu a {
  font-family: var(--font-display);
  font-size: 30px;
  padding: 14px 8px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text);
}
.mobile-menu a small { font-family: var(--font-body); color: var(--dim); font-size: 13px; }
.mobile-menu .btn { margin-top: 24px; }

/* ---------- 首页 Hero ---------- */
.hero { position: relative; padding: 64px 0 88px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 56px; align-items: center; }

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(40px, 7vw, 76px);
  line-height: 1.12;
  letter-spacing: 2px;
  margin-bottom: 20px;
}
.hero h1 .grad { background: var(--grad-melon); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero h1 .grad--cool { background: var(--grad-cool); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero h1 .wobble { display: inline-block; animation: wobble 3.2s ease-in-out infinite; }

.hero-desc { color: var(--muted); font-size: 17px; max-width: 520px; margin-bottom: 30px; }

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 34px; }

.hero-stats { display: flex; gap: 34px; flex-wrap: wrap; }
.hero-stat { display: flex; flex-direction: column; }
.hero-stat b { font-family: var(--font-display); font-size: 30px; letter-spacing: 1px; }
.hero-stat b.grad { background: var(--grad-melon); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-stat span { color: var(--dim); font-size: 13px; letter-spacing: 1px; }

/* Hero 右侧 · 瓜堆卡片 */
.hero-visual { position: relative; }
.melon-stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: floaty 5s ease-in-out infinite;
}
.melon-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-1);
}
.melon-card--main { background: rgba(255, 77, 109, 0.12); border-color: rgba(255, 77, 109, 0.35); }
.melon-card--cool { background: rgba(46, 230, 168, 0.1); border-color: rgba(46, 230, 168, 0.3); }
.melon-card--sun { background: rgba(255, 159, 67, 0.1); border-color: rgba(255, 159, 67, 0.3); }

.melon-avatar {
  width: 52px; height: 52px;
  border-radius: 16px;
  display: grid; place-items: center;
  font-size: 26px;
  flex: none;
  background: var(--bg-3);
}
.melon-card--main .melon-avatar { background: rgba(255, 77, 109, 0.25); }
.melon-card--cool .melon-avatar { background: rgba(46, 230, 168, 0.2); }
.melon-card--sun .melon-avatar { background: rgba(255, 159, 67, 0.2); }

.melon-info { flex: 1; min-width: 0; }
.melon-info h3 { font-size: 15px; font-weight: 800; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.melon-info p { font-size: 12px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.melon-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 700;
  color: var(--green);
  background: rgba(46, 230, 168, 0.12);
  padding: 5px 12px;
  border-radius: var(--r-pill);
  flex: none;
}
.melon-tag .pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--green); animation: pulse 1.6s ease-in-out infinite; }

/* 滚动标语 */
.marquee {
  position: relative;
  overflow: hidden;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  margin-top: 60px;
  white-space: nowrap;
}
.marquee-track { display: inline-flex; gap: 56px; animation: marquee 22s linear infinite; }
.marquee-track span { font-family: var(--font-display); font-size: 18px; letter-spacing: 2px; color: var(--muted); display: inline-flex; align-items: center; gap: 12px; }
.marquee-track span::after { content: "🍉"; font-size: 16px; }
.marquee-track .hot { color: var(--melon); }
.marquee-track .cool { color: var(--green); }
.marquee-track .sun { color: var(--sun); }

/* ---------- 分类频道 ---------- */
.channels { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.channel-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 26px 22px;
  transition: transform 0.3s ease, border-color 0.3s ease, background 0.3s ease;
  position: relative;
  overflow: hidden;
}
.channel-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--grad-melon);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 0;
}
.channel-card:hover { transform: translateY(-6px); border-color: rgba(255, 77, 109, 0.5); }
.channel-card:hover::before { opacity: 0.06; }
.channel-card > * { position: relative; z-index: 1; }
.channel-emoji { font-size: 40px; margin-bottom: 14px; display: block; }
.channel-card h3 { font-size: 18px; font-weight: 800; margin-bottom: 6px; }
.channel-card p { font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.channel-count { font-size: 12px; color: var(--dim); font-weight: 700; }
.channel-card:hover .channel-count { color: var(--melon); }

/* ---------- 排行榜 ---------- */
.rank-list { display: flex; flex-direction: column; gap: 12px; }
.rank-row {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 16px 20px;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}
.rank-row:hover { transform: translateX(6px); border-color: rgba(255, 77, 109, 0.45); background: var(--card-strong); }
.rank-no {
  font-family: var(--font-display);
  font-size: 26px;
  width: 46px; height: 46px;
  border-radius: 14px;
  display: grid; place-items: center;
  background: var(--bg-3);
  color: var(--muted);
  flex: none;
}
.rank-row:nth-child(1) .rank-no { background: var(--grad-melon); color: #fff; box-shadow: var(--glow-melon); }
.rank-row:nth-child(2) .rank-no { background: linear-gradient(135deg, #ff9f43, #ffd166); color: #2a1405; }
.rank-row:nth-child(3) .rank-no { background: linear-gradient(135deg, #9d6bff, #ff4d6d); color: #fff; }
.rank-body { flex: 1; min-width: 0; }
.rank-body h3 { font-size: 16px; font-weight: 800; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rank-body .rank-meta { font-size: 12px; color: var(--muted); display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
.rank-heat { display: flex; align-items: center; gap: 12px; flex: none; width: 180px; }
.heat-bar { height: 8px; flex: 1; background: var(--bg-3); border-radius: 99px; overflow: hidden; }
.heat-bar i { display: block; height: 100%; border-radius: 99px; background: var(--grad-melon); }
.heat-num { font-size: 13px; font-weight: 800; color: var(--melon); width: 58px; text-align: right; flex: none; }
.rank-arrow { color: var(--dim); font-size: 13px; font-weight: 700; flex: none; }
.rank-arrow.up { color: var(--green); }
.rank-arrow.down { color: var(--melon); }

/* ---------- 视频卡片 ---------- */
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.video-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}
.video-card:hover { transform: translateY(-6px); border-color: rgba(255, 77, 109, 0.5); box-shadow: var(--shadow-1); }
.video-thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-3);
}
.video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play {
  position: absolute;
  inset: 0;
  display: grid; place-items: center;
  background: rgba(13, 11, 26, 0.35);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.video-card:hover .video-play { opacity: 1; }
.video-play span {
  width: 58px; height: 58px;
  border-radius: 50%;
  background: var(--grad-melon);
  display: grid; place-items: center;
  box-shadow: var(--glow-melon);
  font-size: 20px;
  color: #fff;
}
.video-dur {
  position: absolute;
  right: 10px; bottom: 10px;
  font-size: 12px; font-weight: 700;
  background: rgba(13, 11, 26, 0.8);
  padding: 3px 9px;
  border-radius: 8px;
  color: #fff;
}
.video-live {
  position: absolute;
  left: 10px; top: 10px;
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 800;
  color: #fff;
  background: var(--melon);
  padding: 4px 10px;
  border-radius: var(--r-pill);
}
.video-live::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #fff; animation: pulse 1.2s infinite; }
.video-body { padding: 18px 20px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.video-body h3 { font-size: 16px; font-weight: 800; line-height: 1.45; }
.video-meta { display: flex; justify-content: space-between; align-items: center; margin-top: auto; }
.video-meta .views { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 6px; }
.video-meta .views b { color: var(--text); }

/* ---------- 筛选 chips ---------- */
.chips { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 30px; }
.chip {
  padding: 9px 20px;
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: 700;
  color: var(--muted);
  background: var(--card);
  border: 1px solid var(--line);
  transition: all 0.25s ease;
}
.chip:hover { color: var(--text); border-color: var(--melon); }
.chip.active { color: #fff; background: var(--grad-melon); border-color: transparent; box-shadow: var(--glow-melon); }

/* ---------- 深度爆料卡 ---------- */
.deep-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.deep-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 26px;
  display: flex;
  gap: 20px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.deep-card:hover { transform: translateY(-5px); border-color: rgba(157, 107, 255, 0.5); }
.deep-no {
  font-family: var(--font-display);
  font-size: 34px;
  color: transparent;
  background: var(--grad-cool);
  -webkit-background-clip: text;
  background-clip: text;
  flex: none;
  line-height: 1;
}
.deep-body { flex: 1; }
.deep-body h3 { font-size: 17px; font-weight: 800; margin-bottom: 8px; }
.deep-body p { font-size: 13.5px; color: var(--muted); margin-bottom: 14px; }
.deep-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

/* ---------- 下载 CTA 横幅 ---------- */
.download-banner {
  background: linear-gradient(135deg, rgba(255, 77, 109, 0.16), rgba(157, 107, 255, 0.14), rgba(46, 230, 168, 0.1));
  border: 1px solid var(--line);
  border-radius: 32px;
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 40px;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.download-banner::before {
  content: "🍉";
  position: absolute;
  font-size: 180px;
  right: -30px; bottom: -40px;
  opacity: 0.08;
  transform: rotate(-15deg);
}
.download-banner h2 { font-family: var(--font-display); font-size: clamp(24px, 4vw, 34px); margin-bottom: 10px; }
.download-banner p { color: var(--muted); margin-bottom: 22px; max-width: 480px; }
.download-banner .btn-group { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 订阅 ---------- */
.subscribe-box {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 34px;
  text-align: center;
  max-width: 620px;
  margin-inline: auto;
}
.subscribe-box h3 { font-family: var(--font-display); font-size: 24px; margin-bottom: 10px; }
.subscribe-box p { color: var(--muted); font-size: 14px; margin-bottom: 22px; }
.subscribe-form { display: flex; gap: 10px; max-width: 460px; margin-inline: auto; }
.subscribe-form input {
  flex: 1;
  padding: 13px 18px;
  border-radius: var(--r-pill);
  border: 1.5px solid var(--line);
  background: var(--bg-2);
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
  min-width: 0;
}
.subscribe-form input::placeholder { color: var(--dim); }
.subscribe-form input:focus { border-color: var(--melon); }

/* ---------- 页脚 ---------- */
.footer { border-top: 1px solid var(--line); background: rgba(13, 11, 26, 0.6); padding: 56px 0 28px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 44px; }
.footer .brand { margin-bottom: 16px; }
.footer-desc { color: var(--muted); font-size: 14px; max-width: 320px; margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 40px; height: 40px;
  border-radius: 12px;
  background: var(--card);
  border: 1px solid var(--line);
  display: grid; place-items: center;
  font-size: 17px;
  transition: all 0.25s ease;
}
.footer-social a:hover { background: var(--grad-melon); border-color: transparent; transform: translateY(-3px); }
.footer h4 { font-size: 15px; font-weight: 800; margin-bottom: 18px; letter-spacing: 1px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--muted); font-size: 14px; transition: color 0.2s, padding-left 0.2s; }
.footer-links a:hover { color: var(--melon); padding-left: 6px; }
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--dim);
  font-size: 13px;
}
.footer-bottom a { color: var(--dim); }
.footer-bottom a:hover { color: var(--melon); }

/* ---------- 弹窗 ---------- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}
.modal.open { opacity: 1; visibility: visible; }
.modal-mask { position: absolute; inset: 0; background: rgba(8, 6, 18, 0.82); backdrop-filter: blur(10px); }
.modal-panel {
  position: relative;
  z-index: 1;
  width: min(860px, 100%);
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  transform: translateY(24px) scale(0.98);
  transition: transform 0.35s ease;
}
.modal.open .modal-panel { transform: translateY(0) scale(1); }
.modal-close {
  position: absolute;
  top: 14px; right: 14px;
  z-index: 2;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(13, 11, 26, 0.8);
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 18px;
  display: grid; place-items: center;
  transition: all 0.2s ease;
}
.modal-close:hover { background: var(--melon); transform: rotate(90deg); }
.video-frame { aspect-ratio: 16 / 9; background: #000; display: grid; place-items: center; }
.video-frame .play-tip { color: var(--muted); font-size: 18px; text-align: center; }
.modal-title { padding: 18px 24px; font-weight: 800; font-size: 18px; border-top: 1px solid var(--line); }
.modal-meta { padding: 0 24px 22px; color: var(--muted); font-size: 13px; display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* 回到顶部 */
.to-top {
  position: fixed;
  right: 22px; bottom: 22px;
  z-index: 90;
  width: 50px; height: 50px;
  border-radius: 50%;
  background: var(--grad-melon);
  color: #fff;
  font-size: 20px;
  display: grid; place-items: center;
  box-shadow: var(--glow-melon);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: all 0.35s ease;
}
.to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { transform: translateY(-4px); }

/* ---------- 下载页 ---------- */
.download-hero { padding: 72px 0 48px; text-align: center; }
.download-hero h1 { font-family: var(--font-display); font-size: clamp(34px, 6vw, 60px); margin-bottom: 16px; }
.download-hero .sub { color: var(--muted); font-size: 17px; max-width: 560px; margin: 0 auto 36px; }
.phone-mock {
  width: 220px;
  margin: 0 auto 40px;
  border-radius: 40px;
  border: 6px solid #2a2448;
  background: var(--bg-2);
  box-shadow: var(--shadow-2);
  padding: 14px;
  position: relative;
}
.phone-mock::before {
  content: "";
  position: absolute;
  top: 12px; left: 50%;
  transform: translateX(-50%);
  width: 80px; height: 5px;
  border-radius: 99px;
  background: #2a2448;
}
.phone-screen {
  border-radius: 26px;
  background: linear-gradient(160deg, rgba(255, 77, 109, 0.35), rgba(157, 107, 255, 0.3));
  padding: 40px 16px 24px;
  text-align: center;
  overflow: hidden;
}
.phone-screen .app-icon {
  width: 64px; height: 64px;
  margin: 0 auto 12px;
  border-radius: 18px;
  background: var(--grad-melon);
  display: grid; place-items: center;
  font-size: 34px;
  box-shadow: var(--glow-melon);
}
.phone-screen h3 { font-family: var(--font-display); font-size: 20px; margin-bottom: 18px; }
.phone-rank { display: flex; flex-direction: column; gap: 10px; }
.phone-rank .mini { font-size: 12px; font-weight: 700; color: var(--muted); text-align: left; padding-left: 4px; }
.phone-rank-item {
  background: rgba(13, 11, 26, 0.55);
  border-radius: 12px;
  padding: 10px 12px;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 10px;
}
.phone-rank-item b { font-size: 14px; color: var(--yellow); font-family: var(--font-display); }
.phone-rank-item span { font-size: 12px; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.qr-box {
  width: 180px; height: 180px;
  margin: 26px auto 10px;
  border-radius: 22px;
  background: #fff;
  padding: 14px;
  box-shadow: var(--shadow-2);
}
.qr-box img { width: 100%; height: 100%; object-fit: contain; }
.download-platforms { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 14px; }
.download-platforms .btn { min-width: 170px; }

.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(--r-lg);
  padding: 26px 22px;
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.feature-card:hover { transform: translateY(-6px); border-color: rgba(46, 230, 168, 0.5); }
.feature-emoji { font-size: 40px; margin-bottom: 14px; display: block; }
.feature-card h3 { font-size: 17px; font-weight: 800; margin-bottom: 8px; }
.feature-card p { font-size: 13px; color: var(--muted); }

/* ---------- 动画 ---------- */
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.4; transform: scale(0.8); } }
@keyframes wobble { 0%, 100% { transform: rotate(0); } 15% { transform: rotate(-6deg); } 30% { transform: rotate(5deg); } 45% { transform: rotate(-3deg); } 60% { transform: rotate(0); } }
@keyframes marquee { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { max-width: 520px; }
  .channels { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .deep-grid { grid-template-columns: 1fr; }
  .download-banner { grid-template-columns: 1fr; padding: 36px 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .rank-heat { width: 130px; }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .nav-links, .nav-cta .btn--ghost { display: none; }
  .nav-burger { display: grid; }
  .rank-row { flex-wrap: wrap; gap: 12px; }
  .rank-no { width: 40px; height: 40px; font-size: 22px; border-radius: 12px; }
  .rank-heat { width: 100%; }
  .deep-card { flex-direction: column; gap: 10px; }
  .subscribe-form { flex-direction: column; }
  .marquee-track span { font-size: 15px; }
}

@media (max-width: 560px) {
  .channels { grid-template-columns: 1fr 1fr; gap: 14px; }
  .channel-card { padding: 20px 16px; }
  .video-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .hero-cta .btn { width: 100%; }
  .download-platforms .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { justify-content: center; text-align: center; }
  .btn--lg { width: 100%; }
}

/* 减少动态效果偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}