/* ============================================================
   品游互动官网 - 全站样式
   纯静态站点，双主题（亮/暗），默认亮色
   ============================================================ */

/* ---------- 亮色主题（默认） ---------- */
:root {
  /* 背景层级 */
  --bg-base: #F8FAFC;
  --bg-elevated: #FFFFFF;
  --bg-sunken: #F1F5F9;
  --bg-glass: rgba(255, 255, 255, 0.72);

  /* 文字层级 */
  --text-strong: #0F172A;
  --text-body: #334155;
  --text-muted: #64748B;
  --text-faint: #94A3B8;

  /* 品牌主色：靛蓝 → 紫 → 青 */
  --brand-1: #4F46E5;  /* indigo */
  --brand-2: #7C3AED;  /* violet */
  --brand-3: #06B6D4;  /* cyan */
  --brand-grad: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #06B6D4 100%);
  --brand-grad-soft: linear-gradient(135deg, rgba(79,70,229,.12) 0%, rgba(124,58,237,.12) 50%, rgba(6,182,212,.12) 100%);

  /* 功能色 */
  --success: #10B981;
  --warning: #F59E0B;
  --danger:  #EF4444;
  --info:    #3B82F6;

  /* 描边与阴影 */
  --border: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.14);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 8px 30px rgba(79, 70, 229, 0.25);

  /* 半径 */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 28px;
  --r-pill: 999px;

  /* 间距 */
  --container: 1200px;
  --nav-h: 78px;

  /* 字体 */
  --font-sans: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* ---------- 暗色主题 ---------- */
html[data-theme="dark"] {
  --bg-base: #0B1020;
  --bg-elevated: #141C33;
  --bg-sunken: #0F1729;
  --bg-glass: rgba(20, 28, 51, 0.72);

  --text-strong: #F1F5F9;
  --text-body: #CBD5E1;
  --text-muted: #94A3B8;
  --text-faint: #64748B;

  --brand-grad: linear-gradient(135deg, #6366F1 0%, #8B5CF6 45%, #22D3EE 100%);
  --brand-grad-soft: linear-gradient(135deg, rgba(99,102,241,.16) 0%, rgba(139,92,246,.16) 50%, rgba(34,211,238,.16) 100%);

  --border: rgba(148, 163, 184, 0.14);
  --border-strong: rgba(148, 163, 184, 0.24);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 18px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 8px 34px rgba(124, 92, 246, 0.45);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-body);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color .4s ease, color .4s ease;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul { margin: 0; padding: 0; list-style: none; }

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 排版 ---------- */
h1, h2, h3, h4 { color: var(--text-strong); font-weight: 700; line-height: 1.25; margin: 0; }
h1 { font-size: clamp(2.2rem, 5vw, 3.4rem); letter-spacing: -.02em; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.4rem); letter-spacing: -.015em; }
h3 { font-size: 1.25rem; }
p { margin: 0; }
.text-gradient {
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  background: var(--brand-grad-soft);
  color: var(--brand-2);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .03em;
  border: 1px solid var(--border);
}
html[data-theme="dark"] .eyebrow { color: #C4B5FD; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--r-pill);
  font-size: .98rem;
  font-weight: 600;
  transition: transform .25s cubic-bezier(.2,.8,.3,1), box-shadow .25s, background .25s;
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary {
  color: #fff;
  background: var(--brand-grad);
  background-size: 200% 200%;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { transform: translateY(-2px); background-position: 100% 0; box-shadow: 0 12px 40px rgba(124,58,237,.4); }
/* 导航栏购买按钮：绿色 + 更宽 */
.nav-buy {
  background: linear-gradient(135deg,#22C55E,#16A34A) !important;
  background-size: 200% 200% !important;
  box-shadow: 0 8px 24px rgba(22,163,74,.35) !important;
}
.nav-buy:hover { transform: translateY(-2px); background-position: 100% 0 !important; box-shadow: 0 12px 40px rgba(22,163,74,.45) !important; }
.btn-ghost {
  color: var(--text-strong);
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-sm);
}
.btn-ghost:hover { transform: translateY(-2px); border-color: var(--brand-2); color: var(--brand-2); box-shadow: var(--shadow-md); }

/* ---------- 导航栏 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 1000;
  display: flex;
  align-items: center;
  background: var(--bg-glass);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid var(--border);
  transition: background .4s ease, border-color .4s ease;
}
.nav-wrap {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--text-strong);
  letter-spacing: -.01em;
}
.brand .brand-logo {
  width: 34px; height: 34px;
  border-radius: 10px;
  background: transition;
  display: grid; place-items: center;
  color: #fff;
  flex-shrink: 0;
  box-shadow: var(--shadow-glow);
}
.brand .brand-logo svg { width: 20px; height: 20px; }
.brand .brand-logo img { width: 100%; height: 100%; object-fit: contain; border-radius: 10px; }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-menu a {
  position: relative;
  padding: 8px 14px;
  border-radius: var(--r-sm);
  font-size: 1.02rem;
  font-weight: 500;
  color: var(--text-body);
  transition: color .2s, background .2s;
}
.nav-menu a:hover { color: var(--text-strong); background: var(--brand-grad-soft); }
.nav-menu a.active { color: var(--brand-2); }
.nav-menu a.active::after {
  content: '';
  position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--brand-grad);
}
html[data-theme="dark"] .nav-menu a.active { color: #C4B5FD; }

.nav-actions { display: flex; align-items: center; gap: 10px; }

/* 主题切换按钮 */
.theme-toggle {
  width: 40px; height: 40px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  color: var(--text-strong);
  transition: transform .35s cubic-bezier(.2,.8,.3,1), background .25s, color .25s;
  overflow: hidden;
  position: relative;
}
.theme-toggle:hover { transform: rotate(20deg); border-color: var(--brand-2); color: var(--brand-2); }
.theme-toggle .icon-sun, .theme-toggle .icon-moon {
  position: absolute;
  width: 18px; height: 18px;
  transition: transform .45s cubic-bezier(.2,.8,.3,1), opacity .35s;
}
.theme-toggle .icon-sun { transform: translateY(0) rotate(0); opacity: 1; }
.theme-toggle .icon-moon { transform: translateY(30px) rotate(-90deg); opacity: 0; }
html[data-theme="dark"] .theme-toggle .icon-sun { transform: translateY(-30px) rotate(90deg); opacity: 0; }
html[data-theme="dark"] .theme-toggle .icon-moon { transform: translateY(0) rotate(0); opacity: 1; }

/* 汉堡菜单按钮 */
.nav-burger { display: none; }

/* ---------- 区块通用 ---------- */
.section { padding: 88px 0; }
.section-sm { padding: 56px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head h2 { margin-bottom: 16px; }
.section-head p { color: var(--text-muted); font-size: 1.02rem; }
.section-head.left { text-align: left; margin-left: 0; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: transform .35s cubic-bezier(.2,.8,.3,1), box-shadow .35s, border-color .35s;
  position: relative;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-strong);
}
.card-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: grid; place-items: center;
  background: var(--brand-grad);
  color: #fff;
  margin-bottom: 18px;
  box-shadow: var(--shadow-glow);
}
.card-icon svg { width: 26px; height: 26px; }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--text-muted); font-size: .95rem; }

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

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: calc(var(--nav-h) + 80px) 0 96px;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 500px at 18% 0%, rgba(79,70,229,.22), transparent 60%),
    radial-gradient(900px 500px at 82% 10%, rgba(6,182,212,.18), transparent 60%),
    radial-gradient(700px 400px at 50% 100%, rgba(124,58,237,.14), transparent 60%);
}
html[data-theme="dark"] .hero-bg {
  background:
    radial-gradient(1000px 600px at 15% 0%, rgba(99,102,241,.28), transparent 60%),
    radial-gradient(1000px 600px at 85% 5%, rgba(34,211,238,.18), transparent 60%),
    radial-gradient(800px 500px at 50% 100%, rgba(139,92,246,.20), transparent 60%);
}
.hero-bg img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: .18;
  mix-blend-mode: screen;
}
html[data-theme="dark"] .hero-bg img { opacity: .35; }
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  z-index: -1;
  animation: float 9s ease-in-out infinite;
}
.hero-orb.o1 { width: 320px; height: 320px; background: rgba(79,70,229,.45); top: -80px; left: -60px; }
.hero-orb.o2 { width: 260px; height: 260px; background: rgba(6,182,212,.40); top: 40%; right: -40px; animation-delay: -3s; }
.hero-orb.o3 { width: 220px; height: 220px; background: rgba(124,58,237,.40); bottom: -60px; left: 30%; animation-delay: -6s; }
@keyframes float { 0%,100% { transform: translateY(0) } 50% { transform: translateY(-30px) } }

.hero-inner { max-width: 820px; }
.hero h1 { margin: 18px 0 20px; }
.hero .lead { font-size: 1.15rem; color: var(--text-muted); max-width: 620px; margin-bottom: 32px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--r-pill);
  background: var(--bg-elevated);
  border: 1px solid var(--border-strong);
  color: var(--text-body);
  font-size: .82rem;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 4px rgba(16,185,129,.18); }

/* 平台图标墙 */
.platforms {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  color: var(--text-muted);
  font-size: .9rem;
}
.platforms .plat {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  font-weight: 600;
}
.platforms .plat .pdot { width: 8px; height: 8px; border-radius: 50%; background: var(--brand-grad); }

/* ---------- 统计条 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat {
  text-align: center;
  padding: 28px 20px;
  border-radius: var(--r-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.stat .num {
  font-size: 2.1rem;
  font-weight: 800;
  letter-spacing: -.02em;
  background: var(--brand-grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat .label { color: var(--text-muted); font-size: .9rem; margin-top: 6px; }

/* ---------- 场景双卡片 ---------- */
.scene-card {
  position: relative;
  border-radius: var(--r-xl);
  padding: 36px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  box-shadow: var(--shadow-sm);
  transition: transform .35s, box-shadow .35s;
}
.scene-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.scene-card .sc-bg { position: absolute; inset: 0; z-index: 0; opacity: .1; }
.scene-card > * { position: relative; z-index: 1; }
.scene-card h3 { font-size: 1.3rem; margin-bottom: 10px; }
.scene-card .sc-list { margin-top: 18px; display: grid; gap: 8px; }
.scene-card .sc-list li { display: flex; align-items: center; gap: 10px; color: var(--text-body); font-size: .94rem; }
.scene-card .sc-list li::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--brand-grad); flex-shrink: 0; }

/* ---------- 特色玩法条 ---------- */
.feature-pills { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-start; }
.feature-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  font-weight: 600;
  font-size: .92rem;
  color: var(--text-body);
  transition: transform .25s, border-color .25s, color .25s;
}
.feature-pill:hover { transform: translateY(-3px); border-color: var(--brand-2); color: var(--brand-2); }
.feature-pill .pill-icon { width: 18px; height: 18px; color: var(--brand-2); }

/* ---------- 下载 CTA 横幅 ---------- */
.cta-banner {
  position: relative;
  border-radius: var(--r-xl);
  padding: 56px 48px;
  overflow: hidden;
  text-align: center;
  color: #fff;
  background: var(--brand-grad);
  background-size: 200% 200%;
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(600px 300px at 20% 10%, rgba(255,255,255,.18), transparent 60%);
  z-index: -1;
}
.cta-banner h2 { color: #fff; margin-bottom: 14px; }
.cta-banner p { color: rgba(255,255,255,.86); max-width: 620px; margin: 0 auto 28px; }
.cta-banner .btn-ghost { background: rgba(255,255,255,.14); color: #fff; border-color: rgba(255,255,255,.3); backdrop-filter: blur(6px); }
.cta-banner .btn-ghost:hover { background: rgba(255,255,255,.22); border-color: #fff; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

/* ---------- 网盘卡片 ---------- */
.netdisk-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.netdisk-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 24px;
  border-radius: var(--r-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.netdisk-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }
.netdisk-card .nd-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: grid; place-items: center;
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}
.netdisk-card .nd-name { font-weight: 700; color: var(--text-strong); margin-bottom: 4px; }
.netdisk-card .nd-code { color: var(--text-muted); font-size: .88rem; }
.netdisk-card .nd-code b { color: var(--brand-2); font-weight: 700; }
.netdisk-card a.nd-link { margin-left: auto; color: var(--brand-2); font-weight: 600; font-size: .9rem; display: inline-flex; align-items: center; gap: 4px; }
.netdisk-card a.nd-link:hover { text-decoration: underline; }

/* ---------- 须知列表 ---------- */
.notice-list { display: grid; gap: 14px; }
.notice-item {
  display: flex;
  gap: 14px;
  padding: 18px 22px;
  border-radius: var(--r-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-left: 3px solid var(--warning);
}
.notice-item.danger { border-left-color: var(--danger); }
.notice-item.info { border-left-color: var(--info); }
.notice-item.success { border-left-color: var(--success); }
.notice-item .ni-icon { flex-shrink: 0; width: 24px; height: 24px; color: var(--warning); margin-top: 2px; }
.notice-item.danger .ni-icon { color: var(--danger); }
.notice-item.info .ni-icon { color: var(--info); }
.notice-item.success .ni-icon { color: var(--success); }
.notice-item .ni-text { color: var(--text-body); font-size: .95rem; }
.notice-item .ni-text b { color: var(--text-strong); }

/* ---------- 步骤 ---------- */
.steps { display: grid; gap: 18px; }
.step {
  display: flex;
  gap: 18px;
  padding: 22px 24px;
  border-radius: var(--r-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
}
.step .step-no {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-weight: 800;
  color: #fff;
  background: var(--brand-grad);
  box-shadow: var(--shadow-glow);
}
.step h4 { margin-bottom: 4px; color: var(--text-strong); }
.step p { color: var(--text-muted); font-size: .92rem; }

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: 40px;
  background: var(--bg-sunken);
  border-top: 1px solid var(--border);
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand p { color: var(--text-muted); font-size: .92rem; max-width: 320px; }
.footer-col h4 { font-size: .95rem; margin-bottom: 16px; color: var(--text-strong); }
.footer-col ul { display: grid; gap: 10px; }
.footer-col a { color: var(--text-muted); font-size: .92rem; transition: color .2s; }
.footer-col a:hover { color: var(--brand-2); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 22px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: 12px;
  color: var(--text-faint);
  font-size: .85rem;
}
.footer-bottom a { color: var(--text-faint); }
.footer-bottom a:hover { color: var(--brand-2); }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s cubic-bezier(.2,.8,.3,1), transform .7s cubic-bezier(.2,.8,.3,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; }
.reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; }
.reveal.d4 { transition-delay: .32s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-orb { animation: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 24px 24px;
    background: var(--bg-glass);
    backdrop-filter: saturate(180%) blur(18px);
    -webkit-backdrop-filter: saturate(180%) blur(18px);
    border-bottom: 1px solid var(--border);
    transform: translateY(-130%);
    transition: transform .4s cubic-bezier(.2,.8,.3,1);
    z-index: 999;
  }
  .nav-menu.open { transform: translateY(0); }
  .nav-menu a { padding: 14px 8px; border-radius: 0; border-bottom: 1px solid var(--border); }
  .nav-menu a.active::after { display: none; }
  .nav-burger {
    display: inline-flex;
    width: 40px; height: 40px;
    border-radius: 10px;
    align-items: center; justify-content: center;
    background: var(--bg-elevated);
    border: 1px solid var(--border-strong);
    color: var(--text-strong);
  }
  .nav-burger svg { width: 20px; height: 20px; transition: transform .3s; }
  .nav-burger.open svg { transform: rotate(90deg); }

  .grid-2, .grid-3, .grid-4, .stats, .netdisk-grid, .footer-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .hero { padding: calc(var(--nav-h) + 56px) 0 72px; }
  .cta-banner { padding: 40px 24px; }
  .footer-bottom { flex-direction: column; align-items: center; }
}

/* ============================================================
   功能页整合移植：整蛊三栏 + 双栏步骤（原 index.html 内联）
   ============================================================ */
/* 整蛊三栏 */
.trigger-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.trigger-card {
  padding: 28px;
  border-radius: var(--r-lg);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform .35s, box-shadow .35s;
}
.trigger-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.trigger-card .tc-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.trigger-card .tc-num {
  width: 40px; height: 40px; border-radius: 12px; flex-shrink: 0;
  display: grid; place-items: center; color: #fff;
  background: var(--brand-grad); font-weight: 800; box-shadow: var(--shadow-glow);
}
.trigger-card h3 { font-size: 1.15rem; }
.trigger-card ul { display: grid; gap: 8px; margin-top: 14px; }
.trigger-card ul li { position: relative; padding-left: 20px; color: var(--text-body); font-size: .93rem; }
.trigger-card ul li::before {
  content: ''; position: absolute; left: 0; top: 9px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--brand-grad);
}
@media (max-width: 768px) { .trigger-grid { grid-template-columns: 1fr; } }
/* 教程页移植：双栏步骤 */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
@media (max-width: 768px) { .two-col { grid-template-columns: 1fr; } }