/* ============================================================
   we.css —— 全局框架对齐 main.css（Apple Tahoe 液态玻璃主题）
   业务类：.about-wrapper / .about-card / .about-title / .about-desc /
           .about-features / .feature-item / .download-rules /
           .rules-* / .sponsor-call / .sponsor-btn 均保持原样语义；
   框架层对齐玻璃主题。
   ============================================================ */

/* ========== 玻璃主题变量（与 main.css 一致） ========== */
:root {
  --g-bg-glass: rgba(255, 255, 255, 0.18);
  --g-bg-glass-dark: rgba(20, 30, 48, 0.35);
  --g-blur: 16px;
  --g-saturate: 200%;
  --g-border: rgba(255, 255, 255, 0.4);
  --g-border-dark: rgba(255, 255, 255, 0.12);
  --g-shadow: 0 8px 32px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
  --g-shadow-dark: 0 8px 32px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(0, 0, 0, 0.15);
  --g-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.7), inset 0 -1px 0 rgba(255, 255, 255, 0.2);
  --g-highlight-dark: inset 0 1px 0 rgba(255, 255, 255, 0.25), inset 0 -1px 0 rgba(0, 0, 0, 0.2);
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --primary: #6366f1;
  --primary-light: #a5b4fc;
  --primary-dark: #4f46e5;
  --secondary: #38bdf8;
  --dark: var(--text-primary);
  --light: #ffffff;
  --light-dark: #f1f5f9;
  --gray: var(--text-secondary);
  --gray-light: #cbd5e1;
  --gray-dark: #475569;
  --border: var(--g-border);
  --shadow: var(--g-shadow);
  --shadow-light: 0 2px 8px rgba(0,0,0,0.02);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
  --bg-main: #f8fafc;
  --bg-header: var(--g-bg-glass);
  --bg-card: var(--g-bg-glass);
  --border-color: #e2e8f0;
  --gray-color: #64748b;
  --card-secondary-bg: rgba(30,41,59,0.5);
  --card-tertiary-bg: rgba(15,23,42,0.5);
}

body.dark {
  --g-bg-glass: var(--g-bg-glass-dark);
  --g-border: var(--g-border-dark);
  --g-highlight: var(--g-highlight-dark);
  --g-shadow: var(--g-shadow-dark);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --bg-main: #0b1120;
  --light: #1e293b;
  --light-dark: #334155;
  --gray-light: #475569;
  --border-color: #334155;
  --gray-color: #94a3b8;
}

/* ========== 基础重置 ========== */
* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif; }

/* ========== body：环境光径向渐变背景 ========== */
body {
  background-color: var(--bg-main);
  background-image:
    radial-gradient(circle at 20% 30%, rgba(80, 120, 255, 0.12) 0%, transparent 600px),
    radial-gradient(circle at 80% 70%, rgba(200, 80, 220, 0.08) 0%, transparent 600px);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  transition: var(--transition);
  padding-top: 100px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ========== 玻璃工具类 ========== */
.glass-effect { position: relative; isolation: isolate; overflow: hidden; background: var(--g-bg-glass); backdrop-filter: blur(var(--g-blur)) saturate(var(--g-saturate)); -webkit-backdrop-filter: blur(var(--g-blur)) saturate(var(--g-saturate)); border: 1px solid var(--g-border); box-shadow: var(--g-shadow), var(--g-highlight); transition: var(--transition); }
.glass-effect::after { content: ''; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; background: radial-gradient(ellipse at 50% -20%, rgba(255,255,255,0.4) 0%, transparent 70%); mix-blend-mode: overlay; opacity: 0.6; animation: liquid-shine 6s ease-in-out infinite alternate; }
@keyframes liquid-shine { 0% { transform: translateX(-20%) translateY(-10%); } 100% { transform: translateX(20%) translateY(10%); } }
body.dark .glass-effect::after { opacity: 0.3; }

/* ========== 顶部导航栏 – 居中胶囊 ========== */
header { position: fixed; top: 16px; left: 50%; transform: translateX(-50%); width: min(960px, 94%); border-radius: 999px; z-index: 1000; padding: 0 18px; display: flex; align-items: center; justify-content: space-between; height: 56px; background: var(--g-bg-glass); backdrop-filter: blur(var(--g-blur)) saturate(var(--g-saturate)); -webkit-backdrop-filter: blur(var(--g-blur)) saturate(var(--g-saturate)); border: 1px solid var(--g-border); box-shadow: var(--g-shadow), var(--g-highlight); transition: var(--transition); isolation: isolate; overflow: hidden; }
header:hover { box-shadow: 0 12px 40px rgba(0,0,0,0.12), var(--g-highlight); transform: translateX(-50%) translateY(-1px); }
header .logo-link { display: flex; align-items: center; height: 100%; text-decoration: none; background: transparent; padding: 6px 10px; border-radius: 999px; transition: background 0.2s; flex-shrink: 0; }
header .logo-link:hover { background: rgba(255,255,255,0.1); }
header .logo-img { height: 38px; max-width: 130px; border-radius: var(--radius-sm); display: block; transition: transform 0.3s ease, filter 0.3s ease; filter: brightness(0) saturate(100%); -webkit-filter: brightness(0) saturate(100%); }
header .logo-img:hover { transform: scale(1.04); filter: brightness(0.3) saturate(100%); -webkit-filter: brightness(0.3) saturate(100%); }
body.dark header .logo-img { filter: brightness(0) invert(1) saturate(100%); -webkit-filter: brightness(0) invert(100%); }
body.dark header .logo-img:hover { filter: brightness(0.3) invert(1) saturate(100%); -webkit-filter: brightness(0.3) invert(100%); }
body.dark header .logo-link:hover { background: rgba(255,255,255,0.05); }

.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a { color: var(--text-secondary); text-decoration: none; font-weight: 480; font-size: 0.88rem; letter-spacing: 0.1px; transition: var(--transition); padding: 6px 14px; border-radius: 999px; white-space: nowrap; display: inline-flex; align-items: center; gap: 6px; position: relative; z-index: 2; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: rgba(99,102,241,0.10); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); box-shadow: inset 0 1px 0 rgba(255,255,255,0.3); }

/* ========== 主题切换按钮 – 圆形玻璃 ========== */
.theme-toggle { background: transparent; border: 1px solid var(--g-border); border-radius: 50%; width: 34px; height: 34px; display: flex !important; align-items: center; justify-content: center; color: var(--text-secondary); font-size: 1rem; line-height: 1; cursor: pointer; transition: var(--transition); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); box-shadow: var(--g-highlight); overflow: visible; margin: 0 4px; flex-shrink: 0; }
.theme-toggle:hover { background: rgba(255,255,255,0.15); color: var(--primary); border-color: var(--primary); transform: scale(1.06); }
body.dark .theme-toggle:hover { background: rgba(255,255,255,0.05); }

/* ========== 底部信息栏 – 玻璃 ========== */
.footer { text-align: center; padding: 34px 24px 28px; color: var(--text-muted); font-size: 0.83rem; margin-top: 44px; transition: var(--transition); background: var(--g-bg-glass); backdrop-filter: blur(var(--g-blur)) saturate(var(--g-saturate)); -webkit-backdrop-filter: blur(var(--g-blur)) saturate(var(--g-saturate)); border-top: 1px solid var(--g-border); box-shadow: var(--g-highlight); position: relative; isolation: isolate; }
.footer-links a { color: var(--primary); text-decoration: none; margin: 0 12px; transition: color 0.2s; font-weight: 440; }
.footer-links a:hover { color: var(--secondary); text-decoration: underline; }
.copyright { margin-top: 8px; color: var(--text-muted); font-size: 0.78rem; line-height: 1.6; }

/* ========== 关于我们主体内容（业务类保持原样语义，玻璃化） ========== */
.about-wrapper { max-width: 900px; width: 90%; margin: 0 auto; padding: 20px 0 60px; }

.about-card { background: var(--g-bg-glass); backdrop-filter: blur(var(--g-blur)) saturate(var(--g-saturate)); -webkit-backdrop-filter: blur(var(--g-blur)) saturate(var(--g-saturate)); border: 1px solid var(--g-border); box-shadow: var(--g-shadow), var(--g-highlight); border-radius: var(--radius-md); padding: 40px; margin-bottom: 30px; transition: var(--transition); }

.about-title { font-size: 2rem; font-weight: 700; color: var(--text-primary); margin-bottom: 24px; padding-bottom: 12px; border-bottom: 2px solid var(--g-border); display: flex; align-items: center; gap: 12px; }
.about-title i { color: var(--primary); font-size: 1.8rem; }

.about-desc { font-size: 1.1rem; color: var(--text-primary); margin-bottom: 30px; line-height: 1.8; }

.about-features { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; margin-bottom: 30px; }

.feature-item { display: flex; flex-direction: column; align-items: center; text-align: center; padding: 20px; background: rgba(248,250,252,0.5); border-radius: var(--radius-md); border: 1px solid var(--g-border); backdrop-filter: blur(6px); transition: var(--transition); }
body.dark .feature-item { background: var(--card-secondary-bg); }
.feature-icon { font-size: 2.5rem; color: var(--primary); margin-bottom: 16px; }
.feature-title { font-size: 1.2rem; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
.feature-desc { font-size: 0.95rem; color: var(--text-secondary); line-height: 1.6; }

.download-rules { background: rgba(241,245,249,0.6); border-radius: var(--radius-md); padding: 24px; margin-bottom: 30px; border-left: 4px solid var(--primary); border: 1px solid var(--g-border); backdrop-filter: blur(6px); }
body.dark .download-rules { background: var(--card-tertiary-bg); }

.rules-title { font-size: 1.3rem; font-weight: 600; margin-bottom: 16px; color: var(--text-primary); display: flex; align-items: center; gap: 8px; }
.rules-title i { color: var(--primary); }
.rules-list { list-style: none; gap: 12px; display: flex; flex-direction: column; }
.rules-list li { font-size: 1rem; color: var(--text-primary); display: flex; align-items: flex-start; gap: 10px; }
.rules-list li i { color: var(--primary); margin-top: 6px; flex-shrink: 0; }

/* ========== 赞助区块 & VIP按钮（业务类保持原样，渐变对齐新主色） ========== */
.sponsor-call { text-align: center; padding: 36px 30px; background: linear-gradient(135deg, rgba(99,102,241,0.08) 0%, rgba(56,189,248,0.08) 100%); border-radius: var(--radius-md); margin-bottom: 20px; border: 1px solid var(--g-border); backdrop-filter: blur(6px); }
.sponsor-btn { display: inline-block; padding: 14px 36px; background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #ffffff; text-decoration: none; border-radius: var(--radius-sm); font-weight: 700; font-size: 1.1rem; transition: var(--transition); border: none; cursor: pointer; box-shadow: 0 4px 14px rgba(99,102,241,0.25); }
.sponsor-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(99,102,241,0.35); }

/* ========== 暗色模式赞助区块适配 ========== */
body.dark .sponsor-call { background: linear-gradient(135deg, rgba(30,41,59,0.7) 0%, rgba(15,23,42,0.7) 100%); border-color: var(--border-color); }
body.dark .sponsor-btn { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #ffffff; box-shadow: 0 4px 16px rgba(99,102,241,0.4); }

/* ========== 暗色内容区块适配 ========== */
body.dark .highlight { background: #854d0e; color: #fef3c7; }

/* ========== 响应式 ========== */
@media (max-width: 930px) { .nav-links a { font-size: 0.84rem; padding: 6px 10px; } header .logo-img { height: 36px; } }
@media (max-width: 900px) { .nav-links { display: none; } .about-features { grid-template-columns: 1fr; } }
@media (max-width: 610px) { .nav-links a span { display: none; } .nav-links a { padding: 6px 8px; font-size: 1.05rem; } }
@media (max-width: 505px) {
  body { padding-top: 94px; }
  header { height: 52px; padding: 0 12px; top: 12px; }
  header .logo-img { height: 32px; max-width: 108px; }
  .about-wrapper { padding: 12px 0 40px; }
  .about-card { padding: 24px; }
  .about-title { font-size: 1.6rem; }
  .about-desc { font-size: 1rem; }
  .sponsor-title { font-size: 1.3rem; }
  .sponsor-btn { padding: 12px 24px; font-size: 1rem; }
}