/* ========================================
   Clash Verge 官网 - 全新设计系统
   ======================================== */

/* ---- CSS Variables ---- */
:root {
    --bg-primary: #080b12;
    --bg-secondary: #0f1621;
    --bg-card: rgba(255,255,255,0.03);
    --bg-card-hover: rgba(255,255,255,0.06);
    --border: rgba(255,255,255,0.06);
    --border-hover: rgba(255,255,255,0.12);
    --text-primary: #eceef3;
    --text-secondary: #8892a6;
    --text-muted: #5a6275;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --accent-glow: rgba(59,130,246,0.25);
    --green: #22c55e;
    --green-glow: rgba(34,197,94,0.25);
    --orange: #f59e0b;
    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow: 0 4px 24px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 48px rgba(0,0,0,0.5);
    --transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
}

/* ---- Reset ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ---- Noise & Gradient Overlay ---- */
.bg-layer {
    position: fixed; inset: 0; z-index: -2; pointer-events: none;
    background:
        radial-gradient(ellipse 80% 60% at 50% -10%, rgba(59,130,246,0.08), transparent),
        radial-gradient(ellipse 60% 50% at 90% 50%, rgba(34,197,94,0.04), transparent),
        radial-gradient(ellipse 50% 50% at 10% 80%, rgba(59,130,246,0.05), transparent);
}

.bg-grid {
    position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: 0.4;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black, transparent);
}

/* ---- Navbar ---- */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    padding: 0 32px; height: 64px;
    display: flex; align-items: center; justify-content: space-between;
    background: rgba(8,11,18,0.85); backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}
.nav-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-logo {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--accent), #6366f1);
    border-radius: 10px; display: flex; align-items: center; justify-content: center;
    font-size: 18px; color: #fff;
    box-shadow: 0 0 20px var(--accent-glow);
}
.nav-name {
    font-size: 18px; font-weight: 700; color: var(--text-primary);
    letter-spacing: -0.3px;
}
.nav-links { display: flex; gap: 4px; }
.nav-link {
    padding: 8px 18px; border-radius: 8px; font-size: 14px; font-weight: 500;
    color: var(--text-secondary); text-decoration: none; transition: var(--transition);
}
.nav-link:hover { color: var(--text-primary); background: var(--bg-card-hover); }
.nav-link.active { color: var(--accent-light); background: var(--bg-card); }

/* ---- Container ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 32px; }

/* ---- Hero ---- */
.hero {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    padding: 120px 32px 100px; position: relative;
}
.hero-glow {
    position: absolute; width: 600px; height: 600px;
    background: radial-gradient(circle, var(--accent-glow), transparent 70%);
    top: 50%; left: 50%; transform: translate(-50%, -50%);
    pointer-events: none; animation: heroGlow 6s ease-in-out infinite;
}
@keyframes heroGlow {
    0%, 100% { opacity: 0.5; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 1; transform: translate(-50%, -50%) scale(1.15); }
}
.hero-inner { max-width: 780px; text-align: center; position: relative; z-index: 1; }
.hero-chip {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 6px 18px; border: 1px solid var(--border);
    border-radius: 50px; font-size: 13px; font-weight: 500;
    color: var(--green); background: rgba(34,197,94,0.08);
    margin-bottom: 32px; letter-spacing: 0.2px;
    animation: fadeUp 0.6s ease-out;
}
.hero-chip-dot {
    width: 7px; height: 7px; background: var(--green); border-radius: 50%;
    box-shadow: 0 0 8px var(--green-glow); animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 4px var(--green-glow); }
    50% { box-shadow: 0 0 14px var(--green-glow); }
}
.hero-title {
    font-size: clamp(44px, 8vw, 72px); font-weight: 800;
    line-height: 1.08; letter-spacing: -1.5px; margin-bottom: 24px;
    animation: fadeUp 0.6s ease-out 0.1s both;
}
.hero-title .hl {
    background: linear-gradient(135deg, #fff 20%, var(--accent-light) 60%, #818cf8);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-desc {
    font-size: 18px; color: var(--text-secondary); max-width: 580px;
    margin: 0 auto 40px; line-height: 1.7;
    animation: fadeUp 0.6s ease-out 0.2s both;
}
.hero-actions {
    display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
    animation: fadeUp 0.6s ease-out 0.3s both;
}
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 28px; font-size: 15px; font-weight: 600;
    border-radius: 12px; text-decoration: none; border: none;
    cursor: pointer; transition: var(--transition); white-space: nowrap;
}
.btn-accent {
    background: var(--accent); color: #fff;
    box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-accent:hover { background: #2563eb; transform: translateY(-2px); box-shadow: 0 8px 30px var(--accent-glow); }
.btn-outline {
    background: transparent; color: var(--text-primary);
    border: 1px solid var(--border); backdrop-filter: blur(8px);
}
.btn-outline:hover { border-color: var(--border-hover); background: var(--bg-card-hover); transform: translateY(-2px); }
.btn-lg { padding: 18px 36px; font-size: 17px; border-radius: 14px; }
.btn-icon { font-size: 1.1em; }

/* ---- Stats ---- */
.stats { padding: 80px 0 60px; }
.stats-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
    background: var(--border); border-radius: var(--radius-lg); overflow: hidden;
}
.stat-item {
    background: var(--bg-secondary); padding: 36px 24px; text-align: center;
    transition: var(--transition);
}
.stat-item:hover { background: var(--bg-card-hover); }
.stat-num {
    font-size: 32px; font-weight: 700; color: var(--accent-light); margin-bottom: 6px;
}
.stat-lbl { font-size: 13px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; }

/* ---- Sections ---- */
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
    display: inline-block; padding: 5px 14px; border: 1px solid var(--border);
    border-radius: 50px; font-size: 12px; font-weight: 600; color: var(--accent-light);
    background: rgba(59,130,246,0.08); text-transform: uppercase; letter-spacing: 1.5px;
    margin-bottom: 16px;
}
.section-title {
    font-size: clamp(30px, 5vw, 42px); font-weight: 700; margin-bottom: 14px;
    letter-spacing: -0.8px;
}
.section-desc { font-size: 17px; color: var(--text-secondary); max-width: 560px; margin: 0 auto; }

/* ---- Feature Cards ---- */
.features-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 20px;
}
.feat-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 32px; transition: var(--transition);
    position: relative; overflow: hidden;
}
.feat-card::after {
    content: ''; position: absolute; inset: 0; border-radius: var(--radius-lg);
    opacity: 0; transition: opacity 0.3s;
    background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(59,130,246,0.07), transparent 60%);
}
.feat-card:hover { border-color: var(--border-hover); transform: translateY(-4px); box-shadow: var(--shadow); }
.feat-card:hover::after { opacity: 1; }
.feat-card-icon {
    width: 48px; height: 48px; border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; margin-bottom: 20px;
    background: linear-gradient(135deg, rgba(59,130,246,0.15), rgba(99,102,241,0.1));
    border: 1px solid rgba(59,130,246,0.2);
}
.feat-card h3 { font-size: 18px; font-weight: 600; margin-bottom: 10px; }
.feat-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.65; }

/* ---- Comparison Table ---- */
.compare { padding: 100px 0; }
.table-wrap {
    border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden;
    background: var(--bg-card);
}
.table-row {
    display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr;
    padding: 20px 28px; align-items: center; font-size: 14px;
    border-bottom: 1px solid var(--border); transition: var(--transition);
}
.table-row:last-child { border-bottom: none; }
.table-row.head {
    background: var(--bg-secondary); font-weight: 600;
    color: var(--text-primary); font-size: 13px; text-transform: uppercase; letter-spacing: 0.5px;
}
.table-row:hover:not(.head) { background: var(--bg-card-hover); }
.table-row .check { color: var(--green); font-weight: 600; }
.table-row .dash { color: var(--text-muted); }
.table-row .highlight { color: var(--accent-light); }

/* ---- Download Page ---- */
.dl-page { min-height: 100vh; padding: 140px 32px 80px; }
.dl-content { max-width: 720px; margin: 0 auto; text-align: center; }
.dl-logo {
    width: 100px; height: 100px; margin: 0 auto 28px;
    background: linear-gradient(135deg, var(--accent), #6366f1);
    border-radius: 24px; display: flex; align-items: center; justify-content: center;
    font-size: 48px; box-shadow: 0 0 40px var(--accent-glow);
}
.dl-title { font-size: 40px; font-weight: 700; margin-bottom: 10px; letter-spacing: -0.8px; }
.dl-sub { font-size: 17px; color: var(--text-secondary); margin-bottom: 48px; }

/* Platform Tabs */
.platform-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 28px; }
.platform-tab {
    padding: 10px 22px; border-radius: 10px; font-size: 14px; font-weight: 500;
    color: var(--text-secondary); background: transparent;
    border: 1px solid var(--border); cursor: pointer; transition: var(--transition);
    display: flex; align-items: center; gap: 6px;
}
.platform-tab:hover { border-color: var(--border-hover); color: var(--text-primary); }
.platform-tab.active { background: rgba(59,130,246,0.12); border-color: rgba(59,130,246,0.3); color: var(--accent-light); }

/* Download Card */
.dl-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 40px; margin-bottom: 28px;
}
.dl-ver {
    display: inline-block; padding: 6px 16px;
    background: linear-gradient(135deg, rgba(34,197,94,0.12), rgba(59,130,246,0.08));
    border: 1px solid rgba(34,197,94,0.2); border-radius: 50px;
    font-size: 13px; font-weight: 600; color: var(--green); margin-bottom: 28px;
}
.dl-info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 32px; text-align: left; margin-bottom: 32px; }
.dl-info-item { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--border); font-size: 14px; }
.dl-info-item:last-child, .dl-info-item:nth-last-child(2):nth-child(odd) { border-bottom: none; }
.dl-info-lbl { color: var(--text-muted); }
.dl-info-val { color: var(--text-primary); font-weight: 500; }
.dl-btn { width: 100%; justify-content: center; font-size: 17px; font-weight: 600; }
.dl-back { margin-top: 28px; font-size: 14px; }
.dl-back a { color: var(--text-muted); text-decoration: none; transition: var(--transition); }
.dl-back a:hover { color: var(--text-primary); }

/* ---- 404 Page ---- */
.e404-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 120px 32px 80px; }
.e404-inner { text-align: center; max-width: 500px; }
.e404-icon { display: block; font-size: 90px; margin-bottom: 8px; animation: float404 3s ease-in-out infinite; }
@keyframes float404 {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-12px) rotate(-3deg); }
    75% { transform: translateY(6px) rotate(3deg); }
}
.e404-code {
    font-size: clamp(100px, 20vw, 160px); font-weight: 800; line-height: 1;
    background: linear-gradient(180deg, var(--accent-light) 0%, #6366f1 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text; margin-bottom: 12px;
}
.e404-title { font-size: 26px; font-weight: 600; margin-bottom: 12px; }
.e404-desc { font-size: 16px; color: var(--text-secondary); margin-bottom: 36px; }
.e404-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---- Footer ---- */
.footer {
    padding: 48px 32px; text-align: center;
    border-top: 1px solid var(--border); color: var(--text-muted); font-size: 13px;
}
.footer a { color: var(--accent-light); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .navbar { padding: 0 20px; }
    .nav-link { padding: 6px 12px; font-size: 13px; }
    .hero { padding: 100px 20px 80px; }
    .hero-desc { font-size: 15px; }
    .hero-actions { flex-direction: column; align-items: center; }
    .hero-actions .btn { width: 100%; max-width: 300px; justify-content: center; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .features-grid { grid-template-columns: 1fr; }
    .section { padding: 60px 0; }
    .table-row { grid-template-columns: 1.5fr 0.8fr 0.8fr 0.8fr; padding: 14px 16px; font-size: 12px; }
    .dl-info-grid { grid-template-columns: 1fr; }
    .dl-card { padding: 24px; }
    .platform-tabs { flex-wrap: wrap; }
}
@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .table-row { font-size: 11px; padding: 10px; }
}

/* ---- Page Transition ---- */
.page-in { animation: pageIn 0.45s ease-out; }
@keyframes pageIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }

/* ---- Scroll Animations ---- */
.reveal { opacity: 0; transform: translateY(40px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }