/* =========================================================
 * 福星AI 欢迎页 — 与 Dcat Cyber 后台同系视觉
 * ========================================================= */

:root {
    --cyber-bg: #05070b;
    --cyber-bg-2: #080b11;
    --cyber-cyan: #7eb8c9;
    --cyber-text: #9aabbc;
    --cyber-muted: #6a7d90;
    --cyber-border: rgba(130, 170, 195, 0.14);
    --cyber-glow: rgba(120, 180, 200, 0.12);
    --cyber-font: 'Rajdhani', 'Orbitron', 'Courier New', monospace;
    --wc: 126, 184, 201;
    --welcome-panel-bg: rgba(12, 18, 28, 0.72);
    --welcome-title: #e8f4f8;
    --welcome-accent-text: #8de8f5;
    --cyber-cut-md: 11px;
    --cyber-metal-cut: polygon(
        var(--cyber-cut-md) 0,
        calc(100% - var(--cyber-cut-md)) 0,
        100% var(--cyber-cut-md),
        100% calc(100% - var(--cyber-cut-md)),
        calc(100% - var(--cyber-cut-md)) 100%,
        var(--cyber-cut-md) 100%,
        0 calc(100% - var(--cyber-cut-md)),
        0 var(--cyber-cut-md)
    );
}

html.cyber-skin-ember,
body.cyber-theme-ember {
    --cyber-bg: #0a0806;
    --cyber-bg-2: #120e0a;
    --cyber-cyan: #e0a060;
    --cyber-text: #c4b09a;
    --cyber-muted: #9a8570;
    --cyber-border: rgba(200, 150, 100, 0.18);
    --cyber-glow: rgba(224, 160, 96, 0.14);
    --wc: 224, 160, 96;
    --welcome-panel-bg: rgba(28, 18, 12, 0.82);
    --welcome-title: #f5e6d0;
    --welcome-accent-text: #ffc078;
}

html.cyber-skin-light,
body.cyber-theme-light {
    --cyber-bg: #eef2f6;
    --cyber-bg-2: #e4eaef;
    --cyber-cyan: #0891b2;
    --cyber-text: #334155;
    --cyber-muted: #64748b;
    --cyber-border: rgba(8, 145, 178, 0.2);
    --cyber-glow: rgba(8, 145, 178, 0.1);
    --wc: 8, 145, 178;
    --welcome-panel-bg: rgba(255, 255, 255, 0.88);
    --welcome-title: #0f172a;
    --welcome-accent-text: #0891b2;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    min-height: 100%;
}

body.cyber-welcome {
    font-family: var(--cyber-font);
    background: var(--cyber-bg) !important;
    color: var(--cyber-text);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* 顶栏扫描光边（同后台 cyber-scan-ready） */
html.cyber-scan-ready::before {
    content: '';
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 2px;
    z-index: 1000;
    pointer-events: none;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(var(--wc), 0.35) 18%,
        rgba(var(--wc), 0.85) 50%,
        rgba(255, 60, 100, 0.28) 72%,
        transparent 100%
    );
    box-shadow: 0 0 14px rgba(var(--wc), 0.35);
    opacity: 0.82;
}

/* 几何粒子 canvas */
#cyber-fx-canvas {
    position: fixed !important;
    inset: 0;
    width: 100% !important;
    height: 100% !important;
    z-index: 0 !important;
    pointer-events: none !important;
    opacity: 0.88;
}

/* HUD 网格底纹 */
.cyber-welcome-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        linear-gradient(rgba(var(--wc), 0.028) 1px, transparent 1px),
        linear-gradient(90deg, rgba(var(--wc), 0.028) 1px, transparent 1px);
    background-size: 28px 28px;
    mask-image: radial-gradient(ellipse 92% 58% at 50% 0%, #000 18%, transparent 74%);
    -webkit-mask-image: radial-gradient(ellipse 92% 58% at 50% 0%, #000 18%, transparent 74%);
}

/* 四角 HUD 框 */
.cyber-welcome-frame {
    position: fixed;
    left: 16px;
    right: 16px;
    top: 16px;
    bottom: 16px;
    z-index: 1;
    pointer-events: none;
    border: 1px solid rgba(var(--wc), 0.08);
    border-radius: 6px;
}

.cyber-panel-corner {
    position: absolute;
    width: 22px;
    height: 22px;
    border-color: rgba(var(--wc), 0.42);
    opacity: 0.7;
}
.cyber-panel-corner.tl { top: -1px; left: -1px; border-top: 1px solid; border-left: 1px solid; }
.cyber-panel-corner.tr { top: -1px; right: -1px; border-top: 1px solid; border-right: 1px solid; }
.cyber-panel-corner.bl { bottom: -1px; left: -1px; border-bottom: 1px solid; border-left: 1px solid; }
.cyber-panel-corner.br { bottom: -1px; right: -1px; border-bottom: 1px solid; border-right: 1px solid; }

/* 右下角状态 HUD */
#cyber-status-hud {
    position: fixed;
    right: 28px;
    bottom: 18px;
    z-index: 3;
    pointer-events: none;
    font-family: 'Orbitron', monospace;
    font-size: 9px;
    letter-spacing: 0.16em;
    color: rgba(var(--wc), 0.45);
    display: flex;
    align-items: center;
    gap: 8px;
}
#cyber-status-hud .dot {
    width: 6px;
    height: 6px;
    background: rgba(80, 220, 140, 0.85);
    box-shadow: 0 0 8px rgba(80, 220, 140, 0.4);
    border-radius: 50%;
    animation: cyber-blink 1.6s steps(1) infinite;
}
@keyframes cyber-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.35; }
}

/* 主内容 */
.cyber-welcome-main {
    position: relative;
    z-index: 2;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
}

.cyber-welcome-inner {
    text-align: center;
    max-width: 920px;
    width: 100%;
}

.version-badge {
    display: inline-block;
    padding: 4px 16px;
    margin-bottom: 20px;
    font-size: 11px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(var(--wc), 0.75);
    background: rgba(var(--wc), 0.06);
    border: 1px solid rgba(var(--wc), 0.22);
    clip-path: var(--cyber-metal-cut);
}

.logo-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 18px;
    margin-bottom: 28px;
}

.logo-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(var(--wc), 0.92);
    background: linear-gradient(160deg, rgba(var(--wc), 0.18), rgba(var(--wc), 0.06));
    border: 1px solid rgba(var(--wc), 0.35);
    clip-path: var(--cyber-metal-cut);
    box-shadow: 0 0 24px rgba(var(--wc), 0.15);
}

.logo-icon .logo-mark {
    width: 46px;
    height: 46px;
    filter: drop-shadow(0 0 6px rgba(var(--wc), 0.35));
}

.logo-text {
    font-family: 'Orbitron', var(--cyber-font);
    font-size: 40px;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: rgba(var(--wc), 0.95);
    text-shadow: 0 0 20px rgba(var(--wc), 0.25);
}
.logo-text span {
    color: var(--welcome-accent-text);
}

.main-title {
    font-family: 'Orbitron', var(--cyber-font);
    font-size: clamp(28px, 5vw, 48px);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 14px;
    letter-spacing: 0.04em;
    color: var(--welcome-title);
}

.main-title .highlight {
    color: var(--cyber-cyan);
    text-shadow: 0 0 16px rgba(var(--wc), 0.35);
}

.sub-title {
    font-size: 17px;
    line-height: 1.75;
    color: var(--cyber-muted);
    max-width: 580px;
    margin: 0 auto 36px;
    letter-spacing: 0.02em;
}

.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    margin-bottom: 36px;
}

.feature-card {
    position: relative;
    padding: 24px 20px;
    text-align: center;
    background: var(--welcome-panel-bg);
    border: 1px solid rgba(var(--wc), 0.2);
    clip-path: var(--cyber-metal-cut);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease, background 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(var(--wc), 0.45);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35), 0 0 20px rgba(var(--wc), 0.12);
    background: linear-gradient(
        165deg,
        rgba(var(--wc), 0.12) 0%,
        var(--welcome-panel-bg) 55%
    );
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 18px;
    right: 18px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(var(--wc), 0.45), transparent);
    opacity: 0.6;
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    margin: 0 auto 12px;
    color: rgba(var(--wc), 0.88);
    filter: drop-shadow(0 0 8px rgba(var(--wc), 0.25));
}

.feature-icon svg {
    width: 36px;
    height: 36px;
}

.feature-title {
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(var(--wc), 0.92);
    margin-bottom: 6px;
}

.feature-desc {
    font-size: 13px;
    line-height: 1.55;
    color: var(--cyber-muted);
}

.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
    margin-bottom: 32px;
}

.btn {
    display: inline-block;
    padding: 13px 36px;
    font-family: var(--cyber-font);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
    clip-path: var(--cyber-metal-cut);
}

.btn-primary {
    color: #061018;
    background: rgba(var(--wc), 0.88);
    border: 1px solid rgba(var(--wc), 0.55);
    box-shadow: 0 0 16px rgba(var(--wc), 0.25);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 28px rgba(var(--wc), 0.4);
    color: #061018;
}

.btn-secondary {
    color: rgba(var(--wc), 0.9);
    background: rgba(var(--wc), 0.06);
    border: 1px solid rgba(var(--wc), 0.28);
}
.btn-secondary:hover {
    background: rgba(var(--wc), 0.14);
    transform: translateY(-2px);
    color: rgba(var(--wc), 1);
}

.footer {
    font-size: 12px;
    letter-spacing: 0.08em;
    color: rgba(var(--wc), 0.35);
}
.footer a {
    color: rgba(var(--wc), 0.55);
    text-decoration: none;
}
.footer a:hover {
    color: rgba(var(--wc), 0.85);
}

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--cyber-bg); }
::-webkit-scrollbar-thumb {
    background: rgba(var(--wc), 0.35);
    border-radius: 0;
}

@media (max-width: 768px) {
    .features { grid-template-columns: repeat(2, 1fr); }
    .logo-text { font-size: 28px; }
    .cyber-welcome-frame { left: 8px; right: 8px; top: 8px; bottom: 8px; }
}

@media (max-width: 480px) {
    .features { grid-template-columns: 1fr; }
    .logo-wrapper { flex-direction: column; gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
    #cyber-fx-canvas { display: none !important; }
    #cyber-status-hud .dot { animation: none; }
}