:root {
    --bg-deep: #050810;
    --bg-mid: #0c1222;
    --accent: #f97316;
    --accent-soft: rgba(249, 115, 22, 0.45);
    --cyan: #38bdf8;
    --cyan-soft: rgba(56, 189, 248, 0.25);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --glass: rgba(15, 23, 42, 0.55);
    --glass-border: rgba(148, 163, 184, 0.12);
    --mouse-x: 50%;
    --mouse-y: 40%;
}

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

html { scroll-behavior: smooth; }

body.portal-body {
    min-height: 100vh;
    min-height: 100dvh;
    background: var(--bg-deep);
    color: var(--text-primary);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    padding-top: env(safe-area-inset-top, 0);
}

/* 鼠标聚光 */
.portal-spotlight {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background:
        radial-gradient(600px circle at var(--mouse-x) var(--mouse-y), rgba(56, 189, 248, 0.09), transparent 45%),
        radial-gradient(500px circle at var(--mouse-x) var(--mouse-y), rgba(249, 115, 22, 0.06), transparent 40%),
        linear-gradient(180deg, var(--bg-mid) 0%, var(--bg-deep) 55%, #030508 100%);
}

#portal-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.85;
}

.portal-main {
    position: relative;
    z-index: 1;
    flex: 1;
    width: 100%;
    max-width: 1080px;
    margin: 0 auto;
    padding: clamp(3rem, 8vh, 5.5rem) 1.5rem 4rem;
}

/* Hero */
.portal-hero {
    text-align: center;
    margin-bottom: clamp(2.5rem, 6vh, 4rem);
    animation: portalFadeUp 0.9s ease-out both;
}

.portal-logo {
    display: block;
    width: auto;
    height: 72px;
    max-width: 100%;
    margin: 0 auto 1.25rem;
    object-fit: contain;
    box-shadow: 0 0 40px rgba(56, 189, 248, 0.15);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.portal-hero:hover .portal-logo {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 0 50px rgba(249, 115, 22, 0.2);
}

.portal-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.9rem;
    margin-bottom: 1.25rem;
    font-size: 0.75rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--cyan);
    background: rgba(56, 189, 248, 0.08);
    border: 1px solid rgba(56, 189, 248, 0.22);
    border-radius: 999px;
}

.portal-badge::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 10px var(--cyan);
    animation: portalPulse 2s ease-in-out infinite;
}

.portal-title {
    font-size: clamp(1.75rem, 5vw, 2.75rem);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: 0.04em;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, #fff 0%, #e2e8f0 45%, var(--accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.portal-tagline {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--text-secondary);
    font-weight: 300;
    letter-spacing: 0.2em;
    margin-bottom: 2rem;
}

/* 简介 */
.portal-about {
    display: grid;
    gap: 1rem;
    max-width: 680px;
    margin: 0 auto 3.5rem;
    animation: portalFadeUp 0.9s ease-out 0.15s both;
}

.portal-about p {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--text-secondary);
    text-align: center;
}

.portal-about .highlight {
    color: var(--text-primary);
    font-weight: 500;
}

.portal-pills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.6rem;
    margin-top: 0.5rem;
}

.portal-pill {
    padding: 0.4rem 0.85rem;
    font-size: 0.8rem;
    color: #cbd5e1;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    backdrop-filter: blur(8px);
}

/* 产品区 */
.portal-section-label {
    text-align: center;
    font-size: 0.8rem;
    letter-spacing: 0.25em;
    color: var(--accent);
    margin-bottom: 1.5rem;
    animation: portalFadeUp 0.9s ease-out 0.25s both;
}

.portal-products {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    max-width: 720px;
    margin: 0 auto;
}

.product-card {
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 1.75rem 1.5rem;
    text-decoration: none;
    color: inherit;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    backdrop-filter: blur(12px);
    overflow: hidden;
    transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
    animation: portalFadeUp 0.9s ease-out both;
}

.product-card:nth-child(1) { animation-delay: 0.35s; }
.product-card:nth-child(2) { animation-delay: 0.45s; }

.product-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(400px circle at var(--card-x, 50%) var(--card-y, 50%), rgba(56, 189, 248, 0.12), transparent 55%);
    opacity: 0;
    transition: opacity 0.35s ease;
    pointer-events: none;
}

.product-card:hover {
    transform: translateY(-6px);
    border-color: rgba(249, 115, 22, 0.35);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35), 0 0 30px rgba(249, 115, 22, 0.08);
}

.product-card:hover::before { opacity: 1; }

.product-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 1.35rem;
    border-radius: 12px;
    background: rgba(249, 115, 22, 0.12);
    color: var(--accent);
    border: 1px solid rgba(249, 115, 22, 0.2);
}

.product-card.zhixun .product-icon {
    background: rgba(56, 189, 248, 0.12);
    color: var(--cyan);
    border-color: rgba(56, 189, 248, 0.25);
}

.product-name {
    font-size: 1.35rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    letter-spacing: 0.08em;
}

.product-desc {
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--text-secondary);
    flex: 1;
}

.product-arrow {
    margin-top: 1.25rem;
    font-size: 0.85rem;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    transition: gap 0.25s ease;
}

.product-card.zhixun .product-arrow { color: var(--cyan); }

.product-card:hover .product-arrow { gap: 0.6rem; }

@keyframes portalFadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes portalPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

@media (max-width: 600px) {
    .portal-tagline { letter-spacing: 0.12em; }
    .portal-products { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
    .portal-hero, .portal-about, .portal-section-label, .product-card {
        animation: none;
    }
    #portal-canvas { display: none; }
}