/* ============================ 首页样式 ============================ */

/* ---------- HERO ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(var(--nav-h) + 40px) 0 60px;
    position: relative;
}

.hero-content {
    max-width: 880px;
}

.hero-title {
    font-size: clamp(2.4rem, 6vw, 4.4rem);
    font-weight: 700;
    line-height: 1.1;
    margin: 8px 0 24px;
    letter-spacing: -0.02em;
}

.typed {
    color: var(--accent-2);
}

.cursor {
    color: var(--accent);
    animation: blink 1s steps(2) infinite;
    font-weight: 400;
    margin-left: 2px;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-subtitle {
    color: var(--text-dim);
    font-size: clamp(1rem, 1.6vw, 1.18rem);
    max-width: 620px;
    line-height: 1.8;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 80px;
}

.hero-scroll {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    color: var(--text-mute);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 20px;
    background: var(--accent);
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { transform: translateY(-20px); opacity: 0; }
    50% { opacity: 1; }
    100% { transform: translateY(50px); opacity: 0; }
}

/* ---------- 三大方向 ---------- */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.08), transparent 50%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

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

.feature-icon {
    font-size: 2.4rem;
    margin-bottom: 18px;
    display: inline-block;
    filter: drop-shadow(0 0 12px rgba(255, 107, 53, 0.3));
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-dim);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ---------- 数据 ---------- */
.stats {
    padding: 60px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

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

.stat {
    text-align: center;
}

.stat-num {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    font-weight: 700;
    line-height: 1;
    margin-bottom: 10px;
}

.stat-label {
    color: var(--text-dim);
    font-size: 0.88rem;
}

/* ---------- 精选项目 ---------- */
.featured-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.featured-item {
    display: flex;
    align-items: center;
    gap: 32px;
    padding: 28px 32px;
    color: var(--text);
}

.featured-num {
    font-family: var(--font-mono);
    font-size: 1.6rem;
    font-weight: 500;
    color: var(--accent);
    opacity: 0.5;
    flex-shrink: 0;
    transition: opacity 0.3s ease;
}

.featured-item:hover .featured-num {
    opacity: 1;
}

.featured-body {
    flex: 1;
}

.featured-body h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    transition: color 0.3s ease;
}

.featured-item:hover .featured-body h3 {
    color: var(--accent-2);
}

.featured-body p {
    color: var(--text-dim);
    font-size: 0.93rem;
    margin-bottom: 12px;
}

.featured-arrow {
    font-size: 1.6rem;
    color: var(--accent);
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.featured-item:hover .featured-arrow {
    transform: translateX(6px);
}

.featured-cta {
    text-align: center;
    margin-top: 40px;
}

/* ---------- CTA ---------- */
.cta {
    padding: 80px 0 100px;
}

.cta-box {
    text-align: center;
    padding: 60px 40px;
    background: linear-gradient(135deg, rgba(255, 107, 53, 0.08), rgba(247, 201, 72, 0.04));
    border-color: var(--border-strong);
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--accent), transparent);
}

.cta-box h2 {
    font-size: clamp(1.8rem, 3vw, 2.6rem);
    margin-bottom: 16px;
}

.cta-box p {
    color: var(--text-dim);
    margin-bottom: 32px;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ---------- 响应式 ---------- */
@media screen and (max-width: 860px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px 16px;
    }

    .featured-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        padding: 24px;
    }

    .featured-arrow {
        display: none;
    }

    .hero-actions {
        margin-bottom: 60px;
    }
}

@media screen and (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .cta-box {
        padding: 40px 24px;
    }
}