/* =====================================================
   LunarStar Homepage Styles
   基于现有 Design System，仅新增首页专属规则
   ===================================================== */

/* ===== Hero ===== */
.hero-title {
    font-family: var(--font-primary);
    font-size: clamp(48px, 6vw, 88px);
    font-weight: var(--font-weight-light);
    letter-spacing: 6px;
    color: var(--gold);
    text-shadow: 0 0 80px rgba(217,181,106,0.25);
    margin-bottom: var(--space-5);
    line-height: 1.1;
}

.hero-slogan {
    font-size: clamp(18px, 2vw, 26px);
    font-weight: var(--font-weight-light);
    color: var(--text-secondary);
    letter-spacing: 2px;
    margin-bottom: var(--space-5);
}

.hero-desc {
    max-width: 620px;
    margin: 0 auto var(--space-8);
    line-height: 1.8;
    opacity: 0.72;
    font-size: var(--font-size-lg);
}

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

.hero-start-btn {
    background: linear-gradient(135deg, var(--gold), var(--gold-dark));
    color: var(--bg);
    border: none;
    padding: 16px 40px;
    border-radius: 32px;
    font-family: var(--font-primary);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    letter-spacing: 1px;
    cursor: pointer;
    transition: all var(--transition-normal);
}
.hero-start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(217,181,106,0.3);
}

.hero-secondary-btn {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--line);
    padding: 16px 40px;
    border-radius: 32px;
    font-family: var(--font-primary);
    font-size: var(--font-size-lg);
    letter-spacing: 1px;
    cursor: pointer;
    transition: all var(--transition-normal);
}
.hero-secondary-btn:hover {
    border-color: var(--gold);
    color: var(--gold);
}

/* Canvas 背景容器 */
#hero-background-canvas {
    position: absolute;
    inset: 0;
    z-index: 0;
}

/* Hero content 在 Canvas 之上 */
.hero .hero-content {
    z-index: 1;
}

/* ===== Card Icon ===== */
.card-icon {
    font-size: 36px;
    margin-bottom: var(--space-5);
}

/* ===== Feature Tiles (Section 03) ===== */
.features-grid {
    gap: 24px;
}

.feature-tile {
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, rgba(15, 16, 28, 0.85), rgba(7, 8, 18, 0.94));
    border: 1px solid rgba(217, 181, 106, 0.12);
    border-radius: 24px;
    padding: var(--space-7) var(--space-6);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-slow);
}
.feature-tile:hover {
    transform: translateY(-4px);
    border-color: rgba(217, 181, 106, 0.35);
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}
.feature-tile--reserved {
    opacity: 0.5;
    cursor: default;
}
.feature-tile--reserved:hover {
    transform: none;
    border-color: rgba(217, 181, 106, 0.12);
    box-shadow: none;
}

.feature-tile-icon {
    font-size: 32px;
    display: block;
    margin-bottom: var(--space-4);
}

.feature-tile h4 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
    color: var(--text);
}

.feature-tile p {
    font-size: var(--font-size-sm);
    opacity: 0.65;
}

/* ===== Why Cards (Section 04) ===== */
.why-card {
    padding: var(--space-8) var(--space-7);
    background: linear-gradient(180deg, rgba(15, 16, 28, 0.6), rgba(7, 8, 18, 0.8));
    border: 1px solid rgba(217, 181, 106, 0.1);
    border-radius: 24px;
    transition: all var(--transition-slow);
}
.why-card:hover {
    border-color: rgba(217, 181, 106, 0.3);
    transform: translateY(-2px);
}

.why-card-icon {
    font-size: 32px;
    margin-bottom: var(--space-4);
}

.why-card h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-2);
}

.why-card p {
    opacity: 0.68;
    line-height: 1.7;
}

/* ===== Horizontal Timeline (Section 05) ===== */
.timeline-horizontal {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
    max-width: 960px;
    margin: 0 auto;
}

.timeline-step {
    flex: 0 0 auto;
    text-align: center;
    padding: var(--space-5);
    min-width: 160px;
}

.timeline-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--gold);
    color: var(--gold);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-4);
    background: rgba(217,181,106,0.08);
}

.timeline-step h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
}

.timeline-step p {
    font-size: var(--font-size-sm);
    opacity: 0.65;
    line-height: 1.6;
}

.timeline-connector {
    display: flex;
    align-items: center;
    padding-top: 40px;
    flex-shrink: 0;
}

/* ===== Roadmap Timeline (Section 06) ===== */
.roadmap-timeline {
    position: relative;
    max-width: 640px;
    margin: 0 auto;
    padding-left: 32px;
}

.roadmap-timeline::before {
    content: "";
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, var(--gold), rgba(217,181,106,0.15));
}

.roadmap-item {
    position: relative;
    margin-bottom: var(--space-9);
    padding-left: var(--space-8);
}

.roadmap-marker {
    position: absolute;
    left: -29px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gold);
    box-shadow: 0 0 16px rgba(217,181,106,0.4);
    border: 2px solid var(--bg);
}

.roadmap-marker--future {
    background: transparent;
    border: 2px solid rgba(217,181,106,0.4);
    box-shadow: none;
}

.roadmap-date {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--gold);
    letter-spacing: 1px;
    margin-bottom: var(--space-1);
}

.roadmap-content h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
}

.roadmap-content p {
    font-size: var(--font-size-sm);
    opacity: 0.65;
    line-height: 1.6;
}

/* ===== About Us (Section 07) ===== */
.about-us-text {
    text-align: center;
}

.about-us-text p {
    font-size: var(--font-size-lg);
    line-height: 1.9;
    opacity: 0.78;
    margin-bottom: var(--space-7);
}

/* ===== Technology Icons (Section 08) ===== */
.tech-icon {
    font-size: 40px;
}

/* ===== FAQ (Section 09) ===== */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.faq-item {
    border: 1px solid rgba(217, 181, 106, 0.1);
    border-radius: 16px;
    background: rgba(10, 12, 24, 0.5);
    transition: all var(--transition-fast);
    overflow: hidden;
}
.faq-item[open] {
    border-color: rgba(217, 181, 106, 0.3);
    background: rgba(15, 16, 28, 0.7);
}

.faq-item summary {
    padding: var(--space-5) var(--space-6);
    cursor: pointer;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    display: flex;
    justify-content: space-between;
    align-items: center;
    list-style: none;
    user-select: none;
    transition: color var(--transition-fast);
}
.faq-item summary::-webkit-details-marker {
    display: none;
}
.faq-item summary::after {
    content: "+";
    font-size: 20px;
    font-weight: var(--font-weight-light);
    color: var(--gold);
    transition: transform var(--transition-fast);
}
.faq-item[open] summary::after {
    content: "−";
}
.faq-item[open] summary {
    color: var(--gold);
}

.faq-item p {
    padding: 0 var(--space-6) var(--space-5);
    font-size: var(--font-size-md);
    opacity: 0.72;
    line-height: 1.75;
}

/* ===== Footer ===== */
.footer {
    padding: var(--space-15) 0 var(--space-9);
    border-top: 1px solid rgba(217, 181, 106, 0.1);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: var(--space-9);
    margin-bottom: var(--space-11);
}

.footer-col--brand p {
    max-width: 280px;
    margin-top: var(--space-3);
}

.footer-logo {
    font-family: var(--font-primary);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--gold);
    letter-spacing: 3px;
}

.footer-col h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text);
    letter-spacing: 1px;
    margin-bottom: var(--space-5);
    text-transform: uppercase;
    opacity: 0.8;
}

.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-col li {
    margin-bottom: var(--space-3);
}

.footer-col a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
    cursor: pointer;
}
.footer-col a:hover {
    color: var(--gold);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-7);
    border-top: 1px solid rgba(255,255,255,0.04);
}

/* ===== 响应式 ===== */
@media (max-width: 968px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-col--brand {
        grid-column: span 2;
    }
    .timeline-horizontal {
        flex-direction: column;
        align-items: center;
    }
    .timeline-connector {
        transform: rotate(90deg);
        padding-top: 0;
        margin: var(--space-1) 0;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: clamp(36px, 8vw, 56px);
    }
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .footer-col--brand {
        grid-column: span 1;
    }
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
    }
    .roadmap-timeline {
        padding-left: 24px;
    }
    .roadmap-item {
        padding-left: var(--space-6);
    }
    .roadmap-marker {
        left: -21px;
        width: 10px;
        height: 10px;
    }
}