/**
 * Layout Styles
 * 布局样式
 */

/* ==================== Header ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: var(--z-fixed);
    background: rgba(10, 13, 26, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.header.scrolled {
    height: 70px;
    background: rgba(10, 13, 26, 0.95);
}

.header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-gold);
    border-radius: var(--radius-md);
    color: var(--color-primary-dark);
}

.logo-icon i {
    width: 24px;
    height: 24px;
}

.logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.logo-text {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-text);
    letter-spacing: 0.05em;
}

/* Navigation */
.nav {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    position: relative;
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-sm) 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-gold);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-accent);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.search-toggle,
.mobile-menu-toggle {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.search-toggle:hover,
.mobile-menu-toggle:hover {
    background: var(--color-bg-secondary);
    color: var(--color-accent);
}

.search-toggle i,
.mobile-menu-toggle i {
    width: 22px;
    height: 22px;
}

.mobile-menu-toggle {
    display: none;
}

/* ==================== Mobile Menu ==================== */
.mobile-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 320px;
    height: 100vh;
    background: var(--color-bg);
    z-index: var(--z-modal);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--color-border);
}

.mobile-menu-header .logo-text {
    font-size: var(--text-lg);
}

.close-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.close-btn:hover {
    color: var(--color-text);
}

.close-btn i {
    width: 24px;
    height: 24px;
}

.mobile-nav {
    padding: var(--space-xl);
}

.mobile-nav .nav-link {
    display: block;
    font-size: var(--text-lg);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border-light);
}

/* ==================== Search Modal ==================== */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 13, 26, 0.95);
    backdrop-filter: blur(10px);
    z-index: var(--z-modal);
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 15vh;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.search-modal.active {
    opacity: 1;
    visibility: visible;
}

.search-modal-content {
    width: 90%;
    max-width: 700px;
}

.search-input-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: border-color var(--transition-fast);
}

.search-input-wrapper:focus-within {
    border-color: var(--color-accent);
}

.search-input-wrapper i {
    width: 28px;
    height: 28px;
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.search-input {
    flex: 1;
    background: none;
    border: none;
    font-size: var(--text-xl);
    color: var(--color-text);
    outline: none;
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.search-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.search-close:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

.search-results {
    margin-top: var(--space-xl);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    max-height: 50vh;
    overflow-y: auto;
}

.search-hint {
    text-align: center;
    color: var(--color-text-muted);
    padding: var(--space-xl);
}

/* ==================== Hero Section ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 31, 60, 0.95) 0%, rgba(10, 13, 26, 0.9) 100%);
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(2px 2px at 20px 30px, rgba(212, 175, 55, 0.3), transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(212, 175, 55, 0.2), transparent),
        radial-gradient(1px 1px at 90px 40px, rgba(255, 255, 255, 0.3), transparent),
        radial-gradient(2px 2px at 130px 80px, rgba(212, 175, 55, 0.3), transparent),
        radial-gradient(1px 1px at 160px 120px, rgba(255, 255, 255, 0.2), transparent);
    background-size: 200px 200px;
    animation: particleFloat 20s linear infinite;
}

@keyframes particleFloat {
    from { background-position: 0 0; }
    to { background-position: 200px 200px; }
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 900px;
    padding: 0 var(--container-padding);
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.5rem 1.25rem;
    background: var(--gradient-gold-subtle);
    border: 1px solid var(--color-border-accent);
    border-radius: var(--radius-full);
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    color: var(--color-accent);
    margin-bottom: var(--space-xl);
}

.hero-badge i {
    width: 16px;
    height: 16px;
}

.hero-title {
    font-size: var(--text-hero);
    font-weight: var(--font-bold);
    line-height: 1.1;
    margin-bottom: var(--space-xl);
}

.hero-title-line {
    display: block;
    color: var(--color-text);
}

.hero-title-accent {
    display: block;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-2xl);
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-3xl);
}

.hero-scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    animation: bounce 2s infinite;
}

.hero-scroll-indicator i {
    width: 24px;
    height: 24px;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(10px); }
    60% { transform: translateY(5px); }
}

.hero-decoration {
    position: absolute;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
}

.decoration-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    margin: 0 auto;
}

.decoration-dots {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    margin-top: var(--space-md);
}

.decoration-dots span {
    width: 4px;
    height: 4px;
    background: var(--color-accent);
    border-radius: var(--radius-full);
}

/* ==================== Features Section ==================== */
.features {
    padding: var(--space-section) 0;
    background: var(--color-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ==================== About Section ==================== */
.about {
    padding: var(--space-section) 0;
    background: var(--color-bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

@media (max-width: 968px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
}

.about-image {
    position: relative;
}

.about-image-wrapper {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.about-image-wrapper img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

.about-image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 31, 60, 0.4) 0%, rgba(212, 175, 55, 0.2) 100%);
}

.about-experience {
    position: absolute;
    bottom: var(--space-xl);
    right: calc(-1 * var(--space-xl));
    width: 150px;
    height: 150px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--gradient-gold);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-gold);
}

@media (max-width: 640px) {
    .about-experience {
        right: var(--space-md);
        width: 120px;
        height: 120px;
    }
}

.experience-number {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--color-primary-dark);
    line-height: 1;
}

.experience-text {
    font-size: var(--text-sm);
    color: var(--color-primary-dark);
    text-align: center;
}

.about-content .section-tag {
    justify-content: flex-start;
}

.about-content .section-tag::before {
    display: none;
}

.about-text {
    margin-bottom: var(--space-xl);
}

.about-text p {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-md);
}

.about-stats {
    display: flex;
    gap: var(--space-3xl);
    margin-bottom: var(--space-xl);
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.about-stat {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: var(--space-xs);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--color-accent);
}

.stat-suffix {
    font-size: var(--text-2xl);
    color: var(--color-accent-light);
}

.stat-label {
    width: 100%;
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ==================== Stats Section ==================== */
.stats {
    position: relative;
    padding: var(--space-section) 0;
    overflow: hidden;
}

.stats-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-secondary) 50%, var(--color-bg) 100%);
}

.stats-grid {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
}

@media (max-width: 968px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

/* ==================== Articles Section ==================== */
.articles {
    padding: var(--space-section) 0;
    background: var(--color-bg);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

@media (max-width: 1024px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .articles-grid {
        grid-template-columns: 1fr;
    }
}

/* ==================== Partners Section ==================== */
.partners {
    padding: var(--space-section) 0;
    background: var(--color-bg-secondary);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--space-lg);
}

@media (max-width: 1024px) {
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 640px) {
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==================== CTA Section ==================== */
.cta {
    position: relative;
    padding: var(--space-section) 0;
    overflow: hidden;
}

.cta-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.cta-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.cta-content {
    position: relative;
    text-align: center;
}

.cta-title {
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
    margin-bottom: var(--space-lg);
}

.cta-description {
    font-size: var(--text-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2xl);
}

.cta-actions {
    display: flex;
    justify-content: center;
}

/* ==================== Footer ==================== */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

.footer-main {
    padding: var(--space-3xl) 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-3xl);
}

@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.footer-logo .logo-icon {
    width: 36px;
    height: 36px;
}

.footer-logo .logo-icon i {
    width: 20px;
    height: 20px;
}

.footer-logo .logo-img {
    width: 36px;
    height: 36px;
}

.footer-logo .logo-text {
    font-size: var(--text-lg);
}

.footer-description {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-lg);
}

.footer-social {
    display: flex;
    gap: var(--space-md);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--gradient-gold);
    color: var(--color-primary-dark);
}

.social-link i {
    width: 18px;
    height: 18px;
}

.footer-links {
    display: flex;
    gap: var(--space-2xl);
    flex-wrap: wrap;
}

@media (max-width: 1024px) {
    .footer-links {
        gap: var(--space-xl);
    }
}

.footer-column {
    min-width: 140px;
}

.footer-title {
    font-family: var(--font-heading);
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.footer-list li {
    margin-bottom: 0;
}

.footer-list a {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    white-space: nowrap;
}

.footer-list a:hover {
    color: var(--color-accent);
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.footer-contact i {
    width: 16px;
    height: 16px;
    margin-top: 2px;
    color: var(--color-accent);
    flex-shrink: 0;
}

.footer-bottom {
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-border);
}

.footer-bottom-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.copyright {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    margin: 0;
}

.footer-legal {
    display: flex;
    gap: var(--space-lg);
}

.footer-legal a {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.footer-legal a:hover {
    color: var(--color-accent);
}

/* ==================== Responsive Adjustments ==================== */
@media (max-width: 768px) {
    .nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: var(--text-4xl);
    }

    .hero-description {
        font-size: var(--text-base);
    }

    .hero-actions {
        flex-direction: column;
    }

    .about-stats {
        flex-direction: column;
        gap: var(--space-xl);
    }

    .section-title {
        font-size: var(--text-3xl);
    }

    .cta-title {
        font-size: var(--text-3xl);
    }

    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
    }
}