/* ===== 落地页样式 ===== */

/* 导航栏 */
.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 20px 0;
    transition: all 0.3s ease;
    background: transparent;
}

.landing-nav.nav-scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    padding: 14px 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    transition: color 0.3s;
}

.nav-scrolled .logo-text {
    color: var(--text-primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-link:hover {
    color: #fff;
}

.nav-scrolled .nav-link {
    color: var(--text-secondary);
}

.nav-scrolled .nav-link:hover {
    color: var(--primary);
}

.nav-btn-register {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    padding: 10px 22px;
    border-radius: 10px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.2s;
}

.nav-btn-register:hover {
    background: rgba(255, 255, 255, 0.3);
    color: #fff;
    transform: translateY(-1px);
}

.nav-scrolled .nav-btn-register {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border: none;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.35);
}

.nav-scrolled .nav-btn-register:hover {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.5);
}

/* Hero 区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #1e1b4b 0%, #4c1d95 40%, #7c3aed 70%, #a855f7 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.hero-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: #8b5cf6;
    top: -150px;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: #ec4899;
    bottom: -100px;
    left: -50px;
    animation: float 10s ease-in-out infinite reverse;
}

.blob-3 {
    width: 300px;
    height: 300px;
    background: #06b6d4;
    top: 40%;
    left: 30%;
    animation: float 12s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    color: #fff;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 28px;
    backdrop-filter: blur(10px);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #10b981;
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 52px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: linear-gradient(135deg, #fbbf24 0%, #f472b6 50%, #60a5fa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 17px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 36px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.btn-hero-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    background: #fff;
    color: var(--primary-dark);
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.3);
}

.btn-hero-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(255, 255, 255, 0.4);
    color: var(--primary-dark);
}

.btn-hero-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.btn-hero-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
}

.stat-item {
    text-align: left;
}

.stat-number {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
}

/* Hero 视觉卡片 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-card-float {
    position: relative;
    width: 100%;
    max-width: 420px;
}

.float-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    overflow: hidden;
    animation: cardFloat 6s ease-in-out infinite;
}

.card-main {
    position: relative;
    z-index: 2;
}

@keyframes cardFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.card-header {
    padding: 16px 20px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    display: flex;
    align-items: center;
    gap: 12px;
}

.card-dots {
    display: flex;
    gap: 6px;
}

.card-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
}

.card-dots span:first-child {
    background: #ef4444;
}

.card-dots span:nth-child(2) {
    background: #f59e0b;
}

.card-dots span:nth-child(3) {
    background: #10b981;
}

.card-title {
    color: #fff;
    font-size: 14px;
    font-weight: 600;
}

.card-body {
    padding: 20px;
}

.code-item {
    padding: 14px;
    background: var(--bg);
    border-radius: 12px;
    margin-bottom: 12px;
    transition: all 0.3s;
}

.code-item:last-child {
    margin-bottom: 0;
}

.code-item:hover {
    background: #eef2ff;
}

.code-sender {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.sender-avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
}

.sender-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.sender-time {
    font-size: 11px;
    color: var(--text-muted);
}

.code-content {
    display: flex;
    align-items: center;
    gap: 10px;
}

.code-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.code-value {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--primary-dark);
    font-family: 'SF Mono', Monaco, monospace;
}

.card-side {
    position: absolute;
    right: -20px;
    bottom: 30px;
    padding: 12px 20px;
    animation: cardFloat 6s ease-in-out infinite 1s;
    z-index: 1;
}

.mini-stat {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--success);
}

.mini-icon {
    width: 24px;
    height: 24px;
    background: var(--success);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

/* 通用区块 */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* 功能特性 */
.features {
    padding: 100px 0;
    background: var(--bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: #fff;
    padding: 32px;
    border-radius: 16px;
    border: 1px solid var(--border-light);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: #fff;
}

.icon-purple {
    background: linear-gradient(135deg, #8b5cf6 0%, #6366f1 100%);
}

.icon-blue {
    background: linear-gradient(135deg, #3b82f6 0%, #0ea5e9 100%);
}

.icon-green {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.icon-pink {
    background: linear-gradient(135deg, #ec4899 0%, #db2777 100%);
}

.icon-orange {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.icon-cyan {
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

.feature-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 使用场景 */
.usecases {
    padding: 100px 0;
    background: #fff;
}

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

.usecase-item {
    padding: 28px;
    border-radius: 16px;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border: 1px solid var(--border-light);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.usecase-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.1);
}

.usecase-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s;
}

.usecase-item:hover::before {
    transform: scaleX(1);
}

.usecase-num {
    font-size: 36px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 16px;
}

.usecase-item h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.usecase-item p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* CTA 区域 */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #4c1d95 0%, #7c3aed 50%, #a855f7 100%);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-section::after {
    content: '';
    position: absolute;
    bottom: -50%;
    right: -20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.cta-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

.cta-content {
    text-align: center;
    color: #fff;
}

.cta-content h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.cta-content p {
    font-size: 17px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 36px;
}

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

.btn-cta-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 36px;
    background: #fff;
    color: var(--primary-dark);
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.3);
}

.btn-cta-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(255, 255, 255, 0.4);
    color: var(--primary-dark);
}

.btn-cta-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 36px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.btn-cta-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    transform: translateY(-2px);
}

/* 页脚 */
.landing-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 60px 0 0;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-brand .footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-brand .logo-text {
    color: #fff;
    font-size: 20px;
    font-weight: 700;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.7;
    max-width: 360px;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.footer-col h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    color: #94a3b8;
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 12px;
    transition: color 0.2s;
}

.footer-col a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
}

/* 响应式 */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero-content {
        order: 1;
    }

    .hero-visual {
        order: 0;
    }

    .hero-card-float {
        max-width: 360px;
        margin: 0 auto;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-actions {
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .usecase-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 15px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn-hero-primary,
    .btn-hero-secondary {
        width: 100%;
        justify-content: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .stat-divider {
        display: none;
    }

    .section-title {
        font-size: 28px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .usecase-grid {
        grid-template-columns: 1fr;
    }

    .cta-content h2 {
        font-size: 28px;
    }

    .cta-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn-cta-primary,
    .btn-cta-secondary {
        width: 100%;
        justify-content: center;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .nav-actions .nav-link {
        display: none;
    }
}