/* ===== 全局重置 & 变量 ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #a5b4fc;
    --secondary: #8b5cf6;
    --accent: #06b6d4;
    --gradient-bg: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --dark-bg: #0b0a1a;
    --card-bg: rgba(30, 27, 75, 0.5);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --radius: 20px;
    --radius-sm: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(11, 10, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: 10px 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-icon {
    color: var(--primary-light);
    font-size: 1.6rem;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-light);
    transition: var(--transition);
    border-radius: 2px;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

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

.hamburger {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.6rem;
    cursor: pointer;
    transition: var(--transition);
}

/* ===== Hero 区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    background: var(--gradient-bg);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.2), transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-text .badge {
    display: inline-block;
    background: rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(99, 102, 241, 0.3);
    padding: 6px 18px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary-light);
    margin-bottom: 24px;
    backdrop-filter: blur(4px);
}

.hero-text h1 {
    font-size: 3.2rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin-bottom: 36px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.1rem;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary-light);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* Hero 可视化卡片 */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 32px 28px;
    width: 100%;
    max-width: 360px;
    text-align: center;
    box-shadow: var(--shadow);
    position: relative;
    z-index: 2;
}

.logo-preview {
    width: 100px;
    height: 100px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: #fff;
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.3);
}

.hero-card-info {
    margin-bottom: 20px;
}

.brand-name-preview {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.brand-industry-preview {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.hero-card-site {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    padding: 12px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px dashed var(--glass-border);
}

/* 浮动装饰 */
.floating-shapes .shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(99, 102, 241, 0.15);
    backdrop-filter: blur(2px);
    border: 1px solid rgba(255, 255, 255, 0.05);
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 80px;
    height: 80px;
    top: -20px;
    right: -20px;
    animation-delay: 0s;
}

.shape-2 {
    width: 50px;
    height: 50px;
    bottom: 20px;
    left: -30px;
    animation-delay: 2s;
    background: rgba(6, 182, 212, 0.15);
}

.shape-3 {
    width: 40px;
    height: 40px;
    top: 50%;
    right: -50px;
    animation-delay: 4s;
    background: rgba(139, 92, 246, 0.15);
}

@keyframes float {
    0%,
    100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-20px) rotate(10deg);
    }
}

/* ===== 生成器区域 ===== */
.generator {
    padding: 100px 0;
    background: var(--dark-bg);
    position: relative;
}

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

.section-header h2 {
    font-size: 2.4rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.generator-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
    align-items: start;
}

/* 表单卡片 */
.generator-form-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 36px 32px;
    backdrop-filter: blur(12px);
    position: relative;
    overflow: hidden;
}

.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 40%, rgba(99, 102, 241, 0.08), transparent 60%);
    pointer-events: none;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-group label i {
    color: var(--primary-light);
}

input[type="text"],
select {
    width: 100%;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
    font-family: inherit;
}

input[type="text"]:focus,
select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

select option {
    background: #1e1b4b;
    color: #f1f5f9;
}

/* 风格选择器 */
.style-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.style-chip {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.style-chip i {
    font-size: 0.8rem;
}

.style-chip:hover {
    background: rgba(255, 255, 255, 0.1);
}

.style-chip.active {
    background: rgba(99, 102, 241, 0.2);
    border-color: var(--primary);
    color: var(--text-primary);
}

/* 结果卡片 */
.generator-result-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 36px 32px;
    min-height: 500px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(12px);
    transition: var(--transition);
}

.result-placeholder {
    text-align: center;
    color: var(--text-muted);
}

.result-placeholder i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.4;
}

.result-placeholder p {
    font-size: 1.1rem;
}

.result-content {
    width: 100%;
}

.result-logo-area {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--glass-border);
}

.result-logo {
    width: 90px;
    height: 90px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.3);
    flex-shrink: 0;
}

.result-brand-info h3 {
    font-size: 1.6rem;
    margin-bottom: 6px;
}

.industry-tag,
.style-tag {
    display: inline-block;
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--glass-border);
    margin-right: 8px;
    color: var(--text-secondary);
}

/* 网站预览 */
.result-site-preview {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--glass-border);
    margin-bottom: 24px;
}

.preview-header {
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.04);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--glass-border);
}

.badge-site {
    margin-left: auto;
    background: rgba(6, 182, 212, 0.15);
    color: var(--accent);
    padding: 2px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 500;
}

.preview-body {
    padding: 20px;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.preview-body .preview-hero {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(6, 182, 212, 0.1));
    border-radius: var(--radius-sm);
    padding: 24px 20px;
    text-align: center;
}

.preview-body .preview-hero h4 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.preview-body .preview-hero p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.preview-body .preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
}

.preview-body .preview-grid .preview-card {
    background: rgba(255, 255, 255, 0.04);
    border-radius: 8px;
    padding: 16px 12px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
}

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

/* ===== 案例展示 ===== */
.showcase {
    padding: 100px 0;
    background: var(--gradient-bg);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.case-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
    cursor: pointer;
    backdrop-filter: blur(8px);
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    border-color: rgba(99, 102, 241, 0.3);
}

.case-logo {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin-bottom: 16px;
    color: #fff;
}

.case-card h4 {
    font-size: 1.2rem;
    margin-bottom: 6px;
}

.case-card .case-industry {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.case-card .case-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 32px 28px;
    transition: var(--transition);
    backdrop-filter: blur(8px);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    border-color: rgba(99, 102, 241, 0.2);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(6, 182, 212, 0.1));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: var(--primary-light);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== 页脚 ===== */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--glass-border);
    background: rgba(0, 0, 0, 0.3);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    text-align: center;
}

.footer-brand {
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-light);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--text-primary);
}

.footer-copy {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ===== 回到顶部 ===== */
#backToTop {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: #fff;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 999;
}

#backToTop.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#backToTop:hover {
    transform: translateY(-4px) scale(1.05);
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text p {
        margin: 0 auto 36px;
    }

    .hero-visual {
        order: -1;
    }

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

    .hero-text h1 {
        font-size: 2.6rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(11, 10, 26, 0.95);
        backdrop-filter: blur(20px);
        padding: 20px 24px;
        border-bottom: 1px solid var(--glass-border);
    }

    .nav-links.open {
        display: flex;
    }

    .hamburger {
        display: block;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .generator-form-card,
    .generator-result-card {
        padding: 24px 20px;
    }

    .result-logo-area {
        flex-direction: column;
        text-align: center;
    }

    .preview-body .preview-grid {
        grid-template-columns: 1fr;
    }

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

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

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-text h1 {
        font-size: 1.7rem;
    }

    .btn-large {
        padding: 14px 28px;
        font-size: 1rem;
    }

    .style-options {
        gap: 8px;
    }

    .style-chip {
        padding: 8px 14px;
        font-size: 0.8rem;
    }
}