/* ===== 全局重置与变量 ===== */
:root {
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --secondary: #06b6d4;
    --secondary-light: #22d3ee;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-section: #f8fafc;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --border: #e2e8f0;
    --white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.15);
    --radius: 16px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-primary);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

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

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
    color: var(--primary);
}

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

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-menu li a {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: var(--primary);
    background: rgba(99,102,241,0.08);
}

.nav-menu li a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

.nav-admin {
    background: var(--primary) !important;
    color: var(--white) !important;
    padding: 8px 20px !important;
    border-radius: 20px !important;
}

.nav-admin:hover {
    background: var(--primary-dark) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99,102,241,0.4);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 100px 24px 60px;
    background: linear-gradient(135deg, #f0f4ff 0%, #e0e7ff 50%, #f0fdf4 100%);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(99,102,241,0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(6,182,212,0.08) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(245,158,11,0.05) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.hero-logo {
    width: 280px;
    margin: 0 auto 32px;
    display: block;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 12px;
}

.hero-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.8;
}

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

.btn {
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: var(--primary);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(99,102,241,0.4);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99,102,241,0.5);
}

.btn-secondary {
    background: var(--white);
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: rgba(99,102,241,0.05);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
}

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ===== 通用章节样式 ===== */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

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

/* ===== 命名方案区域 ===== */
.schemes {
    padding: 100px 0;
    background: var(--bg-section);
}

.filter-bar {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 20px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: var(--white);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.schemes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 24px;
}

.scheme-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.scheme-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.scheme-card.recommended {
    border: 2px solid var(--accent);
    position: relative;
}

.scheme-card.recommended::before {
    content: '推荐';
    position: absolute;
    top: 12px;
    right: 12px;
    background: var(--accent);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    z-index: 1;
}

.scheme-header {
    padding: 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: start;
}

.scheme-type {
    font-size: 12px;
    color: var(--primary);
    background: rgba(99,102,241,0.1);
    padding: 4px 10px;
    border-radius: 12px;
    font-weight: 500;
}

.scheme-rating {
    display: flex;
    gap: 2px;
}

.scheme-rating .star {
    color: #ddd;
    font-size: 14px;
}

.scheme-rating .star.filled {
    color: var(--accent);
}

.scheme-body {
    padding: 24px;
}

.scheme-name {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.scheme-english {
    font-size: 14px;
    color: var(--text-secondary);
    font-family: 'Inter', sans-serif;
    margin-bottom: 16px;
}

.scheme-meaning {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.scheme-slogan {
    background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(6,182,212,0.08));
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    border-left: 3px solid var(--primary);
}

.scheme-slogan strong {
    font-size: 16px;
    color: var(--primary);
}

.scheme-slogan p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.scheme-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}

.scheme-tags span {
    font-size: 12px;
    padding: 3px 10px;
    border-radius: 12px;
    background: var(--bg-section);
    color: var(--text-secondary);
}

.scheme-scores {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.score-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
}

.score-item span:first-child {
    color: var(--text-secondary);
}

.score-bar {
    width: 80px;
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
}

.score-bar-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 3px;
    transition: width 1s ease;
}

.scheme-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    gap: 8px;
}

.scheme-footer button {
    flex: 1;
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--white);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
}

.scheme-footer button:hover {
    background: var(--bg-section);
    color: var(--primary);
    border-color: var(--primary);
}

.scheme-footer button.copy-btn {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.scheme-footer button.copy-btn:hover {
    background: var(--primary-dark);
}

/* ===== 方案对比区域 ===== */
.compare {
    padding: 100px 0;
    background: var(--white);
}

.compare-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 900px;
}

.compare-table th,
.compare-table td {
    padding: 14px 16px;
    text-align: center;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}

.compare-table th {
    background: var(--primary);
    color: var(--white);
    font-weight: 600;
    position: sticky;
    top: 0;
}

.compare-table th:first-child {
    text-align: left;
    background: var(--primary-dark);
}

.compare-table td:first-child {
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-section);
}

.compare-table tr:nth-child(even) td {
    background: var(--bg-section);
}

.compare-table tr:hover td {
    background: rgba(99,102,241,0.05);
}

.compare-table .score-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 4px;
}

.compare-table .score-dot.high { background: #22c55e; }
.compare-table .score-dot.medium { background: var(--accent); }
.compare-table .score-dot.low { background: #ef4444; }

/* ===== 命名方法论 ===== */
.methodology {
    padding: 100px 0;
    background: var(--bg-dark);
    color: var(--white);
}

.methodology .section-header h2 {
    color: var(--white);
}

.methodology .section-header p {
    color: var(--text-light);
}

.methodology-steps {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.step {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 32px;
    transition: var(--transition);
    border: 1px solid rgba(255,255,255,0.08);
}

.step:hover {
    transform: translateY(-4px);
    border-color: var(--primary);
}

.step-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    opacity: 0.6;
}

.step h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.step p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== 品牌故事 ===== */
.story {
    padding: 100px 0;
    background: var(--bg-section);
}

.story-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    border-radius: var(--radius);
    padding: 48px;
    box-shadow: var(--shadow-md);
    position: relative;
}

.story-badge {
    position: absolute;
    top: -12px;
    left: 48px;
    background: var(--accent);
    color: var(--white);
    padding: 4px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
}

.story-brand {
    text-align: center;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 2px solid var(--border);
}

.story-name {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    display: block;
}

.story-slogan {
    font-size: 18px;
    color: var(--text-secondary);
    margin-top: 8px;
    font-style: italic;
}

.story-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    margin: 24px 0 8px;
}

.story-content h3:first-child {
    margin-top: 0;
}

.story-content p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.story-quote {
    background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(6,182,212,0.08));
    padding: 24px;
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--primary);
    font-size: 16px;
    color: var(--text-primary);
    font-style: italic;
    margin-top: 24px;
    line-height: 1.6;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-dark);
    color: var(--white);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 12px;
    line-height: 1.6;
}

.footer-logo {
    width: 180px;
}

.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--white);
}

.footer-links ul li {
    margin-bottom: 8px;
}

.footer-links ul li a {
    font-size: 14px;
    color: var(--text-light);
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--primary-light);
}

.footer-contact p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 8px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: var(--text-light);
}

/* ===== 返回顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--white);
    border: none;
    cursor: pointer;
    font-size: 20px;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.show {
    display: flex;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 16px 24px;
        box-shadow: var(--shadow-md);
        display: none;
    }

    .nav-menu.show {
        display: flex;
    }

    .nav-menu li a {
        padding: 12px 16px;
        width: 100%;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-stats {
        gap: 24px;
    }

    .stat-number {
        font-size: 28px;
    }

    .section-header h2 {
        font-size: 28px;
    }

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

    .scheme-name {
        font-size: 24px;
    }

    .story-card {
        padding: 32px 24px;
    }

    .story-name {
        font-size: 28px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .compare-table th,
    .compare-table td {
        padding: 10px 12px;
        font-size: 12px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 80px 16px 40px;
    }

    .hero-title {
        font-size: 26px;
    }

    .hero-logo {
        width: 200px;
    }

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

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

    .schemes,
    .compare,
    .methodology,
    .story {
        padding: 60px 0;
    }

    .scheme-header,
    .scheme-body,
    .scheme-footer {
        padding: 16px;
    }

    .scheme-scores {
        grid-template-columns: 1fr;
    }

    .methodology-steps {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 16px;
    }
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.scheme-card,
.step,
.story-card {
    animation: fadeInUp 0.6s ease forwards;
}

.scheme-card:nth-child(1) { animation-delay: 0.1s; }
.scheme-card:nth-child(2) { animation-delay: 0.2s; }
.scheme-card:nth-child(3) { animation-delay: 0.3s; }
.scheme-card:nth-child(4) { animation-delay: 0.4s; }
.scheme-card:nth-child(5) { animation-delay: 0.5s; }
.scheme-card:nth-child(6) { animation-delay: 0.6s; }
```

---