/* CSS 变量与基础样式 */
:root {
    --primary-red: #B91C1C;        /* 深红色 - 主色调 */
    --secondary-red: #DC2626;      /* 鲜红色 - 强调色 */
    --accent-gold: #D97706;        /* 玫瑰金 - 点缀色 */
    --dark-wine: #7F1D1D;          /* 酒红色 - 深色调 */
    --bg-light: #FEF2F2;           /* 淡红背景 */
    --bg-gray: #F5F5F5;
    --text-main: #1F1F1F;          /* 更深的文字色 */
    --text-sub: #666666;
    --border-color: #FEE2E2;       /* 淡红边框 */
    --shadow-sm: 0 2px 8px rgba(185, 28, 28, 0.08);
    --shadow-md: 0 4px 16px rgba(185, 28, 28, 0.12);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    font-size: 16px;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-red) 0%, var(--secondary-red) 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(185, 28, 28, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--dark-wine) 0%, var(--primary-red) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(185, 28, 28, 0.3);
}

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

.btn-secondary:hover {
    background: var(--primary-red);
    color: white;
}

.btn-outline {
    background: transparent;
    color: var(--primary-red);
    border: 2px solid var(--primary-red);
}

.btn-outline:hover {
    background: var(--primary-red);
    color: white;
}

.btn-outline-light {
    background: transparent;
    color: white;
    border: 2px solid white;
    font-size: 14px;
    padding: 10px 20px;
}

.btn-outline-light:hover {
    background: white;
    color: var(--primary-red);
}

.btn-block {
    display: block;
    width: 100%;
}

/* 导航栏 */
.navbar {
    background: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    height: 40px;
    width: auto;
}

.brand-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-red);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-main);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--secondary-red), var(--accent-gold));
    border-radius: 2px;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--primary-red);
    cursor: pointer;
}

/* Hero区 */
.hero {
    background: linear-gradient(135deg, var(--dark-wine) 0%, var(--primary-red) 50%, var(--secondary-red) 100%);
    color: white;
    padding: 80px 0;
}

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

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    font-family: 'Noto Serif SC', serif;
}

.hero-subtitle {
    font-size: 22px;
    margin-bottom: 40px;
    opacity: 0.95;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 40px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.feature-item i {
    font-size: 28px;
    color: var(--accent-gold);
    background: rgba(255,255,255,0.2);
    padding: 12px;
    border-radius: 8px;
    flex-shrink: 0;
}

.feature-item p {
    font-size: 15px;
    line-height: 1.5;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-card {
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 16px;
    padding: 48px;
    text-align: center;
}

.hero-icon {
    font-size: 64px;
    color: white;
    margin-bottom: 24px;
}

.hero-card h3 {
    font-size: 28px;
    margin-bottom: 16px;
}

.hero-card p {
    font-size: 16px;
    opacity: 0.9;
}

/* 核心差异区 */
.difference {
    padding: 80px 0;
    background: var(--bg-light);
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-red);
    margin-bottom: 48px;
    font-family: 'Noto Serif SC', serif;
}

.diff-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.diff-card {
    background: white;
    border-radius: 12px;
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border: 2px solid transparent;
}

.diff-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
}

.diff-card.highlight {
    border-color: var(--secondary-red);
    background: linear-gradient(135deg, rgba(30,91,140,0.05), rgba(46,139,87,0.05));
}

.diff-number {
    position: absolute;
    top: -16px;
    left: 32px;
    background: var(--primary-blue);
    color: white;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    box-shadow: var(--shadow-sm);
}

.diff-card.highlight .diff-number {
    background: var(--secondary-red);
}

.diff-card h3 {
    font-size: 20px;
    color: var(--primary-red);
    margin: 20px 0 16px;
}

.diff-card p {
    font-size: 15px;
    color: var(--text-sub);
    line-height: 1.6;
}

/* 服务模块 */
.services {
    padding: 80px 0;
}

.service-flow {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 48px;
    flex-wrap: wrap;
    gap: 16px;
}

.service-step {
    flex: 1;
    min-width: 160px;
    text-align: center;
    padding: 24px 16px;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
}

.service-step:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.step-number {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--secondary-red);
    color: white;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
}

.service-step i {
    font-size: 40px;
    color: var(--primary-red);
    margin: 16px 0;
}

.service-step h3 {
    font-size: 18px;
    color: var(--primary-red);
    margin-bottom: 12px;
}

.service-step p {
    font-size: 14px;
    color: var(--text-sub);
}

.arrow-right {
    color: var(--accent-gold);
    font-size: 24px;
    flex-shrink: 0;
}

.cta-center {
    text-align: center;
    margin-top: 48px;
}

/* 数据亮点 */
.stats {
    background: linear-gradient(135deg, var(--dark-wine) 0%, var(--primary-red) 50%, var(--secondary-red) 100%);
    color: white;
    padding: 60px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

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

.stat-item i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.9;
}

.stat-item h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat-item p {
    font-size: 16px;
    opacity: 0.9;
}

/* 适用人群 */
.target-audience {
    padding: 80px 0;
    background: var(--bg-light);
}

.audience-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.audience-card {
    background: white;
    border-radius: 12px;
    padding: 40px 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 2px solid transparent;
}

.audience-card:hover {
    border-color: var(--secondary-red);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.audience-card i {
    font-size: 56px;
    color: var(--primary-red);
    margin-bottom: 24px;
}

.audience-card h3 {
    font-size: 22px;
    color: var(--primary-red);
    margin-bottom: 16px;
}

.audience-card p {
    font-size: 15px;
    color: var(--text-sub);
    line-height: 1.6;
}

/* 快速预约表单 */
.quick-form {
    padding: 80px 0;
    background: linear-gradient(135deg, rgba(30,91,140,0.05), rgba(46,139,87,0.05));
}

.form-wrapper {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    padding: 48px 40px;
    box-shadow: var(--shadow-md);
}

.form-wrapper h2 {
    text-align: center;
    color: var(--primary-red);
    margin-bottom: 12px;
}

.form-subtitle {
    text-align: center;
    color: var(--text-sub);
    margin-bottom: 32px;
}

.appointment-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.appointment-form input,
.appointment-form select,
.appointment-form textarea {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
}

.appointment-form input:focus,
.appointment-form select:focus,
.appointment-form textarea:focus {
    outline: none;
    border-color: var(--primary-red);
}

.appointment-form textarea {
    resize: vertical;
    margin-bottom: 16px;
}

.appointment-form button {
    margin-top: 8px;
}

.privacy-note {
    text-align: center;
    font-size: 13px;
    color: var(--text-sub);
    margin-top: 16px;
}

.privacy-note i {
    color: var(--accent-gold);
}

/* 页脚 */
.footer {
    background: #2C3E50;
    color: white;
    padding: 48px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 32px;
}

.footer-logo {
    height: 48px;
    margin-bottom: 16px;
}

.footer-slogan {
    font-size: 14px;
    opacity: 0.9;
    margin-top: 12px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--accent-gold);
}

.footer-section ul {
    list-style: none;
}

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

.footer-section a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: white;
}

.footer-section p {
    font-size: 14px;
    margin-bottom: 8px;
    opacity: 0.9;
}

.footer-section i {
    margin-right: 8px;
    color: var(--accent-gold);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.2);
    padding-top: 24px;
    text-align: center;
    font-size: 13px;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .diff-cards,
    .audience-cards {
        grid-template-columns: 1fr;
    }
    
    .service-flow {
        flex-direction: column;
    }
    
    .arrow-right {
        transform: rotate(90deg);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
    }
    
    .nav-menu.active {
        display: flex;
    }
}

@media (max-width: 600px) {
    .hero {
        padding: 48px 0;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .appointment-form .form-row {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}