/* ==========================================
   172号卡平台 - 主样式文件
   现代、美观、响应式设计
   ========================================== */

/* ========== 基础样式 ========== */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --text-light: #9ca3af;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

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

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

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

/* ========== 按钮样式 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white;
}

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

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

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

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

/* ========== 页头导航 ========== */
.site-header {
    background: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

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

.logo a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: 2rem;
}

.nav-menu {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-list a {
    color: var(--text-dark);
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.nav-list a:hover,
.nav-list a.active {
    color: var(--primary-color);
    background: var(--bg-light);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-dark);
    cursor: pointer;
}

/* ========== 英雄区域 ========== */
.hero-section {
    position: relative;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
    color: white;
    padding: 100px 0 80px;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

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

.shape {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 300px;
    height: 300px;
    top: -100px;
    right: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 200px;
    height: 200px;
    bottom: -50px;
    left: 5%;
    animation-delay: 5s;
}

.shape-3 {
    width: 150px;
    height: 150px;
    top: 50%;
    right: 5%;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(180deg); }
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    animation: slideInLeft 0.8s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1.2rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-badge i {
    color: #fbbf24;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    line-height: 1.6;
}

.hero-features {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
}

.feature-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    backdrop-filter: blur(5px);
}

.feature-tag i {
    color: #10b981;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-btn-primary {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    border: none;
    box-shadow: 0 10px 30px rgba(251, 191, 36, 0.3);
    transition: all 0.3s ease;
}

.hero-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(251, 191, 36, 0.4);
}

.btn-outline-white {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: white;
    transition: all 0.3s ease;
}

.btn-outline-white:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
}

.hero-visual {
    position: relative;
    height: 400px;
    animation: slideInRight 0.8s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.visual-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
    animation: cardFloat 3s infinite ease-in-out;
}

.visual-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.25);
}

.card-1 {
    top: 20px;
    left: 0;
    width: 280px;
    animation-delay: 0s;
}

.card-2 {
    top: 140px;
    right: 20px;
    width: 260px;
    animation-delay: 1s;
}

.card-3 {
    bottom: 40px;
    left: 40px;
    width: 240px;
    animation-delay: 2s;
}

@keyframes cardFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    flex-shrink: 0;
}

.card-content {
    flex: 1;
}

.card-title {
    font-size: 0.9rem;
    color: #64748b;
    margin-bottom: 0.3rem;
}

.card-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1e293b;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-visual {
        height: 300px;
        margin: 0 auto;
        max-width: 400px;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .hero-section {
        padding: 80px 0 60px;
        min-height: auto;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-visual {
        display: none;
    }
    
    .hero-features {
        flex-direction: column;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }
}

/* ========== 通用区块样式 ========== */
.section-padding {
    padding: 20px 0;
}

.section-padding-sm {
    padding: 40px 0;
}

.bg-light {
    background-color: var(--bg-light);
}

.section-header {
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-gray);
}

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

/* ========== 平台介绍 ========== */
.intro-content {
    max-width: 900px;
    margin: 0 auto;
}

.intro-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-gray);
    margin-bottom: 1.5rem;
}

.intro-features {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.feature-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    font-weight: 600;
    color: var(--primary-color);
}

.feature-badge i {
    font-size: 1.5rem;
}

/* ========== 代理政策卡片 ========== */
.policy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.policy-card {
    position: relative;
    background: white;
    border-radius: var(--radius-xl);
    padding: 2.5rem 2rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.policy-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.policy-card.featured {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.policy-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--accent-color);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
}

.policy-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.policy-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.policy-price {
    margin: 1.5rem 0;
}

.policy-price .price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.policy-price .label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-top: 0.25rem;
}

.policy-features {
    list-style: none;
    margin: 2rem 0;
    text-align: left;
}

.policy-features li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.policy-features li:last-child {
    border-bottom: none;
}

.policy-features i {
    color: var(--secondary-color);
    font-size: 1.125rem;
}

/* ========== 产品卡片 ========== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.product-card {
    position: relative;
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    text-align: center;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.product-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.product-image {
    width: 100%;
    height: 180px;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 2.5rem;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.product-image i {
    font-size: 3rem;
}

.product-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-dark);
    min-height: 2.5rem;
}

.product-title a {
    color: var(--text-dark);
}

.product-title a:hover {
    color: var(--primary-color);
}

.product-price {
    text-align: center;
    margin: 1rem 0;
}

.product-price .price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
}

.product-price .unit {
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-left: 0.25rem;
}

.product-specs {
    margin: 1rem 0;
    padding: 1rem 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    text-align: center;
}

.spec-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0.5rem 0;
    font-size: 0.875rem;
    color: var(--text-gray);
    justify-content: center;
}

.spec-item i {
    color: var(--primary-color);
}

.product-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1rem;
    justify-content: center;
}

.product-actions .btn {
    flex: 1;
    text-align: center;
}

/* ========== 优势卡片 ========== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.advantage-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

.advantage-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.advantage-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.advantage-card p {
    color: var(--text-gray);
    line-height: 1.7;
}

/* ========== 合作伙伴 ========== */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.partner-item {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.partner-item:hover {
    box-shadow: var(--shadow-md);
}

.partner-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.partner-logo i {
    font-size: 3rem;
    color: var(--primary-color);
}

.partner-logo span {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
}

/* ========== CTA区域 ========== */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-section .btn-outline {
    border-color: white;
    color: white;
}

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

/* ========== 联系卡片 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-card {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1rem;
    background: var(--bg-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
}

.contact-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.contact-card p {
    color: var(--text-gray);
    margin: 0.5rem 0;
}

.contact-time {
    display: block;
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 0.5rem;
}

/* ========== 页脚 ========== */
.site-footer {
    background: #1f2937;
    color: #d1d5db;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.footer-section li {
    margin: 0.75rem 0;
}

.footer-section a {
    color: #d1d5db;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--primary-light);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}

.social-links a:hover {
    background: var(--primary-color);
    color: white;
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-info i {
    color: var(--primary-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.copyright {
    font-size: 0.875rem;
}

.copyright a {
    color: #d1d5db;
}

.footer-links {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
}

/* ========== 返回顶部按钮 ========== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}

/* ========== 页面标题 ========== */
.page-header {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 3rem 0 2rem;
    margin-bottom: 0;
}

.page-header h1 {
    font-size: 2.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-gray);
}

.breadcrumb a {
    color: var(--text-gray);
}

.breadcrumb a:hover {
    color: var(--primary-color);
}

/* ========== 搜索和筛选 ========== */
.filter-wrapper {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.search-form {
    margin-bottom: 1.5rem;
}

.search-input-group {
    display: flex;
    gap: 1rem;
    max-width: 600px;
    margin: 0 auto;
}

.search-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.filter-tags {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.filter-label {
    font-weight: 600;
    color: var(--text-dark);
}

.filter-tag {
    padding: 0.5rem 1rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    color: var(--text-gray);
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

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

/* 运营商筛选按钮特殊样式 */
.filter-tag i {
    margin-right: 0.25rem;
    font-size: 0.875rem;
}

.filter-tag:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
}

.filter-result {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.clear-filter {
    color: var(--text-gray);
    font-size: 0.875rem;
}

.clear-filter:hover {
    color: var(--primary-color);
}

/* ========== 分页 ========== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.page-link {
    padding: 0.5rem 1rem;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-dark);
    transition: all 0.3s ease;
}

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

.page-ellipsis {
    padding: 0.5rem;
    color: var(--text-gray);
}

/* ========== 空状态 ========== */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.empty-state h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--text-gray);
    margin-bottom: 1.5rem;
}

/* ========== 产品详情页 ========== */
.product-detail-wrapper {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
}

.product-main {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.product-header {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.product-icon-large {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #e0f2fe, #bae6fd);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 4rem;
    flex-shrink: 0;
}

.product-header-info {
    flex: 1;
}

.product-header-info .product-title {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.product-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.meta-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-gray);
}

.product-price-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
}

.price-info .price-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: 0.5rem;
}

.price-value {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.price-value .price {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
}

.price-value .unit {
    font-size: 1rem;
    color: var(--text-gray);
}

.btn-apply {
    padding: 1rem 2.5rem;
}

.product-info-section {
    margin-bottom: 2rem;
}

.product-info-section .section-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.info-grid {
    display: grid;
    gap: 1rem;
}

.info-item {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

.info-label {
    font-weight: 600;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.info-label i {
    color: var(--primary-color);
}

.info-value {
    color: var(--text-gray);
    line-height: 1.7;
}

.product-notice {
    background: #fef3c7;
    border-left: 4px solid var(--accent-color);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin-top: 2rem;
}

.product-notice h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.product-notice ul {
    list-style: none;
}

.product-notice li {
    padding: 0.5rem 0;
    color: var(--text-gray);
    padding-left: 1.5rem;
    position: relative;
}

.product-notice li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: 700;
}

/* ========== 侧边栏 ========== */
.product-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar-section {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.sidebar-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.recommend-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1rem;
}

.recommend-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.recommend-item:hover {
    box-shadow: var(--shadow-md);
}

.recommend-link {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    color: var(--text-dark);
}

.recommend-icon {
    width: 50px;
    height: 50px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.recommend-info {
    flex: 1;
}

.recommend-info h4 {
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
    color: var(--text-dark);
}

.recommend-meta {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.recommend-price .price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.recommend-price .unit {
    font-size: 0.75rem;
    color: var(--text-gray);
}

.help-box {
    text-align: center;
}

.help-box p {
    color: var(--text-gray);
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.help-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    margin: 0.5rem 0;
    font-size: 0.875rem;
}

.help-item i {
    color: var(--primary-color);
}

/* ========== 资讯页面 ========== */
.news-wrapper {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.news-item {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    display: flex;
    gap: 1.5rem;
}

.news-item:hover {
    box-shadow: var(--shadow-md);
}

.news-thumbnail {
    flex-shrink: 0;
    width: 280px;
    height: 180px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.news-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.news-thumbnail:hover img {
    transform: scale(1.05);
}

.news-content-wrapper {
    flex: 1;
}

.news-featured-image {
    width: 100%;
    max-width: 800px;
    margin: 2rem auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.news-featured-image img {
    width: 100%;
    height: auto;
    display: block;
}

.news-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--primary-color);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.news-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.news-title a {
    color: var(--text-dark);
}

.news-title a:hover {
    color: var(--primary-color);
}

.news-meta {
    display: flex;
    gap: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-gray);
    margin-bottom: 1rem;
}

.news-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.news-summary {
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.news-readmore {
    color: var(--primary-color);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.news-readmore:hover {
    gap: 0.75rem;
}

.news-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar-widget {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.widget-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hot-news-list {
    list-style: none;
}

.hot-news-list li {
    display: flex;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.hot-news-list li:last-child {
    border-bottom: none;
}

.hot-rank {
    width: 24px;
    height: 24px;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-gray);
    flex-shrink: 0;
}

.hot-rank.rank-1,
.hot-rank.rank-2,
.hot-rank.rank-3 {
    background: var(--primary-color);
    color: white;
}

.hot-news-list a {
    color: var(--text-dark);
    font-size: 0.875rem;
    line-height: 1.5;
}

.hot-news-list a:hover {
    color: var(--primary-color);
}

.category-list {
    list-style: none;
}

.category-list li {
    margin: 0.75rem 0;
}

.category-list a {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    color: var(--text-dark);
    transition: all 0.3s ease;
}

.category-list a:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.category-list .count {
    color: var(--text-light);
}

.sidebar-cta {
    text-align: center;
}

.sidebar-cta p {
    color: var(--text-gray);
    margin-bottom: 1rem;
}

/* ========== 资讯详情 ========== */
.news-detail {
    background: white;
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.news-header {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.news-header .news-title {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.news-content {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-gray);
}

.news-content h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin: 2rem 0 1rem;
}

.news-content p {
    margin: 1rem 0;
}

.news-content ul,
.news-content ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.news-content li {
    margin: 0.5rem 0;
}

.news-content strong {
    color: var(--primary-color);
}

.news-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 1rem;
}

.news-tags {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.news-tags a {
    padding: 0.25rem 0.75rem;
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-gray);
}

.news-tags a:hover {
    background: var(--primary-color);
    color: white;
}

.news-share {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.news-share a {
    width: 36px;
    height: 36px;
    background: var(--bg-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    color: var(--text-gray);
}

.news-share a:hover {
    background: var(--primary-color);
    color: white;
}

.news-navigation {
    text-align: center;
    margin-top: 2rem;
}

/* ========== 关键词页面 ========== */
.keywords-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 3rem;
}

.keyword-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-dark);
    font-weight: 500;
    transition: all 0.3s ease;
}

.keyword-card:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.keyword-card i:first-child {
    font-size: 1.25rem;
}

.keyword-card i:last-child {
    font-size: 0.875rem;
}

/* 新的关键词卡片样式 */
.keywords-grid-new {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.keyword-card-new {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.75rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    color: white;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.2);
    position: relative;
    overflow: hidden;
}

.keyword-card-new::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.keyword-card-new:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.4);
}

.keyword-card-new:hover::before {
    opacity: 1;
}

.keyword-card-new:nth-child(4n+1) {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.keyword-card-new:nth-child(4n+2) {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.keyword-card-new:nth-child(4n+3) {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.keyword-card-new:nth-child(4n+4) {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.keyword-text {
    flex: 1;
    font-size: 1rem;
}

.keyword-card-new i {
    font-size: 1rem;
    opacity: 0.8;
    transition: transform 0.3s ease;
}

.keyword-card-new:hover i {
    transform: translateX(4px);
    opacity: 1;
}

.keywords-description {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.keywords-description h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin: 2rem 0 1rem;
}

.keywords-description h3:first-child {
    margin-top: 0;
}

.keywords-description p {
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.keywords-description ul,
.keywords-description ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.keywords-description li {
    color: var(--text-gray);
    margin: 0.75rem 0;
    line-height: 1.7;
}

.keywords-description strong {
    color: var(--text-dark);
}

.intro-box {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.intro-box h2 {
    font-size: 1.75rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.intro-box p {
    color: var(--text-gray);
    line-height: 1.8;
}

.keywords-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

/* 分页样式 */
.pagination-wrapper {
    margin: 3rem 0 2rem;
    display: flex;
    justify-content: center;
}

.pagination {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    color: var(--text-gray);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.page-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.page-link.active {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.page-link.prev,
.page-link.next {
    padding: 0 16px;
    font-size: 0.9rem;
}

.page-link.prev i,
.page-link.next i {
    font-size: 0.8rem;
}

.page-dots {
    color: var(--text-gray);
    padding: 0 8px;
    font-weight: bold;
}

.keyword-tag {
    padding: 0.5rem 1rem;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-dark);
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.keyword-tag:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.seo-content {
    background: white;
}

.seo-text {
    max-width: 900px;
    margin: 0 auto;
}

.seo-text h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin: 2rem 0 1rem;
}

.seo-text h3:first-child {
    margin-top: 0;
}

.seo-text p {
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.seo-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 2rem;
    flex-wrap: wrap;
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .product-detail-wrapper,
    .news-wrapper {
        grid-template-columns: 1fr;
    }
    
    .product-sidebar,
    .news-sidebar {
        order: -1;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-stats {
        gap: 2rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
        padding: 1rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 999;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
    }
    
    .nav-list li {
        width: 100%;
    }
    
    .nav-list a {
        display: block;
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
        color: var(--text-dark);
    }
    
    .nav-list a:hover,
    .nav-list a.active {
        background: var(--bg-light);
        color: var(--primary-color);
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .policy-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .info-item {
        grid-template-columns: 1fr;
    }
    
    .product-header {
        flex-direction: column;
        text-align: center;
    }
    
    .product-price-box {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .news-item {
        flex-direction: column;
    }
    
    .news-thumbnail {
        width: 100%;
        height: 200px;
    }
    
    .news-detail {
        padding: 1.5rem;
    }
    
    .news-header .news-title {
        font-size: 1.75rem;
    }
    
    .keywords-grid {
        grid-template-columns: 1fr;
    }
    
    .keywords-grid-new {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .keyword-card-new {
        padding: 1rem 1.25rem;
        font-size: 0.95rem;
    }
    
    .pagination {
        padding: 0.75rem 1rem;
        gap: 0.25rem;
    }
    
    .page-link {
        min-width: 35px;
        height: 35px;
        font-size: 0.9rem;
    }
    
    .page-link.prev,
    .page-link.next {
        padding: 0 12px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .search-input-group {
        flex-direction: column;
    }
    
    .product-actions {
        flex-direction: column;
    }
    
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
}

/* ========== 友情链接样式 ========== */
.links-section {
    background: var(--bg-light);
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.link-item {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--text-dark);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.link-item:hover {
    color: var(--primary-color);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.link-item i {
    font-size: 1.25rem;
    margin-right: 0.75rem;
    color: var(--primary-color);
    width: 20px;
    text-align: center;
}

.link-item span {
    font-weight: 500;
    font-size: 1rem;
}

/* 移动端友情链接样式 */
@media (max-width: 768px) {
    .links-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }
    
    .link-item {
        padding: 0.875rem 1rem;
        font-size: 0.9rem;
    }
    
    .link-item i {
        font-size: 1.125rem;
        margin-right: 0.5rem;
    }
}

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