/*
Theme Name: 玺禾视界
Theme URI: https://xiheshijie.com
Author: 玺禾视界
Author URI: https://xiheshijie.com
Description: 玺禾视界 - 宁夏数字传媒科技有限公司官网主题，高级浅色轻奢设计
Version: 2.0.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: xihe-shijie
Tags: business, custom-logo, custom-menu, featured-images, translation-ready
*/

/* ===== 高级轻奢配色系统 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

/* 高级灰白主色调 */
:root {
    --premium-white: #fafafa;
    --premium-gray: #f5f5f7;
    --premium-dark: #1d1d1f;
    --premium-text: #2d2d2d;
    --premium-text-light: #86868b;
    
    /* 高级渐变色 */
    --gradient-premium: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --gradient-elegant: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #6B8DD6 100%);
    --gradient-subtle: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
    --gradient-gold: linear-gradient(135deg, #c9a96e 0%, #b8956e 50%, #a67c52 100%);
    --gradient-purple: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-blue: linear-gradient(135deg, #667eea 0%, #6B8DD6 100%);
    --gradient-mint: linear-gradient(135deg, #84fab0 0%, #8fd3f4 100%);
    
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-bg-strong: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.06);
    --glass-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    --glass-shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.1);
    --glass-blur: blur(24px);
    
    --text-dark: #1d1d1f;
    --text-gray: #86868b;
    --text-light: #a1a1a6;
    
    --accent-lavender: #8B8BB5;
    --accent-sage: #9CAF88;
    --accent-blush: #C4A4A4;
}

body {
    font-family: 'Outfit', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.7;
    color: var(--text-gray);
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(102, 126, 234, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(118, 75, 162, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(76, 175, 80, 0.05) 0%, transparent 60%),
        linear-gradient(180deg, #f8fafc 0%, #eef2f7 50%, #e2e8f0 100%);
    background-attachment: fixed;
}

/* ===== 头部 - 液态玻璃 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    padding: 18px 0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.site-header.scrolled {
    padding: 12px 0;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--glass-shadow);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.site-logo {
    color: var(--text-dark);
    font-size: 24px;
    font-weight: 800;
    text-decoration: none;
    letter-spacing: -0.5px;
    background: var(--gradient-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 40px;
    margin: 0;
    padding: 0;
}

.main-nav a {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.3s;
    position: relative;
    letter-spacing: 0.5px;
}

.main-nav a:hover {
    color: #667eea;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-blue);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 2px;
}

.main-nav a:hover::after {
    width: 100%;
}

/* ===== Hero 区域 - 液态玻璃 ===== */
.hero {
    min-height: 100vh;
    background: 
        radial-gradient(ellipse at 20% 30%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(161, 140, 209, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(132, 250, 176, 0.08) 0%, transparent 60%),
        linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 20px 80px;
    position: relative;
    overflow: hidden;
}

/* 液态玻璃浮球装饰 */
.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15), rgba(161, 140, 209, 0.1));
    border-radius: 50%;
    filter: blur(60px);
    animation: floatBall 15s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, rgba(132, 250, 176, 0.15), rgba(143, 211, 244, 0.1));
    border-radius: 50%;
    filter: blur(50px);
    animation: floatBall2 18s ease-in-out infinite;
}

@keyframes floatBall {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-30px, 30px) scale(1.05); }
}

@keyframes floatBall2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(20px, -20px) scale(1.03); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    padding: 10px 22px;
    border-radius: 50px;
    font-size: 13px;
    color: var(--text-gray);
    margin-bottom: 30px;
    box-shadow: var(--glass-shadow);
}

.hero-badge span {
    width: 8px;
    height: 8px;
    background: var(--gradient-blue);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero h1 {
    font-size: clamp(36px, 7vw, 72px);
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 24px;
    line-height: 1.1;
    letter-spacing: -2px;
}

.hero h1 span {
    background: var(--gradient-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-gray);
    margin-bottom: 45px;
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-blue);
    color: white;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(102, 126, 234, 0.5);
}

.btn-secondary {
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    color: var(--text-dark);
    box-shadow: var(--glass-shadow);
}

.btn-secondary:hover {
    background: white;
    transform: translateY(-3px);
}

/* ===== 通用区块 ===== */
.section {
    padding: 120px 20px;
    position: relative;
}

.section-dark {
    background: linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
}

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

.section-title {
    text-align: center;
    margin-bottom: 70px;
}

.section-title h2 {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.section-title p {
    font-size: 17px;
    color: var(--text-gray);
    max-width: 550px;
    margin: 0 auto;
}

/* ===== 关于我们 - 液态玻璃卡片 ===== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.about-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 40px 32px;
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: var(--glass-shadow);
}

.about-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-purple);
    transform: scaleX(0);
    transition: transform 0.4s;
}

.about-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(31, 38, 135, 0.2);
}

.about-card:hover::before {
    transform: scaleX(1);
}

.about-card-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-mint);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 28px;
}

.about-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.about-card p {
    color: var(--text-gray);
    line-height: 1.7;
    font-size: 14px;
}

/* ===== 统计数据 - 高级浅色 ===== */
.stats {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 90px 20px;
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0,0,0,0.08), transparent);
}

.stats::after {
    content: '';
    position: absolute;
    bottom: -80px;
    right: -80px;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}

.stat-item {
    position: relative;
}

.stat-item::after {
    content: '';
    position: absolute;
    right: -20px;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 50px;
    background: rgba(0,0,0,0.08);
}

.stat-item:last-child::after {
    display: none;
}

.stat-item h3 {
    font-size: clamp(40px, 5vw, 56px);
    font-weight: 700;
    background: var(--gradient-elegant);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 6px;
    letter-spacing: -2px;
}

.stat-item p {
    font-size: 13px;
    color: var(--text-gray);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 500;
}

/* ===== 项目案例 - 液态玻璃 ===== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--glass-shadow);
    cursor: pointer;
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(31, 38, 135, 0.2);
}

.case-card:hover .case-info h3 {
    color: #667eea;
}

.case-image {
    height: 220px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.1) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.case-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(161, 140, 209, 0.15));
    opacity: 0;
    transition: opacity 0.4s;
}

.case-card:hover .case-image::before {
    opacity: 1;
}

.case-placeholder {
    font-size: 56px;
    opacity: 0.6;
    transition: all 0.4s;
    filter: drop-shadow(0 4px 8px rgba(31, 38, 135, 0.2));
}

.case-card:hover .case-placeholder {
    transform: scale(1.1);
    opacity: 0.8;
}

.case-info {
    padding: 28px;
    background: white;
}

.case-info h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.case-info p {
    font-size: 13px;
    color: var(--text-gray);
    display: flex;
    align-items: center;
    gap: 8px;
}

.case-info p::before {
    content: '';
    width: 4px;
    height: 4px;
    background: #667eea;
    border-radius: 50%;
}

/* 案例链接按钮 */
.case-link-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
    text-decoration: none;
    z-index: 10;
}

.case-card:hover .case-link-overlay {
    opacity: 1;
}

.case-link-icon {
    font-size: 32px;
}

.case-external-link {
    display: inline-block;
    margin-top: 10px;
    font-size: 13px;
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.case-external-link:hover {
    color: #764ba2;
}

/* ===== 案例详情弹窗 ===== */
.case-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.case-modal-overlay.active {
    display: flex;
    opacity: 1;
}

.case-modal {
    background: white;
    border-radius: 20px;
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.case-modal-overlay.active .case-modal {
    transform: scale(1);
}

.case-modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--premium-dark);
    z-index: 10;
    transition: all 0.3s;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.case-modal-close:hover {
    background: var(--premium-dark);
    color: white;
    transform: rotate(90deg);
}

.case-modal-image {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 120px;
}

.case-modal-content {
    padding: 40px;
}

.case-modal-category {
    display: inline-block;
    background: var(--gradient-elegant);
    color: white;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.case-modal-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--premium-dark);
    margin-bottom: 20px;
    line-height: 1.3;
}

.case-modal-desc {
    color: var(--text-gray);
    line-height: 1.8;
    margin-bottom: 30px;
}

.case-modal-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 30px;
    padding: 24px;
    background: var(--premium-gray);
    border-radius: 12px;
}

.case-modal-detail-item h4 {
    font-size: 12px;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.case-modal-detail-item p {
    font-size: 15px;
    color: var(--premium-dark);
    font-weight: 600;
}

.case-modal-actions {
    display: flex;
    gap: 16px;
}

.case-modal-btn {
    flex: 1;
    padding: 16px 24px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.case-modal-btn-primary {
    background: var(--gradient-elegant);
    color: white;
}

.case-modal-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102, 126, 234, 0.4);
}

.case-modal-btn-secondary {
    background: white;
    color: var(--premium-dark);
    border: 2px solid var(--premium-gray);
}

.case-modal-btn-secondary:hover {
    border-color: var(--premium-dark);
}

.case-card-clickable {
    cursor: pointer;
}

.case-card-hover-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s;
    z-index: 5;
}

.case-card:hover .case-card-hover-icon {
    opacity: 1;
}

.case-card-hover-icon svg {
    width: 28px;
    height: 28px;
    color: var(--premium-dark);
}

/* ===== 服务项目 - 液态玻璃 ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.service-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 32px 24px;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    text-align: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--glass-shadow);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(31, 38, 135, 0.2);
}

.service-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-purple);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 26px;
    box-shadow: 0 8px 20px rgba(161, 140, 209, 0.4);
}

.service-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.service-card p {
    font-size: 13px;
    color: var(--text-gray);
}

/* ===== 联系 ===== */
.contact-section {
    background: linear-gradient(180deg, #eef2f7 0%, #f8fafc 100%);
    padding: 100px 20px;
}

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

.contact-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 36px 28px;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    text-align: center;
    transition: all 0.3s;
    box-shadow: var(--glass-shadow);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(31, 38, 135, 0.15);
}

.contact-icon {
    width: 52px;
    height: 52px;
    background: var(--gradient-mint);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 22px;
}

.contact-card h4 {
    font-size: 14px;
    color: var(--text-gray);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-card p {
    color: var(--text-dark);
    font-weight: 500;
}

.contact-card-clickable {
    cursor: pointer;
    transition: all 0.3s ease;
}

.contact-card-clickable:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.12);
}

.contact-card-clickable:hover .contact-card-hint {
    color: var(--gradient-elegant);
}

.contact-card-hint {
    display: block;
    margin-top: 6px;
    font-size: 11px;
    color: var(--text-light);
    transition: color 0.3s;
}

/* ===== 页脚 - 高级浅色 ===== */
.site-footer {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-top: 1px solid rgba(0,0,0,0.06);
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: -80px;
    left: -80px;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.06) 0%, transparent 70%);
    border-radius: 50%;
}

.site-footer::after {
    content: '';
    position: absolute;
    bottom: -60px;
    right: -60px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(139, 139, 181, 0.04) 0%, transparent 70%);
    border-radius: 50%;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 30px 30px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.footer-brand h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--premium-dark);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.footer-brand p {
    color: var(--text-gray);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 24px;
}

/* 社交媒体图标 */
.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 44px;
    height: 44px;
    background: white;
    border: 1px solid rgba(0,0,0,0.08);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-gray);
    text-decoration: none;
    transition: all 0.3s;
    font-size: 18px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.footer-social a:hover {
    background: white;
    border-color: rgba(0,0,0,0.15);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.footer-social a.wechat:hover { color: #07c160; }
.footer-social a.douyin:hover { color: #fe2c55; }
.footer-social a.xiaohongshu:hover { color: #FF2442; }

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--premium-dark);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-col li {
    margin-bottom: 12px;
}

.footer-col a {
    color: var(--text-gray);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
}

.footer-col a:hover {
    color: var(--premium-dark);
    padding-left: 5px;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 25px 30px;
    border-top: 1px solid rgba(0,0,0,0.08);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 30px;
    font-size: 13px;
    color: var(--text-gray);
    position: relative;
    z-index: 1;
    flex-wrap: wrap;
    text-align: center;
}

.footer-bottom a {
    color: var(--text-gray);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-bottom a:hover {
    color: var(--premium-dark);
}

.footer-icp {
    padding: 4px 12px;
    background: rgba(255,255,255,0.1);
    border-radius: 20px;
    font-size: 12px;
}

/* ===== 移动端菜单 ===== */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 20px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1000001;
    position: relative;
}
.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--premium-dark);
    transition: all 0.3s;
}
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    background: rgba(255,255,255,0.99);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000000;
    padding: 80px 30px 30px;
    flex-direction: column;
    justify-content: flex-start;
    overflow-y: auto;
}
.mobile-menu.active { 
    display: flex !important; 
    animation: slideDown 0.3s ease;
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}
.mobile-menu-close {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 32px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--premium-dark);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000001;
}
.mobile-menu nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: center;
    margin-top: 20px;
}
.mobile-menu nav a {
    font-size: 20px;
    font-weight: 600;
    color: var(--premium-dark);
    text-decoration: none;
    padding: 16px;
    transition: color 0.3s, background 0.3s;
    border-radius: 12px;
}
.mobile-menu nav a:hover { 
    color: #667eea; 
    background: rgba(102, 126, 234, 0.1);
}
body.menu-open { 
    overflow: hidden; 
    height: 100vh;
    height: 100dvh;
}

/* ===== 响应式 ===== */
@media screen and (max-width: 1024px) {
    .about-grid { grid-template-columns: repeat(2, 1fr); }
    .services-grid { grid-template-columns: repeat(2, 1fr); }
    .cases-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: repeat(2, 1fr); gap: 40px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
    .stat-item::after { display: none; }
    .mobile-menu-btn { display: flex; }
}

@media screen and (max-width: 768px) {
    * { box-sizing: border-box; max-width: 100%; }
    html, body { max-width: 100vw; overflow-x: hidden; }
    
    body {
        font-size: 14px;
        line-height: 1.6;
    }
    
    .site-header { 
        padding: 12px 0; 
        background: rgba(255, 255, 255, 0.95) !important;
    }
    .header-inner { padding: 0 15px; justify-content: space-between; }
    .site-logo { font-size: 14px; }
    .main-nav { display: none; }
    
    .hero { 
        padding: 80px 15px 50px; 
        min-height: auto;
        background: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%) !important;
    }
    .hero-badge { margin-bottom: 20px; padding: 6px 16px; font-size: 12px; }
    .hero h1 { 
        font-size: 26px !important; 
        margin-bottom: 16px; 
        letter-spacing: -1px; 
    }
    .hero p { margin-bottom: 30px; font-size: 14px; }
    .hero-btns { flex-direction: column; align-items: center; gap: 12px; }
    .btn { 
        width: 100%; 
        max-width: 260px; 
        justify-content: center;
        padding: 14px 28px;
        font-size: 14px;
    }
    
    .section { padding: 50px 15px; }
    .container { padding: 0 15px; max-width: 100%; }
    .section-title { margin-bottom: 30px; }
    .section-title h2 { font-size: 22px; margin-bottom: 10px; }
    .section-title p { font-size: 14px; }
    
    .about-grid, .services-grid, .cases-grid, .stats-grid, .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .about-card, .service-card, .case-card, .contact-card {
        padding: 20px 16px;
        border-radius: 12px;
    }
    
    .about-card-icon { width: 48px; height: 48px; font-size: 20px; margin-bottom: 14px; }
    .about-card h3 { font-size: 16px; }
    .about-card p { font-size: 13px; }
    
    .service-icon { width: 44px; height: 44px; font-size: 20px; }
    .service-card h3 { font-size: 14px; }
    .service-card p { font-size: 12px; }
    
    .case-image { height: 160px; }
    .case-info { padding: 16px; }
    .case-info h3 { font-size: 15px; }
    .case-info p { font-size: 12px; }
    
    .stats { padding: 40px 15px; }
    .stat-item h3 { font-size: 28px; }
    .stat-item p { font-size: 11px; }
    
    .contact-wrapper { padding: 0 15px; }
    .contact-item { 
        padding: 16px; 
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    .contact-icon { 
        width: 40px; 
        height: 40px; 
        font-size: 18px; 
    }
    .contact-text { font-size: 13px; }
    
    .footer-inner { 
        grid-template-columns: 1fr; 
        gap: 24px; 
        padding: 30px 15px 20px; 
        text-align: center; 
    }
    .footer-brand { text-align: center; }
    .footer-brand h3 { font-size: 16px; }
    .footer-brand p { font-size: 13px; }
    .footer-social { justify-content: center; }
    .footer-social a { width: 40px; height: 40px; }
    .footer-col h4 { font-size: 13px; margin-bottom: 14px; }
    .footer-col a { font-size: 13px; }
    .footer-bottom { 
        flex-direction: column; 
        gap: 8px; 
        text-align: center; 
        padding: 20px 15px;
        font-size: 12px;
    }
    
    .footer-icp { font-size: 11px; }
}