/* ================================
   全局样式与变量
   ================================ */

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

:root {
    /* 主色调 */
    --primary-color: #1a56db;
    --primary-dark: #1e3a8a;
    --primary-light: #3b82f6;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #1a56db 0%, #3b82f6 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    
    /* 中性色 */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* 文本颜色 */
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    
    /* 阴影 */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 边框圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--color-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.loading {
    overflow: hidden;
}

/* ================================
   预加载动画
   ================================ */

.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hide {
    opacity: 0;
    visibility: hidden;
}

.preloader-content {
    text-align: center;
    position: relative;
}

/* 添加装饰性背景 */
.preloader-content::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: preloaderPulse 3s ease-in-out infinite;
    z-index: -1;
}

@keyframes preloaderPulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.6;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 1;
    }
}

.loader-logo {
    margin-bottom: 2rem;
    animation: fadeInScale 0.8s ease-out;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.loader-text {
    font-size: 3rem;
    font-weight: 900;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.loader-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
    font-weight: 500;
}

.loader-bar {
    width: 300px;
    height: 4px;
    background: var(--color-gray-200);
    border-radius: 2px;
    overflow: hidden;
    margin: 0 auto;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

.loader-progress {
    height: 100%;
    background: var(--gradient-secondary);
    border-radius: 2px;
    animation: loading 2s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(102, 126, 234, 0.3);
}

@keyframes loading {
    0% {
        width: 0;
        margin-left: 0;
    }
    50% {
        width: 80%;
        margin-left: 10%;
    }
    100% {
        width: 100%;
        margin-left: 0;
    }
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ================================
   导航栏
   ================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all var(--transition-base);
}

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

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 0;
}

.logo {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.05em;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 2.5rem;
}

.nav-menu li {
    position: relative;
}

.nav-menu li a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: color var(--transition-base);
    position: relative;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-menu li a i {
    font-size: 0.75rem;
    transition: transform 0.3s ease;
}

.nav-menu li.dropdown:hover > a i {
    transform: rotate(180deg);
}

.nav-menu li a:hover {
    color: var(--primary-color);
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-base);
}

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

/* 下拉菜单 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 220px;
    padding: 0.75rem 0;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1000;
    list-style: none;
    border: 1px solid var(--color-gray-200);
    margin-top: 0.5rem;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu li a {
    padding: 0.75rem 1.5rem;
    display: block;
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all 0.3s ease;
    gap: 0;
}

.dropdown-menu li a::after {
    display: none;
}

.dropdown-menu li a:hover {
    background: var(--color-gray-50);
    color: var(--primary-color);
    padding-left: 1.75rem;
}

.btn-primary {
    background: var(--gradient-secondary);
    color: white !important;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.btn-primary::after {
    display: none !important;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 0.375rem;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

/* ================================
   英雄区域
   ================================ */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 0 80px;
    overflow: hidden;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

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

.hero-gradient {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at top, rgba(102, 126, 234, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at bottom right, rgba(118, 75, 162, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at bottom left, rgba(240, 147, 251, 0.06) 0%, transparent 50%);
    animation: gradientShift 20s ease-in-out infinite;
}

@keyframes gradientShift {
    0%, 100% { opacity: 1; transform: scale(1) rotate(0deg); }
    50% { opacity: 0.6; transform: scale(1.05) rotate(3deg); }
}

/* 全球地图背景 */
.hero-bg::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120%;
    height: 120%;
    background-image: 
        radial-gradient(circle at 30% 40%, rgba(102, 126, 234, 0.03) 0%, transparent 40%),
        radial-gradient(circle at 70% 60%, rgba(102, 126, 234, 0.03) 0%, transparent 40%);
    opacity: 0.8;
    pointer-events: none;
}

.hero-bg::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 50px, rgba(102, 126, 234, 0.02) 50px, rgba(102, 126, 234, 0.02) 51px),
        repeating-linear-gradient(90deg, transparent, transparent 50px, rgba(102, 126, 234, 0.02) 50px, rgba(102, 126, 234, 0.02) 51px);
    background-size: 100% 100%;
    opacity: 0.4;
    pointer-events: none;
}

.hero-particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.hero-map {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 1;
}

.map-svg {
    width: 100%;
    height: 100%;
    max-width: 1400px;
}

.particle {
    position: absolute;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.3) 0%, rgba(102, 126, 234, 0.15) 50%, transparent 100%);
    border-radius: 50%;
    animation: float-particle 20s infinite ease-in-out;
    box-shadow: 0 0 40px rgba(102, 126, 234, 0.2);
    filter: blur(1px);
}

.particle:nth-child(1) {
    width: 120px;
    height: 120px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
    animation-duration: 15s;
}

.particle:nth-child(2) {
    width: 100px;
    height: 100px;
    top: 20%;
    right: 15%;
    animation-delay: 2s;
    animation-duration: 18s;
}

.particle:nth-child(3) {
    width: 150px;
    height: 150px;
    bottom: 20%;
    left: 15%;
    animation-delay: 4s;
    animation-duration: 20s;
}

.particle:nth-child(4) {
    width: 110px;
    height: 110px;
    bottom: 30%;
    right: 20%;
    animation-delay: 6s;
    animation-duration: 16s;
}

.particle:nth-child(5) {
    width: 90px;
    height: 90px;
    top: 40%;
    left: 5%;
    animation-delay: 1s;
    animation-duration: 19s;
}

.particle:nth-child(6) {
    width: 130px;
    height: 130px;
    top: 60%;
    right: 10%;
    animation-delay: 3s;
    animation-duration: 17s;
}

@keyframes float-particle {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.8;
    }
    25% {
        transform: translate(30px, -20px) scale(1.1);
        opacity: 1;
    }
    50% {
        transform: translate(-20px, 30px) scale(0.9);
        opacity: 0.7;
    }
    75% {
        transform: translate(25px, 15px) scale(1.05);
        opacity: 0.9;
    }
}

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

.hero-content {
    animation: fadeInLeft 1s ease-out;
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: 2rem;
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 2rem;
    backdrop-filter: blur(10px);
    animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.3);
    }
    50% {
        box-shadow: 0 0 0 10px rgba(102, 126, 234, 0);
    }
}

.hero-badge i {
    color: #667eea;
    animation: badgeIcon 2s ease-in-out infinite;
}

@keyframes badgeIcon {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.hero-title {
    font-size: 4.5rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

.title-line {
    display: block;
    background: linear-gradient(135deg, #1e293b 0%, #475569 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-brand {
    margin-bottom: 2rem;
}

.brand-logo {
    font-size: 2.5rem;
    font-weight: 900;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.brand-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero-features {
    display: flex;
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-weight: 500;
}

.feature-item i {
    color: #667eea;
    font-size: 1.125rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.btn-hero {
    padding: 1rem 2rem;
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
}

.btn-hero.btn-primary {
    background: var(--gradient-secondary);
    color: white;
    box-shadow: 0 10px 30px -5px rgba(102, 126, 234, 0.5);
    position: relative;
    overflow: hidden;
}

.btn-hero.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn-hero.btn-primary:hover::before {
    left: 100%;
}

.btn-hero.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px -5px rgba(102, 126, 234, 0.7);
}

.btn-hero.btn-primary:active {
    transform: translateY(0);
}

.btn-hero.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.btn-hero.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: rgba(102, 126, 234, 0.05);
    transition: width 0.4s ease;
    z-index: -1;
}

.btn-hero.btn-secondary:hover::before {
    width: 100%;
}

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

.btn-hero.btn-secondary:active {
    transform: translateY(0);
}

.hero-partners {
    animation: fadeIn 1s ease-out 0.5s both;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.partners-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
}

.partners-logos {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.partner-item {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    transition: all var(--transition-base);
    cursor: default;
    position: relative;
}

.partner-item::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gradient-secondary);
    transition: width var(--transition-base);
}

.partner-item:hover {
    color: var(--primary-color);
}

.partner-item:hover::after {
    width: 100%;
}

.partner-divider {
    color: var(--text-light);
}

/* 右侧视觉元素 */

.hero-visual {
    position: relative;
    height: 600px;
    animation: fadeInRight 1s ease-out 0.3s both;
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.visual-card {
    position: absolute;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(102, 126, 234, 0.15);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    isolation: isolate;
    user-select: none;
    pointer-events: none;
}

.visual-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(102, 126, 234, 0.02),
        rgba(118, 75, 162, 0.02)
    );
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: -1;
    border-radius: inherit;
}

.visual-card:hover::before {
    opacity: 1;
}

.visual-card .card-icon,
.visual-card .card-content {
    position: relative;
}

.visual-card:hover {
    transform: translateY(-8px) translateZ(0);
    background: white;
    border-color: var(--primary-color);
    box-shadow: 0 20px 50px rgba(102, 126, 234, 0.25);
}

.card-1 {
    top: 10%;
    left: 10%;
    animation: float-1 6s ease-in-out infinite;
    will-change: transform;
}

.card-2 {
    top: 45%;
    right: 10%;
    animation: float-2 7s ease-in-out infinite 1s;
    will-change: transform;
}

.card-3 {
    bottom: 15%;
    left: 5%;
    animation: float-3 8s ease-in-out infinite 2s;
    will-change: transform;
}

@keyframes float-1 {
    0%, 100% { 
        transform: translateY(0) translateZ(0);
    }
    50% { 
        transform: translateY(-15px) translateZ(0);
    }
}

@keyframes float-2 {
    0%, 100% { 
        transform: translateY(0) translateZ(0);
    }
    50% { 
        transform: translateY(-15px) translateZ(0);
    }
}

@keyframes float-3 {
    0%, 100% { 
        transform: translateY(0) translateZ(0);
    }
    50% { 
        transform: translateY(-15px) translateZ(0);
    }
}

.card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-secondary);
    border-radius: var(--radius-md);
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
    position: relative;
    overflow: hidden;
}

.card-icon::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        45deg,
        transparent 30%,
        rgba(255, 255, 255, 0.3) 50%,
        transparent 70%
    );
    animation: iconShine 3s linear infinite;
}

@keyframes iconShine {
    0% {
        transform: rotate(0deg) translate(-50%, -50%);
    }
    100% {
        transform: rotate(360deg) translate(-50%, -50%);
    }
}

.card-content {
    flex: 1;
}

.card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.card-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.card-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    font-size: 0.6875rem;
    font-weight: 800;
    padding: 0.375rem 0.75rem;
    border-radius: 1.25rem;
    letter-spacing: 0.05em;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(245, 87, 108, 0.4);
    animation: pulse-badge 2s ease-in-out infinite;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    white-space: nowrap;
}

.card-badge i {
    font-size: 0.75rem;
    animation: flicker-fire 1.5s ease-in-out infinite;
}

@keyframes pulse-badge {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 4px 12px rgba(245, 87, 108, 0.4);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 6px 16px rgba(245, 87, 108, 0.6);
    }
}

@keyframes flicker-fire {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.1);
    }
}

.visual-stats {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 2rem;
}

.stat-item-hero {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: 1rem 1.5rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat-number-hero {
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.stat-label-hero {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.visual-decoration {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.15) 0%, rgba(118, 75, 162, 0.1) 50%, transparent 100%);
    filter: blur(50px);
}

.decoration-1 {
    width: 250px;
    height: 250px;
    top: 0;
    right: 0;
    animation: pulse 4s ease-in-out infinite;
}

.decoration-2 {
    width: 200px;
    height: 200px;
    bottom: 10%;
    right: 20%;
    animation: pulse 5s ease-in-out infinite 1s;
}

.decoration-3 {
    width: 220px;
    height: 220px;
    top: 40%;
    left: 0;
    animation: pulse 6s ease-in-out infinite 2s;
}

@keyframes pulse {
    0%, 100% { 
        opacity: 0.3;
        transform: scale(1);
    }
    50% { 
        opacity: 0.6;
        transform: scale(1.2);
    }
}

/* 滚动指示器 */

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
    text-align: center;
}

.scroll-text {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
}

.scroll-indicator {
    display: flex;
    justify-content: center;
}

.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-gray-300);
    border-radius: 12px;
    position: relative;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollWheel {
    0%, 100% {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
    50% {
        opacity: 0.5;
        transform: translateX(-50%) translateY(12px);
    }
}

/* ================================
   数据统计区域
   ================================ */

.stats-section {
    padding: 4rem 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
}

.stats-wrapper {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    align-items: center;
    gap: 2rem;
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.stat-sublabel {
    font-size: 0.75rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 60px;
    background: var(--color-gray-200);
}

/* ================================
   通用区域样式
   ================================ */

section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: var(--color-gray-100);
    color: var(--text-secondary);
    border-radius: 2rem;
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.section-header h2 {
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-primary);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ================================
   服务导航
   ================================ */

.services-nav {
    background: white;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 75px;
    z-index: 100;
    transition: all var(--transition-base);
}

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

.services-nav-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.service-nav-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.875rem;
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-200);
    background: white;
}

.service-nav-item i {
    font-size: 1rem;
}

.service-nav-item:hover {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.05);
    border-color: var(--primary-color);
}

.service-nav-item.active {
    color: white;
    background: var(--gradient-secondary);
    box-shadow: var(--shadow-sm);
    border-color: transparent;
}

/* ================================
   合作伙伴
   ================================ */

.partners {
    background: var(--color-gray-50);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.partner-card {
    background: white;
    padding: 2.5rem 2rem;
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-xs);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-200);
    position: relative;
    overflow: hidden;
}

.partner-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(102, 126, 234, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.partner-card:hover::after {
    opacity: 1;
}

.partner-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.partner-card:hover .logo-text {
    transform: scale(1.05);
}

.logo-text {
    transition: transform var(--transition-base);
}

.partner-logo {
    margin-bottom: 1.5rem;
}

.logo-text {
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.partner-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.partner-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ================================
   产品服务
   ================================ */

.services {
    background: var(--color-white);
}

.service-category {
    margin-bottom: 5rem;
}

.service-category:last-child {
    margin-bottom: 0;
}

.service-header {
    margin-bottom: 2.5rem;
}

.service-icon-wrapper {
    display: none;
}

.service-header-content {
    max-width: 100%;
}

.service-header p {
    font-size: 0.8125rem;
    color: var(--text-light);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 0.75rem;
}

.service-header h3 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.service-desc {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    font-weight: 400;
    line-height: 1.6;
}

/* ================================
   面包屑导航
   ================================ */

.breadcrumb {
    background: var(--color-gray-50);
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.breadcrumb .container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

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

.breadcrumb .separator {
    color: var(--color-gray-400);
}

.breadcrumb .current {
    color: var(--text-primary);
    font-weight: 500;
}

/* ================================
   详情页头部
   ================================ */

.page-header {
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(102, 126, 234, 0.05), transparent 70%);
    pointer-events: none;
}

.page-header-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.page-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
}

.page-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.page-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

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

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.0625rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 160px;
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 0.875rem 2rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

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

/* 功能亮点 */
.feature-highlights {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.highlight-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.highlight-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.75rem;
    flex-shrink: 0;
}

.highlight-text {
    flex: 1;
}

.highlight-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.highlight-label {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* ================================
   详情页内容区
   ================================ */

.detail-section {
    padding: 6rem 0;
}

.bg-light {
    background: var(--color-gray-50);
}

.service-detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.service-detail-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
    transition: all 0.3s ease;
}

.service-detail-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.service-detail-icon {
    width: 72px;
    height: 72px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.service-detail-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.service-detail-card > p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.feature-list li i {
    color: var(--primary-color);
    font-size: 0.875rem;
}

/* ================================
   合作伙伴区域
   ================================ */

.partners-section {
    padding: 5rem 0;
}

.partner-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.partner-logo-item {
    text-align: center;
}

.partner-logo-item .logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.partner-logo-item p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ================================
   CTA区域
   ================================ */

.cta-section {
    background: var(--gradient-secondary);
    padding: 5rem 0;
    text-align: center;
    color: white;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

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

.cta-section .btn-primary {
    background: white !important;
    color: var(--primary-color) !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    font-weight: 700;
}

.cta-section .btn-primary:hover {
    background: var(--color-gray-100) !important;
    color: var(--primary-color) !important;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

.cta-section .btn-secondary {
    background: transparent !important;
    color: white !important;
    border-color: white;
    border-width: 2px;
    font-weight: 600;
}

.cta-section .btn-secondary:hover {
    background: white !important;
    color: var(--primary-color) !important;
    transform: translateY(-3px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* ================================
   关于我们页面
   ================================ */

.about-hero {
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
    padding: 6rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.about-hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(102, 126, 234, 0.08), transparent 70%);
    pointer-events: none;
}

.about-hero-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.about-hero .page-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
}

.about-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.about-hero p {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.about-stats {
    padding: 4rem 0;
    background: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 3rem;
}

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

.stat-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: var(--primary-color);
    font-size: 2rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* 公司优势 */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

.advantage-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
    transition: all 0.3s ease;
    position: relative;
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.advantage-number {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-size: 3rem;
    font-weight: 800;
    color: rgba(102, 126, 234, 0.1);
}

.advantage-icon {
    width: 72px;
    height: 72px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.advantage-card h3 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.advantage-card p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 发展历程 */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--color-gray-300);
}

.timeline-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
    position: relative;
}

.timeline-item:nth-child(even) .timeline-year {
    order: 2;
    text-align: left;
}

.timeline-item:nth-child(even) .timeline-content {
    order: 1;
    text-align: right;
}

.timeline-year {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    position: relative;
}

.timeline-year::after {
    content: '';
    position: absolute;
    right: -1.5rem;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: 0 0 0 2px var(--primary-color);
}

.timeline-item:nth-child(even) .timeline-year {
    justify-content: flex-start;
}

.timeline-item:nth-child(even) .timeline-year::after {
    right: auto;
    left: -1.5rem;
}

.timeline-content {
    padding: 2rem;
    background: white;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
}

.timeline-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.timeline-content p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 合作伙伴徽章 */
.partner-logo-item {
    position: relative;
}

.partner-badge {
    display: inline-block;
    margin-top: 0.5rem;
    padding: 0.375rem 0.875rem;
    background: var(--gradient-secondary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-md);
}

/* ================================
   响应式 - 关于页面
   ================================ */

@media (max-width: 1024px) {
    .about-hero h1 {
        font-size: 2.5rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .about-hero {
        padding: 4rem 0;
    }
    
    .about-hero .page-tag {
        font-size: 0.75rem;
    }
    
    .about-hero h1 {
        font-size: 2rem;
    }
    
    .about-hero p {
        font-size: 1rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline::before {
        left: 0;
    }
    
    .timeline-item {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .timeline-year {
        justify-content: flex-start !important;
        font-size: 2rem;
    }
    
    .timeline-year::after {
        left: -1.5rem !important;
        right: auto !important;
    }
    
    .timeline-content {
        text-align: left !important;
    }
    
    .timeline-item:nth-child(even) .timeline-year,
    .timeline-item:nth-child(even) .timeline-content {
        order: 0;
    }
}

/* ================================
   联系页面
   ================================ */

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h2,
.contact-form-wrapper h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.contact-info > p,
.contact-form-wrapper > p {
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-method {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-200);
    transition: all 0.3s ease;
}

.contact-method:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.method-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.method-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.method-info p {
    font-size: 1rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.method-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.contact-form-wrapper {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
    box-shadow: var(--shadow-sm);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem 1.125rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.field-error {
    color: #ef4444;
    font-size: 0.8125rem;
    margin-top: 0.375rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.field-error::before {
    content: '⚠';
    font-size: 0.875rem;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

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

/* ================================
   定价页面
   ================================ */

.pricing-hero {
    background: linear-gradient(135deg, #f8f9ff 0%, #f0f2ff 100%);
    padding: 5rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.pricing-hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(102, 126, 234, 0.08), transparent 70%);
    pointer-events: none;
}

.pricing-hero-content {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.pricing-hero .page-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
}

.pricing-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.pricing-hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.pricing-section {
    padding: 5rem 0;
}

.pricing-header {
    text-align: center;
    margin-bottom: 3rem;
}

.pricing-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.pricing-header h2 i {
    color: var(--primary-color);
}

.pricing-header p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
}

/* 定价卡片 */
.pricing-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    border: 2px solid var(--color-gray-200);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    transform: scale(1.05);
}

.pricing-card.featured:hover {
    transform: scale(1.05) translateY(-8px);
}

.pricing-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-secondary);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.pricing-tier {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.pricing-price {
    margin-bottom: 2rem;
}

.price-amount {
    font-size: 3rem;
    font-weight: 800;
    color: var(--primary-color);
}

.price-unit {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-left: 0.5rem;
}

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

.pricing-features li {
    padding: 0.875rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--color-gray-100);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

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

.pricing-features li i {
    color: var(--primary-color);
    font-size: 1rem;
}

.pricing-btn {
    display: block;
    width: 100%;
    padding: 1rem;
    background: var(--gradient-secondary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: center;
}

.pricing-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pricing-card:not(.featured) .pricing-btn {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.pricing-card:not(.featured) .pricing-btn:hover {
    background: var(--primary-color);
    color: white;
}

/* 定价表格 */
.pricing-table {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.pricing-table table {
    width: 100%;
    border-collapse: collapse;
}

.pricing-table thead {
    background: var(--gradient-secondary);
    color: white;
}

.pricing-table th {
    padding: 1.25rem;
    font-weight: 600;
    text-align: center;
}

.pricing-table td {
    padding: 1.25rem;
    text-align: center;
    border-bottom: 1px solid var(--color-gray-200);
}

.pricing-table tbody tr:last-child td {
    border-bottom: none;
}

.pricing-table tbody tr:hover {
    background: var(--color-gray-50);
}

.highlight-row {
    background: rgba(102, 126, 234, 0.05) !important;
    font-weight: 600;
}

.highlight-row td {
    color: var(--primary-color);
}

/* FAQ */
.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    padding: 2rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.faq-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.faq-item h3 i {
    color: var(--primary-color);
}

.faq-item p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ================================
   响应式 - 定价页面
   ================================ */

@media (max-width: 1024px) {
    .pricing-hero h1 {
        font-size: 2.5rem;
    }
    
    .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: none;
    }
    
    .pricing-card.featured:hover {
        transform: translateY(-8px);
    }
    
    .faq-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .pricing-hero {
        padding: 3rem 0;
    }
    
    .pricing-hero h1 {
        font-size: 2rem;
    }
    
    .pricing-table {
        overflow-x: auto;
    }
    
    .pricing-table table {
        min-width: 600px;
    }
}

/* ================================
   响应式 - 联系页面
   ================================ */

@media (max-width: 1024px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

/* ================================
   响应式 - 详情页
   ================================ */

@media (max-width: 1024px) {
    .page-header-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .page-title {
        font-size: 2.5rem;
    }
    
    .service-detail-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 3rem 0;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .page-description {
        font-size: 1rem;
    }
    
    .page-actions {
        flex-direction: column;
    }
    
    .page-actions .btn-primary,
    .page-actions .btn-secondary {
        width: 100%;
        text-align: center;
    }
    
    .feature-highlights {
        gap: 1rem;
    }
    
    .highlight-item {
        padding: 1rem;
    }
    
    .highlight-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }
    
    .highlight-value {
        font-size: 1.5rem;
    }
    
    .service-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-content h2 {
        font-size: 1.75rem;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: stretch;
    }
}

/* ================================
   核心优势横幅
   ================================ */

.advantages-banner {
    background: white;
    padding: 4rem 0;
    border-top: 1px solid var(--color-gray-200);
    border-bottom: 1px solid var(--color-gray-200);
}

.advantages-grid-banner {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.advantage-item {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 2rem;
    background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.advantage-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-secondary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 12px 30px rgba(102, 126, 234, 0.15);
}

.advantage-item:hover::before {
    opacity: 1;
}

.advantage-icon-wrapper {
    width: 56px;
    height: 56px;
    background: var(--gradient-secondary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.advantage-item:hover .advantage-icon-wrapper {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.3);
}

.advantage-content h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
}

.advantage-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* 响应式 */
@media (max-width: 1024px) {
    .advantages-grid-banner {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .advantages-banner {
        padding: 3rem 0;
    }
    
    .advantages-grid-banner {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .advantage-item {
        padding: 1.5rem;
    }
}

/* ================================
   服务聚合中心 (Services Hub with Tabs)
   ================================ */

.services-hub {
    background: var(--color-white);
    padding: 8rem 0;
}

/* Tab 导航栏 */
.hub-tabs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 4rem;
    flex-wrap: wrap;
    position: relative;
}

.hub-tab-btn {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 1.125rem 2.25rem;
    background: white;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    color: var(--text-secondary);
    font-size: 1.0625rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.hub-tab-btn i {
    font-size: 1.25rem;
    transition: transform 0.3s ease;
}

.hub-tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.hub-tab-btn.active {
    background: var(--gradient-secondary);
    border-color: transparent;
    color: white;
    box-shadow: var(--shadow-md);
}

.hub-tab-btn.active i {
    transform: scale(1.1);
}

/* Tab 内容区域 */
.hub-content {
    position: relative;
    min-height: 500px;
}

.hub-pane {
    display: none;
    animation: fadeInUp 0.5s ease;
}

.hub-pane.active {
    display: block;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Pane 顶部介绍 */
.pane-intro {
    text-align: center;
    margin-bottom: 3.5rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid var(--color-gray-200);
    position: relative;
}

.pane-intro::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-secondary);
    border-radius: 2px;
}

/* 英文小标签（次要） */
.pane-intro h3 {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-light);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
}

/* 中文大标题（主要） */
.pane-intro .pane-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    letter-spacing: -0.01em;
}

/* 描述文字 */
.pane-intro p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* 响应式 Tab */
@media (max-width: 1024px) {
    .carousel-nav.prev {
        left: 0;
    }
    
    .carousel-nav.next {
        right: 0;
    }
}

@media (max-width: 768px) {
    .hub-pane {
        padding: 0 50px;
    }
    
    .hub-tabs {
        gap: 0.5rem;
    }
    
    .hub-tab-btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.875rem;
    }
    
    .hub-tab-btn span {
        display: none;
    }
    
    .hub-tab-btn i {
        font-size: 1.25rem;
    }
    
    .pane-intro h3 {
        font-size: 0.75rem;
    }
    
    .pane-intro .pane-title {
        font-size: 1.75rem;
    }
    
    .pane-intro p {
        font-size: 0.9375rem;
    }
    
    .carousel-nav {
        width: 40px;
        height: 40px;
    }
    
    .carousel-nav i {
        font-size: 1rem;
    }
    
    .carousel-nav.prev {
        left: 5px;
    }
    
    .carousel-nav.next {
        right: 5px;
    }
}

/* ================================
   无界流体布局 (Horizontal Flow)
   ================================ */

.service-category {
    margin-bottom: 5rem;
    position: relative;
}

/* 容器两侧的渐变遮罩，提示可滚动 */
.service-category::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100px;
    height: 100%;
    background: linear-gradient(to right, transparent, white);
    pointer-events: none;
    z-index: 2;
}

.hub-pane {
    position: relative;
    padding: 0 60px;
}

/* 左右导航箭头 */
.carousel-nav {
    position: absolute;
    top: 55%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    background: white;
    border: 1px solid var(--color-gray-300);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
    opacity: 0.7;
    color: var(--text-secondary);
}

.carousel-nav:active {
    transform: translateY(-50%) scale(0.95);
}

.carousel-nav:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-50%) scale(1.05);
    box-shadow: var(--shadow-lg);
    opacity: 1;
}

.carousel-nav.prev {
    left: -25px;
}

.carousel-nav.next {
    right: -25px;
}

.carousel-nav i {
    font-size: 1.25rem;
}

/* 进度指示器 */
.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
}

.indicator-dot {
    width: 8px;
    height: 8px;
    background: var(--color-gray-300);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator-dot:hover {
    background: var(--color-gray-400);
    transform: scale(1.2);
}

.indicator-dot.active {
    width: 24px;
    border-radius: 4px;
    background: var(--primary-color);
}

.service-grid {
    display: flex;
    gap: 1.5rem;
    overflow-x: auto;
    overflow-y: hidden;
    padding: 1rem 0.5rem 2.5rem 0.5rem;
    scroll-behavior: smooth;
    scroll-snap-type: x proximity; 
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    cursor: grab;
    position: relative;
}

.service-grid::-webkit-scrollbar {
    display: none;
}

/* 拖拽时的样式 */
.service-grid.active {
    cursor: grabbing;
    cursor: -webkit-grabbing;
    scroll-snap-type: none;
    scroll-behavior: auto;
}

/* 隐藏Chrome/Safari滚动条 */
.service-grid::-webkit-scrollbar {
    display: none;
}

.service-card {
    flex: 0 0 360px; /* 加大卡片宽度 */
    height: auto;
    background: white;
    padding: 3rem 2.5rem;
    border-radius: var(--radius-xl);
    border: 1px solid rgba(0, 0, 0, 0.04);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    scroll-snap-align: start;
    position: relative;
    overflow: hidden;
}

/* 高级悬停效果 */
.service-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: transparent;
}

/* 卡片顶部的彩色装饰条 */
.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-secondary);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.service-card:hover::before {
    opacity: 1;
}

.service-card .card-icon-wrapper {
    width: 72px;
    height: 72px;
    background: var(--color-gray-50);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    color: var(--text-secondary);
    margin-bottom: 1.75rem;
    transition: all 0.4s ease;
}

.service-card:hover .card-icon-wrapper {
    background: var(--primary-color);
    color: white;
    transform: scale(1.05);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.service-card h4 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 0.875rem;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.service-card:hover h4 {
    color: var(--primary-color);
}

.service-card p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.service-card .card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-size: 0.9375rem;
    font-weight: 600;
    text-decoration: none;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.4s ease;
}

.service-card:hover .card-link {
    opacity: 1;
    transform: translateY(0);
}

.service-card .card-link i {
    font-size: 0.875rem;
    transition: transform 0.3s ease;
}

.service-card .card-link:hover i {
    transform: translateX(5px);
}

/* "了解更多" 箭头链接，增加高级感 */
.service-card::after {
    content: '了解更多 →';
    margin-top: auto; /* 推到底部 */
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
}

.service-card:hover::after {
    opacity: 1;
    transform: translateX(0);
}

/* 响应式调整 */
@media (max-width: 640px) {
    .service-card {
        flex: 0 0 280px; /* 手机上稍微窄一点 */
    }
    
    .service-category::after {
        width: 50px; /* 手机上遮罩窄一点 */
    }
}

.card-icon-wrapper {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-gray-100);
    border-radius: var(--radius-md);
    color: var(--primary-color);
    font-size: 1.25rem;
    margin-bottom: 1rem;
    transition: all var(--transition-base);
}


.service-card h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.625rem;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* ================================
   优势特点
   ================================ */

.features {
    background: var(--color-gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    text-align: left;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-200);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--gradient-secondary);
    transition: height var(--transition-base);
}

.feature-card:hover::before {
    height: 100%;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.15);
    border-color: transparent;
}

.feature-card:hover .feature-icon-wrapper {
    transform: scale(1.1);
    box-shadow: 0 10px 20px -5px rgba(102, 126, 234, 0.4);
}

.feature-icon-wrapper {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-secondary);
    border-radius: var(--radius-lg);
    color: white;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    transition: all var(--transition-base);
}

.feature-card h3 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* ================================
   关于我们
   ================================ */

.about {
    background: var(--color-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.about-text h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.about-text p {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-cta {
    margin-top: 2.5rem;
}

.btn-about {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2.25rem;
    background: var(--gradient-secondary);
    color: white;
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.btn-about:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.about-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-img {
    width: 100%;
    height: 480px;
    object-fit: cover;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
}

.image-overlay {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
}

.overlay-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    animation: float 3s ease-in-out infinite;
}

.overlay-badge i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

.overlay-badge span {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9375rem;
}

/* ================================
   联系我们
   ================================ */

.contact {
    background: var(--color-gray-50);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    gap: 1.25rem;
    align-items: flex-start;
    padding: 1.75rem;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xs);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.contact-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.contact-icon-wrapper {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border-radius: var(--radius-md);
    color: var(--primary-color);
    font-size: 1.5rem;
}

.contact-text h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.375rem;
    color: var(--text-primary);
}

.contact-text p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.contact-form-wrapper {
    background: white;
    padding: 3rem;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-gray-200);
}

.contact-form-wrapper h3 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--text-primary);
    background: white;
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    width: 100%;
    padding: 1rem 2rem;
    background: var(--gradient-secondary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* ================================
   页脚
   ================================ */

.footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand .footer-logo {
    margin-bottom: 1.25rem;
}

.footer-brand .footer-logo h3 {
    font-size: 1.75rem;
    font-weight: 800;
    color: white;
    margin-bottom: 0.25rem;
    letter-spacing: -0.02em;
}

.footer-brand .footer-logo span {
    font-size: 0.875rem;
    color: var(--color-gray-400);
    letter-spacing: 0.05em;
}

.footer-desc {
    color: var(--color-gray-400);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.footer-contact {
    color: var(--color-gray-300);
    font-weight: 600;
}

.footer-section h4,
.footer-col h4 {
    font-size: 1rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1.25rem;
}

.footer-col h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: 0.75rem;
}

.footer-col p {
    color: var(--color-gray-400);
    font-size: 0.9375rem;
    line-height: 1.7;
    margin-bottom: 1rem;
}

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

.footer-section ul li,
.footer-col ul li {
    margin-bottom: 0.75rem;
}

.footer-section ul li a,
.footer-col ul li a {
    color: var(--color-gray-400);
    text-decoration: none;
    transition: color var(--transition-base);
    font-size: 0.9375rem;
}

.footer-section ul li a:hover,
.footer-col ul li a:hover {
    color: white;
}

.footer-col ul li i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

.footer-divider {
    height: 1px;
    background: var(--color-gray-700);
    margin-bottom: 2rem;
}

.footer-bottom {
    text-align: center;
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

/* ================================
   滚动进度条
   ================================ */

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-secondary);
    z-index: 10000;
    transition: width 0.1s ease;
}

/* ================================
   返回顶部按钮
   ================================ */

.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient-secondary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.back-to-top:active {
    transform: translateY(-1px);
}

/* ================================
   响应式设计
   ================================ */

@media (max-width: 1024px) {
    .stats-wrapper {
        grid-template-columns: repeat(4, auto);
        justify-content: space-between;
    }
    
    .stat-divider:nth-child(6) {
        display: none;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .about-img {
        height: 320px;
    }
    
    .overlay-badge {
        padding: 0.75rem 1rem;
        bottom: 1rem;
        right: 1rem;
    }
    
    .overlay-badge span {
        font-size: 0.875rem;
    }
    
    .overlay-badge i {
        font-size: 1rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 1024px) {
    .hero-layout {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-visual {
        height: 400px;
    }
    
    .visual-stats {
        gap: 1rem;
    }
    
    .stat-item-hero {
        padding: 0.75rem 1rem;
    }
    
    .stat-number-hero {
        font-size: 1.5rem;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    /* 
     * 移除旧的导航菜单样式，统一使用底部的 MateCloud 风格配置
     */
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 2.75rem;
    }
    
    .brand-logo {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1.125rem;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-hero {
        width: 100%;
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .hero-scroll {
        bottom: 1.5rem;
    }
    
    .scroll-text {
        display: none;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .stats-wrapper {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .stat-divider {
        display: none;
    }
    
    .services-nav {
        top: 75px;
        padding: 1rem 0;
    }
    
    .services-nav-wrapper {
        gap: 0.5rem;
    }
    
    .service-nav-item {
        padding: 0.625rem 1rem;
        font-size: 0.875rem;
    }
    
    .service-nav-item i {
        font-size: 1rem;
    }
    
    .service-nav-item span {
        display: none;
    }
    
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .cta-content h2 {
        font-size: 1.75rem;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .cta-actions .btn-primary,
    .cta-actions .btn-secondary {
        width: 100%;
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .back-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 45px;
        height: 45px;
        font-size: 1.125rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1.25rem;
    }
    
    .loader-text {
        font-size: 2rem;
    }
    
    .loader-bar {
        width: 200px;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .brand-logo {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-badge {
        font-size: 0.75rem;
        padding: 0.5rem 1rem;
    }
    
    .hero-features {
        gap: 0.75rem;
    }
    
    .feature-item {
        font-size: 0.875rem;
    }
    
    .partners-logos {
        gap: 0.5rem;
    }
    
    .partner-item {
        font-size: 0.75rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-hero {
        width: 100%;
        justify-content: center;
        padding: 0.875rem 1.5rem;
    }
    
    .service-header h3 {
        font-size: 1.5rem;
    }
    
    .stats-wrapper {
        grid-template-columns: 1fr;
    }
    
    .service-nav-item {
        padding: 0.5rem 0.75rem;
    }
    
    .partners-grid,
    .service-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 2rem 1.5rem;
    }
    
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
}

/* ================================
   通知系统（Toast）
   ================================ */

.notification-container {
    position: fixed;
    top: 100px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    pointer-events: none;
}

.notification {
    background: white;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 320px;
    max-width: 480px;
    transform: translateX(400px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    pointer-events: all;
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
}

.notification-success {
    border-left: 4px solid #10b981;
}

.notification-error {
    border-left: 4px solid #ef4444;
}

.notification-warning {
    border-left: 4px solid #f59e0b;
}

.notification-info {
    border-left: 4px solid #3b82f6;
}

.notification i:first-child {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.notification-success i:first-child {
    color: #10b981;
}

.notification-error i:first-child {
    color: #ef4444;
}

.notification-warning i:first-child {
    color: #f59e0b;
}

.notification-info i:first-child {
    color: #3b82f6;
}

.notification span {
    flex: 1;
    color: var(--text-primary);
    font-size: 0.9375rem;
    line-height: 1.5;
}

.notification-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.notification-close:hover {
    background: var(--color-gray-100);
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .notification-container {
        right: 10px;
        left: 10px;
        top: 80px;
    }
    
    .notification {
        min-width: auto;
        width: 100%;
    }
}

/* ================================
   无障碍优化
   ================================ */

/* 键盘导航时显示焦点 */
body:not(.user-is-tabbing) *:focus {
    outline: none;
}

body.user-is-tabbing *:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 跳过导航链接（屏幕阅读器） */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 10000;
}

.skip-to-content:focus {
    top: 0;
}

/* 减少动画（尊重用户偏好） */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ================================
   特殊视觉效果
   ================================ */

/* 鼠标悬停时的波纹效果 */
.btn-primary,
.btn-hero,
.btn-submit,
.btn-about {
    position: relative;
    overflow: hidden;
}

.btn-primary::after,
.btn-hero::after,
.btn-submit::after,
.btn-about::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn-primary:hover::after,
.btn-hero:hover::after,
.btn-submit:hover::after,
.btn-about:hover::after {
    width: 300px;
    height: 300px;
}

/* 选中文本颜色 */
::selection {
    background: rgba(102, 126, 234, 0.2);
    color: var(--text-primary);
}

::-moz-selection {
    background: rgba(102, 126, 234, 0.2);
    color: var(--text-primary);
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-secondary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gradient-primary);
}

/* 聚焦时的外轮廓 */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* 图片懒加载效果 */
img {
    transition: opacity 0.3s ease;
}

img[loading="lazy"] {
    opacity: 0;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* ==========================================================================
   移动端重构 (Mobile Refactoring)
   ========================================================================== */

@media (max-width: 1024px) {
    .hero-layout {
        grid-template-columns: 1fr;
        gap: 3rem;
        text-align: center;
    }
    
    .hero-content {
        align-items: center;
        margin: 0 auto;
        max-width: 600px;
    }
    
    .hero-subtitle {
        margin: 0 auto 2rem;
    }
    
    .hero-features {
        justify-content: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-partners {
        justify-content: center;
    }

    .hero-visual {
        display: none !important; /* 强制隐藏复杂的视觉图 */
    }

    .stats-wrapper {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
        justify-items: center;
    }
    
    .stat-divider {
        display: none;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .about-img {
        height: 360px;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {
    /* --- 全局容器与排版 --- */
    .container {
        padding: 0 1.25rem; /* 左右留白更舒适 */
    }
    
    .section-header {
        margin-bottom: 1.75rem !important;
        text-align: left !important; /* 移动端左对齐 */
        padding: 0 0.5rem !important;
    }
    
    .section-header .section-tag {
        font-size: 0.6875rem !important;
        padding: 0.3rem 0.75rem !important;
        margin-bottom: 0.625rem !important;
    }
    
    .section-header h2 {
        font-size: 1.5rem !important;
        margin-bottom: 0.5rem !important;
        line-height: 1.3 !important;
    }
    
    .section-header p {
        font-size: 0.875rem !important;
        line-height: 1.5 !important;
        opacity: 0.8 !important;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
        line-height: 1.3;
    }
    
    .section-header p {
        font-size: 1rem;
        text-align: left;
        margin: 0;
    }

    /* --- 导航栏 (Navbar) --- */
    .navbar {
        height: 64px;
        padding: 0;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
    }
    
    .nav-container {
        height: 100%;
        padding: 0 1.25rem;
    }
    
    .hamburger {
        display: flex;
        width: 40px;
        height: 40px;
        justify-content: center;
        align-items: center;
        border-radius: 50%; /* 圆形触摸区域 */
        background: transparent;
    }
    
    .hamburger:active {
        background: var(--color-gray-100);
    }
    
    /* 
     * 移除旧的导航菜单样式 (v2)
     */
    
    .btn-nav {
        width: 100%;
        margin-top: 2rem;
        justify-content: center;
        padding: 1rem;
        font-size: 1rem;
    }
    
    /* 下拉菜单重构 */
    /* 
     * 移除旧的下拉菜单样式 (v2)
     */

    /* --- HERO 区域极致优化 --- */
    .hero {
        padding: 90px 0 40px; /* 减小顶部内边距 */
        text-align: left;
    }
    
@media (max-width: 768px) {
    /* =================================
       移动端优化 - 精致美化版
       ================================= */
    
    /* --- 通用容器 --- */
    .container {
        padding: 0 1.25rem !important;
    }
    
    /* --- 导航栏优化 --- */
    .navbar {
        background: white !important;
        border-bottom: 1px solid rgba(226, 232, 240, 0.6) !important;
        backdrop-filter: blur(10px) !important;
    }
    
    .logo-subtitle {
        display: none !important;
    }
    
    .logo h1 {
        font-size: 1.25rem !important;
        margin: 0 !important;
        font-weight: 700 !important;
        color: #1a202c !important;
        letter-spacing: -0.02em !important;
    }
    
    /* 汉堡菜单按钮优化 */
    .hamburger {
        width: 28px !important;
        height: 28px !important;
        padding: 0 !important;
    }
    
    .hamburger span {
        width: 100% !important;
        height: 2px !important;
        background: #1a202c !important;
        border-radius: 2px !important;
        transition: all 0.3s ease !important;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg) !important;
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0 !important;
    }
    
    .hamburger.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg) !important;
    }
    
    /* 菜单容器 - MateCloud 风格 */
    .nav-menu {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        width: 100% !important;
        height: 100vh !important;
        background: #ffffff !important;
        flex-direction: column !important;
        align-items: stretch !important;
        padding: 5rem 2rem 2.5rem !important;
        gap: 0 !important;
        transform: translateX(100%) !important;
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1) !important;
        overflow-y: auto !important;
        box-shadow: -2px 0 24px rgba(0, 0, 0, 0.06) !important;
        z-index: 999 !important;
    }
    
    .nav-menu.active {
        transform: translateX(0) !important;
    }
    
    /* 菜单滚动条优化 */
    .nav-menu::-webkit-scrollbar {
        width: 4px !important;
    }
    
    .nav-menu::-webkit-scrollbar-track {
        background: transparent !important;
    }
    
    .nav-menu::-webkit-scrollbar-thumb {
        background: rgba(160, 174, 192, 0.3) !important;
        border-radius: 10px !important;
    }
    
    .nav-menu::-webkit-scrollbar-thumb:hover {
        background: rgba(160, 174, 192, 0.5) !important;
    }
    
    /* 菜单分隔线（位于按钮上方） */
    .nav-menu .btn-nav::before,
    .nav-menu .btn-primary::before {
        content: none !important;
    }
    
    .nav-menu > :last-child {
        border-top: 1px solid rgba(226, 232, 240, 0.6) !important;
        padding-top: 1.5rem !important;
        margin-top: auto !important;
    }
    
    /* 菜单项 - 极简风格 */
    .nav-item {
        width: 100% !important;
        margin-bottom: 0 !important;
    }
    
    .nav-link {
        display: flex !important;
        align-items: center !important;
        padding: 1.125rem 0.5rem !important;
        font-size: 1rem !important;
        color: #1a202c !important;
        font-weight: 400 !important;
        transition: all 0.2s ease !important;
        border-radius: 0 !important;
        background: transparent !important;
        border: none !important;
        position: relative !important;
        letter-spacing: 0 !important;
    }
    
    /* 移除装饰 */
    .nav-link::before {
        display: none !important;
    }
    
    .nav-link:active {
        background: rgba(102, 126, 234, 0.04) !important;
    }
    
    /* Active 状态 */
    .nav-link.active {
        color: #667eea !important;
        font-weight: 500 !important;
    }
    
    /* 下拉菜单 - MateCloud 风格 */
    .nav-menu .dropdown-menu {
        background: transparent !important;
        border-radius: 0 !important;
        padding: 0 !important;
        margin: 0 !important;
        border: none !important;
        box-shadow: none !important;
        
        /* 必须重置PC端的隐藏状态 */
        position: static !important;
        opacity: 1 !important;
        visibility: visible !important;
        transform: none !important;
        display: none !important; /* 默认隐藏 */
        transition: none !important;
    }
    
    /* 展开状态 */
    .nav-menu .dropdown.active .dropdown-menu {
        display: block !important;
        padding-bottom: 0.75rem !important;
    }
    
    .nav-menu .dropdown-menu li {
        margin-bottom: 0 !important;
    }
    
    .nav-menu .dropdown-menu li a {
        padding: 0.875rem 0.5rem 0.875rem 2.5rem !important;
        font-size: 0.9375rem !important;
        color: #718096 !important;
        display: flex !important;
        align-items: center !important;
        border-bottom: none !important;
        border-radius: 0 !important;
        background: transparent !important;
        transition: color 0.2s ease !important;
        font-weight: 400 !important;
        position: relative !important;
        letter-spacing: 0 !important;
    }
    
    /* 移除装饰 */
    .nav-menu .dropdown-menu li a::before {
        display: none !important;
    }
    
    .nav-menu .dropdown-menu li a:active {
        background: rgba(102, 126, 234, 0.03) !important;
        color: #667eea !important;
    }
    
    /* 下拉箭头 - 简约 */
    .nav-link i.fa-chevron-down {
        margin-left: auto !important;
        transition: transform 0.25s ease !important;
        color: #a0aec0 !important;
        font-size: 0.6875rem !important;
    }
    
    .nav-menu .dropdown.active > a i.fa-chevron-down {
        transform: rotate(180deg) !important;
    }
    
    /* 免费咨询按钮 - 简洁 */
    .nav-menu .btn-nav,
    .nav-menu .btn-primary {
        width: 100% !important;
        margin-top: auto !important;
        padding: 1rem 1.5rem !important;
        font-size: 1rem !important;
        border-radius: 10px !important;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
        box-shadow: 0 3px 12px rgba(102, 126, 234, 0.25) !important;
        justify-content: center !important;
        display: flex !important;
        align-items: center !important;
        gap: 0.5rem !important;
        font-weight: 600 !important;
        letter-spacing: 0 !important;
        border: none !important;
        transition: all 0.2s ease !important;
    }
    
    /* 移除按钮装饰 */
    .nav-menu .btn-nav::after,
    .nav-menu .btn-primary::after {
        display: none !important;
    }
    
    .nav-menu .btn-nav:active,
    .nav-menu .btn-primary:active {
        transform: translateY(2px) !important;
        box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2) !important;
    }
    
    /* --- Hero 区域整体 - 占满一屏 --- */
    .hero {
        min-height: 100vh !important;
        height: 100vh !important;
        padding: 0 !important;
        display: flex !important;
        align-items: center !important;
    }
    
    .hero .container {
        width: 100% !important;
    }
    
    .hero-layout {
        padding: 0 !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
        min-height: calc(100vh - 64px) !important; /* 减去导航栏高度 */
    }
    
    .hero-content {
        max-width: 100% !important;
        margin: 0 !important;
        padding: 2rem 0 !important;
    }
    
    .hero-brand {
        display: none !important;
    }
    
    /* --- 徽章 - 精致化 --- */
    .hero-badge {
        display: inline-flex !important;
        align-items: center !important;
        margin-bottom: 1.25rem !important;
        padding: 0.45rem 1rem !important;
        font-size: 0.6875rem !important;
        background: linear-gradient(135deg, rgba(102, 126, 234, 0.08), rgba(118, 75, 162, 0.06)) !important;
        border: 1px solid rgba(102, 126, 234, 0.2) !important;
        border-radius: 100px !important;
        box-shadow: 0 2px 8px rgba(102, 126, 234, 0.08) !important;
        font-weight: 600 !important;
        letter-spacing: 0.02em !important;
    }
    
    .hero-badge i {
        margin-right: 0.375rem !important;
        font-size: 0.75rem !important;
    }
    
    /* --- 标题 - 轻盈化 --- */
    .hero-title {
        font-size: 2rem !important;
        line-height: 1.15 !important;
        margin-bottom: 1rem !important;
        letter-spacing: -0.03em !important;
        font-weight: 700 !important; /* 不要太粗 */
        color: #1a202c !important;
    }
    
    /* --- 副标题 - 增强可读性 --- */
    .hero-subtitle {
        font-size: 0.9375rem !important;
        line-height: 1.65 !important;
        margin-bottom: 1.5rem !important;
        color: #4a5568 !important; /* 加深颜色 */
        font-weight: 400 !important;
    }
    
    /* --- 特性标签 - 极致精简 --- */
    .hero-features {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: wrap !important;
        gap: 0.5rem !important;
        width: 100% !important;
        justify-content: flex-start !important;
        margin-bottom: 1.75rem !important;
    }
    
    .feature-item {
        width: auto !important;
        flex: 0 0 auto !important;
        display: inline-flex !important;
        align-items: center !important; /* 确保图标和文字垂直居中 */
        padding: 0.4rem 0.75rem !important;
        margin: 0 !important;
        font-size: 0.75rem !important;
        border-radius: 100px !important;
        background: white !important;
        border: 1px solid #e2e8f0 !important;
        color: #667eea !important;
        font-weight: 600 !important;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05) !important;
        transition: all 0.2s ease !important;
    }
    
    .feature-item i {
        margin-right: 0.35rem !important;
        font-size: 0.75rem !important;
    }
    
    /* ========================================
       全局按钮样式统一 - 移动端
       ======================================== */
    
    /* 主按钮统一样式 */
    .btn-primary,
    .btn-hero.btn-primary,
    .hero-buttons a:first-child,
    .cta-section .btn-primary,
    .contact-form .btn-primary,
    button[type="submit"],
    .btn-about {
        background: #1a56db !important; /* 标准品牌蓝 */
        color: white !important;
        border: none !important;
        border-radius: 12px !important;
        font-weight: 600 !important;
        padding: 1rem 1.5rem !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 0.5rem !important;
        font-size: 0.9375rem !important;
        box-shadow: 0 4px 16px rgba(26, 86, 219, 0.3) !important;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
        text-decoration: none !important;
        cursor: pointer !important;
    }
    
    .btn-primary:active,
    .btn-hero.btn-primary:active,
    button[type="submit"]:active {
        background: #1e3a8a !important; /* 深蓝色点击态 */
        transform: translateY(2px) scale(0.98) !important;
        box-shadow: 0 2px 8px rgba(26, 86, 219, 0.25) !important;
    }
    
    /* 次按钮统一样式 */
    .btn-secondary,
    .btn-hero.btn-secondary,
    .hero-buttons a:last-child,
    .cta-section .btn-secondary {
        background: white !important;
        color: #1a56db !important; /* 品牌蓝文字 */
        border: 2px solid #1a56db !important; /* 品牌蓝边框 */
        border-radius: 12px !important;
        font-weight: 600 !important;
        padding: 1rem 1.5rem !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 0.5rem !important;
        font-size: 0.9375rem !important;
        box-shadow: 0 2px 10px rgba(26, 86, 219, 0.15) !important;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
        text-decoration: none !important;
        cursor: pointer !important;
    }
    
    .btn-secondary:active,
    .btn-hero.btn-secondary:active {
        transform: translateY(2px) scale(0.98) !important;
        background: rgba(26, 86, 219, 0.05) !important;
        box-shadow: 0 1px 4px rgba(26, 86, 219, 0.2) !important;
    }
    
    /* Hero 区域按钮组 */
    .hero-buttons {
        display: flex !important;
        flex-direction: row !important;
        gap: 0.75rem !important;
        margin-bottom: 2.5rem !important;
    }
    
    .btn-hero,
    .hero-buttons a {
        flex: 1 !important;
        height: 50px !important;
        min-height: 50px !important;
    }
    
    /* 按钮图标 */
    .btn i,
    .btn-hero i,
    .btn-primary i,
    .btn-secondary i {
        font-size: 0.9375rem !important;
        line-height: 1 !important;
        flex-shrink: 0 !important;
    }
    
    .btn span,
    .btn-hero span {
        line-height: 1 !important;
        display: inline-block !important;
    }
    
    /* 大尺寸按钮 */
    .btn-lg {
        padding: 1.125rem 2rem !important;
        font-size: 1.0625rem !important;
        height: 54px !important;
    }
    
    /* 卡片内按钮 */
    .card-link,
    .service-card .card-link {
        padding: 0.625rem 0 !important;
        font-size: 0.875rem !important;
        font-weight: 600 !important;
        color: #1a56db !important; /* 品牌蓝链接 */
        background: none !important;
        border: none !important;
        box-shadow: none !important;
        display: inline-flex !important;
        align-items: center !important;
        gap: 0.375rem !important;
    }
    
    /* 页面操作按钮组 */
    .page-actions {
        flex-direction: column !important;
        gap: 0.875rem !important;
    }
    
    .page-actions .btn-primary,
    .page-actions .btn-secondary {
        width: 100% !important;
        justify-content: center !important;
    }
    
    /* CTA区域按钮 - 特殊处理保持白色 */
    .cta-section .btn-primary {
        background: white !important;
        color: #667eea !important;
        box-shadow: 0 4px 20px rgba(255, 255, 255, 0.3) !important;
    }
    
    .cta-section .btn-primary:active {
        background: rgba(255, 255, 255, 0.95) !important;
        transform: translateY(2px) scale(0.98) !important;
    }
    
    .cta-section .btn-secondary {
        background: transparent !important;
        color: white !important;
        border: 2px solid white !important;
        box-shadow: none !important;
    }
    
    .cta-section .btn-secondary:active {
        background: rgba(255, 255, 255, 0.1) !important;
    }
    
    /* 定价卡片按钮 */
    .pricing-card .btn,
    .pricing-card .btn-primary,
    .pricing-card .btn-secondary {
        width: 100% !important;
        margin-top: auto !important;
    }
    
    /* --- 移动端隐藏合作伙伴，精简Hero区域 --- */
    .hero-partners {
        display: none !important;
    }
    
    /* --- 向下滚动提示 - 移动端专属设计 --- */
    .hero-scroll {
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        gap: 0.5rem !important;
        position: absolute !important;
        bottom: 2rem !important;
        left: 50% !important;
        transform: translateX(-50%) !important;
        animation: scrollBounce 2s ease-in-out infinite !important;
    }
    
    .scroll-text {
        display: block !important;
        font-size: 0.75rem !important;
        color: var(--text-secondary) !important;
        font-weight: 500 !important;
        opacity: 0.8 !important;
    }
    
    .scroll-indicator {
        display: flex !important;
        justify-content: center !important;
    }
    
    .scroll-mouse {
        width: 24px !important;
        height: 36px !important;
        border: 2px solid rgba(102, 126, 234, 0.3) !important;
        border-radius: 12px !important;
        display: flex !important;
        justify-content: center !important;
        padding-top: 6px !important;
    }
    
    .scroll-wheel {
        width: 3px !important;
        height: 8px !important;
        background: #667eea !important;
        border-radius: 2px !important;
        animation: scrollWheel 1.5s ease-in-out infinite !important;
    }
    
    @keyframes scrollBounce {
        0%, 100% {
            transform: translateX(-50%) translateY(0);
        }
        50% {
            transform: translateX(-50%) translateY(-8px);
        }
    }
    
    @keyframes scrollWheel {
        0% {
            opacity: 1;
            transform: translateY(0);
        }
        100% {
            opacity: 0;
            transform: translateY(12px);
        }
    }
}
    
    .hero-badge {
        margin-bottom: 1rem;
        padding: 0.35rem 0.75rem;
        font-size: 0.75rem;
    }
    
    .hero-title {
        font-size: 2.25rem;
        line-height: 1.1;
        margin-bottom: 1rem;
        letter-spacing: -0.02em;
    }
    
    .hero-subtitle {
        font-size: 0.9375rem;
        line-height: 1.6;
        margin-bottom: 1.5rem;
        color: var(--text-secondary);
        opacity: 0.9;
    }
    
    /* 特性列表 - 真正的小标签样式 */
    .hero-features {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem; /* 减小间距 */
        width: 100%;
        justify-content: flex-start;
        margin-bottom: 2rem;
    }
    
    .feature-item {
        width: fit-content; /* 强制自适应宽度 */
        flex: 0 0 auto;     /* 禁止伸缩 */
        font-size: 0.75rem;
        padding: 0.35rem 0.75rem;
        background: rgba(102, 126, 234, 0.05);
        border: 1px solid rgba(102, 126, 234, 0.15);
        border-radius: 100px;
        color: var(--primary-color);
        font-weight: 600;
        display: inline-flex;
        align-items: center;
        margin: 0;
    }
    
    .feature-item i {
        font-size: 0.75rem;
        margin-right: 0.35rem;
    }
    
    /* 按钮组 - 更精致的尺寸 */
    .hero-buttons {
        flex-direction: row;
        width: 100%;
        gap: 0.75rem;
    }
    
    .btn-hero {
        flex: 1;
        height: 44px; /* 减小高度 */
        font-size: 0.9375rem;
        padding: 0 0.5rem;
        border-radius: var(--radius-lg);
    }
    
    /* 合作伙伴区域调整 */
    .hero-partners {
        margin-top: 2.5rem;
        padding-top: 1.5rem;
        border-top: 1px solid rgba(0,0,0,0.05);
        gap: 0.75rem;
    }
    
    .partners-label {
        font-size: 0.75rem;
        color: var(--text-light);
        margin-bottom: 0.5rem;
        display: block;
    }
    
    .partners-logos {
        display: flex;
        flex-wrap: wrap;
        gap: 0.75rem 1.25rem;
    }
    
    .partner-item {
        font-size: 0.875rem;
        font-weight: 600;
        color: var(--text-secondary);
        opacity: 0.7;
    }
    
    /* --- 核心优势 Banner --- */
    .advantages-banner {
        padding: 3rem 0;
        background: var(--color-gray-50); /* 区分背景色 */
    }
    
    .advantages-grid-banner {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .advantage-item {
        padding: 1.25rem;
        flex-direction: row;
        align-items: center;
        text-align: left;
        background: white;
        box-shadow: var(--shadow-sm);
    }
    
    .advantage-icon-wrapper {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
        flex-shrink: 0;
    }
    
    .advantage-content h3 {
        font-size: 1rem;
        margin-bottom: 0.25rem;
    }
    
    .advantage-content p {
        font-size: 0.8125rem;
        margin: 0;
    }
    
    /* --- 服务聚合中心 - 紧凑设计 --- */
    .services-hub {
        padding: 2.5rem 0 2.5rem !important;
    }
    
    /* Tab需要横向滑动 - 减少间距 */
    .hub-tabs {
        display: flex !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        padding-bottom: 0.75rem !important;
        margin: 0 -1rem 1.25rem !important; /* 减小margin */
        padding-left: 1rem !important;
        padding-right: 1rem !important;
        gap: 0.75rem;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        justify-content: flex-start; /* 左对齐 */
    }
    
    .hub-tabs::-webkit-scrollbar {
        display: none;
    }
    
    .hub-tab-btn {
        flex-shrink: 0 !important;
        white-space: nowrap !important;
        padding: 0 1.125rem !important;
        font-size: 0.875rem !important;
        border-radius: 100px !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 0.5rem !important;
        height: 44px !important;
        min-width: auto !important;
        box-sizing: border-box !important;
        border: 1.5px solid transparent !important;
        background: white !important;
        color: #4a5568 !important;
        font-weight: 600 !important;
        transition: all 0.25s ease !important;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06) !important;
    }
    
    /* 激活状态 */
    .hub-tab-btn.active {
        background: #1a56db !important; /* 品牌蓝 */
        color: white !important;
        border-color: transparent !important;
        box-shadow: 0 3px 10px rgba(26, 86, 219, 0.25) !important;
        transform: none !important;
    }
    
    /* 触摸反馈 */
    .hub-tab-btn:active {
        transform: scale(0.96) !important;
        box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08) !important;
    }
    
    .hub-tab-btn i {
        font-size: 0.9375rem !important;
        line-height: 1 !important;
        flex-shrink: 0 !important;
        width: 0.9375rem !important;
        height: 0.9375rem !important;
        text-align: center !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
    }
    
    .hub-tab-btn span {
        line-height: 1 !important;
        display: inline-block !important;
        font-size: 0.875rem !important;
    }
    
    .hub-pane {
        padding: 0 !important;
    }
    
    /* 简化intro区域 */
    .pane-intro {
        text-align: left !important;
        margin-bottom: 1.25rem !important;
        padding: 0 0.5rem !important;
    }
    
    .pane-intro .intro-tag {
        font-size: 0.6875rem !important;
        padding: 0.25rem 0.625rem !important;
        margin-bottom: 0.5rem !important;
    }
    
    .pane-intro h3 {
        font-size: 1.375rem !important;
        margin-bottom: 0.5rem !important;
        line-height: 1.3 !important;
    }
    
    .pane-intro p {
        font-size: 0.8125rem !important;
        line-height: 1.5 !important;
        opacity: 0.75 !important;
    }
    
    /* 优化分页指示器 */
    .carousel-indicators {
        margin-top: 1.25rem !important;
        gap: 0.375rem !important;
    }
    
    .indicator-dot {
        width: 6px !important;
        height: 6px !important;
    }
    
    .pane-intro .pane-title {
        font-size: 1.5rem;
    }
    
    .pane-intro p {
        font-size: 0.9375rem;
        text-align: left;
    }
    
    /* 服务卡片横向滑动 - 紧凑设计 */
    .service-grid {
        display: flex !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        gap: 0.875rem !important;
        padding: 0.75rem 0.5rem 2rem 0.5rem !important;
        margin: 0 -0.75rem !important;
        padding-left: 0.75rem !important;
        padding-right: 0.75rem !important;
        scroll-snap-type: x mandatory !important;
        -webkit-overflow-scrolling: touch !important;
    }
    
    .service-card {
        min-width: 260px !important;
        max-width: 270px !important;
        flex: 0 0 78% !important;
        scroll-snap-align: center !important;
        margin: 0 !important;
        height: auto !important;
        padding: 1.5rem 1.25rem !important;
        border: 1px solid rgba(226, 232, 240, 0.8) !important;
        box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05) !important;
        border-radius: 16px !important;
        background: white !important;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    }
    
    /* 卡片触摸反馈 */
    .service-card:active {
        transform: scale(0.98) !important;
        box-shadow: 0 1px 6px rgba(0, 0, 0, 0.08) !important;
    }
    
    /* 卡片内容精致化 */
    .service-card .card-icon-wrapper {
        width: 48px !important;
        height: 48px !important;
        margin-bottom: 1rem !important;
        background: linear-gradient(135deg, rgba(102, 126, 234, 0.08), rgba(118, 75, 162, 0.06)) !important;
        border-radius: 12px !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        border: 1px solid rgba(102, 126, 234, 0.12) !important;
    }
    
    .service-card .card-icon-wrapper i {
        font-size: 1.375rem !important;
        color: var(--primary-color) !important;
    }
    
    .service-card h4 {
        font-size: 1.0625rem !important;
        margin-bottom: 0.625rem !important;
        line-height: 1.4 !important;
        font-weight: 700 !important;
        color: #1a202c !important;
        letter-spacing: -0.01em !important;
    }
    
    .service-card p {
        font-size: 0.8125rem !important;
        line-height: 1.6 !important;
        margin-bottom: 1rem !important;
        color: #4a5568 !important;
        opacity: 0.9 !important;
    }
    
    .service-card .card-link {
        font-size: 0.8125rem !important;
        padding: 0.625rem 0 0 !important;
        margin-top: auto !important;
        font-weight: 600 !important;
        color: var(--primary-color) !important;
        display: inline-flex !important;
        align-items: center !important;
        gap: 0.375rem !important;
        transition: gap 0.2s ease !important;
    }
    
    .service-card .card-link:hover {
        gap: 0.625rem !important;
    }
    
    .service-card .card-link i {
        font-size: 0.75rem !important;
        transition: transform 0.2s ease !important;
    }
    
    .service-card .card-link:hover i {
        transform: translateX(2px) !important;
    }
    
    /* 隐藏PC端箭头 */
    .carousel-nav {
        display: none !important;
    }
    
    /* --- Footer --- */
    .footer {
        padding: 3rem 0 2rem;
        text-align: left;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .footer-col h3 {
        font-size: 1.125rem;
        margin-bottom: 1rem;
        border-left: 3px solid var(--primary-color);
        padding-left: 0.75rem;
    }
    
    .footer-brand p {
        text-align: left;
    }
    
    .social-links {
        justify-content: flex-start;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .brand-logo {
        font-size: 1.75rem;
    }
    
    .stats-wrapper {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .stat-item {
        background: var(--color-gray-50);
        padding: 1rem;
        border-radius: var(--radius-lg);
        width: 100%;
    }
    
    /* 进一步优化卡片展示 */
    .service-card {
        flex: 0 0 90%; /* 手机上更宽一点 */
    }
}

/* 
 * =================================================================
 * 移动端菜单 - 独立重写 (强制生效版)
 * =================================================================
 */

@media (max-width: 768px) {
    /* 1. 菜单容器 - 全屏覆盖 */
    #nav-menu.nav-menu {
        position: fixed !important;
        top: 60px !important; /* 留出头部高度 */
        left: 0 !important;
        width: 100% !important;
        height: calc(100vh - 60px) !important;
        background: #ffffff !important;
        flex-direction: column !important;
        align-items: stretch !important;
        padding: 1.5rem 1.5rem 2rem !important;
        gap: 0 !important;
        transform: translateX(100%) !important;
        transition: transform 0.3s ease !important;
        box-shadow: none !important;
        overflow-y: auto !important;
        z-index: 999 !important;
        display: flex !important;
    }
    
    /* 激活状态 */
    #nav-menu.nav-menu.active {
        transform: translateX(0) !important;
    }
    
    /* 2. 菜单项 - 列表样式 */
    #nav-menu.nav-menu > li {
        width: 100% !important;
        border-bottom: 1px solid #f1f5f9 !important;
        margin: 0 !important;
        padding: 0 !important;
        display: block !important;
    }
    
    /* 链接样式 */
    #nav-menu.nav-menu > li > a {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        padding: 1.25rem 0 !important;
        font-size: 1.0625rem !important; /* 17px */
        color: #1e293b !important; /* 深色文字 */
        font-weight: 500 !important;
        text-decoration: none !important;
        width: 100% !important;
        background: transparent !important;
    }
    
    /* 3. 下拉菜单 - 内嵌展开 */
    #nav-menu.nav-menu .dropdown-menu {
        position: static !important;
        opacity: 1 !important;
        visibility: visible !important;
        transform: none !important;
        box-shadow: none !important;
        border: none !important;
        background: #f8fafc !important; /* 浅灰背景 */
        padding: 0 !important;
        margin: 0 !important;
        display: none !important; /* 默认隐藏 */
        border-radius: 8px !important;
        width: 100% !important;
    }
    
    /* 激活显示下拉 */
    #nav-menu.nav-menu .dropdown.active .dropdown-menu {
        display: block !important;
        margin-bottom: 1rem !important;
    }
    
    /* 下拉菜单项 */
    #nav-menu.nav-menu .dropdown-menu li {
        border-bottom: 1px solid rgba(0,0,0,0.03) !important;
        margin: 0 !important;
        padding: 0 !important;
        height: auto !important; /* 确保高度自适应 */
        min-height: 0 !important;
    }
    
    #nav-menu.nav-menu .dropdown-menu li:last-child {
        border-bottom: none !important;
        padding-bottom: 0 !important; /* 移除可能的底部内边距 */
        margin-bottom: 0 !important;
    }
    
    #nav-menu.nav-menu .dropdown-menu li a {
        padding: 0.875rem 1rem !important;
        font-size: 0.9375rem !important; /* 15px */
        color: #64748b !important; /* 次级文字颜色 */
        display: block !important;
        line-height: 1.5 !important;
    }
    
    /* 4. 箭头图标 */
    #nav-menu.nav-menu i.fa-chevron-down {
        font-size: 0.75rem !important;
        color: #94a3b8 !important;
        transition: transform 0.3s ease !important;
        margin-left: auto !important;
    }
    
    #nav-menu.nav-menu .dropdown.active > a i.fa-chevron-down {
        transform: rotate(180deg) !important;
        color: #667eea !important;
    }
    
    /* 5. 底部按钮位置控制 */
    /* 确保"联系我们"（主菜单倒数第二项，如果是 li）推到底部 */
    #nav-menu.nav-menu > li:last-of-type {
        border-bottom: none !important;
        margin-top: auto !important; 
        padding-top: 2rem !important;
    }
    
    /* 针对可能的按钮容器 */
    #nav-menu.nav-menu > .btn-primary {
        margin-top: 0 !important; /* 由上一个 li 推下来 */
    }
    
    /* 绝对修复：重置下拉菜单内所有 li 的样式 */
    #nav-menu.nav-menu .dropdown-menu li {
        margin-top: 0 !important;
        padding-top: 0 !important;
        border-bottom: 1px solid rgba(0,0,0,0.03) !important;
        height: auto !important;
    }

    #nav-menu.nav-menu .dropdown-menu li:last-child {
        border-bottom: none !important;
        padding-bottom: 0 !important;
        margin-bottom: 0 !important;
    }
    
    #nav-menu.nav-menu .btn-primary {
        width: 100% !important;
        display: flex !important;
        justify-content: center !important;
        align-items: center !important;
        padding: 1rem !important;
        background: #1a56db !important; /* 品牌蓝 */
        color: white !important;
        border-radius: 12px !important;
        font-weight: 600 !important;
        box-shadow: 0 4px 12px rgba(26, 86, 219, 0.3) !important;
        margin: 0 !important;
    }
}