/* ===========================
   全局变量与重置
   =========================== */
:root {
    /* 主色调 - 深蓝科技感 */
    --color-primary: #0A4D8C;
    --color-primary-light: #1976D2;
    --color-primary-dark: #063063;
    
    /* 辅助色 - 青色活力 */
    --color-accent: #00B4D8;
    --color-accent-light: #4DD0E1;
    --color-accent-dark: #00838F;
    
    /* 生态绿 */
    --color-green: #06A77D;
    --color-green-light: #4DD9A8;
    
    /* 紫色 */
    --color-purple: #6C2BD9;
    --color-purple-light: #9D5BE8;
    
    /* 中性色 */
    --color-bg: #FFFFFF;
    --color-bg-alt: #F7FAFC;
    --color-bg-dark: #0A1929;
    --color-surface: #FFFFFF;
    --color-border: #E2E8F0;
    
    /* 文字 */
    --color-text: #1A202C;
    --color-text-secondary: #4A5568;
    --color-text-light: #718096;
    --color-text-white: #FFFFFF;
    
    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --shadow-xl: 0 24px 60px rgba(0,0,0,0.15);
    --shadow-glow: 0 0 40px rgba(0, 180, 216, 0.3);
    
    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    
    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* 容器 */
    --container-max: 1200px;
    
    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', '微软雅黑', 'Noto Sans SC', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

img, svg {
    display: block;
    max-width: 100%;
}

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ===========================
   通用容器
   =========================== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
}

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

/* ===========================
   按钮系统
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    white-space: nowrap;
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    box-shadow: 0 4px 16px rgba(10, 77, 140, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(10, 77, 140, 0.4);
}

.btn-outline {
    background: transparent;
    color: white;
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.8);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* ===========================
   导航栏
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    padding: 12px 0;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: white;
    transition: var(--transition);
}

.navbar.scrolled .nav-logo {
    color: var(--color-primary);
}

.logo-icon {
    width: 36px;
    height: 36px;
    color: var(--color-accent);
}

.navbar.scrolled .logo-icon {
    color: var(--color-primary);
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.navbar.scrolled .logo-img {
    box-shadow: 0 2px 8px rgba(10, 77, 140, 0.15);
}

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

.nav-link {
    padding: 8px 16px;
    color: rgba(255, 255, 255, 0.85);
    font-size: 15px;
    font-weight: 400;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.navbar.scrolled .nav-link {
    color: var(--color-text-secondary);
}

.nav-link:hover {
    color: white;
    background: rgba(255, 255, 255, 0.1);
}

.navbar.scrolled .nav-link:hover {
    color: var(--color-primary);
    background: rgba(10, 77, 140, 0.08);
}

.nav-link.active {
    color: white;
    font-weight: 500;
}

.navbar.scrolled .nav-link.active {
    color: var(--color-primary);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-cta {
    padding: 10px 24px;
    font-size: 14px;
}

.navbar.scrolled .nav-cta {
    color: white;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

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

.navbar.scrolled .nav-toggle span {
    background: var(--color-text);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* ===========================
   Hero 首页
   =========================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #0A1929 0%, #063063 40%, #0A4D8C 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-image {
    position: absolute;
    inset: 0;
    background: url('../images/hero.webp') center/cover no-repeat;
    opacity: 0.18;
    animation: heroZoom 20s ease-in-out infinite alternate;
}

@keyframes heroZoom {
    0% { transform: scale(1); }
    100% { transform: scale(1.08); }
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(rgba(0, 180, 216, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 180, 216, 0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-accent) 0%, transparent 70%);
    top: -10%;
    right: -5%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--color-green) 0%, transparent 70%);
    bottom: -10%;
    left: -5%;
    animation-delay: -7s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, var(--color-purple) 0%, transparent 70%);
    top: 40%;
    left: 30%;
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-content {
    position: relative;
    z-index: 1;
    color: white;
    padding-top: 80px;
    padding-bottom: 60px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 100px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
    animation: fadeInUp 0.6s ease;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-green-light);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--color-green-light);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.text-gradient {
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-green-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.75);
    max-width: 680px;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hide-mobile {
    display: inline;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 64px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
}

.stat-suffix {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-accent);
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 8px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255, 255, 255, 0.15);
}

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

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.5);
    animation: fadeIn 1s ease 1s both;
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 14px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}

.wheel {
    width: 4px;
    height: 8px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 2px;
    animation: scroll 1.5s ease infinite;
}

@keyframes scroll {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(12px); }
}

.scroll-text {
    font-size: 12px;
    letter-spacing: 1px;
}

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

/* ===========================
   通用 Section Header
   =========================== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--color-accent);
    text-transform: uppercase;
    margin-bottom: 12px;
    padding: 4px 16px;
    background: rgba(0, 180, 216, 0.08);
    border-radius: 100px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
}

.section-desc {
    font-size: 17px;
    color: var(--color-text-light);
}

/* ===========================
   关于我们
   =========================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-heading {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 20px;
    line-height: 1.4;
}

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

.about-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 32px;
}

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

.feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.about-feature h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}

.about-feature p {
    font-size: 14px;
    color: var(--color-text-light);
}

.about-image-banner {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: var(--shadow-md);
    aspect-ratio: 16 / 9;
}

.about-image-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.about-image-banner:hover img {
    transform: scale(1.05);
}

.about-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(10, 77, 140, 0.85) 100%);
    display: flex;
    align-items: flex-end;
    padding: 20px;
}

.about-image-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-primary);
}

.about-image-badge svg {
    color: var(--color-green);
}

.about-card-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.about-card {
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    color: white;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.about-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    transition: var(--transition-slow);
}

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

.about-card:hover::before {
    transform: translate(-10%, -10%);
}

.card-blue { background: linear-gradient(135deg, #0A4D8C 0%, #1976D2 100%); }
.card-teal { background: linear-gradient(135deg, #00838F 0%, #00B4D8 100%); }
.card-green { background: linear-gradient(135deg, #06A77D 0%, #4DD9A8 100%); }
.card-purple { background: linear-gradient(135deg, #6C2BD9 0%, #9D5BE8 100%); }

.card-icon-wrap {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    opacity: 0.9;
}

.card-icon-wrap svg {
    width: 100%;
    height: 100%;
}

.about-card h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.about-card p {
    font-size: 14px;
    opacity: 0.8;
}

/* ===========================
   核心业务
   =========================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.service-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

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

.service-card:hover::after {
    transform: scaleX(1);
}

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: var(--transition);
}

.service-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.service-icon-1 { background: linear-gradient(135deg, #0A4D8C, #1976D2); }
.service-icon-2 { background: linear-gradient(135deg, #00838F, #00B4D8); }
.service-icon-3 { background: linear-gradient(135deg, #06A77D, #4DD9A8); }
.service-icon-4 { background: linear-gradient(135deg, #0E9594, #06D6A0); }
.service-icon-5 { background: linear-gradient(135deg, #6C2BD9, #9D5BE8); }
.service-icon-6 { background: linear-gradient(135deg, #E63946, #F77F00); }

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(-5deg);
}

.service-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
}

.service-desc {
    font-size: 14px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.service-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.service-list li {
    font-size: 14px;
    color: var(--color-text-light);
    padding-left: 24px;
    position: relative;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    border-radius: 4px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-green));
    opacity: 0.15;
}

.service-list li::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 4px;
    height: 7px;
    border-right: 2px solid var(--color-accent);
    border-bottom: 2px solid var(--color-accent);
}

/* ===========================
   解决方案
   =========================== */
.solutions-wrapper {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
}

.solution-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 40px;
    border-bottom: 2px solid var(--color-border);
    overflow-x: auto;
    padding-bottom: 0;
}

.solution-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-light);
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition);
    white-space: nowrap;
}

.solution-tab svg {
    color: var(--color-text-light);
    transition: var(--transition);
}

.solution-tab:hover {
    color: var(--color-primary);
}

.solution-tab:hover svg {
    color: var(--color-primary);
}

.solution-tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.solution-tab.active svg {
    color: var(--color-primary);
}

.solution-content {
    min-height: 300px;
}

.solution-panel {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    animation: fadeInUp 0.5s ease;
}

.solution-panel.active {
    display: grid;
}

.solution-info h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
}

.solution-info p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 28px;
}

.solution-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.sol-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.sol-check {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent), var(--color-green));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.sol-check::after {
    content: '';
    width: 5px;
    height: 8px;
    border-right: 2px solid white;
    border-bottom: 2px solid white;
    transform: rotate(45deg) translate(-1px, -1px);
}

.solution-visual {
    display: flex;
    justify-content: center;
}

.sol-visual-card {
    width: 100%;
    max-width: 320px;
    padding: 48px 32px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    border-radius: var(--radius-lg);
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.sol-visual-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.sol-visual-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    opacity: 0.95;
}

.sol-visual-card h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.sol-visual-card p {
    font-size: 14px;
    opacity: 0.85;
}

/* ===========================
   技术优势
   =========================== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}

.advantage-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(10, 77, 140, 0.02) 0%, rgba(0, 180, 216, 0.05) 100%);
    opacity: 0;
    transition: var(--transition);
}

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

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

.adv-number {
    font-size: 48px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
    margin-bottom: 20px;
}

.adv-title {
    font-size: 19px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
}

.adv-desc {
    font-size: 14px;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.tech-stack {
    text-align: center;
    padding: 48px;
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
}

.tech-stack-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 28px;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.tech-tag {
    padding: 8px 20px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: var(--transition);
}

.tech-tag:hover {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
}

/* ===========================
   新闻动态
   =========================== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.news-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.news-card-featured {
    grid-column: span 2;
}

.news-image {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.news-card-featured .news-image {
    aspect-ratio: 16 / 10;
}

.news-img-bg {
    width: 100%;
    height: 100%;
    transition: transform 0.5s ease;
    position: relative;
    overflow: hidden;
}

.news-img-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.news-card:hover .news-img-bg img {
    transform: scale(1.08);
}

.news-img-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(10, 77, 140, 0.3) 100%);
    pointer-events: none;
}

.news-img-bg svg {
    width: 100%;
    height: 100%;
}

.news-category {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
}

.news-content {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-date {
    font-size: 13px;
    color: var(--color-text-light);
    margin-bottom: 10px;
}

.news-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 12px;
    line-height: 1.5;
    transition: var(--transition);
}

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

.news-card-featured .news-title {
    font-size: 22px;
}

.news-excerpt {
    font-size: 14px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-accent);
    transition: var(--transition);
}

.news-link:hover {
    color: var(--color-primary);
    transform: translateX(4px);
}

/* ===========================
   联系我们
   =========================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 64px;
    align-items: start;
}

.contact-heading {
    font-size: 26px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
}

.contact-text {
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    margin-bottom: 36px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 12px rgba(10, 77, 140, 0.2);
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-label {
    display: block;
    font-size: 13px;
    color: var(--color-text-light);
    margin-bottom: 2px;
}

.contact-value {
    display: block;
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
}

.contact-form-wrap {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
}

.form-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 28px;
}

.form-group {
    margin-bottom: 20px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 8px;
}

.required {
    color: #E63946;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    color: var(--color-text);
    background: var(--color-bg-alt);
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-accent);
    background: white;
    box-shadow: 0 0 0 4px rgba(0, 180, 216, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

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

/* ===========================
   页脚
   =========================== */
.footer {
    background: var(--color-bg-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand .nav-logo {
    color: white;
    margin-bottom: 16px;
}

.footer-brand .logo-img {
    color: var(--color-accent);
    box-shadow: 0 2px 8px rgba(0, 180, 216, 0.2);
}

.footer-desc {
    font-size: 14px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.6);
    max-width: 320px;
}

.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: white;
    margin-bottom: 20px;
}

.footer-links li,
.footer-contact li {
    margin-bottom: 12px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--color-accent);
    padding-left: 4px;
}

.footer-contact li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

.footer-bottom {
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-admin-link {
    display: inline-block;
    margin-top: 8px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.35);
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 3px 12px;
    border-radius: 20px;
    transition: color 0.2s, border-color 0.2s;
}

.footer-admin-link:hover {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
}

/* ===========================
   返回顶部
   =========================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(10, 77, 140, 0.4);
}

/* ===========================
   Toast 提示
   =========================== */
.toast {
    position: fixed;
    top: 100px;
    left: 50%;
    transform: translateX(-50%) translateY(-100px);
    background: white;
    padding: 16px 28px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: var(--transition);
    border-left: 4px solid var(--color-green);
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.toast-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-green);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.toast-message {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
}

/* ===========================
   滚动动画
   =========================== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===========================
   资质认证标签墙
   =========================== */
.cert-badges {
    margin-top: 64px;
    text-align: center;
}

.cert-badges-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 24px;
}

.cert-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
}

.cert-tag {
    padding: 10px 22px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

/* ===========================
   客户案例
   =========================== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.case-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.case-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.case-img-bg {
    width: 100%;
    height: 100%;
}

.case-img-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.case-card:hover .case-img-bg img {
    transform: scale(1.08);
}

.case-tag {
    position: absolute;
    top: 14px;
    left: 14px;
    padding: 5px 14px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    border-radius: 999px;
    box-shadow: var(--shadow-sm);
}

.case-content {
    padding: 22px 24px 26px;
}

.case-client {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-accent-dark);
    margin-bottom: 8px;
}

.case-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 10px;
    line-height: 1.4;
}

.case-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ===========================
   合作伙伴
   =========================== */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}

.partner-item {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 84px;
    padding: 16px 12px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.partner-item:hover {
    background: var(--color-surface);
    border-color: var(--color-accent);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.partner-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-align: center;
    transition: var(--transition);
}

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

/* ===========================
   响应式 - 小桌面/大平板（避免导航栏溢出）
   =========================== */
@media (max-width: 1200px) {
    .nav-link {
        padding: 8px 12px;
        font-size: 14px;
    }
    
    .nav-cta {
        padding: 10px 18px;
        font-size: 13px;
    }
    
    .logo-text {
        font-size: 18px;
    }
    
    .nav-container {
        padding: 0 20px;
    }
}

/* ===========================
   响应式 - 平板
   =========================== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .partners-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .news-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .news-card-featured {
        grid-column: span 2;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }
    
    .solution-panel {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .solution-visual {
        order: -1;
    }
}

/* ===========================
   响应式 - 手机
   =========================== */
@media (max-width: 768px) {
    .section {
        padding: 64px 0;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: white;
        flex-direction: column;
        align-items: flex-start;
        padding: 80px 24px 24px;
        gap: 4px;
        transition: right 0.3s ease;
        box-shadow: -10px 0 40px rgba(0,0,0,0.1);
        z-index: 999;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu .nav-link {
        color: var(--color-text);
        width: 100%;
        padding: 12px 16px;
        font-size: 16px;
    }
    
    .nav-menu .nav-link:hover {
        background: var(--color-bg-alt);
    }
    
    .nav-cta {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
        z-index: 1001;
    }
    
    .navbar.scrolled .nav-toggle span {
        background: var(--color-text);
    }
    
    .hide-mobile {
        display: none;
    }
    
    .hero {
        min-height: 100vh;
        padding-top: 100px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 20px;
        justify-content: space-between;
    }
    
    .stat-num, .stat-suffix {
        font-size: 28px;
    }
    
    .stat-divider {
        display: none;
    }
    
    .stat-item {
        flex: 1;
        min-width: 45%;
    }
    
    .scroll-indicator {
        display: none;
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .about-card-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-card-featured {
        grid-column: span 1;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .solutions-wrapper {
        padding: 24px;
    }
    
    .solution-tabs {
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .solution-tab {
        padding: 12px 16px;
        font-size: 14px;
    }
    
    .solution-features {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrap {
        padding: 28px 20px;
    }
    
    .tech-stack {
        padding: 32px 20px;
    }
    
    .container {
        padding: 0 20px;
    }
    
    .back-to-top {
        width: 44px;
        height: 44px;
        bottom: 20px;
        right: 20px;
    }
}

/* ===========================
   响应式 - 小屏手机
   =========================== */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.9rem;
    }
    
    .hero-stats {
        gap: 16px;
    }
    
    .stat-num, .stat-suffix {
        font-size: 24px;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .service-card,
    .advantage-card {
        padding: 28px 20px;
    }
    
    .solutions-wrapper {
        padding: 20px 16px;
    }
}

/* ===========================
   减少动画 - 无障碍
   =========================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .reveal {
        opacity: 1;
        transform: none;
    }
}