/* ==========================================================================
   西安企业数字化转型顾问官网样式表
   ========================================================================== */

    /* 1. 设计系统变量定义 */
:root {
    /* 品牌色彩 */
    --color-primary: #00B7AF;
    --color-primary-hover: #009A93;
    --color-primary-light: rgba(0, 183, 175, 0.08);
    --color-primary-glow: rgba(0, 183, 175, 0.25);
    
    --color-secondary: #0A2540;
    --color-secondary-hover: #0d3052;
    --color-secondary-light: #F4F7FA;
    
    /* 辅助色 */
    --color-success: #00D084;
    --color-success-light: rgba(0, 208, 132, 0.1);
    --color-success-border: rgba(0, 208, 132, 0.2);
    
    --color-warning: #FF9F00;
    --color-warning-light: rgba(255, 159, 0, 0.1);
    --color-warning-border: rgba(255, 159, 0, 0.2);
    
    --color-danger: #FF3B30;
    --color-danger-light: rgba(255, 59, 48, 0.1);
    
    /* 文字颜色 */
    --color-text-dark: #0A2540;
    --color-text-muted: #637381;
    --color-text-light: #919EAB;
    --color-text-white: #FFFFFF;
    
    /* 基础背景色 */
    --color-bg-white: #FFFFFF;
    --color-bg-light: #F8FAFC;
    --color-bg-dark: #09132C;
    --color-bg-darker: #050B1B;
    
    /* 描边与阴影 */
    --border-color: #E2E8F0;
    --shadow-sm: 0 2px 4px rgba(10, 37, 64, 0.04);
    --shadow-md: 0 10px 20px rgba(10, 37, 64, 0.06);
    --shadow-lg: 0 20px 40px rgba(10, 37, 64, 0.1);
    --shadow-primary: 0 10px 25px rgba(0, 183, 175, 0.2);
    
    /* 圆角与字体 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    --font-sans: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    
    /* 容器宽度 */
    --container-width: 1200px;
    --navbar-height: 80px;
}

/* 2. 基础复位与通用样式 */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* 3. 按钮样式组件 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-text-white);
    box-shadow: var(--shadow-sm);
}

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

.btn-secondary {
    background-color: var(--color-secondary-light);
    color: var(--color-primary);
    border: 1px stroke transparent;
}

.btn-secondary:hover {
    background-color: #E6F0FF;
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 1.5px solid var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-text-white);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-sm);
}

.w-full {
    width: 100%;
}

.btn-icon-right svg {
    margin-left: 8px;
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.btn-icon-right:hover svg {
    transform: translateX(4px);
}

/* 4. 头部导航栏 (Navbar) */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--navbar-height);
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    height: 70px;
    box-shadow: var(--shadow-sm);
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-title {
    font-size: 21px;
    font-weight: 700;
    color: var(--color-secondary);
    letter-spacing: 0.5px;
    line-height: 1.2;
}

.logo-subtitle {
    font-size: 11px;
    color: var(--color-text-muted);
    letter-spacing: 2px;
    margin-top: 2px;
}

/* 菜单导航 */
.nav-links {
    display: flex;
    gap: 32px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-dark);
    position: relative;
    padding: 8px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--color-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* 导航栏右侧 */
.nav-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--color-primary);
    font-size: 15px;
}

.phone-icon {
    width: 18px;
    height: 18px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.nav-toggle span {
    width: 100%;
    height: 2.5px;
    background-color: var(--color-secondary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* 手机端菜单 */
.mobile-menu {
    position: fixed;
    top: var(--navbar-height);
    left: 100%;
    width: 100%;
    height: calc(100vh - var(--navbar-height));
    background-color: var(--color-bg-white);
    z-index: 999;
    padding: 32px 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: left 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.mobile-menu.open {
    left: 0;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.mobile-nav-link {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-secondary);
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu-footer {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 40px;
}

.mobile-phone {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
    text-align: center;
}

/* 5. 首屏 (Hero Section) */
.hero-section {
    padding-top: calc(var(--navbar-height) + 40px);
    padding-bottom: 50px;
    background-image: 
        linear-gradient(to right, rgba(240, 246, 255, 0.96) 35%, rgba(240, 246, 255, 0.85) 60%, rgba(240, 246, 255, 0.15) 100%),
        url('assets/hero_bg.jpg');
    background-size: cover;
    background-position: center right;
    background-repeat: no-repeat;
    overflow: hidden;
    position: relative;
}

.hero-container {
    display: flex;
    align-items: center;
    min-height: 360px;
}

.hero-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: 680px;
    width: 100%;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.25;
    color: var(--color-secondary);
    margin-bottom: 16px;
}

.hero-title .highlight {
    color: var(--color-primary);
    position: relative;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--color-text-muted);
    margin-bottom: 28px;
    font-weight: 400;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

.hero-eval-link:hover {
    color: var(--color-primary-hover) !important;
}

.hero-eval-link:hover .eval-arrow {
    transform: translateX(4px);
}

/* 核心指标统计 */
.stats-row {
    display: flex;
    gap: 40px;
}

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

.stat-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

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

.stat-text {
    line-height: 1.3;
}

.stat-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-secondary);
}

.stat-unit {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary);
    margin-left: 2px;
}

.stat-label {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* 6. 核心优势卡片区域 */
.advantages-section {
    padding: 24px 0;
    background-color: var(--color-bg-white);
    margin-top: -30px;
    position: relative;
    z-index: 10;
}

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

.adv-card {
    background-color: var(--color-bg-white);
    border-radius: var(--radius-md);
    padding: 24px 28px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 20px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

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

.adv-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    flex-shrink: 0;
}

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

.adv-icon-blue {
    background-color: rgba(0, 102, 255, 0.08);
    color: var(--color-primary);
}

.adv-icon-orange {
    background-color: rgba(255, 159, 0, 0.08);
    color: var(--color-warning);
}

.adv-icon-green {
    background-color: rgba(0, 208, 132, 0.08);
    color: var(--color-success);
}

.adv-info {
    flex-grow: 1;
}

.adv-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 4px;
}

.adv-desc {
    font-size: 13px;
    color: var(--color-text-muted);
}

.adv-sub {
    font-size: 12px;
    color: var(--color-text-light);
    margin-top: 2px;
}

.adv-arrow {
    color: var(--color-text-light);
    opacity: 0.5;
    transition: all 0.3s ease;
}

.adv-arrow svg {
    width: 20px;
    height: 20px;
}

.adv-card:hover .adv-arrow {
    color: var(--color-primary);
    opacity: 1;
    transform: translateX(4px);
}

/* 7. 通用左右区块布局服务 */
.services-section, .cases-section, .pricing-section {
    padding: 100px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.services-container, .cases-container, .pricing-container {
    display: grid;
    grid-template-columns: 0.3fr 0.7fr;
    gap: 64px;
    align-items: start;
}

.section-left {
    position: sticky;
    top: 120px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-secondary);
    line-height: 1.3;
    margin-bottom: 12px;
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-muted);
    margin-bottom: 32px;
}

/* 8. 服务卡片列表 (Accordion Style) */
.service-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.service-card {
    background-color: var(--color-bg-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all 0.3s ease;
}

.service-card:hover {
    border-color: var(--color-primary-glow);
    box-shadow: var(--shadow-md);
}

.service-card.active {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.service-header {
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
}

.service-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.service-icon svg {
    width: 22px;
    height: 22px;
}

.service-title-group h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-secondary);
}

.service-title-group p {
    font-size: 12px;
    color: var(--color-text-light);
}

.service-badges {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 32px;
    margin-right: auto;
    flex-wrap: wrap;
}

.badge {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
}

.badge-red {
    background-color: var(--color-danger-light);
    color: var(--color-danger);
}

.badge-blue {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.badge-text {
    font-size: 13px;
    color: var(--color-text-dark);
    margin-right: 16px;
}

.service-toggle {
    color: var(--color-text-light);
    transition: transform 0.3s ease;
}

.service-toggle svg {
    width: 20px;
    height: 20px;
}

.service-card.active .service-toggle {
    transform: rotate(180deg);
    color: var(--color-primary);
}

.service-body {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.service-card.active .service-body {
    padding: 0 24px 24px 88px;
    max-height: 200px;
}

.service-body p {
    color: var(--color-text-muted);
    font-size: 14px;
    line-height: 1.6;
}

/* 9. 客户案例区域 */
.case-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 600;
    transition: gap 0.3s ease;
}

.case-link svg {
    width: 16px;
    height: 16px;
}

.case-link:hover {
    gap: 12px;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.case-card {
    background-color: var(--color-bg-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-glow);
}

.case-header {
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 16px;
}

.case-tag {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
    margin-bottom: 10px;
}

.tag-blue {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.tag-green {
    background-color: var(--color-success-light);
    color: var(--color-success);
}

.tag-orange {
    background-color: var(--color-warning-light);
    color: var(--color-warning);
}

.case-company {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-secondary);
}

.case-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.detail-row {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.detail-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-val {
    font-size: 13px;
    color: var(--color-text-dark);
    line-height: 1.5;
}

.detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.detail-tags span {
    background-color: var(--color-bg-light);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 11px;
    color: var(--color-text-muted);
}

/* 10. 价格方案区域 */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    align-items: stretch;
}

.price-card {
    background-color: var(--color-bg-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    padding: 32px 24px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.3s ease;
    position: relative;
}

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

/* 推荐版高亮 */
.price-card.recommended {
    border: 2px solid var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: scale(1.03);
    z-index: 2;
}

.price-card.recommended:hover {
    box-shadow: var(--shadow-lg), var(--shadow-primary);
}

.recommend-badge {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--color-primary);
    color: var(--color-text-white);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-primary);
}

.price-header {
    text-align: center;
    margin-bottom: 24px;
}

.price-level {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    display: block;
    margin-bottom: 12px;
}

.price-value {
    color: var(--color-secondary);
    display: flex;
    justify-content: center;
    align-items: baseline;
}

.price-currency {
    font-size: 20px;
    font-weight: 600;
    margin-right: 4px;
}

.price-num {
    font-size: 40px;
    font-weight: 700;
}

.price-period {
    font-size: 14px;
    color: var(--color-text-light);
    margin-left: 4px;
}

.price-features {
    margin-bottom: 32px;
    flex-grow: 1;
}

.price-features ul {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.price-features li {
    font-size: 13.5px;
    color: var(--color-text-dark);
    display: flex;
    align-items: start;
    gap: 10px;
}

.check-icon {
    width: 18px;
    height: 18px;
    color: var(--color-success);
    flex-shrink: 0;
    margin-top: 2px;
}

/* 关于我们区域 (About Us Section) */
.about-section {
    background-color: var(--color-bg-white);
    padding: 100px 0;
    border-bottom: 1px solid var(--border-color);
}

.about-container {
    display: grid;
    grid-template-columns: 0.35fr 0.65fr;
    gap: 64px;
    align-items: start;
}

.about-intro p {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.8;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.about-card {
    background-color: var(--color-bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: all 0.3s ease;
}

.about-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary-glow);
    box-shadow: var(--shadow-md);
    background-color: var(--color-bg-white);
}

.about-card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    margin-bottom: 20px;
}

.about-card-icon svg {
    width: 22px;
    height: 22px;
}

.about-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 10px;
}

.about-card p {
    font-size: 13.5px;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* 联系我们区域 (Contact Us Section) */
.contact-section {
    background-color: var(--color-bg-light);
    padding: 100px 0;
    border-bottom: 1px solid var(--border-color);
}

.contact-container {
    display: grid;
    grid-template-columns: 0.35fr 0.65fr;
    gap: 64px;
    align-items: start;
}

.contact-info-card {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-info-item {
    background-color: var(--color-bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: var(--shadow-sm);
}

.info-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    flex-shrink: 0;
}

.info-icon svg {
    width: 20px;
    height: 20px;
}

.info-content span {
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text-light);
    text-transform: uppercase;
    display: block;
    margin-bottom: 2px;
}

.info-content a {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-secondary);
}

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

.info-content p {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-secondary);
}

/* 留言表单 (Feedback Form) */
.feedback-form-wrapper {
    background-color: var(--color-bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.feedback-form-wrapper h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 8px;
}

.form-sub {
    font-size: 13.5px;
    color: var(--color-text-muted);
    margin-bottom: 28px;
    line-height: 1.6;
}

.feedback-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-secondary);
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--color-bg-light);
    color: var(--color-secondary);
    font-size: 14px;
    font-family: var(--font-sans);
    transition: all 0.3s ease;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--color-bg-white);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.form-group textarea {
    resize: vertical;
}

/* 11. 页脚 (Footer) */
.footer {
    background-color: var(--color-bg-dark);
    color: var(--color-text-white);
    padding: 80px 0 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 0.8fr 0.8fr 1.2fr 1.2fr;
    gap: 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 60px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--color-text-white);
    letter-spacing: 0.5px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-col a {
    color: var(--color-text-light);
    font-size: 13.5px;
}

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

/* 品牌侧 */
.col-brand {
    display: flex;
    flex-direction: column;
}

.footer-logo {
    margin-bottom: 8px;
}

.text-white {
    color: var(--color-text-white);
}

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

.brand-desc {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-top: 16px;
}

/* 联系列表 */
.contact-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.contact-list li {
    font-size: 13px;
    color: var(--color-text-light);
    display: flex;
    align-items: start;
    gap: 10px;
}

.contact-icon {
    width: 16px;
    height: 16px;
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

/* 二维码列 */
.col-qr {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.qr-card {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    padding: 16px;
    text-align: center;
    width: 100%;
    max-width: 150px;
}

.qr-img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    margin-bottom: 10px;
}

.qr-card p {
    font-size: 11px;
    color: var(--color-text-light);
    line-height: 1.3;
}

/* 页脚底层 */
.footer-bottom {
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    background-color: var(--color-bg-darker);
}

.footer-bottom p {
    font-size: 12px;
    color: var(--color-text-light);
}

/* 12. 弹窗 (Modal Container) */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(9, 19, 44, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background-color: var(--color-bg-white);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 580px;
    box-shadow: 0 30px 60px rgba(9, 19, 44, 0.3);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    transform: scale(0.9);
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.open .modal-card {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background-color: var(--color-bg-light);
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    z-index: 10;
}

.modal-close:hover {
    background-color: #E2E8F0;
    color: var(--color-secondary);
}

.modal-header {
    padding: 32px 32px 16px 32px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
}

.modal-title-icon {
    width: 24px;
    height: 24px;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-secondary);
}

.modal-body {
    padding: 32px;
}

.modal-intro {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 24px;
    line-height: 1.6;
}

.modal-contact-info {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 32px;
    align-items: center;
}

.modal-qr-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    border-right: 1px dashed var(--border-color);
    padding-right: 16px;
}

.modal-qr {
    width: 140px;
    height: 140px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    padding: 4px;
}

.modal-qr-section span {
    font-size: 12px;
    color: var(--color-text-muted);
    font-weight: 500;
}

.modal-phone-section {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.modal-phone-box {
    background-color: var(--color-bg-light);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--border-color);
    text-align: center;
}

.phone-label {
    font-size: 11px;
    font-weight: 600;
    color: var(--color-text-muted);
    display: block;
    margin-bottom: 6px;
    text-transform: uppercase;
}

.phone-link {
    font-size: 26px;
    font-weight: 700;
    color: var(--color-primary);
    display: block;
    margin-bottom: 8px;
}

.phone-link:hover {
    color: var(--color-primary-hover);
}

.phone-hours {
    font-size: 11px;
    color: var(--color-text-light);
}

.modal-footer {
    padding: 20px 32px;
    background-color: var(--color-bg-light);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
}

/* 13. 媒体查询 - 响应式设计 (Media Queries) */
@media (max-width: 1200px) {
    .container {
        padding: 0 20px;
    }
    
    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
    }
    
    .col-qr {
        align-items: flex-start;
    }
}

@media (max-width: 992px) {
    /* Navbar */
    .nav-links, .nav-right .nav-phone {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    /* Hero */
    .hero-section {
        background-image: 
            linear-gradient(to bottom, rgba(240, 246, 255, 0.95) 0%, rgba(240, 246, 255, 0.92) 80%, rgba(240, 246, 255, 0.85) 100%),
            url('assets/hero_bg.jpg');
        background-position: center center;
        text-align: center;
        padding-top: calc(var(--navbar-height) + 40px);
        padding-bottom: 60px;
    }

    .hero-container {
        justify-content: center;
        min-height: auto;
    }
    
    .hero-content {
        align-items: center;
        max-width: 100%;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .stats-row {
        justify-content: center;
        width: 100%;
    }
    
    /* Advantages */
    .advantages-container {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    /* Section splits */
    .services-container, .cases-container, .pricing-container, .about-container, .contact-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .section-left {
        position: static;
        text-align: center;
    }
    
    .section-desc {
        margin-bottom: 24px;
    }
    
    /* Cases */
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    /* Pricing */
    .pricing-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        max-width: 450px;
        margin: 0 auto;
    }
    
    .price-card.recommended {
        transform: scale(1);
    }
}

@media (max-width: 600px) {
    .hero-title {
        font-size: 30px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .stats-row {
        flex-direction: column;
        gap: 20px;
        align-items: flex-start;
        padding-left: 20%;
    }
    
    .service-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    
    .service-badges {
        margin-left: 0;
        margin-top: 8px;
    }
    
    .service-card.active .service-body {
        padding: 0 20px 20px 20px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .feedback-form-wrapper {
        padding: 24px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .modal-contact-info {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .modal-qr-section {
        border-right: none;
        border-bottom: 1px dashed var(--border-color);
        padding-right: 0;
        padding-bottom: 24px;
    }
}

/* QR Code Tech Decoration */
.qr-wrapper {
    position: relative;
    padding: 10px;
    background: white;
    border-radius: 8px;
    display: inline-block;
    box-shadow: 0 8px 24px rgba(10, 37, 64, 0.05);
    margin-bottom: 12px;
}

.qr-wrapper .corner {
    position: absolute;
    width: 14px;
    height: 14px;
    border: 2px solid var(--color-primary);
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.qr-wrapper .corner.top-left {
    top: 0;
    left: 0;
    border-right: none;
    border-bottom: none;
    border-top-left-radius: 6px;
}

.qr-wrapper .corner.top-right {
    top: 0;
    right: 0;
    border-left: none;
    border-bottom: none;
    border-top-right-radius: 6px;
}

.qr-wrapper .corner.bottom-left {
    bottom: 0;
    left: 0;
    border-right: none;
    border-top: none;
    border-bottom-left-radius: 6px;
}

.qr-wrapper .corner.bottom-right {
    bottom: 0;
    right: 0;
    border-left: none;
    border-top: none;
    border-bottom-right-radius: 6px;
}

.qr-wrapper:hover .corner.top-left { transform: translate(-3px, -3px); }
.qr-wrapper:hover .corner.top-right { transform: translate(3px, -3px); }
.qr-wrapper:hover .corner.bottom-left { transform: translate(-3px, 3px); }
.qr-wrapper:hover .corner.bottom-right { transform: translate(3px, 3px); }