/* ============================================
   盖迪高定 - 统一设计系统 CSS
   版本: 2.0
   更新日期: 2026-03-26
   ============================================ */

/* ----------------------------------------
   1. CSS变量设计系统
   ---------------------------------------- */
:root {
    /* 主色调 - 专业深蓝 */
    --primary-900: #0f172a;
    --primary-800: #1e293b;
    --primary-700: #334155;
    --primary-600: #475569;
    --primary-500: #64748b;

    /* 品牌强调色 - 工装橙 (统一所有橙色) */
    --brand-600: #e55a2b;
    --brand-500: #ff6b35;
    --brand-400: #ff8c5a;
    --brand-300: #ffaa80;
    --brand-100: #ffe8e0;

    /* 中性色 */
    --neutral-50: #f8fafc;
    --neutral-100: #f1f5f9;
    --neutral-200: #e2e8f0;
    --neutral-300: #cbd5e1;
    --neutral-400: #94a3b8;
    --neutral-500: #64748b;
    --neutral-600: #475569;
    --neutral-700: #334155;
    --neutral-800: #1e293b;
    --neutral-900: #0f172a;

    /* 功能色 */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;

    /* 向后兼容的旧变量名 */
    --primary-dark: var(--primary-800);
    --primary: var(--primary-600);
    --accent: var(--brand-500);
    --accent-hover: var(--brand-600);
    --bg-light: var(--neutral-100);
    --bg-white: #ffffff;
    --text-dark: var(--neutral-900);
    --text-gray: var(--neutral-600);

    /* 字体系统 */
    --font-display: 'Noto Serif SC', serif;
    --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* 字体大小比例 (1.125比例尺) */
    --text-xs: 0.75rem;      /* 12px */
    --text-sm: 0.875rem;     /* 14px */
    --text-base: 1rem;       /* 16px */
    --text-lg: 1.125rem;     /* 18px */
    --text-xl: 1.25rem;      /* 20px */
    --text-2xl: 1.5rem;      /* 24px */
    --text-3xl: 1.875rem;    /* 30px */
    --text-4xl: 2.25rem;     /* 36px */
    --text-5xl: 3rem;        /* 48px */
    --text-6xl: 3.75rem;     /* 60px */

    /* 行高 */
    --leading-tight: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;

    /* 字重 */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* 间距系统 (基于4px) */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */

    /* 区块间距 */
    --section-padding-y: clamp(3rem, 8vw, 6rem);

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* 高级缓动函数 */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
    --ease-in-out-back: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* 移动端间距调整 */
@media (max-width: 768px) {
    :root {
        --section-padding-y: clamp(2rem, 5vw, 3rem);
    }
}

/* ----------------------------------------
   2. 基础样式重置
   ---------------------------------------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-dark);
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-5);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-4);
    }
}

/* ----------------------------------------
   3. 排版工具类
   ---------------------------------------- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-display { font-family: var(--font-display); }
.font-body { font-family: var(--font-body); }

/* ----------------------------------------
   4. 按钮组件系统
   ---------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-weight: var(--font-medium);
    border-radius: var(--radius-md);
    transition: all 0.2s var(--ease-out-quart);
    cursor: pointer;
    border: none;
    text-decoration: none;
    line-height: 1;
}

.btn--sm { padding: var(--space-2) var(--space-3); font-size: var(--text-sm); }
.btn--md { padding: var(--space-3) var(--space-5); font-size: var(--text-base); }
.btn--lg { padding: var(--space-4) var(--space-6); font-size: var(--text-lg); }

.btn--primary {
    background: linear-gradient(135deg, var(--brand-500) 0%, var(--brand-400) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
}

.btn--primary:hover {
    background: linear-gradient(135deg, var(--brand-600) 0%, var(--brand-500) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
}

.btn--primary:active {
    transform: scale(0.98);
}

.btn--secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn--secondary:hover {
    background-color: white;
    color: var(--primary-800);
}

.btn--secondary-dark {
    background: transparent;
    color: var(--neutral-700);
    border: 2px solid var(--neutral-300);
}

.btn--secondary-dark:hover {
    border-color: var(--brand-500);
    color: var(--brand-500);
}

/* 向后兼容 */
.btn-primary {
    composes: btn btn--md btn--primary;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-weight: var(--font-medium);
    border-radius: var(--radius-md);
    transition: all 0.2s var(--ease-out-quart);
    cursor: pointer;
    border: none;
    text-decoration: none;
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-base);
    background: linear-gradient(135deg, var(--brand-500) 0%, var(--brand-400) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(249, 115, 22, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--brand-600) 0%, var(--brand-500) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
}

.btn-secondary {
    composes: btn btn--md btn--secondary;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-weight: var(--font-medium);
    border-radius: var(--radius-md);
    transition: all 0.2s var(--ease-out-quart);
    cursor: pointer;
    border: 2px solid white;
    text-decoration: none;
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-base);
    background: transparent;
    color: white;
}

.btn-secondary:hover {
    background-color: white;
    color: var(--primary-800);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-weight: var(--font-medium);
    border-radius: var(--radius-md);
    transition: all 0.2s var(--ease-out-quart);
    cursor: pointer;
    border: 2px solid rgba(255, 255, 255, 0.8);
    text-decoration: none;
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-base);
    background: transparent;
    color: white;
}

.btn-outline:hover {
    background-color: white;
    color: var(--primary-800);
    border-color: white;
}

.btn-large {
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-lg);
}

/* 按钮脉冲动画 */
@keyframes btn-pulse {
    0%, 100% { box-shadow: 0 4px 15px rgba(249, 115, 22, 0.3); }
    50% { box-shadow: 0 4px 25px rgba(249, 115, 22, 0.5); }
}

.btn--primary:hover {
    animation: btn-pulse 1s infinite;
}

/* ----------------------------------------
   5. 导航栏
   ---------------------------------------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(15, 23, 42, 0.1);
    transition: transform 0.3s var(--ease-smooth);
}

.header.hide-on-scroll {
    transform: translateY(-100%);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) 0;
}

.logo a {
    font-family: var(--font-display);
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--primary-800);
    text-decoration: none;
    transition: color 0.3s ease;
}

.logo a:hover {
    color: var(--brand-500);
}

.logo span {
    color: var(--brand-500);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-8);
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: var(--font-medium);
    transition: color 0.3s ease;
    position: relative;
    font-size: var(--text-sm);
    padding: var(--space-2) 0;
}

.nav-menu a:hover {
    color: var(--brand-500);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--brand-500), var(--brand-400));
    transition: width 0.3s var(--ease-out-expo);
}

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

/* 当前页面高亮 */
.nav-menu a[aria-current="page"] {
    color: var(--brand-500);
    font-weight: var(--font-semibold);
}

.nav-menu a.btn-primary {
    padding: var(--space-3) var(--space-6);
    color: white;
    border-radius: var(--radius-lg);
}

.nav-menu a.btn-primary:hover {
    color: white;
}

.nav-menu a.btn-primary::after {
    display: none;
}

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.dropdown > a i {
    font-size: 0.75em;
    margin-left: 4px;
    transition: transform 0.3s ease;
}

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

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    min-width: 200px;
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.15);
    border-radius: var(--radius-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s var(--ease-smooth);
    list-style: none;
    padding: var(--space-2) 0;
    border: 1px solid var(--neutral-200);
}

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

.dropdown-menu li {
    padding: 0;
}

.dropdown-menu a {
    display: block;
    padding: var(--space-3) var(--space-5);
    color: var(--text-dark);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: var(--text-sm);
}

.dropdown-menu a:hover {
    background-color: var(--neutral-100);
    color: var(--brand-500);
}

/* ----------------------------------------
   6. 汉堡菜单动画
   ---------------------------------------- */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    width: 32px;
    height: 32px;
    cursor: pointer;
    gap: 6px;
    padding: 4px;
    background: transparent;
    border: none;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--neutral-800);
    border-radius: 2px;
    transition: all 0.3s var(--ease-smooth);
    transform-origin: center;
}

.hamburger.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ----------------------------------------
   7. Hero区域
   ---------------------------------------- */
.hero {
    min-height: 100vh;
    background: linear-gradient(rgba(15, 23, 42, 0.7), rgba(15, 23, 42, 0.7)), url('../images/hero-bg.png');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    position: relative;
    margin-top: 80px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.5);
}

.hero-content {
    position: relative;
    z-index: 1;
    color: white;
    max-width: 800px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.75rem);
    font-weight: var(--font-bold);
    margin-bottom: var(--space-5);
    line-height: var(--leading-tight);
}

.hero-subtitle {
    font-size: var(--text-xl);
    margin-bottom: var(--space-8);
    opacity: 0.95;
    font-weight: var(--font-normal);
    line-height: var(--leading-relaxed);
}

/* Hero数据指标 */
.hero-stats {
    display: flex;
    gap: var(--space-10);
    margin-bottom: var(--space-10);
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--brand-400);
    line-height: 1;
}

.stat-unit {
    font-size: var(--text-xl);
    font-weight: var(--font-medium);
}

.stat-label {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.8);
    margin-top: var(--space-1);
}

.hero-buttons {
    display: flex;
    gap: var(--space-5);
    flex-wrap: wrap;
}

.hero-buttons .btn-primary i,
.hero-buttons .btn-secondary i {
    margin-right: var(--space-2);
}

/* ----------------------------------------
   8. 区块标题
   ---------------------------------------- */
.section-header {
    text-align: center;
    margin-bottom: var(--space-12);
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    margin-bottom: var(--space-3);
    color: var(--neutral-900);
    line-height: var(--leading-tight);
}

.section-header p {
    font-size: var(--text-lg);
    color: var(--neutral-500);
    max-width: 600px;
    margin: 0 auto;
}

/* ----------------------------------------
   9. 特性区域
   ---------------------------------------- */
.features {
    padding: var(--section-padding-y) 0;
    background-color: var(--neutral-50);
}

.features-section {
    padding: var(--section-padding-y) 0;
    background-color: var(--neutral-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
}

.feature-card {
    background: white;
    padding: var(--space-10) var(--space-8);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.4s var(--ease-out-expo), box-shadow 0.4s ease;
    will-change: transform;
}

.feature-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background-color: var(--neutral-100);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-6);
    transition: transform 0.4s var(--ease-spring), background-color 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    background-color: var(--brand-100);
}

.feature-icon i {
    font-size: 32px;
    color: var(--brand-500);
    transition: color 0.3s ease;
}

.feature-card h3 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-3);
    color: var(--neutral-900);
    font-weight: var(--font-semibold);
}

.feature-card p {
    color: var(--neutral-600);
    margin-bottom: var(--space-5);
    line-height: var(--leading-relaxed);
}

.feature-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-5);
    margin-top: var(--space-5);
    padding-top: var(--space-5);
    border-top: 1px solid var(--neutral-200);
}

.feature-stats .stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
}

.feature-stats .stat strong {
    font-size: var(--text-lg);
    color: var(--brand-500);
    font-weight: var(--font-bold);
}

.feature-stats .stat span {
    font-size: var(--text-sm);
    color: var(--neutral-500);
    font-weight: var(--font-medium);
}

/* ----------------------------------------
   10. 解决方案预览
   ---------------------------------------- */
.solutions-preview {
    padding: var(--section-padding-y) 0;
}

.solutions-section {
    padding: var(--section-padding-y) 0;
    background: var(--neutral-50);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-8);
}

.solution-card {
    background: white;
    padding: var(--space-10) var(--space-8);
    border-radius: var(--radius-lg);
    text-align: center;
    text-decoration: none;
    color: inherit;
    border: 1px solid var(--neutral-200);
    transition: all 0.4s var(--ease-out-expo);
    will-change: transform;
}

.solution-card:hover {
    border-color: var(--brand-500);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.solution-icon {
    width: 60px;
    height: 60px;
    background-color: var(--neutral-100);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-5);
    transition: all 0.3s var(--ease-spring);
}

.solution-card:hover .solution-icon {
    background-color: var(--brand-100);
    transform: scale(1.1);
}

.solution-icon i {
    font-size: 24px;
    color: var(--neutral-800);
    transition: color 0.3s ease;
}

.solution-card:hover .solution-icon i {
    color: var(--brand-500);
}

.solution-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
    color: var(--neutral-900);
    font-weight: var(--font-semibold);
}

.solution-card p {
    color: var(--neutral-500);
    margin-bottom: var(--space-5);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

.solution-link {
    color: var(--brand-500);
    font-weight: var(--font-medium);
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    transition: gap 0.3s ease;
}

.solution-card:hover .solution-link {
    gap: var(--space-2);
}

/* ----------------------------------------
   10b. 多行业定制经验
   ---------------------------------------- */
.industries-section {
    padding: var(--section-padding-y) 0;
    background: white;
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-8);
}

.industry-card {
    background: white;
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    border: 1px solid var(--neutral-200);
    text-align: center;
    transition: all 0.4s var(--ease-out-expo);
    will-change: transform;
}

.industry-card:hover {
    border-color: var(--brand-500);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.industry-icon {
    width: 60px;
    height: 60px;
    background-color: var(--brand-100);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-5);
}

.industry-icon i {
    font-size: 24px;
    color: var(--brand-500);
}

.industry-card h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
    color: var(--neutral-900);
    font-weight: var(--font-semibold);
}

.industry-card > p {
    color: var(--neutral-500);
    font-size: var(--text-sm);
    margin-bottom: var(--space-5);
}

.industry-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
    text-align: left;
}

.industry-card ul li {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) 0;
    color: var(--neutral-600);
    font-size: var(--text-sm);
}

.industry-card ul li i {
    color: var(--brand-500);
    font-size: 12px;
}

/* ----------------------------------------
   11. 产品预览
   ---------------------------------------- */
.products-preview {
    padding: var(--section-padding-y) 0;
    background-color: var(--neutral-100);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-10);
}

.product-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(15, 23, 42, 0.08);
    transition: all 0.4s var(--ease-out-expo);
    will-change: transform;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(15, 23, 42, 0.12);
}

.product-image {
    width: 100%;
    height: 200px;
    background-color: var(--neutral-100);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s var(--ease-out-expo);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-image-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--neutral-100) 0%, var(--neutral-200) 100%);
}

.product-image-placeholder i {
    font-size: 60px;
    color: var(--primary-600);
    opacity: 0.3;
}

.product-info {
    padding: var(--space-6);
}

.product-info h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
    color: var(--neutral-900);
    font-weight: var(--font-semibold);
}

.product-info p {
    color: var(--neutral-500);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-3);
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.product-feature-tag {
    background-color: var(--neutral-100);
    color: var(--primary-600);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--brand-500);
    text-decoration: none;
    font-weight: var(--font-medium);
    font-size: var(--text-sm);
    margin-top: var(--space-4);
    transition: all 0.3s ease;
}

.product-link:hover {
    color: var(--brand-600);
    gap: var(--space-2);
}

/* ----------------------------------------
   12. 面料与工艺
   ---------------------------------------- */
.materials-preview {
    padding: var(--section-padding-y) 0;
}

.materials-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    align-items: center;
}

.materials-text h2 {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    margin-bottom: var(--space-5);
    color: var(--neutral-900);
}

.materials-text .lead {
    font-size: var(--text-lg);
    color: var(--neutral-500);
    margin-bottom: var(--space-8);
    line-height: var(--leading-relaxed);
}

.materials-list {
    list-style: none;
    margin-bottom: var(--space-8);
}

.materials-list li {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--neutral-200);
    display: flex;
    align-items: center;
}

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

.materials-list li strong {
    color: var(--neutral-900);
    min-width: 120px;
    font-weight: var(--font-semibold);
}

.materials-image .image-placeholder {
    width: 100%;
    height: 400px;
    background-color: var(--neutral-100);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--neutral-400);
}

.materials-image .image-placeholder i {
    font-size: 60px;
    margin-bottom: var(--space-5);
}

/* ----------------------------------------
   13. 案例预览
   ---------------------------------------- */
.cases-preview {
    padding: var(--section-padding-y) 0;
    background-color: var(--neutral-50);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-8);
    margin-bottom: var(--space-10);
}

.case-card {
    background: white;
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.4s var(--ease-out-expo);
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--neutral-200);
}

.case-header h3 {
    font-size: var(--text-lg);
    color: var(--neutral-900);
    font-weight: var(--font-semibold);
}

.case-industry {
    background: linear-gradient(135deg, var(--brand-500) 0%, var(--brand-400) 100%);
    color: white;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
}

.case-content p {
    margin-bottom: var(--space-2);
    color: var(--neutral-500);
    font-size: var(--text-sm);
}

.case-content strong {
    color: var(--neutral-900);
    font-weight: var(--font-semibold);
}

/* ----------------------------------------
   13b. 客户评价
   ---------------------------------------- */
.testimonials-section {
    padding: var(--section-padding-y) 0;
    background: var(--neutral-50);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-8);
}

.testimonial-card {
    background: white;
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.3s var(--ease-out-expo), box-shadow 0.3s ease;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

.testimonial-content {
    margin-bottom: var(--space-6);
}

.testimonial-content p {
    color: var(--neutral-600);
    line-height: var(--leading-relaxed);
    font-size: var(--text-base);
    position: relative;
    padding-left: var(--space-6);
}

.testimonial-content p::before {
    content: '"';
    position: absolute;
    left: 0;
    top: -5px;
    font-size: 48px;
    color: var(--brand-200);
    font-family: Georgia, serif;
    line-height: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding-top: var(--space-5);
    border-top: 1px solid var(--neutral-100);
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: var(--neutral-100);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-avatar i {
    font-size: 32px;
    color: var(--neutral-400);
}

.author-info h4 {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--neutral-900);
    margin-bottom: 2px;
}

.author-info p {
    font-size: var(--text-sm);
    color: var(--neutral-500);
    margin: 0;
}

.author-info .company {
    font-size: var(--text-xs);
    color: var(--brand-500);
    margin-top: 2px;
    display: block;
}

@media (max-width: 768px) {
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

/* ----------------------------------------
   14. 信任徽章
   ---------------------------------------- */
.trust-badges {
    padding: var(--space-16) 0;
    background-color: var(--bg-white);
    border-top: 1px solid var(--neutral-200);
    border-bottom: 1px solid var(--neutral-200);
}

.badges-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-16);
    flex-wrap: wrap;
}

.badge-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    color: var(--neutral-500);
    transition: all 0.3s var(--ease-out-expo);
}

.badge-item:hover {
    color: var(--primary-800);
    transform: translateY(-3px);
}

.badge-item i {
    font-size: 32px;
    color: var(--brand-500);
    transition: transform 0.3s var(--ease-spring);
}

.badge-item:hover i {
    transform: scale(1.1);
}

.badge-item span {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
}

/* ----------------------------------------
   15. CTA区域
   ---------------------------------------- */
.cta-section {
    padding: var(--section-padding-y) 0;
    background: linear-gradient(135deg, var(--primary-800) 0%, var(--primary-600) 100%);
    color: white;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.cta-content h2 {
    font-family: var(--font-display);
    font-size: var(--text-3xl);
    margin-bottom: var(--space-5);
    line-height: var(--leading-tight);
}

.cta-content p {
    font-size: var(--text-lg);
    margin-bottom: var(--space-10);
    opacity: 0.9;
}

.cta-form {
    background: rgba(255, 255, 255, 0.1);
    padding: var(--space-10);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-buttons {
    display: flex;
    gap: var(--space-5);
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.cta-buttons .btn-primary i,
.cta-buttons .btn-outline i {
    margin-right: var(--space-2);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-5);
    margin-bottom: var(--space-8);
}

.form-group select,
.form-group input {
    width: 100%;
    padding: var(--space-4);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: var(--text-base);
    transition: all 0.3s ease;
}

.form-group select:focus,
.form-group input:focus {
    outline: none;
    border-color: var(--brand-500);
    box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.1);
    transform: translateY(-1px);
}

.form-group select::placeholder,
.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.form-group select option {
    color: var(--neutral-800);
    background: white;
}

.form-note {
    margin-top: var(--space-5);
    font-size: var(--text-sm);
    opacity: 0.8;
}

/* 表单错误提示 */
.form-error {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--error);
    font-size: var(--text-sm);
    margin-top: var(--space-1);
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.form-error.show {
    opacity: 1;
    transform: translateY(0);
}

/* 提交按钮加载状态 */
.btn-submit {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--brand-500) 0%, var(--brand-400) 100%);
    color: white;
    border: none;
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
}

.btn-submit.loading {
    color: transparent;
}

.btn-submit .spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* ----------------------------------------
   16. 页脚
   ---------------------------------------- */
.footer {
    background-color: var(--neutral-900);
    color: white;
    padding: var(--space-20) 0 var(--space-8);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-10);
    margin-bottom: var(--space-12);
}

.footer-col h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-6);
    color: white;
    font-weight: var(--font-semibold);
}

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

.footer-col ul li {
    margin-bottom: var(--space-3);
}

.footer-col ul li a {
    color: var(--neutral-400);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-col ul li a:hover {
    color: white;
    transform: translateX(4px);
}

.footer-description {
    color: var(--neutral-400);
    margin: var(--space-5) 0;
    line-height: var(--leading-relaxed);
    font-size: var(--text-sm);
}

.social-links {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.social-links a {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s var(--ease-out-expo);
}

.social-links a:hover {
    background-color: var(--brand-500);
    transform: translateY(-3px);
}

/* 页脚公众号二维码弹窗 */
.social-links .weixin-link {
    position: relative;
}

.social-links .weixin-qr-popup {
    position: absolute;
    bottom: 55px;
    left: 50%;
    transform: translateX(-50%) scale(0);
    width: 140px;
    height: 140px;
    background: white;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s var(--ease-smooth);
    z-index: 100;
    padding: var(--space-2);
    border: 2px solid var(--brand-500);
}

.social-links .weixin-qr-popup img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: var(--radius-sm);
}

.social-links .weixin-link:hover .weixin-qr-popup {
    transform: translateX(-50%) scale(1);
    opacity: 1;
    visibility: visible;
}

.social-links .weixin-qr-popup::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid var(--brand-500);
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
    color: var(--neutral-400);
    font-size: var(--text-sm);
}

.contact-info i {
    color: var(--brand-500);
    width: 16px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--space-8);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--neutral-500);
    font-size: var(--text-sm);
}

.footer-bottom p {
    margin-bottom: var(--space-2);
}

.footer-bottom a {
    color: var(--neutral-500);
    text-decoration: none;
    margin: 0 var(--space-2);
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: white;
}

/* ----------------------------------------
   17. 滚动入场动画
   ---------------------------------------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

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

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

.scroll-animate {
    opacity: 0;
}

.scroll-animate.animate {
    animation: fadeInUp 0.6s var(--ease-out-expo) forwards;
}

.scroll-animate.fade-in.animate {
    animation: fadeIn 0.6s var(--ease-out-expo) forwards;
}

.scroll-animate.scale-in.animate {
    animation: scaleIn 0.6s var(--ease-out-expo) forwards;
}

.scroll-animate.slide-left.animate {
    animation: slideInLeft 0.6s var(--ease-out-expo) forwards;
}

.scroll-animate.slide-right.animate {
    animation: slideInRight 0.6s var(--ease-out-expo) forwards;
}

/* 错开动画延迟 */
.scroll-animate:nth-child(1) { animation-delay: 0s; }
.scroll-animate:nth-child(2) { animation-delay: 0.1s; }
.scroll-animate:nth-child(3) { animation-delay: 0.2s; }
.scroll-animate:nth-child(4) { animation-delay: 0.3s; }
.scroll-animate:nth-child(5) { animation-delay: 0.4s; }
.scroll-animate:nth-child(6) { animation-delay: 0.5s; }

/* ----------------------------------------
   18. Toast通知系统
   ---------------------------------------- */
.toast-container {
    position: fixed;
    top: 100px;
    right: var(--space-5);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    border-radius: var(--radius-md);
    color: white;
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transform: translateX(100%);
    opacity: 0;
    transition: all 0.4s var(--ease-out-expo);
    pointer-events: auto;
    min-width: 280px;
}

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

.toast-success {
    background: linear-gradient(135deg, var(--success) 0%, #059669 100%);
}

.toast-error {
    background: linear-gradient(135deg, var(--error) 0%, #dc2626 100%);
}

.toast-info {
    background: linear-gradient(135deg, var(--info) 0%, #2563eb 100%);
}

.toast i {
    font-size: var(--text-lg);
}

/* ----------------------------------------
   19. 图片懒加载
   ---------------------------------------- */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

/* 图片骨架屏 */
.image-skeleton {
    background: linear-gradient(
        90deg,
        var(--neutral-100) 0%,
        var(--neutral-200) 50%,
        var(--neutral-100) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ----------------------------------------
   20. 玻璃态效果
   ---------------------------------------- */
.glass-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

@media (prefers-color-scheme: dark) {
    .glass-card {
        background: rgba(30, 41, 59, 0.7);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
}

/* ----------------------------------------
   21. 响应式设计
   ---------------------------------------- */

/* 平板 */
@media (max-width: 1024px) {
    .materials-content {
        grid-template-columns: 1fr;
        gap: var(--space-10);
    }

    .materials-image .image-placeholder {
        height: 300px;
    }

    .hero-stats {
        gap: var(--space-6);
    }
}

/* 手机横屏 */
@media (max-width: 768px) {
    .header {
        transition: transform 0.3s var(--ease-smooth);
    }

    .nav-menu {
        position: fixed;
        inset: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 100px var(--space-8) var(--space-8);
        gap: var(--space-2);
        transform: translateX(100%);
        opacity: 0;
        transition: transform 0.4s var(--ease-smooth), opacity 0.4s ease;
        align-items: stretch;
        justify-content: flex-start;
    }

    .nav-menu.active {
        transform: translateX(0);
        opacity: 1;
    }

    .nav-menu a {
        font-size: var(--text-xl);
        padding: var(--space-4) 0;
        border-bottom: 1px solid var(--neutral-200);
        text-align: center;
    }

    .nav-menu a::after {
        display: none;
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: transparent;
        padding-left: var(--space-5);
        border: none;
        display: none;
    }

    .dropdown.active .dropdown-menu {
        display: block;
    }

    .hamburger {
        display: flex;
    }

    .hero-buttons {
        flex-direction: column;
        gap: var(--space-4);
    }

    .features-grid,
    .solutions-grid,
    .industries-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }

    .form-grid {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .badges-grid {
        gap: var(--space-8);
    }

    .stat-number {
        font-size: var(--text-3xl);
    }

    .toast-container {
        left: var(--space-4);
        right: var(--space-4);
    }

    .toast {
        min-width: auto;
    }
}

/* 手机竖屏 */
@media (max-width: 480px) {
    .hero-title {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }

    .hero-subtitle {
        font-size: var(--text-base);
    }

    .section-header h2 {
        font-size: var(--text-2xl);
    }

    .cta-content h2 {
        font-size: var(--text-2xl);
    }

    .cta-form {
        padding: var(--space-5);
    }

    .cta-buttons {
        flex-direction: column;
        gap: var(--space-4);
        width: 100%;
    }

    .cta-buttons .btn-primary,
    .cta-buttons .btn-outline {
        width: 100%;
    }

    .hero-stats {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-5);
    }

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

/* ----------------------------------------
   22. 触控设备优化
   ---------------------------------------- */
@media (pointer: coarse) {
    .btn-primary,
    .btn-secondary,
    .nav-menu a,
    .hamburger {
        min-height: 44px;
        min-width: 44px;
    }

    .form-group input,
    .form-group select {
        font-size: 16px;
        padding: var(--space-4);
    }
}

/* 禁用悬停效果在触控设备 */
@media (hover: none) {
    .feature-card:hover,
    .product-card:hover,
    .solution-card:hover,
    .case-card:hover {
        transform: none;
    }

    .feature-card:active,
    .product-card:active,
    .solution-card:active,
    .case-card:active {
        transform: scale(0.98);
    }
}

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

    html {
        scroll-behavior: auto;
    }
}

/* ----------------------------------------
   24. 产品滑块（旧版兼容）
   ---------------------------------------- */
.products-slider {
    display: flex;
    gap: var(--space-8);
    overflow-x: auto;
    padding: var(--space-5) 0;
    margin-bottom: var(--space-10);
    scrollbar-width: thin;
    scrollbar-color: var(--neutral-400) var(--neutral-200);
}

.products-slider::-webkit-scrollbar {
    height: 6px;
}

.products-slider::-webkit-scrollbar-track {
    background: var(--neutral-200);
    border-radius: 3px;
}

.products-slider::-webkit-scrollbar-thumb {
    background: var(--neutral-400);
    border-radius: 3px;
}

.product-item {
    flex: 0 0 200px;
    background: white;
    padding: var(--space-8);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.product-item:hover {
    transform: translateY(-5px);
}

.product-image-preview {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: 0 auto var(--space-5);
    background-color: var(--neutral-100);
}

.product-image-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-item:hover .product-image-preview img {
    transform: scale(1.1);
}

.product-item h3 {
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
    color: var(--neutral-900);
}

.product-item p {
    color: var(--neutral-500);
    font-size: var(--text-sm);
}

/* ----------------------------------------
   25. 渐变文字效果
   ---------------------------------------- */
.gradient-text {
    background: linear-gradient(135deg, var(--brand-500), var(--brand-300));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ----------------------------------------
   26. Focus可见性
   ---------------------------------------- */
:focus-visible {
    outline: 2px solid var(--brand-500);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--brand-500);
    outline-offset: 2px;
}

/* ----------------------------------------
   27. 打印样式
   ---------------------------------------- */
@media print {
    .header,
    .hamburger,
    .hero-buttons,
    .cta-section,
    .footer,
    .toast-container {
        display: none !important;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }

    .hero {
        min-height: auto;
        padding: 2rem 0;
        margin-top: 0;
    }

    .feature-card,
    .product-card,
    .case-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
}