/* ========================================
   小刘工作室 - 企业官网 全局样式
   UI设计规范 v3 · 现代简约大气风格
   ======================================== */

/* ---------- CSS 自定义属性 (Design Tokens) ---------- */
:root {
    /* 主色系 - 鲜明蓝紫渐变 */
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --primary-light: #818CF8;
    --primary-dark: #3730A3;
    --primary-glow: rgba(79, 70, 229, 0.15);
    --primary-gradient: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #EC4899 100%);
    --primary-gradient-soft: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(124, 58, 237, 0.08) 50%, rgba(236, 72, 153, 0.06) 100%);

    /* 辅助色 */
    --secondary: #EEF2FF;
    --secondary-foreground: #1E1B4B;

    /* 中性色 - 深色文字 */
    --background: #FAFBFF;
    --foreground: #0F172A;
    --card: #FFFFFF;
    --card-foreground: #1E293B;
    --border: #E2E8F0;
    --ring: var(--primary);

    /* 文字层级 */
    --muted: #F1F5F9;
    --muted-foreground: #64748B;

    /* 功能色 */
    --success: #10B981;
    --destructive: #EF4444;
    --warning: #F59E0B;

    /* 间距 */
    --spacing-section: 6rem;

    /* 圆角 */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* 阴影系统 - 现代层次感 */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04), 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 10px 30px -5px rgba(79, 70, 229, 0.12), 0 4px 10px -4px rgba(79, 70, 229, 0.08);
    --shadow-xl: 0 20px 50px -8px rgba(79, 70, 229, 0.18), 0 8px 20px -6px rgba(124, 58, 237, 0.1);
    --shadow-glow: 0 0 80px -20px rgba(79, 70, 229, 0.35);
    --shadow-card-hover: 0 16px 40px -8px rgba(79, 70, 229, 0.16), 0 6px 16px -4px rgba(124, 58, 237, 0.1);

    /* 过渡 - 精确控制 */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* 容器 */
    --container-max: 1200px;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.65;
    color: var(--foreground);
    background-color: var(--background);
    overflow-x: hidden;
}

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

ul {
    list-style: none;
}

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

/* ---------- Container ---------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.75rem;
}

/* ========== Header / Navigation - 毛玻璃增强 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(24px) saturate(200%);
    -webkit-backdrop-filter: blur(24px) saturate(200%);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.88);
    box-shadow: 0 1px 30px rgba(15, 23, 42, 0.08), 0 0 1px rgba(15, 23, 42, 0.1);
    border-bottom-color: rgba(226, 232, 240, 0.7);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4.25rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 1.1875rem;
    font-weight: 700;
    color: var(--foreground);
    transition: opacity var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.85;
}

.logo-icon {
    color: var(--primary);
    flex-shrink: 0;
    filter: drop-shadow(0 2px 4px rgba(79, 70, 229, 0.2));
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.125rem;
}

.nav-link {
    padding: 0.5rem 1.125rem;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--muted-foreground);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--foreground);
    background: rgba(99, 102, 241, 0.06);
}

.nav-link.active {
    color: var(--primary);
    font-weight: 600;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.06));
}

/* 汉堡菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--foreground);
    border-radius: 2px;
    transition: all var(--transition-spring);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

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

/* ========== Buttons - 现代按钮系统 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5625rem;
    font-weight: 600;
    font-size: 0.9375rem;
    line-height: 1;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--primary-glow), 0 0 0 3px var(--primary);
}

.btn-lg {
    padding: 0.9375rem 2.125rem;
    font-size: 1rem;
    border-radius: var(--radius-xl);
}

/* 主按钮 - 渐变 + 发光阴影 */
.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35), 0 2px 6px rgba(124, 58, 237, 0.2);
    position: relative;
    z-index: 1;
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.18) 0%, transparent 60%);
    border-radius: inherit;
    z-index: -1;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(79, 70, 229, 0.45), 0 4px 12px rgba(124, 58, 237, 0.28);
}

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

/* 轮廓按钮 */
.btn-outline {
    background: transparent;
    color: var(--foreground);
    border: 1.5px solid var(--border);
}

.btn-outline:hover {
    background: var(--card);
    border-color: var(--primary-light);
    color: var(--primary);
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.12);
}

/* 浅色按钮（CTA用） */
.btn-light {
    background: white;
    color: var(--primary);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
}

.btn-light:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* ========== Sections ========== */
.section {
    padding: var(--spacing-section) 0;
    position: relative;
}

.section-alt {
    background: linear-gradient(180deg, var(--secondary) 0%, var(--background) 100%);
}

.section-header {
    text-align: center;
    max-width: 36rem;
    margin: 0 auto 4rem;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.375rem);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.03em;
    margin-bottom: 0.875rem;
    position: relative;
    display: inline-block;
}

/* 标题下方装饰线 */
.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: 4px;
}

.section-desc {
    font-size: 1.09375rem;
    color: var(--muted-foreground);
    line-height: 1.7;
    margin-top: 1rem;
}

/* ========== HERO SECTION - 全新视觉升级 ========== */
.hero {
    position: relative;
    padding: 9rem 0 6rem;
    min-height: auto;
    overflow: hidden;
    background:
        radial-gradient(ellipse 90% 80% at 50% 30%, rgba(99, 102, 241, 0.09) 0%, transparent 70%),
        radial-gradient(ellipse 70% 55% at 85% 70%, rgba(168, 85, 247, 0.07) 0%, transparent 60%),
        radial-gradient(ellipse 50% 40% at 15% 80%, rgba(236, 72, 153, 0.05) 0%, transparent 50%),
        linear-gradient(180deg, #FFFFFF 0%, #FAFBFF 40%, #F5F3FF 100%);
}

/* 精细网格背景 */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(79, 70, 229, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(79, 70, 229, 0.035) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 70% 55% at 50% 33%, black 15%, transparent 72%);
    -webkit-mask-image: radial-gradient(ellipse 70% 55% at 50% 33%, black 15%, transparent 72%);
    pointer-events: none;
}

/* 主浮动光球 - 更大更柔和 */
.hero::after {
    content: '';
    position: absolute;
    top: 10%;
    right: 10%;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(129, 140, 248, 0.18) 0%, rgba(168, 85, 247, 0.08) 40%, transparent 70%);
    border-radius: 50%;
    filter: blur(50px);
    pointer-events: none;
    animation: floatGlow 8s ease-in-out infinite alternate;
}

@keyframes floatGlow {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(-30px, 20px) scale(1.1); }
}

/* 第二个浮动光球 */
.hero-bg {
    position: absolute;
    bottom: 15%;
    left: 8%;
    width: 240px;
    height: 240px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(45px);
    animation: floatGlow2 10s ease-in-out infinite alternate-reverse;
    z-index: 0;
}

@keyframes floatGlow2 {
    from { transform: translate(0, 0); }
    to { translate: translate(25px, -15px); }
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 48rem;
    margin: 0 auto;
    z-index: 1;
}

/* Hero 徽章 - 更精致 */
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.07), rgba(168, 85, 247, 0.05));
    border: 1px solid rgba(99, 102, 241, 0.14);
    border-radius: var(--radius-full);
    margin-bottom: 2rem;
    letter-spacing: 0.01em;
    backdrop-filter: blur(8px);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.125rem);
    font-weight: 900;
    line-height: 1.06;
    letter-spacing: -0.04em;
    margin-bottom: 1.5rem;
}

.hero-title-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 1.175rem;
    line-height: 1.8;
    color: var(--muted-foreground);
    margin-bottom: 3rem;
    max-width: 38rem;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ========== Page Hero (子页面) ========== */
.page-hero {
    padding: 8rem 0 3.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%, rgba(99, 102, 241, 0.08) 0%, transparent 60%),
        linear-gradient(180deg, #FFFFFF 0%, #FDFDFF 100%);
}

.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(79, 70, 229, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(79, 70, 229, 0.025) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: radial-gradient(ellipse 60% 45% at 50% 28%, black 10%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 60% 45% at 50% 28%, black 10%, transparent 70%);
    pointer-events: none;
}

.page-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 0.875rem;
    position: relative;
    z-index: 1;
}

.page-desc {
    font-size: 1.125rem;
    color: var(--muted-foreground);
    position: relative;
    z-index: 1;
}

/* ========== PRODUCTS SECTION - 产品卡片增强 ========== */
.products {
    background: linear-gradient(180deg, #F5F3FF 0%, #FAFBFF 100%);
}

.product-card {
    max-width: 54rem;
    margin: 0 auto;
    background: var(--card);
    border: 1px solid rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-xl);
    padding: 3rem;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

/* 产品卡片顶部渐变条 */
.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-base);
}

/* 卡片内部微光效果 */
.product-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.03) 45%,
        rgba(255, 255, 255, 0.06) 50%,
        rgba(255, 255, 255, 0.03) 55%,
        transparent 100%
    );
    transition: left 0.7s ease;
    pointer-events: none;
}

.product-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-6px);
    border-color: rgba(99, 102, 241, 0.2);
}

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

.product-card:hover::after {
    left: 100%;
}

.product-visual {
    display: flex;
    align-items: flex-start;
    gap: 2.5rem;
}

.product-icon-box {
    flex-shrink: 0;
    width: 5.5rem;
    height: 5.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, rgba(99, 102, 241, 0.12), rgba(168, 85, 247, 0.08));
    border: 1px solid rgba(99, 102, 241, 0.15);
    border-radius: var(--radius-xl);
    color: var(--primary);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.1);
    transition: all var(--transition-base);
}

.product-card:hover .product-icon-box {
    background: linear-gradient(145deg, rgba(99, 102, 241, 0.18), rgba(168, 85, 247, 0.12));
    box-shadow: 0 6px 24px rgba(99, 102, 241, 0.18);
    transform: scale(1.04);
}

.product-info {
    flex: 1;
}

.product-version {
    display: inline-flex;
    align-items: center;
    padding: 0.1875rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 700;
    color: white;
    background: var(--primary-gradient);
    border-radius: var(--radius-full);
    margin-bottom: 0.75rem;
    letter-spacing: 0.03em;
    box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
}

.product-name {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 0.875rem;
    letter-spacing: -0.02em;
    color: var(--foreground);
}

.product-desc {
    font-size: 0.9625rem;
    color: var(--muted-foreground);
    line-height: 1.75;
    margin-bottom: 1.5rem;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.feature-tag {
    padding: 0.375rem 0.9375rem;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--primary);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(124, 58, 237, 0.05));
    border: 1px solid rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.feature-tag:hover {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.13), rgba(124, 58, 237, 0.08));
    border-color: rgba(99, 102, 241, 0.18);
}

/* ========== SERVICES GRID - 服务卡片升级 ========== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
}

.service-item {
    padding: 2.25rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

/* 服务卡片悬停背景渐变 */
.service-item::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-slow);
    z-index: 0;
}

.service-item > * {
    position: relative;
    z-index: 1;
}

.service-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
    border-color: transparent;
}

.service-item:hover::before {
    opacity: 0.03;
}

.service-icon {
    width: 3.5rem;
    height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.08));
    border: 1px solid rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-lg);
    color: var(--primary);
    margin-bottom: 1.25rem;
    transition: all var(--transition-base);
}

.service-item:hover .service-icon {
    background: linear-gradient(145deg, rgba(99, 102, 241, 0.18), rgba(168, 85, 247, 0.12));
    border-color: rgba(99, 102, 241, 0.18);
    box-shadow: 0 0 24px rgba(99, 102, 241, 0.15);
    transform: scale(1.06);
}

.service-title {
    font-size: 1.1875rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
    letter-spacing: -0.01em;
}

.service-desc {
    font-size: 0.95rem;
    color: var(--muted-foreground);
    line-height: 1.68;
}

/* ========== ABOUT PAGE ========== */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4.5rem;
    align-items: center;
}

.about-heading {
    font-size: 1.875rem;
    font-weight: 800;
    margin-bottom: 1.75rem;
    letter-spacing: -0.025em;
    color: var(--foreground);
}

.about-paragraph {
    font-size: 1rem;
    color: var(--muted-foreground);
    line-height: 1.82;
    margin-bottom: 1.125rem;
}

/* 统计数据卡片 */
.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.stat-item {
    text-align: center;
    padding: 2.25rem 1.25rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

/* 底部渐变条 */
.stat-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 3px;
    background: var(--primary-gradient);
    border-radius: 3px 3px 0 0;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.stat-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.18);
}

.stat-item:hover::after {
    opacity: 1;
}

.stat-number {
    display: block;
    font-size: 2.375rem;
    font-weight: 900;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
    margin-bottom: 0.375rem;
}

.stat-label {
    font-size: 0.8875rem;
    color: var(--muted-foreground);
    font-weight: 500;
}

/* ========== ADVANTAGES GRID ========== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.75rem;
}

.advantage-item {
    padding: 2.25rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

/* 左侧装饰条 */
.advantage-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-gradient);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.advantage-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: rgba(99, 102, 241, 0.18);
}

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

.advantage-icon {
    width: 3.5rem;
    height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.08));
    border-radius: var(--radius-lg);
    color: var(--primary);
    margin-bottom: 1.25rem;
    transition: all var(--transition-base);
}

.advantage-item:hover .advantage-icon {
    background: linear-gradient(145deg, rgba(99, 102, 241, 0.18), rgba(168, 85, 247, 0.12));
    box-shadow: 0 0 20px rgba(99, 102, 241, 0.12);
    transform: scale(1.06);
}

.advantage-title {
    font-size: 1.1875rem;
    font-weight: 700;
    margin-bottom: 0.625rem;
}

.advantage-desc {
    font-size: 0.95rem;
    color: var(--muted-foreground);
    line-height: 1.68;
}

/* ========== CONTACT PAGE ========== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3.5rem;
    align-items: flex-start;
}

.contact-heading {
    font-size: 1.625rem;
    font-weight: 800;
    margin-bottom: 0.875rem;
    letter-spacing: -0.015em;
}

.contact-intro {
    font-size: 1rem;
    color: var(--muted-foreground);
    line-height: 1.75;
    margin-bottom: 2.25rem;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1.125rem;
}

/* 联系方式卡片 - 增强版 */
.contact-method-card {
    display: flex;
    align-items: center;
    gap: 1.125rem;
    padding: 1.5rem 1.625rem;
    background: var(--card);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    color: inherit;
    position: relative;
    overflow: hidden;
}

/* 左侧渐变色条 */
.contact-method-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--primary-gradient);
    border-radius: 0 var(--radius-xl) var(--radius-xl) 0;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.contact-method-card:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(99, 102, 241, 0.25);
    transform: translateX(6px);
}

.contact-method-card:hover::before {
    opacity: 1;
}

.contact-method-static {
    cursor: default;
}

.contact-method-static:hover {
    transform: none;
    border-color: var(--border);
    box-shadow: none;
}

.contact-method-static::before {
    display: none;
}

.contact-method-icon {
    width: 3.25rem;
    height: 3.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.08));
    border: 1px solid rgba(99, 102, 241, 0.1);
    border-radius: var(--radius-lg);
    color: var(--primary);
    flex-shrink: 0;
    transition: all var(--transition-base);
}

.contact-method-card:hover .contact-method-icon {
    background: linear-gradient(145deg, rgba(99, 102, 241, 0.16), rgba(168, 85, 247, 0.11));
    border-color: rgba(99, 102, 241, 0.18);
}

.contact-method-text {
    flex: 1;
}

.contact-method-text h3 {
    font-size: 1.03125rem;
    font-weight: 700;
    margin-bottom: 0.1875rem;
}

.contact-method-text p {
    font-size: 0.89375rem;
    color: var(--muted-foreground);
}

.contact-method-arrow {
    color: var(--muted-foreground);
    flex-shrink: 0;
    transition: transform var(--transition-base);
}

.contact-method-card:hover .contact-method-arrow {
    transform: translateX(5px);
    color: var(--primary);
}

/* Contact Form */
.contact-form-wrapper {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2.75rem;
    position: relative;
    overflow: hidden;
}

.contact-form-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.contact-form {
    margin-top: 1.75rem;
}

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

.form-group {
    margin-bottom: 1.125rem;
}

.form-label {
    display: block;
    font-size: 0.89375rem;
    font-weight: 600;
    color: var(--foreground);
    margin-bottom: 0.5625rem;
    letter-spacing: 0.01em;
}

.required {
    color: var(--destructive);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.8125rem 1.125rem;
    font-size: 0.9375rem;
    font-family: inherit;
    color: var(--foreground);
    background: var(--background);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    outline: none;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
    background: white;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: #94A3B8;
}

.form-textarea {
    resize: vertical;
    min-height: 130px;
}

.form-actions {
    margin-top: 0.75rem;
}

.btn-loading {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.spinner {
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.form-feedback {
    margin-top: 1.125rem;
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
}

.form-feedback.success {
    background: rgba(16, 185, 129, 0.08);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.15);
}

.form-feedback.error {
    background: rgba(239, 68, 68, 0.08);
    color: var(--destructive);
    border: 1px solid rgba(239, 68, 68, 0.15);
}

/* ========== CTA SECTION - 行动召唤区 ========== */
.cta {
    padding: 5rem 0;
}

.cta-card {
    text-align: center;
    padding: 4.5rem 2.5rem;
    background: var(--primary-gradient);
    border-radius: var(--radius-xl);
    color: white;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-xl), var(--shadow-glow);
}

/* CTA 内部光晕动画 */
.cta-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 340px;
    height: 340px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(50px);
    animation: ctaFloat 10s ease-in-out infinite alternate;
}

/* CTA 底部反光 */
.cta-card::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -20%;
    width: 280px;
    height: 280px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
    border-radius: 50%;
    filter: blur(40px);
}

@keyframes ctaFloat {
    from { transform: translate(0, 0); }
    to { transform: translate(-50px, 25px); }
}

.cta-title {
    font-size: clamp(1.625rem, 3.5vw, 2.25rem);
    font-weight: 800;
    margin-bottom: 0.875rem;
    letter-spacing: -0.025em;
    position: relative;
    z-index: 1;
}

.cta-desc {
    font-size: 1.09375rem;
    opacity: 0.88;
    margin-bottom: 2.25rem;
    line-height: 1.68;
    position: relative;
    z-index: 1;
}

/* CTA 按钮 - 白底发光 */
.btn-light {
    position: relative;
    z-index: 1;
}

/* ========== FOOTER - 页脚深色渐变 ========== */
.footer {
    background: linear-gradient(180deg, #111827 0%, #0C1222 100%);
    color: #CBD5E1;
    padding: 4rem 0 0;
    position: relative;
    overflow: hidden;
}

/* 顶部渐变发光线 */
.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.4), rgba(168, 85, 247, 0.3), transparent);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1875rem;
    font-weight: 800;
    color: white;
    margin-bottom: 0.875rem;
}

.footer-logo .logo-icon {
    color: var(--primary-light);
}

.footer-logo:hover {
    opacity: 0.9;
}

.footer-desc {
    font-size: 0.90625rem;
    color: #94A3B8;
    line-height: 1.75;
    max-width: 19rem;
}

.footer-heading {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--primary-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 1.25rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.footer-links a {
    font-size: 0.9375rem;
    color: #94A3B8;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.footer-links a:hover {
    color: white;
    transform: translateX(3px);
}

.footer-bottom {
    padding: 1.75rem 0;
    text-align: center;
    font-size: 0.84375rem;
    color: #64748B;
}

/* ========== Scroll Animations - 滚动显示动画 ========== */
.fade-up {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 交错延迟 */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* ========== Responsive Design ========== */
@media (max-width: 1024px) {
    .about-grid {
        gap: 3rem;
        grid-template-columns: 1fr 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2.5rem;
    }

    .hero::after {
        width: 280px;
        height: 280px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-section: 4rem;
    }

    .container {
        padding: 0 1.25rem;
    }

    /* 移动端导航 */
    .nav-toggle {
        display: flex;
        z-index: 101;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.25rem;
        padding: 5.5rem 1.5rem 2rem;
        background: rgba(255, 255, 255, 0.97);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        border-left: 1px solid var(--border);
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-slow);
        z-index: 100;
    }

    .nav-links.active {
        right: 0;
    }

    .nav-link {
        width: 100%;
        padding: 0.8125rem 1.125rem;
        border-radius: var(--radius-md);
    }

    .hero {
        padding: 7rem 0 4rem;
    }

    .hero::after {
        width: 220px;
        height: 220px;
        top: 18%;
        right: 5%;
    }

    .product-visual {
        flex-direction: column;
        gap: 1.5rem;
    }

    .product-icon-box {
        width: 4.5rem;
        height: 4.5rem;
    }

    .product-card {
        padding: 2rem;
    }

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

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

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

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

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

    .contact-form-wrapper {
        padding: 2rem;
    }

    .cta-card {
        padding: 3rem 1.5rem;
    }

    .cta {
        padding: 3.5rem 0;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-desc {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }

    .section-header {
        margin-bottom: 3rem;
    }

    .section-title {
        font-size: 1.625rem;
    }

    .about-stats {
        grid-template-columns: 1fr 1fr;
        gap: 0.875rem;
    }

    .stat-number {
        font-size: 1.75rem;
    }

    .stat-item {
        padding: 1.5rem 0.875rem;
    }
}