/* ============================================
   弘道科技 - 现代化样式系统 v2.0
   Modern Style Sheet for HongDao Tech Website
   ============================================ */

/* ---- CSS 变量系统 (设计令牌) ---- */
:root {
    /* 品牌色 */
    --color-primary: #00A2C1;
    --color-primary-dark: #0088A5;
    --color-primary-light: #00D4FF;
    --color-secondary: #6366F1;
    --color-accent: #0FD4C4;
    --color-purple: #8B5CF6;

    /* 中性色 */
    --color-dark: #0A0E1A;
    --color-dark-2: #141B2D;
    --color-text: #0F172A;
    --color-text-secondary: #475569;
    --color-text-light: #94A3B8;
    --color-bg: #F8FAFC;
    --color-bg-alt: #FFFFFF;
    --color-border: #E2E8F0;
    --color-border-light: #F1F5F9;
    --color-white: #FFFFFF;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #00A2C1 0%, #0FD4C4 100%);
    --gradient-secondary: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
    --gradient-mix: linear-gradient(135deg, #00A2C1 0%, #6366F1 50%, #8B5CF6 100%);
    --gradient-dark: linear-gradient(135deg, #0A0E1A 0%, #1a1f3a 100%);
    --gradient-hero: linear-gradient(135deg, #0A0E1A 0%, #1a1f3a 50%, #0e2a3a 100%);
    --gradient-mesh: radial-gradient(at 27% 37%, hsla(195, 100%, 50%, 0.3) 0px, transparent 50%),
                     radial-gradient(at 97% 21%, hsla(170, 100%, 45%, 0.25) 0px, transparent 50%),
                     radial-gradient(at 52% 99%, hsla(245, 95%, 65%, 0.25) 0px, transparent 50%),
                     radial-gradient(at 10% 29%, hsla(256, 96%, 67%, 0.2) 0px, transparent 50%),
                     radial-gradient(at 97% 96%, hsla(38, 95%, 60%, 0.1) 0px, transparent 50%);

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08), 0 2px 6px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 20px 48px rgba(15, 23, 42, 0.12), 0 4px 12px rgba(15, 23, 42, 0.06);
    --shadow-xl: 0 32px 64px rgba(15, 23, 42, 0.16), 0 8px 16px rgba(15, 23, 42, 0.08);
    --shadow-primary: 0 8px 24px rgba(0, 162, 193, 0.25);
    --shadow-primary-lg: 0 16px 40px rgba(0, 162, 193, 0.35);
    --shadow-glow: 0 0 60px rgba(0, 212, 196, 0.4);

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 999px;

    /* 字体 */
    --font-display: "Space Grotesk", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --font-body: "Inter", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "SF Mono", "Cascadia Code", monospace;

    /* 过渡 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

    /* 间距 */
    --container-max: 1200px;
    --section-padding: 120px 0;
    --nav-height: 76px;
}

/* ---- 基础重置 ---- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    text-rendering: optimizeLegibility;
    font-feature-settings: "cv02", "cv03", "cv04", "cv11", "ss01";
    font-optical-sizing: auto;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

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

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
}

/* 文本选中 */
::selection {
    background: rgba(0, 162, 193, 0.2);
    color: var(--color-dark);
}

/* ---- 字体系统 ---- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.02em;
    text-wrap: balance;
}

/* 数字/标签使用等宽字体增强科技感 */
.stat-number, .process-number {
    font-family: var(--font-display);
    font-variant-numeric: tabular-nums;
}

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

/* ============================================
   导航栏 - 玻璃态悬浮效果
   ============================================ */
.header {
    position: fixed;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 24px);
    max-width: 1200px;
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
    transition: var(--transition);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.88);
    box-shadow: 0 8px 32px rgba(15, 23, 42, 0.1);
    border-color: rgba(255, 255, 255, 0.8);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 28px;
}

.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo img,
.logo svg {
    height: 40px;
    width: auto;
    transition: var(--transition);
}

.logo:hover img,
.logo:hover svg {
    transform: scale(1.03);
}

/* 桌面端导航 */
.top-nav ul {
    display: flex;
    align-items: center;
    gap: 4px;
}

.top-nav ul li a {
    color: var(--color-text-secondary);
    display: block;
    padding: 8px 18px;
    font-size: 0.95rem;
    font-weight: 500;
    font-family: var(--font-body);
    border-radius: var(--radius-full);
    transition: var(--transition);
    position: relative;
    letter-spacing: -0.01em;
}

.top-nav ul li a:hover,
.top-nav ul li.active a {
    color: var(--color-primary);
    background: rgba(0, 162, 193, 0.08);
}

.top-nav ul li.lang-switch {
    margin-left: 8px;
}

.top-nav ul li.lang-switch a {
    color: var(--color-text);
    font-weight: 600;
    border: 1.5px solid var(--color-border);
    padding: 6px 16px;
    border-radius: var(--radius-full);
}

.top-nav ul li.lang-switch a:hover {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* 移动端汉堡菜单 */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1001;
    padding: 0;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
    margin: 0 auto;
}

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

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

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

/* 移动端菜单展开 */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 90px;
    left: 12px;
    right: 12px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 16px;
    z-index: 999;
    opacity: 0;
    transform: translateY(-20px);
    pointer-events: none;
    transition: var(--transition);
}

.mobile-menu-overlay.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.mobile-menu-overlay ul {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mobile-menu-overlay ul li a {
    display: block;
    padding: 12px 16px;
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.mobile-menu-overlay ul li a:hover {
    background: rgba(0, 162, 193, 0.08);
    color: var(--color-primary);
}

.mobile-menu-overlay ul li.lang-switch {
    margin-top: 8px;
    border-top: 1px solid var(--color-border);
    padding-top: 8px;
}

.mobile-menu-overlay ul li.lang-switch a {
    color: var(--color-primary);
    font-weight: 600;
    text-align: center;
    border: 1.5px solid var(--color-primary);
}

/* ============================================
   Hero 区域 - 动态渐变 + 浮动光斑
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--gradient-hero);
    isolation: isolate;
}

/* 动态网格背景 */
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    z-index: 0;
}

/* 动态渐变光斑 */
.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

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

.hero-orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #00A2C1 0%, transparent 70%);
    top: -10%;
    left: -10%;
    animation-delay: 0s;
}

.hero-orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #0FD4C4 0%, transparent 70%);
    top: 50%;
    right: -5%;
    animation-delay: -7s;
}

.hero-orb-3 {
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, #6366F1 0%, transparent 70%);
    bottom: -15%;
    left: 30%;
    animation-delay: -14s;
}

@keyframes orbFloat {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(50px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-30px, 40px) scale(0.95);
    }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--color-white);
    padding: 140px 24px 100px;
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: var(--font-body);
    margin-bottom: 28px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    letter-spacing: 0.01em;
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.85); }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.03em;
}

.hero-title .gradient-text {
    background: linear-gradient(135deg, #00D4FF 0%, #0FD4C4 50%, #6366F1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradientShift 6s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-subtitle {
    font-size: 1.2rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 40px;
    font-weight: 400;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 15px 32px;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-body);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-bounce);
    border: none;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    letter-spacing: -0.01em;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-primary-lg);
    color: var(--color-white);
}

.btn-primary::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0FD4C4 0%, #00A2C1 100%);
    opacity: 0;
    transition: var(--transition);
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-primary span,
.btn-primary svg {
    position: relative;
    z-index: 1;
}

.btn-outline {
    background: rgba(255, 255, 255, 0.08);
    color: var(--color-white);
    border: 1.5px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.18);
    border-color: rgba(255, 255, 255, 0.45);
    color: var(--color-white);
    transform: translateY(-3px);
}

/* 滚动指示器 */
.scroll-indicator {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.8rem;
    text-align: center;
    animation: bounce 2s infinite;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.scroll-indicator svg {
    display: block;
    margin: 0 auto;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ============================================
   通用 Section 标题
   ============================================ */
.section {
    padding: var(--section-padding);
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(0, 162, 193, 0.1), rgba(99, 102, 241, 0.08));
    color: var(--color-primary);
    font-size: 0.825rem;
    font-weight: 600;
    font-family: var(--font-display);
    border-radius: var(--radius-full);
    margin-bottom: 18px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 1px solid rgba(0, 162, 193, 0.15);
}

.section-tag::before {
    content: "";
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 18px;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

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

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 720px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ============================================
   数据展示区 (新增)
   ============================================ */
.stats {
    background: var(--color-bg-alt);
    padding: 80px 0;
    border-top: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.stat-item {
    text-align: center;
    padding: 24px 16px;
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: "";
    position: absolute;
    right: 0;
    top: 20%;
    bottom: 20%;
    width: 1px;
    background: var(--color-border);
}

.stat-number {
    font-size: clamp(2.5rem, 4vw, 3.25rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.stat-suffix {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-left: 2px;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-top: 8px;
}

/* ============================================
   关于我们
   ============================================ */
.about {
    background: var(--color-bg-alt);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: "";
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 162, 193, 0.05) 0%, transparent 70%);
    z-index: 0;
}

.about .container {
    position: relative;
    z-index: 1;
}

.about-intro {
    text-align: center;
    max-width: 820px;
    margin: 0 auto 64px;
}

.about-intro h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 18px;
    letter-spacing: -0.02em;
}

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

.about-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.about-card {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: left;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

/* 光晕跟随鼠标效果 */
.about-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(
        400px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        rgba(0, 162, 193, 0.08),
        transparent 40%
    );
    opacity: 0;
    transition: opacity 0.3s;
    z-index: -1;
}

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

.about-card::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: rgba(0, 162, 193, 0.2);
}

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

.about-card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(0, 162, 193, 0.12), rgba(99, 102, 241, 0.12));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    margin-bottom: 20px;
    transition: var(--transition);
}

.about-card:hover .about-card-icon {
    background: var(--gradient-primary);
    color: var(--color-white);
    transform: rotate(-5deg) scale(1.05);
}

.about-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 10px;
}

.about-card h3 span {
    color: var(--color-primary);
}

.about-card p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

/* ============================================
   服务项目
   ============================================ */
.services {
    background: var(--color-bg);
    position: relative;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 56px;
}

/* AI 精选服务卡片 - 渐变边框高亮 */
.service-card--featured {
    border-color: rgba(0, 162, 193, 0.3);
    background: linear-gradient(135deg, rgba(0, 162, 193, 0.05) 0%, rgba(99, 102, 241, 0.05) 100%), var(--color-bg-alt);
}

.service-card--featured .service-icon {
    background: linear-gradient(135deg, rgba(0, 162, 193, 0.18), rgba(99, 102, 241, 0.14));
}

.service-card--featured .service-icon::after {
    opacity: 0.15;
}

.service-card--featured h4 {
    background: linear-gradient(135deg, var(--color-primary), #6366f1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.service-card {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.service-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(
        400px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
        rgba(0, 162, 193, 0.06),
        transparent 40%
    );
    opacity: 0;
    transition: opacity 0.3s;
    z-index: -1;
}

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

.service-card::after {
    content: "";
    position: absolute;
    bottom: -100%;
    left: -100%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    transition: var(--transition-slow);
    z-index: -1;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(0, 162, 193, 0.25);
}

.service-card:hover::after {
    bottom: -30%;
    left: -30%;
}

.service-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(0, 162, 193, 0.12), rgba(99, 102, 241, 0.08));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    margin-bottom: 24px;
    transition: var(--transition-bounce);
    position: relative;
}

.service-icon::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: var(--radius-md);
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.service-card:hover .service-icon {
    color: var(--color-white);
    transform: rotate(-5deg) scale(1.05);
}

.service-card:hover .service-icon::after {
    opacity: 1;
}

.service-card h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 14px;
    letter-spacing: -0.01em;
}

.service-card p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.service-arrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 16px;
    color: var(--color-primary);
    font-size: 0.875rem;
    font-weight: 600;
    opacity: 0;
    transform: translateX(-8px);
    transition: var(--transition);
}

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

/* ============================================
   合作流程 (新增)
   ============================================ */
.process {
    background: var(--color-bg-alt);
    position: relative;
    overflow: hidden;
}

.process::before {
    content: "";
    position: absolute;
    bottom: -150px;
    left: -150px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.05) 0%, transparent 70%);
    z-index: 0;
}

.process .container {
    position: relative;
    z-index: 1;
}

.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 56px;
    position: relative;
}

.process-grid::before {
    content: "";
    position: absolute;
    top: 30px;
    left: 12%;
    right: 12%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-border) 20%, var(--color-border) 80%, transparent);
    z-index: 0;
}

.process-step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.process-number {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: var(--color-bg-alt);
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-primary);
    position: relative;
    transition: var(--transition-bounce);
}

.process-number::after {
    content: "";
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    background: var(--gradient-primary);
    opacity: 0;
    z-index: -1;
    transition: var(--transition);
}

.process-step:hover .process-number {
    color: var(--color-white);
    border-color: transparent;
    transform: scale(1.1);
}

.process-step:hover .process-number::after {
    opacity: 1;
    inset: -3px;
}

.process-step h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 10px;
}

.process-step p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    max-width: 220px;
    margin: 0 auto;
}

/* ============================================
   作品集
   ============================================ */
.portfolio {
    background: var(--color-bg);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.portfolio-filter {
    padding: 10px 24px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}

.portfolio-filter:hover,
.portfolio-filter.active {
    background: var(--gradient-primary);
    color: var(--color-white);
    border-color: transparent;
    box-shadow: var(--shadow-primary);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.portfolio-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 1;
    background: var(--color-bg-alt);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: var(--transition-slow);
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.portfolio-item:hover img {
    transform: scale(1.1);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    padding: 24px;
    background: linear-gradient(to top, rgba(10, 14, 26, 0.95) 0%, rgba(10, 14, 26, 0.5) 50%, transparent 100%);
    color: var(--color-white);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    opacity: 0;
    transition: var(--transition);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-overlay h5 {
    font-size: 1.125rem;
    font-weight: 700;
    font-family: var(--font-display);
    margin-bottom: 6px;
    transform: translateY(8px);
    transition: var(--transition);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.portfolio-overlay span {
    font-size: 0.825rem;
    font-family: var(--font-body);
    opacity: 0.85;
    transform: translateY(8px);
    transition: var(--transition);
    transition-delay: 0.05s;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.portfolio-item:hover .portfolio-overlay h5,
.portfolio-item:hover .portfolio-overlay span {
    transform: translateY(0);
}

/* ============================================
   品牌合作 - 无限滚动
   ============================================ */
.brands {
    background: var(--color-dark);
    padding: 64px 0;
    position: relative;
    overflow: hidden;
}

.brands-title {
    text-align: center;
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.4);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 36px;
}

.brands::before,
.brands::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 120px;
    z-index: 2;
    pointer-events: none;
}

.brands::before {
    left: 0;
    background: linear-gradient(90deg, var(--color-dark), transparent);
}

.brands::after {
    right: 0;
    background: linear-gradient(-90deg, var(--color-dark), transparent);
}

.brands-viewport {
    overflow: hidden;
}

.brands-track {
    display: flex;
    align-items: center;
    gap: 72px;
    padding: 8px 0;
    will-change: transform;
}

.brand-logo {
    height: 52px;
    width: auto;
    opacity: 0.75;
    transition: var(--transition);
    flex-shrink: 0;
}

.brand-logo:hover {
    opacity: 1;
    transform: scale(1.06);
}

/* ============================================
   联系我们
   ============================================ */
.contact {
    background: var(--color-bg-alt);
    position: relative;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-top: 56px;
}

/* 联系表单 */
.contact-form {
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 40px;
    box-shadow: var(--shadow-sm);
}

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

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    font-size: 0.9375rem;
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    background: var(--color-bg-alt);
    box-shadow: 0 0 0 4px rgba(0, 162, 193, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-light);
}

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

.form-submit {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 12px;
    gap: 16px;
}

.form-submit .conditions {
    font-size: 0.8125rem;
    color: var(--color-text-light);
}

.form-submit .conditions span {
    color: #EF4444;
}

.btn-submit {
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: 14px 36px;
    border: none;
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-bounce);
    box-shadow: var(--shadow-primary);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-submit:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-primary-lg);
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

#message-result {
    margin-top: 16px;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    display: none;
}

#message-result.success {
    background: #ECFDF5;
    color: #047857;
    display: block;
    border: 1px solid #A7F3D0;
}

#message-result.error {
    background: #FEF2F2;
    color: #B91C1C;
    display: block;
    border: 1px solid #FECACA;
}

/* 联系信息 */
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-map {
    width: 100%;
    height: 350px;
    border: none;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.contact-info-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

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

.contact-detail-item {
    padding: 20px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
    transition: var(--transition);
}

.contact-detail-item:hover {
    transform: translateY(-3px);
    border-color: rgba(0, 162, 193, 0.2);
    box-shadow: var(--shadow-sm);
}

.contact-detail-item .contact-detail-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, rgba(0, 162, 193, 0.12), rgba(99, 102, 241, 0.08));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.contact-detail-item h5 {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 6px;
}

.contact-detail-item span,
.contact-detail-item a {
    font-size: 0.9rem;
    color: var(--color-text);
    display: block;
    line-height: 1.6;
    font-weight: 500;
}

.contact-detail-item a:hover {
    color: var(--color-primary);
}

/* ============================================
   页脚 - 多列布局
   ============================================ */
.footer {
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.65);
    padding: 80px 0 32px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 56px;
}

.footer-brand .footer-logo {
    height: 40px;
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
    max-width: 320px;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--color-white);
    transform: translateY(-3px);
}

.footer-col h5 {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 20px;
    letter-spacing: 0.02em;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--color-primary-light);
    padding-left: 4px;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-copyright {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 0.8125rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.5);
}

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

.footer-links img {
    width: 14px;
    height: 14px;
    vertical-align: middle;
}

/* ============================================
   回到顶部
   ============================================ */
#toTop {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 52px;
    height: 52px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-bounce);
    box-shadow: var(--shadow-primary-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

#toTop.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

#toTop:hover {
    transform: translateY(-4px) scale(1.05);
}

#toTop svg {
    width: 22px;
    height: 22px;
    color: var(--color-white);
}

/* ============================================
   滚动动画
   ============================================ */
.fade-in-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.fade-in-up:nth-child(1) { transition-delay: 0.05s; }
.fade-in-up:nth-child(2) { transition-delay: 0.15s; }
.fade-in-up:nth-child(3) { transition-delay: 0.25s; }
.fade-in-up:nth-child(4) { transition-delay: 0.35s; }
.fade-in-up:nth-child(5) { transition-delay: 0.45s; }
.fade-in-up:nth-child(6) { transition-delay: 0.55s; }

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

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .process-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }

    .process-grid::before {
        display: none;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .hero-title {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
    }

    /* 移动端导航 */
    .top-nav ul {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .mobile-menu-overlay {
        display: block;
    }

    /* Header 移动端适配 */
    .header {
        top: 8px;
        width: calc(100% - 16px);
        border-radius: var(--radius-md);
    }

    .header .container {
        padding: 0 16px;
    }

    /* Hero */
    .hero {
        min-height: 90vh;
    }

    .hero-content {
        padding: 130px 20px 90px;
    }

    .hero-title {
        font-size: 2.4rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
        padding: 0 24px;
    }

    .btn {
        width: 100%;
        max-width: 320px;
        margin: 0 auto;
        justify-content: center;
    }

    /* Section */
    .section-header {
        margin-bottom: 48px;
    }

    .section-title {
        font-size: 1.875rem;
    }

    /* Stats */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .stat-item:not(:last-child)::after {
        display: none;
    }

    .stat-item {
        padding: 16px 8px;
        background: var(--color-bg);
        border-radius: var(--radius-md);
    }

    /* About */
    .about-grid {
        grid-template-columns: 1fr;
    }

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

    /* Process */
    .process-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    /* Portfolio */
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    /* Contact */
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .contact-details {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 28px 20px;
    }

    .form-submit {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
    }

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

    /* Footer */
    .footer {
        padding: 60px 0 24px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

    /* Back to top */
    #toTop {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 1.875rem;
    }

    .hero-subtitle {
        font-size: 0.9375rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

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

    .logo img,
    .logo svg {
        height: 32px;
    }
}

/* ============================================
   工具类
   ============================================ */
.clearfix::after {
    content: "";
    display: table;
    clear: both;
}

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

.hidden {
    display: none !important;
}

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