/* ============================================
   全局重置 & 基础样式
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 品牌主色 - 类似 Shopee 的橙红色调 */
    --primary-color: #ee4d2d;
    --primary-dark: #d73211;
    --primary-light: #ff6633;
    --primary-gradient: linear-gradient(135deg, #ee4d2d 0%, #ff7332 100%);

    /* 辅助色 */
    --secondary-color: #1a1a2e;
    --accent-color: #ffb800;
    --success-color: #00b85a;
    --info-color: #0084ff;

    /* 中性色 */
    --text-primary: #1a1a1a;
    --text-secondary: #555555;
    --text-tertiary: #888888;
    --bg-white: #ffffff;
    --bg-light: #f8f9fb;
    --bg-gray: #f5f5f7;
    --border-color: #e8e8ea;
    --border-light: #f0f0f2;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 50px rgba(238, 77, 45, 0.15);

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 999px;

    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* 容器最大宽度 */
    --container-max: 1280px;
    --header-height: 72px;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
        sans-serif;
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

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

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

ul,
ol {
    list-style: none;
}

/* ============================================
   通用工具类
   ============================================ */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

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

.section-sm {
    padding: 60px 0;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 60px;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

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

/* ============================================
   按钮
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
    border: 2px solid transparent;
    text-decoration: none;
    line-height: 1.2;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #fff;
    box-shadow: 0 6px 20px rgba(238, 77, 45, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(238, 77, 45, 0.4);
    color: #fff;
}

.btn-secondary {
    background: #fff;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

.btn-ghost {
    background: transparent;
    color: var(--text-primary);
    border-color: var(--border-color);
}

.btn-ghost:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-lg {
    padding: 18px 40px;
    font-size: 17px;
}

/* ============================================
   顶部导航栏
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    z-index: 1000;
    transition: all var(--transition-base);
    border-bottom: 1px solid transparent;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
    border-bottom-color: var(--border-light);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    text-decoration: none;
}

.logo-img {
    height: 36px;
    width: auto;
    max-width: 160px;
    display: block;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.logo:hover .logo-img {
    opacity: 0.85;
    transform: scale(1.03);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-link {
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 500;
    position: relative;
    padding: 6px 0;
}

.nav-link::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: all var(--transition-base);
    transform: translateX(-50%);
}

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

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

.lang-switch {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.lang-switch:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--text-primary);
}

/* ============================================
   Hero 区域
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    padding: calc(var(--header-height) + 60px) 0 80px;
    overflow: hidden;
    background: linear-gradient(180deg, #fff5f1 0%, #ffffff 100%);
}

.hero::before {
    content: "";
    position: absolute;
    top: -10%;
    right: -10%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(238, 77, 45, 0.12) 0%, transparent 70%);
    filter: blur(40px);
    z-index: 0;
}

.hero::after {
    content: "";
    position: absolute;
    bottom: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 184, 0, 0.08) 0%, transparent 70%);
    filter: blur(40px);
    z-index: 0;
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(238, 77, 45, 0.1);
    color: var(--primary-color);
    border-radius: var(--radius-full);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid rgba(238, 77, 45, 0.2);
}

.hero-badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.2); }
}

.hero-title {
    font-size: clamp(40px, 5.5vw, 64px);
    font-weight: 800;
    line-height: 1.1;
    color: var(--text-primary);
    letter-spacing: -1.5px;
    margin-bottom: 24px;
}

.hero-title .highlight {
    position: relative;
    display: inline-block;
}

.hero-title .highlight::after {
    content: "";
    position: absolute;
    bottom: 6px;
    left: 0;
    right: 0;
    height: 12px;
    background: rgba(238, 77, 45, 0.2);
    z-index: -1;
    border-radius: 4px;
}

.hero-desc {
    font-size: 19px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 36px;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

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

.hero-stat-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-stat-label {
    font-size: 14px;
    color: var(--text-tertiary);
    margin-top: 6px;
}

/* Hero 视觉 */
.hero-visual {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1;
    max-width: 560px;
    margin: 0 auto;
}

.hero-card {
    position: absolute;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-lg);
    animation: float 6s ease-in-out infinite;
}

.hero-card-1 {
    top: 10%;
    left: 0;
    width: 240px;
    animation-delay: 0s;
}

.hero-card-2 {
    bottom: 15%;
    right: 0;
    width: 260px;
    animation-delay: 1.5s;
}

.hero-card-3 {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 280px;
    animation-delay: 3s;
    background: var(--primary-gradient);
    color: #fff;
    box-shadow: var(--shadow-xl);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.hero-card-3 {
    animation-name: floatCenter;
}

@keyframes floatCenter {
    0%, 100% { transform: translate(-50%, -50%); }
    50% { transform: translate(-50%, calc(-50% - 12px)); }
}

.hero-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(238, 77, 45, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 12px;
    color: var(--primary-color);
}

.hero-card-3 .hero-card-icon {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
}

.hero-card-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

.hero-card-value {
    font-size: 24px;
    font-weight: 800;
    color: var(--primary-color);
}

.hero-card-3 .hero-card-value {
    color: #fff;
}

.hero-card-desc {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.hero-card-3 .hero-card-desc {
    color: rgba(255, 255, 255, 0.85);
}

/* ============================================
   合作伙伴 Logo 区
   ============================================ */
.partners {
    padding: 60px 0;
    background: var(--bg-light);
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

.partners-label {
    text-align: center;
    font-size: 14px;
    color: var(--text-tertiary);
    margin-bottom: 32px;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 40px;
    align-items: center;
}

.partner-logo {
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 18px;
    font-weight: 700;
    opacity: 0.6;
    transition: all var(--transition-base);
    filter: grayscale(1);
}

.partner-logo:hover {
    opacity: 1;
    filter: grayscale(0);
    color: var(--primary-color);
    transform: scale(1.05);
}

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

.service-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

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

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

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(238, 77, 45, 0.1), rgba(255, 115, 50, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin-bottom: 24px;
    color: var(--primary-color);
    transition: all var(--transition-base);
}

.service-card:hover .service-icon {
    background: var(--primary-gradient);
    color: #fff;
    transform: scale(1.1);
}

.service-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.service-desc {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 15px;
    transition: gap var(--transition-fast);
}

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

/* ============================================
   解决方案/特性区
   ============================================ */
.features {
    background: var(--bg-light);
}

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

.feature-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 40px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
    transition: all var(--transition-base);
    border: 1px solid var(--border-light);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(238, 77, 45, 0.2);
}

.feature-number {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    border-radius: 14px;
    background: var(--primary-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 800;
    box-shadow: 0 8px 20px rgba(238, 77, 45, 0.3);
}

.feature-content {
    flex: 1;
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
}

/* ============================================
   数据统计区
   ============================================ */
.stats {
    background: var(--secondary-color);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(238, 77, 45, 0.3) 0%, transparent 70%);
    filter: blur(60px);
}

.stats::after {
    content: "";
    position: absolute;
    bottom: -50%;
    left: -10%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 184, 0, 0.2) 0%, transparent 70%);
    filter: blur(60px);
}

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

.stats .section-title {
    color: #fff;
}

.stats .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin-top: 60px;
}

.stat-item {
    text-align: center;
    padding: 32px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.stat-item:hover {
    transform: translateY(-6px);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(238, 77, 45, 0.3);
}

.stat-icon {
    font-size: 32px;
    margin-bottom: 16px;
    color: var(--primary-color);
}

.stat-num {
    font-size: 48px;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff 0%, #ffb88c 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
}

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

.case-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--border-light);
}

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

.case-image {
    aspect-ratio: 16 / 10;
    background: var(--primary-gradient);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 64px;
    font-weight: 800;
}

.case-image::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.2) 100%);
}

.case-image-1 { background: linear-gradient(135deg, #ee4d2d, #ff7332); }
.case-image-2 { background: linear-gradient(135deg, #0084ff, #00c4ff); }
.case-image-3 { background: linear-gradient(135deg, #6a11cb, #2575fc); }

.case-tag {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 700;
    color: var(--primary-color);
    z-index: 1;
}

.case-body {
    padding: 28px;
}

.case-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
    line-height: 1.4;
}

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

.case-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--border-light);
}

.case-result {
    font-size: 14px;
    color: var(--text-tertiary);
}

.case-result strong {
    color: var(--primary-color);
    font-size: 18px;
    font-weight: 800;
    margin-right: 4px;
}

.case-link {
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
}

/* ============================================
   评价/推荐
   ============================================ */
.testimonials {
    background: var(--bg-light);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.testimonial-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border-light);
    position: relative;
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.testimonial-quote {
    font-size: 64px;
    line-height: 1;
    color: var(--primary-color);
    opacity: 0.2;
    position: absolute;
    top: 16px;
    right: 24px;
    font-family: Georgia, serif;
}

.testimonial-text {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 24px;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 14px;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 700;
    font-size: 18px;
    flex-shrink: 0;
}

.author-info {
    flex: 1;
}

.author-name {
    font-weight: 700;
    font-size: 15px;
    color: var(--text-primary);
}

.author-role {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.testimonial-rating {
    color: var(--accent-color);
    font-size: 14px;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

/* ============================================
   CTA 表单区
   ============================================ */
.cta {
    background: var(--bg-light);
}

.cta-inner {
    background: var(--primary-gradient);
    border-radius: var(--radius-xl);
    padding: 80px 60px;
    color: #fff;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.cta-inner::before {
    content: "";
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.cta-inner::after {
    content: "";
    position: absolute;
    bottom: -150px;
    left: -100px;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
}

.cta-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: 40px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.cta-desc {
    font-size: 18px;
    line-height: 1.7;
    opacity: 0.95;
    margin-bottom: 32px;
}

.cta-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
}

.cta-feature-check {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
    font-weight: 800;
}

/* 表单 */
.cta-form {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px;
    color: var(--text-primary);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
}

.form-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.form-desc {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-label .required {
    color: var(--primary-color);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-family: inherit;
    color: var(--text-primary);
    background: #fff;
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(238, 77, 45, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-submit {
    width: 100%;
    padding: 14px;
    background: var(--primary-gradient);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 6px 20px rgba(238, 77, 45, 0.3);
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(238, 77, 45, 0.4);
}

.form-note {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 12px;
    text-align: center;
}

/* ============================================
   FAQ
   ============================================ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item:hover {
    border-color: rgba(238, 77, 45, 0.2);
}

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

.faq-question {
    width: 100%;
    padding: 22px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    gap: 16px;
}

.faq-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(238, 77, 45, 0.1);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all var(--transition-base);
}

.faq-item.active .faq-icon {
    background: var(--primary-color);
    color: #fff;
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-answer-inner {
    padding: 0 28px 22px;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.8;
}

/* ============================================
   页脚
   ============================================ */
.footer {
    background: var(--secondary-color);
    color: #fff;
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand {
    max-width: 360px;
}

.footer .logo {
    color: #fff;
    margin-bottom: 20px;
}

.footer .logo-img {
    height: 36px;
    width: auto;
    max-width: 160px;
    filter: brightness(0) invert(1);
    transition: opacity 0.25s ease;
}

.footer .logo:hover .logo-img {
    opacity: 0.85;
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 24px;
}

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

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
    color: #fff;
}

.footer-col-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #fff;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    transition: all var(--transition-fast);
}

.footer-link:hover {
    color: var(--primary-color);
    padding-left: 4px;
}

.footer-bottom {
    padding: 24px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

.footer-legal {
    display: flex;
    gap: 24px;
}

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

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

/* ============================================
   滚动到顶部
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
    font-size: 18px;
    font-weight: 700;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .section {
        padding: 80px 0;
    }

    .section-title {
        font-size: 36px;
    }

    .hero-inner {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-visual {
        max-width: 480px;
    }

    .partners-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 28px;
    }

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

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

    .cta-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }

    .footer-brand {
        grid-column: 1 / -1;
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 64px;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 30px;
    }

    .section-subtitle {
        font-size: 16px;
        margin-bottom: 40px;
    }

    .container {
        padding: 0 20px;
    }

    .nav-list {
        display: none;
    }

    .header-actions .btn,
    .header-actions .lang-switch {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        padding: calc(var(--header-height) + 40px) 0 60px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-desc {
        font-size: 16px;
    }

    .hero-stats {
        gap: 24px;
    }

    .hero-stat-num {
        font-size: 26px;
    }

    .hero-card {
        padding: 14px;
    }

    .hero-card-1,
    .hero-card-2,
    .hero-card-3 {
        width: 200px;
    }

    .hero-card-title {
        font-size: 14px;
    }

    .hero-card-value {
        font-size: 18px;
    }

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

    .services-grid,
    .features-grid,
    .cases-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .feature-card {
        padding: 28px;
    }

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

    .stat-num {
        font-size: 36px;
    }

    .cta-inner {
        padding: 50px 24px;
    }

    .cta-title {
        font-size: 28px;
    }

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

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

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
}

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

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

    .hero-stat-num {
        font-size: 22px;
    }

    .hero-stat-label {
        font-size: 12px;
    }

    .logo-img {
        height: 28px;
        max-width: 130px;
    }

    .footer .logo-img {
        height: 28px;
        max-width: 130px;
    }
}

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

.fade-in {
    animation: fadeInUp 0.6s ease-out both;
}

/* 减少动画 (可访问性) */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============================================
   打印样式
   ============================================ */
@media print {
    .header,
    .back-to-top,
    .cta-form,
    .hero-actions {
        display: none;
    }

    body {
        color: #000;
        background: #fff;
    }
}