/* 基础变量 */
:root {
    --primary: hsl(200, 100%, 65%);
    --primary-dark: hsl(200, 100%, 45%);
    --primary-light: hsl(200, 80%, 92%);
    --text-dark: #0f172a;
    --text-gray: #475569;
    --text-light: #64748b;
    --bg-white: #ffffff;
    --bg-light: #f1f5f9;
    --bg-gray: #e2e8f0;
    --border: #cbd5e1;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.18);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
    /* 案例卡片统一间距 */
    --case-header-padding-bottom: 14px;
    --case-header-margin-bottom: 16px;
    --case-header-height: 68px;
    --case-back-padding: 14px 24px;
    --case-back-header-margin-bottom: 6px;
    --case-back-header-padding-bottom: 6px;
    --case-card-padding: 16px;
    --case-card-gap: 16px;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--bg-white);
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    font-size: 18px;
}

.logo img {
    height: 40px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-gray);
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

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

.nav-cta {
    background: var(--primary);
    color: var(--text-dark);
    padding: 10px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: var(--transition);
}

.nav-cta:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Hero区 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 140px 24px 100px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--bg-white) 50%, var(--primary-light) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
    opacity: 0.15;
    border-radius: 50%;
    animation: pulse-bg 8s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-dark) 0%, transparent 70%);
    opacity: 0.1;
    border-radius: 50%;
    animation: pulse-bg 10s ease-in-out infinite reverse;
}

.hero-content {
    max-width: 800px;
    text-align: center;
    z-index: 1;
    padding: 40px 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-white);
    padding: 10px 20px;
    border-radius: 24px;
    font-size: 14px;
    color: var(--primary-dark);
    font-weight: 500;
    margin-bottom: 32px;
    box-shadow: var(--shadow-sm);
    animation: fadeInUp 0.8s ease;
}

.bilibili-icon {
    flex-shrink: 0;
    animation: blink-icon 2s ease-in-out infinite;
}

.hero-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: blink 2s ease-in-out infinite;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 28px;
    color: var(--text-dark);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
}

.cursor {
    animation: cursor-blink 0.6s step-end infinite;
    color: var(--primary);
    font-weight: 400;
    font-size: 64px;
}

@keyframes cursor-blink {
    50% { opacity: 0; }
}

/* hero-subtitle 已移除 */

.hero-desc {
    font-size: 18px;
    color: var(--text-gray);
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.4s backwards;
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.highlight {
    color: var(--primary);
    font-weight: 700;
}

/* hero-highlight 已移除 */

/* hero-stats 已移除 */

.hero-stat-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 4px;
}

.hero-stat-label {
    font-size: 12px;
    color: var(--text-gray);
    white-space: nowrap;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    animation: fadeInUp 0.8s ease 0.6s backwards;
}

.btn-primary {
    background: var(--primary);
    color: var(--text-dark);
    padding: 16px 36px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition);
}

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

.btn-secondary {
    background: transparent;
    color: var(--text-dark);
    padding: 16px 36px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    border: 2px solid var(--border);
    transition: var(--transition);
}

.btn-secondary:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

/* Hero视觉元素已移除 */

/* AI能力区 */
.ai-section {
    padding: 80px 24px;
    background: var(--bg-white);
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 18px;
    text-align: center;
    color: var(--text-gray);
    margin-bottom: 40px;
}

.ai-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.ai-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    position: relative;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
}

.ai-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.ai-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
}

.ai-card.featured {
    border-color: var(--primary);
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--bg-white) 100%);
}

.ai-card-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary);
    color: var(--text-dark);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.ai-card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--bg-white) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.ai-card-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--primary-dark);
    stroke-width: 1.5;
}

.ai-card.featured .ai-card-icon {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.ai-card.featured .ai-card-icon svg {
    stroke: white;
}

.ai-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.ai-card-desc {
    color: var(--text-gray);
    margin-bottom: 16px;
}

.ai-features {
    list-style: none;
    margin-bottom: 20px;
}

.ai-features li {
    padding: 5px 0;
    color: var(--text-gray);
    font-size: 14px;
    position: relative;
    padding-left: 20px;
}

.ai-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-dark);
    font-weight: 600;
}

.ai-metric {
    background: var(--bg-light);
    padding: 14px;
    border-radius: var(--radius);
    text-align: center;
}

.metric-value {
    display: block;
    font-size: 26px;
    font-weight: 700;
    color: var(--primary-dark);
}

.metric-label {
    font-size: 14px;
    color: var(--text-gray);
}

/* AI+花火核心优势 */
.huohuo-section {
    padding: 120px 24px;
    background: var(--bg-light);
}

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

.huohuo-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 44px 32px;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
}

.huohuo-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.huohuo-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.huohuo-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.huohuo-icon svg {
    width: 32px;
    height: 32px;
    stroke: #fff;
    stroke-width: 1.5;
}

.huohuo-card:nth-child(1) .huohuo-icon {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

.huohuo-card:nth-child(2) .huohuo-icon {
    background: linear-gradient(135deg, #10b981 0%, #047857 100%);
}

.huohuo-card:nth-child(3) .huohuo-icon {
    background: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 100%);
}

.huohuo-card:nth-child(4) .huohuo-icon {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.huohuo-card:nth-child(1):hover {
    border-color: #3b82f6;
}

.huohuo-card:nth-child(2):hover {
    border-color: #10b981;
}

.huohuo-card:nth-child(3):hover {
    border-color: #8b5cf6;
}

.huohuo-card:nth-child(4):hover {
    border-color: #f59e0b;
}

.huohuo-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.huohuo-card p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-gray);
}

/* AI+起飞核心优势 */
.qifei-section {
    padding: 120px 24px;
    background: var(--bg-white);
}

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

.qifei-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 0;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    opacity: 0;
    transform: translateY(30px);
    overflow: hidden;
}

.qifei-card.animate {
    opacity: 1;
    transform: translateY(0);
}

.qifei-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.qifei-card-header {
    padding: 32px 32px 20px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--bg-white) 100%);
    border-bottom: 1px solid var(--border);
}

.qifei-icon {
    width: 56px;
    height: 56px;
    background: var(--bg-white);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.qifei-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--primary-dark);
    stroke-width: 1.5;
}

.qifei-card-content {
    padding: 24px 32px 32px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.qifei-card:nth-child(1) .qifei-icon {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
}

.qifei-card:nth-child(1) .qifei-icon svg {
    stroke: #1d4ed8;
}

.qifei-card:nth-child(2) .qifei-icon {
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
}

.qifei-card:nth-child(2) .qifei-icon svg {
    stroke: #047857;
}

.qifei-card:nth-child(3) .qifei-icon {
    background: linear-gradient(135deg, #f5f3ff 0%, #ede9fe 100%);
}

.qifei-card:nth-child(3) .qifei-icon svg {
    stroke: #6d28d9;
}

.qifei-card:nth-child(4) .qifei-icon {
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
}

.qifei-card:nth-child(4) .qifei-icon svg {
    stroke: #d97706;
}

.qifei-card:nth-child(1):hover {
    border-color: #3b82f6;
}

.qifei-card:nth-child(2):hover {
    border-color: #10b981;
}

.qifei-card:nth-child(3):hover {
    border-color: #8b5cf6;
}

.qifei-card:nth-child(4):hover {
    border-color: #f59e0b;
}

.qifei-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    margin-top: 16px;
}

.qifei-card p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-gray);
    flex: 1;
}

.qifei-metric {
    background: var(--bg-light);
    padding: 16px 20px;
    border-radius: var(--radius);
    text-align: center;
    width: 100%;
    margin-top: 20px;
}

.qifei-metric-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-dark);
}

.qifei-metric-label {
    font-size: 13px;
    color: var(--text-gray);
}

/* 案例区 */
.case-section {
    padding: 120px 24px;
    background: var(--bg-light);
}

.case-section .container {
    max-width: 1200px;
}

.case-carousel {
    position: relative;
    overflow: hidden;
}

.case-track {
    display: flex;
    padding: 40px 0;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-slide {
    flex: 0 0 100%;
    padding: 0 72px;
}

.case-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border: none;
    border-radius: 50%;
    background: var(--bg-white);
    color: var(--primary);
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    z-index: 10;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-nav:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-50%) scale(1.1);
}

.case-prev {
    left: 12px;
}

.case-next {
    right: 12px;
}

.case-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
}

.case-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
    cursor: pointer;
    transition: var(--transition);
}

.case-dot.active {
    background: var(--primary);
    width: 24px;
    border-radius: 10px;
}

.case-dot:hover {
    background: var(--primary-light);
}

.rank-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    background: var(--bg-light);
    color: var(--text-light);
    font-size: 14px;
    border-radius: var(--radius-sm);
    border: 2px dashed var(--border);
}

.case-flip-container {
    perspective: 2000px;
    position: relative;
}

.case-flip-container .flip-btn {
    position: absolute;
    top: 52px;
    right: 48px;
    z-index: 10;
}

.case-flip-inner {
    position: relative;
    display: grid;
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.case-flip-inner.flipped {
    transform: rotateY(180deg);
}

.case-front,
.case-back {
    grid-area: 1 / 1;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    height: 100%;
}

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

.case-back {
    transform: rotateY(180deg);
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 37px 24px 14px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
}

.flip-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.flip-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.35);
}

.back-header {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    height: var(--case-header-height);
    margin-bottom: var(--case-back-header-margin-bottom);
    padding-bottom: var(--case-back-header-padding-bottom);
    border-bottom: 1px solid var(--border);
}

.back-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
}

.back-subtitle {
    font-size: 13px;
    color: var(--text-gray);
    margin-top: 4px;
}

.back-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--case-card-gap);
    flex: 1;
    align-content: center;
}

.rank-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    padding: var(--case-card-padding);
    box-shadow: var(--shadow-md);
    align-self: center;
}

.rank-card-image {
    padding: 16px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-white);
}

.rank-card-image img {
    max-width: 65%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--radius);
}

.rank-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.rank-image {
    overflow: hidden;
    border-radius: var(--radius-sm);
    background: var(--bg-light);
    height: 300px;
}

.rank-image img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

.rank-stats {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.rank-stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}

.rank-stat-item:last-child {
    border-bottom: none;
}

.rank-stat-label {
    font-size: 14px;
    color: var(--text-gray);
}

.rank-stat-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
}

.rank-stat-value.highlight {
    color: var(--primary-dark);
    font-size: 24px;
}

.case-showcase {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 40px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

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

.brand-name {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
}

.brand-logo {
    display: block;
    height: 44px;
    width: auto;
    object-fit: contain;
    margin-bottom: 8px;
}

.brand-logo-wide {
    height: 16px;
    width: auto;
    margin-bottom: 6px;
}

.case-brand {
    text-align: left;
}

.brand-category {
    color: var(--text-gray);
    font-size: 14px;
}

.case-period {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 500;
    font-size: 14px;
}

.case-achievement {
    text-align: center;
    margin-bottom: 24px;
}

.achievement-badge {
    display: inline-block;
    background: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    color: #fff;
    padding: 10px 24px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 12px;
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.3);
}

.achievement-text {
    font-size: 16px;
    color: var(--text-gray);
}

.achievement-text strong {
    color: var(--primary-dark);
}

.case-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 28px;
}

.metric-card {
    background: var(--bg-light);
    padding: 24px 18px;
    border-radius: var(--radius);
    text-align: center;
    transition: var(--transition);
}

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

.metric-card.highlight {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.metric-card.highlight .metric-number,
.metric-card.highlight .metric-name,
.metric-card.highlight .compare-better,
.metric-card.highlight .compare-detail {
    color: #fff;
}

.metric-number {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.metric-number .unit {
    font-size: 20px;
    font-weight: 500;
}

.metric-name {
    font-size: 14px;
    color: var(--text-gray);
    margin-bottom: 8px;
}

.metric-compare {
    font-size: 12px;
}

.compare-better {
    display: block;
    color: #10b981;
    font-weight: 600;
    margin-bottom: 4px;
}

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

.case-conclusion {
    text-align: center;
    padding: 16px;
    background: var(--bg-light);
    border-radius: var(--radius);
}

.case-conclusion p {
    color: var(--text-gray);
    font-size: 16px;
}

.case-conclusion strong {
    color: var(--primary-dark);
}

/* 关于我们 */
.about-section {
    padding: 120px 24px;
    background: var(--bg-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-text h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--text-dark);
}

.about-text p {
    color: var(--text-gray);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-stats {
    display: flex;
    gap: 48px;
    margin-top: 40px;
}

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-dark);
}

.stat-label {
    font-size: 14px;
    color: var(--text-gray);
}

.about-visual {
    display: grid;
    gap: 24px;
}

.visual-card {
    background: var(--bg-white);
    padding: 32px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    gap: 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.visual-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(8px);
}

.visual-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--bg-white) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.visual-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--primary-dark);
    stroke-width: 1.5;
}

.visual-card:hover .visual-icon {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.visual-card:hover .visual-icon svg {
    stroke: white;
}

.visual-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.visual-content p {
    color: var(--text-gray);
    font-size: 14px;
    line-height: 1.6;
}

/* CTA区 */
.cta-section {
    padding: 100px 24px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    text-align: center;
}

.cta-section h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.cta-section p {
    color: var(--text-dark);
    opacity: 0.8;
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.cta-section .btn-primary {
    background: var(--text-dark);
    color: white;
}

.cta-section .btn-primary:hover {
    background: #0f0f1a;
}

.cta-section .btn-secondary {
    border-color: var(--text-dark);
    color: var(--text-dark);
}

.cta-section .btn-secondary:hover {
    background: rgba(0, 0, 0, 0.1);
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 64px 24px 32px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 48px;
}

.footer-brand img {
    height: 40px;
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-light);
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 80px;
}

.footer-column h5 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

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

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-light);
    font-size: 14px;
}

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

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

@keyframes pulse-bg {
    0%, 100% {
        transform: scale(1);
        opacity: 0.15;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.2;
    }
}

@keyframes blink-icon {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(0.95);
    }
}

@keyframes rotate {
    from {
        transform: translate(-50%, -50%) rotate(0deg);
    }
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* 响应式 */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 140px;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-buttons {
        justify-content: center;
    }

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

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

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

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

    .back-content {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 48px;
    }

    .footer-links {
        gap: 48px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-title .cursor {
        font-size: 40px;
    }

    .section-title {
        font-size: 32px;
    }

    .case-metrics {
        grid-template-columns: 1fr;
    }

    .case-slide {
        padding: 0 12px;
    }

    .case-nav {
        width: 36px;
        height: 36px;
        font-size: 20px;
    }

    .case-prev {
        left: 4px;
    }

    .case-next {
        right: 4px;
    }

    .case-showcase {
        padding: 24px;
    }

    .case-back {
        padding: 24px;
    }

    .case-flip-container .flip-btn {
        top: 28px;
        right: 24px;
        padding: 8px 16px;
        font-size: 13px;
    }

    .back-header h3 {
        font-size: 22px;
    }

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

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

    .about-stats {
        flex-direction: column;
        gap: 24px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 8px;
    }
}