/* ===== 基础重置与变量 ===== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --accent: #06b6d4;
    --accent-purple: #7c3aed;
    --text: #1f2937;
    --text-secondary: #4b5563;
    --text-light: #9ca3af;
    --bg: #ffffff;
    --bg-gray: #f8fafc;
    --bg-dark: #0f172a;
    --border: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.08);
    --radius: 12px;
    --radius-lg: 20px;
    --max-width: 1200px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--bg);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

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

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(229, 231, 235, 0.5);
    transition: var(--transition);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo img {
    height: 44px;
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-links a {
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 8px;
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.06);
}

.nav-links .nav-cta {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
    color: white;
    margin-left: 8px;
}

.nav-links .nav-cta:hover {
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--accent-purple) 100%);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1.5px solid rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(4px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: white;
}

.btn-full {
    width: 100%;
}

/* ===== 首页大屏 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 100px;
    overflow: hidden;
}

.hero-bg-tech {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #172554 100%);
    overflow: hidden;
}

.tech-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    transform: perspective(500px) rotateX(60deg) translateY(-100px) scale(2);
    transform-origin: top center;
    opacity: 0.6;
}

.tech-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.35;
    animation: float 12s ease-in-out infinite;
}

.tech-orb.orb-1 {
    width: 500px;
    height: 500px;
    background: #3b82f6;
    top: -150px;
    right: -100px;
    animation-delay: 0s;
}

.tech-orb.orb-2 {
    width: 400px;
    height: 400px;
    background: #7c3aed;
    bottom: -100px;
    left: -100px;
    animation-delay: -4s;
}

.tech-orb.orb-3 {
    width: 300px;
    height: 300px;
    background: #06b6d4;
    top: 40%;
    right: 20%;
    animation-delay: -8s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, transparent 0%, rgba(15, 23, 42, 0.4) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-tag {
    display: inline-block;
    padding: 8px 18px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.9);
    font-size: 14px;
    border-radius: 50px;
    margin-bottom: 24px;
    backdrop-filter: blur(8px);
}

.hero-text h1 {
    font-size: 58px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -1px;
    color: white;
}

.gradient-text {
    background: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 36px;
    max-width: 620px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 56px;
}

.hero-stats {
    display: flex;
    gap: 48px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
}

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

.stat-num {
    font-size: 36px;
    font-weight: 800;
    color: white;
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 8px;
}

/* ===== 通用板块 ===== */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 60px;
}

.section-header.light h2,
.section-header.light p {
    color: white;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 38px;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-header p {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 关于我们 ===== */
.about {
    background: var(--bg);
}

.about-main {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.about-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(124, 58, 237, 0.05) 100%);
    pointer-events: none;
}

.about-image img {
    width: 100%;
    height: 520px;
    object-fit: cover;
    display: block;
    filter: saturate(0.95) contrast(1.02);
}

.about-image-badge {
    position: absolute;
    bottom: 24px;
    left: 24px;
    background: white;
    padding: 16px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
}

.about-image-badge span {
    display: block;
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.about-image-badge small {
    font-size: 14px;
    color: var(--text-secondary);
}

.about-content h2 {
    font-size: 34px;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.3;
}

.about-content > p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.about-info-item {
    padding: 16px;
    background: var(--bg-gray);
    border-radius: var(--radius);
}

.about-info-item .info-label {
    display: block;
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 4px;
}

.about-info-item .info-value {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
}

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

.about-card {
    padding: 32px 24px;
    background: var(--bg-gray);
    border-radius: var(--radius);
    transition: var(--transition);
    border: 1px solid transparent;
}

.about-card:hover {
    background: white;
    border-color: var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.about-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.about-icon svg {
    width: 26px;
    height: 26px;
}

.about-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

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

/* ===== 创始团队 ===== */
.team {
    background: var(--bg-gray);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.team-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 36px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: var(--transition);
}

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

.team-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.avatar-1 { background: linear-gradient(135deg, #534AB7 0%, #7c3aed 100%); }
.avatar-2 { background: linear-gradient(135deg, #D85A30 0%, #ea580c 100%); }

.team-info h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 4px;
}

.team-title {
    font-size: 14px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 12px;
}

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

/* ===== 核心产品 ===== */
.product {
    background: var(--bg);
}

.product-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 60px;
    align-items: center;
}

.product-content h2 {
    font-size: 38px;
    font-weight: 800;
    margin-bottom: 16px;
}

.product-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 36px;
}

.product-modules {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 32px;
}

.product-module {
    display: flex;
    gap: 18px;
    padding: 24px;
    background: var(--bg-gray);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.module-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.module-icon svg {
    width: 24px;
    height: 24px;
}

.product-module h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 6px;
}

.product-module p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.product-status {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

.status-item svg {
    width: 18px;
    height: 18px;
    color: #10b981;
    flex-shrink: 0;
}

.product-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.browser-frame {
    background: #1e293b;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.browser-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #334155;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.browser-dots {
    display: flex;
    gap: 6px;
}

.browser-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.browser-dots span:nth-child(1) { background: #ef4444; }
.browser-dots span:nth-child(2) { background: #f59e0b; }
.browser-dots span:nth-child(3) { background: #10b981; }

.browser-address {
    flex: 1;
    text-align: center;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
    background: rgba(0, 0, 0, 0.2);
    padding: 4px 12px;
    border-radius: 6px;
    margin: 0 20px;
}

.browser-content img {
    width: 100%;
    display: block;
}

.browser-content {
    display: flex;
    justify-content: center;
    align-items: center;
    background: #0d1220;
    padding: 28px 0;
}

.app-shot {
    width: auto;
    max-width: 58%;
    max-height: 440px;
    height: auto;
    object-fit: contain;
    border-radius: 14px;
}

.product-image-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: white;
    font-size: 14px;
}

/* ===== 业务线 ===== */
.business {
    background: linear-gradient(135deg, var(--bg-dark) 0%, #1e293b 100%);
    position: relative;
    overflow: hidden;
}

.business::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 20%, rgba(37, 99, 235, 0.15) 0%, transparent 40%),
                radial-gradient(circle at 80% 80%, rgba(124, 58, 237, 0.12) 0%, transparent 40%);
    pointer-events: none;
}

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

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

.business-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: var(--transition);
}

.business-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-8px);
    border-color: rgba(37, 99, 235, 0.4);
}

.business-num {
    font-size: 48px;
    font-weight: 800;
    color: rgba(37, 99, 235, 0.4);
    line-height: 1;
    margin-bottom: 20px;
}

.business-card h3 {
    font-size: 24px;
    font-weight: 700;
    color: white;
    margin-bottom: 8px;
}

.business-subtitle {
    font-size: 15px;
    color: var(--accent);
    margin-bottom: 16px;
    font-weight: 500;
}

.business-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: 20px;
}

.business-card ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.business-card li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.75);
    padding-left: 18px;
    position: relative;
    line-height: 1.5;
}

.business-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
}

/* ===== AI 能力 ===== */
.capabilities {
    background: var(--bg-gray);
}

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

.capability-card {
    background: white;
    border-radius: var(--radius);
    padding: 32px 26px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

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

.capability-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
}

.capability-icon svg {
    width: 26px;
    height: 26px;
}

.capability-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

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

/* ===== 服务客户 ===== */
.clients {
    background: var(--bg);
}

.clients-table-wrapper {
    overflow-x: auto;
    margin-bottom: 60px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.clients-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    font-size: 15px;
}

.clients-table th {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
    color: white;
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
}

.clients-table td {
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    line-height: 1.6;
}

.clients-table tr:last-child td {
    border-bottom: none;
}

.clients-table tr:hover td {
    background: var(--bg-gray);
}

.cooperation-models h3 {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 28px;
}

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

.model-card {
    background: var(--bg-gray);
    border-radius: var(--radius);
    padding: 28px 22px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.model-card:hover {
    background: white;
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.model-card h4 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 10px;
}

.model-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 14px;
}

.model-tag {
    font-size: 12px;
    color: var(--primary);
    background: rgba(37, 99, 235, 0.08);
    padding: 4px 10px;
    border-radius: 50px;
    font-weight: 500;
}

/* ===== 客户案例 ===== */
.cases {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
    position: relative;
    overflow: hidden;
}

.cases::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

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

.cases-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 24px;
    align-items: stretch;
}

.case-card-featured {
    grid-row: span 2;
}

.case-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    padding: 36px 30px;
    color: white;
    min-height: 320px;
    display: flex;
    flex-direction: column;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.case-card-1::before {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
}

.case-card-2::before {
    background: linear-gradient(135deg, #581c87 0%, #7c3aed 100%);
}

.case-card-3::before {
    background: linear-gradient(135deg, #0e7490 0%, #06b6d4 100%);
}

.case-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
    z-index: 1;
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.case-card > * {
    position: relative;
    z-index: 2;
}

.case-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.case-icon svg {
    width: 28px;
    height: 28px;
    stroke: white;
}

.case-card .case-tag {
    display: inline-block;
    width: fit-content;
    margin-bottom: 12px;
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    font-size: 13px;
    font-weight: 600;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.case-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: white;
}

.case-card > p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.7;
    margin-bottom: 24px;
    flex-grow: 1;
}

.case-result {
    margin-top: auto;
}

.case-result span {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 14px;
    font-weight: 700;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.case-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin: 0 0 18px;
}

.case-gallery img {
    width: 100%;
    height: 170px;
    object-fit: cover;
    object-position: center 25%;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.case-gallery img.case-shot-product {
    object-fit: contain;
    object-position: center;
    background: rgba(255, 255, 255, 0.92);
}

/* 桌面端案例图放大，减少卡片内空白（手机端保持 170px） */
@media (min-width: 1025px) {
    .case-gallery img {
        height: 280px;
    }
}

.case-result-row {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: auto;
    margin-bottom: 14px;
}

.case-result-row span {
    display: inline-block;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 13px;
    font-weight: 700;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.case-quote {
    font-size: 14px;
    font-style: italic;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.6;
    padding-left: 16px;
    border-left: 3px solid rgba(255, 255, 255, 0.4);
}

/* ===== 发展历程 ===== */
.milestones {
    background: var(--bg-gray);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--accent-purple));
}

.timeline-item {
    position: relative;
    padding-bottom: 32px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -28px;
    top: 4px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: white;
    border: 3px solid var(--primary);
}

.timeline-item.highlight .timeline-dot {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
    border: none;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15);
}

.timeline-content {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.timeline-time {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 10px;
}

.timeline-content h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

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

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info h2 {
    font-size: 36px;
    font-weight: 800;
    margin: 16px 0 20px;
}

.contact-info > p {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 40px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 40px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 22px;
    height: 22px;
}

.contact-item h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 15px;
    color: var(--text-secondary);
}

.contact-tel {
    font-size: 17px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.contact-tel a {
    color: #111827;
    text-decoration: none;
    border-bottom: 1px solid rgba(37, 99, 235, 0.35);
    transition: color 0.3s ease, border-color 0.3s ease;
}

.contact-tel a:hover {
    color: #2563eb;
    border-color: #2563eb;
}

.contact-sep {
    margin: 0 8px;
    color: #9ca3af;
    font-weight: 400;
}

.contact-note {
    font-size: 13px;
    margin-top: 4px;
    opacity: 0.85;
}

.vision-box {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05) 0%, rgba(124, 58, 237, 0.05) 100%);
    border-radius: var(--radius);
    padding: 28px;
    border: 1px solid rgba(37, 99, 235, 0.1);
}

.vision-box h4 {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 600;
    margin-bottom: 6px;
}

.vision-box h4:not(:first-child) {
    margin-top: 20px;
}

.vision-text {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.vision-box p:last-child {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.contact-form-wrapper {
    background: white;
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-gray);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-tip {
    text-align: center;
    font-size: 13px;
    color: var(--text-light);
    margin-top: -8px;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    height: 48px;
    width: auto;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
    max-width: 300px;
    line-height: 1.7;
    margin-bottom: 12px;
}

.footer-reg {
    font-size: 13px !important;
    color: rgba(255, 255, 255, 0.5) !important;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.65);
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-icp {
    margin-top: 10px;
    font-size: 13px;
    line-height: 1.9;
}

.footer-icp a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    transition: color 0.3s ease;
}

.footer-icp a:hover {
    color: rgba(255, 255, 255, 0.95);
}

.footer-sep {
    margin: 0 8px;
    opacity: 0.4;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .about-main,
    .product-wrapper,
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-image img {
        height: 400px;
    }

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

    .team-grid,
    .business-grid,
    .capabilities-grid,
    .cases-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }

    .case-card-featured {
        grid-row: auto;
    }

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

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        align-items: stretch;
        padding: 16px 24px;
        gap: 4px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        opacity: 0;
        transition: var(--transition);
        pointer-events: none;
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .nav-links a {
        padding: 12px 16px;
        width: 100%;
        text-align: left;
    }

    .nav-links .nav-cta {
        margin-left: 0;
        margin-top: 8px;
        text-align: center;
    }

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

    .hero {
        padding: 120px 0 80px;
    }

    .hero-text h1 {
        font-size: 38px;
    }

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

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

    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }

    .section {
        padding: 70px 0;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .about-main,
    .product-wrapper {
        gap: 40px;
    }

    .about-content h2,
    .product-content h2,
    .contact-info h2 {
        font-size: 28px;
    }

    .about-info-grid,
    .about-features,
    .team-grid,
    .business-grid,
    .capabilities-grid,
    .cases-grid,
    .models-grid {
        grid-template-columns: 1fr;
    }

    .team-card {
        flex-direction: column;
        text-align: center;
    }

    .clients-table {
        font-size: 13px;
    }

    .clients-table th,
    .clients-table td {
        padding: 12px 14px;
    }

    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 32px;
    }

    .section-header h2 {
        font-size: 24px;
    }

    .about-image img {
        height: 320px;
    }

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

    .footer-links {
        grid-template-columns: 1fr;
    }

    .product-module {
        flex-direction: column;
    }
}

/* ===== 滚动动画 ===== */
.section-header,
.about-card,
.business-card,
.capability-card,
.case-card,
.team-card,
.model-card,
.timeline-item,
.contact-info,
.contact-form-wrapper {
    opacity: 1;
}

/* ===== 表单提交状态 ===== */
.contact-form.submitting {
    opacity: 0.7;
    pointer-events: none;
}