/* ============================================
   岭视云山 - 企业官网样式表
   设计理念：简约大气，科技感，专业可信
   ============================================ */

/* ===== CSS 变量定义 ===== */
:root {
    /* 主色调 - 深邃蓝 */
    --primary: #0B1F3A;
    --primary-light: #1a3a5f;
    --primary-lighter: #2a4a6f;

    /* 强调色 - 科技青 */
    --accent: #00B4D8;
    --accent-dark: #0096C7;
    --accent-light: #48CAE4;
    --accent-gradient: linear-gradient(135deg, #00B4D8 0%, #0077B6 100%);

    /* 金色点缀 */
    --gold: #D4A843;
    --gold-light: #E8C158;

    /* 中性色 */
    --white: #FFFFFF;
    --bg-light: #F8FAFC;
    --bg-gray: #F1F5F9;
    --border: #E2E8F0;
    --text-dark: #1E293B;
    --text-medium: #475569;
    --text-light: #94A3B8;

    /* 间距 */
    --section-padding: 100px 0;
    --container-max: 1200px;

    /* 阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --shadow-accent: 0 8px 30px rgba(0, 180, 216, 0.3);

    /* 圆角 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;

    /* 过渡 */
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-dark);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
    list-style: none;
}

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

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

.section {
    padding: var(--section-padding);
}

.section-light {
    background: var(--bg-light);
}

.section-gray {
    background: var(--bg-gray);
}

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

/* ===== 标题样式 ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header .eyebrow {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 16px;
    position: relative;
    padding-left: 40px;
}

.section-header .eyebrow::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 2px;
    background: var(--accent);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-medium);
    max-width: 640px;
    margin: 0 auto;
}

.section-dark .section-header h2 {
    color: var(--white);
}

.section-dark .section-header p {
    color: rgba(255, 255, 255, 0.7);
}

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 1px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(0, 180, 216, 0.45);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
}

.btn-dark-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--border);
}

.btn-dark-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-logo .logo-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-gradient);
    border-radius: var(--radius-sm);
    color: var(--white);
    font-size: 1.3rem;
}

.nav-logo .logo-text {
    line-height: 1.3;
}

.nav-logo .logo-text small {
    display: block;
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--text-light);
    letter-spacing: 0.5px;
}

.nav-logo img {
    height: 52px;
    width: auto;
    display: block;
}

.footer-brand .nav-logo img,
.footer-logo img {
    height: 56px;
    width: auto;
    display: block;
    filter: brightness(0) invert(1);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links a {
    padding: 8px 20px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-dark);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

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

.nav-links a.active {
    color: var(--accent);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
    border-radius: 2px;
}

/* ===== Hero 区域 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: url('../images/hero-bg.jpg') no-repeat center/cover, linear-gradient(135deg, #0B1F3A 0%, #0f2c54 40%, #1a3a5f 100%);
    overflow: hidden;
    color: var(--white);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(100deg, rgba(11, 31, 58, 0.92) 0%, rgba(11, 31, 58, 0.75) 40%, rgba(11, 31, 58, 0.5) 100%);
    z-index: 1;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.hero .container {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0;
    padding-top: 72px;
    width: 100%;
}

.hero-content {
    flex: 0 0 50%;
    max-width: 50%;
    padding: 36px 40px;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-radius: 0;
    border: none;
}

.hero-calligraphy {
    flex: 0 0 50%;
    max-width: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    min-height: 420px;
}

.calligraphy-line {
    font-family: "STXinwei", "STSong", "SimSun", "FangSong", serif;
    font-size: 6.5rem;
    font-weight: 700;
    font-style: normal;
    font-synthesis: none;
    -webkit-text-stroke: 0.5px rgba(255, 255, 255, 0.18);
    color: #ffffff;
    letter-spacing: 18px;
    line-height: 1.2;
    text-shadow:
        0 0 25px rgba(0, 180, 216, 0.6),
        0 0 50px rgba(0, 180, 216, 0.4),
        0 0 80px rgba(72, 202, 228, 0.3);
    white-space: nowrap;
}

.calligraphy-line.line-1 {
    align-self: flex-start;
    margin-left: 30px;
    margin-bottom: 16px;
}

.calligraphy-line.line-2 {
    align-self: flex-end;
    margin-right: -200px;
}

.hero-calligraphy .calligraphy-line .ai-highlight {
    font-family: inherit;
    font-style: normal;
    font-synthesis: none;
    color: #ffffff;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    background: rgba(0, 180, 216, 0.15);
    border: 1px solid rgba(0, 180, 216, 0.3);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--accent-light);
    margin-bottom: 24px;
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.hero h1 {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.45;
    margin-bottom: 22px;
    letter-spacing: 1.5px;
}

.hero h1 .highlight {
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero .hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 40px;
    line-height: 1.8;
}

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

.hero-visual {
    flex: 1;
    max-width: 520px;
    position: relative;
}

/* Hero 装饰图形 */
.hero-orb {
    width: 100%;
    aspect-ratio: 1;
    position: relative;
}

.hero-orb svg {
    width: 100%;
    height: 100%;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* Hero 统计数据 */
.hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 56px;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero-stat .stat-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-light);
    line-height: 1;
}

.hero-stat .stat-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 8px;
}

/* ===== 页面内 Hero (子页面) ===== */
.page-hero {
    position: relative;
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #0B1F3A 0%, #0f2c54 50%, #1a3a5f 100%);
    color: var(--white);
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 70% 30%, rgba(0, 180, 216, 0.12) 0%, transparent 50%);
}

.page-hero::after {
    content: '';
    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;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.page-hero .container {
    position: relative;
    z-index: 2;
}

.page-hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.page-hero .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

.page-hero .breadcrumb a:hover {
    color: var(--accent-light);
}

.page-hero .breadcrumb span {
    color: var(--accent-light);
}

/* ===== 卡片网格 ===== */
.card-grid {
    display: grid;
    gap: 30px;
}

.card-grid-2 { grid-template-columns: repeat(2, 1fr); }
.card-grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ===== 服务卡片 ===== */
.service-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(0, 180, 216, 0.1) 0%, rgba(0, 119, 182, 0.05) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--accent);
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: var(--accent-gradient);
    color: var(--white);
    transform: scale(1.05);
}

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-medium);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.service-card .card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
    transition: var(--transition);
}

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

/* ===== 首页案例卡片（带图片） ===== */
.service-card.case-card {
    padding: 0;
    display: flex;
    flex-direction: column;
}

.case-card-img {
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    flex-shrink: 0;
    position: relative;
}

.case-card-tag {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 12px;
    background: rgba(10, 31, 58, 0.72);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 2;
    letter-spacing: 0.5px;
    line-height: 1.4;
}

.case-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.service-card.case-card:hover .case-card-img img {
    transform: scale(1.06);
}

.case-card-body {
    padding: 28px 30px 34px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

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

.case-card-body p {
    color: var(--text-medium);
    font-size: 0.9rem;
    line-height: 1.65;
    margin-bottom: 0;
    flex: 1;
}

/* ===== 方案核心卡片 ===== */
.solution-core-card {
    display: flex;
    flex-direction: column;
    padding: 32px 28px;
}

.solution-core-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    line-height: 1.4;
    color: var(--primary);
}

.solution-core-card p {
    font-size: 0.88rem;
    line-height: 1.7;
    color: var(--text-medium);
    margin-bottom: 20px;
}

.core-goals {
    border-top: 1px solid var(--border);
    padding-top: 16px;
    margin-bottom: 18px;
}

.core-goals-title {
    display: flex;
    align-items: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 14px;
    letter-spacing: 0.5px;
}

.core-goals-title::before {
    content: '';
    width: 4px;
    height: 16px;
    background: var(--accent-gradient);
    border-radius: 2px;
    margin-right: 10px;
}

.core-goals-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 10px;
}

.core-goal-item {
    display: flex;
    align-items: center;
    font-size: 0.82rem;
    color: var(--text-dark);
    line-height: 1.5;
    padding: 8px 10px;
    background: rgba(0, 180, 216, 0.06);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent);
    transition: var(--transition);
}

.core-goal-item:hover {
    background: rgba(0, 180, 216, 0.12);
    transform: translateX(2px);
}

.core-goal-item::before {
    content: '';
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    margin-right: 8px;
}

/* ===== 建设模块标签 ===== */
.core-tags {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.core-tags-title {
    display: flex;
    align-items: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.core-tags-title::before {
    content: '';
    width: 4px;
    height: 16px;
    background: linear-gradient(135deg, var(--gold) 0%, var(--gold-light) 100%);
    border-radius: 2px;
    margin-right: 10px;
}

.core-tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.core-tag {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--primary-light);
    padding: 6px 14px;
    background: linear-gradient(135deg, rgba(212, 168, 67, 0.08) 0%, rgba(212, 168, 67, 0.04) 100%);
    border: 1px solid rgba(212, 168, 67, 0.25);
    border-radius: 20px;
    transition: var(--transition);
    white-space: nowrap;
}

.core-tag:hover {
    background: linear-gradient(135deg, rgba(212, 168, 67, 0.15) 0%, rgba(212, 168, 67, 0.08) 100%);
    border-color: rgba(212, 168, 67, 0.5);
    color: var(--primary);
    transform: translateY(-1px);
}

/* ===== 方案路径卡片 ===== */
.section-header-sm {
    margin-bottom: 36px;
    padding-top: 20px;
    border-top: 1px dashed var(--border);
}

.section-header-sm h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0;
    letter-spacing: 1px;
}

.path-card {
    display: flex;
    flex-direction: column;
    padding: 32px 28px;
}

.path-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: var(--accent-gradient);
    color: #fff;
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 12px rgba(0, 180, 216, 0.3);
}

.path-card h3 {
    font-size: 1.15rem;
    margin-bottom: 20px;
    line-height: 1.4;
    color: var(--primary);
}

.path-points {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: auto;
}

.path-point {
    padding-left: 14px;
    border-left: 3px solid var(--accent);
    transition: var(--transition);
}

.path-point:hover {
    border-left-color: var(--primary);
    transform: translateX(2px);
}

.path-point-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
    letter-spacing: 0.3px;
}

.path-point-desc {
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--text-medium);
}

/* ===== 场景化方案卡片 ===== */
.scenario-grid {
    gap: 24px;
}

.scenario-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    cursor: pointer;
    position: relative;
}

.scenario-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: rgba(0, 180, 216, 0.3);
}

.scenario-image-wrap {
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    position: relative;
}

.scenario-image-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: var(--transition);
}

.scenario-card:hover .scenario-image-wrap img {
    transform: scale(1.05);
}

.scenario-content {
    padding: 20px 22px 24px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.scenario-content h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.4;
    margin: 0;
}

.scenario-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    background: rgba(0, 180, 216, 0.08);
    padding: 5px 14px;
    border-radius: 20px;
    letter-spacing: 0.5px;
}

.scenario-consult-hint {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    opacity: 0;
    transform: translateY(4px);
    transition: var(--transition);
    margin-top: 2px;
}

.scenario-card:hover .scenario-consult-hint {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 特性列表 ===== */
.feature-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.feature-item .check-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(0, 180, 216, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
}

.feature-item .feature-text h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 4px;
}

.feature-item .feature-text p {
    font-size: 0.9rem;
    color: var(--text-medium);
}

/* ===== 关于我们 - 图片+文字布局 ===== */
.about-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-visual {
    position: relative;
}

.about-visual .img-frame {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 1/1;
    background: var(--white);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
}

.about-visual .img-frame .about-logo-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.about-visual .floating-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 24px 28px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 16px;
}

.about-visual .floating-badge .badge-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.about-visual .floating-badge .badge-info h4 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
}

.about-visual .floating-badge .badge-info p {
    font-size: 0.8rem;
    color: var(--text-light);
}

.about-text h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 20px;
}

.about-text .about-title-nowrap {
    font-size: 1.7rem;
    white-space: nowrap;
}

.about-text .lead {
    font-size: 1.1rem;
    color: var(--text-medium);
    margin-bottom: 28px;
    line-height: 1.8;
}

.about-text .features {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 36px;
}

/* ===== 使命愿景 ===== */
.mvv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.mvv-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.mvv-card {
    text-align: center;
    padding: 48px 32px;
    border-radius: var(--radius-lg);
    background: var(--white);
    border: 1px solid var(--border);
    transition: var(--transition);
}

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

.mvv-card .mvv-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0, 180, 216, 0.1) 0%, rgba(0, 119, 182, 0.05) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.mvv-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

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

/* ===== 公司愿景 ===== */
.vision-section {
    background: linear-gradient(135deg, var(--primary) 0%, #0d2a4d 100%);
    color: var(--white);
    text-align: center;
    padding: 100px 0;
}

.vision-content .eyebrow {
    color: var(--accent);
    letter-spacing: 4px;
    margin-bottom: 16px;
}

.vision-content h2 {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 24px;
}

.vision-text {
    font-size: 1.6rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

.vision-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
    display: inline-block;
    margin: 0 8px;
}

/* ===== 时间线（左右交替布局） ===== */
.timeline {
    position: relative;
    max-width: 960px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent) 0%, var(--border) 100%);
}

.timeline-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    position: relative;
    margin-bottom: 40px;
}

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

/* 奇数项：内容在左侧 */
.timeline-item:nth-child(odd) .timeline-content {
    grid-column: 1;
    text-align: right;
    margin-right: 36px;
}

/* 偶数项：内容在右侧 */
.timeline-item:nth-child(even) .timeline-content {
    grid-column: 2;
    text-align: left;
    margin-left: 36px;
}

/* 圆点绝对定位在竖线正中央 */
.timeline-item .timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    top: 38px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    border: 4px solid var(--white);
    box-shadow: 0 0 0 3px var(--accent);
    z-index: 2;
}

.timeline-item .timeline-content {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 24px 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.timeline-item .timeline-content:hover {
    box-shadow: var(--shadow-md);
    transform: scale(1.02);
}

.timeline-item .timeline-year {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 8px;
}

.timeline-item .timeline-content h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 10px;
}

.timeline-item .timeline-content p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-medium);
}

/* ===== 产品/方案板块 ===== */
.solution-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.solution-block:last-child {
    margin-bottom: 0;
}

.solution-block.reverse {
    direction: rtl;
}

.solution-block.reverse > * {
    direction: ltr;
}

.solution-visual {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 5/4;
    position: relative;
    cursor: zoom-in;
    transition: var(--transition);
}

.solution-visual:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.15);
}

.solution-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    display: block;
}

.solution-content h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

.solution-content .solution-desc {
    font-size: 1.05rem;
    color: var(--text-medium);
    margin-bottom: 28px;
    line-height: 1.8;
}

.solution-content .solution-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 32px;
}

.solution-features .sf-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--text-dark);
}

.solution-features .sf-item .sf-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}

/* ===== 技术标签 ===== */
.tech-tags {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-top: 16px;
    justify-items: stretch;
}

.tech-tag {
    padding: 6px 16px;
    background: rgba(0, 180, 216, 0.08);
    color: var(--accent-dark);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(0, 180, 216, 0.15);
    text-align: center;
    white-space: nowrap;
}

/* ===== 产品中心 ===== */
.product-filter {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
}

.filter-btn {
    padding: 8px 22px;
    background: var(--white);
    color: var(--text-medium);
    border: 2px solid var(--border);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.filter-btn.active {
    background: var(--accent);
    color: var(--white);
    border-color: var(--accent);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    min-height: 300px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

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

.product-card .product-img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    background: var(--bg-light);
}

/* 参考表格类（算力/模型对照表）：保持图片完整可见 */
.product-card .product-img--reference {
    object-fit: contain;
    padding: 8px;
    background: #f6f8fb;
}

.product-card .product-body {
    padding: 20px 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card .product-category {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 8px;
}

.product-card .product-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.product-card .product-desc {
    font-size: 0.9rem;
    color: var(--text-medium);
    line-height: 1.6;
    margin-bottom: 16px;
    flex: 1;
}

.product-card .product-link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.product-placeholder {
    grid-column: 1 / -1;
    text-align: center;
    padding: 80px 20px;
    color: var(--text-light);
}

.product-placeholder svg {
    margin-bottom: 20px;
    opacity: 0.3;
}

.product-placeholder p {
    font-size: 1rem;
    color: var(--text-light);
}

/* 产品详情弹窗 */
.product-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 31, 58, 0.6);
    backdrop-filter: blur(4px);
    z-index: 999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.product-modal-overlay.active {
    display: flex;
}

.product-modal {
    background: var(--white);
    border-radius: var(--radius-lg);
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.product-modal-close {
    position: absolute;
    top: 16px;
    right: 20px;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 50%;
    font-size: 1.4rem;
    cursor: pointer;
    color: var(--text-medium);
    transition: var(--transition);
    z-index: 1;
}

.product-modal-close:hover {
    background: rgba(0, 0, 0, 0.1);
}

.product-modal-img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

/* 参考表格类弹窗大图：可滚动查看完整对照表 */
.product-modal-img--reference {
    display: block;
    width: 100%;
    height: auto;
    max-height: none;
    aspect-ratio: auto;
    object-fit: contain;
    background: #f6f8fb;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.product-modal-reference-tools {
    padding: 12px 40px;
    background: #f6f8fb;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-medium);
    border-bottom: 1px solid var(--border);
}

.product-modal-reference-tools a {
    color: var(--accent);
    font-weight: 600;
}

.product-modal-body {
    padding: 32px 40px;
}

.product-modal-body .product-category {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.product-modal-body h3 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

.product-modal-body .product-modal-desc {
    font-size: 1rem;
    color: var(--text-medium);
    line-height: 1.8;
    margin-bottom: 28px;
}

.product-params {
    width: 100%;
    border-collapse: collapse;
}

.product-params th,
.product-params td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}

.product-params th {
    font-weight: 600;
    color: var(--primary);
    background: var(--bg-light);
    width: 30%;
}

.product-params td {
    color: var(--text-medium);
}

/* ===== 产品中心弹窗内数据表格（算力/大模型参考表） ===== */
.product-modal-table {
    margin-top: 8px;
}

.product-table-section {
    margin-top: 28px;
}

.product-table-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 6px;
    text-align: center;
}

.product-table-subtitle {
    font-size: 0.9rem;
    color: var(--text-medium);
    text-align: center;
    margin-bottom: 20px;
}

.product-table-group-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary);
    margin: 28px 0 12px;
    padding-left: 12px;
    border-left: 4px solid var(--accent);
}

.product-table-scroll {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    margin-bottom: 12px;
    background: var(--white);
}

.product-data-table {
    width: 100%;
    min-width: 680px;
    border-collapse: collapse;
    font-size: 0.88rem;
    background: var(--white);
}

.product-data-table thead th {
    background: var(--primary);
    color: var(--white);
    padding: 12px 14px;
    text-align: left;
    font-weight: 600;
    white-space: nowrap;
    border-bottom: 1px solid rgba(255,255,255,0.2);
}

.product-data-table tbody td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text-dark);
    line-height: 1.55;
    vertical-align: top;
}

.product-data-table tbody tr:nth-child(even) {
    background: #f8fafc;
}

.product-data-table tbody tr:hover {
    background: rgba(0, 180, 216, 0.06);
}

.product-table-note {
    font-size: 0.85rem;
    color: var(--text-medium);
    margin-top: 8px;
    line-height: 1.6;
}

/* 弹窗宽度加宽，适配表格 */
.product-modal {
    max-width: 960px;
}

.stats-band {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.stats-band::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 30% 50%, rgba(0, 180, 216, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(0, 119, 182, 0.08) 0%, transparent 50%);
}

.stats-band .container {
    position: relative;
    z-index: 2;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stats-grid .stat-item .stat-num {
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-light);
    line-height: 1;
    margin-bottom: 12px;
}

.stats-grid .stat-item .stat-num .suffix {
    font-size: 1.5rem;
}

.stats-grid .stat-item .stat-label {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ===== CTA 区域 ===== */
.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    text-align: center;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(0, 180, 216, 0.15) 0%, transparent 60%);
}

.cta-section .container {
    position: relative;
    z-index: 2;
}

.cta-section h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-section p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 36px;
}

.cta-section .hero-actions {
    justify-content: center;
}

/* ===== 联系页面 ===== */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
}

.contact-info-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    position: relative;
    overflow: hidden;
}

.contact-info-card::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -30%;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.1) 0%, transparent 70%);
}

.contact-info-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
}

.contact-info-card > p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 36px;
    position: relative;
}

.contact-info-list {
    position: relative;
}

.contact-info-item {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
    align-items: flex-start;
}

.contact-info-item .ci-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-light);
    flex-shrink:: 0;
}

.contact-info-item .ci-text h4 {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 4px;
    font-weight: 400;
}

.contact-info-item .ci-text p {
    font-size: 1rem;
    font-weight: 500;
}

/* 联系表单 */
.contact-form {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 48px 40px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-medium);
    text-decoration: none;
    margin-bottom: 16px;
    padding: 6px 14px;
    border-radius: 20px;
    background: var(--bg-light);
    transition: var(--transition);
}

.back-btn:hover {
    color: var(--accent);
    background: rgba(0, 180, 216, 0.08);
}

.back-btn svg {
    transition: transform 0.2s ease;
}

.back-btn:hover svg {
    transform: translateX(-3px);
}

.contact-form h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.contact-form > p {
    color: var(--text-medium);
    margin-bottom: 32px;
    font-size: 0.95rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--text-dark);
    background: var(--bg-light);
    transition: var(--transition);
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(0, 180, 216, 0.1);
}

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

.form-message {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    margin-bottom: 20px;
    display: none;
}

.form-message.success {
    background: rgba(34, 197, 94, 0.1);
    color: #16a34a;
    border: 1px solid rgba(34, 197, 94, 0.2);
    display: block;
}

.form-message.error {
    background: rgba(239, 68, 68, 0.1);
    color: #dc2626;
    border: 1px solid rgba(239, 68, 68, 0.2);
    display: block;
}

/* 地图区域 */
.map-section {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: var(--bg-gray);
    aspect-ratio: 21/9;
    position: relative;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--primary);
    color: rgba(255, 255, 255, 0.7);
    padding: 70px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-brand .nav-logo {
    color: var(--white);
    margin-bottom: 20px;
}

.footer-brand .nav-logo .logo-text small {
    color: rgba(255, 255, 255, 0.5);
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.6);
    max-width: 320px;
}

.footer-col h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 20px;
}

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

.footer-col ul li a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

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

.footer-contact .fc-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    margin-bottom: 16px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-contact .fc-item svg {
    flex-shrink: 0;
    color: var(--accent-light);
    margin-top: 3px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
    transition: var(--transition);
}

.footer-bottom a:hover {
    color: var(--accent-light);
}

.psb-filing {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.psb-badge {
    width: 18px;
    height: 18px;
    display: inline-block;
    vertical-align: middle;
}

/* ===== 案例筛选标签 ===== */
.case-filter {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 50px;
}

.case-filter-btn {
    padding: 10px 24px;
    border: 2px solid var(--border);
    background: var(--white);
    color: var(--text-medium);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.case-filter-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.case-filter-btn.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: var(--white);
    box-shadow: var(--shadow-accent);
}

/* ===== 案例展示卡片 ===== */
.case-showcase-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.case-showcase-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    cursor: pointer;
}

.case-showcase-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.case-showcase-visual {
    aspect-ratio: 4/3;
    position: relative;
    overflow: hidden;
}

.case-showcase-visual svg {
    width: 100%;
    height: 100%;
}

.case-showcase-tag {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 5px 14px;
    background: rgba(0, 180, 216, 0.9);
    color: var(--white);
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 600;
    backdrop-filter: blur(4px);
}

.case-showcase-body {
    padding: 32px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.case-showcase-body h3 {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 10px;
}

.case-showcase-body .case-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.case-showcase-body .case-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--text-light);
}

.case-showcase-body .case-meta span svg {
    color: var(--accent);
}

.case-showcase-body .case-desc {
    font-size: 0.95rem;
    color: var(--text-medium);
    line-height: 1.8;
    margin-bottom: 20px;
    flex: 1;
}

.case-showcase-body .case-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.case-showcase-body .case-highlight {
    padding: 5px 12px;
    background: rgba(0, 180, 216, 0.06);
    color: var(--accent-dark);
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
}

.case-showcase-body .case-result {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--accent);
}

/* ===== 方案分类头部 ===== */
.solution-category {
    margin-bottom: 60px;
}

.solution-category-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 40px;
    padding: 32px 40px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: var(--radius-lg);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.solution-category-header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 180, 216, 0.1) 0%, transparent 70%);
}

.solution-category-header .sc-number {
    font-size: 3rem;
    font-weight: 800;
    color: rgba(72, 202, 228, 0.3);
    line-height: 1;
    position: relative;
}

.solution-category-header .sc-info {
    position: relative;
}

.solution-category-header .sc-info h3 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 6px;
}

.solution-category-header .sc-info p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ===== 方案子卡片网格 ===== */
.solution-sub-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.solution-sub-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.solution-sub-card .ssc-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(0, 180, 216, 0.1) 0%, rgba(0, 119, 182, 0.05) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-bottom: 20px;
    transition: var(--transition);
}

.solution-sub-card:hover .ssc-icon {
    background: var(--accent-gradient);
    color: var(--white);
}

.solution-sub-card h4 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.solution-sub-card .ssc-desc {
    font-size: 0.92rem;
    color: var(--text-medium);
    line-height: 1.7;
    margin-bottom: 20px;
}

.solution-sub-card .ssc-features {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.solution-sub-card .ssc-features .ssf-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--text-dark);
}

.solution-sub-card .ssc-features .ssf-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
}

/* ===== 方案架构图 ===== */
.solution-arch {
    background: linear-gradient(135deg, #0B1F3A 0%, #1a3a5f 100%);
    border-radius: var(--radius-lg);
    padding: 48px;
    margin-top: 40px;
    position: relative;
    overflow: hidden;
}

.solution-arch h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 32px;
    text-align: center;
}

.solution-arch-layers {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.solution-arch-layer {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 28px;
    background: rgba(72, 202, 228, 0.08);
    border: 1px solid rgba(72, 202, 228, 0.2);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.solution-arch-layer:hover {
    background: rgba(72, 202, 228, 0.12);
    border-color: rgba(72, 202, 228, 0.4);
}

.solution-arch-layer .sal-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-light);
    min-width: 100px;
    flex-shrink: 0;
}

.solution-arch-layer .sal-items {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.solution-arch-layer .sal-item {
    padding: 6px 16px;
    background: rgba(72, 202, 228, 0.1);
    border: 1px solid rgba(72, 202, 228, 0.2);
    border-radius: 6px;
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.85);
}

/* ===== 适用场景标签 ===== */
.scenario-section {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 32px;
}

.scenario-item {
    text-align: center;
    padding: 28px 16px;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.scenario-item:hover {
    background: var(--white);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.scenario-item .si-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    border-radius: 50%;
    background: rgba(0, 180, 216, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.scenario-item .si-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
}

/* ===== 案例统计 ===== */
.case-stats-band {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: 60px 0;
    position: relative;
    overflow: hidden;
}

.case-stats-band::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 50% 50%, rgba(0, 180, 216, 0.1) 0%, transparent 60%);
}

.case-stats-band .container {
    position: relative;
    z-index: 2;
}

.case-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.case-stats-grid .cs-item .cs-num {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-light);
    line-height: 1;
    margin-bottom: 8px;
}

.case-stats-grid .cs-item .cs-label {
    font-size: 0.92rem;
    color: rgba(255, 255, 255, 0.7);
}

/* ===== 方案流程路线图 ===== */
.solution-roadmap {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin-top: 48px;
    flex-wrap: wrap;
    justify-content: center;
}

.solution-roadmap-step {
    flex: 1;
    min-width: 160px;
    max-width: 200px;
    text-align: center;
    position: relative;
    padding: 0 12px;
}

.solution-roadmap-step .srs-circle {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--white);
    border: 3px solid var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--accent);
    position: relative;
    z-index: 2;
}

.solution-roadmap-step .srs-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 6px;
}

.solution-roadmap-step .srs-desc {
    font-size: 0.82rem;
    color: var(--text-medium);
    line-height: 1.5;
}

.solution-roadmap-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 30px;
    left: 50%;
    right: -50%;
    height: 3px;
    background: var(--border);
    z-index: 1;
}

.solution-roadmap-step:not(:last-child) .srs-circle::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 100%;
    width: 100%;
    transform: translateY(-50%);
    margin-left: 3px;
}

/* ===== 方案页面文档图片 ===== */
.solution-doc-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    background: var(--white);
    margin-top: 28px;
    cursor: zoom-in;
    transition: var(--transition);
}

.solution-doc-image:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.solution-doc-image img {
    width: 100%;
    height: auto;
    display: block;
}

.solution-image-caption {
    text-align: center;
    padding: 14px 20px;
    font-size: 0.85rem;
    color: var(--text-medium);
    background: var(--bg-light);
    border-top: 1px solid var(--border);
}

/* ===== 案例图片展示 ===== */
.case-showcase-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    transition: transform 0.6s ease;
}

.case-showcase-card:hover .case-showcase-visual img {
    transform: scale(1.05);
}

.case-showcase-visual::after {
    content: '点击咨询 →';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px 20px;
    background: linear-gradient(transparent, rgba(11, 31, 58, 0.85));
    color: var(--white);
    font-size: 0.9rem;
    font-weight: 600;
    text-align: right;
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 3;
}

.case-showcase-card:hover .case-showcase-visual::after {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 展示案例模块 ===== */
.display-case-category {
    margin-bottom: 56px;
}

.display-category-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border);
}

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

.display-case-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
    background: var(--white);
    position: relative;
}

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

.display-case-card img {
    width: 100%;
    height: auto;
    display: block;
}

.display-case-name {
    text-align: center;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--primary);
    padding: 16px 12px;
    margin: 0;
    border-top: 1px solid var(--border);
}

.display-case-card .display-case-name::after {
    content: ' · 点击咨询';
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    opacity: 0;
    transition: var(--transition);
}

.display-case-card:hover .display-case-name::after {
    opacity: 1;
}

/* ===== 列表案例分类 ===== */
.case-list-section {
    margin-bottom: 50px;
}

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

.case-list-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: var(--transition);
}

.case-list-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-md);
}

.case-list-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
}

.case-list-card ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.case-list-card li {
    font-size: 0.85rem;
    color: var(--text-medium);
    padding-left: 16px;
    position: relative;
    line-height: 1.6;
}

.case-list-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
}

/* ===== 图片灯箱 ===== */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(11, 31, 58, 0.95);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.lightbox-close {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.lightbox-close:hover {
    background: var(--accent);
    border-color: var(--accent);
}

.lightbox-caption {
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    text-align: center;
    max-width: 80%;
}

/* ===== 滚动动画 ===== */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.fade-up-delay-1 { transition-delay: 0.1s; }
.fade-up-delay-2 { transition-delay: 0.2s; }
.fade-up-delay-3 { transition-delay: 0.3s; }
.fade-up-delay-4 { transition-delay: 0.4s; }

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero h1 { font-size: 2rem; }
    .calligraphy-line { font-size: 4.8rem; letter-spacing: 14px; }
    .calligraphy-line.line-1 { margin-left: 20px; }
    .calligraphy-line.line-2 { margin-right: -120px; }
    .hero-content { padding: 28px 32px; }
    .section-header h2 { font-size: 2.1rem; }

    .about-split,
    .solution-block,
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .solution-block.reverse { direction: ltr; }

    .mvv-grid { grid-template-columns: repeat(2, 1fr); }
    .mvv-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 40px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .case-showcase-grid { grid-template-columns: 1fr; }
    .solution-sub-grid { grid-template-columns: 1fr 1fr; }
    .scenario-section { grid-template-columns: 1fr 1fr; }
    .display-case-grid { grid-template-columns: repeat(2, 1fr); }
    .case-list-grid { grid-template-columns: repeat(2, 1fr); }

    .card-grid-3 { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
    .mvv-grid,
    .mvv-grid-4 { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    :root { --section-padding: 60px 0; }

    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: var(--transition);
    }

    .nav-links.open {
        transform: translateY(0);
    }

    .nav-links a {
        width: 100%;
        padding: 14px 20px;
        border-radius: var(--radius-sm);
    }

    .nav-links a.active::after { display: none; }

    .nav-toggle { display: flex; }

    .nav-logo img { height: 44px; }

    .footer-brand .nav-logo img,
    .footer-logo img { height: 48px; }
    .hero { min-height: auto; padding: 120px 0 80px; background-position: center center; }

    .hero::before {
        background: linear-gradient(180deg, rgba(11, 31, 58, 0.9) 0%, rgba(11, 31, 58, 0.7) 60%, rgba(11, 31, 58, 0.4) 100%);
    }

    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content {
        flex: 0 0 auto;
        max-width: 100%;
        width: 100%;
        padding: 32px 24px;
    }

    .hero-calligraphy {
        flex: 0 0 auto;
        max-width: 100%;
        width: 100%;
        min-height: auto;
        padding: 40px 24px 60px;
    }

    .calligraphy-line {
        font-size: 4rem;
        letter-spacing: 12px;
    }

    .calligraphy-line.line-1 {
        margin-left: 12px;
        margin-bottom: 10px;
    }

    .calligraphy-line.line-2 {
        margin-right: -80px;
    }

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

    .hero-visual { max-width: 300px; margin-top: 40px; }

    .hero h1 { font-size: 1.8rem; }
    .hero .hero-subtitle { font-size: 1rem; }

    .hero-stats {
        flex-wrap: wrap;
        justify-content: center;
        gap: 32px;
    }

    .page-hero { padding: 110px 0 60px; }
    .page-hero h1 { font-size: 2rem; }

    .section-header h2 { font-size: 1.7rem; }
    .section-header p { font-size: 0.95rem; }

    .card-grid-2,
    .card-grid-3,
    .card-grid-4 {
        grid-template-columns: 1fr;
    }

    .stats-grid { grid-template-columns: 1fr 1fr; gap: 30px; }

    .footer-grid { grid-template-columns: 1fr; gap: 30px; }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .timeline {
        max-width: 100%;
        padding: 20px 0 20px 28px;
    }

    .timeline::before {
        left: 8px;
        transform: none;
    }

    .timeline-item {
        grid-template-columns: 1fr;
    }

    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        grid-column: 1;
        text-align: left;
        margin-right: 0;
        margin-left: 0;
    }

    .timeline-item .timeline-dot {
        left: 8px;
        transform: none;
        top: 32px;
    }

    .timeline-item .timeline-content {
        padding: 20px 22px;
    }

    .about-visual .floating-badge {
        right: 0;
        bottom: -10px;
        padding: 16px 20px;
    }

    .about-visual .img-frame {
        aspect-ratio: 1/1;
        padding: 24px;
    }

    .product-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .product-filter {
        gap: 8px;
    }

    .filter-btn {
        padding: 6px 16px;
        font-size: 0.82rem;
    }

    .product-modal-body {
        padding: 24px 28px;
    }

    .product-data-table {
        min-width: 560px;
        font-size: 0.78rem;
    }

    .product-data-table thead th,
    .product-data-table tbody td {
        padding: 8px 10px;
    }

    .product-table-title {
        font-size: 1.1rem;
    }

    .product-table-subtitle {
        font-size: 0.82rem;
    }

    .product-table-group-title {
        font-size: 0.95rem;
    }

    .vision-content h2 { font-size: 1.9rem; }
    .vision-text { font-size: 1.25rem; }
    .vision-number { font-size: 2.2rem; }

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

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

    .case-showcase-grid { grid-template-columns: 1fr; }
    .solution-sub-grid { grid-template-columns: 1fr; }
    .scenario-section { grid-template-columns: 1fr 1fr; }
    .case-stats-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
    .solution-arch { padding: 32px 20px; }
    .solution-arch-layer { flex-direction: column; align-items: flex-start; gap: 12px; }
    .solution-arch-layer .sal-label { min-width: auto; }
    .solution-roadmap { flex-direction: column; gap: 24px; }
    .solution-roadmap-step { max-width: 100%; }
    .solution-roadmap-step:not(:last-child)::after { display: none; }
    .solution-category-header { flex-direction: column; text-align: center; padding: 28px 24px; }
    .display-case-grid { grid-template-columns: 1fr; }
    .case-list-grid { grid-template-columns: 1fr; }

    .contact-info-card,
    .contact-form { padding: 32px 24px; }

    .about-text .about-title-nowrap { font-size: 1.4rem; }

    .tech-tags { gap: 8px; }
}

@media (max-width: 480px) {
    .scenario-section { grid-template-columns: 1fr; }
    .case-stats-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.5rem; }
    .calligraphy-line { font-size: 3rem; letter-spacing: 8px; }
    .calligraphy-line.line-1 { margin-left: 8px; }
    .calligraphy-line.line-2 { margin-right: -50px; }
    .section-header h2 { font-size: 1.5rem; }
    .stats-grid { grid-template-columns: 1fr; }
    .hero-stats { gap: 24px; }
    .hero-stat .stat-num { font-size: 1.6rem; }
    .product-grid { grid-template-columns: 1fr; }
    .tech-tags { grid-template-columns: 1fr; }
}