/* ===== 变量 & 重置 ===== */
:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #e0f2fe;
    --accent: #f59e0b;
    --accent-light: #fef3c7;
    --bg: #f8fafc;
    --bg-white: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow: 0 4px 24px rgba(14, 165, 233, 0.08);
    --shadow-lg: 0 12px 40px rgba(14, 165, 233, 0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --header-h: 72px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-h);
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

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

/* ===== 通用组件 ===== */
.section {
    padding: 100px 0;
}

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

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--primary);
    background: var(--primary-light);
    padding: 6px 16px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
}

.section-desc {
    font-size: 16px;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    box-shadow: 0 4px 16px rgba(14, 165, 233, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(14, 165, 233, 0.45);
}

.btn-outline {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(8px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: #fff;
}

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

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

.btn-block {
    width: 100%;
}

.gradient-text {
    background: linear-gradient(135deg, #fff 0%, #bae6fd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 图片占位符 */
.image-placeholder {
    background: linear-gradient(135deg, var(--primary-light) 0%, #f0f9ff 100%);
    border: 2px dashed var(--primary);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
    min-height: 280px;
    transition: all var(--transition);
}

.image-placeholder:hover {
    border-color: var(--primary-dark);
    background: linear-gradient(135deg, #dbeafe 0%, #e0f2fe 100%);
}

.image-placeholder.sm {
    min-height: 180px;
    padding: 24px;
}

.image-placeholder.wide {
    min-height: 200px;
}

.image-placeholder.product-ph {
    min-height: 220px;
    border: none;
    background: linear-gradient(160deg, #e0f2fe 0%, #f0f9ff 50%, #fef3c7 100%);
}

.placeholder-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.image-placeholder p {
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 4px;
}

.image-placeholder span {
    font-size: 12px;
    color: var(--text-muted);
}

/* ===== 导航栏（白底 + 深色 Logo/文字，适配浅色轮播） ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-h);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(15, 23, 42, 0.06);
    transition: all var(--transition);
}

.header.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

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

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

.logo-img {
    height: 35px;
    width: auto;
    display: block;
    object-fit: contain;
}

/* 浅色轮播：始终用深色 logo2 */
.logo-img--on-dark {
    display: none;
}

.logo-img--on-light {
    display: block;
}

.nav {
    display: flex;
    gap: 28px;
}

.nav a {
    font-size: 14px;
    font-weight: 500;
    position: relative;
    padding: 4px 0;
    color: var(--text);
}

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

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

.header-phone {
    font-weight: 600;
    font-size: 15px;
    padding: 8px 20px;
    border-radius: 50px;
    background: var(--primary);
    color: #fff !important;
    transition: all var(--transition);
}

.header-phone:hover {
    background: var(--primary-dark);
    transform: scale(1.05);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: all var(--transition);
}

/* ===== Hero 纯图片轮播（按图片比例贴合，无上下左右灰色留白） ===== */
.hero {
    position: relative;
    margin-top: var(--header-h);
    width: 100%;
    aspect-ratio: 16 / 9;
    height: auto;
    overflow: hidden;
    background: #0f172a;
}

.hero-swiper {
    width: 100%;
    height: 100%;
}

.hero-swiper .swiper-slide {
    width: 100%;
    height: 100%;
    background: #0f172a;
}

.hero-swiper .swiper-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

.hero-swiper .swiper-pagination-bullet {
    background: rgba(15, 23, 42, 0.25);
    opacity: 1;
}

.hero-swiper .swiper-pagination-bullet-active {
    background: var(--primary) !important;
}

.hero-nav-prev,
.hero-nav-next {
    color: var(--text) !important;
    background: rgba(255, 255, 255, 0.85);
    width: 44px !important;
    height: 44px !important;
    border-radius: 50%;
    box-shadow: 0 4px 16px rgba(15, 23, 42, 0.12);
}

.hero-nav-prev::after,
.hero-nav-next::after {
    font-size: 16px !important;
}

.hero-nav-prev:hover,
.hero-nav-next:hover {
    color: #fff !important;
    background: var(--primary);
}

/* ===== 公司简介 ===== */
.about {
    background: var(--bg-white);
}

.about-layout {
    display: grid;
    grid-template-columns: 1fr 1.15fr;
    gap: 40px;
    align-items: stretch;
}

.about-intro {
    padding: 40px 36px;
    border-radius: var(--radius);
    background: linear-gradient(160deg, #f0f9ff 0%, #fff 45%, var(--bg) 100%);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}

.about-badge {
    display: inline-block;
    align-self: flex-start;
    font-size: 13px;
    letter-spacing: 2px;
    color: var(--primary-dark);
    background: var(--primary-light);
    padding: 8px 20px;
    border-radius: 50px;
    margin-bottom: 20px;
    font-weight: 500;
}

.about-headline {
    font-size: clamp(28px, 3.2vw, 40px);
    font-weight: 700;
    line-height: 1.25;
    color: var(--text);
    margin-bottom: 16px;
    text-align: left;
}

.about-headline-accent {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 32px;
    text-align: left;
}

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

.about-stats .stat-item {
    text-align: center;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 18px 12px;
}

.about-stats .stat-num {
    display: block;
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-dark);
    line-height: 1.1;
}

.about-stats .stat-label {
    font-size: 13px;
    color: var(--text-muted);
}

.about-body {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about-panel {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 28px;
    box-shadow: var(--shadow);
}

.about-panel-head {
    margin-bottom: 16px;
}

.about-kicker {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 1.5px;
    color: var(--primary);
    margin-bottom: 10px;
}

.about-panel-head h3 {
    font-size: 24px;
    line-height: 1.3;
    color: var(--primary-dark);
}

.about-lead {
    color: var(--text-muted);
    font-size: 15px;
    margin: 0 0 24px;
}

.about-lead strong {
    color: var(--text);
}

.tech-chain {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr;
    align-items: stretch;
    gap: 10px;
    margin: 0 0 24px;
    padding: 16px;
    background: var(--bg-white);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.tech-node {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    text-align: center;
    padding: 8px 4px;
}

.tech-index {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--primary);
    background: var(--primary-light);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

.tech-divider {
    width: 24px;
    height: 2px;
    align-self: center;
    background: linear-gradient(90deg, var(--primary-light), var(--primary));
    border-radius: 2px;
    position: relative;
}

.tech-divider::after {
    content: '';
    position: absolute;
    right: -3px;
    top: 50%;
    width: 6px;
    height: 6px;
    border-top: 2px solid var(--primary);
    border-right: 2px solid var(--primary);
    transform: translateY(-50%) rotate(45deg);
}

.about-note {
    color: var(--text-muted);
    font-size: 14px;
    margin: 0;
    text-align: left;
    padding-left: 14px;
    border-left: 3px solid var(--primary);
}

.about-mv {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    text-align: left;
}

.mv-item {
    background: var(--bg-white);
    border-radius: var(--radius-sm);
    padding: 22px 18px;
    border: 1px solid var(--border);
    border-top: 3px solid var(--primary);
    height: 100%;
    box-shadow: var(--shadow);
}

.mv-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    color: var(--primary);
    margin-bottom: 8px;
}

.mv-item h4 {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--primary-dark);
}

.mv-item p {
    font-size: 13px;
    color: var(--text-muted);
    margin: 0;
    line-height: 1.6;
}

/* ===== 市场 ===== */
.market {
    background: var(--bg-white);
}

.market-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.market-tab {
    padding: 12px 28px;
    border: 2px solid var(--border);
    border-radius: 50px;
    background: var(--bg-white);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    color: var(--text-muted);
}

.market-tab:hover,
.market-tab.active {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
}

.market-panel {
    display: none;
    animation: fadeIn 0.4s ease;
}

.market-panel.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.market-panel-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.market-data h3,
.market-pain h3 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--primary-dark);
}

.data-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 16px;
}

.data-card {
    background: var(--primary-light);
    padding: 20px;
    border-radius: var(--radius-sm);
    text-align: center;
}

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

.data-card span:last-child {
    font-size: 13px;
    color: var(--text-muted);
}

.pain-list {
    list-style: none;
}

.pain-list li {
    padding: 10px 0 10px 24px;
    position: relative;
    font-size: 14px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
}

.pain-list li::before {
    content: '⚠';
    position: absolute;
    left: 0;
    font-size: 12px;
}

.pain-highlight {
    background: var(--accent-light);
    padding: 20px;
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--accent);
    font-size: 15px;
}

.market-note {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 12px;
}

/* ===== 产品 ===== */
.products {
    background: var(--bg);
}

.product-swiper {
    padding: 20px 0 60px;
    overflow: hidden;
}

.product-swiper .swiper-wrapper {
    align-items: stretch;
}

.product-swiper .swiper-slide {
    height: auto;
    display: flex;
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition);
}

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

.product-image {
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
    height: 220px;
    background: linear-gradient(160deg, #e0f2fe 0%, #f0f9ff 50%, #fff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.product-image .image-placeholder.product-ph {
    min-height: 100%;
    height: 100%;
    border-radius: 0;
}

.product-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--primary);
    color: #fff;
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    z-index: 2;
}

.product-badge.hot {
    background: var(--accent);
}

.product-body {
    padding: 28px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-body > p,
.product-body > .feature-list {
    flex: 1;
    margin-bottom: 0;
}

.product-model {
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 1px;
}

.product-body h3 {
    font-size: 20px;
    margin: 8px 0 16px;
    min-height: 2.8em;
    line-height: 1.4;
}

.product-specs {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    min-height: 52px;
    align-content: flex-start;
}

.spec {
    background: var(--bg);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    text-align: center;
}

.spec strong {
    display: block;
    font-size: 14px;
    color: var(--primary-dark);
}

.spec span {
    font-size: 11px;
    color: var(--text-muted);
}

.product-body p {
    font-size: 14px;
    color: var(--text-muted);
}

.feature-list {
    list-style: none;
    margin-top: 8px;
}

.feature-list li {
    font-size: 13px;
    color: var(--text-muted);
    padding: 4px 0 4px 16px;
    position: relative;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

.swiper-button-prev,
.swiper-button-next {
    color: var(--primary) !important;
    background: var(--bg-white);
    width: 44px !important;
    height: 44px !important;
    border-radius: 50%;
    box-shadow: var(--shadow);
}

.product-swiper .swiper-button-prev {
    left: 0 !important;
}

.product-swiper .swiper-button-next {
    right: 0 !important;
}

.swiper-button-prev::after,
.swiper-button-next::after {
    font-size: 18px !important;
}

.swiper-pagination-bullet-active {
    background: var(--primary) !important;
}

.product-features {
    margin-top: 48px;
    background: var(--bg-white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.product-features h3 {
    text-align: center;
    font-size: 22px;
    margin-bottom: 32px;
    color: var(--primary-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    align-items: stretch;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--bg);
    border-radius: var(--radius-sm);
    transition: background var(--transition);
    height: 100%;
    min-height: 72px;
}

.feature-item:hover {
    background: var(--primary-light);
}

.fi-num {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    flex-shrink: 0;
}

.feature-item p {
    font-size: 14px;
    color: var(--text-muted);
}

/* ===== 应用场景 ===== */
.scenarios {
    background: var(--bg);
}

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

.scene-item {
    margin: 0;
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    background: #0f172a;
    aspect-ratio: 4 / 3;
}

.scene-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease;
}

.scene-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.72) 0%, rgba(15, 23, 42, 0.12) 45%, transparent 70%);
    pointer-events: none;
}

.scene-item figcaption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
    padding: 18px 16px;
    margin: 0;
    color: #fff;
    font-size: 15px;
    font-weight: 400;
    letter-spacing: 0.02em;
    line-height: 1.4;
}

.scene-item:hover img {
    transform: scale(1.04);
}

/* ===== 平台优势 ===== */
.advantages {
    background: var(--bg-white);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.adv-card {
    background: var(--bg);
    padding: 32px;
    border-radius: var(--radius);
    transition: all var(--transition);
}

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

.adv-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.adv-card h4 {
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--primary-dark);
}

.adv-card p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.adv-list {
    list-style: none;
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.adv-list li {
    position: relative;
    padding-left: 16px;
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
}

.adv-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary);
}

.traffic-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 18px;
}

.traffic-stat {
    background: var(--bg-white);
    border: 1px solid var(--border);
    padding: 14px 12px;
    border-radius: var(--radius-sm);
    text-align: center;
}

.adv-card--traffic .traffic-stat {
    background: var(--primary-light);
    border-color: transparent;
}

.ts-num {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-dark);
    line-height: 1.2;
    margin-bottom: 4px;
}

.traffic-stat > span:last-child {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 400;
}

.service-motto,
.service-spirit {
    font-size: 13px !important;
    color: var(--primary) !important;
    font-weight: 400;
    margin-top: 8px;
}

.product-matrix {
    text-align: center;
    background: linear-gradient(135deg, var(--primary-light), #fff);
    padding: 40px;
    border-radius: var(--radius);
}

.product-matrix h3 {
    font-size: 20px;
    margin-bottom: 32px;
    color: var(--primary-dark);
}

.matrix-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.matrix-item {
    background: var(--bg-white);
    padding: 16px 24px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow);
    text-align: center;
}

.matrix-item span {
    display: block;
    font-weight: 600;
    font-size: 15px;
}

.matrix-item small {
    font-size: 12px;
    color: var(--text-muted);
}

.matrix-arrow {
    color: var(--primary);
    font-size: 20px;
    font-weight: 700;
}

/* ===== 合作模式 ===== */
.cooperation {
    background: var(--bg);
}

.coop-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.coop-card {
    background: var(--bg-white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    position: relative;
    transition: transform var(--transition);
}

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

.coop-card.featured {
    border: 2px solid var(--primary);
    background: linear-gradient(180deg, var(--primary-light) 0%, #fff 40%);
}

.coop-badge {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
}

.coop-card h3 {
    font-size: 24px;
    margin-bottom: 12px;
}

.coop-card>p {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 24px;
}

.coop-benefits {
    list-style: none;
    margin-bottom: 32px;
}

.coop-benefits li {
    padding: 8px 0 8px 24px;
    position: relative;
    font-size: 14px;
    color: var(--text-muted);
}

.coop-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

/* ===== 页脚 / 联系我们 ===== */
.footer {
    background: #0f172a;
    color: rgba(255, 255, 255, 0.72);
    padding: 64px 0 28px;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.3fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 24px;
}

.footer-brand {
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.footer-brand .logo-img {
    height: 42px;
    width: auto;
    flex-shrink: 0;
}

.footer-brand strong {
    display: block;
    color: #fff;
    font-size: 18px;
    margin-bottom: 4px;
}

.footer-brand p {
    font-size: 12px;
    margin: 0;
}

.footer-slogan {
    margin-top: 10px !important;
    font-size: 13px !important;
    color: rgba(255, 255, 255, 0.55);
}

.footer-col h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 18px;
}

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

.footer-links a {
    font-size: 14px;
    transition: color var(--transition);
}

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

.footer-contact-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-contact-list li span {
    display: block;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.45);
    margin-bottom: 2px;
}

.footer-contact-list a {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.5px;
}

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

.footer-contact-list p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

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

.footer-bottom p {
    font-size: 13px;
    margin-bottom: 8px;
}

.footer-disclaimer {
    font-size: 12px;
    opacity: 0.5;
}

/* ===== 咨询电话弹窗 ===== */
body.modal-open {
    overflow: hidden;
}

.consult-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
}

.consult-modal.open {
    opacity: 1;
    visibility: visible;
}

.consult-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(4px);
}

.consult-modal__dialog {
    position: relative;
    width: 100%;
    max-width: 400px;
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 40px 32px 32px;
    text-align: center;
    transform: translateY(16px) scale(0.96);
    transition: transform var(--transition);
}

.consult-modal.open .consult-modal__dialog {
    transform: translateY(0) scale(1);
}

.consult-modal__close {
    position: absolute;
    top: 12px;
    right: 14px;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    font-size: 28px;
    line-height: 1;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 50%;
    transition: color var(--transition), background var(--transition);
}

.consult-modal__close:hover {
    color: var(--text);
    background: var(--bg);
}

.consult-modal__icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.consult-modal__dialog h3 {
    font-size: 22px;
    color: var(--text);
    margin-bottom: 8px;
}

.consult-modal__tip {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.consult-modal__phone {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.consult-modal__phone:hover {
    color: var(--primary);
}

.consult-modal__dialog .btn {
    width: 100%;
}

/* ===== 回到顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    border: none;
    font-size: 20px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-4px);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .about-layout,
    .footer-main {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .about-intro {
        padding: 32px 28px;
    }

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

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

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        transform: translateY(-120%);
        opacity: 0;
        transition: all var(--transition);
        box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    }

    .nav.open {
        transform: translateY(0);
        opacity: 1;
    }

    .nav.open a {
        color: var(--text) !important;
    }

    .nav-toggle {
        display: flex;
    }

    .header-phone {
        display: none;
    }

    .market-panel-grid,
    .advantages-grid,
    .coop-cards {
        grid-template-columns: 1fr;
    }

    .about-intro {
        padding: 28px 20px;
    }

    .about-panel {
        padding: 24px 20px;
    }

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

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .tech-chain {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .tech-divider {
        width: 2px;
        height: 20px;
        justify-self: center;
        background: linear-gradient(180deg, var(--primary-light), var(--primary));
    }

    .tech-divider::after {
        right: 50%;
        top: auto;
        bottom: -4px;
        transform: translateX(50%) rotate(135deg);
    }

    .footer-links {
        flex-direction: column;
        gap: 10px;
    }

    .scene-list {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
    }

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

    .section {
        padding: 64px 0;
    }

    .hero {
        aspect-ratio: 16 / 9;
        height: auto;
    }

    .hero-nav-prev,
    .hero-nav-next {
        display: none !important;
    }
}

@media (max-width: 480px) {
    .hero {
        aspect-ratio: 16 / 9;
        height: auto;
    }

    .market-tabs {
        flex-direction: column;
        align-items: stretch;
    }

    .scene-list {
        grid-template-columns: 1fr;
    }

    .scene-item figcaption {
        font-size: 14px;
        padding: 16px 14px;
    }
}