/* ===== CSS 设计系统 ===== */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --accent: #0066ff;
    --accent-2: #00a3ff;
    --accent-light: #e6f0ff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-tertiary: #94a3b8;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.10);
    --gradient: linear-gradient(135deg, #0066ff 0%, #00a3ff 100%);
    --gradient-soft: linear-gradient(135deg, #e6f0ff 0%, #f0f7ff 100%);
}

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

html {
    scroll-behavior: smooth;
}

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

/* 英文模式字体优先使用 Latin 字体 */
html[lang="en"] body,
html[lang="en"] .nav-menu a,
html[lang="en"] .product-block-content h2,
html[lang="en"] .category-hero-content h1,
html[lang="en"] .detail-hero-name {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
}

.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 40px;
}

/* ===== 导航栏 ===== */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    transition: all 0.3s ease;
}

nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.nav-inner {
    padding: 0 40px;
    height: 64px;
    display: flex;
    align-items: center;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 48px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
}

.nav-brand img {
    height: 32px;
    width: auto;
}

.nav-brand span {
    font-size: 22px;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-menu {
    display: flex;
    gap: 36px;
    list-style: none;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 17px;
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
}

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 24px;
    margin-left: auto;
}

.nav-buy {
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-buy svg {
    width: 18px;
    height: 18px;
}

/* 语言下拉菜单 */
.lang-dropdown {
    position: relative;
}

.lang-trigger {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 15px;
    color: var(--text-primary);
    padding: 6px 0;
    transition: color 0.2s;
    user-select: none;
}

.lang-trigger:hover {
    color: var(--accent);
}

.lang-trigger svg {
    width: 18px;
    height: 18px;
}

.lang-trigger .arrow {
    width: 14px;
    height: 14px;
    transition: transform 0.2s;
}

.lang-dropdown.open .lang-trigger .arrow {
    transform: rotate(180deg);
}

.lang-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 120px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s;
}

.lang-dropdown.open .lang-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-menu li {
    list-style: none;
}

.lang-menu li a {
    display: block;
    padding: 10px 16px;
    text-decoration: none;
    font-size: 14px;
    color: var(--text-secondary);
    transition: all 0.15s;
}

.lang-menu li a:hover {
    background: var(--bg-secondary);
    color: var(--accent);
}

.lang-menu li a.active {
    color: var(--accent);
    font-weight: 600;
    background: var(--accent-light);
}

/* ===== Hero 轮播图 ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: #0f172a;
}

/* 轮播容器 - 全屏铺满 */
.carousel {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

/* 单张轮播图 */
.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1.2s ease-in-out;
}

.carousel-slide.active {
    opacity: 1;
}

/* 轮播指示器 */
.carousel-indicators {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.carousel-indicator {
    width: 40px;
    height: 4px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.35);
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    padding: 0;
}

.carousel-indicator.active {
    background: #fff;
    width: 56px;
}

.carousel-indicator:hover {
    background: rgba(255, 255, 255, 0.6);
}

/* 轮播箭头按钮 */
.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s;
    color: #fff;
}

.carousel-arrow:hover {
    background: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
}

.carousel-arrow svg {
    width: 22px;
    height: 22px;
}

.carousel-arrow.prev {
    left: 32px;
}

.carousel-arrow.next {
    right: 32px;
}

.hero-content {
    position: absolute;
    bottom: 60px;
    left: 0;
    right: 0;
    z-index: 2;
    text-align: center;
    padding: 0 24px;
}

.hero-detail-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 26px;
    background: rgba(0, 0, 0, 0.32);
    color: #fff;
    text-decoration: none;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(14px) saturate(160%);
    -webkit-backdrop-filter: blur(14px) saturate(160%);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.22),
                inset 0 1px 0 rgba(255, 255, 255, 0.4);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.35);
    transition: all 0.3s ease;
}

.hero-detail-btn:hover {
    transform: translateY(-2px);
    background: rgba(0, 0, 0, 0.45);
    border-color: rgba(255, 255, 255, 0.7);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.hero-detail-btn:active {
    transform: translateY(0);
    background: rgba(0, 0, 0, 0.4);
}

/* ===== 通用 Section 样式 ===== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    font-size: 14px;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.section-header h2 {
    font-size: 40px;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    color: var(--text-primary);
}

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

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

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

.product-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
}

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

.product-image {
    height: 180px;
    background: var(--gradient-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-image svg {
    width: 80px;
    height: 80px;
    color: var(--accent);
    opacity: 0.8;
}

.product-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.product-info {
    padding: 24px;
}

.product-name {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.product-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.5;
}

.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.spec-tag {
    font-size: 12px;
    padding: 4px 10px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border-radius: 6px;
    font-weight: 500;
}

/* ===== 核心技术 ===== */
.technology {
    background: #fff;
}

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

.tech-visual {
    position: relative;
    height: 400px;
    background: var(--gradient-soft);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.tech-visual svg {
    width: 200px;
    height: 200px;
    color: var(--accent);
}

.tech-visual::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: radial-gradient(circle, rgba(0, 102, 255, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
}

.tech-content h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.tech-content p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.tech-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.tech-feature {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.tech-feature-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--accent-light);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.tech-feature-icon svg {
    width: 20px;
    height: 20px;
}

.tech-feature-text h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.tech-feature-text p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

/* ===== 三大优势 ===== */
.advantages {
    background: var(--bg-secondary);
}

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

.advantage-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 32px;
    text-align: center;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

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

.advantage-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: var(--gradient);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.advantage-icon svg {
    width: 32px;
    height: 32px;
}

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

.advantage-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== 应用场景 ===== */
.applications {
    background: #fff;
}

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

.app-card {
    position: relative;
    padding: 32px;
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border);
    transition: all 0.3s;
    overflow: hidden;
}

.app-card:hover {
    background: #fff;
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.app-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient);
    opacity: 0;
    transition: opacity 0.3s;
}

.app-card:hover::before {
    opacity: 1;
}

.app-card-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-bottom: 20px;
}

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

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

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

/* ===== SDK 开发者生态 ===== */
.sdk {
    background: var(--bg-secondary);
}

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

.sdk-info h2 {
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.sdk-info p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 28px;
}

.sdk-platforms {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 32px;
}

.platform-tag {
    padding: 8px 16px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.platform-tag:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.sdk-visual {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-md);
}

.code-block {
    background: #0f172a;
    border-radius: 12px;
    padding: 24px;
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 14px;
    line-height: 1.8;
    color: #e2e8f0;
    overflow-x: auto;
}

.code-block .keyword { color: #c084fc; }
.code-block .string { color: #86efac; }
.code-block .comment { color: #64748b; }
.code-block .function { color: #93c5fd; }

/* ===== 合作伙伴 ===== */
.partners {
    background: #fff;
}

.partner-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
}

.partner-item {
    height: 80px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.3s;
}

.partner-item:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== 新闻与洞察 ===== */
.news {
    background: var(--bg-secondary);
}

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

.news-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s;
    cursor: pointer;
}

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

.news-image {
    height: 180px;
    background: var(--gradient-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.news-image svg {
    width: 48px;
    height: 48px;
    color: var(--accent);
    opacity: 0.5;
}

.news-tag {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 4px 12px;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
}

.news-content {
    padding: 24px;
}

.news-date {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: 8px;
}

.news-title {
    font-size: 16px;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.news-excerpt {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== Footer ===== */
footer {
    background: #0f172a;
    color: #cbd5e1;
    padding: 64px 40px 32px;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand h3 {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    color: #94a3b8;
    max-width: 320px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}

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

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    text-decoration: none;
    color: #94a3b8;
    font-size: 14px;
    transition: color 0.2s;
}

.footer-col ul li a:hover {
    color: var(--accent-2);
}

.footer-bottom {
    border-top: 1px solid rgba(148, 163, 184, 0.15);
    padding-top: 24px;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    font-size: 13px;
    color: #64748b;
}

.footer-bottom > span:first-child {
    justify-self: start;
}

.footer-bottom-center {
    justify-self: center;
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: #64748b;
    white-space: nowrap;
}

.footer-bottom-center img {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.footer-bottom-center a {
    color: #64748b;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-bottom-center a:hover {
    color: var(--accent-2);
}

.footer-bottom-links {
    justify-self: end;
    display: flex;
    gap: 24px;
}

.footer-bottom-links a {
    text-decoration: none;
    color: #64748b;
    transition: color 0.2s;
}

.footer-bottom-links a:hover {
    color: var(--accent-2);
}

/* ===== 滚动动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.3s; }

/* ===== 产品中心 Mega Menu ===== */
.nav-item-mega > a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.mega-arrow {
    width: 14px;
    height: 14px;
    transition: transform 0.3s ease;
}

.nav-item-mega:hover .mega-arrow {
    transform: rotate(180deg);
}

.mega-menu {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(238, 241, 246, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.10);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    transform: translateY(-20px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.3s ease,
                visibility 0.3s;
    z-index: 999;
}

.mega-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.mega-menu-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 48px 40px;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 32px;
    min-height: 320px;
}

.mega-menu-col {
    padding: 0 16px;
}

.mega-menu-col h4 {
    font-size: 16px;
    font-weight: 600;
    color: #0891b2;
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(8, 145, 178, 0.15);
    letter-spacing: 0.03em;
    text-shadow: 0 0 12px rgba(8, 145, 178, 0.2);
}

.mega-menu-col ul {
    list-style: none;
}

.mega-menu-col ul li {
    margin-bottom: 16px;
}

.mega-menu-col ul li a {
    text-decoration: none;
    font-size: 15px;
    color: #038bc1;
    font-weight: 500;
    transition: color 0.2s, text-shadow 0.2s;
    text-shadow: 0 0 8px rgba(3, 139, 193, 0.15);
}

.mega-menu-col ul li a:hover {
    color: #22c55e;
    text-shadow: 0 0 12px rgba(34, 197, 94, 0.3);
}

.mega-menu-placeholder {
    font-size: 14px;
    color: var(--text-tertiary);
    font-style: italic;
}

.mega-menu-col-reserved h4 {
    color: var(--text-tertiary);
    border-bottom-color: var(--border);
    text-shadow: none;
}

/* ===== 产品详情页 ===== */
.products-page {
    padding-top: 64px;
    background: #ffffff;
}

/* 面包屑导航 */
.breadcrumb {
    background: #ffffff;
}

.breadcrumb-inner {
    width: 80%;
    max-width: none;
    margin: 0 auto;
    padding: 16px 0;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
}

.breadcrumb a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.breadcrumb-home {
    width: 15px;
    height: 15px;
}

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

.breadcrumb-sep {
    color: var(--text-tertiary);
}

.breadcrumb-current {
    color: var(--text-primary);
    font-weight: 500;
}

.product-block {
    padding: 0;
    display: flex;
    justify-content: center;
}

.product-block-inner {
    width: 80%;
    max-width: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    min-height: 520px;
    padding: 80px 64px;
}

.product-block-light .product-block-inner {
    background: #e6f0ff;
    color: var(--text-primary);
}

.product-block-dark .product-block-inner {
    background: #ffffff;
    color: var(--text-primary);
}

.product-block-content h2 {
    font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #0891b2 0%, #0066ff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.product-block-content p {
    font-size: 17px;
    line-height: 2;
    margin-bottom: 28px;
    opacity: 0.85;
    max-width: 480px;
}

.product-block-category-btn {
    display: inline-block;
    background: #038bc1;
    color: #ffffff;
    text-decoration: none;
    border: none;
    border-radius: 0;
    padding: 10px 28px;
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 28px;
    white-space: nowrap;
    width: auto;
    transition: opacity 0.2s;
}

.product-block-category-btn:hover {
    opacity: 0.85;
}

.product-block-models {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
}

.product-block-models a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    color: #0891b2;
    transition: color 0.2s, text-shadow 0.2s;
    text-shadow: 0 0 8px rgba(8, 145, 178, 0.15);
}

.product-block-models a .model-arrow {
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.product-block-models a:hover {
    color: #22c55e;
    text-shadow: 0 0 12px rgba(34, 197, 94, 0.3);
}

.product-block-models a:hover .model-arrow {
    transform: translateX(6px);
}

.product-block-dark .product-block-models a {
    color: #0891b2;
    text-shadow: 0 0 8px rgba(8, 145, 178, 0.15);
}

.product-block-dark .product-block-models a:hover {
    color: #22c55e;
    text-shadow: 0 0 12px rgba(34, 197, 94, 0.3);
}

.product-block-image img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    object-fit: contain;
}

.product-block-image-large img {
    transform: scale(1.15);
}

.product-block-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.05);
    border-radius: 16px;
    min-height: 300px;
    font-size: 16px;
    color: var(--text-tertiary);
}

.product-block-dark .product-block-placeholder {
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-tertiary);
}

/* Mega Menu 类别标题链接 */
.mega-menu-col h4 a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
}

.mega-menu-col h4 a:hover {
    color: #22c55e;
}

.mega-arrow-right {
    width: 14px;
    height: 14px;
    margin-left: 6px;
    transition: transform 0.2s ease;
}

.mega-menu-col h4 a:hover .mega-arrow-right {
    transform: translateX(3px);
}

/* 产品卡片标题链接 */
.product-block-content h2 a {
    text-decoration: none;
    color: inherit;
    -webkit-text-fill-color: inherit;
}

/* ===== 产品分类详情页 ===== */
.category-page {
    padding-top: 64px;
    background: #ffffff;
}

/* Hero 区 */
.category-hero {
    padding: 0;
    display: flex;
    justify-content: center;
}

.category-hero-inner {
    width: 80%;
    max-width: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    padding: 80px 64px;
    background: linear-gradient(135deg, #e6f0ff 0%, #f0f7ff 100%);
    border-radius: 0;
}

.category-hero-content h1 {
    font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #0891b2 0%, #0066ff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.category-hero-content p {
    font-size: 17px;
    line-height: 2;
    opacity: 0.85;
    max-width: 480px;
}

.category-hero-image img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    object-fit: contain;
}

.category-hero-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    min-height: 300px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 16px;
    color: var(--text-tertiary);
}

.category-hero-placeholder svg {
    width: 64px;
    height: 64px;
    opacity: 0.4;
}

.category-hero-placeholder span {
    font-size: 16px;
}

/* 产品卡片区 */
.product-cards {
    background: #ffffff;
    padding: 0;
}

.product-cards-inner {
    width: 80%;
    max-width: none;
    margin: 0 auto;
    padding: 0 0 96px;
}

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

/* 单个产品卡片 */
.product-card {
    background: rgb(242, 242, 242);
    border: none;
    border-radius: 0;
    overflow: hidden;
    cursor: default;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: none;
    box-shadow: none;
    border-color: transparent;
}

.product-card-image {
    padding: 24px 40px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 280px;
    overflow: hidden;
}

.product-card-image img {
    max-width: 85%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 0;
}

.product-card-body {
    padding: 20px 40px 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card-model {
    color: #0891b2;
    font-size: 30px;
    font-weight: 700;
}

.product-card-name {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 6px;
}

.product-card-params {
    border: 1px solid var(--border);
    border-radius: 0;
    background: #f1f5f9;
    padding: 20px 20px;
    margin: 16px 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.product-card-param {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 17px;
    color: #000000;
}

.product-card-param-icon {
    flex-shrink: 0;
    width: 26px;
    height: 26px;
    object-fit: contain;
}

.product-card-param-label {
    color: #000000;
    min-width: 80px;
    flex-shrink: 0;
}

.product-card-param-value {
    color: #000000;
    font-weight: 500;
}

.product-card-desc {
    font-size: 16px;
    color: #000000;
    line-height: 1.9;
    margin: 0;
}

.product-card-actions {
    display: flex;
    gap: 12px;
    margin-top: auto;
    padding-top: 28px;
}

.btn-detail {
    display: inline-block;
    background: #038bc1;
    color: #ffffff;
    text-decoration: none;
    border-radius: 0;
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    transition: opacity 0.2s;
}

.btn-detail:hover {
    opacity: 0.85;
}

.btn-buy {
    display: inline-block;
    background: #038bc1;
    color: #ffffff;
    text-decoration: none;
    border: none;
    border-radius: 0;
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 500;
    transition: opacity 0.2s;
}

.btn-buy:hover {
    opacity: 0.85;
}

/* 占位卡片 */
.product-card-placeholder {
    opacity: 0.7;
}

.product-card-placeholder:hover {
    transform: none;
    box-shadow: none;
}

.product-card-image-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 85%;
    aspect-ratio: 1584 / 1020;
    background: rgba(0, 0, 0, 0.04);
    border-radius: 0;
    color: var(--text-tertiary);
}

.product-card-image-placeholder svg {
    width: 48px;
    height: 48px;
    opacity: 0.3;
}

.product-card-image-placeholder span {
    font-size: 14px;
}

.product-card-bar {
    height: 12px;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 0;
    margin-bottom: 10px;
}

.product-card-bar-short {
    width: 60%;
}

.product-card-bar-long {
    width: 90%;
    margin-top: 4px;
}

.product-card-params-placeholder {
    gap: 10px;
}

.product-card-params-placeholder .product-card-bar {
    height: 10px;
    margin-bottom: 0;
}

.btn-disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .partner-grid { grid-template-columns: repeat(3, 1fr); }
    .tech-layout, .sdk-content { grid-template-columns: 1fr; }
    .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-menu { display: none; }
    .nav-inner { padding: 0 16px; }
    .nav-left { gap: 0; }
    .hero h1 { font-size: 36px; }
    .stat-number { font-size: 32px; }
    .section-header h2 { font-size: 28px; }
    .product-grid { grid-template-columns: 1fr; }
    .advantage-grid { grid-template-columns: 1fr; }
    .app-grid { grid-template-columns: 1fr; }
    .news-grid { grid-template-columns: 1fr; }
    .partner-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-top { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 12px; }
    footer { padding: 64px 16px 32px; }
    section { padding: 64px 0; }
    .carousel-arrow { width: 36px; height: 36px; }
    .carousel-arrow.prev { left: 12px; }
    .carousel-arrow.next { right: 12px; }
    .carousel-arrow svg { width: 18px; height: 18px; }
    .carousel-indicators { bottom: 20px; gap: 8px; }
    .carousel-indicator { width: 28px; }
    .carousel-indicator.active { width: 40px; }
    .hero-content { bottom: 80px; }
    .mega-menu-inner { grid-template-columns: repeat(2, 1fr); gap: 16px; min-height: auto; padding: 24px 16px; }
    .mega-menu-col:not(:last-child) { border-bottom: none; }
    .product-block-inner { grid-template-columns: 1fr; gap: 32px; width: 90%; }
    .product-block { padding: 48px 0; }
    .category-hero-inner { grid-template-columns: 1fr; gap: 32px; width: 90%; padding: 48px 32px; }
    .category-hero-content h1 { font-size: 36px; }
    .product-cards-inner { width: 90%; padding: 48px 0 64px; }
    .product-cards-grid { grid-template-columns: 1fr; gap: 24px; }
}

/* ===== 导航栏当前页高亮 ===== */
.nav-menu a.nav-active {
    color: var(--accent);
}

.nav-menu a.nav-active::after {
    width: 100%;
}

/* ===== 资源下载页 ===== */
.downloads-page {
    padding-top: 64px;
    background: #ffffff;
    min-height: 100vh;
}

.downloads-search {
    background: var(--bg-secondary);
    padding: 48px 0;
    border-bottom: 1px solid var(--border);
}

.downloads-search-inner {
    width: 80%;
    max-width: none;
    margin: 0 auto;
    display: flex;
    gap: 32px;
    align-items: flex-end;
}

.combobox {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.combobox-label {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.combobox-label::before {
    content: '';
    width: 4px;
    height: 16px;
    background: #05447a;
    border-radius: 2px;
}

.combobox-wrapper {
    position: relative;
}

.combobox-input {
    width: 100%;
    height: 48px;
    padding: 0 44px 0 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    color: var(--text-primary);
    background: #fff;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.combobox-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.combobox-input:disabled {
    background: var(--bg-tertiary);
    color: var(--text-tertiary);
    cursor: not-allowed;
}

.combobox-input::placeholder {
    color: var(--text-tertiary);
}

.combobox-arrow {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
    pointer-events: none;
    transition: transform 0.2s;
}

.combobox-arrow.open {
    transform: translateY(-50%) rotate(180deg);
}

.combobox-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    max-height: 280px;
    overflow-y: auto;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    z-index: 100;
}

.combobox-dropdown.open {
    display: block;
}

.combobox-option {
    padding: 12px 16px;
    font-size: 15px;
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.15s;
}

.combobox-option:hover {
    background: var(--bg-secondary);
    color: var(--accent);
}

.combobox-no-match {
    padding: 12px 16px;
    font-size: 14px;
    color: var(--text-tertiary);
    text-align: center;
}

/* ===== 资料表格 ===== */
.downloads-content {
    padding: 0;
}

.downloads-content-inner {
    width: 80%;
    max-width: none;
    margin: 0 auto;
    padding: 48px 0 96px;
}

.downloads-placeholder {
    text-align: center;
    padding: 80px 0;
    color: var(--text-tertiary);
}

.downloads-placeholder svg {
    width: 56px;
    height: 56px;
    opacity: 0.4;
    margin-bottom: 16px;
}

.downloads-placeholder p {
    font-size: 16px;
}

.downloads-table-wrapper {
    width: 100%;
}

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

.resource-table thead th {
    position: sticky;
    top: 64px;
    z-index: 10;
    background: #05447a;
    padding: 16px 20px;
    text-align: left;
    font-weight: 700;
    font-size: 16px;
    color: #fff;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.resource-table td {
    padding: 14px 20px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

/* 大类分类行 */
.resource-table tr.category-row td {
    font-weight: 700;
    font-size: 16px;
    color: var(--text-primary);
    background: var(--bg-secondary);
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
}

.resource-table tr.category-row.category-divider td {
    border-top: 2px solid #0f172a;
}

/* 文件行 */
.resource-table tr.file-row td {
    border-bottom: 1px solid var(--border);
}

.resource-table tr.file-row:last-child td {
    border-bottom: 1px solid var(--border);
}

/* 列宽控制 */
.resource-table .col-name {
    width: auto;
}

.resource-table .col-version {
    width: 100px;
    white-space: nowrap;
}

.resource-table .col-date {
    width: 140px;
    white-space: nowrap;
}

.resource-table .col-size {
    width: 120px;
    white-space: nowrap;
}

.resource-table .col-download {
    width: 120px;
    white-space: nowrap;
    text-align: center;
}

/* 下载按钮 */
.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    color: var(--accent);
    text-decoration: none;
    transition: background 0.2s;
    vertical-align: middle;
}

.download-btn:hover {
    background: var(--accent-light);
}

.download-btn svg {
    width: 20px;
    height: 20px;
}

/* 文件后缀标签 */
.file-ext-tag {
    display: inline-block;
    margin-left: 8px;
    padding: 2px 8px;
    font-size: 11px;
    font-weight: 700;
    border-radius: 4px;
    letter-spacing: 0.05em;
    vertical-align: middle;
    color: #fff;
    background: var(--text-secondary);
}

.file-ext-tag.ext-pdf { background: #e5322d; }
.file-ext-tag.ext-zip { background: #f59e0b; }
.file-ext-tag.ext-rar { background: #8b5cf6; }
.file-ext-tag.ext-exe { background: #3b82f6; }
.file-ext-tag.ext-msi { background: #3b82f6; }
.file-ext-tag.ext-dmg { background: #6366f1; }
.file-ext-tag.ext-pkg { background: #6366f1; }
.file-ext-tag.ext-doc, .file-ext-tag.ext-docx { background: #2563eb; }
.file-ext-tag.ext-xls, .file-ext-tag.ext-xlsx { background: #16a34a; }
.file-ext-tag.ext-ppt, .file-ext-tag.ext-pptx { background: #ea580c; }
.file-ext-tag.ext-tar, .file-ext-tag.ext-gz { background: #f59e0b; }
.file-ext-tag.ext-7z { background: #8b5cf6; }

/* ===== 资源下载页响应式 ===== */
@media (max-width: 768px) {
    .downloads-search-inner { flex-direction: column; gap: 20px; }
    .downloads-content-inner { width: 90%; }
    .resource-table { font-size: 13px; }
    .resource-table thead th { padding: 10px 12px; }
    .resource-table td { padding: 10px 12px; }
}

/* ===== 产品详情页 ===== */
.detail-page {
    padding-top: 64px;
    background: #ffffff;
    min-height: 100vh;
}

/* Hero 大图区域 */
.detail-hero {
    padding: 0;
    display: flex;
    justify-content: center;
    background: #ffffff;
}

.detail-hero-inner {
    width: 80%;
    max-width: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    padding: 80px 64px;
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(ellipse 600px 400px at 15% 30%, rgba(8, 145, 178, 0.12) 0%, transparent 70%),
        radial-gradient(ellipse 500px 500px at 85% 70%, rgba(0, 102, 255, 0.10) 0%, transparent 70%),
        linear-gradient(135deg, #e6f0ff 0%, #f0f7ff 100%);
}

/* 装饰性网格线 */
.detail-hero-inner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(8, 145, 178, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(8, 145, 178, 0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    -webkit-mask-image: radial-gradient(ellipse at center, black 35%, transparent 75%);
    mask-image: radial-gradient(ellipse at center, black 35%, transparent 75%);
    pointer-events: none;
}

/* 装饰性斜光带 */
.detail-hero-inner::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: linear-gradient(115deg, transparent 40%, rgba(255, 255, 255, 0.35) 50%, transparent 60%);
    transform: rotate(0deg);
    pointer-events: none;
}

.detail-hero-image {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    max-height: 480px;
}

/* 装饰性旋转圆环 */
.detail-hero-rings {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 0;
}

.detail-hero-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    border-radius: 50%;
    border: 1px dashed rgba(8, 145, 178, 0.2);
    transform: translate(-50%, -50%);
    animation: detail-ring-spin 30s linear infinite;
}

.detail-hero-ring-1 { width: 420px; height: 420px; }
.detail-hero-ring-2 { width: 320px; height: 320px; border-color: rgba(8, 145, 178, 0.15); animation-duration: 22s; animation-direction: reverse; }
.detail-hero-ring-3 { width: 220px; height: 220px; border-color: rgba(0, 102, 255, 0.18); animation-duration: 16s; }

@keyframes detail-ring-spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 产品悬浮外层 */
.detail-hero-float {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: detail-float 6s ease-in-out infinite;
    z-index: 1;
}

@keyframes detail-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-14px); }
}

/* 产品光晕 */
.detail-hero-float::before {
    content: '';
    position: absolute;
    width: 80%;
    height: 80%;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(8, 145, 178, 0.15) 0%, rgba(0, 102, 255, 0.08) 35%, transparent 70%);
    filter: blur(30px);
    z-index: 0;
    animation: detail-glow-pulse 5s ease-in-out infinite;
}

@keyframes detail-glow-pulse {
    0%, 100% { transform: scale(1); opacity: 0.7; }
    50% { transform: scale(1.12); opacity: 1; }
}

.detail-hero-image img {
    max-width: 100%;
    max-height: 480px;
    width: auto;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 20px 40px rgba(8, 145, 178, 0.20));
    position: relative;
    z-index: 1;
}

/* 底部投影 */
.detail-hero-float::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 24px;
    border-radius: 50%;
    background: radial-gradient(ellipse, rgba(8, 145, 178, 0.15), transparent 70%);
    filter: blur(8px);
    z-index: 0;
}

/* 浮动标签 */
.detail-hero-tag {
    position: absolute;
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: #0891b2;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(8, 145, 178, 0.25);
    border-radius: 999px;
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 16px rgba(8, 145, 178, 0.10);
    z-index: 2;
    animation: detail-tag-bob 5s ease-in-out infinite;
}

.detail-hero-tag-1 { top: 12%; left: 2%; }
.detail-hero-tag-2 { top: 50%; right: 2%; animation-delay: 1.2s; color: #0066ff; border-color: rgba(0, 102, 255, 0.25); }
.detail-hero-tag-3 { bottom: 10%; left: 8%; animation-delay: 2.4s; }

@keyframes detail-tag-bob {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.detail-hero-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.detail-hero-model {
    font-size: 48px;
    font-weight: 600;
    color: #038bc1;
    letter-spacing: 0.02em;
}

.detail-hero-name {
    font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 48px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0;
    color: #038bc1;
}

.detail-hero-desc {
    font-size: 17px;
    line-height: 2;
    color: #000000;
    max-width: 480px;
    margin: 0;
}

.detail-hero-actions {
    display: flex;
    gap: 16px;
    margin-top: 16px;
}

/* 查看规格按钮（描边） */
.btn-spec {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: #038bc1;
    text-decoration: none;
    border: 2px solid #038bc1;
    border-radius: 0;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    transition: all 0.2s;
}

.btn-spec:hover {
    background: #038bc1;
    color: #ffffff;
}

.btn-spec svg {
    width: 18px;
    height: 18px;
}

/* 立即购买按钮（实心） */
.btn-buy-now {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #038bc1;
    color: #ffffff;
    text-decoration: none;
    border: 2px solid #038bc1;
    border-radius: 0;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    transition: opacity 0.2s;
}

.btn-buy-now:hover {
    opacity: 0.85;
}

.btn-buy-now svg {
    width: 18px;
    height: 18px;
}

/* 特性详解区域 */
.detail-features {
    background: #ffffff;
    padding: 96px 0;
}

.detail-features-inner {
    width: 80%;
    max-width: none;
    margin: 0 auto;
}

.detail-features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 48px;
}

.detail-feature-card {
    background: #eef3fb;
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
}

.detail-feature-card-image {
    width: 100%;
    border-radius: 0;
    overflow: hidden;
}

.detail-feature-card-image img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.detail-feature-card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(8, 145, 178, 0.1);
    border-radius: 0;
}

.detail-feature-card-icon svg {
    width: 32px;
    height: 32px;
    color: #0891b2;
}

.detail-feature-card-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.detail-feature-card-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin: 0;
}

/* 应用场景区域 */
.detail-applications {
    background: #ffffff;
    padding: 96px 0;
}

.detail-applications-inner {
    width: 80%;
    max-width: none;
    margin: 0 auto;
    background: var(--bg-secondary);
    padding: 96px 64px;
}

.detail-app-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 48px;
}

.detail-app-card {
    background: #ffffff;
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    box-shadow: var(--shadow-sm);
}

.detail-app-card-image {
    width: 100%;
    border-radius: 0;
    overflow: hidden;
}

.detail-app-card-image img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

.detail-app-card-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(8, 145, 178, 0.1);
    border-radius: 0;
}

.detail-app-card-icon svg {
    width: 32px;
    height: 32px;
    color: #0891b2;
}

.detail-app-card-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.detail-app-card-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin: 0;
}

/* 产品参数表区域 */
.detail-specs {
    background: #ffffff;
    padding: 48px 0;
}

.detail-specs-inner {
    width: 80%;
    max-width: none;
    margin: 0 auto;
}

.detail-specs-table-wrapper {
    margin-top: 0;
}

.detail-specs-table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
}

.detail-specs-table tr {
    border-bottom: 1px solid #e0e0e0;
}

.detail-specs-table tr:last-child {
    border-bottom: none;
}

.detail-specs-table .spec-category {
    width: 20%;
    padding: 18px 24px;
    font-size: 16px;
    font-weight: 700;
    color: #000000;
    background: #f5f5f5;
    white-space: nowrap;
    vertical-align: middle;
    text-align: center;
    border-right: 1px solid #e0e0e0;
}

.detail-specs-table .spec-label {
    width: 25%;
    padding: 18px 24px;
    font-size: 16px;
    font-weight: 600;
    color: #000000;
    background: #fafafa;
    white-space: nowrap;
    border-right: 1px solid #e0e0e0;
}

.detail-specs-table .spec-value {
    padding: 18px 24px;
    font-size: 16px;
    color: #000000;
}

/* 详情页错误状态 */
.detail-error {
    width: 80%;
    margin: 0 auto;
    padding: 120px 0;
    text-align: center;
}

.detail-error p {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* ===== 产品详情页响应式 ===== */
@media (max-width: 768px) {
    .detail-hero-inner { grid-template-columns: 1fr; gap: 32px; width: 90%; padding: 48px 32px; }
    .detail-hero-name { font-size: 36px; }
    .detail-features-inner { width: 90%; }
    .detail-features-grid { grid-template-columns: 1fr; gap: 24px; }
    .detail-applications-inner { width: 90%; }
    .detail-app-grid { grid-template-columns: 1fr; gap: 24px; }
    .detail-specs-inner { width: 90%; }
    .detail-specs-table .spec-category { width: 25%; padding: 12px 16px; }
    .detail-specs-table .spec-label { width: 30%; padding: 12px 16px; }
    .detail-specs-table .spec-value { padding: 12px 16px; }
}

/* ===== 法律声明页 ===== */
.legal-page {
    background: #ffffff;
    min-height: 60vh;
    padding-top: 64px;
}

.legal-header {
    background: var(--gradient-soft);
    padding: 64px 0;
    text-align: center;
}

.legal-header-inner {
    width: 80%;
    margin: 0 auto;
}

.legal-header h1 {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.legal-header p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
    max-width: 800px;
    margin: 0 auto;
}

.legal-content {
    padding: 24px 0;
}

.legal-content-inner {
    width: 95%;
    margin: 0 auto;
    max-width: 960px;
}

.legal-section {
    padding: 32px 0;
    border-bottom: 1px solid var(--border);
}

.legal-section:last-child {
    border-bottom: none;
}

.legal-section h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.legal-section p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

.legal-section p:last-child {
    margin-bottom: 0;
}

/* ===== 法律声明页响应式 ===== */
@media (max-width: 768px) {
    .legal-header { padding: 40px 0; }
    .legal-header h1 { font-size: 28px; }
    .legal-header p { font-size: 14px; }
    .legal-header-inner,
    .legal-content-inner { width: 90%; }
    .legal-content { padding: 40px 0; }
    .legal-section { padding: 24px 0; }
    .legal-section h3 { font-size: 17px; }
    .legal-section p { font-size: 14px; }
}

/* ===== 技术支持问答页 ===== */
.support-body {
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
}

.support-page {
    display: flex;
    height: 100vh;
    height: 100dvh;
    padding-top: 64px;
    overflow: hidden;
    background: var(--bg-primary);
}

/* 左侧历史会话栏 */
.support-sidebar {
    width: 280px;
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.support-sidebar-top {
    padding: 16px 16px 12px;
}

.support-sidebar-divider {
    height: 1px;
    background: var(--border);
    margin: 0 16px;
}

.support-sidebar-section-title {
    padding: 12px 20px 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.support-new-chat-btn {
    width: 100%;
    height: 42px;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    padding: 0 8px;
    transition: background 0.2s;
}

.support-new-chat-btn:hover {
    background: #f1f5f9;
}

.support-new-chat-btn svg {
    width: 18px;
    height: 18px;
}

.support-history-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.support-history-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
    position: relative;
}

.support-history-item:hover {
    background: var(--bg-tertiary);
}

.support-history-item.active {
    background: var(--accent-light);
}

.support-history-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 24px;
    background: var(--accent);
    border-radius: 0 2px 2px 0;
}

.history-item-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: var(--text-secondary);
}

.support-history-item.active .history-item-icon {
    color: var(--accent);
}

.history-item-title {
    flex: 1;
    font-size: 14px;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-item-delete {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.2s;
}

.support-history-item:hover .history-item-delete {
    opacity: 1;
}

.history-item-delete:hover {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.history-item-delete svg {
    width: 16px;
    height: 16px;
}

.support-history-empty {
    padding: 24px 12px;
    text-align: center;
    font-size: 14px;
    color: var(--text-tertiary);
}

/* 移动端侧栏切换按钮 */
.support-sidebar-toggle {
    display: none;
    position: fixed;
    top: 72px;
    left: 16px;
    z-index: 100;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.support-sidebar-toggle svg {
    width: 20px;
    height: 20px;
}

/* 中间对话区 */
.support-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
    padding: 0;
}

.support-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 24px 10%;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* 欢迎界面 */
.support-welcome {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.welcome-icon {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
}

.welcome-icon svg {
    width: 32px;
    height: 32px;
}

.welcome-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 20px;
    text-align: center;
}

.welcome-desc {
    font-size: 15px;
    color: var(--text-secondary);
    margin-top: 8px;
    text-align: center;
}

.welcome-prompts {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-top: 32px;
    max-width: 560px;
    width: 100%;
}

.prompt-card {
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--bg-primary);
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
    line-height: 1.5;
    transition: all 0.2s;
}

.prompt-card:hover {
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
    background: var(--accent-light);
}

/* 消息气泡 */
.message {
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 15px;
    line-height: 1.6;
    word-break: break-word;
}

.message.user {
    margin-left: auto;
    background: var(--accent);
    color: #fff;
    border-radius: 12px 12px 4px 12px;
}

.message.ai {
    background: transparent;
    color: var(--text-primary);
    border-radius: 12px 12px 12px 4px;
    border: 1px solid transparent;
    transition: border-color 0.2s;
}

.message.ai:hover {
    border-color: #cbd5e1;
}

.message-text {
    white-space: pre-wrap;
}

/* 等待计时提示 */
.message-waiting {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 0;
    color: #94a3b8;
    font-size: 15px;
}

.waiting-dots {
    display: inline-flex;
    gap: 4px;
}

.waiting-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #94a3b8;
    animation: waiting-bounce 1.4s infinite ease-in-out both;
}

.waiting-dots span:nth-child(1) {
    animation-delay: -0.32s;
}

.waiting-dots span:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes waiting-bounce {
    0%, 80%, 100% {
        transform: scale(0.6);
        opacity: 0.4;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

.waiting-text {
    font-size: 15px;
}

.waiting-timer {
    font-size: 14px;
    color: #64748b;
    font-variant-numeric: tabular-nums;
}

/* AI 消息操作栏 */
.message-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
    padding-top: 4px;
}

.message-time {
    font-size: 14px;
    color: #94a3b8;
}

.message-action-btns {
    display: flex;
    align-items: center;
    gap: 4px;
}

.msg-action-btn {
    width: 30px;
    height: 30px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: #94a3b8;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: background 0.15s, color 0.15s;
}

.msg-action-btn:hover {
    background: #f1f5f9;
    color: #475569;
}

.msg-action-btn svg {
    width: 16px;
    height: 16px;
}

.msg-action-btn.active {
    color: #3b82f6;
}

.msg-action-btn.copied {
    color: #22c55e;
}

.msg-action-btn[data-action="dislike"].active {
    color: #ef4444;
}

/* AI 消息 Markdown 渲染样式 */
.markdown-body {
    white-space: normal;
    line-height: 1.8;
    color: #1e293b;
    font-size: 16px;
}

.markdown-body p {
    margin: 0 0 12px;
}

.markdown-body p:last-child {
    margin-bottom: 0;
}

.markdown-body strong {
    font-weight: 600;
    color: #1e293b;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
    margin: 16px 0 8px;
    font-weight: 600;
    line-height: 1.4;
    color: #1e293b;
}

.markdown-body h1 { font-size: 1.3em; }
.markdown-body h2 { font-size: 1.2em; }
.markdown-body h3 { font-size: 1.1em; }
.markdown-body h4 { font-size: 1em; }

.markdown-body ul,
.markdown-body ol {
    margin: 8px 0;
    padding-left: 22px;
}

.markdown-body li {
    margin: 4px 0;
}

.markdown-body li::marker {
    color: #64748b;
}

.markdown-body code {
    font-family: 'Courier New', Consolas, monospace;
    font-size: 0.9em;
    background: rgba(0, 0, 0, 0.08);
    padding: 2px 5px;
    border-radius: 4px;
}

.message.user .markdown-body code,
.message.user .markdown-body pre {
    background: rgba(255, 255, 255, 0.2);
}

.markdown-body pre {
    margin: 8px 0;
    padding: 12px;
    border-radius: 8px;
    background: #f1f3f5;
    border: 1px solid #dee2e6;
    overflow-x: auto;
    position: relative;
}

.markdown-body pre code {
    background: none;
    padding: 0;
    font-size: 0.9em;
}

/* 代码块工具按钮 */
.code-block-actions {
    position: absolute;
    top: 6px;
    right: 6px;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.2s;
}

.markdown-body pre:hover .code-block-actions {
    opacity: 1;
}

.code-action-btn {
    width: 32px;
    height: 32px;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    background: #fff;
    color: #64748b;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: background 0.15s, color 0.15s;
}

.code-action-btn:hover {
    background: #f1f5f9;
    color: #334155;
}

.code-action-btn.copied {
    color: #22c55e;
    border-color: #22c55e;
}

.code-action-btn svg {
    width: 18px;
    height: 18px;
}

.markdown-body blockquote {
    margin: 8px 0;
    padding: 8px 16px;
    border-left: 4px solid #cbd5e1;
    background: #f8fafc;
    border-radius: 0 6px 6px 0;
    color: #64748b;
}

.markdown-body a {
    color: #3b82f6;
    text-decoration: none;
}

.markdown-body a:hover {
    text-decoration: underline;
}

.markdown-body table {
    border-collapse: collapse;
    margin: 10px 0;
    font-size: 0.9em;
    width: 100%;
    border-radius: 8px;
    overflow: hidden;
}

.markdown-body th,
.markdown-body td {
    border: 1px solid #cbd5e1;
    padding: 8px 12px;
    text-align: left;
}

.markdown-body th {
    font-weight: 600;
    background: #e2e8f0;
    color: #334155;
}

.markdown-body tr:hover td {
    background: #f1f5f9;
}

.markdown-body hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 10px 0;
}

/* 消息中的附件（图片和文件统一样式） */
.message-attachment {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
    padding: 6px;
    border-radius: 8px;
    max-width: 220px;
}

.message-attachment-thumb {
    width: 40px;
    height: 40px;
    border-radius: 6px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.2);
}

.message.ai .message-attachment-thumb {
    background: var(--bg-primary);
}

.message-attachment-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message-attachment-thumb svg {
    width: 22px;
    height: 22px;
}

.message-attachment-name {
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

/* 底部输入栏 */
.support-chat-input {
    padding: 12px 10% 20px;
    border-top: 1px solid var(--border);
    background: var(--bg-primary);
}

.chat-input-wrapper {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 8px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.chat-input-wrapper:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}

.chat-upload-btn {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    border: none;
    border-radius: 50%;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s, color 0.2s;
}

.chat-upload-btn:hover {
    background: var(--bg-tertiary);
    color: var(--accent);
}

.chat-upload-btn svg {
    width: 20px;
    height: 20px;
}

.chat-upload-wrap {
    position: relative;
    flex-shrink: 0;
}

.chat-upload-menu {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 0;
    min-width: 180px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 10px;
    box-shadow: var(--shadow-md);
    padding: 4px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(4px);
    transition: opacity 0.18s, transform 0.18s, visibility 0.18s;
    z-index: 50;
}

.chat-upload-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.chat-upload-menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 12px;
    border: none;
    border-radius: 8px;
    background: transparent;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    cursor: pointer;
    transition: background 0.15s;
    text-align: left;
}

.chat-upload-menu-item:hover {
    background: var(--bg-tertiary);
}

.chat-upload-menu-item svg {
    width: 18px;
    height: 18px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.chat-input-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
    min-width: 0;
}

.chat-textarea {
    width: 100%;
    border: none;
    outline: none;
    resize: none;
    background: transparent;
    font-family: inherit;
    font-size: 15px;
    line-height: 1.5;
    color: var(--text-primary);
    min-height: 24px;
    max-height: 120px;
    padding: 8px 4px;
}

.chat-textarea::placeholder {
    color: var(--text-tertiary);
}

/* 统一附件预览（输入框内） */
.chat-attachment-preview {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px;
    max-width: 240px;
}

.chat-attachment-thumb {
    width: 44px;
    height: 44px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-tertiary);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.chat-attachment-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.chat-attachment-thumb svg {
    width: 22px;
    height: 22px;
    color: var(--text-secondary);
}

.chat-attachment-name {
    font-size: 13px;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
}

.chat-attachment-remove {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border: none;
    border-radius: 50%;
    background: var(--text-primary);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    transition: opacity 0.15s;
}

.chat-attachment-remove:hover {
    opacity: 0.8;
}

.chat-attachment-remove svg {
    width: 12px;
    height: 12px;
}

.chat-send-btn {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    border: none;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s;
}

.chat-send-btn:hover {
    opacity: 0.9;
}

.chat-send-btn.disabled {
    opacity: 0.4;
    pointer-events: none;
}

.chat-send-btn svg {
    width: 20px;
    height: 20px;
}

/* ===== 技术支持页响应式 ===== */
@media (max-width: 768px) {
    .support-page {
        flex-direction: column;
    }

    .support-sidebar-toggle {
        display: flex;
    }

    .support-sidebar {
        position: absolute;
        top: 64px;
        left: 0;
        bottom: 0;
        z-index: 50;
        width: 280px;
        transform: translateX(-100%);
        transition: transform 0.25s ease;
        box-shadow: var(--shadow-lg);
    }

    .support-sidebar.open {
        transform: translateX(0);
    }

    .support-chat-messages {
        padding: 16px 5%;
        padding-top: 64px;
    }

    .message {
        max-width: none;
    }

    .welcome-prompts {
        grid-template-columns: 1fr;
    }

    .welcome-title {
        font-size: 20px;
    }

    .support-chat-input {
        padding: 12px 5% 16px;
    }
}