/* ==================== CSS Variables & Reset ==================== */
:root {
    --primary: #0ABAB5;
    --primary-dark: #089490;
    --primary-light: rgba(10, 186, 181, 0.15);
    --secondary: #E3711B;
    --bg-dark: #0a0a0f;
    --bg-gray: #14141a;
    --bg-card: #1a1a24;
    --bg-card-hover: #242432;
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --danger: #ef4444;
    --danger-light: rgba(239, 68, 68, 0.15);
    --gradient-primary: linear-gradient(135deg, #0ABAB5 0%, #089490 100%);
    --gradient-secondary: linear-gradient(135deg, #E3711B 0%, #c45d10 100%);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
    --border-radius: 16px;
    --border-radius-sm: 12px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

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

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

/* ==================== Navigation - Mobile First ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 15px;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* 全局容器 - 统一各区块宽度 */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.6rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.02em;
}

.logo img {
    height: 32px;
    width: auto;
}

.footer-logo img {
    height: 40px;
    width: auto;
    margin-right: 12px;
    vertical-align: middle;
}

.footer-logo {
    display: flex;
    /* align-items: center; */
    vertical-align: middle;
}

.footer-logo h3 {
    font-size: 48px;
    margin: 0;
}

/* ========== 汉堡菜单按钮 - 青色 ========== */
.menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: #0ABAB5;
    border-radius: 1px;
    transition: transform 0.25s, opacity 0.25s;
}

/* 展开时变X */
.menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ========== 移动端菜单（默认） ========== */
.nav-links {
    position: fixed;
    top: 60px;
    left: 16px;
    right: 16px;
    background: #1a1a24;
    border-radius: 16px;
    padding: 8px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 999;
}

.nav-links.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-links a {
    display: block;
    padding: 14px 16px;
    font-size: 15px;
    font-weight: 500;
    color: #9ca3af;
    border-radius: 10px;
    transition: all 0.2s;
}

.nav-links a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

.nav-links a.active {
    color: #0ABAB5;
    background: rgba(10, 186, 181, 0.1);
}

/* ========== 桌面端导航（全宽横向） ========== */
@media (min-width: 1024px) {
    .menu-toggle {
        display: none;
    }

    .nav-links {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: transparent;
        border-radius: 0;
        padding: 0;
        box-shadow: none;
        display: flex;
        align-items: center;
        gap: 4px;
    }

    .nav-links a {
        padding: 8px 18px;
        border-radius: 50px;
    }

    .nav-links a:hover {
        background: rgba(255, 255, 255, 0.06);
    }
}

/* ==================== Hero Section - Mobile First ==================== */
.hero {
    position: relative;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 16px 48px;
    overflow: hidden;
    text-align: center;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.12);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 50% 40%, rgba(10, 186, 181, 0.06) 0%, var(--bg-dark) 65%);
}

/* Hero 内容 */
.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 380px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(10, 186, 181, 0.12);
    border: 1px solid rgba(10, 186, 181, 0.25);
    border-radius: 50px;
    font-size: 12px;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 20px;
}

.hero-badge .icon-sm {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.hero-title {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 12px;
    color: #fff;
}

.hero-subtitle {
    font-size: 15px;
    font-weight: 500;
    color: var(--primary);
    margin-bottom: 10px;
    letter-spacing: 0.02em;
}

.hero-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    flex-direction: row;
    gap: 12px;
    justify-content: center;
}

/* Hero 产品图 */
.hero-product-img-main {
    position: relative;
    z-index: 2;
    width: 220px;
    height: auto;
    margin-top: 52px;
}

.hero-product-img-main img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 24px 48px rgba(10, 186, 181, 0.25));
    animation: heroFloat 4s ease-in-out infinite;
}

@keyframes heroFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* ==================== Buttons ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(10, 186, 181, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(10, 186, 181, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

/* ==================== Section Headers ==================== */
.section-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 0 16px;
    position: relative;
}

.section-header::after {
    content: '';
    display: block;
    width: 40px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
    margin: 16px auto 0;
}

.section-header h2 {
    font-size: 26px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    color: #fff;
}

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

/* ==================== Product Highlight Section ==================== */
.product-highlight {
    padding: 60px 16px;
    background: var(--bg-gray);
    text-align: center;
}

.highlight-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    max-width: 400px;
    margin: 0 auto;
}

.highlight-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: center;
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.highlight-card:hover {
    transform: translateY(-4px);
    background: var(--bg-card-hover);
}

.highlight-img {
    width: 100%;
    height: 324px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.highlight-img img {
    width: auto;
    height: 100%;
    object-fit: contain;
    transition: var(--transition-normal);
}

.highlight-card:hover .highlight-img img {
    transform: scale(1.05);
}

.highlight-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.highlight-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ==================== About Section - 关于我们 ==================== */
.about-section {
    padding: 60px 16px;
    background: var(--bg-dark);
}

.about-grid {
    display: grid;
    gap: 40px;
    max-width: 1100px;
    margin: 0 auto;
}

.section-header-left {
    text-align: left;
    margin-bottom: 32px;
}

.section-header-left::after {
    margin: 16px 0 0;
}

.section-header-left h2 {
    font-size: 26px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

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

.about-values {
    display: grid;
    gap: 20px;
}

.about-value {
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
}

.about-value h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 8px;
}

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

@media (min-width: 640px) {
    .about-section {
        padding: 80px 32px;
    }
    
    .about-values {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .about-grid {
        gap: 60px;
    }
    
    .section-header-left h2 {
        font-size: 36px;
    }
    
    .about-info {
        max-width: 1100px;
    }

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

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

/* ==================== Contact Section - 联系我们 ==================== */
.contact-section {
    padding: 60px 16px;
    background: var(--bg-gray);
}

.about-info {
    max-width: 900px;
    margin: 0 auto 40px;
    text-align: center;
}

.about-info > p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.contact-cards {
    display: grid;
    gap: 16px;
    max-width: 900px;
    margin: 0 auto 40px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    text-align: left;
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 186, 181, 0.1);
    border-radius: 12px;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--primary);
}

.contact-card h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.contact-card p {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
}

.contact-form-mini {
    max-width: 600px;
    margin: 0 auto;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 640px;
    margin: 0 auto;
}

.contact-method-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-method-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(10, 186, 181, 0.15);
}

.contact-method-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 186, 181, 0.1);
    border-radius: 12px;
    flex-shrink: 0;
}

.contact-method-icon svg {
    width: 24px;
    height: 24px;
    color: var(--primary);
}

.contact-method-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.contact-method-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.contact-method-value {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

@media (min-width: 640px) {
    .contact-section {
        padding: 80px 32px;
    }
    
    .contact-cards {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .contact-cards {
        gap: 24px;
    }
}

/* ==================== Product Specs Section - 产品参数 ==================== */
.specs-section {
    padding: 60px 16px;
    background: var(--bg-gray);
}

.specs-table-wrapper {
    max-width: 1100px;
    margin: 0 auto;
    overflow-x: auto;
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.specs-table th,
.specs-table td {
    padding: 16px 20px;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.specs-table th {
    background: rgba(10, 186, 181, 0.1);
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.specs-table td:first-child {
    color: var(--text-secondary);
    font-size: 14px;
    width: 140px;
}

.specs-table td:nth-child(2) {
    color: #fff;
    font-weight: 600;
    font-size: 15px;
}

.specs-table td:last-child {
    color: var(--text-secondary);
    font-size: 13px;
}

.specs-category-row td {
    background: rgba(10, 186, 181, 0.08) !important;
    color: var(--primary) !important;
    font-weight: 600;
    font-size: 13px !important;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 12px 20px !important;
}

.specs-price-row td {
    background: var(--bg-dark);
    border-bottom: none;
}

.specs-price-row td:first-child {
    font-weight: 600;
    color: #fff !important;
}

.specs-price-value {
    font-size: 28px !important;
    font-weight: 700;
    color: var(--primary) !important;
}

.specs-cta {
    text-align: center;
    margin-top: 40px;
}

.specs-btn {
    display: inline-block;
    padding: 14px 40px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-normal);
    cursor: pointer;
    background: var(--primary);
    color: #0a0a0f;
}

.specs-btn:hover {
    background: #08a5a1;
    transform: translateY(-2px);
}

/* ==================== Pain-Solution Section - 困境与解决方案 ==================== */
.pain-solution {
    padding: 60px 16px;
    background: var(--bg-dark);
}

.pain-solution-list {
    max-width: 480px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

/* 每个困境卡片：困境在上，解决方案在下 */
.pain-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: border-color 0.25s;
}

.pain-card:hover {
    border-color: rgba(10, 186, 181, 0.3);
}

/* 困境区域 */
.pain-problem {
    padding: 24px 20px;
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.18) 0%, rgba(220, 38, 38, 0.06) 100%);
}

.pain-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #dc2626;
    background: rgba(220, 38, 38, 0.25);
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 12px;
}

.pain-title {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 6px;
}

.pain-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

/* 解决方案区域 */
.pain-answer {
    padding: 20px;
    background: linear-gradient(135deg, rgba(10, 186, 181, 0.12) 0%, rgba(10, 186, 181, 0.04) 100%);
}

.answer-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--primary);
    background: rgba(10, 186, 181, 0.2);
    padding: 4px 10px;
    border-radius: 4px;
    margin-bottom: 12px;
}

.answer-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.answer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 16px;
}

.pain-answer img {
    width: 100%;
    border-radius: 8px;
    display: block;
}

/* ==================== Software Section ==================== */
.software-section {
    padding: 60px 16px;
    background: var(--bg-gray);
}

.software-content {
    max-width: 400px;
    margin: 0 auto;
}

.software-screenshot {
    width: 100%;
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 28px;
    box-shadow: var(--shadow-card);
}

.software-screenshot img {
    width: 100%;
    height: auto;
    display: block;
}

/* 功能列表：双栏图标+文字 */
.software-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    list-style: none;
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.software-features li {
    padding: 14px 16px;
    font-size: 13px;
    color: var(--text-secondary);
    background: var(--bg-card);
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background 0.2s;
}

.software-features li:hover {
    background: var(--bg-card-hover);
}

.software-features li::before {
    content: none;
}

.software-features li svg {
    width: 16px;
    height: 16px;
    stroke: var(--primary);
    stroke-width: 2;
    fill: none;
    flex-shrink: 0;
}

/* ==================== Tech Section ==================== */
.tech {
    padding: 60px 16px;
    background: var(--bg-dark);
}

.tech-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    max-width: 400px;
    margin: 0 auto;
}

/* 品牌色顶部条纹 + 图标区渐变 */
.tech-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
}

.tech-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.25s;
}

.tech-card:hover {
    transform: translateY(-4px);
    border-color: rgba(10, 186, 181, 0.25);
}

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

.tech-img {
    width: 100%;
    height: 130px;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(10, 186, 181, 0.08) 0%, rgba(10, 186, 181, 0.02) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tech-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

.tech-card:hover .tech-img img {
    transform: scale(1.05);
}

.tech-card h3 {
    font-size: 16px;
    font-weight: 600;
    padding: 14px 16px 4px;
    color: #fff;
}

.tech-card p {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 4px 16px 16px;
}

/* ==================== CTA Section ==================== */
.cta {
    position: relative;
    padding: 80px 16px;
    text-align: center;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 48px;
    background: linear-gradient(to bottom, transparent, var(--primary));
}

.cta-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.cta-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.08);
}

.cta-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(10, 186, 181, 0.05) 0%, var(--bg-dark) 70%);
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-product {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin: 0 auto 28px;
}

.cta-product img {
    width: 300px;
    height: 300px;
    object-fit: contain;
    filter: drop-shadow(0 12px 32px rgba(10, 186, 181, 0.25));
}

.cta h2 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 10px;
    letter-spacing: -0.02em;
    color: #fff;
}

.cta p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.cta-buttons {
    display: flex;
    flex-direction: row;
    gap: 12px;
    justify-content: center;
}

/* ==================== Footer ==================== */
.footer {
    background: var(--bg-gray);
    padding: 40px 16px 24px;
}

.footer-content {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
}

.footer-brand h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--primary);
    text-align: center
}

.footer-brand p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
    text-align: left;
}

.footer-links {
    margin-bottom: 24px;
}

.footer-links h4 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links a {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    transition: var(--transition-fast);
}

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

.footer-links p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.footer-bottom {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
}

.footer-bottom p {
    font-size: 12px;
    color: var(--text-muted);
}

/* ==================== Products Page ==================== */
.products-hero {
    padding: 120px 16px 60px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-gray) 100%);
}

.products-hero h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 10px;
}

.products-hero p {
    font-size: 14px;
    color: var(--text-secondary);
}

.product-section {
    padding: 40px 16px;
}

.product-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    overflow: hidden;
    margin-bottom: 24px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.product-image {
    width: 100%;
    height: 220px;
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

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

.product-content {
    padding: 24px;
}

.product-tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--gradient-primary);
    border-radius: 50px;
    font-size: 11px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 12px;
}

.product-tag.orange {
    background: var(--gradient-secondary);
}

.product-content h2 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.product-content > p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.product-price {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
}

.product-price span {
    font-size: 16px;
    font-weight: 400;
}

.product-price.orange {
    color: var(--secondary);
}

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

.product-features li {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.product-features li::before {
    content: '✓ ';
    color: var(--primary);
}

.specs-table {
    width: 100%;
    margin-top: 16px;
    border-collapse: collapse;
}

.specs-table td {
    padding: 10px 16px;
    font-size: 13px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.specs-table td:first-child {
    color: var(--text-muted);
    width: 100px;
}

.comparison-table {
    width: 100%;
    font-size: 13px;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: 12px 8px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.comparison-table th:first-child,
.comparison-table td:first-child {
    text-align: left;
    color: var(--text-secondary);
}

.comparison-table th {
    color: var(--text-muted);
    font-weight: 500;
}

/* ==================== About Page ==================== */
.about-hero {
    padding: 120px 16px 60px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-gray) 100%);
}

.about-hero h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 10px;
}

.about-intro {
    padding: 40px 16px;
    background: var(--bg-gray);
}

.about-intro-content {
    max-width: 400px;
    margin: 0 auto;
    text-align: center;
}

.about-intro-content h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--primary);
}

.about-intro-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

.values-section {
    padding: 40px 16px;
    background: var(--bg-dark);
}

.values-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    max-width: 400px;
    margin: 0 auto;
}

.value-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 24px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.value-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    margin: 0 auto 12px;
    background: rgba(10, 186, 181, 0.15);
    border-radius: 16px;
}

.value-icon svg {
    width: 28px;
    height: 28px;
    stroke: var(--primary);
    stroke-width: 1.5;
    fill: none;
}

.value-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.value-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

.timeline-section {
    padding: 40px 16px;
    background: var(--bg-gray);
}

.timeline {
    max-width: 400px;
    margin: 0 auto;
}

.timeline-item {
    position: relative;
    padding-left: 24px;
    padding-bottom: 32px;
    border-left: 2px solid rgba(255, 255, 255, 0.1);
}

.timeline-item:last-child {
    border-left-color: transparent;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -5px;
    top: 0;
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
}

.timeline-item h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-item .date {
    font-size: 13px;
    color: var(--primary);
    margin-bottom: 6px;
}

.timeline-item p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ==================== Contact Page ==================== */
.contact-hero {
    padding: 120px 16px 60px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-gray) 100%);
}

.contact-hero h1 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 10px;
}

.contact-content {
    padding: 40px 16px;
    max-width: 400px;
    margin: 0 auto;
}

.contact-info {
    margin-bottom: 40px;
}

.contact-info h2 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 16px;
}

.contact-icon {
    font-size: 20px;
    width: 44px;
    height: 44px;
    background: var(--bg-card);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--primary);
    stroke-width: 1.5;
    fill: none;
}

.contact-item h4 {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 2px;
}

.contact-item p {
    font-size: 13px;
    color: var(--text-secondary);
}

.after-service {
    margin-top: 24px;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.after-service h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 12px;
}

.after-service p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.contact-form {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.contact-form h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-dark);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

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

.form-submit {
    width: 100%;
    padding: 14px;
    background: var(--gradient-primary);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
}

.form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(10, 186, 181, 0.4);
}

/* ==================== Back to Top ==================== */
.back-to-top {
    position: fixed;
    bottom: 20px;
    left: 20px;
    width: 44px;
    height: 44px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 999;
    box-shadow: 0 4px 20px rgba(10, 186, 181, 0.4);
    border: none;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top svg {
    width: 20px;
    height: 20px;
    fill: #fff;
}

/* ==================== Tablet & Desktop Enhancements ==================== */
@media (min-width: 640px) and (max-width: 1023px) {
    /* Navigation - 中屏保持单行不换行 */
    .navbar {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        border-bottom: none;
    }
    
    .nav-container {
        display: flex;
        flex-wrap: nowrap;
    }
    
    .menu-toggle {
        display: none;
    }
    
    /* 中屏菜单不换行 */
    .nav-links {
        display: flex;
        position: static;
        background: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        flex-wrap: nowrap;
        gap: 2px;
        padding: 0;
        box-shadow: none;
        border-radius: 0;
    }
    
    .nav-links a {
        display: inline-block;
        padding: 8px 12px;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.7);
        border-radius: 20px;
        white-space: nowrap;
    }
    
    .nav-links a:hover {
        color: #fff;
        background: transparent;
    }
    
    .nav-links a.active {
        color: #0ABAB5;
        background: transparent;
    }
    
    /* Hero - 中屏改为左右结构 */
    .hero {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        padding: 100px 32px 60px;
        text-align: left;
        gap: 32px;
    }
    
    .hero-content {
        flex-shrink: 0;
    }
    
    .hero-title {
        font-size: 42px;
        text-align: left;
    }
    
    .hero-subtitle {
        font-size: 17px;
        text-align: left;
    }
    
    .hero-desc {
        font-size: 15px;
        text-align: left;
    }
    
    .hero-buttons {
        flex-direction: row;
        justify-content: flex-start;
    }

    .hero-product-img-main {
        width: 360px;
        height: 360px;
        margin-top: 0;
        flex-shrink: 0;
    }
    
    /* Footer - 中屏横排 */
    .footer-content {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        max-width: 600px;
        text-align: left;
    }
    
    .footer-brand {
        grid-column: span 2;
        text-align: center;
    }
}

@media (min-width: 1024px) {
    /* Navigation */
    .nav-container {
        padding: 0 32px;
    }
    
    .nav-links {
        gap: 12px;
    }
    
    .nav-links a {
        font-size: 14px;
        padding: 8px 20px;
    }
    
/* Hero */
    .hero {
        display: flex !important;
        flex-direction: row !important;
        justify-content: space-between !important;
        padding: 100px 48px 60px;
        text-align: left;
        align-items: center !important;
        gap: 40px;
    }

    .hero-content {
        max-width: 500px;
        text-align: left;
        align-items: flex-start;
        flex-shrink: 0;
    }

    .hero-badge {
        margin-bottom: 24px;
    }

    .hero-title {
        font-size: 52px;
        margin-bottom: 16px;
    }

    .hero-subtitle {
        font-size: 18px;
        margin-bottom: 12px;
    }

    .hero-desc {
        font-size: 15px;
        margin-bottom: 32px;
    }

    .hero-buttons {
        justify-content: flex-start;
    }

    .hero-product-img-main {
        width: 456px;
        height: 456px;
        margin-top: 0;
        flex-shrink: 0;
    }

    /* Pain-Solution - 桌面端2列布局 */
    .pain-solution {
        padding: 100px 32px;
    }

    .pain-solution-list {
        max-width: 1100px;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .pain-problem {
        padding: 32px 28px;
    }

    .pain-title {
        font-size: 28px;
    }

    .pain-desc {
        font-size: 15px;
    }

    .pain-answer {
        padding: 28px;
    }

    .answer-title {
        font-size: 24px;
    }

    .answer-desc {
        font-size: 15px;
    }
    
    /* Sections */
    .product-highlight,
    .tech,
    .software-section {
        padding: 100px 32px;
    }
    
    .section-header {
        margin-bottom: 60px;
    }
    
    .section-header h2 {
        font-size: 40px;
    }
    
    /* Grids */
    .highlight-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 1100px;
    }
    
    .tech-grid {
        grid-template-columns: repeat(3, 1fr);
        max-width: 1100px;
    }

    /* Software section */
    .software-content {
        max-width: 1100px;
    }

    .software-screenshot {
        max-width: 900px;
        margin: 0 auto 28px;
    }

    .software-features {
        grid-template-columns: repeat(3, 1fr);
        max-width: 900px;
        margin: 0 auto;
    }
    
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 1100px;
    }
    
    /* Product Cards */
    .product-section {
        padding: 80px 32px;
    }
    
    .product-card {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        align-items: center;
        padding: 40px;
    }
    
    .product-card.reverse {
        direction: ltr;
    }
    
    .product-card.reverse .product-image {
        order: 2;
    }
    
    .product-card.reverse .product-content {
        order: 1;
    }
    
    .product-image {
        height: 350px;
    }
    
    /* Contact */
    .contact-content {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 40px;
        max-width: 1100px;
        padding: 80px 32px;
    }
}

@media (min-width: 1024px) {
    /* Footer - 横排布局 */
    .footer-content {
        display: grid !important;
        grid-template-columns: 2fr 1fr 1fr 1fr !important;
        max-width: 1100px !important;
        margin: 0 auto !important;
        text-align: left !important;
    }
    
    .footer-brand {
        grid-column: auto !important;
        text-align: left !important;
    }
}

@media (min-width: 1280px) {
    /* Hero */
    .hero {
        display: flex !important;
        flex-direction: row !important;
        justify-content: space-between !important;
        align-items: center !important;
        padding: 120px 64px 80px;
        text-align: left;
        gap: 40px;
    }
    
    .hero-content {
        max-width: 500px;
        text-align: left;
        align-items: flex-start;
        flex-shrink: 0;
    }
    
    .hero-title {
        font-size: 60px;
        text-align: left;
    }
    
    .hero-subtitle {
        text-align: left;
    }
    
    .hero-desc {
        text-align: left;
    }
    
    .hero-buttons {
        justify-content: flex-start;
    }
    
    .hero-product-img-main {
        width: 456px;
        height: 456px;
        margin-top: 0;
        flex-shrink: 0;
    }
    
    /* Sections */
    .highlight-grid {
        max-width: 1100px;
        margin: 0 auto;
    }
    
    .tech-grid {
        grid-template-columns: repeat(3, 1fr);
        max-width: 1100px;
        margin: 0 auto;
    }
    
    .product-highlight,
    .tech,
    .software-section,
    .specs-section {
        padding: 120px 48px;
    }
    
    .specs-table {
        font-size: 15px;
    }
    
    .specs-table th,
    .specs-table td {
        padding: 18px 24px;
    }
    
    .specs-table td:first-child {
        width: 160px;
    }
    
    .specs-price-value {
        font-size: 32px !important;
    }
    
    .product-section {
        padding: 100px 48px;
    }
    
    .product-card {
        max-width: 1000px;
        margin: 0 auto 60px;
    }
}

/* ==================== Animations ==================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* ==================== Utility Classes ==================== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

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

.mt-4 {
    margin-top: 16px;
}

.mb-4 {
    margin-bottom: 16px;
}

/* ========== 修复：about.html 缺失样式 ========== */
.page-hero {
    position: relative;
    min-height: 50vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 120px 16px 60px;
    text-align: center;
}

.company-intro,
.intro-grid,
.intro-content,
.intro-image {
    display: block;
}

/* ========== 修复：products.html 缺失样式 ========== */
.products-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    max-width: 500px;
    margin: 0 auto;
}

.product-badge {
    display: inline-block;
    padding: 6px 14px;
    background: var(--gradient-primary);
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}

.product-gallery {
    width: 100%;
    height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-dark);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

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

.product-info {
    padding: 24px;
}

.product-color {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.product-name {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

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

.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 16px;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
}

.spec-item svg {
    width: 16px;
    height: 16px;
    stroke: var(--primary);
    stroke-width: 1.5;
    fill: none;
}

.product-price {
    margin-bottom: 16px;
    padding: 16px 0;
    border-top: 1px solid rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.price-label {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.price-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
}

.product-actions {
    display: flex;
    flex-direction: row;
    gap: 12px;
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255,255,255,0.2);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.3);
}

/* comparison-section 样式已在下方统一定义 */

/* ========== 修复：contact.html 缺失样式 ========== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.contact-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.05);
}

.contact-card .contact-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    background: rgba(10,186,181,0.15);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-card .contact-icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--primary);
    stroke-width: 1.5;
    fill: none;
}

.contact-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.contact-card p {
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.contact-sub {
    font-size: 12px;
    color: var(--text-muted);
}

.contact-form-section {
    padding: 60px 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.after-sales {
    padding: 60px 16px;
    background: var(--bg-gray);
}

.after-sales-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 500px;
    margin: 0 auto;
}

.after-sales-card {
    background: var(--bg-card);
    border-radius: var(--border-radius);
    padding: 20px;
    text-align: center;
    border: 1px solid rgba(255,255,255,0.05);
}

.after-sales-card svg {
    width: 36px;
    height: 36px;
    stroke: var(--primary);
    stroke-width: 1.5;
    fill: none;
    margin-bottom: 12px;
}

.after-sales-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
}

.after-sales-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ========== Toast 样式 ========== */
.toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.toast-success {
    background: #10b981;
    color: #fff;
}

.toast-error {
    background: #ef4444;
    color: #fff;
}

@media (max-width: 640px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .after-sales-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-methods {
        grid-template-columns: 1fr;
    }
    
    .footer-logo {
        justify-content: center;
    }
    
    .footer-brand p {
        text-align: center;
    }
}

/* ========== 修复：about.html 缺失样式 ========== */

/* Timeline 结构类（HTML 中使用了 timeline-marker / timeline-content / timeline-date / h4） */
.timeline-marker {
    position: absolute;
    left: -5px;
    top: 0;
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    flex-shrink: 0;
}

.timeline-content {
    padding-left: 0;
}

.timeline-date {
    display: inline-block;
    font-size: 13px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 4px;
}

/* timeline-item 内 h4 与旧 h3 规则对齐 */
.timeline-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

/* ========== 修复：products.html 缺失样式 ========== */

/* 产品卡片颜色标记圆点 */
.color-dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* 产品卡片 A/B 系列主题色 */
.product-a {
    border-top: 3px solid var(--primary);
}

.product-b {
    border-top: 3px solid var(--secondary);
}

/* 产品规格列表 - 已在上方定义，此处移除重复 */

/* 对比表格价格行 */
.price-row td {
    font-weight: 700;
    font-size: 18px;
    color: var(--primary);
}

/* products-section 区块 */
.products-section {
    padding: 40px 16px;
    background: var(--bg-dark);
}

/* comparison-section 区块补全 */
.comparison-section {
    padding: 40px 16px;
    background: var(--bg-gray);
    overflow-x: auto;
}

/* intro-grid 桌面双栏布局 */
@media (min-width: 1024px) {
    .intro-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 48px;
        align-items: center;
    }

    .intro-image img {
        width: 100%;
        border-radius: var(--border-radius);
        object-fit: cover;
    }

    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 900px;
    }

    .product-gallery {
        height: 280px;
    }
}

/* ==================== Language Selector ==================== */
.lang-selector {
    position: relative;
}

.lang-selector .current-lang {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: rgba(10, 186, 181, 0.15);
    border: 1px solid rgba(10, 186, 181, 0.4);
    border-radius: 8px;
    color: var(--primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-normal);
    white-space: nowrap;
}

.lang-selector .current-lang:hover {
    background: rgba(10, 186, 181, 0.25);
}

.lang-selector .lang-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.lang-selector .arrow-icon {
    width: 12px;
    height: 12px;
    transition: transform 0.3s;
}

.lang-selector.open .arrow-icon {
    transform: rotate(180deg);
}

.lang-selector .lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    display: none;
    flex-direction: column;
    gap: 4px;
    margin-top: 8px;
    padding: 8px;
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    min-width: 140px;
    z-index: 100;
}

.lang-selector.open .lang-dropdown {
    display: flex;
}

/* 移动端：下拉菜单对齐到左边 */
@media (max-width: 639px) {
    .lang-selector .lang-dropdown {
        right: auto;
        left: 0;
    }
}

.lang-selector .lang-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: transparent;
    border: none;
    border-radius: 8px;
    color: var(--text);
    font-size: 13px;
    transition: var(--transition-normal);
    white-space: nowrap;
    text-align: left;
    width: 100%;
}

.lang-selector .lang-btn .lang-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.lang-selector .lang-btn:hover {
    background: rgba(10, 186, 181, 0.15);
}

.lang-selector .lang-btn.active {
    background: rgba(10, 186, 181, 0.2);
    color: var(--primary);
}

/* 中屏：语言选择器样式 */
@media (min-width: 640px) and (max-width: 1023px) {
    .lang-selector {
        padding: 0;
        margin-left: 4px;
    }
    
    .lang-selector .lang-dropdown {
        position: absolute;
        top: 100%;
        right: 0;
        display: none;
        flex-direction: column;
        gap: 4px;
        margin-top: 8px;
        padding: 8px;
        background: var(--bg-card);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 12px;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
        min-width: 140px;
        z-index: 1000;
    }
    
    .lang-selector.open .lang-dropdown {
        display: flex;
    }
    
    .lang-selector .lang-btn {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 8px 12px;
        background: transparent;
        border: none;
        border-radius: 8px;
        color: var(--text);
        font-size: 13px;
        transition: var(--transition-normal);
        white-space: nowrap;
        text-align: left;
        width: 100%;
    }
    
    .lang-selector .lang-btn .lang-icon {
        width: 16px;
        height: 16px;
        flex-shrink: 0;
    }
    
    .lang-selector .lang-btn:hover {
        background: rgba(10, 186, 181, 0.15);
    }
    
    .lang-selector .lang-btn.active {
        background: rgba(10, 186, 181, 0.2);
        color: var(--primary);
    }
}

/* 桌面端：语言选择器在导航栏最右侧，下拉展开 */
@media (min-width: 1024px) {
    .navbar {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    
    .nav-container {
        display: flex;
        align-items: center;
        width: 100%;
        justify-content: space-between;
    }
    
    .menu-toggle {
        display: none;
    }
    
    .nav-links {
        display: flex;
        align-items: center;
        gap: 4px;
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: transparent;
        border-radius: 0;
        padding: 0;
        box-shadow: none;
    }
    
    .nav-links a {
        padding: 8px 18px;
        border-radius: 50px;
        display: inline-block;
    }
    
    .nav-links a:hover {
        background: rgba(255, 255, 255, 0.06);
    }
    
    .lang-selector {
        padding: 0;
        margin-left: 16px;
    }
    
    .lang-selector .current-lang {
        width: auto;
        justify-content: center;
    }
    
    .lang-selector .lang-dropdown {
        position: absolute;
        top: 100%;
        right: 0;
        display: none;
        flex-direction: column;
        gap: 4px;
        margin-top: 8px;
        padding: 8px;
        background: var(--bg-card);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 12px;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
        min-width: 140px;
        z-index: 100;
    }
    
    .lang-selector.open .lang-dropdown {
        display: flex;
    }
    
    .lang-selector .lang-btn {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 8px 12px;
        background: transparent;
        border: none;
        border-radius: 8px;
        color: var(--text);
        font-size: 13px;
        transition: var(--transition-normal);
        white-space: nowrap;
        text-align: left;
        width: 100%;
    }
    
    .lang-selector .lang-btn .lang-icon {
        width: 16px;
        height: 16px;
        flex-shrink: 0;
    }
    
    .lang-selector .lang-btn:hover {
        background: rgba(10, 186, 181, 0.15);
    }
    
    .lang-selector .lang-btn.active {
        background: rgba(10, 186, 181, 0.2);
        color: var(--primary);
    }
}

/* ==================== 问题反馈 ==================== */
.feedback-section {
    padding: 60px 0;
    background: var(--bg-gray);
}
.feedback-section .container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}
.feedback-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: 32px;
}
.feedback-form .form-row {
    display: flex;
    gap: 16px;
}
.feedback-form .form-group {
    flex: 1;
}
.feedback-form input,
.feedback-form textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #333;
    border-radius: 8px;
    font-size: 14px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s;
    box-sizing: border-box;
    background: #1a1a24;
    color: #fff;
}
.feedback-form input:focus,
.feedback-form textarea:focus {
    border-color: var(--primary);
}
.feedback-form textarea {
    resize: vertical;
    min-height: 100px;
}
.feedback-form input::placeholder,
.feedback-form textarea::placeholder {
    color: #666;
}
.feedback-form .btn {
    align-self: flex-start;
}
.feedback-toast {
    margin-top: 12px;
    font-size: 14px;
    padding: 10px 16px;
    border-radius: 8px;
    display: none;
}
.feedback-toast.success {
    display: block;
    background: rgba(46, 125, 50, 0.2);
    color: #81c784;
}
.feedback-toast.error {
    display: block;
    background: rgba(198, 40, 40, 0.2);
    color: #ef9a9a;
}
@media (max-width: 480px) {
    .feedback-form .form-row {
        flex-direction: column;
    }
}