/* ===== CSS Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #0f3460;
    --primary-dark: #0a2547;
    --primary-light: #16537e;
    --accent: #3b82f6;
    --accent-light: #60a5fa;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-white: #ffffff;
    --bg-light: #f8fafc;
    --bg-alt: #f1f5f9;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

ul, ol {
    list-style: none;
}

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

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    font-size: inherit;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    outline: none;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

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

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

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    font-size: 14px;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius);
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary-light) 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

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

.btn-outline:hover {
    background-color: var(--primary);
    color: white;
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-block {
    width: 100%;
}

/* ===== Fade In Animation ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

.fade-in.delay-1 { animation-delay: 0.1s; }
.fade-in.delay-2 { animation-delay: 0.2s; }
.fade-in.delay-3 { animation-delay: 0.3s; }
.fade-in.delay-4 { animation-delay: 0.4s; }
.fade-in.delay-5 { animation-delay: 0.5s; }

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

@media (prefers-reduced-motion: reduce) {
    .fade-in {
        opacity: 1;
        transform: none;
        animation: none;
    }
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== Header & Navigation ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 20px;
    color: var(--primary);
}

.logo-mark {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    border-radius: var(--radius);
    position: relative;
}

.logo-mark::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 18px;
    height: 18px;
    background-color: white;
    border-radius: 3px;
    opacity: 0.9;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 28px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    position: relative;
    padding: 5px 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent);
}

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

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

.nav-link.cta-nav {
    color: var(--accent);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    padding: 160px 0 100px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15, 52, 96, 0.03) 0%, rgba(59, 130, 246, 0.05) 100%);
    z-index: -1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(15, 52, 96, 0.1) 100%);
    color: var(--primary);
    font-size: 14px;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: 24px;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 24px;
}

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

.hero-subtitle {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.hero-phone {
    margin-top: 16px;
}

.phone-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 500;
    color: var(--primary);
}

.phone-link:hover {
    color: var(--accent);
}

.hero-image img {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

/* ===== Platforms Section ===== */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.platform-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

.platform-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-light);
}

.platform-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: white;
}

.platform-icon.douyin {
    background: linear-gradient(135deg, #000 0%, #25f4ee 50%, #fe2c55 100%);
}

.platform-icon.kuaishou {
    background: linear-gradient(135deg, #ff4906 0%, #ff7500 100%);
}

.platform-icon.xiaohongshu {
    background: linear-gradient(135deg, #ff2442 0%, #ff6b81 100%);
}

.platform-icon.shipinhao {
    background: linear-gradient(135deg, #07c160 0%, #1aad19 100%);
}

.platform-icon.bilibili {
    background: linear-gradient(135deg, #00a1d6 0%, #fb7299 100%);
}

.platform-icon.other {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
}

.platform-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.platform-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.platform-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--accent);
}

.platform-card:hover .platform-link {
    color: var(--primary);
}

/* ===== Services Section ===== */
.service-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.service-tab {
    padding: 10px 24px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    background-color: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}

.service-tab:hover {
    color: var(--accent);
    border-color: var(--accent-light);
}

.service-tab.active {
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary-light) 100%);
    color: white;
    border-color: transparent;
}

.service-content {
    display: none;
}

.service-content.active {
    display: block;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 24px;
}

.product-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}

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

.product-card-featured {
    border-color: var(--accent-light);
    box-shadow: 0 0 0 1px var(--accent-light);
}

.product-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    color: white;
    font-size: 12px;
    font-weight: 500;
    border-radius: 12px;
}

.product-header {
    padding: 28px 28px 0;
    margin-bottom: 20px;
}

.product-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.product-platform {
    font-size: 13px;
    color: var(--accent);
    font-weight: 500;
}

.product-body {
    padding: 0 28px;
}

.product-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.product-specs {
    margin-bottom: 20px;
}

.product-specs li {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 8px 0;
    font-size: 14px;
}

.spec-name {
    color: var(--text-secondary);
    flex-shrink: 0;
    margin-right: 16px;
}

.spec-value {
    color: var(--text-primary);
    font-weight: 500;
    text-align: right;
}

.product-price {
    display: flex;
    align-items: baseline;
    gap: 8px;
    padding: 20px 0;
    border-top: 1px solid var(--border);
}

.price-label {
    font-size: 13px;
    color: var(--text-light);
}

.price-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
}

.price-unit {
    font-size: 14px;
    color: var(--text-secondary);
}

.product-footer {
    padding: 0 28px 28px;
}

/* ===== Advantages Section ===== */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.advantage-card {
    text-align: center;
    padding: 32px 24px;
    background-color: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.advantage-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--accent-light);
}

.advantage-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(15, 52, 96, 0.1) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.advantage-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

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

/* ===== Process Section ===== */
.process-steps {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.process-step {
    display: flex;
    gap: 24px;
    position: relative;
    padding-bottom: 40px;
}

.process-step:last-child {
    padding-bottom: 0;
}

.step-number {
    width: 60px;
    height: 60px;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    color: white;
    font-size: 20px;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
}

.step-content {
    flex: 1;
    padding-top: 8px;
}

.step-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

.step-line {
    position: absolute;
    left: 29px;
    top: 60px;
    width: 2px;
    height: calc(100% - 60px);
    background: linear-gradient(to bottom, var(--accent) 0%, var(--border) 100%);
    z-index: 1;
}

.process-step:last-child .step-line {
    display: none;
}

/* ===== Guarantee Section ===== */
.guarantee-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
}

.guarantee-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
}

.guarantee-card:hover {
    box-shadow: var(--shadow);
}

.guarantee-card h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

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

/* ===== News Section - 强制布局规则 不可修改 ===== */
ul.article-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    list-style: none;
    margin: 0;
    padding: 0;
    width: 100%;
    box-sizing: border-box;
}

ul.article-cards > li.article-card {
    min-width: 0;
    width: auto;
    max-width: none;
    margin: 0;
    float: none;
    box-sizing: border-box;
    background-color: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

ul.article-cards > li.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.article-card .card-thumb {
    width: 100%;
    overflow: hidden;
    aspect-ratio: 16 / 10;
}

.article-card .card-thumb img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

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

.article-card .card-title {
    overflow-wrap: anywhere;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    padding: 20px 20px 8px;
    line-height: 1.5;
}

.article-card .card-title a:hover {
    color: var(--accent);
}

.article-card .card-date {
    display: block;
    font-size: 13px;
    color: var(--text-light);
    padding: 0 20px;
}

.article-card .card-summary {
    overflow-wrap: anywhere;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    padding: 8px 20px 20px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-more {
    text-align: center;
    margin-top: 40px;
}

/* ===== FAQ Section ===== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--accent-light);
}

.faq-item.active {
    border-color: var(--accent);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    text-align: left;
}

.faq-icon {
    width: 20px;
    height: 20px;
    position: relative;
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-icon::before,
.faq-icon::after {
    content: '';
    position: absolute;
    background-color: var(--text-secondary);
    transition: var(--transition);
}

.faq-icon::before {
    top: 50%;
    left: 0;
    width: 100%;
    height: 2px;
    transform: translateY(-50%);
}

.faq-icon::after {
    top: 0;
    left: 50%;
    width: 2px;
    height: 100%;
    transform: translateX(-50%);
}

.faq-item.active .faq-icon::after {
    transform: translateX(-50%) rotate(90deg);
    opacity: 0;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-answer p {
    padding: 0 24px 20px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== About Section ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content .section-tag {
    margin-bottom: 16px;
}

.about-title {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.about-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-points {
    margin: 28px 0;
}

.about-point {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    font-size: 15px;
    color: var(--text-primary);
}

.point-icon {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.about-actions {
    display: flex;
    gap: 16px;
    margin-top: 32px;
    flex-wrap: wrap;
}

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.stat-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--accent-light);
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ===== Apply Section ===== */
.apply-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    background-color: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: 48px;
    box-shadow: var(--shadow-lg);
}

.apply-info .section-tag {
    margin-bottom: 16px;
}

.apply-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.apply-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.apply-contact {
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(15, 52, 96, 0.1) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    flex-shrink: 0;
}

.contact-label {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 4px;
}

.contact-value {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
}

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

.apply-tips {
    background-color: var(--bg-light);
    border-radius: var(--radius);
    padding: 20px;
}

.apply-tips h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.apply-tips ul {
    list-style: none;
}

.apply-tips li {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 4px 0;
    padding-left: 20px;
    position: relative;
}

.apply-tips li::before {
    content: '•';
    position: absolute;
    left: 8px;
    color: var(--accent);
}

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

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background-color: var(--bg-white);
    color: var(--text-primary);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

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

.form-notice p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
    padding: 12px;
    background-color: #fffbeb;
    border-radius: var(--radius);
    border-left: 3px solid #f59e0b;
}

/* ===== Footer ===== */
.site-footer {
    background-color: var(--primary-dark);
    color: rgba(255, 255, 255, 0.8);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.logo-footer {
    color: white;
    margin-bottom: 20px;
}

.logo-footer .logo-mark {
    background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
}

.footer-desc {
    font-size: 14px;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 24px;
}

.footer-phone {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: white;
    font-size: 15px;
    font-weight: 500;
}

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

.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: white;
    margin-bottom: 20px;
}

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

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

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

.footer-bottom {
    padding: 24px 0;
}

.footer-grouplinks {
    margin-bottom: 16px;
    font-size: 13px;
}

.grouplinks-title {
    color: rgba(255, 255, 255, 0.5);
    margin-right: 8px;
}

.footer-grouplinks a {
    color: rgba(255, 255, 255, 0.6);
    margin: 0 8px;
    font-size: 13px;
}

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

.footer-copyright {
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.8;
}

.footer-copyright a {
    color: rgba(255, 255, 255, 0.6);
}

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

.disclaimer {
    margin-top: 8px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.4);
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

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

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

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    padding: 20px;
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal-box {
    background-color: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 32px;
    max-width: 420px;
    width: 100%;
    position: relative;
    transform: scale(0.9);
    transition: var(--transition);
}

.modal-overlay.show .modal-box {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    font-size: 24px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.modal-close:hover {
    background-color: var(--bg-alt);
    color: var(--text-primary);
}

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

.modal-box p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.modal-box .btn {
    margin-top: 20px;
    width: 100%;
}

/* ===== Article Detail Page ===== */
.article-page {
    padding-top: 110px;
    padding-bottom: 0;
}

.breadcrumb {
    margin-bottom: 32px;
    font-size: 14px;
    color: var(--text-secondary);
}

.breadcrumb a {
    color: var(--text-secondary);
}

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

.article-wrapper {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
}

.article-header {
    margin-bottom: 32px;
}

.article-title {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.article-summary-text {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    flex: 1;
    min-width: 200px;
}

.article-date {
    font-size: 14px;
    color: var(--text-light);
    flex-shrink: 0;
}

.article-cover-wrapper {
    margin-bottom: 32px;
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.article-cover {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.article-content {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-primary);
    max-width: 100%;
}

.article-content p {
    margin-bottom: 20px;
}

.article-content h2 {
    font-size: 24px;
    font-weight: 700;
    margin: 40px 0 20px;
    color: var(--text-primary);
}

.article-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin: 32px 0 16px;
    color: var(--text-primary);
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    margin: 20px 0;
}

.article-content ul,
.article-content ol {
    margin: 20px 0;
    padding-left: 24px;
}

.article-content li {
    margin-bottom: 8px;
    line-height: 1.7;
}

.article-content ul li {
    list-style: disc;
}

.article-content ol li {
    list-style: decimal;
}

.article-content blockquote {
    padding: 20px 24px;
    background-color: var(--bg-light);
    border-left: 4px solid var(--accent);
    border-radius: 0 var(--radius) var(--radius) 0;
    margin: 24px 0;
    font-style: italic;
    color: var(--text-secondary);
}

.article-cta {
    margin: 48px 0;
    padding: 32px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(15, 52, 96, 0.05) 100%);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.article-cta h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.article-cta p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.article-cta-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.related-services {
    margin: 48px 0;
}

.related-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.related-card {
    padding: 20px;
    background-color: var(--bg-light);
    border-radius: var(--radius);
    transition: var(--transition);
}

.related-card:hover {
    background-color: var(--bg-white);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.related-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

.article-nav {
    margin: 40px 0;
}

.back-to-news {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 500;
    color: var(--accent);
}

.back-to-news:hover {
    color: var(--primary);
}

/* Sidebar */
.article-sidebar {
    position: sticky;
    top: 90px;
    align-self: start;
}

.sidebar-card {
    background-color: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
}

.sidebar-card h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.sidebar-contact p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.sidebar-phone {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 16px;
}

.sidebar-links li {
    margin-bottom: 10px;
}

.sidebar-links a {
    font-size: 14px;
    color: var(--text-secondary);
    padding-left: 12px;
    position: relative;
}

.sidebar-links a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background-color: var(--accent);
    border-radius: 50%;
}

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

.sidebar-tips p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.7;
}

.article-bottom-cta {
    margin-top: 0;
}

.bottom-cta-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}

.bottom-cta-text h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

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

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .apply-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
        padding: 32px 24px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
    
    .article-wrapper {
        grid-template-columns: 1fr;
    }
    
    .article-sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        padding: 20px;
        gap: 20px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.show {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        width: 100%;
        gap: 16px;
    }
    
    .nav-actions {
        width: 100%;
    }
    
    .nav-actions .btn {
        flex: 1;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .platform-grid {
        grid-template-columns: 1fr;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .service-tabs {
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 8px;
    }
    
    .service-tab {
        white-space: nowrap;
    }
    
    .advantage-grid {
        grid-template-columns: 1fr;
    }
    
    .guarantee-grid {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .stat-number {
        font-size: 28px;
    }
    
    .demo-form .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-brand {
        grid-column: 1 / -1;
    }
    
    .article-title {
        font-size: 24px;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
    
    .bottom-cta-wrapper {
        flex-direction: column;
        text-align: center;
    }
    
    .bottom-cta-actions {
        width: 100%;
        justify-content: center;
    }
    
    .bottom-cta-actions .btn {
        flex: 1;
    }
    
    .about-actions {
        flex-direction: column;
    }
    
    .about-actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 24px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .apply-wrapper {
        padding: 24px 16px;
    }
    
    .product-card {
        border-radius: var(--radius);
    }
    
    .product-header,
    .product-body,
    .product-footer {
        padding-left: 20px;
        padding-right: 20px;
    }
    
    .price-value {
        font-size: 24px;
    }
}