/* ============================================
   80tg.com Conversion-Optimized Styles
   Covers: hero, trust stats, cases, services,
   why-choose, resource lead, FAQ, floating
   buttons, modals, smart popup, header CTA
   ============================================ */

/* ---------- Variables ---------- */
:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #e8f0fe;
    --accent: #ff6b35;
    --accent-dark: #e55a2b;
    --text-dark: #1a1a2e;
    --text-body: #333;
    --text-muted: #666;
    --text-light: #999;
    --bg-white: #fff;
    --bg-light: #f8f9fa;
    --bg-section: #f0f4f8;
    --border: #e0e0e0;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: 0.3s ease;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-body);
    background: var(--bg-white);
    -webkit-font-smoothing: antialiased;
    padding-top: 70px;
}
a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--primary-dark);
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-dark);
}
ul, ol {
    list-style: none;
}

/* ---------- Header & Navigation ---------- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    z-index: 1000;
    transition: all var(--transition);
}
.header.scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
}
.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    max-width: 1200px;
    margin: 0 auto;
}
.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 70px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    flex-shrink: 0;
}
.logo img {
    height: 36px;
    width: auto;
}
.logo span {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
    white-space: nowrap;
}
@media (max-width: 1200px) {
    .logo span {
        display: none;
    }
}

/* Desktop Navigation */
.nav-links-desktop {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-shrink: 1;
}
.nav-links-desktop > li {
    position: relative;
    flex-shrink: 0;
}
.nav-links-desktop > li > a {
    display: block;
    padding: 10px 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    white-space: nowrap;
}
.nav-links-desktop > li > a:hover {
    color: var(--primary);
    background: var(--primary-light);
}

/* Dropdown */
.has-dropdown {
    position: relative;
}
.dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-white);
    min-width: 180px;
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-sm);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition);
    z-index: 100;
}
.has-dropdown:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.dropdown li a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--text-body);
    text-decoration: none;
    transition: all var(--transition);
}
.dropdown li a:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* Hamburger Menu */
.hamburger-menu {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background var(--transition);
}
.hamburger-menu:hover {
    background: var(--bg-light);
}
.hamburger-menu i {
    font-size: 20px;
    color: var(--text-dark);
}

/* Desktop: hide hamburger, show nav links */
@media (min-width: 769px) {
    .hamburger-menu {
        display: none;
    }
}

/* Mobile: hide desktop nav, show hamburger */
@media (max-width: 768px) {
    .nav-links-desktop {
        display: none;
    }
    .hamburger-menu {
        display: flex;
    }
}

/* Mobile Navigation */
.mobile-nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-white);
    padding: 20px;
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform var(--transition);
    z-index: 999;
}
.mobile-nav.active {
    transform: translateX(0);
}
.mobile-nav > li {
    border-bottom: 1px solid var(--border);
}
.mobile-nav > li > a {
    display: block;
    padding: 14px 0;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-dark);
}
.mobile-nav .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding: 0 0 10px 16px;
    display: none;
}
.mobile-nav .has-dropdown.open .dropdown {
    display: block;
}
.mobile-nav .dropdown li a {
    padding: 10px 0;
    font-size: 14px;
    color: var(--text-muted);
}

/* Overlay */
.overlay {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition);
}
.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* ---------- Container ---------- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---------- Section Header ---------- */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-header h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}
.section-header p {
    font-size: 16px;
    color: var(--text-muted);
}

/* ---------- Fade-in Animation ---------- */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in-up.visible,
.fade-in-up[style*="transition-delay"] {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Hero Section ---------- */
.hero {
    position: relative;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    min-height: 520px;
    display: flex;
    align-items: center;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="1" fill="rgba(255,255,255,0.05)"/><circle cx="80" cy="40" r="1.5" fill="rgba(255,255,255,0.03)"/><circle cx="50" cy="70" r="1" fill="rgba(255,255,255,0.04)"/></svg>');
    opacity: 0.5;
}
.hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 20px 60px;
}
.hero-slider {
    position: relative;
}
.hero-slider .slide {
    display: none;
}
.hero-slider .slide.active {
    display: block;
    animation: fadeIn 0.6s ease;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.hero-slider .slide h1,
.hero-slider .slide h2 {
    font-size: 40px;
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 16px;
    max-width: 700px;
}
.hero-slider .slide p {
    font-size: 18px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 32px;
    max-width: 600px;
}
.hero-cta-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.cta-primary-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}
.cta-primary-btn:hover {
    background: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255,107,53,0.4);
}
.cta-secondary-index-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    background: transparent;
    color: #ffffff;
    border: 2px solid #475569;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}
.cta-secondary-index-btn:hover {
    border-color: #fff;
    background: rgba(255,255,255,0.1);
}
.cta-secondary-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    background: transparent;
    color: #08045e;
    border: 2px solid #475569;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}
.cta-secondary-btn:hover {
    border-color: #fff;
    background: rgba(255,255,255,0.1);
}
.slider-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 3;
}
.slider-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.3);
    cursor: pointer;
    transition: all var(--transition);
}
.slider-dots .dot.active {
    background: var(--accent);
    transform: scale(1.2);
}

/* ---------- Trust Stats ---------- */
.trust-stats {
    background: var(--bg-white);
    padding: 48px 0;
    margin-top: -40px;
    position: relative;
    z-index: 5;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    text-align: center;
}
.stat-item {
    padding: 24px 16px;
}
.stat-number {
    font-size: 48px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 8px;
}
.stat-number span {
    font-size: 24px;
    font-weight: 600;
}
.stat-label {
    font-size: 15px;
    color: var(--text-muted);
}

/* ---------- Featured Cases ---------- */
.featured-cases {
    padding: 80px 0;
    background: var(--bg-light);
}
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.case-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}
.case-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}
.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.case-card:hover .case-image img {
    transform: scale(1.05);
}
.case-industry {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--primary);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}
.case-content {
    padding: 20px;
}
.case-content h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    line-height: 1.4;
}
.case-content p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 12px;
}
.case-metrics {
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
}
.case-metrics .metric {
    font-size: 13px;
    color: var(--accent);
    font-weight: 600;
}
.case-metrics .metric i {
    margin-right: 4px;
}
.case-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition);
}
.case-link:hover {
    color: var(--primary-dark);
}
.case-link i {
    transition: transform var(--transition);
}
.case-link:hover i {
    transform: translateX(4px);
}
.empty-cases {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
    font-size: 16px;
}
.section-cta {
    text-align: center;
    margin-top: 40px;
}
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border: 2px solid var(--primary);
    color: var(--primary);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
}
.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

/* ---------- Services Section ---------- */
.services {
    padding: 80px 0;
    background: var(--bg-white);
}
.service-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}
.tab-button {
    padding: 12px 24px;
    background: var(--bg-light);
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 500;
    color: var(--text-body);
    cursor: pointer;
    transition: all var(--transition);
}
.tab-button:hover {
    border-color: var(--primary);
    color: var(--primary);
}
.tab-button.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.tab-content-wrapper {
    min-height: 300px;
}
.tab-content {
    display: none;
}
.tab-content.active {
    display: block;
    animation: fadeIn 0.4s ease;
}
.service-details {
    display: flex;
    gap: 40px;
}
.service-left-col {
    flex: 1;
}
.service-right-col {
    width: 280px;
    flex-shrink: 0;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    padding: 24px;
    align-self: flex-start;
}
.service-left-col h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.service-left-col h3 img {
    width: 32px;
    height: 32px;
}
.service-icon {
    color: var(--primary);
    font-size: 28px;
}
.service-price-tag {
    display: inline-flex;
    align-items: baseline;
    gap: 8px;
    background: linear-gradient(135deg, #fff5f0, #fff0e8);
    border: 1px solid #ffd4c0;
    border-radius: var(--radius-sm);
    padding: 10px 20px;
    margin-bottom: 20px;
}
.price-from {
    font-size: 13px;
    color: var(--text-muted);
}
.price-value {
    font-size: 22px;
    font-weight: 800;
    color: var(--accent);
}
.service-left-col > p {
    font-size: 15px;
    color: var(--text-body);
    line-height: 1.7;
    margin-bottom: 20px;
}
.service-benefits {
    list-style: none;
    padding: 0;
    margin: 0 0 20px;
}
.service-benefits li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.6;
}
.service-benefits li i {
    color: #52c41a;
    margin-top: 3px;
    flex-shrink: 0;
}
.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}
.service-tags span {
    padding: 6px 14px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}
.service-buttons {
    display: flex;
    gap: 12px;
}
.service-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    border: none;
}
.service-btn.details {
    background: var(--primary);
    color: #fff;
}
.service-btn.details:hover {
    background: var(--primary-dark);
}
.service-btn.consult {
    background: var(--bg-light);
    color: var(--primary);
    border: 2px solid var(--primary);
}
.service-btn.consult:hover {
    background: var(--primary-light);
}

/* Hot articles sidebar */
.hot-articles-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary);
}
.hot-articles-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.hot-articles-list li {
    padding: 10px 0;
    border-bottom: 1px dashed var(--border);
}
.hot-articles-list li:last-child {
    border-bottom: none;
}
.hot-articles-list li a {
    font-size: 14px;
    color: var(--text-body);
    text-decoration: none;
    line-height: 1.5;
    transition: color var(--transition);
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.hot-articles-list li a:hover {
    color: var(--primary);
}

/* ---------- Why Choose Us ---------- */
.why-choose-us {
    padding: 80px 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}
.why-choose-us .section-header h2 {
    color: #fff;
}
.why-choose-us .section-header p {
    color: rgba(255,255,255,0.7);
}
.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.why-card {
    background: rgba(255,255,255,0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
}
.why-card:hover {
    background: rgba(255,255,255,0.12);
    transform: translateY(-4px);
}
.why-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 24px;
    color: #fff;
}
.why-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 12px;
}
.why-card p {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    line-height: 1.6;
}

/* ---------- Resource Lead Section ---------- */
.resource-lead {
    padding: 80px 0;
    background: var(--bg-section);
}
.resource-content {
    display: flex;
    gap: 48px;
    align-items: center;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--shadow-md);
}
.resource-text {
    flex: 1;
}
.resource-text h2 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}
.resource-text > p {
    font-size: 15px;
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.6;
}
.resource-features {
    list-style: none;
    padding: 0;
    margin: 0;
}
.resource-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 15px;
    color: var(--text-body);
}
.resource-features li i {
    color: #52c41a;
}
.resource-form {
    width: 380px;
    flex-shrink: 0;
    background: var(--bg-light);
    border-radius: var(--radius-md);
    padding: 32px;
}
.resource-form h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 20px;
    text-align: center;
}
.lead-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.lead-form input {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: border-color var(--transition);
    outline: none;
}
.lead-form input:focus {
    border-color: var(--primary);
}
.lead-form .submit-btn,
.submit-btn {
    padding: 14px 24px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.submit-btn:hover {
    background: var(--accent-dark);
}
.form-note {
    font-size: 12px;
    color: var(--text-light);
    text-align: center;
    margin-top: 12px;
}
.form-note i {
    margin-right: 4px;
}

/* ---------- FAQ Section ---------- */
.faq-section {
    padding: 80px 0;
    background: var(--bg-white);
}
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
    transition: all var(--transition);
}
.faq-item.active {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 24px;
    cursor: pointer;
    background: var(--bg-light);
    transition: background var(--transition);
}
.faq-item.active .faq-question {
    background: var(--primary-light);
}
.faq-question:hover {
    background: var(--primary-light);
}
.faq-question h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
    flex: 1;
}
.faq-question i {
    color: var(--text-muted);
    transition: transform var(--transition);
    flex-shrink: 0;
    margin-left: 12px;
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}
.faq-answer p {
    padding: 16px 24px;
    font-size: 14px;
    color: var(--text-body);
    line-height: 1.7;
    margin: 0;
}

/* ---------- Articles Grid (Knowledge Section) ---------- */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.article-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.article-image {
    position: relative;
    height: 180px;
    overflow: hidden;
}
.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.article-category {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--primary);
    color: #fff;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
}
.article-content {
    padding: 20px;
}
.article-content h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
    line-height: 1.4;
}
.article-content h3 a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}
.article-content h3 a:hover {
    color: var(--primary);
}
.article-content p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 12px;
}
.article-meta {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-light);
}
.article-views i {
    margin-right: 4px;
}

/* ---------- Header CTA ---------- */
.header-cta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
    margin-right: 12px;
    flex-shrink: 0;
}
.cta-phone {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    color: var(--text-dark);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    white-space: nowrap;
}
.cta-phone:hover {
    color: var(--primary);
    background: var(--primary-light);
}
.cta-phone i {
    color: var(--primary);
}
.cta-consult-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}
.cta-consult-btn:hover {
    background: var(--accent-dark);
    transform: translateY(-1px);
}

/* ---------- Floating Consult Buttons ---------- */
.floating-consult {
    position: fixed;
    right: 24px;
    bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 9999;
    opacity: 0;
    transform: translateX(60px);
    transition: all 0.4s ease;
    pointer-events: none;
}
.floating-consult.visible {
    opacity: 1;
    transform: translateX(0);
    pointer-events: all;
}
.float-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: #fff;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    box-shadow: var(--shadow-md);
}
.float-btn:hover {
    transform: scale(1.1);
}
.chat-btn {
    background: var(--primary);
}
.phone-btn {
    background: #52c41a;
}
.wechat-btn {
    background: #07c160;
}
.top-btn {
    background: var(--text-muted);
    width: 44px;
    height: 44px;
    font-size: 16px;
}
.pulse-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid var(--primary);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.6); opacity: 0; }
}

/* ---------- Modals (Shared) ---------- */
.wechat-modal,
.consult-modal,
.smart-popup {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}
.wechat-modal {
    background: rgba(0,0,0,0.5);
}
.consult-modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.6);
}
.consult-modal-content {
    position: relative;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    width: 460px;
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    z-index: 1;
}
.modal-close {
    position: absolute;
    top: 12px;
    right: 16px;
    background: none;
    border: none;
    font-size: 28px;
    color: var(--text-muted);
    cursor: pointer;
    z-index: 2;
    line-height: 1;
    transition: color var(--transition);
}
.modal-close:hover {
    color: var(--text-dark);
}

/* WeChat Modal */
.wechat-modal-content {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 40px;
    text-align: center;
    position: relative;
    max-width: 360px;
    box-shadow: var(--shadow-lg);
}
.wechat-modal-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 20px;
}
.qr-code-container {
    width: 200px;
    height: 200px;
    margin: 0 auto 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.qr-code-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.wechat-modal-content p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 8px;
}
.wechat-id {
    font-weight: 600;
    color: #07c160;
}

/* Consult Modal */
.modal-header {
    padding: 32px 32px 0;
    text-align: center;
}
.modal-header h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}
.modal-header p {
    font-size: 14px;
    color: var(--text-muted);
}
.consult-form {
    padding: 24px 32px;
}
.consult-form .form-group {
    margin-bottom: 16px;
}
.consult-form label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 6px;
}
.consult-form input,
.consult-form select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    outline: none;
    transition: border-color var(--transition);
    box-sizing: border-box;
}
.consult-form input:focus,
.consult-form select:focus {
    border-color: var(--primary);
}
.consult-form .submit-btn {
    width: 100%;
}
.modal-footer {
    padding: 16px 32px 24px;
    text-align: center;
    border-top: 1px solid var(--border);
}
.modal-footer p {
    font-size: 14px;
    color: var(--text-muted);
    margin: 0;
}
.modal-footer a {
    color: var(--primary);
    font-weight: 600;
    text-decoration: none;
}

/* Smart Popup */
.smart-popup {
    background: rgba(0,0,0,0.5);
}
.smart-popup-content {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 40px;
    text-align: center;
    max-width: 400px;
    position: relative;
    box-shadow: var(--shadow-lg);
    animation: popupBounce 0.4s ease;
}
@keyframes popupBounce {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); opacity: 1; }
}
.popup-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--accent), #ff9a5c);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 28px;
    color: #fff;
}
.smart-popup-content h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}
.smart-popup-content > p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 20px;
}
.popup-form {
    display: flex;
    gap: 8px;
}
.popup-form input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    outline: none;
}
.popup-form input:focus {
    border-color: var(--primary);
}
.popup-form button {
    padding: 12px 20px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background var(--transition);
}
.popup-form button:hover {
    background: var(--accent-dark);
}
.popup-note {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 12px;
}
.popup-note strong {
    color: var(--accent);
}

/* ---------- Footer Styles ---------- */
.footer {
    background: #1a1a2e;
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
}
.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    font-size: 14px;
    transition: color var(--transition);
}
.footer-col ul li a:hover {
    color: #fff;
}
.contact-info p {
    font-size: 14px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.contact-info a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
}
.contact-info a:hover {
    color: #fff;
}
.contact-info i {
    width: 16px;
    color: var(--primary);
}
.footer-qr {
    margin-top: 16px;
    text-align: center;
}
.footer-qr img {
    width: 100px;
    height: 100px;
    border-radius: var(--radius-sm);
}
.footer-qr span {
    display: block;
    font-size: 12px;
    margin-top: 6px;
    color: rgba(255,255,255,0.5);
}
/* ---------- 侧栏关键词云（tag 云，链接指向 tag 内容页） ---------- */
.sidebar-tag-cloud {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 22px;
    margin-bottom: 24px;
}
.sidebar-tag-cloud h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 14px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary);
}
.tag-cloud-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.tag-cloud-item {
    display: inline-block;
    padding: 6px 12px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: 16px;
    font-size: 13px;
    line-height: 1.4;
    color: var(--text-body);
    text-decoration: none;
    transition: all var(--transition);
}
.tag-cloud-item:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
    transform: translateY(-2px);
}
/* 云效果：字号与配色交错，层次更自然 */
.tag-cloud-item:nth-child(3n+1) { font-size: 14px; }
.tag-cloud-item:nth-child(4n+2) { font-size: 12px; }
.tag-cloud-item:nth-child(5n+3) {
    background: var(--primary-light);
    color: var(--primary);
    border-color: transparent;
}
.tag-cloud-item:nth-child(5n+3):hover { color: #fff; }
@media (max-width: 768px) {
    .sidebar-tag-cloud { padding: 18px; }
}

/* 友情链接：统一为页脚浅色，避免被全局 a{color:--primary} 或 Tailwind preflight 染成蓝色 */
.friend-links {
    padding: 18px 0;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 16px;
}
.friend-links > span {
    color: rgba(255,255,255,0.5);
    flex-shrink: 0;
}
.friend-links a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    font-size: 13px;
    transition: color var(--transition);
}
.friend-links a:hover {
    color: #fff;
}
.footer-bottom {
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}
.footer-links {
    font-size: 13px;
}
.footer-links a {
    color: rgba(255,255,255,0.5);
    text-decoration: none;
}
.footer-links a:hover {
    color: #fff;
}
.copyright p {
    font-size: 13px;
    color: rgba(255,255,255,0.4);
    margin: 0;
}
.copyright a {
    color: rgba(255,255,255,0.5);
    text-decoration: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .cases-grid,
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .why-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .service-details {
        flex-direction: column;
    }
    .service-right-col {
        width: 100%;
    }
    .resource-content {
        flex-direction: column;
    }
    .resource-form {
        width: 100%;
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-cta {
        display: none;
    }
    .hero {
        min-height: 400px;
    }
    .hero-content {
        padding: 60px 20px 50px;
    }
    .hero-slider .slide h1,
    .hero-slider .slide h2 {
        font-size: 26px;
    }
    .hero-slider .slide p {
        font-size: 15px;
    }
    .hero-cta-group {
        flex-direction: column;
    }
    .cta-primary-btn,
    .cta-secondary-btn {
        justify-content: center;
        padding: 14px 24px;
    }
    .cta-secondary-index-btn {
        justify-content: center;
        padding: 14px 24px;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .stat-number {
        font-size: 36px;
    }
    .section-header h2 {
        font-size: 24px;
    }
    .cases-grid,
    .articles-grid {
        grid-template-columns: 1fr;
    }
    .service-tabs {
        flex-wrap: wrap;
    }
    .tab-button {
        padding: 10px 16px;
        font-size: 13px;
    }
    .why-grid {
        grid-template-columns: 1fr;
    }
    .resource-content {
        padding: 24px;
    }
    .popup-form {
        flex-direction: column;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .floating-consult {
        right: 16px;
        bottom: 16px;
    }
    .float-btn {
        width: 46px;
        height: 46px;
        font-size: 18px;
    }
    .consult-modal-content {
        width: 95vw;
    }
    .modal-header,
    .consult-form {
        padding-left: 20px;
        padding-right: 20px;
    }
}

@media (max-width: 480px) {
    .hero-slider .slide h1,
    .hero-slider .slide h2 {
        font-size: 22px;
    }
    .stat-number {
        font-size: 28px;
    }
    .stat-label {
        font-size: 13px;
    }
    .service-price-tag {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    .service-buttons {
        flex-direction: column;
    }
    .service-btn {
        justify-content: center;
    }
}




/* ============================================
   导航子栏目显示修复 - 针对80tg.com实际结构
   ============================================ */

/* 兼容各种可能的下拉菜单结构 */
.nav-links-desktop li {
    position: relative;
}

/* 方案A：如果子栏目是 <ul class="dropdown"> */
.nav-links-desktop li.has-dropdown .dropdown,
.nav-links-desktop li .dropdown {
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
}

/* 鼠标悬停顶级栏目时显示子栏目 */
.nav-links-desktop li.has-dropdown:hover .dropdown,
.nav-links-desktop li:hover .dropdown {
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateY(0) !important;
}

/* 方案B：如果子栏目是普通 <ul> 没有dropdown类 */
.nav-links-desktop li ul {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-white);
    min-width: 180px;
    box-shadow: var(--shadow-md);
    border-radius: var(--radius-sm);
    padding: 8px 0;
    margin: 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1001;
}

.nav-links-desktop li:hover > ul {
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateY(0) !important;
}

/* 子栏目链接样式 */
.nav-links-desktop li ul li a,
.dropdown li a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--text-body);
    text-decoration: none;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--bg-light);
}

.nav-links-desktop li ul li:last-child a,
.dropdown li:last-child a {
    border-bottom: none;
}

.nav-links-desktop li ul li a:hover,
.dropdown li a:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* 确保下拉菜单在header之上 */
.header {
    overflow: visible !important;
}

/* 桌面端确保悬停区域不中断 */
@media (min-width: 769px) {
    .nav-links-desktop li.has-dropdown {
        padding-bottom: 10px; /* 增加悬停缓冲区 */
        margin-bottom: -10px; /* 补偿布局偏移 */
    }
}



/* 补充网格布局样式（现有CSS缺失的部分） */
.advantage-grid, .service-grid, .case-grid { 
    display: grid; 
    grid-template-columns: repeat(3, 1fr); 
    gap: 20px; 
    margin-bottom: 40px; 
}
.achievement-grid { 
    display: grid; 
    grid-template-columns: repeat(4, 1fr); 
    gap: 20px; 
    max-width: 900px; 
    margin: 0 auto 40px; 
}
.process-steps { 
    display: grid; 
    grid-template-columns: repeat(4, 1fr); 
    gap: 20px; 
    max-width: 1000px; 
    margin: 0 auto 40px; 
}
.advantage-item, .service-item, .case-item { 
    background: var(--bg-light); 
    border: 1px solid var(--border); 
    border-radius: var(--radius-md); 
    padding: 24px; 
    transition: all var(--transition); 
}
.advantage-item:hover, .service-item:hover, .case-item:hover { 
    box-shadow: var(--shadow-md); 
    transform: translateY(-3px); 
}
section h3 { margin: 20px 0 10px; }
section ul { padding-left: 20px; margin-bottom: 20px; }
section ul li { margin: 6px 0; line-height: 1.7; }
@media (max-width: 768px) {
    .advantage-grid, .service-grid, .case-grid, 
    .achievement-grid, .process-steps { grid-template-columns: 1fr; }
}