/* ===================================
   IDM官网模板 - 全局样式
   Internet Download Manager 中文官网
   =================================== */

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

:root {
    --primary-color: #0d7a5f;
    --primary-dark: #095c47;
    --primary-light: #1aab84;
    --accent-green: #2ecc71;
    --accent-teal: #1abc9c;
    --dark-bg: #0a1628;
    --dark-bg2: #0d1f3c;
    --dark-bg3: #112240;
    --text-white: #ffffff;
    --text-light: #ccd6f6;
    --text-muted: #8892b0;
    --border-color: #1e3a5f;
    --card-bg: #0d1f3c;
    --font-main: 'Microsoft YaHei', '微软雅黑', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    --transition: all 0.3s ease;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.5);
}

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

body {
    font-family: var(--font-main);
    background-color: var(--dark-bg);
    color: var(--text-light);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

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

ul, ol {
    list-style: none;
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-white);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

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

.section {
    padding: 80px 0;
}

.section-sm {
    padding: 50px 0;
}

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

.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.grid {
    display: grid;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); gap: 30px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); gap: 30px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-green), var(--primary-color));
    color: #fff;
    border-color: var(--accent-green);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--accent-green));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(46, 204, 113, 0.4);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--accent-green);
    border-color: var(--accent-green);
}

.btn-outline:hover {
    background: var(--accent-green);
    color: #fff;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: rgba(255,255,255,0.2);
    color: #fff;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.1rem;
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.9rem;
}

/* ===================================
   Header / Navigation
   =================================== */
#header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

#header.scrolled {
    background: rgba(10, 22, 40, 0.99);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    padding: 0 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.logo img {
    height: 40px;
    width: auto;
}

.logo-text {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-white);
    line-height: 1.2;
}

.logo-text span {
    display: block;
    font-size: 0.75rem;
    color: var(--accent-teal);
    font-weight: 400;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-menu a {
    padding: 8px 14px;
    color: var(--text-light);
    font-size: 0.95rem;
    border-radius: 4px;
    transition: var(--transition);
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--accent-green);
    background: rgba(46, 204, 113, 0.1);
}

.nav-menu .has-dropdown {
    position: relative;
}

.nav-menu .dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--dark-bg2);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    min-width: 160px;
    box-shadow: var(--shadow);
    z-index: 100;
}

.nav-menu .has-dropdown:hover .dropdown {
    display: block;
}

.nav-menu .dropdown a {
    display: block;
    padding: 10px 16px;
    border-radius: 0;
    border-bottom: 1px solid var(--border-color);
}

.nav-menu .dropdown a:last-child {
    border-bottom: none;
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 5px;
}

/* ===================================
   Hero / Slider Section
   =================================== */
.hero-slider {
    position: relative;
    height: 600px;
    overflow: hidden;
    margin-top: 70px;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.8s ease;
    background-size: cover;
    background-position: center;
}

.slide.active {
    opacity: 1;
}

.slide-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(10,22,40,0.85) 0%, rgba(10,22,40,0.5) 100%);
}

.slide-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 0 60px;
    max-width: 700px;
}

.slide-content h1,
.slide-content h2 {
    font-size: 3rem;
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.slide-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--text-light);
}

.slide-btns {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.slide-meta {
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.slider-controls {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.slider-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.slider-dot.active {
    background: var(--accent-green);
    transform: scale(1.3);
}

.slider-prev,
.slider-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    color: #fff;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
    font-size: 1.2rem;
}

.slider-prev { left: 20px; }
.slider-next { right: 20px; }

.slider-prev:hover,
.slider-next:hover {
    background: var(--accent-green);
    border-color: var(--accent-green);
}

/* ===================================
   Section Headers
   =================================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.2rem;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(to right, var(--accent-green), var(--accent-teal));
    margin: 12px auto 0;
    border-radius: 2px;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   Feature Cards
   =================================== */
.features-section {
    background: var(--dark-bg2);
}

.feature-card {
    background: var(--dark-bg3);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 35px 25px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(to right, var(--accent-green), var(--accent-teal));
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent-teal);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-teal));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: #fff;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
    color: var(--text-white);
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin: 0;
}

/* ===================================
   Product Intro Section
   =================================== */
.product-intro {
    background: var(--dark-bg);
}

.product-intro-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-intro-content h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--accent-teal);
}

.product-intro-content h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.product-intro-content p {
    color: var(--text-muted);
    margin-bottom: 15px;
    line-height: 1.8;
}

.product-intro-img {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

/* ===================================
   Stats / Numbers Section
   =================================== */
.stats-section {
    background: linear-gradient(135deg, var(--primary-dark), var(--dark-bg2));
    padding: 60px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item h3 {
    font-size: 2.8rem;
    color: var(--accent-green);
    margin-bottom: 8px;
}

.stat-item p {
    color: var(--text-light);
    font-size: 1rem;
    margin: 0;
}

/* ===================================
   Trial CTA Section
   =================================== */
.trial-section {
    background: var(--dark-bg3);
    text-align: center;
    padding: 80px 0;
}

.trial-section h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--accent-green);
}

.trial-section p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 35px;
}

.trial-btns {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   News / Blog List
   =================================== */
.news-section {
    background: var(--dark-bg2);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.news-card {
    background: var(--dark-bg3);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    transition: var(--transition);
}

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

.news-card-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.news-card-body {
    padding: 20px;
}

.news-card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.news-card-meta .tag {
    background: rgba(46, 204, 113, 0.15);
    color: var(--accent-green);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.news-card h3 {
    font-size: 1.05rem;
    margin-bottom: 10px;
    line-height: 1.5;
}

.news-card h3 a {
    color: var(--text-white);
}

.news-card h3 a:hover {
    color: var(--accent-green);
}

.news-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-footer {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.read-more {
    font-size: 0.9rem;
    color: var(--accent-teal);
    display: flex;
    align-items: center;
    gap: 5px;
}

.read-more:hover {
    color: var(--accent-green);
}

/* ===================================
   Footer
   =================================== */
#footer {
    background: #060e1c;
    border-top: 1px solid var(--border-color);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 15px;
}

.footer-brand p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-col h4 {
    font-size: 1rem;
    color: var(--text-white);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

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

.footer-col ul li a {
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--accent-green);
    padding-left: 5px;
}

.footer-newsletter {
    display: flex;
    gap: 0;
    margin-top: 10px;
}

.footer-newsletter input {
    flex: 1;
    padding: 10px 15px;
    background: var(--dark-bg3);
    border: 1px solid var(--border-color);
    border-right: none;
    border-radius: 4px 0 0 4px;
    color: var(--text-white);
    font-size: 0.9rem;
    outline: none;
}

.footer-newsletter input::placeholder {
    color: var(--text-muted);
}

.footer-newsletter button {
    padding: 10px 18px;
    background: var(--accent-green);
    border: none;
    border-radius: 0 4px 4px 0;
    color: #fff;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-newsletter button:hover {
    background: var(--primary-light);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 10px;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin: 0;
}

.footer-bottom a {
    color: var(--text-muted);
    font-size: 0.85rem;
}

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

.footer-links {
    display: flex;
    gap: 20px;
}

/* ===================================
   Breadcrumb
   =================================== */
.breadcrumb {
    background: var(--dark-bg2);
    padding: 12px 0;
    margin-top: 70px;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumb-inner {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

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

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

.breadcrumb-inner .separator {
    color: var(--border-color);
}

.breadcrumb-inner .current {
    color: var(--text-light);
}

/* ===================================
   Page Header (Inner Pages)
   =================================== */
.page-header {
    background: linear-gradient(135deg, var(--dark-bg2), var(--dark-bg3));
    padding: 60px 0;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.2rem;
    margin-bottom: 12px;
}

.page-header p {
    color: var(--text-muted);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   List Page
   =================================== */
.list-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    padding: 50px 0;
}

.article-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.article-item {
    background: var(--dark-bg2);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    gap: 0;
    transition: var(--transition);
}

.article-item:hover {
    border-color: var(--accent-teal);
    box-shadow: var(--shadow);
    transform: translateX(3px);
}

.article-item-img {
    width: 220px;
    flex-shrink: 0;
    overflow: hidden;
}

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

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

.article-item-body {
    padding: 20px 25px;
    flex: 1;
}

.article-item-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.article-item-meta .cat-tag {
    background: rgba(26, 171, 132, 0.15);
    color: var(--accent-teal);
    padding: 2px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
}

.article-item h2 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.article-item h2 a {
    color: var(--text-white);
    transition: var(--transition);
}

.article-item h2 a:hover {
    color: var(--accent-green);
}

.article-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===================================
   Pagination
   =================================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 6px;
    background: var(--dark-bg2);
    border: 1px solid var(--border-color);
    color: var(--text-light);
    font-size: 0.9rem;
    transition: var(--transition);
}

.pagination a:hover,
.pagination .current {
    background: var(--accent-green);
    border-color: var(--accent-green);
    color: #fff;
}

/* ===================================
   Sidebar
   =================================== */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.sidebar-widget {
    background: var(--dark-bg2);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 25px;
}

.sidebar-widget h3 {
    font-size: 1.05rem;
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-white);
}

.sidebar-widget h3::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 16px;
    background: var(--accent-green);
    margin-right: 8px;
    border-radius: 2px;
    vertical-align: middle;
}

.sidebar-list li {
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
}

.sidebar-list li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.sidebar-list li a {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    transition: var(--transition);
}

.sidebar-list li a:hover {
    color: var(--accent-green);
}

.sidebar-list li a::before {
    content: '›';
    color: var(--accent-teal);
    font-size: 1.1rem;
    flex-shrink: 0;
    margin-top: -1px;
}

.sidebar-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.sidebar-tags a {
    padding: 4px 12px;
    background: var(--dark-bg3);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: var(--transition);
}

.sidebar-tags a:hover {
    background: rgba(46, 204, 113, 0.15);
    border-color: var(--accent-green);
    color: var(--accent-green);
}

/* ===================================
   Article / Content Page
   =================================== */
.article-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    padding: 50px 0;
}

.article-main {
    background: var(--dark-bg2);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 35px;
}

.article-header {
    margin-bottom: 30px;
    padding-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
}

.article-header h1 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    line-height: 1.4;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.article-meta .cat-link {
    background: rgba(46, 204, 113, 0.15);
    color: var(--accent-green);
    padding: 3px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

.article-featured-img {
    width: 100%;
    border-radius: 8px;
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
}

.article-content {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--text-light);
}

.article-content h2 {
    font-size: 1.5rem;
    margin: 30px 0 15px;
    color: var(--text-white);
    padding-left: 12px;
    border-left: 3px solid var(--accent-green);
}

.article-content h3 {
    font-size: 1.2rem;
    margin: 25px 0 12px;
    color: var(--accent-teal);
}

.article-content p {
    margin-bottom: 18px;
    color: var(--text-light);
}

.article-content ul,
.article-content ol {
    margin: 15px 0 20px 20px;
    list-style: disc;
}

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

.article-content li {
    margin-bottom: 8px;
    color: var(--text-muted);
}

.article-content a {
    color: var(--accent-teal);
    text-decoration: underline;
}

.article-content blockquote {
    background: var(--dark-bg3);
    border-left: 4px solid var(--accent-green);
    padding: 15px 20px;
    margin: 20px 0;
    border-radius: 0 6px 6px 0;
    color: var(--text-muted);
    font-style: italic;
}

.article-content img {
    border-radius: 8px;
    margin: 15px 0;
    border: 1px solid var(--border-color);
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 0.95rem;
}

.article-content th {
    background: var(--dark-bg3);
    padding: 12px 15px;
    text-align: left;
    color: var(--text-white);
    border: 1px solid var(--border-color);
}

.article-content td {
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
}

.article-content tr:nth-child(even) td {
    background: rgba(255,255,255,0.02);
}

.article-tags {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.article-tags span {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.article-tags a {
    padding: 4px 12px;
    background: var(--dark-bg3);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: var(--transition);
}

.article-tags a:hover {
    border-color: var(--accent-green);
    color: var(--accent-green);
}

/* Related Articles */
.related-articles {
    margin-top: 30px;
    padding: 25px;
    background: var(--dark-bg3);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.related-articles h3 {
    font-size: 1.1rem;
    margin-bottom: 18px;
    color: var(--text-white);
}

.related-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.related-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.related-item img {
    width: 80px;
    height: 55px;
    object-fit: cover;
    border-radius: 4px;
    flex-shrink: 0;
}

.related-item-info h4 {
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.related-item-info h4 a {
    color: var(--text-light);
}

.related-item-info h4 a:hover {
    color: var(--accent-green);
}

.related-item-info span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===================================
   Download Page
   =================================== */
.download-hero {
    background: linear-gradient(135deg, var(--dark-bg2), var(--dark-bg3));
    padding: 80px 0;
    text-align: center;
}

.download-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.download-hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 35px;
}

.download-main-btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 45px;
    background: linear-gradient(135deg, var(--accent-green), var(--primary-color));
    color: #fff;
    border-radius: 8px;
    font-size: 1.2rem;
    font-weight: 700;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    text-decoration: none;
    box-shadow: 0 4px 20px rgba(46, 204, 113, 0.4);
}

.download-main-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(46, 204, 113, 0.6);
    color: #fff;
}

.download-meta {
    margin-top: 20px;
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

.download-meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.download-meta-item .icon {
    color: var(--accent-teal);
    font-size: 1.1rem;
}

.download-options {
    padding: 60px 0;
    background: var(--dark-bg2);
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.download-card {
    background: var(--dark-bg3);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.download-card.featured {
    border-color: var(--accent-green);
    box-shadow: 0 0 20px rgba(46, 204, 113, 0.2);
}

.download-card.featured::before {
    content: '推荐';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent-green);
    color: #fff;
    padding: 3px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.download-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.download-card .price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-green);
    margin: 15px 0;
}

.download-card .price span {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 400;
}

.download-card ul {
    margin: 20px 0;
    text-align: left;
}

.download-card ul li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 8px;
}

.download-card ul li::before {
    content: '✓';
    color: var(--accent-green);
    font-weight: 700;
    flex-shrink: 0;
}

.download-card ul li:last-child {
    border-bottom: none;
}

/* ===================================
   FAQ Section
   =================================== */
.faq-section {
    padding: 60px 0;
    background: var(--dark-bg);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--dark-bg2);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 12px;
    overflow: hidden;
}

.faq-question {
    padding: 18px 22px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
    color: var(--text-white);
    transition: var(--transition);
    user-select: none;
}

.faq-question:hover {
    color: var(--accent-green);
}

.faq-question .faq-icon {
    font-size: 1.2rem;
    transition: var(--transition);
    color: var(--accent-teal);
    flex-shrink: 0;
}

.faq-item.open .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    display: none;
    padding: 0 22px 18px;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.8;
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
}

.faq-item.open .faq-answer {
    display: block;
}

/* ===================================
   System Requirements Table
   =================================== */
.sys-req-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.sys-req-table th {
    background: var(--dark-bg3);
    padding: 12px 18px;
    text-align: left;
    color: var(--text-white);
    border: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.sys-req-table td {
    padding: 12px 18px;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.sys-req-table tr:nth-child(even) td {
    background: rgba(255,255,255,0.02);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

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

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.5rem; }

    .nav-menu {
        display: none;
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--dark-bg2);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        gap: 5px;
    }

    .nav-menu.open {
        display: flex;
    }

    .nav-cta {
        display: none;
    }

    .mobile-toggle {
        display: block;
    }

    .hero-slider {
        height: 450px;
    }

    .slide-content {
        padding: 0 25px;
    }

    .slide-content h1,
    .slide-content h2 {
        font-size: 1.8rem;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .product-intro-inner {
        grid-template-columns: 1fr;
    }

    .list-layout,
    .article-layout {
        grid-template-columns: 1fr;
    }

    .sidebar {
        order: -1;
    }

    .article-item {
        flex-direction: column;
    }

    .article-item-img {
        width: 100%;
        height: 180px;
    }

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

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }

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

    .download-cards {
        grid-template-columns: 1fr;
    }

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

    .section {
        padding: 50px 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .hero-slider {
        height: 380px;
    }

    .slide-content h1,
    .slide-content h2 {
        font-size: 1.5rem;
    }

    .slide-btns {
        flex-direction: column;
    }

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

    .stat-item h3 {
        font-size: 2rem;
    }
}

/* ===================================
   Scroll to Top Button
   =================================== */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--accent-green);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.4);
}

.scroll-top.visible {
    display: flex;
}

.scroll-top:hover {
    background: var(--primary-light);
    transform: translateY(-3px);
}

/* ===================================
   Loading Animation
   =================================== */
.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===================================
   Custom Scrollbar
   =================================== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-teal);
}