/* ===========================
   QuickQ - 主样式文件
   =========================== */

/* CSS变量 */
:root {
    --primary: #3B82F6;
    --primary-dark: #2563EB;
    --secondary: #7C3AED;
    --accent-orange: #F97316;
    --accent-green: #22C55E;
    --text-dark: #1E293B;
    --text-gray: #64748B;
    --text-light: #94A3B8;
    --bg-white: #FFFFFF;
    --bg-light: #F8FAFF;
    --bg-card: #FFFFFF;
    --gradient-hero: linear-gradient(135deg, #3B82F6 0%, #7C3AED 100%);
    --gradient-blue: linear-gradient(135deg, #60A5FA 0%, #818CF8 100%);
    --gradient-cta: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(59,130,246,0.12);
    --shadow-lg: 0 8px 32px rgba(59,130,246,0.18);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s ease;
}

/* 重置样式 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-dark);
    background: var(--bg-white);
    line-height: 1.6;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===========================
   导航栏
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(59,130,246,0.08);
    transition: var(--transition);
}
.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}
.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    gap: 24px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.logo-text {
    font-size: 1.6rem;
    font-weight: 700;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
}
.nav-link {
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-gray);
    transition: var(--transition);
}
.nav-link:hover, .nav-link.active {
    color: var(--primary);
    background: rgba(59,130,246,0.06);
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    white-space: nowrap;
}
.btn-download {
    background: var(--accent-green);
    color: #fff;
    box-shadow: 0 4px 14px rgba(34,197,94,0.35);
}
.btn-download:hover {
    background: #16A34A;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(34,197,94,0.45);
}
.btn-subscribe {
    background: var(--accent-orange);
    color: #fff;
    box-shadow: 0 4px 14px rgba(249,115,22,0.35);
}
.btn-subscribe:hover {
    background: #EA580C;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(249,115,22,0.45);
}
.btn-primary {
    background: var(--gradient-hero);
    color: #fff;
    padding: 14px 36px;
    font-size: 1rem;
    box-shadow: 0 6px 20px rgba(59,130,246,0.4);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 28px rgba(59,130,246,0.5);
}
.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.7);
    padding: 12px 32px;
    font-size: 1rem;
}
.btn-outline:hover {
    background: rgba(255,255,255,0.15);
    border-color: #fff;
}
.btn-white {
    background: #fff;
    color: var(--primary);
    padding: 14px 40px;
    font-size: 1rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}
.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(0,0,0,0.2);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}
.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}
.mobile-menu {
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 16px 0;
    border-top: 1px solid rgba(0,0,0,0.06);
}
.mobile-menu.open { display: flex; }

/* ===========================
   Hero区域
   =========================== */
.hero {
    position: relative;
    min-height: 100vh;
    background: var(--gradient-hero);
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 200%;
    background: radial-gradient(ellipse, rgba(255,255,255,0.08) 0%, transparent 70%);
    pointer-events: none;
}
.hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 60px;
    position: relative;
    z-index: 1;
}
.hero-content { color: #fff; }
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 50px;
    padding: 6px 16px;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 20px;
    backdrop-filter: blur(8px);
}
.hero-badge i { color: #FCD34D; }
.hero-title {
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}
.hero-features {
    margin: 24px 0 36px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.hero-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1rem;
    color: rgba(255,255,255,0.92);
}
.hero-feature i {
    width: 20px;
    color: #86EFAC;
    font-size: 0.9rem;
    flex-shrink: 0;
}
.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}
.phone-mockup-group {
    position: relative;
    width: 100%;
    max-width: 420px;
}
.phone-mockup {
    background: #fff;
    border-radius: 32px;
    box-shadow: 0 24px 64px rgba(0,0,0,0.25);
    overflow: hidden;
    position: relative;
}
.phone-main {
    width: 200px;
    margin: 0 auto;
    z-index: 2;
    position: relative;
}
.phone-secondary {
    width: 180px;
    position: absolute;
    right: 0;
    top: 30px;
    z-index: 1;
    opacity: 0.9;
}
.phone-screen {
    background: linear-gradient(160deg, #EFF6FF 0%, #F0F4FF 100%);
    padding: 20px 16px;
    min-height: 360px;
}
.phone-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.phone-logo { font-size: 0.8rem; font-weight: 700; color: var(--primary); }
.phone-icon { width: 28px; height: 28px; background: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.phone-icon i { color: #fff; font-size: 0.7rem; }
.phone-power-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-hero);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 20px auto;
    box-shadow: 0 0 0 12px rgba(59,130,246,0.12), 0 0 0 24px rgba(59,130,246,0.06);
    animation: pulse 2s infinite;
}
.phone-power-btn i { color: #fff; font-size: 1.8rem; }
@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 12px rgba(59,130,246,0.12), 0 0 0 24px rgba(59,130,246,0.06); }
    50% { box-shadow: 0 0 0 16px rgba(59,130,246,0.08), 0 0 0 32px rgba(59,130,246,0.03); }
}
.phone-status {
    text-align: center;
    font-size: 0.7rem;
    color: var(--accent-green);
    font-weight: 600;
    margin-bottom: 16px;
}
.phone-server-list { display: flex; flex-direction: column; gap: 6px; }
.phone-server-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    border-radius: 8px;
    padding: 8px 10px;
    font-size: 0.72rem;
    color: var(--text-dark);
}
.server-flag { width: 18px; height: 12px; border-radius: 2px; flex-shrink: 0; }
.server-name { flex: 1; font-weight: 500; }
.server-speed { color: var(--accent-green); font-size: 0.65rem; }
.phone-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 8px 0; }
.phone-grid-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    background: #fff;
    border-radius: 8px;
    padding: 8px 4px;
}
.grid-icon { width: 28px; height: 18px; border-radius: 3px; }
.grid-label { font-size: 0.6rem; color: var(--text-gray); text-align: center; }

/* 波浪分隔 */
.wave-divider {
    position: relative;
    height: 80px;
    overflow: hidden;
    margin-top: -2px;
}
.wave-divider svg { position: absolute; bottom: 0; width: 100%; }

/* ===========================
   特性区域
   =========================== */
.features {
    padding: 100px 0;
    background: var(--bg-white);
}
.section-header {
    text-align: center;
    margin-bottom: 60px;
}
.section-title {
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
    letter-spacing: -0.3px;
}
.section-subtitle {
    font-size: 1rem;
    color: var(--text-gray);
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.7;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.feature-card {
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    transition: var(--transition);
    border: 1px solid rgba(59,130,246,0.06);
    position: relative;
    overflow: hidden;
}
.feature-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient-hero);
    opacity: 0;
    transition: var(--transition);
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(59,130,246,0.15);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.6rem;
}
.feature-icon.blue { background: linear-gradient(135deg, #DBEAFE, #EDE9FE); color: var(--primary); }
.feature-icon.purple { background: linear-gradient(135deg, #EDE9FE, #FCE7F3); color: var(--secondary); }
.feature-icon.orange { background: linear-gradient(135deg, #FEF3C7, #FEE2E2); color: #F59E0B; }
.feature-icon.green { background: linear-gradient(135deg, #DCFCE7, #D1FAE5); color: #059669; }
.feature-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}
.feature-desc {
    font-size: 0.9rem;
    color: var(--text-gray);
    line-height: 1.7;
}

/* ===========================
   全球服务器地图
   =========================== */
.servers {
    padding: 100px 0;
    background: var(--bg-light);
}
.world-map-container {
    position: relative;
    margin-top: 48px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #fff;
    box-shadow: var(--shadow-md);
    padding: 40px;
}
.world-map-svg {
    width: 100%;
    height: auto;
    display: block;
}
.server-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}
.stat-item {
    text-align: center;
    padding: 24px;
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}
.stat-number {
    font-size: 2.4rem;
    font-weight: 700;
    background: var(--gradient-hero);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 6px;
}
.stat-label {
    font-size: 0.9rem;
    color: var(--text-gray);
}

/* ===========================
   用户评价
   =========================== */
.testimonials {
    padding: 100px 0;
    background: var(--bg-white);
}
.testimonials-wrapper {
    position: relative;
    margin-top: 48px;
}
.testimonials-track {
    display: flex;
    gap: 24px;
    overflow: hidden;
}
.testimonial-slide {
    display: flex;
    gap: 24px;
    width: 100%;
    flex-shrink: 0;
    transition: transform 0.5s ease;
}
.testimonial-card {
    flex: 1;
    background: var(--gradient-cta);
    border-radius: var(--radius-lg);
    padding: 32px;
    color: #fff;
    position: relative;
    overflow: hidden;
}
.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -10px;
    right: 20px;
    font-size: 8rem;
    font-family: Georgia, serif;
    color: rgba(255,255,255,0.1);
    line-height: 1;
}
.testimonial-stars {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
}
.testimonial-stars i { color: #FCD34D; font-size: 0.85rem; }
.testimonial-text {
    font-size: 0.95rem;
    line-height: 1.7;
    color: rgba(255,255,255,0.92);
    margin-bottom: 20px;
}
.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
}
.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
    overflow: hidden;
}
.author-avatar img { width: 100%; height: 100%; object-fit: cover; }
.author-name { font-weight: 600; font-size: 0.95rem; }
.author-location { font-size: 0.8rem; color: rgba(255,255,255,0.7); }
.testimonials-nav {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    margin-top: 32px;
}
.nav-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-light);
    border: 1px solid rgba(59,130,246,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    color: var(--primary);
    font-size: 1rem;
}
.nav-btn:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.nav-dots {
    display: flex;
    gap: 8px;
}
.nav-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}
.nav-dot.active {
    background: var(--primary);
    width: 24px;
    border-radius: 4px;
}

/* ===========================
   帮助中心/博客
   =========================== */
.help-center {
    padding: 100px 0;
    background: var(--bg-light);
}
.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}
.article-card {
    background: #fff;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.04);
}
.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}
.article-thumb {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: var(--gradient-blue);
    display: flex;
    align-items: center;
    justify-content: center;
}
.article-thumb-placeholder {
    width: 100%;
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: rgba(255,255,255,0.7);
}
.article-body { padding: 20px; }
.article-tag {
    display: inline-block;
    background: rgba(59,130,246,0.08);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 50px;
    margin-bottom: 10px;
}
.article-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.5;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-excerpt {
    font-size: 0.85rem;
    color: var(--text-gray);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
}
.article-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
}
.article-link:hover { gap: 10px; }
.article-link i { font-size: 0.75rem; }

/* ===========================
   CTA区域
   =========================== */
.cta-section {
    padding: 80px 0;
    background: var(--gradient-cta);
    position: relative;
    overflow: hidden;
    text-align: center;
}
.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -10%;
    width: 60%;
    height: 200%;
    background: radial-gradient(ellipse, rgba(255,255,255,0.06) 0%, transparent 70%);
}
.cta-section::after {
    content: '';
    position: absolute;
    bottom: -50%;
    right: -10%;
    width: 50%;
    height: 200%;
    background: radial-gradient(ellipse, rgba(255,255,255,0.04) 0%, transparent 70%);
}
.cta-content { position: relative; z-index: 1; }
.cta-title {
    font-size: clamp(1.4rem, 2.5vw, 2rem);
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}
.cta-subtitle {
    font-size: 1rem;
    color: rgba(255,255,255,0.8);
    margin-bottom: 32px;
}

/* ===========================
   页脚
   =========================== */
.footer {
    background: #0F172A;
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-apps h4, .footer-col h4 {
    color: #fff;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
}
.app-icons {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}
.app-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    color: rgba(255,255,255,0.7);
    transition: var(--transition);
    min-width: 100px;
}
.app-icon i { font-size: 2.3rem; }
.app-icon span { font-size: 1rem; text-align: center; }
.app-icon:hover { color: #fff; }
.footer-links {
    display: flex;
    gap: 48px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a {
    font-size: 1rem;
    color: rgba(255,255,255,0.6);
    transition: var(--transition);
}
.footer-col ul li a:hover { color: #fff; }
.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 1rem;
    color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-bottom a:hover { color: rgba(255,255,255,0.8); }

/* ===========================
   帮助中心页
   =========================== */
.page-hero {
    background: var(--gradient-hero);
    padding: 140px 0 80px;
    text-align: center;
    color: #fff;
}
.page-hero-title {
    font-size: clamp(1.8rem, 3.5vw, 2.8rem);
    font-weight: 700;
    margin-bottom: 12px;
}
.page-hero-subtitle {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.85);
    max-width: 480px;
    margin: 0 auto;
}
.search-bar {
    display: flex;
    max-width: 520px;
    margin: 32px auto 0;
    background: #fff;
    border-radius: 50px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,0.15);
}
.search-bar input {
    flex: 1;
    padding: 14px 20px;
    border: none;
    outline: none;
    font-size: 0.95rem;
    color: var(--text-dark);
    font-family: inherit;
}
.search-bar button {
    padding: 14px 24px;
    background: var(--gradient-hero);
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}
.search-bar button:hover { opacity: 0.9; }
.help-content {
    padding: 80px 0;
    background: var(--bg-light);
}
.articles-grid-large {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

/* ===========================
   文章详情页
   =========================== */
.article-detail {
    padding: 80px 0;
    background: var(--bg-light);
}
.article-detail-inner {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    align-items: start;
}
.article-main {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 40px;
    box-shadow: var(--shadow-sm);
}
.article-main h1 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
    line-height: 1.3;
}
.article-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    color: var(--text-gray);
    font-size: 0.85rem;
    margin-bottom: 28px;
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(0,0,0,0.06);
}
.article-meta i { color: var(--primary); }
.article-body-content {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-dark);
}
.article-body-content h2 {
    font-size: 1.3rem;
    font-weight: 700;
    margin: 28px 0 12px;
    color: var(--text-dark);
}
.article-body-content p { margin-bottom: 16px; }
.article-sidebar {
    position: sticky;
    top: 88px;
}
.sidebar-card {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 24px;
}
.sidebar-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(0,0,0,0.06);
}
.sidebar-article {
    display: flex;
    gap: 12px;
    padding: 10px 0;
    border-bottom: 1px solid rgba(0,0,0,0.04);
    transition: var(--transition);
}
.sidebar-article:last-child { border-bottom: none; }
.sidebar-article:hover .sidebar-article-title { color: var(--primary); }
.sidebar-article-img {
    width: 60px;
    height: 45px;
    border-radius: 6px;
    object-fit: cover;
    flex-shrink: 0;
    background: var(--gradient-blue);
}
.sidebar-article-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-dark);
    line-height: 1.4;
    transition: var(--transition);
}

/* ===========================
   FAQ 常见问题
   =========================== */
.faq-section {
    padding: 80px 0;
    background: var(--bg-light);
}
.faq-container {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
.faq-item {
    background: #fff;
    border: 2px solid rgba(59, 130, 246, 0.1);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}
.faq-item:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.1);
}
.faq-question {
    width: 100%;
    padding: 20px 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    transition: var(--transition);
    text-align: left;
}
.faq-question:hover {
    color: var(--primary);
}
.faq-question i {
    color: var(--primary);
    transition: transform 0.3s ease;
    font-size: 0.9rem;
}
.faq-item.active .faq-question i {
    transform: rotate(180deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: rgba(59, 130, 246, 0.02);
}
.faq-item.active .faq-answer {
    max-height: 500px;
}
.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-gray);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===========================
   响应式设计
   =========================== */
@media (max-width: 1024px) {
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .articles-grid, .articles-grid-large { grid-template-columns: repeat(2, 1fr); }
    .article-detail-inner { grid-template-columns: 1fr; }
    .article-sidebar { position: static; }
}

@media (max-width: 768px) {
    .nav-links, .nav-actions { display: none; }
    .mobile-menu-btn { display: flex; }
    .hero-inner { grid-template-columns: 1fr; text-align: center; gap: 40px; }
    .hero-visual { display: none; }
    .hero-actions { justify-content: center; }
    .hero-feature { justify-content: left; }
    .features-grid { grid-template-columns: 1fr; }
    .server-stats { grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .testimonial-slide { flex-direction: column; }
    .articles-grid, .articles-grid-large { grid-template-columns: 1fr; }
    .footer-inner { flex-direction: column; gap: 32px; }
    .footer-links { flex-direction: column; gap: 24px; }
    .world-map-container { padding: 20px; }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .server-stats { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; align-items: center; }
    .btn-primary, .btn-outline { width: 100%; max-width: 280px; }
}

/* ===========================
   动画
   =========================== */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}
.animate-fadeInUp { animation: fadeInUp 0.6s ease forwards; }
.animate-float { animation: float 4s ease-in-out infinite; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }

/* 滚动动画 */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.pagination {
    display: block;
    text-align: center;
    margin-top: 50px;
    padding-bottom: 10px;
}

.pagination a {
    display: inline-block;
    padding: 7px 8px;
    margin-left: 5px;
    margin-bottom: 5px;
    color: #999;
    line-height: 1;
    background-color: #f2f2f2;
    box-shadow: inset 0 -1px 0 0 rgba(0, 0, 0, .05);
    border-radius: 2px;
    overflow: hidden;
    transition: all .2s ease-in-out;
    vertical-align: top;
}

.pagination a:hover {
    background-color: #1abc9c; 
}