/* ========================================
   快连VPN 深度评测站 - 全新样式
   ======================================== */

/* ---------- 重置 & 基础 ---------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary: #0f2b5b;       /* 深蓝 */
    --primary-light: #1e4a8a;
    --accent: #f0a500;        /* 金色点缀 */
    --text-dark: #1a1a1a;
    --text-medium: #3d4a5c;
    --text-light: #6b7a8f;
    --bg-white: #ffffff;
    --bg-soft: #f6f9fc;
    --bg-dark: #0b1d3a;
    --border-color: #e2e8f0;
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.10);
    --radius: 12px;
    --radius-lg: 20px;
    --max-width: 1200px;
    --transition: 0.25s ease;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-dark);
    background: var(--bg-white);
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 头部 ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(11, 29, 58, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.header-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 22px;
    font-weight: 700;
    color: #fff;
}

.logo-mark {
    font-size: 26px;
    line-height: 1;
}

.logo-text span {
    color: var(--accent);
}

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

.main-nav a {
    color: rgba(255,255,255,0.75);
    font-size: 15px;
    padding: 4px 0;
    border-bottom: 2px solid transparent;
}

.main-nav a:hover,
.main-nav a.active {
    color: #fff;
    border-bottom-color: var(--accent);
}

.btn-download {
    background: var(--accent);
    color: #0b1d3a;
    font-weight: 600;
    padding: 8px 20px;
    border-radius: 30px;
    font-size: 15px;
    transition: var(--transition);
}

.btn-download:hover {
    background: #e69500;
    transform: scale(1.02);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
}

/* ---------- Hero 文章横幅 ---------- */
.hero-article {
    padding: 60px 0 40px;
    background: linear-gradient(135deg, #0b1d3a 0%, #1a3a6a 100%);
    color: #fff;
}

.hero-article .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.hero-tag {
    display: inline-block;
    background: rgba(240, 165, 0, 0.2);
    color: var(--accent);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.hero-article h1 {
    font-size: 38px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.hero-sub {
    font-size: 18px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 20px;
}

.hero-meta {
    display: flex;
    gap: 24px;
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 28px;
}

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

.btn-primary {
    background: var(--accent);
    color: #0b1d3a;
    padding: 12px 28px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 16px;
    transition: var(--transition);
    border: none;
    display: inline-block;
}

.btn-primary:hover {
    background: #e69500;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(240, 165, 0, 0.3);
}

.btn-outline {
    background: transparent;
    color: #fff;
    padding: 12px 28px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 16px;
    border: 1px solid rgba(255,255,255,0.3);
    transition: var(--transition);
}

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

/* Hero 视觉（盾牌抽象） */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.visual-shield {
    width: 220px;
    height: 220px;
    background: radial-gradient(circle at 30% 30%, rgba(240,165,0,0.15), transparent 70%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.shield-inner {
    width: 160px;
    height: 160px;
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(6px);
    border: 2px solid rgba(255,255,255,0.15);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.shield-icon {
    font-size: 48px;
    margin-bottom: 8px;
}

.shield-text {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    line-height: 1.4;
}

/* ---------- 目录 ---------- */
.toc-section {
    margin: 30px auto 20px;
}

.table-of-contents {
    background: var(--bg-soft);
    padding: 20px 28px;
    border-radius: var(--radius);
    border-left: 4px solid var(--accent);
}

.toc-title {
    font-weight: 700;
    font-size: 16px;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.table-of-contents ul {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 20px;
}

.table-of-contents li a {
    font-size: 14px;
    color: var(--text-medium);
    border-bottom: 1px dashed transparent;
}

.table-of-contents li a:hover {
    color: var(--primary-light);
    border-bottom-color: var(--accent);
}

/* ---------- 内容网格 ---------- */
.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin: 40px 0 60px;
}

/* 主内容 */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.content-block h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--primary);
    border-bottom: 3px solid var(--accent);
    padding-bottom: 8px;
    display: inline-block;
}

.content-block h3 {
    font-size: 20px;
    font-weight: 600;
    margin: 24px 0 12px;
}

/* 使用指南模块 */
.guide-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 24px;
}
@media (max-width: 768px) {
    .guide-grid { grid-template-columns: 1fr; }
}
.guide-card {
    background: #fff;
    border: 1px solid var(--border-color, #e5e9f0);
    border-radius: 12px;
    padding: 22px 24px;
    transition: all .25s ease;
    border-left: 4px solid #f0a500;
}
.guide-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px rgba(15, 43, 91, 0.10);
    border-left-color: var(--primary, #0f2b5b);
}
.guide-card-head {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 14px;
    padding-bottom: 12px;
    border-bottom: 1px dashed var(--border-color, #e5e9f0);
}
.guide-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #f0a500, #ff8c00);
    color: #0b1d3a;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 16px;
}
.guide-question {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-dark, #0b1d3a);
    line-height: 1.5;
    padding-top: 4px;
}
.guide-steps {
    margin: 0;
    padding-left: 0;
    list-style: none;
    counter-reset: step;
}
.guide-steps li {
    position: relative;
    padding: 8px 0 8px 64px;
    color: var(--text-medium, #3a4a64);
    line-height: 1.75;
    font-size: 14px;
    counter-increment: step;
    border-bottom: 1px dotted rgba(15, 43, 91, 0.08);
}
.guide-steps li:last-child { border-bottom: none; }
.guide-steps li::before {
    content: "步骤 " counter(step);
    position: absolute;
    left: 0;
    top: 8px;
    background: rgba(15, 43, 91, 0.08);
    color: var(--primary, #0f2b5b);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
}
.guide-tips {
    margin-top: 12px;
    padding: 10px 14px;
    background: linear-gradient(135deg, #fff8e6, #fff);
    border-left: 3px solid #f0a500;
    border-radius: 0 6px 6px 0;
    color: #8a6a00;
    font-size: 13px;
    line-height: 1.7;
}
    color: var(--text-dark);
}

.content-block p {
    margin-bottom: 16px;
    color: var(--text-medium);
    line-height: 1.8;
}

.content-block strong {
    color: var(--primary-light);
    font-weight: 700;
}

/* 性能图表（模拟） */
.performance-chart {
    background: var(--bg-soft);
    padding: 20px 24px;
    border-radius: var(--radius);
    margin: 16px 0;
}

.chart-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.bar-label {
    width: 50px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-medium);
}

.bar-bg {
    flex: 1;
    background: #e2e8f0;
    height: 24px;
    border-radius: 12px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-light), var(--accent));
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 8px;
    font-size: 13px;
    font-weight: 700;
    color: #fff;
    border-radius: 12px;
}

/* 价格表格 */
.pricing-table-wrapper {
    overflow-x: auto;
}

.pricing-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.pricing-table th {
    background: var(--primary);
    color: #fff;
    padding: 14px 12px;
    font-weight: 600;
    text-align: left;
}

.pricing-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
}

.pricing-table tr.highlight-row {
    background: #fef9e7;
    border-left: 4px solid var(--accent);
}

.recommend {
    background: var(--accent);
    color: #0b1d3a;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 12px;
    margin-left: 8px;
}

.table-note {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 12px;
}

/* 用户评价 */
.review-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 20px 0;
}

.review-card {
    background: var(--bg-soft);
    padding: 20px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
}

.review-stars {
    color: #f5b342;
    font-size: 18px;
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.review-text {
    font-size: 15px;
    color: var(--text-medium);
    margin-bottom: 12px;
}

.review-author {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
}

.rating-summary {
    margin-top: 20px;
    padding: 16px 20px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 20px;
}

.rating-score {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
}

.rating-count {
    font-size: 15px;
    color: var(--text-medium);
}

.rating-places {
    font-size: 14px;
    color: var(--text-light);
    margin-left: auto;
}

/* FAQ 手风琴 */
.faq-accordion {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    background: var(--bg-soft);
    padding: 16px 20px;
    font-size: 16px;
    font-weight: 600;
    text-align: left;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: #e8edf3;
}

.faq-question::after {
    content: '▼';
    font-size: 14px;
    transition: transform 0.25s;
}

.faq-question[aria-expanded="true"]::after {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    padding: 0 20px;
    transition: max-height 0.35s ease, opacity 0.3s ease, padding 0.3s;
    background: #fff;
}

.faq-answer p {
    padding: 12px 0 16px;
    margin: 0;
    color: var(--text-medium);
}

/* 结尾CTA */
.final-cta {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    padding: 40px 30px;
    border-radius: var(--radius-lg);
    text-align: center;
}

.final-cta h3 {
    font-size: 26px;
    margin-bottom: 8px;
}

.final-cta p {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 24px;
}

.final-cta .btn-primary {
    background: #fff;
    color: var(--primary);
    font-size: 18px;
    padding: 14px 40px;
    border-radius: 40px;
}

.final-cta .btn-primary:hover {
    background: var(--accent);
    color: #0b1d3a;
}

/* ---------- 侧边栏 ---------- */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.sidebar-widget {
    background: var(--bg-soft);
    padding: 22px 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
}

.sidebar-widget h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 14px;
    border-bottom: 2px solid var(--accent);
    padding-bottom: 8px;
}

.sidebar-download-btn {
    display: block;
    background: #fff;
    color: var(--primary);
    padding: 10px 16px;
    border-radius: 8px;
    margin-bottom: 8px;
    font-weight: 600;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.sidebar-download-btn:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.sidebar-widget ul li {
    padding: 6px 0;
    border-bottom: 1px dashed var(--border-color);
}

.sidebar-widget ul li a {
    font-size: 14px;
    color: var(--text-medium);
}

.sidebar-widget ul li a:hover {
    color: var(--primary-light);
}

/* ---------- 页脚 ---------- */
.site-footer {
    background: var(--bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 50px 0 20px;
    margin-top: 40px;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.footer-brand {
    margin-bottom: 30px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
}

.footer-brand p {
    font-size: 14px;
    margin-top: 6px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin: 20px 0 30px;
}

.footer-links h5 {
    color: #fff;
    font-size: 16px;
    margin-bottom: 12px;
}

.footer-links ul li {
    margin-bottom: 8px;
    font-size: 14px;
}

.footer-links ul li a:hover {
    color: var(--accent);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    flex-wrap: wrap;
    gap: 10px;
}

/* ---------- 移动浮动按钮 ---------- */
.mobile-float-download {
    display: none;
    position: fixed;
    bottom: 18px;
    left: 16px;
    right: 16px;
    z-index: 90;
}

.mobile-float-download a {
    display: block;
    background: var(--accent);
    color: #0b1d3a;
    padding: 14px;
    border-radius: 50px;
    font-weight: 700;
    text-align: center;
    box-shadow: 0 6px 24px rgba(240, 165, 0, 0.4);
}

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
    .hero-article .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .hero-cta {
        justify-content: center;
    }
    .hero-meta {
        justify-content: center;
        flex-wrap: wrap;
    }
    .content-grid {
        grid-template-columns: 1fr;
    }
    .review-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .main-nav ul {
        display: none;
    }
    .btn-download {
        display: none;
    }
    .mobile-menu-toggle {
        display: flex;
    }
    .hero-article h1 {
        font-size: 28px;
    }
    .hero-article {
        padding: 40px 0 30px;
    }
    .visual-shield {
        width: 150px;
        height: 150px;
    }
    .shield-inner {
        width: 120px;
        height: 120px;
    }
    .shield-icon {
        font-size: 36px;
    }
    .table-of-contents ul {
        flex-direction: column;
        gap: 6px;
    }
    .content-block h2 {
        font-size: 24px;
    }
    .pricing-table th,
    .pricing-table td {
        padding: 8px 6px;
        font-size: 13px;
    }
    .footer-links {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    .mobile-float-download {
        display: block;
    }
    body {
        padding-bottom: 80px;
    }
}

@media (max-width: 480px) {
    .hero-cta .btn-primary,
    .hero-cta .btn-outline {
        width: 100%;
        text-align: center;
    }
    .rating-summary {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
}