/* roulang page: index */
:root {
    --primary: #4A80C4;
    --primary-light: #EAF2FA;
    --secondary: #1B2B4A;
    --accent: #00B39B;
    --bg: #F6F9FC;
    --card: #FFFFFF;
    --text-main: #1F2A3A;
    --text-sub: #62748C;
    --border: #E1E9F2;
    --radius-card: 12px;
    --radius-btn: 8px;
    --radius-badge: 4px;
    --shadow-card: 0 4px 16px rgba(27,43,74,0.06);
    --shadow-hover: 0 10px 28px rgba(27,43,74,0.12);
    --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --section-pad: 96px;
    --section-pad-mobile: 48px;
    --container-max: 1200px;
}
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-main);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
}
a {
    text-decoration: none;
    color: var(--primary);
    transition: color 0.2s ease;
}
a:hover {
    color: #3569A8;
}
img {
    max-width: 100%;
    height: auto;
    display: block;
}
button,
input {
    font-family: inherit;
}
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}
@media (max-width: 768px) {
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }
}

/* ===== 导航 ===== */
.navbar-custom {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding-top: 0;
    padding-bottom: 0;
    min-height: 72px;
    box-shadow: 0 2px 12px rgba(27,43,74,0.04);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.navbar-custom .navbar-brand {
    font-size: 22px;
    font-weight: 700;
    color: var(--secondary);
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0;
    margin: 0;
}
.navbar-custom .brand-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
    box-shadow: 0 2px 8px rgba(74,128,196,0.3);
}
.navbar-custom .navbar-collapse {
    justify-content: flex-end;
}
.navbar-custom .navbar-nav {
    align-items: center;
    gap: 4px;
}
.navbar-custom .nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-main);
    padding: 24px 18px !important;
    transition: color 0.2s ease;
    border-bottom: 2px solid transparent;
}
.navbar-custom .nav-link:hover {
    color: var(--primary);
}
.navbar-custom .nav-link.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}
.navbar-custom .nav-cta {
    margin-left: 16px;
    padding: 10px 24px !important;
    font-size: 14px;
    font-weight: 600;
}
.navbar-toggler {
    border: 1px solid var(--border);
    padding: 6px 10px;
    border-radius: 8px;
}
.navbar-toggler:focus {
    box-shadow: none;
    border-color: var(--primary);
}
.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%234A80C4' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ===== Mega Menu ===== */
.navbar-custom .dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.navbar-custom .dropdown-menu.mega-menu {
    display: none;
    border: none;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-hover);
    padding: 0;
    min-width: 360px;
    margin-top: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all 0.2s ease;
    overflow: hidden;
}
.navbar-custom .dropdown-menu.mega-menu.show {
    display: block;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.mega-content {
    padding: 20px;
    display: flex;
    gap: 24px;
}
.mega-section {
    flex: 1;
}
.mega-section h6 {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-sub);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 8px;
}
.mega-section a {
    display: block;
    font-size: 14px;
    color: var(--text-main);
    padding: 6px 0;
    border-radius: 4px;
    transition: color 0.15s ease, padding-left 0.15s ease;
}
.mega-section a:hover {
    color: var(--primary);
    padding-left: 4px;
}
.mega-cta {
    display: block;
    background: var(--primary-light);
    color: var(--primary) !important;
    border-radius: 8px;
    padding: 12px 16px !important;
    font-weight: 600;
    font-size: 14px;
    text-align: center;
    margin-top: 8px;
    transition: background 0.2s ease, color 0.2s ease !important;
}
.mega-cta:hover {
    background: var(--primary);
    color: #fff !important;
    padding-left: 16px !important;
}

/* ===== Hero ===== */
.hero-section {
    position: relative;
    background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
    padding: 140px 0;
    color: #fff;
    overflow: hidden;
}
.hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(27,43,74,0.82) 0%, rgba(27,43,74,0.55) 50%, rgba(74,128,196,0.4) 100%);
    z-index: 1;
}
.hero-section .container {
    position: relative;
    z-index: 2;
    max-width: 1000px;
    text-align: center;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(6px);
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 50px;
    padding: 6px 18px;
    font-size: 13px;
    color: #fff;
    font-weight: 500;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
}
.hero-title {
    font-size: 50px;
    font-weight: 700;
    line-height: 1.2;
    color: #fff;
    margin-bottom: 20px;
    letter-spacing: 1px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.2);
}
.hero-title .highlight {
    color: #B8D8FF;
    position: relative;
}
.hero-subtitle {
    font-size: 20px;
    color: rgba(255,255,255,0.85);
    margin-bottom: 16px;
    font-weight: 400;
    letter-spacing: 0.5px;
}
.hero-desc {
    font-size: 15px;
    color: rgba(255,255,255,0.7);
    max-width: 600px;
    margin: 0 auto 36px;
    line-height: 1.8;
}
.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.btn-custom {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-btn);
    border: 2px solid transparent;
    transition: all 0.2s ease;
    text-decoration: none;
}
.btn-primary-custom {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(74,128,196,0.3);
}
.btn-primary-custom:hover {
    background: #3569A8;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(74,128,196,0.4);
}
.btn-outline-custom {
    background: transparent;
    border-color: rgba(255,255,255,0.7);
    color: #fff;
}
.btn-outline-custom:hover {
    background: rgba(255,255,255,0.15);
    border-color: #fff;
    color: #fff;
    transform: translateY(-2px);
}
@media (max-width: 768px) {
    .hero-section {
        padding: 80px 0;
    }
    .hero-title {
        font-size: 32px;
    }
    .hero-subtitle {
        font-size: 16px;
    }
}

/* ===== 数据条 ===== */
.stats-bar {
    background: #fff;
    border-bottom: 1px solid var(--border);
    padding: 28px 0;
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
}
.stat-item .stat-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--secondary);
    line-height: 1.2;
}
.stat-item .stat-number span {
    color: var(--primary);
}
.stat-item .stat-label {
    font-size: 14px;
    color: var(--text-sub);
    margin-top: 4px;
}
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}

/* ===== 通用板块 ===== */
.section-block {
    padding: var(--section-pad) 0;
}
.section-block.alt-bg {
    background: #fff;
}
.section-header {
    text-align: center;
    margin-bottom: 48px;
}
.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    border-radius: var(--radius-badge);
    padding: 4px 14px;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}
.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--secondary);
    line-height: 1.3;
    margin-bottom: 12px;
}
.section-subtitle {
    font-size: 15px;
    color: var(--text-sub);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}
@media (max-width: 768px) {
    .section-block {
        padding: var(--section-pad-mobile) 0;
    }
    .section-title {
        font-size: 24px;
    }
}

/* ===== 按钮（通用） ===== */
.btn-sm-custom {
    font-size: 13px;
    padding: 8px 16px;
}

/* ===== 最新动态 ===== */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 900px;
    margin: 0 auto;
}
.news-card {
    display: flex;
    gap: 24px;
    align-items: flex-start;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 24px;
    box-shadow: var(--shadow-card);
    transition: all 0.2s ease;
    cursor: pointer;
}
.news-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
}
.news-card .news-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.news-card .news-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-main);
    margin: 0;
    line-height: 1.4;
    transition: color 0.15s ease;
}
.news-card:hover .news-title {
    color: var(--primary);
}
.news-card .news-summary {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.6;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 12px;
    color: var(--text-sub);
    margin-top: 4px;
}
.news-meta .badge-news {
    background: var(--primary-light);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-badge);
    padding: 2px 8px;
}
.news-meta .news-date {
    color: var(--text-sub);
    display: flex;
    align-items: center;
    gap: 4px;
}
.news-arrow {
    font-size: 16px;
    color: var(--primary);
    opacity: 0;
    transform: translateX(-8px);
    transition: all 0.2s ease;
    align-self: center;
}
.news-card:hover .news-arrow {
    opacity: 1;
    transform: translateX(0);
}
.section-more {
    text-align: center;
    margin-top: 36px;
}
.empty-state {
    text-align: center;
    background: var(--primary-light);
    border-radius: var(--radius-card);
    padding: 48px 24px;
    color: var(--text-sub);
    font-size: 15px;
}
.empty-state i {
    font-size: 32px;
    color: var(--primary);
    margin-bottom: 12px;
    display: block;
}
@media (max-width: 768px) {
    .news-card {
        flex-direction: column;
        gap: 12px;
        padding: 18px;
    }
    .news-arrow {
        display: none;
    }
}

/* ===== 权益对比表 ===== */
.benefit-table-wrap {
    background: #fff;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 32px;
    overflow: hidden;
}
.benefit-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
}
.benefit-table thead th {
    background: var(--secondary);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    padding: 16px 20px;
    text-align: center;
    border: 1px solid var(--secondary);
}
.benefit-table thead th:first-child {
    text-align: left;
    border-radius: 8px 0 0 0;
}
.benefit-table thead th:last-child {
    border-radius: 0 8px 0 0;
}
.benefit-table thead th.recommend-col {
    background: var(--primary);
    position: relative;
}
.benefit-table thead th .recommend-badge {
    position: absolute;
    top: -10px;
    right: 12px;
    background: var(--accent);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 20px;
}
.benefit-table tbody td {
    padding: 14px 20px;
    border: 1px solid var(--border);
    font-size: 14px;
    text-align: center;
    color: var(--text-main);
    line-height: 1.6;
    vertical-align: middle;
}
.benefit-table tbody td:first-child {
    text-align: left;
    font-weight: 600;
    color: var(--secondary);
    background: var(--bg);
}
.benefit-table tbody td.recommend-col {
    background: var(--primary-light);
}
.benefit-table .icon-check {
    color: var(--accent);
    font-size: 18px;
}
.benefit-table .icon-minus {
    color: #B4C0D0;
    font-size: 16px;
}
.benefit-table tbody tr:last-child td {
    border-bottom: 1px solid var(--border);
}
@media (max-width: 991.98px) {
    .benefit-table-wrap {
        padding: 16px;
    }
    .benefit-table thead {
        display: none;
    }
    .benefit-table tbody tr {
        display: block;
        margin-bottom: 20px;
        border: 1px solid var(--border);
        border-radius: var(--radius-card);
        overflow: hidden;
    }
    .benefit-table tbody tr:last-child {
        margin-bottom: 0;
    }
    .benefit-table tbody td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        text-align: right;
        padding: 12px 16px;
        border: none;
        border-bottom: 1px solid var(--border);
    }
    .benefit-table tbody td:first-child {
        text-align: left;
        font-weight: 700;
        font-size: 15px;
        background: var(--bg);
        border-bottom: 2px solid var(--border);
    }
    .benefit-table tbody td:last-child {
        border-bottom: none;
    }
    .benefit-table tbody td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-main);
        font-size: 13px;
        margin-right: 16px;
    }
    .benefit-table tbody td.recommend-col {
        background: var(--primary-light);
    }
}

/* ===== 等级时间轴 ===== */
.level-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 0;
}
.level-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-light), var(--primary), var(--accent));
    transform: translateX(-50%);
}
.timeline-item {
    position: relative;
    width: 50%;
    padding: 20px 40px;
}
.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
    padding-right: 60px;
}
.timeline-item:nth-child(even) {
    left: 50%;
    padding-left: 60px;
}
.timeline-dot {
    position: absolute;
    top: 28px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    border: 4px solid #fff;
    box-shadow: 0 0 0 3px var(--primary);
    z-index: 2;
}
.timeline-item:nth-child(odd) .timeline-dot {
    right: -10px;
}
.timeline-item:nth-child(even) .timeline-dot {
    left: -10px;
}
.timeline-item:nth-child(3) .timeline-dot {
    background: var(--accent);
    box-shadow: 0 0 0 3px var(--accent);
}
.timeline-card {
    background: #fff;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 24px;
    transition: all 0.2s ease;
    border: 1px solid var(--border);
}
.timeline-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}
.timeline-card .level-name {
    font-size: 20px;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 8px;
}
.timeline-card .level-desc {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.7;
}
.timeline-card .level-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}
.timeline-card .level-tags span {
    font-size: 12px;
    color: var(--primary);
    background: var(--primary-light);
    border-radius: 20px;
    padding: 2px 10px;
    font-weight: 500;
}
@media (max-width: 768px) {
    .level-timeline::before {
        left: 16px;
    }
    .timeline-item {
        width: 100%;
        padding: 16px 16px 16px 40px !important;
        text-align: left !important;
        left: 0 !important;
    }
    .timeline-item .timeline-dot {
        left: 6px !important;
        right: auto !important;
    }
    .timeline-item:nth-child(odd) .timeline-dot {
        right: auto;
        left: 6px;
    }
}

/* ===== 专属内容预览 ===== */
.preview-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}
.preview-card {
    position: relative;
    border-radius: var(--radius-card);
    overflow: hidden;
    background: #fff;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}
.preview-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}
.preview-card.large {
    grid-column: 1 / -1;
}
.preview-card .preview-img {
    width: 100%;
    height: 240px;
    object-fit: cover;
}
.preview-card.large .preview-img {
    height: 320px;
}
.preview-card .preview-body {
    padding: 24px;
    position: relative;
}
.preview-card .preview-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--accent);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    z-index: 3;
    box-shadow: 0 2px 8px rgba(0,179,155,0.3);
}
.preview-card .preview-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
    line-height: 1.4;
}
.preview-card .preview-desc {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.7;
    margin: 0;
}
.preview-card .preview-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 12px;
    font-size: 13px;
    color: var(--text-sub);
}
.preview-card .preview-meta i {
    color: var(--primary);
}
@media (max-width: 768px) {
    .preview-grid {
        grid-template-columns: 1fr;
    }
    .preview-card.large {
        grid-column: auto;
    }
    .preview-card.large .preview-img {
        height: 220px;
    }
}

/* ===== 热门赛事 ===== */
.hot-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.hot-card {
    background: #fff;
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
    transition: all 0.2s ease;
}
.hot-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
}
.hot-card .hot-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}
.hot-card .hot-body {
    padding: 20px;
}
.hot-card .hot-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 6px;
    line-height: 1.4;
    transition: color 0.15s ease;
}
.hot-card:hover .hot-title {
    color: var(--primary);
}
.hot-card .hot-desc {
    font-size: 13px;
    color: var(--text-sub);
    line-height: 1.6;
    margin: 0 0 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.hot-card .hot-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: var(--text-sub);
}
.hot-card .hot-footer .hot-tag {
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 20px;
    padding: 2px 10px;
    font-weight: 500;
}
@media (max-width: 768px) {
    .hot-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin: 0 auto;
    }
}

/* ===== FAQ ===== */
.faq-wrap {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    border-bottom: 1px solid var(--border);
}
.faq-item:last-child {
    border-bottom: none;
}
.faq-question {
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    padding: 20px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}
.faq-question:hover {
    color: var(--primary);
}
.faq-question.open {
    color: var(--primary);
}
.faq-question .faq-icon {
    font-size: 18px;
    transition: transform 0.2s ease;
    color: var(--text-sub);
}
.faq-question.open .faq-icon {
    transform: rotate(45deg);
    color: var(--primary);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 16px;
}
.faq-answer.open {
    max-height: 300px;
    padding: 0 16px 20px;
}
.faq-answer p {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.7;
    margin: 0;
}

/* ===== CTA ===== */
.cta-section {
    background: var(--secondary);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 20% 50%, rgba(255,255,255,0.08) 1px, transparent 1px);
    background-size: 24px 24px;
    z-index: 1;
}
.cta-section::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(27,43,74,0.4) 0%, transparent 60%);
    z-index: 2;
}
.cta-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}
.cta-content h2 {
    font-size: 32px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
    line-height: 1.3;
}
.cta-content p {
    font-size: 15px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 32px;
    line-height: 1.7;
}
.btn-cta {
    background: var(--accent);
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    padding: 14px 40px;
    border-radius: var(--radius-btn);
    border: none;
    box-shadow: 0 4px 20px rgba(0,179,155,0.3);
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.btn-cta:hover {
    background: #009C87;
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(0,179,155,0.4);
}

/* ===== 页脚 ===== */
.footer {
    background: var(--secondary);
    color: #A8B4C4;
    padding-top: 64px;
    padding-bottom: 0;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}
.footer-brand .brand-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 14px;
}
.footer-desc {
    font-size: 14px;
    line-height: 1.7;
    color: #8899AA;
    margin-bottom: 0;
    max-width: 300px;
}
.footer-title {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}
.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--accent);
}
.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-links li {
    margin-bottom: 10px;
}
.footer-links a {
    color: #8899AA;
    font-size: 14px;
    transition: color 0.2s ease, padding-left 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.footer-links a:hover {
    color: #fff;
    padding-left: 4px;
}
.footer-links a i {
    font-size: 12px;
    color: var(--accent);
}
.footer-contact {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-contact li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: #8899AA;
    margin-bottom: 12px;
}
.footer-contact li i {
    color: var(--accent);
    width: 16px;
    text-align: center;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 20px 0;
    margin-top: 48px;
    text-align: center;
    font-size: 13px;
    color: #667788;
}
.footer-bottom a {
    color: #8899AA;
}
.footer-bottom a:hover {
    color: #fff;
}
@media (max-width: 768px) {
    .footer {
        padding-top: 48px;
    }
    .footer-bottom {
        margin-top: 32px;
    }
}

/* ===== 响应式微调 ===== */
@media (max-width: 768px) {
    .navbar-custom {
        min-height: 60px;
    }
    .navbar-custom .navbar-brand {
        font-size: 18px;
    }
    .navbar-custom .navbar-nav {
        padding: 12px 0 20px;
    }
    .navbar-custom .nav-link {
        padding: 12px 8px !important;
        border-bottom: none;
        text-align: left;
    }
    .navbar-custom .nav-cta {
        margin-left: 0;
        margin-top: 8px;
        text-align: center;
    }
    .navbar-custom .dropdown-menu.mega-menu {
        min-width: 100%;
        box-shadow: none;
        border: 1px solid var(--border);
        margin-top: 4px;
    }
    .mega-content {
        flex-direction: column;
        gap: 16px;
        padding: 16px;
    }
    .hero-title {
        font-size: 28px;
    }
    .section-title {
        font-size: 22px;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .preview-card.large .preview-img {
        height: 200px;
    }
    .hot-grid {
        grid-template-columns: 1fr;
        max-width: 100%;
    }
    .cta-content h2 {
        font-size: 24px;
    }
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.animate-up {
    animation: fadeInUp 0.6s ease both;
}
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

/* roulang page: article */
:root {
            --primary: #4A80C4;
            --primary-light: #EAF2FA;
            --primary-dark: #3A6AA8;
            --secondary: #1B2B4A;
            --accent: #00B39B;
            --bg: #F6F9FC;
            --card: #FFFFFF;
            --text-main: #1F2A3A;
            --text-sub: #62748C;
            --border: #E1E9F2;
            --radius-lg: 14px;
            --radius-md: 10px;
            --radius-sm: 6px;
            --shadow: 0 4px 16px rgba(27, 43, 74, 0.06);
            --shadow-hover: 0 10px 28px rgba(27, 43, 74, 0.12);
            --transition: all 0.25s ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

        a:hover {
            color: var(--primary-dark);
        }

        .container {
            max-width: 1200px;
        }

        /* ===== 按钮 ===== */
        .btn {
            border-radius: 8px;
            font-weight: 600;
            padding: 12px 28px;
            transition: var(--transition);
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff !important;
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            box-shadow: 0 6px 16px rgba(74, 128, 196, 0.28);
            transform: translateY(-2px);
        }

        .btn-outline-primary {
            border-color: var(--primary);
            color: var(--primary) !important;
            background: transparent;
        }

        .btn-outline-primary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-light {
            background: #fff;
            color: var(--secondary) !important;
            border-color: #fff;
        }

        .btn-light:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(255, 255, 255, 0.2);
        }

        /* ===== 导航 ===== */
        .navbar-custom {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            box-shadow: 0 2px 10px rgba(27, 43, 74, 0.04);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main) !important;
            letter-spacing: 0px;
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border-radius: 10px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            box-shadow: 0 4px 10px rgba(74, 128, 196, 0.22);
        }

        .navbar-nav .nav-link {
            color: var(--text-main);
            font-weight: 500;
            padding: 10px 18px;
            border-radius: 6px;
            transition: var(--transition);
        }

        .navbar-nav .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .navbar-nav .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .nav-cta {
            margin-left: 12px;
            padding: 10px 22px !important;
            font-size: 14px;
        }

        .navbar-toggler {
            border: none;
            padding: 6px 10px;
            border-radius: 8px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 2px var(--primary-light);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(27,43,74,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .mega-menu {
            border: none !important;
            border-radius: 12px !important;
            box-shadow: 0 12px 36px rgba(27, 43, 74, 0.12) !important;
            padding: 20px;
            min-width: 340px;
        }

        .mega-content {
            display: flex;
            gap: 24px;
            padding: 0 0 12px;
        }

        .mega-section h6 {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-sub);
            margin-bottom: 10px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .mega-section a {
            display: block;
            padding: 7px 0;
            color: var(--text-main);
            font-size: 14px;
            font-weight: 500;
        }

        .mega-section a:hover {
            color: var(--primary);
        }

        .mega-cta {
            display: block;
            text-align: center;
            background: var(--primary-light);
            border-radius: 8px;
            padding: 12px 16px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary) !important;
            transition: var(--transition);
        }

        .mega-cta:hover {
            background: var(--primary);
            color: #fff !important;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-wrap {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
        }

        .breadcrumb {
            margin: 0;
            padding: 0;
            background: transparent;
        }

        .breadcrumb-item a {
            color: var(--text-sub);
            font-size: 14px;
        }

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

        .breadcrumb-item.active {
            color: var(--text-main);
            font-size: 14px;
            font-weight: 500;
        }

        .breadcrumb-item+.breadcrumb-item::before {
            content: "/";
            color: var(--border);
        }

        /* ===== 文章主体 ===== */
        .article-wrap {
            padding: 56px 0 40px;
        }

        .article-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 40px 48px;
        }

        .article-header {
            margin-bottom: 28px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 26px;
        }

        .badge-cat {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 14px;
            border-radius: 4px;
            margin-bottom: 16px;
        }

        .article-header h1 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-main);
            margin: 0 0 18px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 14px;
            color: var(--text-sub);
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta i {
            color: var(--primary);
            font-size: 13px;
        }

        .article-summary {
            background: var(--primary-light);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-main);
            margin-bottom: 28px;
            border-left: 4px solid var(--primary);
        }

        .article-content {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-main);
        }

        .article-content p {
            margin-bottom: 24px;
        }

        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            margin: 40px 0 18px;
            color: var(--secondary);
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-light);
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            margin: 32px 0 14px;
            color: var(--secondary);
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 24px;
            padding-left: 22px;
        }

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

        .article-content img {
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            margin: 20px 0;
        }

        .article-content blockquote {
            background: var(--primary-light);
            border-left: 4px solid var(--primary);
            padding: 18px 24px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 24px 0;
            color: var(--text-main);
            font-style: italic;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }

        .article-content table th {
            background: var(--secondary);
            color: #fff;
            padding: 12px 14px;
            font-weight: 600;
        }

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

        .article-content table tr:nth-child(even) td {
            background: #f8fafc;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 30px 0 20px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }

        .tag-item {
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--text-sub);
            font-size: 13px;
            padding: 6px 14px;
            border-radius: 4px;
            transition: var(--transition);
        }

        .tag-item:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
        }

        .article-share {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 10px;
        }

        .article-share span {
            font-size: 14px;
            color: var(--text-sub);
            margin-right: 6px;
        }

        .share-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-sub);
            font-size: 14px;
            transition: var(--transition);
        }

        .share-icon:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .empty-state {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg);
            border-radius: var(--radius-lg);
            border: 2px dashed var(--border);
        }

        .empty-state i {
            font-size: 48px;
            color: var(--border);
            margin-bottom: 16px;
        }

        .empty-state p {
            color: var(--text-sub);
            font-size: 16px;
            margin-bottom: 16px;
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 56px 0;
        }

        .related-section .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 8px;
        }

        .related-section .section-sub {
            color: var(--text-sub);
            font-size: 14px;
            margin-bottom: 32px;
        }

        .related-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .related-card .cover {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--primary-light);
        }

        .related-card-body {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-card-body h5 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 10px;
        }

        .related-card-body h5 a {
            color: var(--text-main);
        }

        .related-card-body h5 a:hover {
            color: var(--primary);
        }

        .related-card-body .date {
            font-size: 13px;
            color: var(--text-sub);
            margin-top: auto;
        }

        /* ===== CTA横幅 ===== */
        .cta-banner {
            background: linear-gradient(135deg, var(--secondary) 0%, #0F1B33 100%);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
            margin: 56px 0;
        }

        .cta-banner::before {
            content: "";
            position: absolute;
            top: -30px;
            right: -30px;
            width: 160px;
            height: 160px;
            background: radial-gradient(circle, rgba(0, 179, 155, 0.2) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-banner::after {
            content: "";
            position: absolute;
            bottom: -40px;
            left: -20px;
            width: 120px;
            height: 120px;
            background: radial-gradient(circle, rgba(74, 128, 196, 0.25) 0%, transparent 70%);
            border-radius: 50%;
        }

        .cta-banner h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-banner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }

        .cta-banner .btn {
            position: relative;
            z-index: 1;
        }

        /* ===== 返回列表 ===== */
        .back-to-list {
            margin: 16px 0 0;
        }

        .back-to-list a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-sub);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

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

        /* ===== 页脚 ===== */
        .footer {
            background: var(--secondary);
            color: #B0C0D4;
            padding: 64px 0 0;
            margin-top: 40px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-desc {
            color: #8FA3BE;
            font-size: 14px;
            line-height: 1.8;
            max-width: 340px;
        }

        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
        }

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

        .footer-links a {
            color: #8FA3BE;
            font-size: 14px;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-links i {
            font-size: 12px;
            margin-right: 6px;
            color: var(--accent);
        }

        .footer-contact {
            list-style: none;
            padding: 0;
        }

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 14px;
            font-size: 14px;
            color: #8FA3BE;
        }

        .footer-contact i {
            color: var(--accent);
            margin-top: 4px;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 18px 0;
            margin-top: 48px;
            text-align: center;
            font-size: 13px;
            color: #6B7D96;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991px) {
            .navbar-collapse {
                background: #fff;
                border-radius: 12px;
                padding: 16px;
                box-shadow: var(--shadow);
                margin-top: 12px;
            }

            .navbar-nav .nav-link {
                padding: 10px 14px;
            }

            .nav-cta {
                margin-left: 0;
                margin-top: 10px;
                display: inline-block;
                text-align: center;
            }

            .mega-menu {
                box-shadow: none !important;
                background: var(--bg) !important;
                padding: 14px !important;
                border-radius: 10px !important;
                margin-top: 6px;
            }

            .mega-content {
                flex-direction: column;
                gap: 14px;
            }

            .article-card {
                padding: 28px 22px;
            }

            .article-header h1 {
                font-size: 26px;
            }

            .cta-banner {
                padding: 40px 24px;
            }

            .cta-banner h2 {
                font-size: 22px;
            }

            .related-card .cover {
                height: 160px;
            }
        }

        @media (max-width: 768px) {
            .article-wrap {
                padding: 32px 0;
            }

            .article-header h1 {
                font-size: 22px;
            }

            .article-meta {
                gap: 10px;
                font-size: 13px;
            }

            .article-summary {
                padding: 16px 18px;
                font-size: 14px;
            }

            .article-content {
                font-size: 15px;
            }

            .article-content h2 {
                font-size: 20px;
            }

            .footer {
                padding-top: 40px;
            }
        }

        @media (max-width: 520px) {
            .article-card {
                padding: 20px 16px;
            }

            .breadcrumb-item a,
            .breadcrumb-item.active {
                font-size: 13px;
            }

            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }

            .cta-banner {
                padding: 32px 18px;
            }

            .cta-banner h2 {
                font-size: 20px;
            }

            .footer-brand {
                font-size: 18px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #4A80C4;
            --primary-light: #EAF2FA;
            --primary-dark: #3A6AA8;
            --secondary: #1B2B4A;
            --accent: #00B39B;
            --bg: #F6F9FC;
            --card: #FFFFFF;
            --text-main: #1F2A3A;
            --text-sub: #62748C;
            --border: #E1E9F2;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-badge: 4px;
            --shadow-sm: 0 4px 16px rgba(27, 43, 74, 0.06);
            --shadow-hover: 0 10px 28px rgba(27, 43, 74, 0.12);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
            --transition: all 0.25s ease;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

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

        a:hover {
            color: var(--primary-dark);
        }

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

        .container {
            max-width: 1200px;
        }

        .section {
            padding: 88px 0;
        }

        .section-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-sub);
            margin-bottom: 40px;
            line-height: 1.7;
        }

        .btn {
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border: none;
            transition: var(--transition);
        }

        .btn-primary {
            background-color: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(74, 128, 196, 0.25);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background-color: var(--primary-dark);
            color: #fff;
            box-shadow: 0 8px 20px rgba(74, 128, 196, 0.35);
            transform: translateY(-2px);
        }

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

        .btn-outline-primary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        .btn-lg {
            padding: 14px 36px;
            font-size: 17px;
        }

        .badge-custom {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-badge);
            letter-spacing: 0.02em;
        }

        .badge-vip {
            background: rgba(0, 179, 155, 0.15);
            color: var(--accent);
        }

        .badge-new {
            background: linear-gradient(135deg, var(--accent), #0A8A7A);
            color: #fff;
        }

        /* ===== 导航 ===== */
        .navbar-custom {
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
            box-shadow: 0 2px 10px rgba(27, 43, 74, 0.04);
            position: sticky;
            top: 0;
            z-index: 1050;
        }

        .navbar-custom .navbar-brand {
            font-size: 20px;
            font-weight: 700;
            color: var(--secondary);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .navbar-custom .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), #6BA0D8);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
            box-shadow: 0 4px 10px rgba(74, 128, 196, 0.3);
        }

        .navbar-custom .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            padding: 10px 18px !important;
            border-radius: 6px;
            transition: var(--transition);
        }

        .navbar-custom .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

        .navbar-custom .nav-link.active {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
        }

        .navbar-custom .nav-cta {
            margin-left: 16px;
            background: linear-gradient(135deg, var(--primary), #5B93D0);
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(74, 128, 196, 0.3);
            transition: var(--transition);
        }

        .navbar-custom .nav-cta:hover {
            transform: translateY(-2px);
            color: #fff;
            box-shadow: 0 8px 22px rgba(74, 128, 196, 0.42);
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
        }

        .navbar-custom .navbar-toggler {
            border: none;
            padding: 6px 10px;
        }

        .navbar-custom .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(74, 128, 196, 0.2);
        }

        .navbar-custom .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%234A80C4' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .navbar-custom .dropdown-menu.mega-menu {
            display: none;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            top: 100%;
            min-width: 360px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-hover);
            padding: 24px;
            margin-top: 8px;
            z-index: 1100;
        }

        .navbar-custom .nav-item.dropdown:hover .dropdown-menu.mega-menu {
            display: block;
            animation: megaIn 0.25s ease;
        }

        @keyframes megaIn {
            from {
                opacity: 0;
                transform: translateX(-50%) translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateX(-50%) translateY(0);
            }
        }

        .navbar-custom .mega-content {
            display: flex;
            gap: 28px;
        }

        .navbar-custom .mega-section {
            flex: 1;
        }

        .navbar-custom .mega-section h6 {
            font-size: 13px;
            font-weight: 700;
            color: var(--text-sub);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 8px;
        }

        .navbar-custom .mega-section a {
            display: block;
            padding: 7px 0;
            font-size: 14px;
            color: var(--text-main);
            transition: var(--transition);
        }

        .navbar-custom .mega-section a:hover {
            color: var(--primary);
            padding-left: 6px;
        }

        .navbar-custom .mega-cta {
            display: block;
            margin-top: 18px;
            background: var(--primary-light);
            border-radius: var(--radius-btn);
            padding: 12px 20px;
            text-align: center;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: var(--transition);
        }

        .navbar-custom .mega-cta:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Hero / 页头 ===== */
        .category-hero {
            background: linear-gradient(120deg, rgba(234, 242, 250, 0.92), rgba(74, 128, 196, 0.55)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 84px 0 72px;
            position: relative;
            border-bottom: 1px solid var(--border);
        }

        .category-hero-content {
            max-width: 720px;
        }

        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 8px 18px;
            border-radius: 40px;
            box-shadow: 0 4px 14px rgba(74, 128, 196, 0.14);
            margin-bottom: 20px;
        }

        .category-hero .hero-badge i {
            color: var(--accent);
        }

        .category-hero h1 {
            font-size: 44px;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }

        .category-hero .hero-desc {
            font-size: 17px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 640px;
        }

        .category-breadcrumb {
            margin-bottom: 32px;
        }

        .category-breadcrumb .breadcrumb {
            margin: 0;
        }

        .category-breadcrumb .breadcrumb-item {
            font-size: 14px;
            color: var(--text-sub);
        }

        .category-breadcrumb .breadcrumb-item a {
            color: var(--primary);
            font-weight: 500;
        }

        .category-breadcrumb .breadcrumb-item.active {
            color: var(--text-sub);
            font-weight: 500;
        }

        .category-breadcrumb .breadcrumb-item+.breadcrumb-item::before {
            color: var(--border);
            content: "›";
            font-size: 16px;
            line-height: 1;
            padding: 0 6px;
        }

        /* ===== 分类介绍 ===== */
        .category-intro {
            padding: 88px 0 48px;
            background: #fff;
        }

        .intro-grid {
            display: grid;
            grid-template-columns: 1.1fr 1.9fr;
            gap: 48px;
            align-items: start;
        }

        .intro-heading h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .intro-heading .intro-line {
            width: 48px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin-top: 4px;
        }

        .intro-body p {
            color: var(--text-sub);
            font-size: 16px;
            line-height: 1.9;
            margin-bottom: 20px;
        }

        .intro-body p:last-child {
            margin-bottom: 0;
        }

        /* ===== 热门内容卡片 ===== */
        .featured-content {
            background: var(--bg);
            padding: 88px 0;
        }

        .featured-card {
            background: var(--card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            border: 1px solid rgba(225, 233, 242, 0.6);
        }

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

        .featured-card .card-cover {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
        }

        .featured-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .featured-card:hover .card-cover img {
            transform: scale(1.04);
        }

        .featured-card .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .featured-card .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
            font-size: 13px;
            color: var(--text-sub);
        }

        .featured-card .card-meta .badge-custom {
            font-size: 12px;
        }

        .featured-card .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--secondary);
            line-height: 1.4;
            margin-bottom: 10px;
            transition: var(--transition);
        }

        .featured-card:hover .card-title {
            color: var(--primary);
        }

        .featured-card .card-desc {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 16px;
            flex: 1;
        }

        .featured-card .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .featured-card .card-link i {
            font-size: 13px;
            transition: transform 0.2s ease;
        }

        .featured-card .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 资讯特点 ===== */
        .info-features {
            background: #fff;
            padding: 88px 0;
        }

        .feature-box {
            padding: 32px 28px;
            background: var(--bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--border);
            height: 100%;
            transition: var(--transition);
        }

        .feature-box:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-sm);
        }

        .feature-box .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: var(--card);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 18px;
            box-shadow: var(--shadow-sm);
        }

        .feature-box h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 10px;
        }

        .feature-box p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg);
            padding: 88px 0;
        }

        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }

        .accordion-item {
            border: none;
            border-bottom: 1px solid var(--border);
            background: transparent;
            margin-bottom: 0;
        }

        .accordion-item:first-child {
            border-top: 1px solid var(--border);
        }

        .accordion-button {
            background: transparent;
            box-shadow: none;
            color: var(--text-main);
            font-size: 16px;
            font-weight: 600;
            padding: 20px 0;
            line-height: 1.5;
            font-family: var(--font-family);
        }

        .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: transparent;
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
            outline: none;
        }

        .accordion-button::after {
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            content: "\f067";
            background-image: none;
            width: auto;
            height: auto;
            color: var(--text-sub);
            font-size: 14px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .accordion-button:not(.collapsed)::after {
            content: "\f068";
            color: var(--primary);
            transform: none;
        }

        .accordion-body {
            padding: 0 40px 20px 0;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.8;
        }

        .accordion-body p {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--secondary);
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 80% 20%, rgba(74, 128, 196, 0.25), transparent 50%), radial-gradient(circle at 15% 80%, rgba(0, 179, 155, 0.18), transparent 40%);
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 30px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .cta-content p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 16px;
            margin-bottom: 30px;
            line-height: 1.7;
        }

        .cta-content .btn-cta {
            background: #fff;
            color: var(--secondary);
            font-size: 16px;
            font-weight: 700;
            padding: 14px 40px;
            border-radius: var(--radius-btn);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
            transition: var(--transition);
        }

        .cta-content .btn-cta:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(74, 128, 196, 0.35);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--secondary);
            padding-top: 64px;
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            line-height: 1.8;
        }

        .footer .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer .brand-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), #6BA0D8);
            border-radius: 8px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 15px;
        }

        .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 0;
            font-size: 14px;
            line-height: 1.8;
        }

        .footer-title {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            padding-bottom: 12px;
            position: relative;
            margin-bottom: 20px;
        }

        .footer-title::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 28px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-links a i {
            font-size: 12px;
            color: var(--primary);
        }

        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-contact li {
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-contact li i {
            width: 32px;
            height: 32px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 6px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 14px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            margin-top: 48px;
            text-align: center;
            color: rgba(255, 255, 255, 0.45);
            font-size: 13px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .category-hero h1 {
                font-size: 38px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }

            .category-intro,
            .featured-content,
            .info-features,
            .faq-section {
                padding: 56px 0;
            }

            .category-hero {
                padding: 56px 0 48px;
            }

            .category-hero h1 {
                font-size: 32px;
            }

            .category-hero .hero-desc {
                font-size: 15px;
            }

            .section-title {
                font-size: 22px;
            }

            .navbar-custom .navbar-collapse {
                padding: 16px 0 8px;
            }

            .navbar-custom .nav-link {
                padding: 12px 12px !important;
                font-size: 15px;
            }

            .navbar-custom .nav-cta {
                margin-left: 0;
                margin-top: 12px;
                display: block;
                text-align: center;
            }

            .navbar-custom .dropdown-menu.mega-menu {
                position: static;
                width: 100%;
                transform: none;
                margin-top: 4px;
                box-shadow: none;
                border: none;
                border-left: 3px solid var(--primary-light);
                padding: 16px;
                border-radius: 8px;
                background: #fbfdff;
            }

            .navbar-custom .nav-item.dropdown:hover .dropdown-menu.mega-menu {
                display: block;
                animation: none;
            }

            .navbar-custom .mega-content {
                flex-direction: column;
                gap: 16px;
            }

            .cta-content h2 {
                font-size: 24px;
            }

            .footer {
                padding-top: 48px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .category-hero h1 {
                font-size: 28px;
            }

            .category-hero .hero-desc {
                font-size: 14px;
            }

            .category-hero .hero-badge {
                font-size: 12px;
                padding: 6px 14px;
            }

            .card-body {
                padding: 18px;
            }

            .featured-card .card-title {
                font-size: 16px;
            }

            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }

            .cta-content .btn-cta {
                font-size: 15px;
                padding: 12px 30px;
            }
        }

        /* ===== 空态 ===== */
        .empty-state {
            background: var(--bg);
            border-radius: var(--radius-card);
            padding: 40px;
            text-align: center;
            color: var(--text-sub);
            font-size: 14px;
            border: 1px dashed var(--border);
        }

        .empty-state i {
            font-size: 28px;
            color: #B8CDE4;
            display: block;
            margin-bottom: 12px;
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 100%;
            height: 1px;
            background: var(--border);
            border: none;
            margin: 0;
        }