/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
    --primary: #2563EB;
    --primary-hover: #1D4ED8;
    --primary-light: #DBEAFE;
    --secondary: #0D9488;
    --secondary-light: #CCFBF1;
    --accent: #D97706;
    --bg: #F4F7FB;
    --card-bg: #FFFFFF;
    --text: #1E293B;
    --text-secondary: #64748B;
    --text-muted: #94A3B8;
    --border: #E2E8F0;
    --success: #16A34A;
    --error: #DC2626;
    --radius: 16px;
    --radius-sm: 8px;
    --shadow: 0 4px 16px rgba(37, 99, 235, 0.06);
    --shadow-hover: 0 8px 24px rgba(37, 99, 235, 0.12);
    --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08);
    --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
    --container: 1280px;
    --header-height: 72px;
    --spacing-section: 90px;
    --spacing-mobile: 56px;
}

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

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

body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

button {
    font-family: var(--font);
    border: none;
    background: none;
    cursor: pointer;
}

input,
textarea {
    font-family: var(--font);
    font-size: 16px;
}

ul,
ol {
    list-style: none;
}

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

.section {
    padding: var(--spacing-section) 0;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 36px;
}

.section-header h2 {
    font-size: clamp(22px, 3vw, 30px);
    font-weight: 700;
    letter-spacing: 0.5px;
    position: relative;
}

.section-header h2::after {
    content: '';
    display: block;
    width: 42px;
    height: 4px;
    border-radius: 2px;
    background: var(--primary);
    margin-top: 8px;
}

.view-all {
    font-size: 14px;
    color: var(--primary);
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--primary-light);
    transition: all 0.25s ease;
    white-space: nowrap;
}

.view-all:hover {
    background: var(--primary);
    color: #fff;
}

/* ========== 按钮体系 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 16px;
    font-weight: 600;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    transition: all 0.25s ease;
    border: 1px solid transparent;
    line-height: 1.4;
    white-space: nowrap;
    cursor: pointer;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background: var(--primary-hover);
    box-shadow: 0 6px 18px rgba(37, 99, 235, 0.4);
}

.btn-primary:focus-visible {
    outline: 3px solid var(--primary-light);
    outline-offset: 2px;
}

.btn-outline {
    background: #fff;
    color: var(--text);
    border-color: #CBD5E1;
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
}

.btn-outline:focus-visible {
    outline: 3px solid var(--primary-light);
    outline-offset: 2px;
}

.btn-ghost {
    background: transparent;
    color: var(--primary);
}

.btn-ghost:hover {
    background: var(--primary-light);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

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

/* ========== 导航 ========== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(8px);
    box-shadow: 0 2px 12px rgba(15, 23, 42, 0.06);
    border-bottom: 1px solid rgba(226, 232, 240, 0.6);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.3);
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

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

.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 8px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 6px;
    transition: all 0.2s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    border-radius: 2px;
    background: var(--primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.hamburger {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 8px;
    border: 1px solid var(--border);
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.hamburger:hover {
    background: var(--primary-light);
}

.hamburger svg {
    width: 22px;
    height: 22px;
    fill: var(--text);
}

/* 移动端抽屉 */
.mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 320px;
    height: 100vh;
    background: #fff;
    z-index: 2000;
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    transition: right 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    box-shadow: -10px 0 40px rgba(15, 23, 42, 0.12);
}

.mobile-nav.open {
    right: 0;
}

.mobile-nav-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.mobile-nav-close {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg);
    transition: background 0.2s;
}

.mobile-nav-close:hover {
    background: #fee2e2;
}

.mobile-nav .nav-link {
    font-size: 17px;
    padding: 12px 16px;
    border-radius: 10px;
    display: block;
}

.mobile-nav .nav-link.active {
    background: var(--primary-light);
    color: var(--primary);
}

.mobile-nav .btn {
    margin-top: 12px;
    width: 100%;
}

.mobile-nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    z-index: 1500;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-nav-overlay.show {
    opacity: 1;
    visibility: visible;
}

/* ========== Hero ========== */
.hero {
    position: relative;
    min-height: 640px;
    padding: 100px 0;
    display: flex;
    align-items: center;
    background-image: url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.92) 0%, rgba(244, 247, 251, 0.88) 45%, rgba(219, 234, 254, 0.72) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 680px;
}

.hero-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(37, 99, 235, 0.2);
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 24px;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.08);
}

.hero h1 {
    font-size: clamp(30px, 5vw, 54px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 1px;
    color: var(--text);
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 560px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.hero-trust {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.hero-trust span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.85);
    padding: 6px 14px;
    border-radius: 999px;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.04);
}

.hero-trust svg {
    width: 14px;
    height: 14px;
    fill: var(--secondary);
}

/* ========== 横滑片库 ========== */
.video-scroll {
    background: var(--bg);
    overflow: hidden;
}

.scroll-container {
    display: flex;
    gap: 20px;
    overflow-x: auto;
    padding-bottom: 16px;
    scrollbar-width: thin;
    scrollbar-color: var(--primary) transparent;
}

.scroll-container::-webkit-scrollbar {
    height: 4px;
}

.scroll-container::-webkit-scrollbar-track {
    background: transparent;
}

.scroll-container::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 2px;
}

.scroll-card {
    flex: 0 0 300px;
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.scroll-card .card-cover {
    aspect-ratio: 16 / 9;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.scroll-card:hover .card-cover img {
    transform: scale(1.05);
}

.scroll-card .card-body {
    padding: 18px 20px;
}

.scroll-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
    line-height: 1.4;
}

.scroll-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ========== 热播推荐 ========== */
.hot-recommend {
    background: #fff;
}

.hot-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.hot-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid rgba(226, 232, 240, 0.6);
    transition: all 0.3s ease;
    position: relative;
}

.hot-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
}

.hot-card .hot-cover {
    position: relative;
    aspect-ratio: 16 / 10;
    background: linear-gradient(135deg, var(--primary-light), #E0F2FE);
    overflow: hidden;
}

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

.hot-card:hover .hot-cover img {
    transform: scale(1.03);
}

.hot-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 2;
}

.hot-badge .top {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 999px;
    box-shadow: 0 4px 8px rgba(217, 119, 6, 0.3);
    letter-spacing: 0.5px;
}

.hot-body {
    padding: 22px 24px;
}

.hot-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.badge {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 999px;
}

.badge-secondary {
    background: var(--secondary-light);
    color: var(--secondary);
}

.hot-meta span:not(.badge) {
    font-size: 13px;
    color: var(--text-muted);
}

.hot-body h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text);
    line-height: 1.4;
}

.hot-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ========== 片单分区 ========== */
.channel-section {
    background: var(--bg);
}

.channel-block {
    margin-bottom: 80px;
}

.channel-block:last-child {
    margin-bottom: 0;
}

.channel-block-header {
    margin-bottom: 32px;
}

.channel-block-header h2 {
    font-size: clamp(22px, 3vw, 28px);
    font-weight: 700;
    margin-bottom: 8px;
}

.channel-block-header p {
    font-size: 15px;
    color: var(--text-secondary);
}

/* 分区1：左图右文 */
.channel-block-1 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    background: #fff;
    border-radius: 20px;
    padding: 48px;
    box-shadow: var(--shadow);
}

.channel-block-1 .channel-img {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

.channel-block-1 .channel-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.channel-block-1 h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text);
}

.channel-block-1 p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.channel-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.channel-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

.channel-list li::before {
    content: '✓';
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--secondary-light);
    color: var(--secondary);
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

/* 分区2：双列图文横条 */
.channel-block-2 {
    padding: 24px 0;
}

.dual-column {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.dual-item {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    border: 1px solid rgba(226, 232, 240, 0.5);
}

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

.dual-item .dual-img {
    aspect-ratio: 16 / 7;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary-light), #E0F2FE);
}

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

.dual-item:hover .dual-img img {
    transform: scale(1.04);
}

.dual-body {
    padding: 24px;
}

.dual-body h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.dual-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 分区3：列表式条目 */
.channel-block-3 {
    background: #fff;
    border-radius: 20px;
    padding: 48px;
    box-shadow: var(--shadow);
}

.list-items {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.list-item {
    display: flex;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg);
    border-radius: 12px;
    border-left: 4px solid var(--primary);
    transition: all 0.25s ease;
}

.list-item:hover {
    background: var(--primary-light);
    transform: translateX(4px);
}

.list-item .list-num {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    min-width: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #fff;
    border-radius: 8px;
    height: 40px;
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.1);
}

.list-item .list-content h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
}

.list-item .list-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========== 追剧 CTA ========== */
.cta-section {
    background: var(--bg);
}

.cta-card {
    background: linear-gradient(135deg, #DBEAFE, #EFF6FF);
    border-radius: 24px;
    padding: 64px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: '';
    position: absolute;
    width: 320px;
    height: 320px;
    border-radius: 50%;
    border: 40px solid rgba(37, 99, 235, 0.05);
    top: -100px;
    right: -80px;
}

.cta-card::after {
    content: '';
    position: absolute;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    border: 24px solid rgba(13, 148, 136, 0.06);
    bottom: -60px;
    left: -40px;
}

.cta-card h2 {
    font-size: clamp(22px, 3vw, 28px);
    font-weight: 700;
    color: var(--text);
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.cta-card p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    position: relative;
    z-index: 1;
}

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

/* ========== 最新资讯 ========== */
.news-section {
    background: #fff;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 900px;
}

.news-item {
    display: flex;
    gap: 20px;
    background: var(--card-bg);
    border: 1px solid rgba(226, 232, 240, 0.6);
    border-radius: var(--radius);
    padding: 20px;
    transition: all 0.25s ease;
    box-shadow: var(--shadow);
}

.news-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
    border-color: rgba(37, 99, 235, 0.3);
}

.news-thumb {
    width: 96px;
    height: 96px;
    border-radius: 10px;
    overflow: hidden;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
}

.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-width: 0;
}

.news-info h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 6px;
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.news-info p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 10px;
}

.news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--text-muted);
}

.read-more {
    margin-left: auto;
    color: var(--primary);
    font-weight: 500;
    font-size: 14px;
    transition: transform 0.2s;
}

.read-more:hover {
    transform: translateX(4px);
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 30px;
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    text-align: center;
    color: var(--text-muted);
}

.empty-state svg {
    width: 48px;
    height: 48px;
    fill: var(--text-muted);
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 15px;
}

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

.faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: #F8FAFC;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.25s ease;
}

.faq-item.active {
    border-color: rgba(37, 99, 235, 0.3);
    box-shadow: var(--shadow);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    text-align: left;
    background: transparent;
    transition: background 0.2s;
}

.faq-question:hover {
    background: rgba(37, 99, 235, 0.04);
}

.faq-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    flex-shrink: 0;
    transition: transform 0.3s ease;
    font-size: 14px;
}

.faq-item.active .faq-arrow {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 20px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== 页脚 ========== */
.site-footer {
    background: #0F172A;
    color: #94A3B8;
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}

.footer-brand .logo-text {
    color: #fff;
    font-size: 18px;
    margin-bottom: 14px;
}

.footer-brand .logo-text span {
    color: var(--primary-light);
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    margin-top: 12px;
}

.footer-col h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col ul a {
    font-size: 14px;
    color: #94A3B8;
    transition: color 0.2s;
}

.footer-col ul a:hover {
    color: #fff;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 0;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-bottom p {
    font-size: 13px;
    color: #64748B;
}

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 18px rgba(37, 99, 235, 0.35);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 100;
    font-size: 18px;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-hover);
    transform: translateY(-4px);
}

/* ========== 响应式 ========== */
@media (max-width: 1280px) {
    .container {
        padding-left: 20px;
        padding-right: 20px;
    }
}

@media (max-width: 1024px) {
    .main-nav {
        display: none;
    }

    .hamburger {
        display: flex;
    }

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

    .channel-block-1 {
        grid-template-columns: 1fr;
        padding: 32px;
    }

    .dual-column {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-section: 48px;
    }

    .header-inner {
        padding: 0 16px;
    }

    .logo-text {
        font-size: 16px;
    }

    .hero {
        min-height: auto;
        padding: 80px 0;
    }

    .hero h1 {
        font-size: 30px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .hero-trust {
        gap: 8px;
    }

    .scroll-card {
        flex-basis: 260px;
    }

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

    .section-header {
        margin-bottom: 24px;
    }

    .news-item {
        flex-direction: row;
        padding: 14px;
        gap: 14px;
    }

    .news-thumb {
        width: 72px;
        height: 72px;
        border-radius: 8px;
    }

    .news-info h4 {
        font-size: 14px;
    }

    .news-info p {
        font-size: 13px;
        -webkit-line-clamp: 1;
    }

    .news-meta {
        gap: 6px;
        font-size: 12px;
    }

    .read-more {
        display: none;
    }

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

    .channel-block-1 {
        padding: 24px;
    }

    .channel-block-3 {
        padding: 24px;
    }

    .list-item {
        padding: 16px;
        flex-direction: column;
    }

    .list-item .list-num {
        font-size: 16px;
        height: 32px;
        min-width: 28px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

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

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 38px;
        height: 38px;
    }

    .faq-question {
        font-size: 14px;
        padding: 16px 18px;
    }

    .faq-answer p {
        font-size: 14px;
        padding: 0 18px 16px;
    }
}

@media (max-width: 520px) {
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }

    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 16px;
    }

    .logo-text {
        font-size: 14px;
    }

    .header-actions .btn {
        display: none;
    }

    .dual-body {
        padding: 18px;
    }

    .hot-body {
        padding: 18px;
    }
}

/* ========== 可访问性 ========== */
a:focus-visible,
button:focus-visible {
    outline: 3px solid var(--primary-light);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* roulang page: article */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-light: #DBEAFE;
            --secondary: #0D9488;
            --accent: #D97706;
            --bg: #F4F7FB;
            --card: #FFFFFF;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-light: #94A3B8;
            --border: #E2E8F0;
            --success: #16A34A;
            --error: #DC2626;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 16px rgba(37, 99, 235, 0.06);
            --shadow-hover: 0 8px 24px rgba(37, 99, 235, 0.12);
            --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08);
            --container: 1280px;
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --transition: all .3s ease;
        }
        *, *::before, *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul, ol {
            list-style: none;
        }
        button, input {
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* Header Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #fff;
            border-bottom: 1px solid rgba(226, 232, 240, .6);
            box-shadow: 0 2px 12px rgba(15, 23, 42, .04);
            height: 72px;
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), #60A5FA);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            letter-spacing: .5px;
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--primary);
            font-weight: 700;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: 48px;
        }
        .nav-link {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-left: auto;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            line-height: 1.4;
        }
        .btn:hover {
            transform: translateY(-1px);
        }
        .btn:active {
            transform: scale(.98);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: 0 4px 12px rgba(37, 99, 235, .3);
        }
        .btn-secondary {
            background: #fff;
            color: var(--text);
            border: 1px solid #CBD5E1;
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            border-radius: 8px;
            background: transparent;
            transition: var(--transition);
        }
        .hamburger:hover {
            background: var(--bg);
        }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 72px;
            left: 0;
            right: 0;
            bottom: 0;
            background: #fff;
            z-index: 999;
            padding: 32px 24px;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link {
            font-size: 18px;
            padding: 14px 16px;
            border-radius: 12px;
        }
        .mobile-menu .btn {
            margin-top: 16px;
            width: 100%;
        }
        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            .header-actions .btn-sm {
                display: none;
            }
            .hamburger {
                display: flex;
            }
        }

        /* Article Page */
        .article-hero {
            background: linear-gradient(135deg, #EFF6FF 0%, #F4F7FB 60%, #DBEAFE 100%);
            padding: 64px 0 48px;
            border-bottom: 1px solid rgba(226, 232, 240, .5);
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(37, 99, 235, .06);
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: 10%;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(13, 148, 136, .05);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--text-light);
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
            max-width: 300px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .article-title {
            font-size: clamp(24px, 3.5vw, 36px);
            font-weight: 700;
            line-height: 1.4;
            color: var(--text);
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
            max-width: 840px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 14px;
            color: var(--text-secondary);
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .meta-item .icon {
            width: 16px;
            height: 16px;
            color: var(--text-light);
        }

        /* Article Body */
        .article-section {
            padding: 48px 0 80px;
        }
        .article-layout {
            display: flex;
            gap: 48px;
            align-items: flex-start;
        }
        .article-main {
            flex: 1;
            max-width: 860px;
            margin: 0 auto;
        }
        .article-card {
            background: var(--card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            overflow: hidden;
        }
        .article-feature-img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }
        .article-content {
            padding: 40px 48px;
        }
        .article-content .post-body {
            max-width: 760px;
            margin: 0 auto;
            font-size: 17px;
            line-height: 1.8;
            color: #334155;
            letter-spacing: .5px;
        }
        .article-content .post-body p {
            margin-bottom: 24px;
        }
        .article-content .post-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin: 40px 0 16px;
            line-height: 1.4;
        }
        .article-content .post-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            margin: 32px 0 12px;
        }
        .article-content .post-body img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .article-content .post-body ul,
        .article-content .post-body ol {
            margin: 16px 0 24px;
            padding-left: 24px;
        }
        .article-content .post-body ul li,
        .article-content .post-body ol li {
            margin-bottom: 8px;
            position: relative;
        }
        .article-content .post-body ul li::before {
            content: '';
            position: absolute;
            left: -20px;
            top: 12px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
        }
        .article-content .post-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content .post-body code {
            background: #F1F5F9;
            padding: 2px 6px;
            border-radius: 4px;
            font-size: 14px;
            font-family: "Inter", monospace;
        }
        .article-tags {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            padding: 24px 48px 32px;
            border-top: 1px solid var(--border);
        }
        .tag {
            display: inline-block;
            padding: 6px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
        }
        .article-actions {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 48px 40px;
            flex-wrap: wrap;
            gap: 16px;
        }
        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 14px;
            padding: 8px 16px;
            border-radius: 8px;
            transition: var(--transition);
        }
        .back-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }
        .back-link .icon {
            width: 16px;
            height: 16px;
        }
        .share-link {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            color: var(--text-light);
            font-size: 14px;
        }
        .share-link a {
            color: var(--text-light);
            transition: var(--transition);
        }
        .share-link a:hover {
            color: var(--primary);
        }
        @media (max-width: 768px) {
            .article-hero {
                padding: 40px 0 32px;
            }
            .article-content {
                padding: 24px 20px;
            }
            .article-tags {
                padding: 16px 20px 24px;
            }
            .article-actions {
                padding: 0 20px 24px;
            }
            .article-feature-img {
                height: 200px;
            }
            .article-section {
                padding: 24px 0 48px;
            }
        }

        /* Empty State */
        .empty-state {
            text-align: center;
            padding: 80px 24px;
            border: 2px dashed var(--border);
            border-radius: var(--radius-lg);
            background: #fff;
        }
        .empty-state .icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--bg);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }
        .empty-state .icon-wrap svg {
            width: 28px;
            height: 28px;
            color: var(--text-light);
        }
        .empty-state h3 {
            font-size: 18px;
            color: var(--text);
            margin-bottom: 8px;
        }
        .empty-state p {
            color: var(--text-secondary);
            font-size: 15px;
        }
        .empty-state .btn {
            margin-top: 24px;
        }

        /* Related */
        .related-section {
            padding: 60px 0 80px;
            background: #fff;
        }
        .related-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }
        .related-header h2 {
            font-size: clamp(20px, 2.5vw, 28px);
            font-weight: 700;
            color: var(--text);
        }
        .related-header .view-all {
            font-size: 14px;
            color: var(--primary);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .related-header .view-all:hover {
            color: var(--primary-hover);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: transparent;
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .related-card .card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-title:hover {
            color: var(--primary);
        }
        .related-card .card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-meta {
            margin-top: auto;
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-light);
        }
        @media (max-width: 768px) {
            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .related-card {
                flex-direction: row;
            }
            .related-card .card-img {
                width: 120px;
                height: 100%;
                min-height: 100px;
                flex-shrink: 0;
            }
            .related-card .card-body {
                padding: 16px;
            }
            .related-card .card-desc {
                display: none;
            }
        }

        /* CTA */
        .cta-section {
            padding: 64px 0;
        }
        .cta-card {
            background: linear-gradient(135deg, #DBEAFE 0%, #EFF6FF 50%, #E0F2FE 100%);
            border-radius: 24px;
            padding: 56px 64px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-card::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            border: 2px solid rgba(37, 99, 235, .1);
        }
        .cta-card::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: 20%;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            border: 2px solid rgba(13, 148, 136, .1);
        }
        .cta-card h2 {
            font-size: clamp(22px, 3vw, 32px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-card p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-card .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        @media (max-width: 768px) {
            .cta-card {
                padding: 40px 24px;
            }
            .cta-card .btn-group {
                flex-direction: column;
                width: 100%;
            }
            .cta-card .btn-group .btn {
                width: 100%;
            }
        }

        /* Footer */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 64px 0 0;
            font-size: 14px;
            line-height: 1.8;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
        }
        .footer-brand .logo-text {
            color: #fff;
            font-size: 18px;
        }
        .footer-brand p {
            color: #94A3B8;
            font-size: 14px;
            line-height: 1.8;
            margin-top: 12px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .footer-col ul li {
            margin-bottom: 12px;
        }
        .footer-col ul li a {
            color: #94A3B8;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(148, 163, 184, .15);
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #64748B;
        }
        @media (max-width: 768px) {
            .site-footer {
                padding: 48px 0 0;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #DBEAFE;
            --secondary: #0D9488;
            --accent: #D97706;
            --bg: #F4F7FB;
            --card-bg: #FFFFFF;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --success: #16A34A;
            --error: #DC2626;
            --warning: #D97706;
            --shadow-card: 0 4px 16px rgba(37, 99, 235, 0.06);
            --shadow-hover: 0 8px 24px rgba(37, 99, 235, 0.12);
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-badge: 999px;
            --container-width: 1280px;
            --header-height: 72px;
            --space-section: 80px;
            --space-section-mobile: 48px;
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
        }

        *,
        *::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: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }

        button {
            font-family: inherit;
            border: none;
            cursor: pointer;
            transition: all .2s ease;
        }

        input {
            font-family: inherit;
        }

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

        /* === Header / Nav === */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 1px 12px rgba(15, 23, 42, 0.06);
            z-index: 1000;
            backdrop-filter: blur(6px);
        }

        .header-inner {
            max-width: var(--container-width);
            height: 100%;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }

        .logo-text {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

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

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

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 2px;
            position: relative;
            transition: color .2s;
        }

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

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

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 9px 22px;
            border-radius: var(--radius-btn);
            transition: all .25s ease;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.18);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #fff;
            color: var(--text);
            font-size: 15px;
            font-weight: 500;
            padding: 9px 22px;
            border-radius: var(--radius-btn);
            border: 1px solid #CBD5E1;
            transition: all .25s ease;
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.08);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            padding: 10px;
            border-radius: 8px;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all .3s;
        }

        .nav-toggle:hover span {
            background: var(--primary);
        }

        /* === Page Hero === */
        .page-hero {
            position: relative;
            padding: calc(var(--header-height) + 56px) 24px 64px;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            text-align: center;
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.92) 0%, rgba(219, 234, 254, 0.75) 100%);
            z-index: 1;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .page-hero h1 {
            font-size: clamp(28px, 4vw, 44px);
            font-weight: 700;
            color: var(--text);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .page-hero h1 span {
            color: var(--primary);
        }

        .page-hero .hero-desc {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 20px;
        }

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

        .breadcrumb a:hover {
            text-decoration: underline;
        }

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

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

        /* === Feature Detail (左文右图) === */
        .feature-detail {
            padding: var(--space-section) 0 60px;
        }

        .feature-detail-inner {
            display: flex;
            align-items: center;
            gap: 56px;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 48px;
            box-shadow: var(--shadow-card);
        }

        .feature-text {
            flex: 1;
        }

        .feature-text h2 {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .feature-text p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
        }

        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
        }

        .feature-list li {
            position: relative;
            padding-left: 32px;
            font-size: 15px;
            color: var(--text);
            margin-bottom: 12px;
            line-height: 1.6;
        }

        .feature-list li::before {
            content: "\f00c";
            font-family: "Font Awesome 6 Free";
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 2px;
            width: 20px;
            height: 20px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
        }

        .feature-stats {
            display: flex;
            gap: 32px;
            margin-top: 8px;
            flex-wrap: wrap;
        }

        .stat-item {
            text-align: center;
            background: var(--bg);
            border-radius: 12px;
            padding: 16px 20px;
            min-width: 110px;
        }

        .stat-item .num {
            font-size: 26px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-item .label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        .feature-image {
            flex: 1;
            min-width: 0;
        }

        .feature-image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            border-radius: 14px;
            box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
        }

        /* === Feature Cards === */
        .feature-cards {
            padding: 40px 0 20px;
        }

        .section-head {
            text-align: center;
            margin-bottom: 44px;
        }

        .section-head h2 {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
            margin-bottom: 8px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 520px;
            margin: 0 auto;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px 28px;
            transition: transform .25s, box-shadow .25s;
            border: 1px solid rgba(226, 232, 240, 0.6);
        }

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

        .feature-card .icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* === CTA Section === */
        .cta-section {
            padding: 60px 0 var(--space-section);
        }

        .cta-box {
            background: linear-gradient(135deg, #DBEAFE, #EFF6FF);
            border-radius: 24px;
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(37, 99, 235, 0.12);
        }

        .cta-box::before {
            content: "";
            position: absolute;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(37, 99, 235, 0.06);
            top: -60px;
            right: -60px;
        }

        .cta-box::after {
            content: "";
            position: absolute;
            width: 120px;
            height: 120px;
            border-radius: 50%;
            background: rgba(13, 148, 136, 0.06);
            bottom: -40px;
            left: -40px;
        }

        .cta-box h2 {
            font-size: clamp(22px, 3vw, 28px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-box p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
            position: relative;
            z-index: 1;
        }

        .cta-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
        }

        .cta-btns .btn-primary {
            padding: 12px 32px;
            font-size: 16px;
        }

        .cta-btns .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--primary);
            font-size: 15px;
            font-weight: 500;
            padding: 11px 28px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(37, 99, 235, 0.4);
            transition: all .25s;
        }

        .cta-btns .btn-outline:hover {
            background: rgba(37, 99, 235, 0.08);
            border-color: var(--primary);
        }

        /* === Footer === */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 64px 0 0;
        }

        .site-footer .container {
            max-width: var(--container-width);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand .logo {
            margin-bottom: 16px;
        }

        .footer-brand .logo .logo-text {
            color: #fff;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: #94A3B8;
            max-width: 320px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 20px;
        }

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

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

        .footer-col ul li a {
            font-size: 14px;
            color: #94A3B8;
            transition: color .2s;
        }

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

        .footer-col ul li {
            font-size: 14px;
            line-height: 1.6;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .footer-bottom p {
            font-size: 13px;
            color: #64748B;
        }

        /* === Responsive === */
        @media (max-width: 1024px) {
            .feature-detail-inner {
                flex-direction: column;
                padding: 32px;
                gap: 32px;
            }

            .feature-image img {
                height: 260px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }

            .header-inner {
                padding: 0 16px;
            }

            .nav-toggle {
                display: flex;
            }

            .main-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 12px 24px 24px;
                box-shadow: 0 8px 24px rgba(15, 23, 42, 0.1);
                display: none;
                gap: 4px;
            }

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

            .nav-link {
                padding: 12px 8px;
                font-size: 16px;
            }

            .nav-link.active::after {
                bottom: 4px;
            }

            .header-cta .btn-primary {
                padding: 8px 16px;
                font-size: 14px;
            }

            .page-hero {
                padding: calc(var(--header-height) + 40px) 16px 48px;
            }

            .page-hero h1 {
                font-size: 30px;
            }

            .page-hero .hero-desc {
                font-size: 16px;
            }

            .feature-detail {
                padding: 48px 0 32px;
            }

            .feature-detail-inner {
                padding: 24px;
            }

            .feature-stats {
                gap: 16px;
            }

            .stat-item {
                min-width: 90px;
                padding: 12px 14px;
            }

            .stat-item .num {
                font-size: 22px;
            }

            .feature-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .feature-card {
                padding: 24px;
            }

            .cta-section {
                padding: 40px 0 48px;
            }

            .cta-box {
                padding: 32px 24px;
                border-radius: 16px;
            }

            .cta-btns {
                flex-direction: column;
                align-items: center;
                gap: 12px;
            }

            .cta-btns .btn-primary,
            .cta-btns .btn-outline {
                width: 100%;
                max-width: 260px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

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

        @media (max-width: 480px) {
            .logo-text {
                font-size: 17px;
            }

            .feature-detail-inner {
                padding: 20px;
            }

            .feature-text h2 {
                font-size: 22px;
            }

            .feature-text p {
                font-size: 15px;
            }

            .feature-list li {
                font-size: 14px;
            }

            .feature-image img {
                height: 200px;
            }

            .feature-stats {
                flex-direction: row;
                justify-content: space-between;
            }

            .stat-item {
                flex: 1;
                min-width: auto;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2563EB;
            --primary-hover: #1D4ED8;
            --primary-light: #DBEAFE;
            --secondary: #0D9488;
            --accent: #D97706;
            --bg: #F4F7FB;
            --card: #FFFFFF;
            --text: #1E293B;
            --text-secondary: #64748B;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --success: #16A34A;
            --error: #DC2626;
            --warning: #D97706;
            --radius-lg: 16px;
            --radius-md: 8px;
            --radius-sm: 6px;
            --shadow-sm: 0 4px 16px rgba(37, 99, 235, 0.06);
            --shadow-md: 0 8px 24px rgba(37, 99, 235, 0.12);
            --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08);
            --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --container: 1280px;
            --header-h: 72px;
        }

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

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

        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }

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

        .section {
            padding: 96px 0;
        }

        .section-head {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 48px;
        }

        .section-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            color: var(--text);
            line-height: 1.3;
            letter-spacing: 0.5px;
        }

        .section-sub {
            font-size: 16px;
            color: var(--text-secondary);
            margin-top: 12px;
        }

        /* ===== header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 8px rgba(15, 23, 42, 0.05);
            z-index: 1000;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

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

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .main-nav .nav-link {
            display: inline-block;
            padding: 8px 16px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.25s ease;
        }

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

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-md);
            padding: 12px 28px;
            transition: all 0.25s ease;
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-outline {
            background: #fff;
            color: var(--primary);
            border: 1px solid #CBD5E1;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.1);
        }

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

        .header-btn {
            padding: 8px 20px;
            font-size: 14px;
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            color: var(--text);
            transition: background 0.2s;
        }

        .menu-toggle:hover {
            background: var(--primary-light);
        }

        .menu-toggle svg {
            width: 22px;
            height: 22px;
        }

        /* ===== banner ===== */
        .banner {
            position: relative;
            min-height: 540px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: calc(var(--header-h) + 72px) 24px 80px;
            background: linear-gradient(135deg, rgba(255, 255, 255, 0.94) 0%, rgba(219, 234, 254, 0.86) 100%), url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
        }

        .banner-inner {
            max-width: 820px;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid var(--primary-light);
            border-radius: 999px;
            padding: 8px 20px;
            font-size: 14px;
            color: var(--primary);
            font-weight: 500;
            margin-bottom: 24px;
            box-shadow: var(--shadow-sm);
        }

        .banner-badge svg {
            width: 16px;
            height: 16px;
        }

        .banner-title {
            font-size: clamp(30px, 5vw, 52px);
            font-weight: 700;
            line-height: 1.25;
            color: var(--text);
            letter-spacing: 1px;
            margin-bottom: 20px;
        }

        .banner-title span {
            color: var(--primary);
        }

        .banner-desc {
            font-size: 18px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 36px;
        }

        .banner-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .banner-trust {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 32px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .banner-trust svg {
            width: 18px;
            height: 18px;
            color: var(--secondary);
        }

        /* ===== timeline ===== */
        .timeline-section {
            background: var(--bg);
        }

        .timeline {
            position: relative;
            max-width: 800px;
            margin: 0 auto;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 36px;
            top: 16px;
            bottom: 16px;
            width: 2px;
            background: linear-gradient(180deg, var(--primary), var(--primary-light));
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            padding: 0 0 40px 96px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-number {
            position: absolute;
            left: 0;
            top: 0;
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: var(--primary-light);
            border: 2px solid #fff;
            box-shadow: var(--shadow-sm);
            color: var(--primary);
            font-size: 18px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1;
        }

        .timeline-content {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.3s, transform 0.3s;
        }

        .timeline-content:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .timeline-content h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .timeline-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        .timeline-icon {
            color: var(--primary);
            display: inline-flex;
        }

        .timeline-icon svg {
            width: 18px;
            height: 18px;
        }

        /* ===== stats ===== */
        .stats-section {
            background: #fff;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 16px;
        }

        .stat-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            text-align: center;
            transition: box-shadow 0.3s, transform 0.3s;
        }

        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .stat-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }

        .stat-icon svg {
            width: 24px;
            height: 24px;
        }

        .stat-num {
            font-size: 42px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 8px;
        }

        /* ===== secure area ===== */
        .secure-section {
            background: var(--bg);
        }

        .secure-area {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 48px;
            align-items: center;
            margin-top: 24px;
        }

        .secure-media img {
            width: 100%;
            height: 480px;
            object-fit: cover;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
        }

        .secure-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .secure-item {
            display: flex;
            gap: 16px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow 0.3s, transform 0.3s;
        }

        .secure-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .secure-icon {
            width: 48px;
            height: 48px;
            flex-shrink: 0;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .secure-icon svg {
            width: 22px;
            height: 22px;
        }

        .secure-text h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
        }

        .secure-text p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== faq ===== */
        .faq-section {
            background: #fff;
        }

        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: #F8FAFC;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: box-shadow 0.3s, border-color 0.3s;
        }

        .faq-item.open {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 24px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            min-height: 44px;
            transition: color 0.2s;
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
        }

        .faq-icon svg {
            width: 14px;
            height: 14px;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 22px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            border-top: 1px solid var(--border);
            padding-top: 16px;
            margin: 0 24px;
            padding-left: 0;
            padding-right: 0;
        }

        /* ===== cta ===== */
        .cta-section {
            background: var(--bg);
        }

        .cta-card {
            background: linear-gradient(135deg, #DBEAFE 0%, #EFF6FF 100%);
            border-radius: 24px;
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            border: 40px solid rgba(37, 99, 235, 0.08);
        }

        .cta-card::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -60px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            border: 24px solid rgba(13, 148, 136, 0.08);
        }

        .cta-title {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-sub {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            position: relative;
            z-index: 1;
        }

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

        /* ===== footer ===== */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand .logo-text {
            color: #fff;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin-top: 16px;
            color: #94A3B8;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #E2E8F0;
            margin-bottom: 16px;
        }

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

        .footer-col ul li a {
            font-size: 14px;
            color: #94A3B8;
            transition: color 0.2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #64748B;
        }

        .footer-bottom p {
            margin: 0;
        }

        /* ===== mobile menu ===== */
        .mobile-menu {
            display: none;
        }

        /* ===== responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .secure-area {
                grid-template-columns: 1fr;
            }
            .secure-media img {
                height: 360px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }

            .section {
                padding: 56px 0;
            }

            .container {
                padding: 0 16px;
            }

            .main-nav {
                display: none;
            }

            .header-btn {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .mobile-menu {
                display: block;
                position: fixed;
                top: var(--header-h);
                right: 0;
                bottom: 0;
                width: 280px;
                background: #fff;
                box-shadow: -8px 0 24px rgba(15, 23, 42, 0.12);
                padding: 32px 24px;
                z-index: 999;
                transform: translateX(100%);
                transition: transform 0.3s ease;
            }

            .mobile-menu.open {
                transform: translateX(0);
            }

            .mobile-menu .nav-link {
                display: block;
                padding: 12px 16px;
                font-size: 16px;
                font-weight: 500;
                color: var(--text-secondary);
                border-radius: 10px;
                margin-bottom: 8px;
            }

            .mobile-menu .nav-link:hover,
            .mobile-menu .nav-link.active {
                color: var(--primary);
                background: var(--primary-light);
            }

            .mobile-menu .btn {
                width: 100%;
                margin-top: 20px;
            }

            .banner {
                padding: calc(var(--header-h) + 48px) 16px 56px;
                min-height: 480px;
            }

            .banner-title {
                font-size: clamp(28px, 7vw, 36px);
            }

            .banner-desc {
                font-size: 16px;
            }

            .banner-actions {
                flex-direction: column;
                gap: 12px;
            }

            .banner-actions .btn {
                width: 100%;
            }

            .stats-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .stat-card {
                padding: 28px 24px;
            }

            .stat-num {
                font-size: 34px;
            }

            .timeline {
                padding-left: 0;
            }

            .timeline::before {
                left: 24px;
            }

            .timeline-item {
                padding-left: 68px;
                padding-bottom: 28px;
            }

            .timeline-number {
                width: 48px;
                height: 48px;
                font-size: 14px;
            }

            .timeline-content {
                padding: 20px;
            }

            .timeline-content h3 {
                font-size: 17px;
            }

            .timeline-content p {
                font-size: 14px;
            }

            .secure-media img {
                height: 260px;
            }

            .secure-item {
                padding: 18px;
            }

            .faq-list {
                gap: 10px;
            }

            .faq-question {
                padding: 18px 16px;
                font-size: 15px;
            }

            .faq-answer-inner {
                padding: 14px 0 18px;
                font-size: 14px;
            }

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

            .cta-card .btn {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 32px;
            }

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

        @media (min-width: 768px) and (max-width: 1024px) {
            .main-nav .nav-link {
                padding: 8px 12px;
                font-size: 14px;
            }
        }