/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
    --primary: #2268E4;
    --primary-hover: #174FC0;
    --primary-light: #EDF4FF;
    --accent: #F0A33A;
    --accent-hover: #D98F2C;
    --success: #1C9D6B;
    --text-main: #17233D;
    --text-secondary: #4E5F78;
    --text-muted: #8798AD;
    --border: #DCE5F0;
    --divider: #EBF0F6;
    --bg-main: #F4F8FC;
    --bg-secondary: #EBF2F9;
    --card-bg: #FFFFFF;
    --radius-card: 14px;
    --radius-btn: 10px;
    --radius-input: 10px;
    --shadow: 0 8px 24px rgba(17, 35, 66, 0.06);
    --shadow-hover: 0 14px 40px rgba(17, 35, 66, 0.11);
    --section-padding: 96px;
}

/* ===== 基础 Reset ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
    background: var(--bg-main);
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
}
a:hover {
    color: var(--primary-hover);
}
button,
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
}
ul,
ol {
    list-style: none;
}

/* ===== 通用容器与区块 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
.section {
    padding: var(--section-padding) 0;
}
.section-head {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 56px;
}
.section-head h2 {
    font-size: clamp(22px, 3vw, 32px);
    font-weight: 800;
    line-height: 1.35;
    color: var(--text-main);
    letter-spacing: -0.5px;
}
.section-head p {
    margin-top: 14px;
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
}
.section-sub {
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 8px;
}
.bg-alt {
    background: var(--bg-secondary);
}
.bg-white {
    background: var(--card-bg);
}

/* ===== 悬浮胶囊导航 ===== */
.floating-nav {
    position: fixed;
    top: 14px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 32px);
    max-width: 1280px;
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(220, 229, 240, 0.9);
    border-radius: 999px;
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: box-shadow 0.3s ease, background 0.3s ease;
}
.floating-nav.scrolled {
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 10px 28px rgba(17, 35, 66, 0.1);
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 8px 8px 8px 24px;
    border-radius: 999px;
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 800;
    color: var(--text-main);
    white-space: nowrap;
}
.brand i {
    font-size: 22px;
    color: var(--primary);
}
.brand:hover {
    color: var(--text-main);
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 2px;
}
.nav-links a {
    display: inline-flex;
    align-items: center;
    padding: 9px 16px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    line-height: 1.4;
    white-space: nowrap;
    transition: all 0.2s ease;
}
.nav-links a:hover {
    background: var(--primary-light);
    color: var(--primary);
}
.nav-links a.active {
    background: var(--primary-light);
    color: var(--primary);
}
.nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    padding: 0 24px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    white-space: nowrap;
    transition: all 0.2s ease;
}
.nav-cta:hover {
    background: var(--primary-hover);
    color: #fff;
    transform: translateY(-1px);
}
.hamburger {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 18px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s ease;
}
.hamburger:hover {
    background: #DCE9FF;
}

/* ===== Hero 首屏 ===== */
.hero {
    position: relative;
    padding: 160px 0 80px;
    background: linear-gradient(135deg, rgba(237, 244, 255, 0.94), rgba(255, 255, 255, 0.88)), url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
    overflow: hidden;
}
.hero::after {
    content: '';
    position: absolute;
    right: -120px;
    top: -80px;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(34, 104, 228, 0.1), transparent 70%);
    pointer-events: none;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1.08fr 0.92fr;
    gap: 56px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 999px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}
.hero h1 {
    font-size: clamp(30px, 4.6vw, 46px);
    font-weight: 800;
    line-height: 1.25;
    color: var(--text-main);
    letter-spacing: -1px;
}
.hero-sub {
    margin-top: 20px;
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.75;
    max-width: 520px;
}
.hero-btns {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 34px;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    padding: 0 28px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}
.btn i {
    margin-left: 8px;
    font-size: 14px;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(34, 104, 228, 0.25);
}
.btn-primary:hover {
    background: var(--primary-hover);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(34, 104, 228, 0.3);
}
.btn-primary:active {
    transform: translateY(0);
    box-shadow: none;
}
.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}
.btn-secondary:hover {
    background: var(--primary-light);
    color: var(--primary);
    transform: translateY(-2px);
}
.btn-secondary:active {
    transform: translateY(0);
}
.btn-accent {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 14px rgba(240, 163, 58, 0.25);
}
.btn-accent:hover {
    background: var(--accent-hover);
    color: #fff;
    transform: translateY(-2px);
}
.hero-visual {
    position: relative;
}
.hero-visual img {
    width: 100%;
    border-radius: 20px;
    box-shadow: var(--shadow-hover);
    object-fit: cover;
}
.hero-float {
    position: absolute;
    left: -20px;
    bottom: -18px;
    background: #fff;
    border-radius: 14px;
    padding: 16px 20px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
}
.hero-float i {
    font-size: 22px;
    color: var(--success);
}

/* ===== 服务亮点四卡片 ===== */
.feat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: -40px;
    position: relative;
    z-index: 2;
}
.feat-card {
    background: var(--card-bg);
    border-radius: var(--radius-card);
    padding: 28px 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--divider);
    transition: all 0.25s ease;
}
.feat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.feat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 16px;
}
.feat-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.5;
}
.feat-card p {
    margin-top: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.65;
}

/* ===== 权益对比表 ===== */
.compare-wrap {
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--divider);
}
.table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.compare-table {
    width: 100%;
    min-width: 640px;
    border-collapse: collapse;
    font-size: 14px;
}
.compare-table thead {
    background: var(--bg-secondary);
}
.compare-table th {
    padding: 18px 20px;
    text-align: center;
    font-weight: 700;
    color: var(--text-main);
    border-bottom: 1px solid var(--divider);
    white-space: nowrap;
}
.compare-table th:first-child {
    text-align: left;
    font-size: 15px;
}
.compare-table td {
    padding: 16px 20px;
    text-align: center;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--divider);
    line-height: 1.6;
}
.compare-table td:first-child {
    text-align: left;
    font-weight: 600;
    color: var(--text-main);
}
.compare-table tr:last-child td {
    border-bottom: none;
}
.compare-table .highlight {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 700;
    position: relative;
}
.compare-tag {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 2px 10px;
    border-radius: 6px;
    margin-left: 4px;
    vertical-align: middle;
}

/* ===== 等级亮点 ===== */
.tier-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.tier-card {
    background: var(--card-bg);
    border-radius: var(--radius-card);
    padding: 32px 24px 28px;
    border: 1px solid var(--divider);
    box-shadow: var(--shadow);
    position: relative;
    transition: all 0.25s ease;
    overflow: hidden;
}
.tier-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--divider);
}
.tier-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.tier-card.featured {
    border-color: var(--accent);
}
.tier-card.featured::before {
    background: var(--accent);
}
.tier-card.featured::after {
    content: '推荐';
    position: absolute;
    top: 16px;
    right: -22px;
    background: var(--accent);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 4px 28px;
    transform: rotate(45deg);
}
.tier-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 12px;
    border-radius: 6px;
    margin-bottom: 14px;
}
.tier-card h3 {
    font-size: 20px;
    font-weight: 800;
    color: var(--text-main);
}
.tier-desc {
    margin-top: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    min-height: 72px;
}
.tier-points {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--divider);
}
.tier-points li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.65;
    padding: 4px 0;
}
.tier-points li i {
    color: var(--success);
    font-size: 14px;
    margin-top: 3px;
}

/* ===== 专属内容预览 ===== */
.preview-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 40px;
    align-items: stretch;
}
.preview-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.preview-card {
    background: var(--card-bg);
    border-radius: var(--radius-card);
    overflow: hidden;
    border: 1px solid var(--divider);
    box-shadow: var(--shadow);
    transition: all 0.25s ease;
    position: relative;
}
.preview-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
}
.preview-cover {
    position: relative;
    height: 170px;
    overflow: hidden;
}
.preview-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.preview-card:hover .preview-cover img {
    transform: scale(1.04);
}
.preview-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(23, 35, 61, 0.1), rgba(23, 35, 61, 0.55));
}
.preview-lock {
    position: absolute;
    right: 12px;
    bottom: 12px;
    background: rgba(255, 255, 255, 0.92);
    color: var(--primary);
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    z-index: 2;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}
.preview-card-body {
    padding: 18px;
}
.preview-card-body h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.5;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.preview-card-body p {
    margin-top: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.preview-card-body .unlock-tip {
    margin-top: 12px;
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    background: #FFF6E9;
    padding: 4px 12px;
    border-radius: 6px;
}
.preview-side {
    background: var(--bg-secondary);
    border-radius: var(--radius-card);
    padding: 36px 32px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    border: 1px solid var(--divider);
}
.preview-side .side-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
}
.preview-side h3 {
    font-size: 24px;
    font-weight: 800;
    line-height: 1.4;
    color: var(--text-main);
}
.preview-side p {
    margin-top: 14px;
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.75;
}
.preview-side .btn {
    margin-top: 24px;
    align-self: flex-start;
}

/* ===== 最新信息动态 (CMS) ===== */
.news-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}
.news-item {
    display: flex;
    background: var(--card-bg);
    border-radius: var(--radius-card);
    overflow: hidden;
    border: 1px solid var(--divider);
    box-shadow: var(--shadow);
    transition: all 0.25s ease;
    min-height: 160px;
}
.news-item:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}
.news-cover {
    flex-shrink: 0;
    width: 160px;
    background-size: cover;
    background-position: center;
    position: relative;
    display: block;
}
.news-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(23, 35, 61, 0.05), rgba(23, 35, 61, 0.15));
}
.news-body {
    padding: 18px 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}
.news-badge {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 6px;
}
.news-meta time {
    font-size: 13px;
    color: var(--text-muted);
}
.news-body h3 {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.5;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.news-body h3 a {
    color: var(--text-main);
}
.news-body h3 a:hover {
    color: var(--primary);
}
.news-body p {
    margin-top: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.read-more {
    margin-top: 10px;
    font-size: 13px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
}
.read-more i {
    transition: transform 0.2s ease;
}
.read-more:hover i {
    transform: translateX(4px);
}
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 24px;
    background: var(--card-bg);
    border-radius: var(--radius-card);
    border: 1px dashed var(--border);
    color: var(--text-muted);
}
.empty-state i {
    font-size: 42px;
    margin-bottom: 12px;
    color: var(--border);
}
.empty-state p {
    font-size: 15px;
}

/* ===== FAQ 手风琴 ===== */
.faq-list {
    max-width: 860px;
    margin: 0 auto;
    background: var(--card-bg);
    border-radius: var(--radius-card);
    border: 1px solid var(--divider);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.faq-item {
    border-bottom: 1px solid var(--divider);
}
.faq-item:last-child {
    border-bottom: none;
}
.faq-q {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 0 24px;
    min-height: 56px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-main);
    transition: background 0.2s ease;
}
.faq-q:hover {
    background: var(--primary-light);
}
.faq-q .faq-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all 0.25s ease;
}
.faq-item.active .faq-q .faq-icon {
    background: var(--primary);
    color: #fff;
    transform: rotate(45deg);
}
.faq-a {
    display: none;
    padding: 0 24px 20px;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}
.faq-item.active .faq-a {
    display: block;
}

/* ===== CTA 横幅 ===== */
.cta-section {
    padding: 72px 0;
    background: linear-gradient(135deg, var(--bg-secondary), #E9F2FC);
    border-radius: 28px;
    margin: 0 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-section::after {
    content: '';
    position: absolute;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: rgba(34, 104, 228, 0.08);
    top: -110px;
    right: -60px;
}
.cta-inner {
    position: relative;
    z-index: 1;
    max-width: 640px;
    margin: 0 auto;
    padding: 0 24px;
}
.cta-inner h2 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 800;
    line-height: 1.4;
    color: var(--text-main);
}
.cta-inner p {
    margin-top: 14px;
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
}
.cta-btns {
    margin-top: 28px;
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.cta-login {
    margin-top: 18px;
    font-size: 14px;
    color: var(--text-muted);
}
.cta-login a {
    color: var(--primary);
    font-weight: 600;
}

/* ===== 页脚 ===== */
.site-footer {
    background: #0F1C33;
    color: #AEBACB;
    padding: 64px 0 0;
    margin-top: 80px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.9fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand {
    font-size: 20px;
    font-weight: 800;
    color: #fff;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
.footer-brand i {
    color: var(--primary);
}
.footer-brand:hover {
    color: #fff;
}
.footer-desc {
    margin-top: 14px;
    font-size: 14px;
    line-height: 1.75;
    color: #8A9AB0;
    max-width: 320px;
}
.footer-col h4 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
}
.footer-col ul li {
    margin-bottom: 12px;
}
.footer-col ul li a {
    color: #8A9AB0;
    font-size: 14px;
    transition: color 0.2s ease;
}
.footer-col ul li a:hover {
    color: #9CB8FF;
}
.footer-contact {
    font-size: 14px;
    color: #8A9AB0;
    line-height: 2;
}
.footer-contact i {
    margin-right: 8px;
    color: var(--primary);
    width: 18px;
}
.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 14px;
    color: #6A7C95;
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
    :root {
        --section-padding: 64px;
    }
    .floating-nav {
        width: calc(100% - 24px);
    }
    .nav-inner {
        padding: 8px 8px 8px 20px;
    }
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: calc(100% + 8px);
        left: 8px;
        right: 8px;
        background: rgba(255, 255, 255, 0.98);
        border-radius: 22px;
        padding: 12px;
        box-shadow: 0 14px 40px rgba(17, 35, 66, 0.15);
        border: 1px solid var(--divider);
        gap: 4px;
        align-items: stretch;
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.25s ease;
    }
    .nav-links.open {
        display: flex;
        opacity: 1;
        pointer-events: auto;
    }
    .nav-links a {
        padding: 12px 16px;
        font-size: 16px;
        border-radius: 12px;
    }
    .nav-cta {
        display: none;
    }
    .hamburger {
        display: inline-flex;
    }
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .hero {
        padding: 140px 0 60px;
    }
    .feat-grid {
        grid-template-columns: 1fr 1fr;
        margin-top: 32px;
    }
    .tier-grid {
        grid-template-columns: 1fr 1fr;
    }
    .preview-grid {
        grid-template-columns: 1fr;
    }
    .news-list {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 639px) {
    .container {
        padding: 0 16px;
    }
    .hero {
        padding: 120px 0 48px;
    }
    .hero-sub {
        font-size: 16px;
    }
    .hero-btns .btn {
        flex: 1;
        min-width: 140px;
    }
    .feat-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .tier-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .preview-cards {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .news-item {
        flex-direction: column;
    }
    .news-cover {
        width: 100%;
        height: 130px;
    }
    .news-body {
        padding: 16px;
    }
    .news-body h3 {
        font-size: 16px;
        white-space: normal;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
    }
    .faq-q {
        padding: 0 16px;
        font-size: 14px;
    }
    .faq-a {
        padding: 0 16px 16px;
    }
    .cta-section {
        margin: 0 16px;
        padding: 56px 0;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .hero-float {
        display: none;
    }
}

/* ===== Foundation 辅助重写 ===== */
.grid-container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
}
@media (max-width: 639px) {
    .grid-container {
        padding-left: 16px;
        padding-right: 16px;
    }
}

/* roulang page: category1 */
:root {
            --primary: #2268E4;
            --primary-hover: #174FC0;
            --primary-light: #EDF4FF;
            --accent: #F0A33A;
            --accent-hover: #d88f2b;
            --success: #1C9D6B;
            --bg: #F4F8FC;
            --bg-alt: #EBF2F9;
            --surface: #FFFFFF;
            --text-main: #17233D;
            --text-sub: #4E5F78;
            --text-muted: #8798AD;
            --border: #DCE5F0;
            --border-divider: #EBF0F6;
            --navy: #0F1C33;
            --radius: 14px;
            --radius-btn: 10px;
            --radius-nav: 999px;
            --radius-sm: 6px;
            --shadow: 0 8px 24px rgba(17, 35, 66, 0.06);
            --shadow-hover: 0 14px 40px rgba(17, 35, 66, 0.11);
            --spacing-section: clamp(56px, 8vw, 96px);
            --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            display: block;
            border-radius: var(--radius);
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

        ul,
        ol {
            list-style-position: inside;
        }

        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.35;
            color: var(--text-main);
        }

        h1 {
            font-size: clamp(30px, 4.6vw, 46px);
            font-weight: 800;
            line-height: 1.25;
        }

        h2 {
            font-size: clamp(22px, 3vw, 32px);
            margin-bottom: 16px;
        }

        h3 {
            font-size: 18px;
            line-height: 1.5;
        }

        p {
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.75;
        }

        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

        /* ── 悬浮胶囊导航 ── */
        .floating-nav {
            position: fixed;
            top: 14px;
            left: 50%;
            transform: translateX(-50%);
            width: min(1280px, calc(100% - 32px));
            z-index: 1000;
            background: rgba(255, 255, 255, 0.86);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(220, 229, 240, 0.9);
            border-radius: var(--radius-nav);
            box-shadow: 0 6px 20px rgba(17, 35, 66, 0.06);
            padding: 10px 20px;
            transition: box-shadow 0.3s ease, background 0.3s ease;
        }

        .floating-nav.scrolled {
            background: rgba(255, 255, 255, 0.95);
            box-shadow: 0 10px 28px rgba(17, 35, 66, 0.10);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            white-space: nowrap;
        }

        .brand i {
            color: var(--primary);
            font-size: 22px;
        }

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

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }

        .nav-links::-webkit-scrollbar {
            display: none;
        }

        .nav-links a {
            display: inline-block;
            padding: 8px 14px;
            border-radius: var(--radius-nav);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-sub);
            white-space: nowrap;
            transition: background 0.2s ease, color 0.2s ease;
        }

        .nav-links a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

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

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: var(--radius-nav);
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(34, 104, 228, 0.25);
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 20px;
            color: var(--text-main);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
        }

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

        /* 移动端导航面板 */
        .nav-mobile-panel {
            display: none;
            flex-direction: column;
            padding: 10px 0 6px;
            border-top: 1px solid var(--border-divider);
            margin-top: 10px;
        }

        .nav-mobile-panel.open {
            display: flex;
        }

        .nav-mobile-panel a {
            display: block;
            padding: 12px 14px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-sub);
            border-radius: 10px;
            transition: background 0.2s ease, color 0.2s ease;
        }

        .nav-mobile-panel a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .nav-mobile-panel a.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-mobile-panel .nav-cta-mobile {
            margin: 8px 14px 4px;
            text-align: center;
            background: var(--primary);
            color: #fff;
            padding: 12px;
            border-radius: 10px;
        }

        /* ── 页面主体顶部留白 ── */
        .page-main {
            padding-top: 92px;
        }

        /* ── 页面横幅 HERO ── */
        .page-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(244, 248, 252, 0.98), rgba(237, 244, 255, 0.90)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            padding: 90px 0 70px;
            border-bottom: 1px solid var(--border-divider);
        }

        .page-banner .breadcrumb {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 18px;
        }

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

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

        .page-banner .breadcrumb i {
            font-size: 12px;
            margin: 0 6px;
            opacity: 0.6;
        }

        .page-banner .banner-subtitle {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 720px;
            margin-top: 16px;
            line-height: 1.8;
        }

        .banner-actions {
            display: flex;
            gap: 14px;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        /* ── 按钮体系 ── */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(34, 104, 228, 0.22);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: 1px solid var(--primary);
            cursor: pointer;
            transition: background 0.2s ease, transform 0.2s ease, border-color 0.2s ease;
        }

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

        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(240, 163, 58, 0.22);
        }

        /* ── 访问方式卡片 ── */
        .section-header {
            text-align: center;
            margin-bottom: 44px;
        }

        .section-header p {
            max-width: 640px;
            margin: 8px auto 0;
            font-size: 15px;
            color: var(--text-sub);
        }

        .access-cards .card-item {
            background: var(--surface);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: box-shadow 0.25s ease, transform 0.25s ease;
            height: 100%;
        }

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

        .access-cards .card-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 22px;
            margin-bottom: 16px;
        }

        .access-cards h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .access-cards p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
        }

        /* ── 流程步骤 ── */
        .process-section {
            background: var(--bg-alt);
            border-top: 1px solid var(--border-divider);
            border-bottom: 1px solid var(--border-divider);
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 30px;
        }

        .step-item {
            position: relative;
            background: var(--surface);
            border-radius: var(--radius);
            padding: 28px 22px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            text-align: center;
        }

        .step-item .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 14px;
        }

        .step-item h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 8px;
        }

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

        .step-item::after {
            content: '\f054';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            top: 50%;
            right: -18px;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 14px;
            z-index: 2;
        }

        .step-item:last-child::after {
            display: none;
        }

        /* ── 场景图文 ── */
        .scenario-section {
            background: var(--surface);
            padding: 80px 0;
        }

        .scenario-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .scenario-image img {
            border-radius: var(--radius);
            box-shadow: var(--shadow-hover);
            width: 100%;
            height: auto;
            object-fit: cover;
        }

        .scenario-content h2 {
            margin-bottom: 20px;
        }

        .scenario-content .scenario-list {
            margin-top: 18px;
        }

        .scenario-content .scenario-list li {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-divider);
            font-size: 15px;
            color: var(--text-sub);
        }

        .scenario-content .scenario-list li:last-child {
            border-bottom: none;
        }

        .scenario-content .scenario-list i {
            color: var(--success);
            font-size: 16px;
            margin-top: 4px;
            flex-shrink: 0;
        }

        .scenario-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: var(--radius-sm);
            margin-bottom: 14px;
        }

        /* ── 安全提示 ── */
        .security-section {
            background: var(--bg);
            padding: var(--spacing-section) 0;
        }

        .security-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-left: 4px solid var(--success);
            border-radius: var(--radius);
            padding: 32px;
            box-shadow: var(--shadow);
        }

        .security-card h3 {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 19px;
            margin-bottom: 14px;
        }

        .security-card h3 i {
            color: var(--success);
        }

        .security-card ul {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px 32px;
            margin-top: 12px;
        }

        .security-card ul li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
        }

        .security-card ul li i {
            color: var(--success);
            font-size: 13px;
            margin-top: 5px;
            flex-shrink: 0;
        }

        /* ── FAQ 手风琴 ── */
        .faq-section {
            background: var(--bg-alt);
            border-top: 1px solid var(--border-divider);
            border-bottom: 1px solid var(--border-divider);
            padding: var(--spacing-section) 0;
        }

        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow 0.2s ease;
        }

        .faq-item:hover {
            box-shadow: var(--shadow);
        }

        .faq-item.open {
            box-shadow: var(--shadow);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 18px 24px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            user-select: none;
            transition: background 0.2s ease;
        }

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

        .faq-question .faq-icon {
            font-size: 16px;
            color: var(--primary);
            transition: transform 0.25s ease;
            flex-shrink: 0;
            margin-left: 16px;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            border-top: 1px solid var(--border-divider);
            margin-top: 0;
        }

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

        .faq-item.open .faq-answer .faq-answer-inner {
            padding-top: 14px;
        }

        /* ── CTA 区块 ── */
        .cta-section {
            padding: var(--spacing-section) 0;
            background: linear-gradient(180deg, var(--bg) 0%, #fff 100%);
        }

        .cta-box {
            background: linear-gradient(135deg, var(--primary-light), #fff);
            border: 1px solid var(--border);
            border-radius: 24px;
            padding: 56px 48px;
            text-align: center;
            box-shadow: var(--shadow);
        }

        .cta-box h2 {
            font-size: clamp(22px, 3vw, 30px);
            margin-bottom: 12px;
        }

        .cta-box p {
            max-width: 560px;
            margin: 0 auto 28px;
            font-size: 15px;
            color: var(--text-sub);
        }

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

        .cta-box .cta-link {
            display: inline-block;
            margin-top: 16px;
            font-size: 14px;
            color: var(--text-muted);
        }

        .cta-box .cta-link a {
            color: var(--primary);
            font-weight: 600;
        }

        /* ── 页脚 ── */
        .site-footer {
            background: var(--navy);
            padding: 64px 0 28px;
            color: #b8c6dc;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand i {
            color: var(--primary);
        }

        .footer-desc {
            font-size: 14px;
            color: #8aa0bb;
            line-height: 1.7;
            max-width: 360px;
        }

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

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

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

        .footer-col ul a {
            color: #8aa0bb;
            font-size: 14px;
            transition: color 0.2s ease;
        }

        .footer-col ul a:hover {
            color: #9db8e8;
        }

        .footer-contact p {
            color: #8aa0bb;
            font-size: 14px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-contact i {
            color: var(--primary);
            width: 16px;
            text-align: center;
            flex-shrink: 0;
        }

        .footer-bottom {
            padding-top: 24px;
            text-align: center;
            font-size: 13px;
            color: #6b7f9a;
        }

        .footer-bottom a {
            color: #6b7f9a;
        }

        /* ── 响应式 ── */
        @media (max-width: 1023px) {
            .nav-links {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .hamburger {
                display: block;
            }

            .nav-mobile-panel {
                display: none;
            }

            .nav-mobile-panel.open {
                display: flex;
            }

            .process-steps {
                grid-template-columns: 1fr 1fr;
            }

            .step-item::after {
                display: none;
            }

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

            .security-card ul {
                grid-template-columns: 1fr;
            }

            .access-cards .card-item {
                padding: 24px 18px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }

            .page-banner {
                padding: 80px 0 56px;
            }
        }

        @media (max-width: 639px) {
            .container-custom {
                padding: 0 16px;
            }

            .floating-nav {
                width: calc(100% - 20px);
                top: 10px;
                padding: 8px 14px;
            }

            .page-main {
                padding-top: 72px;
            }

            .page-banner {
                padding: 60px 0 44px;
            }

            .page-banner .banner-subtitle {
                font-size: 15px;
            }

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

            .banner-actions .btn-primary,
            .banner-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }

            .process-steps {
                grid-template-columns: 1fr;
            }

            .section-header {
                margin-bottom: 32px;
            }

            .cta-box {
                padding: 36px 22px;
            }

            .cta-box .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-box .cta-actions .btn-primary,
            .cta-box .cta-actions .btn-accent {
                width: 100%;
                justify-content: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                font-size: 12px;
            }

            .security-card {
                padding: 24px 20px;
            }

            .access-cards {
                display: grid;
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .scenario-section {
                padding: 60px 0;
            }

            .section {
                padding: 60px 0;
            }
        }

        @media (min-width: 640px) and (max-width: 1023px) {
            .access-cards {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }

        @media (min-width: 1024px) {
            .access-cards {
                display: grid;
                grid-template-columns: 1fr 1fr 1fr 1fr;
                gap: 24px;
            }
        }

        /* 焦点可见性 */
        a:focus-visible,
        button:focus-visible,
        .faq-question:focus-visible {
            outline: 3px solid rgba(34, 104, 228, 0.4);
            outline-offset: 2px;
        }

        .btn-primary:focus-visible,
        .btn-secondary:focus-visible,
        .btn-accent:focus-visible {
            outline: 3px solid rgba(34, 104, 228, 0.35);
            outline-offset: 2px;
        }

/* roulang page: article */
:root {
  --bg: #F4F8FC;
  --bg-alt: #EBF2F9;
  --card: #FFFFFF;
  --primary: #2268E4;
  --primary-hover: #174FC0;
  --primary-light: #EDF4FF;
  --accent: #F0A33A;
  --success: #1C9D6B;
  --text-main: #17233D;
  --text-sub: #4E5F78;
  --text-weak: #8798AD;
  --border: #DCE5F0;
  --border-light: #EBF0F6;
  --shadow: 0 8px 24px rgba(17, 35, 66, 0.06);
  --shadow-hover: 0 14px 40px rgba(17, 35, 66, 0.11);
  --radius-card: 14px;
  --radius-btn: 10px;
  --radius-pill: 999px;
  --footer-bg: #0F1C33;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color .2s, background .2s, box-shadow .2s, transform .2s; }
a:hover { color: var(--primary-hover); }
img { max-width: 100%; height: auto; }
button, input { font-family: inherit; }

/* ===== 悬浮胶囊导航 ===== */
.floating-nav {
  position: fixed;
  top: 14px;
  left: 0;
  right: 0;
  z-index: 1000;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.86);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(220,229,240,0.9);
  border-radius: var(--radius-pill);
  padding: 8px 24px;
  box-shadow: 0 6px 20px rgba(17,35,66,0.06);
  transition: box-shadow .3s, background .3s;
}
.nav-inner.scrolled {
  box-shadow: 0 10px 28px rgba(17,35,66,0.10);
  background: rgba(255,255,255,0.95);
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 18px;
  color: var(--text-main);
  letter-spacing: -0.3px;
}
.brand i { color: var(--primary); font-size: 22px; }
.brand:hover { color: var(--text-main); }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  color: var(--text-sub);
  font-size: 14px;
  font-weight: 600;
}
.nav-links a:hover { background: var(--primary-light); color: var(--primary); }
.nav-links a.active { background: var(--primary-light); color: var(--primary); }
.nav-cta {
  background: var(--primary);
  color: #fff !important;
  padding: 9px 22px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.nav-cta:hover {
  background: var(--primary-hover);
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(34,104,228,0.25);
}
.hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 22px;
  color: var(--text-main);
  cursor: pointer;
  padding: 6px 8px;
  border-radius: 8px;
  width: 44px;
  height: 44px;
}
.hamburger:focus { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ===== 面包屑 ===== */
.breadcrumb {
  max-width: 760px;
  margin: 0 auto 12px;
  font-size: 13px;
  color: var(--text-weak);
}
.breadcrumb a { color: var(--text-sub); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { margin: 0 8px; color: var(--border); }
.breadcrumb .current { color: var(--text-weak); }

/* ===== 文章主体卡片 ===== */
.article-wrap {
  background: var(--card);
  border-radius: 20px;
  margin: 120px 0 0;
  padding: 48px 40px;
  box-shadow: var(--shadow);
}
.article-head {
  max-width: 760px;
  margin: 0 auto 32px;
}
.badge {
  display: inline-flex;
  align-items: center;
  background: var(--primary-light);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 700;
  gap: 6px;
}
.article-title {
  font-size: clamp(26px, 3.2vw, 36px);
  line-height: 1.3;
  margin: 16px 0 16px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.6px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--text-weak);
  font-size: 13px;
  align-items: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-light);
}
.article-meta i { margin-right: 5px; color: var(--text-weak); }
.article-meta .share-link { color: var(--text-sub); cursor: pointer; }
.article-meta .share-link:hover { color: var(--primary); }

/* ===== 正文阅读区 ===== */
.article-content {
  max-width: 760px;
  margin: 0 auto;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-sub);
}
.article-content p { margin: 0 0 18px; }
.article-content h2 {
  font-size: clamp(20px, 2.2vw, 26px);
  margin: 36px 0 16px;
  color: var(--text-main);
  line-height: 1.4;
  font-weight: 800;
}
.article-content h3 {
  font-size: 18px;
  margin: 28px 0 14px;
  color: var(--text-main);
  font-weight: 700;
}
.article-content img {
  border-radius: 10px;
  margin: 20px 0;
  max-width: 100%;
  height: auto;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--bg);
  padding: 16px 20px;
  border-radius: 0 10px 10px 0;
  margin: 20px 0;
  color: var(--text-sub);
}
.article-content ul,
.article-content ol { margin: 0 0 18px 20px; padding: 0; }
.article-content li { margin-bottom: 8px; }
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}
.article-content table th,
.article-content table td {
  border: 1px solid var(--border-light);
  padding: 10px 12px;
  text-align: left;
  color: var(--text-sub);
}
.article-content table th {
  background: var(--bg-alt);
  font-weight: 700;
  color: var(--text-main);
}
.article-content code {
  background: var(--bg-alt);
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 13px;
  color: var(--text-main);
}
.article-content pre {
  background: var(--footer-bg);
  color: #fff;
  padding: 20px;
  border-radius: 10px;
  overflow-x: auto;
  margin: 20px 0;
}
.article-content pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

/* ===== 按钮 ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--primary);
  color: #fff !important;
  height: 44px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-weight: 700;
  font-size: 14px;
  border: none;
  cursor: pointer;
  transition: all .2s ease;
}
.btn-primary:hover {
  background: var(--primary-hover);
  color: #fff !important;
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(34,104,228,0.22);
}
.btn-primary:active { transform: translateY(0); box-shadow: none; }
.btn-primary:focus { outline: 3px solid rgba(34,104,228,0.28); outline-offset: 2px; }

/* ===== 文章空状态 ===== */
.article-empty {
  text-align: center;
  padding: 60px 20px 40px;
}
.article-empty i {
  font-size: 48px;
  color: var(--border);
  display: block;
  margin-bottom: 16px;
}
.article-empty p {
  font-size: 16px;
  color: var(--text-sub);
  margin: 0 0 24px;
}

/* ===== 会员提示卡 ===== */
.member-tip-card {
  max-width: 760px;
  margin: 32px auto 0;
  border: 1px solid var(--primary);
  border-radius: var(--radius-card);
  background: var(--card);
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.tip-text {
  font-size: 14px;
  margin: 0;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 8px;
}
.tip-text i { color: var(--accent); font-size: 16px; }
.member-tip-btn {
  background: var(--accent);
  color: #17233D !important;
  padding: 10px 24px;
  border-radius: var(--radius-btn);
  font-weight: 700;
  font-size: 14px;
  white-space: nowrap;
  transition: all .2s;
  border: none;
  cursor: pointer;
}
.member-tip-btn:hover {
  transform: translateY(-2px);
  color: #17233D !important;
  box-shadow: 0 8px 20px rgba(240,163,58,0.3);
}

/* ===== 文末导航 ===== */
.post-nav {
  max-width: 760px;
  margin: 32px auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  flex-wrap: wrap;
}
.post-nav a {
  color: var(--text-sub);
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all .2s;
}
.post-nav a:hover { color: var(--primary); }
.post-nav .back { color: var(--text-weak); }

/* ===== 相关推荐 ===== */
.related-section {
  background: var(--bg-alt);
  padding: 80px 0;
}
.related-section h2 {
  text-align: center;
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 800;
  color: var(--text-main);
  margin: 0 0 40px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: var(--card);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .3s, box-shadow .3s;
  display: flex;
  flex-direction: column;
}
.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}
.related-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.related-body {
  padding: 20px 24px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.related-body .badge { align-self: flex-start; margin-bottom: 12px; }
.related-body h3 {
  font-size: 18px;
  margin: 0 0 10px;
  line-height: 1.5;
  font-weight: 700;
}
.related-body h3 a { color: var(--text-main); }
.related-body h3 a:hover { color: var(--primary); }
.related-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
  margin: 0;
}

/* ===== 开通会员 CTA ===== */
.cta-section {
  background: var(--bg);
  padding: 80px 0;
}
.cta-card {
  background: linear-gradient(135deg, #F4F8FC 0%, #EBF2F9 100%);
  border-radius: 24px;
  padding: 56px 48px;
  text-align: center;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.cta-card h2 {
  font-size: clamp(22px, 3vw, 32px);
  margin: 0 0 12px;
  font-weight: 800;
  color: var(--text-main);
}
.cta-card p {
  color: var(--text-sub);
  max-width: 540px;
  margin: 0 auto 28px;
  font-size: 15px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--footer-bg);
  color: rgba(255,255,255,0.8);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #fff !important;
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 4px;
}
.footer-brand i { color: #7EA8FF; font-size: 22px; }
.footer-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  line-height: 1.7;
  margin: 12px 0 0;
  max-width: 300px;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  margin: 0 0 18px;
  font-weight: 700;
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  color: rgba(255,255,255,0.65);
  font-size: 14px;
}
.footer-col a:hover { color: #7EA8FF; }
.footer-contact p {
  font-size: 14px;
  color: rgba(255,255,255,0.65);
  margin: 0 0 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-contact i { color: #7EA8FF; width: 16px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  margin-top: 8px;
}
.footer-bottom p { margin: 0; }

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 900px) {
  .nav-inner { flex-wrap: wrap; border-radius: 20px; padding: 12px 16px; }
  .hamburger { display: block; }
  .nav-cta { display: none; }
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 0 4px;
  }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; padding: 12px 16px; font-size: 16px; }
  .article-wrap { padding: 32px 20px; margin-top: 104px; }
}
@media (max-width: 639px) {
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .cta-card { padding: 40px 24px; }
  .member-tip-card { flex-direction: column; align-items: flex-start; }
  .post-nav { flex-direction: column; align-items: flex-start; gap: 12px; }
  .article-wrap { border-radius: 16px; padding: 28px 16px; margin-top: 96px; }
  .article-meta { gap: 12px; row-gap: 8px; }
}

/* roulang page: category2 */
:root {
            --bg: #F4F8FC;
            --bg-secondary: #EBF2F9;
            --card-bg: #FFFFFF;
            --primary: #2268E4;
            --primary-hover: #174FC0;
            --primary-subtle: #EDF4FF;
            --accent: #F0A33A;
            --accent-hover: #E08F1A;
            --success: #1C9D6B;
            --text-main: #17233D;
            --text-secondary: #4E5F78;
            --text-mute: #8798AD;
            --border: #DCE5F0;
            --border-table: #EBF0F6;
            --shadow-sm: 0 8px 24px rgba(17, 35, 66, 0.06);
            --shadow-lg: 0 14px 40px rgba(17, 35, 66, 0.11);
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-input: 10px;
            --radius-badge: 6px;
            --radius-pill: 999px;
            --max-width: 1280px;
            --space-section: clamp(64px, 8vw, 96px);
        }

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

        html {
            scroll-behavior: smooth;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            cursor: pointer;
        }

        .grid-container {
            max-width: var(--max-width);
            padding-left: 20px;
            padding-right: 20px;
        }

        @media screen and (min-width: 1024px) {
            .grid-container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        /* ============ 按钮体系 ============ */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            text-align: center;
            white-space: nowrap;
            transition: all 0.25s ease;
            cursor: pointer;
            border: 1px solid transparent;
        }

        .btn i {
            font-size: 14px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 6px 16px rgba(34, 104, 228, 0.28);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(34, 104, 228, 0.34);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 10px rgba(34, 104, 228, 0.22);
        }

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

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

        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 6px 16px rgba(240, 163, 58, 0.28);
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(240, 163, 58, 0.34);
        }

        .btn-lg {
            height: 48px;
            padding: 0 34px;
            font-size: 16px;
        }

        /* ============ 悬浮胶囊导航 ============ */
        .floating-nav {
            position: fixed;
            top: 14px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1000;
            width: calc(100% - 32px);
            max-width: 1280px;
            background: rgba(255, 255, 255, 0.86);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(220, 229, 240, 0.9);
            border-radius: var(--radius-pill);
            box-shadow: 0 6px 20px rgba(17, 35, 66, 0.06);
            padding: 10px 18px;
            transition: box-shadow 0.3s ease, background 0.3s ease;
        }

        .floating-nav.scrolled {
            box-shadow: 0 10px 28px rgba(17, 35, 66, 0.10);
            background: rgba(255, 255, 255, 0.96);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            flex-shrink: 0;
            letter-spacing: -0.3px;
        }

        .brand i {
            font-size: 20px;
            color: var(--primary);
        }

        .brand:hover {
            color: var(--text-main);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
            flex-wrap: nowrap;
        }

        .nav-links a {
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: background 0.2s ease, color 0.2s ease;
            white-space: nowrap;
        }

        .nav-links a:hover {
            background: var(--primary-subtle);
            color: var(--primary);
        }

        .nav-links a.active {
            background: var(--primary-subtle);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 38px;
            padding: 0 20px;
            border-radius: 999px;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: background 0.25s ease, transform 0.2s ease;
        }

        .nav-cta:hover {
            background: var(--primary-hover);
            color: #fff;
            transform: translateY(-1px);
        }

        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            align-items: center;
            justify-content: center;
            color: var(--text-main);
            font-size: 18px;
            transition: background 0.2s ease;
        }

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

        /* ============ Hero ============ */
        .hero-section {
            position: relative;
            padding: clamp(150px, 14vw, 190px) 0 clamp(60px, 7vw, 88px);
            background-image: linear-gradient(90deg, rgba(244, 248, 252, 0.96) 0%, rgba(244, 248, 252, 0.90) 55%, rgba(235, 242, 249, 0.75) 100%), url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center center;
            background-repeat: no-repeat;
        }

        .hero-grid {
            display: flex;
            align-items: center;
            gap: 48px;
        }

        .hero-content {
            flex: 1;
            max-width: 620px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 16px;
            background: var(--primary-subtle);
            color: var(--primary);
            border: 1px solid rgba(34, 104, 228, 0.12);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .hero-badge i {
            font-size: 13px;
        }

        .hero-title {
            font-size: clamp(30px, 4.6vw, 46px);
            line-height: 1.25;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -1px;
            margin-bottom: 18px;
        }

        .hero-title .highlight {
            color: var(--primary);
        }

        .hero-subtitle {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 560px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 28px;
            padding-top: 24px;
            border-top: 1px solid rgba(220, 229, 240, 0.8);
        }

        .stat-item {
            display: flex;
            flex-direction: column;
        }

        .stat-num {
            font-size: 24px;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.2;
        }

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

        .hero-visual {
            flex: 1;
            display: flex;
            justify-content: center;
        }

        .hero-card {
            width: 100%;
            max-width: 460px;
            background: var(--card-bg);
            border-radius: 18px;
            box-shadow: var(--shadow-lg);
            padding: 32px;
            border: 1px solid rgba(220, 229, 240, 0.7);
        }

        .hero-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .hero-card-title i {
            color: var(--primary);
        }

        .hero-card-sub {
            font-size: 14px;
            color: var(--text-mute);
            margin-bottom: 20px;
        }

        .hero-card-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .hero-card-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .hero-card-list li i {
            color: var(--primary);
            margin-top: 3px;
            font-size: 14px;
            flex-shrink: 0;
        }

        .hero-card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 20px;
            padding: 6px 12px;
            background: var(--primary-subtle);
            color: var(--primary);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
        }

        /* ============ 通用区段 ============ */
        .section {
            padding: var(--space-section) 0;
        }

        .section-alt {
            background: var(--bg-secondary);
        }

        .section-white {
            background: #fff;
        }

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

        .section-tag {
            display: inline-block;
            padding: 6px 14px;
            background: var(--primary-subtle);
            color: var(--primary);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: clamp(22px, 3vw, 32px);
            line-height: 1.35;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
        }

        .section-desc {
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* ============ 权益对比表 ============ */
        .compare-wrap {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(220, 229, 240, 0.8);
            overflow: hidden;
        }

        .table-scroll {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 780px;
        }

        .compare-table th,
        .compare-table td {
            padding: 16px 18px;
            text-align: left;
            border-bottom: 1px solid var(--border-table);
            font-size: 14px;
            line-height: 1.6;
        }

        .compare-table th {
            background: var(--bg);
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
        }

        .compare-table td:first-child,
        .compare-table th:first-child {
            position: sticky;
            left: 0;
            background: var(--bg);
            font-weight: 600;
            color: var(--text-main);
            min-width: 140px;
            z-index: 1;
            background-clip: padding-box;
        }

        .compare-table td {
            color: var(--text-secondary);
        }

        .compare-table tr:last-child td {
            border-bottom: none;
        }

        .compare-table .rec-col {
            background: var(--primary-subtle);
            position: relative;
        }

        .compare-table .rec-col th {
            background: var(--primary-subtle);
        }

        .rec-badge {
            display: inline-block;
            padding: 3px 10px;
            background: var(--primary);
            color: #fff;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 4px;
            white-space: nowrap;
        }

        .compare-table .col-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            display: block;
        }

        .compare-table .col-sub {
            font-size: 12px;
            color: var(--text-mute);
            font-weight: 400;
            display: block;
            margin-top: 2px;
        }

        .table-note {
            padding: 16px 20px;
            background: var(--bg);
            border-top: 1px solid var(--border-table);
            font-size: 13px;
            color: var(--text-mute);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .table-note i {
            color: var(--success);
        }

        /* ============ 等级亮点卡片 ============ */
        .tier-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .tier-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px solid rgba(220, 229, 240, 0.8);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            overflow: hidden;
        }

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

        .tier-card.featured {
            border-color: var(--accent);
            background: linear-gradient(180deg, #FFFDF8 0%, #FFFFFF 100%);
        }

        .tier-card.featured::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: var(--accent);
        }

        .tier-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-subtle);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 18px;
        }

        .tier-card.featured .tier-icon {
            background: rgba(240, 163, 58, 0.15);
            color: var(--accent);
        }

        .tier-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 6px;
        }

        .tier-tag {
            display: inline-block;
            padding: 4px 10px;
            background: var(--bg);
            border-radius: var(--radius-badge);
            font-size: 12px;
            color: var(--text-mute);
            font-weight: 500;
            margin-bottom: 14px;
            border: 1px solid var(--border);
        }

        .tier-card.featured .tier-tag {
            background: rgba(240, 163, 58, 0.12);
            color: var(--accent);
            border-color: rgba(240, 163, 58, 0.25);
        }

        .tier-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .tier-points {
            display: flex;
            flex-direction: column;
            gap: 8px;
            border-top: 1px solid var(--border-table);
            padding-top: 14px;
        }

        .tier-points li {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .tier-points li i {
            color: var(--success);
            font-size: 13px;
            margin-top: 3px;
        }

        /* ============ 专属内容预览 ============ */
        .content-preview-section {
            background: var(--bg);
        }

        .content-preview-grid {
            display: flex;
            gap: 32px;
            align-items: stretch;
        }

        .content-cards {
            flex: 1.5;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .preview-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px solid rgba(220, 229, 240, 0.8);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

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

        .preview-media {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--bg-secondary);
        }

        .preview-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .preview-lock {
            position: absolute;
            top: 12px;
            right: 12px;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: rgba(23, 35, 61, 0.65);
            backdrop-filter: blur(6px);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 14px;
        }

        .preview-info {
            padding: 16px 16px 18px;
        }

        .preview-cat {
            font-size: 12px;
            color: var(--primary);
            font-weight: 600;
            margin-bottom: 6px;
        }

        .preview-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 8px;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .preview-summary {
            font-size: 13px;
            color: var(--text-mute);
            line-height: 1.6;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        .preview-more {
            font-size: 12px;
            color: var(--text-mute);
            margin-top: 10px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .content-sidebar {
            flex: 1;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px solid rgba(220, 229, 240, 0.8);
            box-shadow: var(--shadow-sm);
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .sidebar-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--primary-subtle);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .sidebar-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            line-height: 1.35;
            margin-bottom: 12px;
        }

        .sidebar-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .sidebar-points {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 24px;
        }

        .sidebar-points li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .sidebar-points li i {
            color: var(--success);
            margin-top: 3px;
            font-size: 14px;
        }

        /* ============ 流程步骤 ============ */
        .steps-section {
            background: #fff;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .steps-grid::before {
            content: '';
            position: absolute;
            top: 44px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary) 0%, var(--primary-subtle) 100%);
            z-index: 1;
            opacity: 0.4;
        }

        .step-item {
            text-align: center;
            padding: 0 12px;
            position: relative;
            z-index: 2;
        }

        .step-num {
            width: 64px;
            height: 64px;
            margin: 0 auto 16px;
            border-radius: 50%;
            background: var(--primary-subtle);
            border: 3px solid #fff;
            box-shadow: var(--shadow-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            position: relative;
        }

        .step-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .step-desc {
            font-size: 13px;
            color: var(--text-mute);
            line-height: 1.6;
        }

        .step-item:nth-child(2) .step-num {
            background: #fff;
            border-color: var(--primary);
            color: var(--primary);
        }

        .step-item:nth-child(3) .step-num {
            background: var(--bg-secondary);
            color: var(--text-main);
        }

        .step-item:nth-child(4) .step-num {
            background: var(--primary);
            color: #fff;
        }

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

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

        .accordion {
            background: transparent;
        }

        .accordion-item {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px solid rgba(220, 229, 240, 0.8);
            box-shadow: var(--shadow-sm);
            margin-bottom: 16px;
            overflow: hidden;
            transition: box-shadow 0.3s ease;
        }

        .accordion-item.is-active {
            box-shadow: var(--shadow-lg);
            border-color: rgba(34, 104, 228, 0.3);
        }

        .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            cursor: pointer;
            background: var(--card-bg) !important;
            border-bottom: 1px solid transparent;
            position: relative;
            min-height: 56px;
        }

        .accordion-item.is-active .accordion-title {
            border-bottom-color: var(--border-table);
        }

        .accordion-title::after {
            content: '+';
            font-size: 22px;
            font-weight: 400;
            color: var(--primary);
            margin-left: 16px;
            flex-shrink: 0;
            transition: transform 0.25s ease;
            line-height: 1;
        }

        .accordion-item.is-active .accordion-title::after {
            content: '×';
            transform: rotate(45deg);
        }

        .accordion-title:hover {
            background: var(--primary-subtle) !important;
        }

        .accordion-content {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            border: none !important;
            background: var(--card-bg) !important;
        }

        /* ============ CTA ============ */
        .cta-section {
            padding: var(--space-section) 0;
            background: linear-gradient(135deg, #F4F8FC 0%, #EBF2F9 60%, #EDF4FF 100%);
        }

        .cta-box {
            max-width: 780px;
            margin: 0 auto;
            text-align: center;
            background: var(--card-bg);
            border-radius: 20px;
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(220, 229, 240, 0.8);
            padding: clamp(36px, 6vw, 56px);
        }

        .cta-title {
            font-size: clamp(22px, 3vw, 30px);
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 14px;
            line-height: 1.35;
        }

        .cta-desc {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 14px;
        }

        .cta-link {
            display: inline-block;
            margin-top: 18px;
            font-size: 14px;
            color: var(--text-mute);
        }

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

        /* ============ 页脚 ============ */
        .site-footer {
            background: #0F1C33;
            color: rgba(255, 255, 255, 0.75);
            padding-top: 56px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand i {
            color: #5C8DF2;
        }

        .footer-brand:hover {
            color: #fff;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }

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

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: #96B8F5;
        }

        .footer-contact p {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 10px;
        }

        .footer-contact p i {
            width: 16px;
            color: #5C8DF2;
            font-size: 14px;
        }

        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom p {
            margin: 0;
        }

        /* ============ 响应式 ============ */
        @media screen and (max-width: 1023px) {
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 10px);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.97);
                backdrop-filter: blur(12px);
                border-radius: 20px;
                box-shadow: var(--shadow-lg);
                border: 1px solid rgba(220, 229, 240, 0.9);
                padding: 14px;
                flex-direction: column;
                align-items: stretch;
                gap: 6px;
            }

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

            .nav-links a {
                padding: 14px 16px;
                font-size: 16px;
                border-radius: 12px;
                white-space: normal;
                text-align: left;
            }

            .hamburger {
                display: flex;
            }

            .nav-cta {
                display: none;
            }

            .hero-section {
                padding-top: 140px;
            }

            .hero-grid {
                flex-direction: column;
            }

            .hero-visual {
                width: 100%;
            }

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

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px 24px;
            }

            .steps-grid::before {
                display: none;
            }

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

            .footer-grid {
                gap: 32px;
            }
        }

        @media screen and (max-width: 767px) {
            .content-preview-grid {
                flex-direction: column;
            }

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

        @media screen and (max-width: 639px) {
            body {
                font-size: 15px;
            }

            .floating-nav {
                padding: 8px 14px;
            }

            .brand {
                font-size: 17px;
            }

            .brand i {
                font-size: 17px;
            }

            .hero-section {
                padding-top: 120px;
            }

            .hero-title {
                font-size: 28px;
            }

            .hero-subtitle {
                font-size: 15px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

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

            .hero-stats {
                gap: 20px;
            }

            .stat-num {
                font-size: 20px;
            }

            .hero-card {
                padding: 24px;
            }

            .section {
                padding: 56px 0;
            }

            .section-head {
                margin-bottom: 32px;
            }

            .compare-table th,
            .compare-table td {
                padding: 12px 14px;
                font-size: 13px;
            }

            .compare-table td:first-child,
            .compare-table th:first-child {
                min-width: 105px;
            }

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

            .tier-card {
                padding: 22px 20px;
            }

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

            .step-item {
                padding: 0;
            }

            .accordion-title {
                padding: 16px 18px;
                font-size: 14px;
            }

            .accordion-content {
                padding: 0 18px 16px;
                font-size: 14px;
            }

            .cta-box {
                padding: 28px 20px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-contact p {
                font-size: 13px;
            }

            .content-sidebar {
                padding: 24px;
            }

            .sidebar-title {
                font-size: 20px;
            }
        }

        @media screen and (max-width: 420px) {
            .hero-title {
                font-size: 25px;
            }

            .hero-card-list li {
                font-size: 13px;
            }

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

            .table-note {
                font-size: 12px;
            }
        }

        /* ============ 焦点 ============ */
        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 3px solid rgba(34, 104, 228, 0.35);
            outline-offset: 3px;
            border-radius: 8px;
        }

        .nav-links a:focus-visible {
            outline-offset: 2px;
        }