/* roulang page: index */
/* ========== 设计变量 ========== */
:root {
    --color-primary: #3B9EFF;
    --color-primary-strong: #1F7EDB;
    --color-primary-bg: #EFF6FF;
    --color-secondary: #2E5E9E;
    --color-accent: #F59E0B;
    --color-ink: #1E293B;
    --color-ink-secondary: #64748B;
    --color-line: #E5EAF0;
    --color-surface: #FFFFFF;
    --color-surface-soft: #F8FAFC;
    --shadow-card: 0 4px 20px rgba(30, 64, 120, 0.06);
    --shadow-card-hover: 0 10px 28px rgba(30, 64, 120, 0.12);
    --radius-card: 16px;
    --radius-btn: 10px;
    --radius-input: 10px;
    --max-width: 1200px;
    --gutter: 24px;
    --space-section: 96px;
    --space-section-mobile: 56px;
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.75;
    color: var(--color-ink);
    background-color: var(--color-surface);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--color-primary); }
button { font-family: inherit; cursor: pointer; }
input, textarea { font-family: inherit; }

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

/* ========== 通用按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 48px;
    padding: 0 32px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 600;
    line-height: 1;
    border: 1px solid transparent;
    transition: all .22s ease;
    white-space: nowrap;
}
.btn:focus-visible {
    outline: 3px solid rgba(59, 158, 255, 0.25);
    outline-offset: 2px;
}
.btn-primary {
    background-color: var(--color-primary);
    color: #fff;
}
.btn-primary:hover {
    background-color: var(--color-primary-strong);
    color: #fff;
    transform: translateY(-1px);
}
.btn-primary:active {
    transform: translateY(0);
}
.btn-outline {
    background: #fff;
    border-color: var(--color-line);
    color: var(--color-primary);
}
.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary-strong);
    transform: translateY(-1px);
}
.btn-white {
    background: #fff;
    color: var(--color-secondary);
}
.btn-white:hover {
    background: var(--color-primary-bg);
    color: var(--color-secondary);
    transform: translateY(-1px);
}
.btn-sm { height: 40px; padding: 0 20px; font-size: 14px; }

/* ========== 徽章 / 标签 ========== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1.4;
}
.badge-accent { background: var(--color-accent); color: #fff; }
.badge-cat { background: var(--color-primary-bg); color: var(--color-primary-strong); }
.tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    background: var(--color-primary-bg);
    color: var(--color-primary-strong);
}

/* ========== 导航 ========== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 64px;
    z-index: 1000;
    background: transparent;
    transition: background .3s ease, box-shadow .3s ease, border-color .3s ease;
    border-bottom: 1px solid transparent;
}
.site-header.scrolled {
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom-color: var(--color-line);
    box-shadow: 0 2px 16px rgba(30, 64, 120, 0.04);
}
.header-inner {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.header-left {
    display: flex;
    align-items: center;
    gap: 28px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.brand-icon {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: #fff;
    font-size: 14px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    letter-spacing: 0;
}
.brand-text {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-ink);
    line-height: 1.2;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-ink-secondary);
    padding: 8px 12px;
    border-radius: 8px;
    transition: all .2s ease;
    position: relative;
}
.nav-link:hover {
    color: var(--color-primary-strong);
    background: var(--color-primary-bg);
}
.nav-link.active {
    color: var(--color-primary-strong);
    background: var(--color-primary-bg);
    font-weight: 600;
}
.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}
.nav-search {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    border: 1px solid var(--color-line);
    background: rgba(255, 255, 255, 0.7);
    color: var(--color-ink-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    transition: all .2s ease;
}
.nav-search:hover {
    background: var(--color-primary-bg);
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid var(--color-line);
    background: #fff;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all .2s ease;
}
.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--color-ink);
    border-radius: 2px;
    transition: all .25s ease;
}
.nav-toggle:hover { background: var(--color-primary-bg); }
.nav-toggle.active span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--color-line);
    box-shadow: 0 8px 24px rgba(30, 64, 120, 0.08);
    padding: 16px 24px 24px;
    z-index: 999;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all .25s ease;
}
.mobile-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}
.mobile-menu .nav-link {
    display: block;
    padding: 12px 16px;
    font-size: 15px;
    border-radius: 10px;
    margin-bottom: 4px;
}
.mobile-menu .nav-link.active {
    background: var(--color-primary-bg);
    color: var(--color-primary-strong);
}
.mobile-menu .btn {
    width: 100%;
    margin-top: 16px;
}

/* ========== Hero ========== */
.hero {
    background: linear-gradient(120deg, #EFF6FF 0%, #FFFFFF 60%);
    background-image:
        linear-gradient(rgba(59, 158, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 158, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    min-height: 560px;
    padding-top: 96px;
    padding-bottom: 80px;
    position: relative;
    overflow: hidden;
}
.hero .container {
    position: relative;
    z-index: 2;
}
.hero-copy {
    padding-right: 32px;
}
.hero-badge-line {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}
.hero h1 {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.25;
    color: var(--color-ink);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}
.hero-sub {
    font-size: 16px;
    color: var(--color-ink-secondary);
    line-height: 1.75;
    margin-bottom: 28px;
    max-width: 480px;
}
.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}
.hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 420px;
}
.hero-visual-img {
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    border-radius: 20px;
    opacity: 0.35;
}
.hero-card {
    position: relative;
    width: 100%;
    max-width: 420px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card-hover);
    border: 1px solid rgba(255, 255, 255, 0.6);
    padding: 24px;
}
.hero-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}
.hero-card-site {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-ink);
    display: flex;
    align-items: center;
    gap: 8px;
}
.hero-card-site i { color: var(--color-primary); }
.hero-card-status {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: #16A34A;
    background: #F0FDF4;
    border-radius: 999px;
    padding: 4px 12px;
    font-weight: 600;
}
.hero-card-status .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #16A34A;
    display: inline-block;
}
.hero-card-addr {
    background: var(--color-surface-soft);
    border: 1px solid var(--color-line);
    border-radius: 10px;
    padding: 14px 16px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}
.hero-card-addr i { color: var(--color-primary); font-size: 14px; }
.hero-card-addr span {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-ink);
}
.hero-card-list {
    list-style: none;
    display: grid;
    gap: 10px;
}
.hero-card-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--color-ink-secondary);
}
.hero-card-list li i { color: var(--color-primary); font-size: 13px; width: 16px; }

/* ========== 信任数据条 ========== */
.trust-bar {
    background: linear-gradient(120deg, #EFF6FF 0%, #FFFFFF 60%);
    padding: 24px 0 48px;
    border-bottom: 1px solid var(--color-line);
}
.trust-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1000px;
    margin: 0 auto;
}
.trust-item {
    flex: 1;
    text-align: center;
    position: relative;
    padding: 0 20px;
}
.trust-item + .trust-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 40px;
    background: var(--color-line);
}
.trust-item .num {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-ink);
    line-height: 1.3;
}
.trust-item .num span { color: var(--color-primary); }
.trust-item .label {
    font-size: 14px;
    color: var(--color-ink-secondary);
    margin-top: 4px;
}

/* ========== 区块通用 ========== */
.section { padding: var(--space-section) 0; }
.section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 52px;
}
.section-head h2 {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-ink);
    margin-bottom: 12px;
}
.section-head p {
    font-size: 14px;
    color: var(--color-ink-secondary);
    line-height: 1.7;
}
.section-white { background: var(--color-surface); }
.section-soft { background: var(--color-surface-soft); }

/* ========== 权益对比表 ========== */
.compare-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-line);
}
.compare-col {
    padding: 36px 32px;
    background: var(--color-surface);
}
.compare-col.member {
    background: var(--color-primary-bg);
    border: 2px solid var(--color-primary);
    border-radius: 0;
    position: relative;
    box-shadow: inset 0 0 0 1px rgba(59,158,255,0.1);
}
.compare-col-header {
    text-align: center;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-line);
    margin-bottom: 12px;
    position: relative;
}
.compare-col.member .compare-col-header {
    border-bottom-color: rgba(59, 158, 255, 0.2);
}
.compare-col-header .badge-recommend {
    position: absolute;
    top: -12px;
    right: -8px;
    background: var(--color-accent);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 3px 12px;
    border-radius: 999px;
}
.compare-col-header h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-ink);
}
.compare-col-header .price {
    font-size: 30px;
    font-weight: 800;
    color: var(--color-primary);
    margin-top: 8px;
}
.compare-col-header .price span {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-ink-secondary);
}
.compare-price-note { font-size: 13px; color: var(--color-ink-secondary); margin-top: 4px; }
.compare-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 0;
    border-bottom: 1px solid var(--color-line);
    font-size: 14px;
}
.compare-row:last-child { border-bottom: none; }
.compare-row .dim {
    font-weight: 600;
    color: var(--color-ink);
    flex-shrink: 0;
}
.compare-row .val {
    text-align: right;
    color: var(--color-ink-secondary);
    font-size: 13px;
    line-height: 1.5;
}
.compare-col.member .compare-row .val {
    color: var(--color-ink);
    font-weight: 500;
}
.compare-col.member .compare-row .dim { color: var(--color-primary-strong); }
.compare-col.member .compare-row { border-bottom-color: rgba(59,158,255,0.15); }
.compare-col .btn { width: 100%; margin-top: 20px; }

/* ========== 等级亮点 ========== */
.tiers-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1100px;
    margin: 0 auto;
    align-items: start;
}
.tier-card {
    background: var(--color-surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 32px 28px 28px;
    position: relative;
    overflow: hidden;
    transition: all .25s ease;
    border: 1px solid var(--color-line);
}
.tier-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-2px);
}
.tier-card.featured {
    transform: translateY(-24px);
    border-color: var(--color-primary);
    box-shadow: 0 12px 32px rgba(30, 64, 120, 0.12);
}
.tier-card.featured:hover {
    transform: translateY(-26px);
    box-shadow: 0 16px 40px rgba(30, 64, 120, 0.16);
}
.tier-bg {
    position: absolute;
    top: 0;
    right: 0;
    font-size: 72px;
    font-weight: 800;
    color: var(--color-ink);
    opacity: 0.06;
    line-height: 1;
    padding: 16px 20px;
    font-family: inherit;
}
.tier-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-ink);
    margin-bottom: 4px;
    position: relative;
}
.tier-cond {
    font-size: 14px;
    color: var(--color-ink-secondary);
    margin-bottom: 20px;
    position: relative;
}
.tier-list {
    list-style: none;
    display: grid;
    gap: 10px;
    position: relative;
}
.tier-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: var(--color-ink);
    line-height: 1.5;
}
.tier-list li .check {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 2px;
}
.tier-card.featured .tier-list li .check { background: var(--color-secondary); }

/* ========== 专属内容预览 ========== */
.content-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.content-card {
    background: var(--color-surface);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-line);
    transition: all .25s ease;
    position: relative;
}
.content-card:hover {
    box-shadow: var(--shadow-card-hover);
    transform: translateY(-4px);
}
.content-card-img {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-primary-bg);
}
.content-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .35s ease;
}
.content-card:hover .content-card-img img { transform: scale(1.03); }
.content-card-img .img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 500;
    background: var(--color-primary-bg);
}
.content-card.locked .content-card-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(30, 41, 59, 0) 30%, rgba(30, 41, 59, 0.35) 100%);
}
.lock-icon {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(30, 41, 59, 0.6);
    color: #fff;
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    backdrop-filter: blur(4px);
}
.content-card-body {
    padding: 20px;
}
.content-card-body .tag { margin-bottom: 10px; }
.content-card-body h3 {
    font-size: 17px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--color-ink);
    margin-bottom: 8px;
    transition: color .2s ease;
}
.content-card:hover .content-card-body h3 { color: var(--color-primary-strong); }
.content-card-body p {
    font-size: 14px;
    color: var(--color-ink-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.content-card-foot {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    border-top: 1px solid var(--color-line);
    background: var(--color-surface-soft);
}
.content-card-foot .btn { height: 32px; padding: 0 16px; font-size: 13px; border-radius: 8px; }

/* ========== FAQ ========== */
.faq-grid {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 48px;
    max-width: 1000px;
    margin: 0 auto;
}
.faq-side h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-ink);
    line-height: 1.3;
    margin-bottom: 12px;
}
.faq-side p {
    font-size: 14px;
    color: var(--color-ink-secondary);
    line-height: 1.7;
}
.faq-list {
    display: grid;
    gap: 12px;
}
.faq-item {
    background: var(--color-surface);
    border-radius: var(--radius-card);
    border: 1px solid var(--color-line);
    overflow: hidden;
    transition: border-color .25s ease, box-shadow .25s ease;
}
.faq-item:hover { box-shadow: var(--shadow-card); }
.faq-item[open] {
    border-color: var(--color-primary);
    box-shadow: 0 4px 16px rgba(59, 158, 255, 0.08);
}
.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    list-style: none;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-ink);
    transition: color .2s ease;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--color-primary-strong); }
.faq-item summary .faq-icon {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 1px solid var(--color-line);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--color-ink-secondary);
    transition: all .3s ease;
    flex-shrink: 0;
}
.faq-item[open] summary .faq-icon {
    transform: rotate(180deg);
    background: var(--color-primary-bg);
    border-color: var(--color-primary);
    color: var(--color-primary-strong);
}
.faq-answer {
    padding: 0 24px 20px;
    background: var(--color-surface-soft);
    font-size: 14px;
    color: var(--color-ink-secondary);
    line-height: 1.75;
    border-top: none;
}

/* ========== CTA ========== */
.cta-band {
    background-color: var(--color-secondary);
    background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
    background-size: 32px 32px;
    padding: 72px 0;
    color: #fff;
}
.cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 48px;
    flex-wrap: wrap;
}
.cta-text h2 {
    font-size: 28px;
    font-weight: 700;
    color: #fff;
    line-height: 1.3;
    margin-bottom: 10px;
}
.cta-text p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    max-width: 560px;
}
.cta-actions {
    display: flex;
    gap: 14px;
    flex-shrink: 0;
}

/* ========== 最新资讯 ========== */
.news-section { background: var(--color-surface-soft); }
.news-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    max-width: 1100px;
    margin: 0 auto;
}
.news-feature {
    background: var(--color-surface);
    border-radius: var(--radius-card);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--color-line);
    transition: all .25s ease;
    display: flex;
    flex-direction: column;
}
.news-feature:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
.news-feature-img {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--color-primary-bg);
}
.news-feature-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.news-feature-img .img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 500;
}
.news-feature-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.news-feature-body .tag { align-self: flex-start; margin-bottom: 12px; }
.news-feature-body h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-ink);
    line-height: 1.4;
    margin-bottom: 10px;
}
.news-feature-body p {
    font-size: 14px;
    color: var(--color-ink-secondary);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 16px;
    flex: 1;
}
.news-feature-meta {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 13px;
    color: var(--color-ink-secondary);
}
.news-feature-meta i { color: var(--color-primary); }
.news-list {
    display: flex;
    flex-direction: column;
}
.news-list-item {
    display: block;
    padding: 18px 0;
    border-bottom: 1px solid var(--color-line);
    transition: background .2s ease;
    border-radius: 8px;
}
.news-list-item:first-child { padding-top: 0; }
.news-list-item:last-child { border-bottom: none; padding-bottom: 0; }
.news-list-cat {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary-strong);
    background: var(--color-primary-bg);
    border-radius: 999px;
    padding: 2px 10px;
    display: inline-block;
    margin-bottom: 6px;
}
.news-list-item h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.4;
    margin-bottom: 4px;
    transition: color .2s ease;
}
.news-list-item:hover h4 { color: var(--color-primary-strong); }
.news-list-item p {
    font-size: 14px;
    color: var(--color-ink-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 6px;
}
.news-list-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--color-ink-secondary);
}
.news-list-meta .news-date { display: inline-flex; align-items: center; gap: 5px; }
.news-list-meta .news-date i { color: var(--color-primary); font-size: 12px; }

/* 空状态 */
.empty-state {
    grid-column: 1 / -1;
    border: 2px dashed var(--color-line);
    border-radius: var(--radius-card);
    background: var(--color-primary-bg);
    padding: 48px 24px;
    text-align: center;
    font-size: 15px;
    color: var(--color-ink-secondary);
}

/* ========== 页脚 ========== */
.site-footer {
    background: var(--color-ink);
    color: rgba(255, 255, 255, 0.7);
    padding: 64px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 1fr 1.1fr;
    gap: 48px;
    padding-bottom: 48px;
}
.footer-brand .brand-text {
    color: #fff;
    font-size: 18px;
    font-weight: 700;
}
.footer-brand .brand-icon {
    width: 38px;
    height: 38px;
    font-size: 15px;
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    margin-top: 16px;
    color: rgba(255, 255, 255, 0.6);
}
.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 18px;
}
.footer-col ul {
    list-style: none;
    display: grid;
    gap: 10px;
}
.footer-col ul a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    transition: all .2s ease;
}
.footer-col ul a:hover { color: var(--color-primary); padding-left: 4px; }
.footer-contact {
    display: grid;
    gap: 10px;
}
.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}
.footer-contact li i { color: var(--color-primary); 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, 0.5);
}

/* ========== 响应式 ========== */
@media screen and (max-width: 1024px) {
    .main-nav { display: none; }
    .nav-toggle { display: flex; }
    .mobile-menu { display: block; }
    .nav-search { display: none; }
    .hero { padding-top: 80px; }
    .hero h1 { font-size: 34px; }
    .content-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .tiers-grid { grid-template-columns: 1fr; gap: 20px; }
    .tier-card.featured { transform: none; }
    .tier-card.featured:hover { transform: translateY(-2px); }
    .faq-grid { grid-template-columns: 1fr; gap: 32px; }
    .news-wrap { grid-template-columns: 1fr; }
}
@media screen and (max-width: 768px) {
    :root { --space-section: 56px; }
    .hero { padding-top: 72px; }
    .hero h1 { font-size: 30px; }
    .hero-copy { padding-right: 0; }
    .hero-visual { min-height: 320px; margin-top: 32px; }
    .trust-inner { flex-wrap: wrap; gap: 24px; }
    .trust-item { flex: 1 1 45%; }
    .trust-item + .trust-item::before { display: none; }
    .compare-wrap { grid-template-columns: 1fr; }
    .compare-col.member { border-radius: 0 0 var(--radius-card) var(--radius-card); }
    .content-grid { grid-template-columns: 1fr; }
    .section-head h2 { font-size: 26px; }
    .cta-inner { flex-direction: column; text-align: center; justify-content: center; }
    .cta-actions { justify-content: center; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}
@media screen and (max-width: 520px) {
    .container { padding: 0 16px; }
    .hero h1 { font-size: 26px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }
    .trust-item { flex: 1 1 100%; }
    .trust-item + .trust-item { margin-top: 0; }
    .tier-card { padding: 24px 20px; }
    .faq-item summary { padding: 16px 18px; font-size: 14px; }
    .faq-answer { padding: 0 18px 16px; }
    .btn { height: 44px; padding: 0 24px; }
    .cta-text h2 { font-size: 22px; }
    .cta-actions { flex-direction: column; width: 100%; }
    .cta-actions .btn { width: 100%; }
    .news-feature-body { padding: 18px; }
}

/* ========== 可访问性 ========== */
a:focus-visible {
    outline: 3px solid rgba(59, 158, 255, 0.3);
    outline-offset: 2px;
    border-radius: 4px;
}

/* roulang page: article */
:root {
            --color-primary: #3B9EFF;
            --color-primary-strong: #1F7EDB;
            --color-primary-bg: #EFF6FF;
            --color-secondary: #2E5E9E;
            --color-accent: #F59E0B;
            --color-ink: #1E293B;
            --color-ink-secondary: #64748B;
            --color-line: #E5EAF0;
            --color-surface: #FFFFFF;
            --color-surface-soft: #F8FAFC;
            --shadow-card: 0 4px 20px rgba(30, 64, 120, 0.06);
            --shadow-card-hover: 0 10px 28px rgba(30, 64, 120, 0.12);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-input: 10px;
            --max-width: 1200px;
            --gutter: 24px;
            --space-section: 96px;
            --space-section-mobile: 56px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-ink);
            background: var(--color-surface);
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color .2s ease;
        }

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

        a:focus-visible {
            outline: 3px solid rgba(59, 158, 255, 0.25);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 44px;
            border: none;
            cursor: pointer;
            transition: all .2s ease;
            text-align: center;
        }

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

        .btn-primary:hover {
            background: var(--color-primary-strong);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(59, 158, 255, 0.25);
        }

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

        .btn-primary:focus-visible {
            outline: 3px solid rgba(59, 158, 255, 0.25);
            outline-offset: 2px;
        }

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

        .btn-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary-strong);
            transform: translateY(-1px);
        }

        .btn-white {
            background: #fff;
            color: var(--color-secondary);
        }

        .btn-white:hover {
            background: var(--color-primary-bg);
            color: var(--color-secondary);
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
        }

        .btn-sm {
            height: 40px;
            line-height: 40px;
            padding: 0 20px;
            font-size: 14px;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            line-height: 1.4;
            background: var(--color-primary-bg);
            color: var(--color-primary);
        }

        .badge-hot {
            background: var(--color-accent);
            color: #fff;
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-ink);
            margin: 0 0 8px;
        }

        .section-subtitle {
            font-size: 14px;
            color: var(--color-ink-secondary);
            margin-bottom: 32px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 64px;
            background: transparent;
            border-bottom: 1px solid transparent;
            transition: all .3s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            -webkit-backdrop-filter: blur(12px);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-line);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 16px;
        }

        .header-left {
            display: flex;
            align-items: center;
            gap: 32px;
            min-width: 0;
        }

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

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--color-primary);
            color: #fff;
            font-size: 12px;
            font-weight: 800;
            letter-spacing: 0.5px;
        }

        .brand-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-ink);
            letter-spacing: 0.2px;
            white-space: nowrap;
        }

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

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

        .nav-link {
            display: inline-flex;
            align-items: center;
            height: 36px;
            padding: 0 12px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-ink-secondary);
            white-space: nowrap;
            transition: all .2s ease;
        }

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

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

        .header-right {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-search {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: none;
            border-radius: var(--radius-btn);
            background: transparent;
            color: var(--color-ink-secondary);
            font-size: 15px;
            cursor: pointer;
            transition: all .2s ease;
        }

        .nav-search:hover {
            background: var(--color-primary-bg);
            color: var(--color-primary);
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border: none;
            background: transparent;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            flex-direction: column;
            justify-content: center;
            gap: 4px;
            transition: background .2s ease;
        }

        .nav-toggle span {
            display: block;
            height: 2px;
            width: 22px;
            background: var(--color-ink);
            border-radius: 2px;
            transition: all .3s ease;
            margin: 0 auto;
        }

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

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(6px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-6px) rotate(-45deg);
        }

        .article-header-section {
            padding: 128px 0 48px;
            background: var(--color-surface-soft);
            border-bottom: 1px solid var(--color-line);
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--color-ink-secondary);
            margin-bottom: 24px;
        }

        .article-breadcrumb a {
            color: var(--color-ink-secondary);
            transition: color .2s ease;
        }

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

        .article-breadcrumb i {
            font-size: 10px;
            color: #B0B8C4;
        }

        .article-breadcrumb .current {
            color: var(--color-ink);
            font-weight: 500;
            max-width: 260px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .article-heading {
            max-width: 860px;
            margin: 0 auto;
            text-align: center;
        }

        .article-heading .category-badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: 999px;
            background: var(--color-primary-bg);
            color: var(--color-primary);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .article-heading h1 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--color-ink);
            margin: 0 0 18px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--color-ink-secondary);
            margin-bottom: 20px;
        }

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

        .article-meta .meta-item i {
            font-size: 13px;
            color: #B0B8C4;
        }

        .article-summary {
            max-width: 720px;
            margin: 0 auto;
            font-size: 15px;
            color: var(--color-ink-secondary);
            line-height: 1.8;
            background: rgba(255, 255, 255, 0.7);
            border-radius: var(--radius-card);
            padding: 16px 24px;
            border: 1px solid var(--color-line);
        }

        .article-content-section {
            padding: 56px 0 var(--space-section);
            background: var(--color-surface);
        }

        .article-content-wrap {
            max-width: 720px;
            margin: 0 auto;
        }

        .article-content {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-ink);
        }

        .article-content p {
            margin: 0 0 24px;
        }

        .article-content h2 {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.3;
            margin: 40px 0 16px;
            padding-top: 8px;
            border-bottom: 1px solid var(--color-line);
            padding-bottom: 12px;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            margin: 32px 0 12px;
        }

        .article-content img {
            border-radius: 12px;
            margin: 24px 0;
            box-shadow: var(--shadow-card);
        }

        .article-content blockquote {
            margin: 24px 0;
            padding: 16px 24px;
            background: var(--color-primary-bg);
            border-left: 4px solid var(--color-primary);
            border-radius: 0 12px 12px 0;
            color: var(--color-ink);
            font-style: normal;
        }

        .article-content ul,
        .article-content ol {
            margin: 16px 0 24px;
            padding-left: 24px;
        }

        .article-content ul li {
            margin-bottom: 8px;
            padding-left: 4px;
            list-style: none;
            position: relative;
        }

        .article-content ul li::before {
            content: '';
            position: absolute;
            left: -18px;
            top: 10px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--color-primary);
        }

        .article-content ol li {
            margin-bottom: 8px;
            padding-left: 4px;
        }

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

        .article-content table th {
            background: var(--color-primary-bg);
            font-weight: 600;
            padding: 12px 16px;
            text-align: left;
            border-bottom: 2px solid var(--color-primary);
        }

        .article-content table td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--color-line);
        }

        .article-content a {
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-empty {
            text-align: center;
            padding: 80px 24px;
            background: var(--color-surface-soft);
            border-radius: var(--radius-card);
            border: 1px dashed var(--color-line);
        }

        .article-empty i {
            font-size: 42px;
            color: #B0B8C4;
            margin-bottom: 16px;
        }

        .article-empty p {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-ink);
            margin-bottom: 20px;
        }

        .article-bottom-nav {
            max-width: 720px;
            margin: 0 auto;
            padding: 24px 0 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            border-top: 1px solid var(--color-line);
        }

        .back-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-ink-secondary);
            transition: all .2s ease;
        }

        .back-link:hover {
            color: var(--color-primary);
            gap: 10px;
        }

        .related-section {
            padding: var(--space-section) 0;
            background: var(--color-surface-soft);
        }

        .related-section .section-head {
            text-align: center;
            margin-bottom: 40px;
        }

        .related-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin: 0 -12px;
        }

        .related-grid .cell {
            padding: 0 12px;
            flex: 1 1 auto;
            max-width: calc(33.333% - 24px);
        }

        .related-card {
            background: var(--color-surface);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all .2s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .related-card-media {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            position: relative;
            background: var(--color-primary-bg);
        }

        .related-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .3s ease;
        }

        .related-card:hover .related-card-media img {
            transform: scale(1.02);
        }

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

        .related-card-body h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.45;
            margin: 0 0 10px;
        }

        .related-card-body h3 a {
            color: var(--color-ink);
            transition: color .2s ease;
        }

        .related-card-body h3 a:hover {
            color: var(--color-primary);
        }

        .related-card-body p {
            font-size: 13px;
            color: var(--color-ink-secondary);
            line-height: 1.6;
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .related-card-body .related-date {
            font-size: 12px;
            color: #B0B8C4;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .cta-banner {
            background: var(--color-secondary);
            padding: 64px 0;
            position: relative;
            background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 32px 32px;
        }

        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-text h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin: 0 0 8px;
        }

        .cta-text p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
            margin: 0;
        }

        .site-footer {
            background: var(--color-ink);
            color: rgba(255, 255, 255, 0.7);
            padding-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            padding-bottom: 48px;
        }

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

        .footer-brand .brand-icon {
            background: var(--color-primary);
            color: #fff;
        }

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

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin: 0;
            color: rgba(255, 255, 255, 0.6);
        }

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

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

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

        .footer-col ul a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color .2s ease;
        }

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

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

        .footer-contact li i {
            width: 16px;
            color: var(--color-primary);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            font-size: 13px;
            text-align: center;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom .container {
            text-align: center;
        }

        @media (max-width: 1024px) {
            :root {
                --space-section: 72px;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background: rgba(255, 255, 255, 0.98);
                border-bottom: 1px solid var(--color-line);
                padding: 16px 24px 24px;
                gap: 4px;
                transform: translateY(-120%);
                transition: transform .3s ease;
                overflow-y: auto;
                max-height: calc(100vh - 64px);
                box-shadow: 0 16px 32px rgba(0, 0, 0, 0.08);
                z-index: 999;
                display: flex;
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .main-nav .nav-link {
                height: 44px;
                padding: 0 16px;
                font-size: 15px;
                border-radius: 10px;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-cta {
                display: none;
            }

            .header-left {
                gap: 16px;
                flex: 1;
            }

            .header-right {
                gap: 8px;
            }

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

        @media (max-width: 768px) {
            :root {
                --space-section: 56px;
                --gutter: 20px;
            }

            .article-header-section {
                padding: 108px 0 40px;
            }

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

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

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

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

            .related-grid .cell {
                max-width: 100%;
                flex: 1 1 100%;
            }

            .cta-inner {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }

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

        @media (max-width: 520px) {
            body {
                font-size: 14px;
            }

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

            .article-breadcrumb {
                font-size: 12px;
            }

            .article-bottom-nav {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .article-bottom-nav .next-link {
                width: 100%;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #3B9EFF;
            --color-primary-strong: #1F7EDB;
            --color-primary-bg: #EFF6FF;
            --color-secondary: #2E5E9E;
            --color-accent: #F59E0B;
            --color-ink: #1E293B;
            --color-ink-secondary: #64748B;
            --color-line: #E5EAF0;
            --color-surface: #FFFFFF;
            --color-surface-soft: #F8FAFC;
            --shadow-card: 0 4px 20px rgba(30, 64, 120, 0.06);
            --shadow-card-hover: 0 10px 28px rgba(30, 64, 120, 0.12);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-input: 10px;
            --max-width: 1200px;
            --gutter: 24px;
            --space-section: 96px;
            --space-section-mobile: 56px;
            --header-height: 64px;
            --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            font-size: 15px;
            line-height: 1.75;
            color: var(--color-ink);
            background: var(--color-surface);
            -webkit-font-smoothing: antialiased;
        }

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

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

        a:focus-visible {
            outline: 3px solid rgba(59, 158, 255, 0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        ul, ol {
            list-style: none;
        }

        button {
            border: none;
            background: none;
            cursor: pointer;
            font-family: inherit;
        }

        input, textarea, select {
            font-family: inherit;
            font-size: inherit;
        }

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

        h1, h2, h3, h4, h5, h6 {
            color: var(--color-ink);
            line-height: 1.3;
        }

        h1 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.02em;
        }

        h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
        }

        h3 {
            font-size: 20px;
            font-weight: 600;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 48px;
            padding: 0 32px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            transition: all 0.2s ease;
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn:hover {
            transform: translateY(-1px);
        }

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

        .btn:focus-visible {
            outline: 3px solid rgba(59, 158, 255, 0.25);
            outline-offset: 2px;
        }

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

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

        .btn-outline {
            background: var(--color-surface);
            border-color: var(--color-line);
            color: var(--color-primary);
        }

        .btn-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary-strong);
        }

        .btn-sm {
            height: 40px;
            padding: 0 20px;
            font-size: 14px;
        }

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

        .btn-light:hover {
            background: var(--color-primary-bg);
            color: var(--color-primary-strong);
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            z-index: 1000;
            background: transparent;
            transition: all 0.3s ease;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--color-line);
            box-shadow: 0 2px 16px rgba(30, 64, 120, 0.06);
        }

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

        .header-left {
            display: flex;
            align-items: center;
            gap: 36px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--color-primary);
            color: #fff;
            font-size: 14px;
            font-weight: 800;
            letter-spacing: 0.02em;
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-ink);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: inline-block;
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-ink-secondary);
            transition: all 0.2s ease;
        }

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

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

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

        .nav-search {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            color: var(--color-ink-secondary);
            font-size: 16px;
            transition: all 0.2s ease;
        }

        .nav-search:hover {
            background: var(--color-primary-bg);
            color: var(--color-primary);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            gap: 5px;
            transition: background 0.2s ease;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--color-ink);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .cat-hero {
            position: relative;
            padding: calc(var(--header-height) + 64px) 0 56px;
            background: linear-gradient(120deg, var(--color-primary-bg) 0%, var(--color-surface) 100%);
            overflow: hidden;
        }

        .cat-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
            pointer-events: none;
        }

        .cat-hero .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--color-ink-secondary);
            margin-bottom: 20px;
        }

        .breadcrumb a {
            color: var(--color-ink-secondary);
            transition: color 0.2s;
        }

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

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

        .breadcrumb .current {
            color: var(--color-primary);
            font-weight: 600;
        }

        .cat-hero h1 {
            font-size: 38px;
            line-height: 1.25;
            margin-bottom: 20px;
            max-width: 760px;
        }

        .cat-lead {
            font-size: 16px;
            color: var(--color-ink-secondary);
            line-height: 1.8;
            max-width: 680px;
        }

        .cat-body {
            padding: 64px 0 var(--space-section);
            background: var(--color-surface-soft);
        }

        .cat-layout {
            display: flex;
            gap: 32px;
            align-items: flex-start;
        }

        .cat-main {
            flex: 1;
            min-width: 0;
        }

        .cat-sidebar {
            flex: 0 0 320px;
            max-width: 320px;
            position: sticky;
            top: 84px;
        }

        .info-card {
            background: var(--color-surface);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 36px;
            margin-bottom: 28px;
            border: 1px solid var(--color-line);
            transition: box-shadow 0.2s ease;
        }

        .info-card:hover {
            box-shadow: var(--shadow-card-hover);
        }

        .info-card h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 16px;
            border-bottom: 2px solid var(--color-primary-bg);
            position: relative;
        }

        .info-card h2::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 48px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .info-card h2 .section-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: var(--color-primary-bg);
            color: var(--color-primary);
            font-size: 14px;
            font-weight: 700;
            margin-right: 10px;
            vertical-align: middle;
        }

        .info-card p {
            color: var(--color-ink);
            font-size: 15px;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .info-card p:last-child {
            margin-bottom: 0;
        }

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

        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--color-ink);
            line-height: 1.7;
            padding: 14px 18px;
            background: var(--color-surface-soft);
            border-radius: 12px;
            border: 1px solid var(--color-line);
        }

        .check-list li::before {
            content: '✓';
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            margin-top: 1px;
        }

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

        .steps-list li {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 18px 20px;
            background: var(--color-surface-soft);
            border-radius: 12px;
            border: 1px solid var(--color-line);
        }

        .step-num {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 10px;
            background: var(--color-primary-bg);
            color: var(--color-primary);
            font-weight: 700;
            font-size: 15px;
        }

        .steps-list li p {
            margin-bottom: 0;
            font-size: 14.5px;
            color: var(--color-ink-secondary);
            line-height: 1.75;
        }

        .device-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 8px;
        }

        .device-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 10px;
            padding: 24px 16px;
            background: var(--color-surface-soft);
            border-radius: 14px;
            border: 1px solid var(--color-line);
            transition: all 0.2s ease;
        }

        .device-item:hover {
            border-color: var(--color-primary);
            box-shadow: var(--shadow-card);
        }

        .device-item i {
            font-size: 30px;
            color: var(--color-primary);
        }

        .device-item span {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-ink);
        }

        .device-item small {
            font-size: 13px;
            color: var(--color-ink-secondary);
            line-height: 1.6;
        }

        .faq-mini-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-mini-item {
            background: var(--color-surface-soft);
            border: 1px solid var(--color-line);
            border-radius: 14px;
            overflow: hidden;
            transition: border-color 0.2s ease;
        }

        .faq-mini-item:hover {
            border-color: var(--color-primary);
        }

        .faq-mini-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-ink);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            border: none;
            transition: color 0.2s ease;
        }

        .faq-mini-question i {
            font-size: 14px;
            color: var(--color-ink-secondary);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .faq-mini-item.open .faq-mini-question i {
            transform: rotate(180deg);
            color: var(--color-primary);
        }

        .faq-mini-answer {
            display: none;
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--color-ink-secondary);
            line-height: 1.75;
        }

        .faq-mini-item.open .faq-mini-answer {
            display: block;
        }

        .recommend-block {
            margin-top: 40px;
            padding-top: 36px;
            border-top: 1px solid var(--color-line);
        }

        .recommend-block h2 {
            font-size: 22px;
            margin-bottom: 24px;
        }

        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .rec-card {
            background: var(--color-surface);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-line);
            overflow: hidden;
            transition: all 0.2s ease;
            display: flex;
            flex-direction: column;
        }

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

        .rec-card .rec-img {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--color-primary-bg);
            position: relative;
        }

        .rec-card .rec-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

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

        .rec-card .rec-img .img-fallback {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 100%;
            height: 100%;
            color: var(--color-ink-secondary);
            font-size: 14px;
        }

        .rec-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

        .rec-body h3 {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.4;
        }

        .rec-body h3 a {
            color: var(--color-ink);
            transition: color 0.2s;
        }

        .rec-body h3 a:hover {
            color: var(--color-primary);
        }

        .rec-body p {
            font-size: 14px;
            color: var(--color-ink-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }

        .rec-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            margin-top: 4px;
            transition: gap 0.2s ease;
        }

        .rec-link:hover {
            gap: 10px;
            color: var(--color-primary-strong);
        }

        .side-card {
            background: var(--color-surface);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-line);
            padding: 24px;
            margin-bottom: 20px;
        }

        .side-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--color-primary-bg);
            position: relative;
        }

        .side-card h3::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
        }

        .side-nav-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .side-nav-list a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 12px;
            border-radius: 8px;
            font-size: 14.5px;
            color: var(--color-ink-secondary);
            transition: all 0.2s ease;
        }

        .side-nav-list a i {
            font-size: 12px;
            color: var(--color-line);
            transition: color 0.2s ease;
        }

        .side-nav-list a:hover {
            background: var(--color-primary-bg);
            color: var(--color-primary);
        }

        .side-nav-list a:hover i {
            color: var(--color-primary);
        }

        .side-nav-list a.active-anchor {
            background: var(--color-primary-bg);
            color: var(--color-primary);
            font-weight: 600;
        }

        .side-nav-list a.active-anchor i {
            color: var(--color-primary);
        }

        .side-nav-divider {
            height: 1px;
            background: var(--color-line);
            margin: 10px 0;
        }

        .side-nav-list a.side-nav-external {
            color: var(--color-primary);
            font-weight: 600;
        }

        .side-card-dark {
            background: var(--color-secondary);
            border-color: var(--color-secondary);
        }

        .side-card-dark h3 {
            color: #fff;
            border-bottom-color: rgba(255, 255, 255, 0.15);
        }

        .side-card-dark h3::after {
            background: var(--color-primary);
        }

        .side-card-dark p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
            line-height: 1.75;
            margin-bottom: 18px;
        }

        .side-card-dark .btn {
            width: 100%;
        }

        .side-brand-card p {
            font-size: 14px;
            color: var(--color-ink-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .side-brand-card img {
            border-radius: 12px;
            margin-bottom: 4px;
        }

        .cta-band {
            background: var(--color-secondary);
            padding: 64px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                              linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
            background-size: 32px 32px;
            pointer-events: none;
        }

        .cta-band .container {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
        }

        .cta-band-text h2 {
            color: #fff;
            font-size: 28px;
            margin-bottom: 12px;
        }

        .cta-band-text p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
            line-height: 1.8;
            max-width: 560px;
        }

        .cta-band-action {
            flex-shrink: 0;
        }

        .site-footer {
            background: var(--color-ink);
            padding: 64px 0 0;
            color: rgba(255, 255, 255, 0.7);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 0.8fr 0.8fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
        }

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

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

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.75;
            max-width: 280px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }

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

        .footer-col li {
            font-size: 14px;
        }

        .footer-col a {
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.2s ease;
        }

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

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-contact i {
            color: var(--color-primary);
            width: 16px;
            text-align: center;
            font-size: 14px;
        }

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

        @media (max-width: 1023px) {
            :root {
                --space-section: 72px;
            }

            .main-nav {
                display: none;
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                flex-direction: column;
                align-items: stretch;
                padding: 20px var(--gutter);
                box-shadow: 0 16px 40px rgba(30, 64, 120, 0.12);
                gap: 2px;
                max-height: calc(100vh - var(--header-height));
                overflow-y: auto;
                z-index: 999;
                border-bottom: 1px solid var(--color-line);
            }

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

            .nav-link {
                display: block;
                padding: 14px 16px;
                border-radius: 10px;
                font-size: 16px;
            }

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

            .nav-toggle {
                display: inline-flex;
            }

            .nav-cta {
                display: none;
            }

            .cat-hero {
                padding: calc(var(--header-height) + 48px) 0 48px;
            }

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

            .cat-layout {
                flex-direction: column;
            }

            .cat-sidebar {
                flex: 1;
                max-width: 100%;
                position: static;
                margin-top: 12px;
            }

            .cat-body {
                padding: 48px 0 var(--space-section-mobile);
            }

            .cta-band .container {
                flex-direction: column;
                text-align: center;
            }

            .cta-band-text p {
                margin: 0 auto;
            }

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

        @media (max-width: 767px) {
            h1 {
                font-size: 30px;
            }

            h2 {
                font-size: 24px;
            }

            .cat-hero h1 {
                font-size: 26px;
            }

            .cat-lead {
                font-size: 15px;
            }

            .info-card {
                padding: 24px;
            }

            .info-card h2 {
                font-size: 20px;
            }

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

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

            .rec-card .rec-img {
                aspect-ratio: 16 / 9;
            }

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

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

            .cta-band {
                padding: 48px 0;
            }

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

            .side-card {
                padding: 20px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .header-inner {
                gap: 12px;
            }

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

            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 13px;
            }

            .nav-search {
                width: 36px;
                height: 36px;
            }

            .cat-hero h1 {
                font-size: 22px;
            }

            .info-card {
                padding: 20px;
            }

            .steps-list li {
                flex-direction: column;
                gap: 8px;
            }

            .check-list li {
                font-size: 14px;
                padding: 12px 14px;
            }
        }

/* roulang page: category2 */
:root {
        --color-primary: #3B9EFF;
        --color-primary-strong: #1F7EDB;
        --color-primary-bg: #EFF6FF;
        --color-secondary: #2E5E9E;
        --color-accent: #F59E0B;
        --color-ink: #1E293B;
        --color-ink-secondary: #64748B;
        --color-line: #E5EAF0;
        --color-surface: #FFFFFF;
        --color-surface-soft: #F8FAFC;
        --shadow-card: 0 4px 20px rgba(30, 64, 120, 0.06);
        --shadow-card-hover: 0 10px 28px rgba(30, 64, 120, 0.12);
        --radius-card: 16px;
        --radius-btn: 10px;
        --radius-input: 10px;
        --max-width: 1200px;
        --gutter: 24px;
        --space-section: 96px;
        --space-section-mobile: 56px;
    }
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
        font-size: 15px;
        line-height: 1.75;
        color: var(--color-ink);
        background: var(--color-surface);
        -webkit-font-smoothing: antialiased;
    }
    img {
        max-width: 100%;
        display: block;
        height: auto;
    }
    a {
        color: var(--color-primary);
        text-decoration: none;
        transition: color .2s ease;
    }
    a:hover {
        color: var(--color-primary-strong);
    }
    a:focus-visible,
    button:focus-visible {
        outline: 3px solid rgba(59, 158, 255, 0.25);
        outline-offset: 2px;
    }
    ul,
    ol {
        list-style: none;
    }
    button {
        cursor: pointer;
        font-family: inherit;
        border: none;
        background: none;
    }
    .container {
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 var(--gutter);
    }
    .row {
        max-width: var(--max-width);
        margin: 0 auto;
    }
    .row .row {
        margin-left: -0.625rem;
        margin-right: -0.625rem;
    }

    /* ===== Header ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        height: 64px;
        background: transparent;
        transition: background .3s ease, box-shadow .3s ease, border-color .3s ease;
        border-bottom: 1px solid transparent;
    }
    .site-header.scrolled {
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--color-line);
        box-shadow: 0 2px 16px rgba(30, 64, 120, 0.06);
    }
    .header-inner {
        height: 64px;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    .header-left {
        display: flex;
        align-items: center;
        gap: 32px;
    }
    .brand {
        display: inline-flex;
        align-items: center;
        gap: 10px;
    }
    .brand-icon {
        width: 36px;
        height: 36px;
        border-radius: 9px;
        background: linear-gradient(135deg, var(--color-primary), var(--color-primary-strong));
        color: #fff;
        font-size: 14px;
        font-weight: 800;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        letter-spacing: 0;
        flex-shrink: 0;
    }
    .brand-text {
        font-size: 16px;
        font-weight: 700;
        color: var(--color-ink);
        letter-spacing: 0.2px;
        white-space: nowrap;
    }
    .main-nav {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .nav-link {
        display: inline-block;
        padding: 8px 15px;
        font-size: 15px;
        font-weight: 500;
        color: var(--color-ink);
        border-radius: 8px;
        line-height: 1.4;
        transition: background .2s ease, color .2s ease;
    }
    .nav-link:hover {
        color: var(--color-primary);
        background: var(--color-primary-bg);
    }
    .nav-link.active {
        background: var(--color-primary-bg);
        color: var(--color-primary-strong);
        font-weight: 600;
    }
    .header-right {
        display: flex;
        align-items: center;
        gap: 14px;
    }
    .nav-search {
        width: 40px;
        height: 40px;
        border-radius: 10px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        color: var(--color-ink);
        font-size: 16px;
        transition: background .2s, color .2s;
    }
    .nav-search:hover {
        background: var(--color-primary-bg);
        color: var(--color-primary);
    }
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-weight: 600;
        border-radius: var(--radius-btn);
        transition: all .2s ease;
        text-decoration: none;
        line-height: 1.2;
        border: 1px solid transparent;
    }
    .btn-sm {
        height: 40px;
        padding: 0 22px;
        font-size: 15px;
    }
    .btn-primary {
        background: var(--color-primary);
        color: #fff;
        border-color: var(--color-primary);
    }
    .btn-primary:hover {
        background: var(--color-primary-strong);
        border-color: var(--color-primary-strong);
        color: #fff;
        transform: translateY(-1px);
        box-shadow: 0 6px 18px rgba(59, 158, 255, 0.3);
    }
    .btn-primary:active {
        transform: translateY(0);
        box-shadow: none;
    }
    .btn-outline {
        background: #fff;
        color: var(--color-primary);
        border-color: var(--color-line);
    }
    .btn-outline:hover {
        border-color: var(--color-primary);
        color: var(--color-primary-strong);
        background: var(--color-primary-bg);
    }
    .btn-white {
        background: #fff;
        color: var(--color-secondary);
        border-color: #fff;
    }
    .btn-white:hover {
        background: var(--color-primary-bg);
        color: var(--color-primary-strong);
        transform: translateY(-1px);
        box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
    }
    .nav-cta {
        color: #fff;
    }
    .nav-toggle {
        display: none;
        width: 40px;
        height: 40px;
        border-radius: 10px;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 5px;
        transition: background .2s;
    }
    .nav-toggle span {
        width: 20px;
        height: 2px;
        background: var(--color-ink);
        border-radius: 2px;
        transition: transform .3s ease, opacity .3s ease, background .3s;
    }
    .nav-toggle:hover {
        background: var(--color-primary-bg);
    }

    /* ===== Page Hero ===== */
    .page-hero {
        background: linear-gradient(120deg, #EFF6FF 0%, #F8FAFC 60%, #FFFFFF 100%);
        padding: 160px 0 72px;
        position: relative;
        overflow: hidden;
    }
    .page-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background-image: linear-gradient(rgba(59, 158, 255, 0.05) 1px, transparent 1px),
            linear-gradient(90deg, rgba(59, 158, 255, 0.05) 1px, transparent 1px);
        background-size: 44px 44px;
        opacity: 0.5;
        pointer-events: none;
    }
    .page-hero .container {
        position: relative;
        z-index: 2;
    }
    .breadcrumb {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        color: var(--color-ink-secondary);
        margin-bottom: 28px;
        flex-wrap: wrap;
    }
    .breadcrumb a {
        color: var(--color-ink-secondary);
    }
    .breadcrumb a:hover {
        color: var(--color-primary);
    }
    .breadcrumb i {
        font-size: 12px;
        color: #98A2B3;
    }
    .breadcrumb .current {
        color: var(--color-ink);
        font-weight: 500;
    }
    .page-hero h1 {
        font-size: 38px;
        font-weight: 800;
        line-height: 1.3;
        color: var(--color-ink);
        max-width: 860px;
        margin-bottom: 20px;
    }
    .page-hero .page-desc {
        font-size: 16px;
        color: var(--color-ink-secondary);
        max-width: 720px;
        line-height: 1.8;
    }
    .hero-badges {
        display: flex;
        gap: 12px;
        margin-top: 28px;
        flex-wrap: wrap;
    }
    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(255, 255, 255, 0.8);
        border: 1px solid var(--color-line);
        border-radius: 999px;
        padding: 8px 18px;
        font-size: 14px;
        font-weight: 500;
        color: var(--color-ink);
        box-shadow: 0 2px 8px rgba(30, 64, 120, 0.04);
    }
    .hero-badge i {
        color: var(--color-primary);
        font-size: 13px;
    }

    /* ===== Category Main ===== */
    .category-main {
        padding: 72px 0 var(--space-section);
        background: var(--color-surface-soft);
    }
    .category-content {
        padding-bottom: 40px;
    }
    .info-card {
        background: var(--color-surface);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 40px;
        margin-bottom: 28px;
        border: 1px solid rgba(229, 234, 240, 0.5);
        transition: box-shadow .25s ease;
    }
    .info-card:hover {
        box-shadow: var(--shadow-card-hover);
    }
    .info-card-header {
        margin-bottom: 24px;
    }
    .section-tag {
        display: inline-block;
        background: var(--color-primary-bg);
        color: var(--color-primary-strong);
        font-size: 13px;
        font-weight: 600;
        border-radius: 999px;
        padding: 4px 14px;
        margin-bottom: 14px;
        letter-spacing: 0.3px;
    }
    .info-card h2 {
        font-size: 28px;
        font-weight: 700;
        line-height: 1.3;
        color: var(--color-ink);
        margin-bottom: 8px;
    }
    .info-card .card-desc {
        font-size: 15px;
        color: var(--color-ink-secondary);
        line-height: 1.8;
        margin-bottom: 24px;
    }
    .info-card p {
        margin-bottom: 16px;
        font-size: 15px;
        color: var(--color-ink);
        line-height: 1.8;
    }
    .compare-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
        margin-top: 20px;
    }
    .compare-col {
        background: var(--color-surface-soft);
        border-radius: 14px;
        padding: 26px 26px 30px;
        border: 1px solid var(--color-line);
    }
    .compare-col.compare-vip {
        background: var(--color-primary-bg);
        border: 2px solid var(--color-primary);
        position: relative;
    }
    .compare-col h3 {
        font-size: 18px;
        font-weight: 700;
        color: var(--color-ink);
        margin-bottom: 4px;
    }
    .compare-col .price-text {
        font-size: 22px;
        font-weight: 800;
        color: var(--color-primary-strong);
        margin-bottom: 16px;
    }
    .compare-col.compare-free .price-text {
        color: var(--color-ink-secondary);
        font-weight: 700;
        font-size: 18px;
    }
    .compare-col ul {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }
    .compare-col ul li {
        display: flex;
        align-items: flex-start;
        gap: 10px;
        font-size: 14px;
        color: var(--color-ink);
        line-height: 1.6;
    }
    .compare-col ul li i {
        color: var(--color-primary);
        font-size: 14px;
        margin-top: 4px;
        flex-shrink: 0;
    }
    .compare-vip .vip-badge {
        position: absolute;
        top: -12px;
        right: 20px;
        background: var(--color-accent);
        color: #fff;
        font-size: 12px;
        font-weight: 700;
        border-radius: 999px;
        padding: 4px 14px;
        letter-spacing: 0.5px;
        box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
    }

    /* Tier list */
    .tier-list {
        display: flex;
        flex-direction: column;
        gap: 16px;
        margin-top: 8px;
    }
    .tier-item {
        background: var(--color-surface-soft);
        border-radius: 14px;
        padding: 24px 28px;
        border-left: 4px solid var(--color-primary);
        transition: box-shadow .2s, background .2s;
    }
    .tier-item:hover {
        background: var(--color-primary-bg);
        box-shadow: var(--shadow-card);
    }
    .tier-item h3 {
        font-size: 17px;
        font-weight: 700;
        color: var(--color-ink);
        margin-bottom: 4px;
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .tier-item .tier-icon {
        width: 28px;
        height: 28px;
        border-radius: 8px;
        background: var(--color-primary);
        color: #fff;
        font-size: 12px;
        font-weight: 700;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
    }
    .tier-item .tier-condition {
        font-size: 13px;
        color: var(--color-ink-secondary);
        margin-bottom: 10px;
    }
    .tier-item .tier-desc {
        font-size: 14px;
        color: var(--color-ink);
        line-height: 1.7;
    }

    /* Steps */
    .steps-list {
        counter-reset: step;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
        margin-top: 8px;
    }
    .steps-list li {
        counter-increment: step;
        background: var(--color-surface-soft);
        border-radius: 14px;
        padding: 22px 24px;
        position: relative;
        padding-left: 64px;
        min-height: 100px;
    }
    .steps-list li::before {
        content: counter(step, decimal-leading-zero);
        position: absolute;
        left: 20px;
        top: 20px;
        width: 32px;
        height: 32px;
        border-radius: 9px;
        background: var(--color-primary-bg);
        color: var(--color-primary-strong);
        font-size: 14px;
        font-weight: 800;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .steps-list li h4 {
        font-size: 15px;
        font-weight: 700;
        color: var(--color-ink);
        margin-bottom: 4px;
    }
    .steps-list li p {
        font-size: 14px;
        color: var(--color-ink-secondary);
        line-height: 1.6;
        margin-bottom: 0;
    }
    .notice-box {
        background: var(--color-primary-bg);
        border-radius: 14px;
        padding: 18px 22px;
        margin-top: 20px;
        border-left: 4px solid var(--color-primary);
    }
    .notice-box p {
        font-size: 14px;
        color: var(--color-ink);
        margin-bottom: 0;
        line-height: 1.7;
    }
    .notice-box i {
        color: var(--color-primary);
        margin-right: 8px;
    }

    /* FAQ Accordion */
    .accordion {
        display: flex;
        flex-direction: column;
        gap: 12px;
        margin-top: 8px;
    }
    .accordion-item {
        background: var(--color-surface-soft);
        border-radius: 14px;
        border: 1px solid transparent;
        overflow: hidden;
        transition: border-color .25s ease, background .25s ease;
    }
    .accordion-item.open {
        border-color: var(--color-primary);
        background: var(--color-surface);
    }
    .accordion-btn {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 18px 24px;
        font-size: 15px;
        font-weight: 600;
        color: var(--color-ink);
        text-align: left;
        background: transparent;
        transition: color .2s;
    }
    .accordion-btn:hover {
        color: var(--color-primary);
    }
    .accordion-btn i {
        font-size: 14px;
        color: var(--color-ink-secondary);
        transition: transform .3s ease;
        flex-shrink: 0;
    }
    .accordion-item.open .accordion-btn i {
        transform: rotate(180deg);
        color: var(--color-primary);
    }
    .accordion-content {
        max-height: 0;
        overflow: hidden;
        transition: max-height .35s ease;
    }
    .accordion-content-inner {
        padding: 0 24px 20px;
        font-size: 14px;
        color: var(--color-ink-secondary);
        line-height: 1.75;
        border-top: 1px solid var(--color-line);
        margin: 0 24px;
        padding: 16px 0 20px;
    }
    .accordion-content-inner p {
        font-size: 14px;
        line-height: 1.75;
        color: var(--color-ink);
    }

    /* Recommend */
    .recommend-block {
        margin-top: 40px;
        padding-top: 8px;
    }
    .recommend-block h2 {
        font-size: 24px;
        font-weight: 700;
        color: var(--color-ink);
        margin-bottom: 20px;
        border-left: 4px solid var(--color-primary);
        padding-left: 16px;
    }
    .recommend-card {
        background: var(--color-surface);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        overflow: hidden;
        transition: transform .2s ease, box-shadow .2s ease;
        height: 100%;
        display: flex;
        flex-direction: column;
    }
    .recommend-card:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-card-hover);
    }
    .recommend-card .rc-img {
        aspect-ratio: 16 / 9;
        overflow: hidden;
        background: var(--color-primary-bg);
        position: relative;
    }
    .recommend-card .rc-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .4s ease;
    }
    .recommend-card:hover .rc-img img {
        transform: scale(1.03);
    }
    .recommend-card .rc-body {
        padding: 20px 22px 22px;
        display: flex;
        flex-direction: column;
        gap: 8px;
        flex: 1;
    }
    .recommend-card .rc-body h3 {
        font-size: 16px;
        font-weight: 700;
        color: var(--color-ink);
        line-height: 1.4;
        transition: color .2s;
    }
    .recommend-card .rc-body p {
        font-size: 14px;
        color: var(--color-ink-secondary);
        line-height: 1.6;
        margin-bottom: 10px;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        flex: 1;
    }
    .recommend-card .rc-link {
        font-size: 14px;
        font-weight: 600;
        color: var(--color-primary);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }
    .recommend-card .rc-link i {
        transition: transform .2s;
    }
    .recommend-card .rc-link:hover i {
        transform: translateX(4px);
    }

    /* Sidebar */
    .category-sidebar .columns {
        padding-left: 16px;
        padding-right: 16px;
    }
    .sidebar-inner {
        position: sticky;
        top: 84px;
        display: flex;
        flex-direction: column;
        gap: 24px;
    }
    .side-card {
        background: var(--color-surface);
        border-radius: var(--radius-card);
        box-shadow: var(--shadow-card);
        padding: 28px;
        border: 1px solid rgba(229, 234, 240, 0.5);
    }
    .side-card h3 {
        font-size: 17px;
        font-weight: 700;
        color: var(--color-ink);
        margin-bottom: 14px;
        padding-bottom: 12px;
        border-bottom: 1px solid var(--color-line);
    }
    .side-nav {
        display: flex;
        flex-direction: column;
        gap: 2px;
    }
    .side-nav a {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 9px 12px;
        font-size: 14px;
        color: var(--color-ink);
        border-radius: 8px;
        transition: background .2s, color .2s;
    }
    .side-nav a i {
        font-size: 12px;
        color: #98A2B3;
        width: 16px;
        text-align: center;
        transition: color .2s;
    }
    .side-nav a:hover {
        background: var(--color-primary-bg);
        color: var(--color-primary-strong);
    }
    .side-nav a.active {
        background: var(--color-primary-bg);
        color: var(--color-primary-strong);
        font-weight: 600;
    }
    .side-nav a.active i {
        color: var(--color-primary);
    }
    .side-nav-divider {
        border-top: 1px solid var(--color-line);
        margin: 10px 0;
        padding-top: 10px;
    }
    .side-nav-secondary {
        font-size: 13px;
        color: var(--color-ink-secondary);
        padding: 4px 12px 10px;
        font-weight: 600;
        letter-spacing: 0.5px;
    }
    .side-card-cta {
        background: var(--color-secondary);
        border: none;
        position: relative;
        overflow: hidden;
    }
    .side-card-cta::before {
        content: '';
        position: absolute;
        inset: 0;
        background-image: linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
            linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
        background-size: 22px 22px;
        opacity: 0.4;
        pointer-events: none;
    }
    .side-card-cta h3 {
        color: #fff;
        border-bottom-color: rgba(255, 255, 255, 0.18);
    }
    .side-card-cta p {
        font-size: 14px;
        color: rgba(255, 255, 255, 0.75);
        line-height: 1.7;
        margin-bottom: 18px;
        position: relative;
        z-index: 2;
    }
    .side-card-cta .btn-white {
        width: 100%;
        height: 44px;
        position: relative;
        z-index: 2;
    }
    .side-brand-card p {
        font-size: 14px;
        color: var(--color-ink-secondary);
        line-height: 1.75;
        margin-top: 10px;
    }
    .side-brand-card .brand-sm {
        display: flex;
        align-items: center;
        gap: 8px;
        margin-bottom: 10px;
    }
    .side-brand-card .brand-icon {
        width: 32px;
        height: 32px;
        font-size: 12px;
        border-radius: 8px;
    }
    .side-brand-card .brand-sm-text {
        font-size: 15px;
        font-weight: 700;
        color: var(--color-ink);
    }

    /* CTA Banner */
    .cta-banner {
        background: var(--color-secondary);
        padding: 64px 0;
        position: relative;
        overflow: hidden;
    }
    .cta-banner::before {
        content: '';
        position: absolute;
        inset: 0;
        background-image: linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
            linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
        background-size: 28px 28px;
        pointer-events: none;
    }
    .cta-inner {
        position: relative;
        z-index: 2;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 40px;
        flex-wrap: wrap;
    }
    .cta-text h2 {
        font-size: 28px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 8px;
        line-height: 1.3;
    }
    .cta-text p {
        font-size: 15px;
        color: rgba(255, 255, 255, 0.7);
        line-height: 1.7;
        max-width: 480px;
    }
    .cta-banner .btn-white {
        height: 48px;
        padding: 0 36px;
        font-size: 16px;
        flex-shrink: 0;
    }

    /* Footer */
    .site-footer {
        background: var(--color-ink);
        color: rgba(255, 255, 255, 0.7);
        padding: 64px 0 0;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1.2fr;
        gap: 48px;
        padding-bottom: 48px;
    }
    .footer-brand .brand {
        margin-bottom: 16px;
    }
    .footer-brand .brand-text {
        color: #fff;
    }
    .footer-brand p {
        font-size: 14px;
        line-height: 1.8;
        max-width: 320px;
    }
    .footer-col h4 {
        font-size: 15px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 18px;
        letter-spacing: 0.5px;
    }
    .footer-col ul {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    .footer-col ul a {
        color: rgba(255, 255, 255, 0.7);
        font-size: 14px;
        transition: color .2s, padding-left .2s;
    }
    .footer-col ul a:hover {
        color: var(--color-primary);
        padding-left: 4px;
    }
    .footer-contact li {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 14px;
        line-height: 1.6;
        color: rgba(255, 255, 255, 0.7);
    }
    .footer-contact i {
        width: 18px;
        color: var(--color-primary);
        font-size: 13px;
        text-align: center;
        flex-shrink: 0;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        padding: 18px 0;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.5);
        text-align: center;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .main-nav {
            display: none;
        }
        .nav-toggle {
            display: flex;
        }
        .site-header.nav-open {
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-line);
            box-shadow: 0 8px 24px rgba(30, 64, 120, 0.08);
        }
        .site-header.nav-open .main-nav {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: 64px;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.98);
            padding: 16px 24px 24px;
            gap: 4px;
            border-bottom: 1px solid var(--color-line);
            border-radius: 0 0 16px 16px;
            box-shadow: 0 16px 32px rgba(30, 64, 120, 0.08);
        }
        .site-header.nav-open .main-nav .nav-link {
            padding: 12px 16px;
            font-size: 16px;
            border-radius: 10px;
        }
        .site-header.nav-open .header-left {
            align-items: flex-start;
        }
        .page-hero {
            padding: 140px 0 56px;
        }
        .page-hero h1 {
            font-size: 32px;
        }
        .compare-grid {
            grid-template-columns: 1fr;
        }
        .steps-list {
            grid-template-columns: 1fr;
        }
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
    }
    @media (max-width: 768px) {
        :root {
            --space-section: 56px;
        }
        .category-main {
            padding: 48px 0 var(--space-section);
        }
        .info-card {
            padding: 28px 22px;
        }
        .info-card h2 {
            font-size: 22px;
        }
        .page-hero h1 {
            font-size: 28px;
        }
        .page-hero .page-desc {
            font-size: 15px;
        }
        .hero-badges {
            flex-direction: column;
            align-items: flex-start;
        }
        .cta-inner {
            flex-direction: column;
            align-items: flex-start;
            text-align: left;
        }
        .cta-text h2 {
            font-size: 24px;
        }
        .sidebar-inner {
            position: static;
            margin-top: 32px;
        }
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .footer-contact li {
            font-size: 13px;
        }
        .brand-text {
            font-size: 15px;
        }
    }
    @media (max-width: 520px) {
        .brand-text {
            font-size: 14px;
        }
        .brand-icon {
            width: 32px;
            height: 32px;
            font-size: 12px;
        }
        .nav-cta {
            display: none;
        }
        .page-hero {
            padding: 120px 0 48px;
        }
        .page-hero h1 {
            font-size: 24px;
        }
        .info-card {
            padding: 24px 18px;
        }
        .compare-col {
            padding: 22px 18px;
        }
        .tier-item {
            padding: 20px 18px;
        }
        .steps-list li {
            padding: 18px 16px 18px 54px;
        }
        .steps-list li::before {
            left: 14px;
            top: 16px;
            width: 28px;
            height: 28px;
            font-size: 13px;
        }
        .recommend-block .row .columns {
            padding-bottom: 20px;
        }
        .cta-banner {
            padding: 48px 0;
        }
        .cta-banner .btn-white {
            width: 100%;
        }
        .footer-grid {
            gap: 24px;
        }
    }