/* roulang page: index */
:root {
  --primary: #0b1f3a;
  --primary-600: #12365c;
  --accent: #00b4d8;
  --accent-light: #e0f7fb;
  --accent-2: #6ee7ff;
  --warning: #f59e0b;
  --white: #ffffff;
  --bg: #f4f7fb;
  --text: #1e2a3a;
  --text-muted: #6b7a90;
  --border: #dfe5ee;
  --radius: 16px;
  --radius-lg: 28px;
  --shadow-sm: 0 3px 12px rgba(13, 34, 61, .07);
  --shadow-md: 0 8px 30px rgba(13, 34, 61, .11);
  --shadow-lg: 0 16px 48px rgba(13, 34, 61, .15);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --section-space: 80px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.75; padding-top: 78px; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: all .2s ease; }
button { font-family: inherit; cursor: pointer; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 2; }

/* ===== Header / Nav ===== */
.site-header { position: fixed; top: 14px; left: 0; right: 0; z-index: 100; pointer-events: none; }
.nav-shell { max-width: 1280px; margin: 0 auto; padding: 0 20px; pointer-events: auto; }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(255,255,255,.92); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-radius: 60px; padding: 10px 12px 10px 24px;
  box-shadow: 0 8px 30px rgba(11,31,58,.12); border: 1px solid rgba(255,255,255,.7);
}
.nav-inner:hover { box-shadow: 0 12px 38px rgba(11,31,58,.16); }
.brand-logo { font-size: 22px; font-weight: 800; color: var(--primary); letter-spacing: -0.3px; display: inline-flex; align-items: center; gap: 8px; }
.brand-logo i { color: var(--accent); font-size: 20px; }
.main-nav { display: flex; align-items: center; gap: 6px; }
.nav-link { padding: 9px 18px; border-radius: 40px; font-size: 15px; font-weight: 600; color: var(--text); display: inline-flex; align-items: center; gap: 6px; transition: all .2s ease; }
.nav-link:hover { background: var(--accent-light); color: var(--primary); }
.nav-link.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(11,31,58,.25); }
.nav-toggle { display: none; background: var(--primary); color: #fff; border: none; width: 40px; height: 40px; border-radius: 50%; font-size: 16px; align-items: center; justify-content: center; }

/* ===== Page Banner ===== */
.page-banner { position: relative; background-size: cover; background-position: center; padding: 76px 0; color: #fff; }
.page-banner::before { content: ""; position: absolute; inset: 0; background: linear-gradient(110deg, rgba(11,31,58,.88), rgba(0,180,216,.35)); }
.page-banner .container { z-index: 2; }
.page-banner h1 { font-size: 40px; font-weight: 800; margin-bottom: 10px; }
.page-banner p { font-size: 17px; color: rgba(255,255,255,.85); max-width: 620px; }

/* ===== Section ===== */
.section-eyebrow { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }
.section-title { font-size: 34px; font-weight: 800; color: var(--primary); line-height: 1.3; margin-bottom: 14px; }
.section-lead { font-size: 17px; color: var(--text-muted); max-width: 620px; }

/* ===== Latest ===== */
.latest-section { padding: var(--section-space) 0; }
.latest-list { margin-top: 36px; }
.news-item { display: flex; align-items: center; gap: 16px; background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 20px 24px; margin-bottom: 14px; box-shadow: var(--shadow-sm); transition: all .25s ease; }
.news-item:hover { box-shadow: var(--shadow-md); transform: translateX(6px); border-color: var(--accent); }
.news-cat { flex-shrink: 0; background: var(--accent-light); color: var(--accent); padding: 4px 14px; border-radius: 30px; font-size: 12px; font-weight: 700; }
.news-title { flex: 1; font-size: 16px; font-weight: 600; color: var(--text); }
.news-date { font-size: 13px; color: var(--text-muted); flex-shrink: 0; }
.empty-tip { background: #fff; border: 1px solid var(--border); padding: 32px; border-radius: 16px; color: var(--text-muted); text-align: center; }

/* ===== Metrics ===== */
.metrics-section { padding: 0 0 var(--section-space); }
.metrics-panel { background: var(--primary); border-radius: var(--radius-lg); padding: 48px 36px; box-shadow: var(--shadow-lg); position: relative; overflow: hidden; }
.metrics-panel::before { content: ""; position: absolute; top: -60px; right: -40px; width: 220px; height: 220px; background: rgba(0,180,216,.15); border-radius: 50%; }
.metric-item { text-align: center; padding: 20px 10px; }
.metric-num { display: block; font-size: 42px; font-weight: 800; color: #fff; line-height: 1.2; }
.metric-num small { font-size: 22px; color: var(--accent-2); }
.metric-label { color: rgba(255,255,255,.7); font-size: 14px; margin-top: 4px; }
.metric-item + .metric-item { border-left: 1px solid rgba(255,255,255,.12); }

/* ===== Timeline ===== */
.timeline-section { padding: 0 0 var(--section-space); }
.timeline { position: relative; padding-left: 32px; max-width: 800px; margin: 0 auto; }
.timeline::before { content: ""; position: absolute; left: 12px; top: 0; bottom: 0; width: 2px; background: linear-gradient(to bottom, var(--accent), var(--primary)); }
.timeline-item { position: relative; margin-bottom: 32px; }
.timeline-item::before { content: ""; position: absolute; left: -27px; top: 8px; width: 14px; height: 14px; border-radius: 50%; background: var(--accent); border: 3px solid #fff; box-shadow: 0 0 0 2px var(--accent); }
.timeline-card { background: #fff; border-radius: var(--radius); padding: 24px 28px; box-shadow: var(--shadow-sm); border: 1px solid var(--border); }
.timeline-card h4 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.timeline-card p { font-size: 15px; color: var(--text-muted); }
.timeline-date { display: inline-block; font-size: 13px; color: var(--accent); font-weight: 700; margin-bottom: 8px; }

/* ===== Subscribe / CTA ===== */
.cta-section { position: relative; padding: var(--section-space) 0; background-size: cover; background-position: center; text-align: center; }
.cta-overlay { position: absolute; inset: 0; background: linear-gradient(120deg, rgba(11,31,58,.9), rgba(0,180,216,.7)); }
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 { font-size: 36px; font-weight: 800; color: #fff; margin-bottom: 14px; }
.cta-section p { color: rgba(255,255,255,.85); font-size: 17px; max-width: 540px; margin: 0 auto 28px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 30px; border-radius: 46px; font-size: 15px; font-weight: 700; border: 2px solid transparent; transition: all .25s ease; cursor: pointer; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 24px rgba(0,180,216,.35); }
.btn-primary:hover { background: #009dc0; transform: translateY(-2px); box-shadow: 0 12px 32px rgba(0,180,216,.45); }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 10px 28px rgba(0,0,0,.15); }

/* ===== Footer ===== */
.site-footer { background: #081628; color: rgba(255,255,255,.75); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1.2fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer-logo { font-size: 22px; font-weight: 800; color: #fff; display: inline-flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.footer-logo i { color: var(--accent); }
.footer-brand p { font-size: 15px; color: rgba(255,255,255,.6); max-width: 320px; }
.footer-links h4, .footer-contact h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 14px; }
.footer-links a { display: block; color: rgba(255,255,255,.65); font-size: 15px; padding: 5px 0; transition: all .2s ease; }
.footer-links a:hover { color: var(--accent-2); padding-left: 4px; }
.footer-contact p { font-size: 15px; color: rgba(255,255,255,.65); padding: 4px 0; }
.footer-bottom { padding: 22px 0; text-align: center; font-size: 14px; color: rgba(255,255,255,.45); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .page-banner h1 { font-size: 34px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  body { padding-top: 70px; }
  .nav-toggle { display: flex; }
  .main-nav { display: none; position: absolute; top: 58px; left: 20px; right: 20px; background: #fff; border-radius: 20px; padding: 14px; flex-direction: column; box-shadow: var(--shadow-lg); border: 1px solid var(--border); }
  .main-nav.open { display: flex; }
  .nav-link { width: 100%; padding: 12px 18px; }
  .page-banner h1 { font-size: 28px; }
  .section-title { font-size: 28px; }
  .metric-item + .metric-item { border-left: none; border-top: 1px solid rgba(255,255,255,.12); }
  .metrics-panel { padding: 32px 20px; }
  .news-item { flex-wrap: wrap; }
  .news-date { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 520px) {
  .page-banner { padding: 60px 0; }
  .page-banner h1 { font-size: 23px; }
  .btn { width: 100%; justify-content: center; }
  .timeline { padding-left: 24px; }
  .timeline-card { padding: 20px; }
  .cta-section h2 { font-size: 28px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --bg: #f8fafc;
    --white: #ffffff;
    --dark: #0f172a;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --radius: 14px;
    --radius-sm: 8px;
    --radius-lg: 24px;
    --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
    --transition: all 0.3s ease;
    --space-sm: 24px;
    --space: 48px;
    --space-lg: 80px;
}

/* ===== Reset/base ===== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html {
    scroll-behavior: smooth;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    font-size: 16px;
}
img {
    max-width: 100%;
    display: block;
}
a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}
ul,
ol {
    list-style: none;
}
button {
    cursor: pointer;
    border: none;
    font-family: inherit;
    background: none;
}
input,
select,
textarea {
    font-family: inherit;
    font-size: inherit;
}
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
.section-padding {
    padding: var(--space-lg) 0;
}
.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--space);
}
.section-head .tag {
    display: inline-block;
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: 30px;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}
.section-head h2 {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.25;
    color: var(--text);
    margin-bottom: 14px;
}
.section-head p {
    color: var(--text-light);
    font-size: 16px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    border: 2px solid transparent;
}
.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
}
.btn-outline {
    border-color: rgba(255, 255, 255, 0.7);
    color: #fff;
}
.btn-outline:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: #fff;
    transform: translateY(-2px);
}
.btn-light {
    background: #fff;
    color: var(--primary);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}
.btn-light:hover {
    background: #f1f5f9;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

/* ===== 导航（悬浮胶囊） ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 200;
    padding: 16px 0 0;
}
.nav-shell {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: 0 8px 32px rgba(15, 23, 42, 0.1);
    border-radius: 56px;
    padding: 10px 16px 10px 24px;
}
.brand-logo {
    font-size: 20px;
    font-weight: 800;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}
.brand-logo i {
    color: var(--primary);
    font-size: 24px;
}
.nav-toggle {
    display: none;
    font-size: 22px;
    color: var(--text);
    padding: 8px 12px;
    border-radius: 50%;
    transition: var(--transition);
}
.nav-toggle:hover {
    background: #f1f5f9;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
}
.nav-link {
    padding: 10px 20px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}
.nav-link i {
    font-size: 14px;
    color: var(--text-light);
    transition: var(--transition);
}
.nav-link:hover {
    background: #f1f5f9;
    color: var(--primary);
}
.nav-link:hover i {
    color: var(--primary);
}
.nav-link.active {
    background: var(--primary);
    color: #fff;
    font-weight: 600;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}
.nav-link.active i {
    color: #fff;
}
.nav-cta {
    margin-left: 12px;
    background: var(--dark);
    color: #fff;
    padding: 10px 24px;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 600;
}
.nav-cta:hover {
    background: var(--primary);
    transform: translateY(-2px);
}
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    .main-nav {
        position: absolute;
        top: calc(100% + 8px);
        left: 24px;
        right: 24px;
        flex-direction: column;
        background: #fff;
        border-radius: 20px;
        box-shadow: var(--shadow-lg);
        padding: 16px;
        gap: 6px;
        display: none;
    }
    .main-nav.is-open {
        display: flex;
    }
    .nav-link,
    .nav-cta {
        width: 100%;
        justify-content: flex-start;
        padding: 14px 20px;
        border-radius: 12px;
    }
    .nav-cta {
        margin-left: 0;
        text-align: center;
        justify-content: center;
    }
}

/* ===== Banner 横幅 ===== */
.page-banner {
    position: relative;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.82), rgba(37, 99, 235, 0.65)),
        url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    padding: 110px 0 90px;
    color: #fff;
    overflow: hidden;
}
.page-banner::before {
    content: '';
    position: absolute;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    top: -160px;
    right: -100px;
}
.page-banner::after {
    content: '';
    position: absolute;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
    bottom: -90px;
    left: 10%;
}
.breadcrumb {
    font-size: 14px;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.8);
}
.breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
}
.breadcrumb a:hover {
    color: #fff;
}
.breadcrumb i {
    font-size: 10px;
    color: rgba(255, 255, 255, 0.5);
}
.banner-content {
    max-width: 720px;
    position: relative;
    z-index: 1;
}
.banner-content h1 {
    font-size: 44px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 18px;
}
.banner-content h1 span {
    color: var(--accent-light);
}
.banner-content p {
    font-size: 17px;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
}
.banner-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}
@media (max-width: 768px) {
    .page-banner {
        padding: 80px 0 60px;
    }
    .banner-content h1 {
        font-size: 30px;
    }
    .banner-content p {
        font-size: 15px;
    }
}

/* ===== 快速上手四步 ===== */
.steps-section {
    padding: var(--space-lg) 0;
    background: var(--white);
}
.steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.step-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    position: relative;
    transition: var(--transition);
}
.step-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.step-num {
    font-size: 42px;
    font-weight: 800;
    line-height: 1;
    color: rgba(37, 99, 235, 0.2);
    margin-bottom: 16px;
    display: block;
}
.step-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}
.step-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}
.step-icon {
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    margin-bottom: 18px;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}
@media (max-width: 1024px) {
    .steps-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 520px) {
    .steps-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 核心功能详解 ===== */
.features-section {
    padding: var(--space-lg) 0;
    background: var(--bg);
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}
.feature-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
}
.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}
.feature-thumb {
    height: 200px;
    overflow: hidden;
    position: relative;
}
.feature-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.feature-card:hover .feature-thumb img {
    transform: scale(1.05);
}
.feature-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(15, 23, 42, 0.2));
}
.feature-body {
    padding: 24px;
}
.feature-body .tag {
    display: inline-block;
    background: rgba(245, 158, 11, 0.12);
    color: var(--accent);
    font-size: 12px;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 20px;
    margin-bottom: 12px;
}
.feature-body h3 {
    font-size: 19px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}
.feature-body p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}
.feature-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    margin-top: 14px;
    transition: var(--transition);
}
.feature-link:hover {
    gap: 10px;
    color: var(--primary-dark);
}
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 600px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== 服务数据指标 ===== */
.stats-section {
    padding: var(--space-lg) 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: #fff;
    position: relative;
    overflow: hidden;
}
.stats-section::before {
    content: '';
    position: absolute;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.15);
    top: -120px;
    right: -100px;
}
.stats-inner {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    text-align: center;
    position: relative;
    z-index: 1;
}
.stat-item .stat-value {
    font-size: 48px;
    font-weight: 800;
    line-height: 1;
    color: var(--accent-light);
    margin-bottom: 10px;
}
.stat-item .stat-label {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
}
.stat-divider {
    width: 40px;
    height: 3px;
    background: var(--primary-light);
    margin: 16px auto;
    border-radius: 4px;
}
@media (max-width: 768px) {
    .stats-inner {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
    .stat-item .stat-value {
        font-size: 36px;
    }
}

/* ===== FAQ ===== */
.faq-section {
    padding: var(--space-lg) 0;
    background: var(--white);
}
.faq-list {
    max-width: 760px;
    margin: 0 auto;
}
.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 14px;
    background: var(--bg);
    transition: var(--transition);
    overflow: hidden;
}
.faq-item.is-open {
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.08);
    background: #fff;
}
.faq-question {
    width: 100%;
    text-align: left;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}
.faq-question i {
    font-size: 18px;
    color: var(--primary);
    transition: transform 0.3s ease;
    flex-shrink: 0;
}
.faq-item.is-open .faq-question i {
    transform: rotate(180deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}
.faq-answer-inner {
    padding: 0 24px 20px;
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
    border-top: 1px solid var(--border);
    padding-top: 16px;
}

/* ===== CTA ===== */
.cta-section {
    padding: var(--space-lg) 0;
    background: var(--bg);
}
.cta-box {
    background: linear-gradient(135deg, #1e40af 0%, var(--primary) 100%);
    border-radius: var(--radius-lg);
    padding: 56px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-box::before {
    content: '';
    position: absolute;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    top: -80px;
    left: -60px;
}
.cta-box::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
    bottom: -120px;
    right: -60px;
}
.cta-box h2 {
    font-size: 32px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}
.cta-box p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 28px;
    position: relative;
    z-index: 1;
}
.cta-actions {
    display: flex;
    gap: 14px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}
@media (max-width: 768px) {
    .cta-box {
        padding: 40px 24px;
    }
    .cta-box h2 {
        font-size: 24px;
    }
}

/* ===== 页脚 ===== */
.site-footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 0;
}
.site-footer .container {
    max-width: 1200px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 40px;
}
.footer-logo {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
}
.footer-logo i {
    color: var(--primary-light);
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    max-width: 320px;
}
.footer-links h4,
.footer-contact h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 18px;
}
.footer-links a {
    display: block;
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    padding: 6px 0;
    transition: var(--transition);
}
.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 6px;
}
.footer-contact p {
    font-size: 14px;
    padding: 5px 0;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 20px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}
@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .footer-bottom {
        padding: 20px;
    }
}

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

/* ===== 响应式微调 ===== */
@media (max-width: 1024px) {
    .section-head h2 {
        font-size: 28px;
    }
    .banner-content h1 {
        font-size: 36px;
    }
}
@media (max-width: 768px) {
    .section-padding {
        padding: 50px 0;
    }
    .section-head {
        margin-bottom: 30px;
    }
    .section-head h2 {
        font-size: 26px;
    }
    .banner-actions .btn {
        padding: 11px 22px;
        font-size: 14px;
    }
}
@media (max-width: 520px) {
    .container {
        padding: 0 16px;
    }
    .nav-shell {
        padding: 0 16px;
    }
    .banner-content h1 {
        font-size: 28px;
    }
    .steps-grid,
    .features-grid,
    .stats-inner {
        grid-template-columns: 1fr;
    }
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --dark-bg: #0f172a;
            --light-bg: #f6f8fc;
            --white: #ffffff;
            --text: #0f172a;
            --text-light: #5b6b7f;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.12);
            --transition: all 0.3s ease;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            color: var(--text);
            background: var(--white);
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        ul {
            list-style: none;
        }
        .container {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 通用按钮与标签 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
        }
        .btn-outline {
            background: transparent;
            color: var(--white);
            border-color: rgba(255, 255, 255, 0.6);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }
        .btn-dark {
            background: var(--dark-bg);
            color: #fff;
        }
        .btn-dark:hover {
            background: #1e293b;
            transform: translateY(-2px);
        }
        .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
        }
        .tag-accent {
            background: rgba(245, 158, 11, 0.12);
            color: #b45309;
        }
        .tag-green {
            background: rgba(16, 185, 129, 0.1);
            color: #047857;
        }

        /* ===== 悬浮胶囊导航 ===== */
        .site-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 999;
            padding: 0 16px;
        }
        .nav-shell {
            max-width: 1240px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-radius: 60px;
            box-shadow: 0 8px 32px rgba(15, 23, 42, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.6);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 24px;
        }
        .brand-logo {
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            letter-spacing: -0.5px;
        }
        .brand-logo i {
            font-size: 24px;
            color: var(--accent);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 10px 20px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
        }
        .nav-link i {
            font-size: 15px;
        }
        .nav-link:hover {
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
        }
        .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--light-bg);
            color: var(--text);
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }
        .nav-toggle:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== 页面 Banner ===== */
        .page-banner {
            position: relative;
            padding: 200px 0 110px;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92), rgba(30, 64, 175, 0.82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: #fff;
            text-align: center;
        }
        .page-banner .banner-content {
            max-width: 760px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 30px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.2);
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(6px);
        }
        .banner-tag i {
            color: var(--accent-light);
        }
        .page-banner h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: -1px;
        }
        .page-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.8;
            margin-bottom: 34px;
        }
        .banner-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== 统计板块 ===== */
        .stats-section {
            padding: 80px 0 40px;
            background: var(--white);
        }
        .stat-card {
            text-align: center;
            padding: 36px 28px;
            border-radius: var(--radius);
            background: var(--white);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: var(--transition);
            margin-bottom: 24px;
        }
        .stat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(37, 99, 235, 0.3);
        }
        .stat-card i {
            font-size: 30px;
            color: var(--primary);
            margin-bottom: 14px;
            display: inline-block;
        }
        .stat-num {
            font-size: 42px;
            font-weight: 800;
            color: var(--dark-bg);
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: -1px;
        }
        .stat-card p {
            color: var(--text-light);
            font-size: 15px;
        }

        /* ===== 动态列表 ===== */
        .news-section {
            padding: 60px 0 80px;
            background: var(--light-bg);
        }
        .section-header {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
        }
        .section-header .section-tag {
            display: inline-block;
            margin-bottom: 12px;
            color: var(--primary);
            font-weight: 700;
            font-size: 14px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }
        .section-header p {
            color: var(--text-light);
            font-size: 16px;
            line-height: 1.8;
        }
        .news-card {
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            margin-bottom: 24px;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .news-card-img {
            position: relative;
            height: 200px;
            overflow: hidden;
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.05);
        }
        .news-card-img .tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(6px);
        }
        .news-card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 10px;
            transition: var(--transition);
        }
        .news-card-body h3 a:hover {
            color: var(--primary);
        }
        .news-card-body p {
            color: var(--text-light);
            font-size: 14px;
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .news-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }
        .news-meta .date {
            font-size: 13px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .news-meta .read-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .news-meta .read-more:hover {
            color: var(--primary-dark);
            gap: 10px;
        }

        /* ===== 时间线深色区块 ===== */
        .timeline-section {
            padding: 90px 0;
            background: linear-gradient(135deg, #0f172a, #1e3a8a), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            color: #fff;
        }
        .timeline-section .section-header h2,
        .timeline-section .section-header p {
            color: #fff;
        }
        .timeline-section .section-header .section-tag {
            color: var(--accent-light);
        }
        .timeline-grid {
            position: relative;
            max-width: 960px;
            margin: 0 auto;
            padding: 20px 0;
        }
        .timeline-grid::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 2px;
            background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.4), transparent);
            transform: translateX(-50%);
        }
        .timeline-item {
            position: relative;
            width: 50%;
            padding: 0 40px 40px;
        }
        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }
        .timeline-dot {
            position: absolute;
            top: 6px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--accent);
            border: 3px solid #fff;
            box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.3);
        }
        .timeline-item:nth-child(odd) .timeline-dot {
            right: -8px;
        }
        .timeline-item:nth-child(even) .timeline-dot {
            left: -8px;
        }
        .timeline-content {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius);
            padding: 24px 28px;
            backdrop-filter: blur(8px);
            transition: var(--transition);
        }
        .timeline-content:hover {
            background: rgba(255, 255, 255, 0.12);
            transform: translateY(-4px);
        }
        .timeline-time {
            font-size: 13px;
            font-weight: 700;
            color: var(--accent-light);
            letter-spacing: 1px;
            margin-bottom: 8px;
            display: block;
        }
        .timeline-content h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .timeline-content p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.7;
        }

        /* ===== 标签分类 ===== */
        .tag-section {
            padding: 80px 0;
            background: var(--white);
        }
        .tag-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            padding: 32px 22px;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            background: var(--white);
            transition: var(--transition);
            margin-bottom: 24px;
            cursor: pointer;
        }
        .tag-item:hover {
            border-color: var(--primary);
            background: rgba(37, 99, 235, 0.04);
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }
        .tag-item i {
            font-size: 32px;
            color: var(--primary);
            margin-bottom: 14px;
        }
        .tag-item h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .tag-item p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            background: var(--light-bg);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(37, 99, 235, 0.4);
            box-shadow: var(--shadow);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 26px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            gap: 16px;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 18px;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            display: none;
            padding: 0 26px 22px;
            color: var(--text-light);
            line-height: 1.8;
            font-size: 15px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 90px 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(30, 58, 138, 0.88)), url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 600px;
            margin: 0 auto 34px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark-bg);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 50px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 14px;
        }
        .footer-logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            max-width: 340px;
        }
        .footer-links h4,
        .footer-contact h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-links a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            padding: 5px 0;
        }
        .footer-links a:hover {
            color: var(--accent-light);
        }
        .footer-contact p {
            font-size: 14px;
            padding: 5px 0;
        }
        .footer-bottom {
            padding: 22px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .page-banner {
                padding: 170px 0 90px;
            }
            .page-banner h1 {
                font-size: 38px;
            }
            .timeline-grid::before {
                left: 20px;
            }
            .timeline-item,
            .timeline-item:nth-child(odd),
            .timeline-item:nth-child(even) {
                width: 100%;
                left: 0;
                text-align: left;
                padding: 0 0 32px 50px;
            }
            .timeline-item:nth-child(odd) .timeline-dot,
            .timeline-item:nth-child(even) .timeline-dot {
                left: 12px;
                right: auto;
            }
        }

        @media (max-width: 768px) {
            .nav-shell {
                border-radius: 30px;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: calc(100% + 10px);
                left: 0;
                right: 0;
                flex-direction: column;
                background: rgba(255, 255, 255, 0.98);
                border-radius: 24px;
                padding: 16px;
                box-shadow: var(--shadow-lg);
                gap: 6px;
                border: 1px solid var(--border);
            }
            .main-nav.open {
                display: flex;
            }
            .nav-link {
                width: 100%;
                justify-content: flex-start;
                padding: 12px 18px;
            }
            .page-banner h1 {
                font-size: 30px;
            }
            .page-banner p {
                font-size: 16px;
            }
            .section-header h2 {
                font-size: 27px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .stat-card {
                margin-bottom: 16px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-inner {
                padding: 10px 16px;
            }
            .brand-logo {
                font-size: 18px;
            }
            .page-banner {
                padding: 140px 0 70px;
            }
            .page-banner h1 {
                font-size: 25px;
            }
            .banner-actions,
            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .stat-num {
                font-size: 32px;
            }
            .news-card-img {
                height: 170px;
            }
            .timeline-content {
                padding: 18px;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer {
                padding: 0 18px 18px;
            }
            .cta-section h2 {
                font-size: 27px;
            }
        }

/* roulang page: article */
:root {
  --primary: #2563eb;
  --primary-soft: #e8f0ff;
  --primary-deep: #1e40af;
  --accent: #06b6d4;
  --accent-soft: #e0f8ff;
  --bg: #f4f7fc;
  --bg-deep: #0b1220;
  --text: #0f172a;
  --text-body: #334155;
  --text-weak: #64748b;
  --border: #e2e8f0;
  --card: #ffffff;
  --radius: 20px;
  --radius-sm: 12px;
  --radius-lg: 28px;
  --shadow: 0 10px 40px rgba(15, 23, 42, .07);
  --shadow-md: 0 20px 50px rgba(15, 23, 42, .10);
  --shadow-hover: 0 24px 60px rgba(37, 99, 235, .15);
  --space-section: 100px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text-body);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
a:focus-visible, button:focus-visible { outline: 3px solid rgba(37, 99, 235, .4); outline-offset: 2px; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 30px; border-radius: 60px; font-size: .95rem; font-weight: 600;
  border: none; transition: all .3s ease;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 24px rgba(37, 99, 235, .25); }
.btn-primary:hover { background: var(--primary-deep); transform: translateY(-2px); box-shadow: 0 12px 32px rgba(30, 64, 175, .3); }
.btn-light { background: #fff; color: var(--bg-deep); }
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(255, 255, 255, .2); }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255, 255, 255, .5); }
.btn-outline:hover { background: rgba(255, 255, 255, .1); border-color: #fff; }

.badge {
  display: inline-flex; align-items: center; gap: 6px; padding: 6px 16px;
  border-radius: 40px; font-size: .78rem; font-weight: 600;
  background: var(--primary-soft); color: var(--primary);
}
.badge-soft { background: var(--accent-soft); color: #0891b2; }
.muted { color: var(--text-weak); font-size: .92rem; }

.site-header {
  position: fixed; top: 16px; left: 0; right: 0; z-index: 999; padding: 0 24px;
}
.nav-shell { max-width: 1200px; margin: 0 auto; }
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, .65);
  border-radius: 80px;
  padding: 10px 12px 10px 24px;
  box-shadow: 0 10px 40px rgba(15, 23, 42, .10);
}
.brand-logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 1.3rem; font-weight: 800; color: var(--text); letter-spacing: -0.02em;
}
.brand-logo i {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; border-radius: 12px; font-size: 1rem;
}
.main-nav { display: flex; align-items: center; gap: 6px; }
.nav-link {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 10px 18px; border-radius: 40px;
  font-size: .92rem; font-weight: 600; color: var(--text-body);
  transition: all .25s ease;
}
.nav-link i { font-size: .9rem; color: var(--text-weak); transition: color .25s; }
.nav-link:hover { background: var(--primary-soft); color: var(--primary); }
.nav-link:hover i { color: var(--primary); }
.nav-link.active { background: var(--primary); color: #fff; box-shadow: 0 6px 20px rgba(37, 99, 235, .32); }
.nav-link.active i { color: #fff; }
.nav-toggle {
  display: none; background: var(--primary); border: none; color: #fff;
  width: 42px; height: 42px; border-radius: 50%; font-size: 1rem;
  align-items: center; justify-content: center;
}

.page-banner {
  position: relative; padding: 200px 0 110px;
  background-size: cover; background-position: center; background-repeat: no-repeat;
  color: #fff;
}
.banner-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(2, 6, 23, .92) 0%, rgba(15, 23, 42, .75) 60%, rgba(37, 99, 235, .35) 100%);
}
.banner-content { position: relative; z-index: 2; max-width: 860px; }
.breadcrumb {
  display: flex; align-items: center; flex-wrap: wrap; gap: 8px;
  font-size: .88rem; color: rgba(255, 255, 255, .75); margin-bottom: 20px;
}
.breadcrumb a { color: rgba(255, 255, 255, .9); transition: color .2s; }
.breadcrumb a:hover { color: #fff; text-decoration: underline; }
.breadcrumb i { font-size: .6rem; opacity: .6; }
.page-banner h1 {
  font-size: 2.8rem; line-height: 1.25; font-weight: 800;
  letter-spacing: -0.02em; margin-bottom: 20px;
  text-shadow: 0 4px 30px rgba(0, 0, 0, .3);
}
.banner-meta { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.banner-time { display: inline-flex; align-items: center; gap: 8px; font-size: .9rem; color: rgba(255, 255, 255, .8); }

.article-section { padding: var(--space-section) 0; }
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 40px;
  align-items: start;
}
.article-main {
  background: var(--card); border-radius: var(--radius-lg);
  padding: 50px; box-shadow: var(--shadow); position: relative;
}
.article-meta-top {
  display: flex; align-items: center; flex-wrap: wrap; gap: 14px;
  margin-bottom: 28px; padding-bottom: 28px; border-bottom: 1px solid var(--border);
}
.article-tag {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 18px; border-radius: 40px;
  background: var(--primary-soft); color: var(--primary);
  font-size: .82rem; font-weight: 600;
}
.article-time { display: inline-flex; align-items: center; gap: 7px; font-size: .9rem; color: var(--text-weak); }
.article-content { font-size: 1.06rem; line-height: 1.95; color: var(--text-body); }
.article-content p { margin-bottom: 1.6em; }
.article-content h2 { font-size: 1.6rem; font-weight: 700; color: var(--text); margin: 1.8em 0 .8em; }
.article-content h3 { font-size: 1.28rem; font-weight: 700; color: var(--text); margin: 1.6em 0 .7em; }
.article-content ul, .article-content ol { margin-bottom: 1.6em; padding-left: 1.5em; }
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: .45em; }
.article-content img { border-radius: 14px; margin: 1.5em 0; box-shadow: var(--shadow); }
.article-content blockquote {
  border-left: 4px solid var(--primary); background: #f8faff;
  padding: 1.1em 1.5em; border-radius: 0 14px 14px 0;
  margin-bottom: 1.6em; color: var(--text);
}
.article-content a { color: var(--primary); font-weight: 600; border-bottom: 2px solid transparent; }
.article-content a:hover { border-bottom-color: var(--primary); }
.article-content table { width: 100%; border-collapse: collapse; margin-bottom: 1.6em; }
.article-content th, .article-content td { border: 1px solid var(--border); padding: 10px 14px; }
.article-content th { background: var(--primary-soft); color: var(--text); }
.article-bottom-nav {
  display: flex; justify-content: space-between; gap: 16px;
  margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--border); font-size: .92rem;
}
.article-bottom-nav a { color: var(--primary); font-weight: 600; }
.article-bottom-nav a:hover { text-decoration: underline; }

.article-side { position: sticky; top: 110px; display: flex; flex-direction: column; gap: 24px; }
.side-card { background: var(--card); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow); }
.side-card h3 {
  font-size: 1.05rem; font-weight: 700; color: var(--text); margin-bottom: 18px;
  display: flex; align-items: center; gap: 8px;
}
.side-card h3::after { content: ""; flex: 1; height: 2px; background: linear-gradient(90deg, var(--primary), transparent); border-radius: 2px; }
.side-list { display: flex; flex-direction: column; gap: 6px; }
.side-item {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 10px 12px; border-radius: 12px;
  transition: background .2s; font-size: .92rem; line-height: 1.5;
}
.side-item:hover { background: var(--primary-soft); color: var(--primary); }
.side-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); margin-top: 8px; flex-shrink: 0; }
.side-item:hover .side-dot { background: var(--primary); }
.side-info { display: flex; flex-direction: column; gap: 14px; }
.side-info-row { display: flex; align-items: center; gap: 12px; color: var(--text-body); font-size: .92rem; }
.side-info-row i { width: 18px; color: var(--primary); }

.not-found { text-align: center; padding: 60px 20px; }
.not-found i { font-size: 3.5rem; color: var(--primary); margin-bottom: 20px; }
.not-found h2 { font-size: 1.8rem; margin-bottom: 12px; color: var(--text); }
.not-found p { color: var(--text-weak); margin-bottom: 28px; }
.not-found-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.related-section { padding: 0 0 var(--space-section); }
.section-head { display: flex; align-items: center; gap: 14px; margin-bottom: 36px; }
.section-tag {
  padding: 7px 18px; border-radius: 40px;
  background: var(--accent-soft); color: #0891b2;
  font-size: .8rem; font-weight: 700; letter-spacing: .04em;
}
.section-head h2 { font-size: 2rem; font-weight: 800; color: var(--text); letter-spacing: -0.02em; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.related-card {
  background: var(--card); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow);
  transition: transform .3s, box-shadow .3s; display: block;
}
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.related-thumb { height: 200px; background-size: cover; background-position: center; position: relative; }
.related-thumb::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 55%, rgba(2, 6, 23, .35)); }
.related-body { padding: 22px; }
.related-body h3 {
  font-size: 1.02rem; font-weight: 700; color: var(--text);
  line-height: 1.5; margin: 12px 0 8px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.related-body p {
  font-size: .88rem; color: var(--text-weak); line-height: 1.65;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.related-empty { grid-column: 1 / -1; text-align: center; padding: 60px 0; color: var(--text-weak); }

.cta-section {
  padding: 90px 0;
  background: var(--bg-deep) url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  position: relative;
}
.cta-section::before { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, rgba(11, 18, 32, .92), rgba(37, 99, 235, .65)); }
.cta-inner { position: relative; z-index: 2; display: flex; align-items: center; justify-content: space-between; gap: 30px; flex-wrap: wrap; color: #fff; }
.cta-copy h2 { font-size: 1.8rem; font-weight: 800; margin-bottom: 8px; }
.cta-copy p { color: rgba(255, 255, 255, .7); }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.site-footer { background: var(--bg-deep); color: #94a3b8; padding: 70px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 48px; padding-bottom: 44px; }
.footer-logo {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 1.25rem; font-weight: 800; color: #fff; margin-bottom: 14px;
}
.footer-logo i {
  width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; display: flex; align-items: center; justify-content: center; font-size: .9rem;
}
.footer-brand p { font-size: .92rem; line-height: 1.75; max-width: 340px; }
.footer-links h4, .footer-contact h4 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: .92rem; transition: color .2s; }
.footer-links a:hover { color: #fff; }
.footer-contact p { font-size: .92rem; margin-bottom: 6px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .08); padding: 22px 0; text-align: center; font-size: .85rem; color: #64748b; }

@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-side { position: static; flex-direction: row; flex-wrap: wrap; }
  .side-card { flex: 1; min-width: 260px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  :root { --space-section: 60px; }
  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute;
    top: calc(100% + 14px);
    left: 0; right: 0;
    background: #fff;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    padding: 12px;
    flex-direction: column;
    align-items: stretch;
    display: none;
  }
  .main-nav.open { display: flex; }
  .nav-link { justify-content: flex-start; }
  .page-banner { padding: 160px 0 80px; }
  .page-banner h1 { font-size: 2rem; }
  .article-main { padding: 30px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .related-grid { grid-template-columns: 1fr; }
  .article-main { padding: 24px 18px; border-radius: 16px; }
  .brand-logo { font-size: 1.1rem; }
  .brand-logo i { width: 32px; height: 32px; font-size: .85rem; }
  .page-banner h1 { font-size: 1.6rem; }
  .page-banner { padding: 140px 0 70px; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 6px; }
  .section-head h2 { font-size: 1.5rem; }
}