/* roulang page: index */
:root {
    --page-bg: #F4F8FC;
    --card-bg: #FFFFFF;
    --brand-light: #EAF3FB;
    --primary: #2F76B5;
    --primary-hover: #1E5A8E;
    --primary-dark: #163B5C;
    --cta: #E8782D;
    --cta-hover: #D46622;
    --success: #0E9D8B;
    --title-color: #17283A;
    --body-color: #3B5068;
    --muted-color: #71869D;
    --border-color: #E1EAF3;
    --shadow-card: 0 12px 32px rgba(21,58,96,0.08);
    --shadow-hover: 0 20px 44px rgba(21,58,96,0.14);
    --radius-card: 16px;
    --radius-btn: 10px;
    --radius-pill: 999px;
    --font-main: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-main);
    background-color: var(--page-bg);
    color: var(--body-color);
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
.section { padding: 104px 0; }
.section-head { text-align: center; margin-bottom: 56px; }
.section-head .eyebrow {
    display: inline-block;
    background: var(--brand-light);
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: var(--radius-pill);
    margin-bottom: 16px;
}
.section-head h2 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    color: var(--title-color);
    letter-spacing: 0.5px;
}
.section-head h2::after {
    content: "";
    display: block;
    width: 28px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    margin: 12px auto 0;
}
.section-head p {
    margin-top: 14px;
    color: var(--muted-color);
    font-size: 16px;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-btn);
    font-size: 16px;
    font-weight: 600;
    line-height: 1.2;
    transition: all 0.25s ease;
    position: relative;
}
.btn-primary {
    background: var(--cta);
    color: #fff;
    box-shadow: 0 4px 16px rgba(232,120,45,0.25);
}
.btn-primary:hover {
    background: var(--cta-hover);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(232,120,45,0.3);
}
.btn-primary:active {
    transform: translateY(0);
    opacity: 0.95;
}
.btn-secondary {
    background: #fff;
    color: var(--primary);
    border: 1.5px solid var(--primary);
}
.btn-secondary:hover {
    background: var(--brand-light);
    border-color: var(--primary-hover);
}
.btn-secondary:active {
    opacity: 0.85;
}
.btn:focus-visible {
    outline: 3px solid rgba(47,118,181,0.3);
    outline-offset: 2px;
}
.tag {
    display: inline-block;
    background: var(--brand-light);
    color: var(--primary-dark);
    font-size: 13px;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: var(--radius-pill);
    line-height: 1.5;
}
.badge-new {
    background: var(--success);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: var(--radius-pill);
}
.online-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    margin-right: 6px;
    vertical-align: middle;
    position: relative;
}
.online-dot::after {
    content: "";
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    border: 2px solid rgba(14,157,139,0.3);
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0% { transform: scale(0.8); opacity: 0.8; }
    70% { transform: scale(1.4); opacity: 0; }
    100% { transform: scale(0.8); opacity: 0; }
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border-color);
    transition: box-shadow 0.3s ease;
}
.site-header.scrolled {
    box-shadow: 0 4px 20px rgba(21,58,96,0.06);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.logo-badge {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(47,118,181,0.3);
    position: relative;
    overflow: hidden;
}
.logo-badge::before {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    top: 6px;
    right: 4px;
}
.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--title-color);
    letter-spacing: 1px;
    line-height: 1.2;
}
.logo-text small {
    display: block;
    font-size: 11px;
    font-weight: 400;
    color: var(--muted-color);
    letter-spacing: 2px;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}
.main-nav a {
    padding: 8px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--body-color);
    border-radius: 8px;
    transition: color 0.2s ease, background 0.2s ease;
    position: relative;
}
.main-nav a:hover {
    color: var(--primary);
    background: var(--brand-light);
}
.main-nav a.active {
    color: var(--primary);
    font-weight: 600;
}
.main-nav a.active::after {
    content: "";
    position: absolute;
    bottom: 2px;
    left: 16px;
    right: 16px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
.header-actions .btn {
    padding: 10px 20px;
    font-size: 14px;
}
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    background: var(--brand-light);
}
.menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-menu {
    display: none;
    background: #fff;
    border-top: 1px solid var(--border-color);
    padding: 16px 24px 24px;
    flex-direction: column;
    gap: 8px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
    padding: 14px 16px;
    font-size: 16px;
    color: var(--body-color);
    border-radius: 10px;
    transition: background 0.2s ease;
}
.mobile-menu a:hover { background: var(--brand-light); }
.mobile-menu a.active { color: var(--primary); font-weight: 600; background: var(--brand-light); }
.mobile-menu .btn { margin-top: 10px; width: 100%; }

/* Hero */
.hero {
    position: relative;
    padding: 80px 0 90px;
    background: linear-gradient(to right, rgba(244,248,252,0.92) 0%, rgba(244,248,252,0.85) 55%, rgba(234,243,251,0.7) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    border-bottom: 1px solid var(--border-color);
}
.hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}
.hero-content .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.8);
    border: 1px solid var(--border-color);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: var(--radius-pill);
    margin-bottom: 24px;
    backdrop-filter: blur(4px);
}
.hero-content h1 {
    font-size: clamp(30px, 5vw, 42px);
    font-weight: 700;
    line-height: 1.25;
    color: var(--title-color);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}
.hero-content h1 .highlight {
    color: var(--primary);
}
.hero-content .hero-sub {
    font-size: 18px;
    color: var(--body-color);
    line-height: 1.6;
    margin-bottom: 8px;
    max-width: 460px;
}
.hero-content .hero-desc {
    font-size: 15px;
    color: var(--muted-color);
    margin-bottom: 32px;
    max-width: 460px;
}
.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}
.hero-trust {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}
.trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--body-color);
    font-weight: 500;
}
.trust-item i {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--success);
    color: #fff;
    font-style: normal;
    font-size: 13px;
    line-height: 22px;
    text-align: center;
    display: inline-block;
}
.hero-visual {
    position: relative;
}
.device-frame {
    background: #fff;
    border-radius: 20px;
    padding: 12px;
    box-shadow: var(--shadow-card);
    position: relative;
    border: 1px solid var(--border-color);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.device-frame:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.device-frame img {
    border-radius: 12px;
    width: 100%;
    height: auto;
    min-height: 280px;
    object-fit: cover;
}
.float-badge {
    position: absolute;
    background: rgba(255,255,255,0.94);
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(21,58,96,0.12);
    padding: 10px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--title-color);
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--border-color);
    backdrop-filter: blur(6px);
}
.float-badge i {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: var(--brand-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-style: normal;
    font-size: 14px;
}
.float-badge.badge-1 {
    top: 30px;
    left: -20px;
    animation: floatY 4s ease-in-out infinite;
}
.float-badge.badge-2 {
    bottom: 30px;
    right: -20px;
    animation: floatY 4s ease-in-out infinite 1s;
}
@keyframes floatY {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

/* Features 交错图文 */
.features {
    background: var(--card-bg);
}
.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}
.feature-row:last-child { margin-bottom: 0; }
.feature-row.reverse .feature-media { order: 2; }
.feature-row.reverse .feature-content { order: 1; }
.feature-media img {
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.feature-media:hover img {
    transform: scale(1.02);
    box-shadow: var(--shadow-hover);
}
.feature-tag {
    display: inline-block;
    background: var(--brand-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: var(--radius-pill);
    margin-bottom: 16px;
}
.feature-content h3 {
    font-size: clamp(20px, 2.5vw, 26px);
    font-weight: 700;
    color: var(--title-color);
    margin-bottom: 16px;
    line-height: 1.4;
}
.feature-content p {
    color: var(--body-color);
    margin-bottom: 16px;
    font-size: 15px;
    line-height: 1.8;
}
.feature-content .more-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 600;
    font-size: 15px;
    margin-top: 4px;
    transition: gap 0.2s ease;
}
.feature-content .more-link:hover {
    gap: 12px;
    color: var(--primary-hover);
}

/* 功能截图轮播 */
.gallery-section {
    background: var(--page-bg);
    overflow: hidden;
}
.gallery-wrapper {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}
.gallery-track {
    display: flex;
    gap: 24px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding: 20px 8px 32px;
    scrollbar-width: thin;
    scrollbar-color: var(--primary) var(--border-color);
}
.gallery-track::-webkit-scrollbar { height: 6px; }
.gallery-track::-webkit-scrollbar-track { background: var(--border-color); border-radius: 6px; }
.gallery-track::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 6px; }
.gallery-card {
    flex: 0 0 340px;
    scroll-snap-align: start;
    background: var(--card-bg);
    border-radius: var(--radius-card);
    padding: 12px 12px 24px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.gallery-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.gallery-card img {
    border-radius: 12px;
    width: 100%;
    height: 180px;
    object-fit: cover;
    margin-bottom: 16px;
}
.gallery-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--title-color);
    margin-bottom: 8px;
    padding: 0 8px;
}
.gallery-card p {
    font-size: 14px;
    color: var(--muted-color);
    line-height: 1.6;
    padding: 0 8px;
}
.gallery-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 8px;
}
.gallery-arrow {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: #fff;
    border: 1px solid var(--border-color);
    color: var(--primary);
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    cursor: pointer;
}
.gallery-arrow:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.gallery-dots {
    display: flex;
    gap: 8px;
}
.gallery-dots .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--border-color);
    transition: background 0.2s ease, width 0.2s ease;
}
.gallery-dots .dot.active {
    background: var(--primary);
    width: 24px;
    border-radius: 4px;
}

/* 系统要求 */
.system-section {
    background: linear-gradient(to bottom, var(--brand-light), rgba(244,248,252,0.4));
}
.system-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: stretch;
}
.requirement-list {
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 32px;
    border: 1px solid var(--border-color);
}
.requirement-list h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--title-color);
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}
.req-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border-color);
}
.req-item:last-child { border-bottom: none; }
.req-item .req-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--brand-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-style: normal;
    font-weight: 700;
    font-size: 16px;
    flex-shrink: 0;
}
.req-item .req-name {
    font-size: 14px;
    color: var(--muted-color);
    font-weight: 500;
    width: 80px;
    flex-shrink: 0;
}
.req-item .req-value {
    font-size: 15px;
    color: var(--title-color);
    font-weight: 500;
    line-height: 1.4;
}
.version-card {
    background: var(--primary-dark);
    border-radius: var(--radius-card);
    color: #fff;
    padding: 32px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: 0 16px 40px rgba(22,59,92,0.25);
}
.version-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}
.version-card .version-number {
    font-size: 42px;
    font-weight: 800;
    margin: 16px 0 24px;
    letter-spacing: 1px;
    font-family: "Roboto", "DIN Alternate", sans-serif;
}
.version-info {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-top: 1px solid rgba(255,255,255,0.15);
    font-size: 14px;
}
.version-info .label { color: rgba(255,255,255,0.7); }
.version-info .value { font-weight: 600; }
.version-status {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(14,157,139,0.2);
    color: #6FE3D2;
    font-size: 13px;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    margin-top: 20px;
    align-self: flex-start;
}

/* 评价墙 */
.testimonials {
    background: var(--card-bg);
}
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.testimonial-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-card);
    padding: 28px;
    box-shadow: 0 4px 16px rgba(21,58,96,0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
}
.testimonial-stars {
    color: #F5A623;
    font-size: 15px;
    letter-spacing: 2px;
    margin-bottom: 14px;
}
.testimonial-card blockquote {
    font-size: 15px;
    line-height: 1.7;
    color: var(--body-color);
    margin-bottom: 20px;
    border-left: none;
    padding: 0;
    font-style: normal;
}
.testimonial-author {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}
.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.avatar.blue { background: var(--primary); }
.avatar.green { background: var(--success); }
.avatar.orange { background: var(--cta); }
.author-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--title-color);
}
.author-platform {
    font-size: 13px;
    color: var(--muted-color);
}

/* 下载按钮组 */
.download-section {
    background: var(--page-bg);
    position: relative;
    overflow: hidden;
}
.download-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    opacity: 0.06;
}
.download-section .container { position: relative; z-index: 1; }
.download-content {
    text-align: center;
    background: var(--card-bg);
    border-radius: 24px;
    padding: 56px 40px;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    max-width: 900px;
    margin: 0 auto;
}
.download-content h2 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    color: var(--title-color);
    margin-bottom: 16px;
}
.download-content p {
    color: var(--muted-color);
    max-width: 560px;
    margin: 0 auto 36px;
}
.download-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}
.download-buttons .btn-main {
    padding: 16px 42px;
    font-size: 18px;
}
.platform-buttons {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 32px;
}
.platform-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--body-color);
    transition: all 0.2s ease;
    cursor: pointer;
}
.platform-btn:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(21,58,96,0.1);
    color: var(--primary);
}
.platform-btn i {
    font-style: normal;
    font-size: 18px;
}
.download-bottom {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}
.qr-placeholder {
    width: 120px;
    height: 120px;
    border: 1px dashed var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    color: var(--muted-color);
    background: var(--page-bg);
    flex-direction: column;
    gap: 4px;
}
.version-note {
    text-align: center;
    font-size: 13px;
    color: var(--muted-color);
}

/* 最新资讯 */
.news-section {
    background: var(--card-bg);
}
.news-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.news-card {
    display: flex;
    gap: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-card);
    padding: 16px;
    transition: all 0.25s ease;
    cursor: pointer;
}
.news-card:hover {
    background: var(--brand-light);
    border-color: var(--primary);
    transform: translateX(4px);
    box-shadow: 0 8px 24px rgba(21,58,96,0.08);
}
.news-thumb {
    flex-shrink: 0;
    width: 90px;
    height: 68px;
    border-radius: 10px;
    overflow: hidden;
    background: var(--brand-light);
}
.news-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.news-body {
    flex: 1;
    min-width: 0;
}
.news-body h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--title-color);
    margin-bottom: 6px;
    line-height: 1.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.news-body p {
    font-size: 14px;
    color: var(--muted-color);
    line-height: 1.6;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--muted-color);
}
.news-meta .tag { font-size: 12px; padding: 2px 10px; }
.news-empty {
    text-align: center;
    padding: 60px 20px;
    background: var(--page-bg);
    border-radius: var(--radius-card);
    font-size: 15px;
    color: var(--muted-color);
}

/* FAQ */
.faq-section {
    background: var(--page-bg);
}
.faq-wrap {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-card);
    margin-bottom: 14px;
    overflow: hidden;
    transition: box-shadow 0.25s ease;
}
.faq-item.active {
    box-shadow: var(--shadow-card);
    border-color: var(--primary);
}
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: var(--title-color);
    transition: color 0.2s ease;
}
.faq-question:hover { color: var(--primary); }
.faq-question .arrow {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: transform 0.3s ease, background 0.2s ease;
    flex-shrink: 0;
    color: var(--primary);
}
.faq-item.active .faq-question .arrow {
    transform: rotate(45deg);
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}
.faq-answer {
    max-height: 0;
    padding: 0 24px;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    color: var(--body-color);
    font-size: 15px;
    line-height: 1.75;
}
.faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 24px 20px;
}

/* CTA */
.cta-section {
    background: var(--primary-dark);
    color: #fff;
    padding: 80px 0;
}
.cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
}
.cta-text h2 {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    margin-bottom: 12px;
}
.cta-text p {
    color: rgba(255,255,255,0.8);
    font-size: 16px;
    max-width: 500px;
}
.cta-inner .btn-primary {
    padding: 16px 42px;
    font-size: 17px;
    flex-shrink: 0;
}

/* Footer */
.site-footer {
    background: #102A3E;
    color: #B8C9DA;
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}
.footer-brand .logo-text {
    color: #fff;
}
.footer-brand .logo-text small { color: #7A94AA; }
.footer-brand p {
    margin-top: 18px;
    font-size: 14px;
    line-height: 1.7;
    color: #9DB2C5;
    max-width: 300px;
}
.footer-col h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 10px;
}
.footer-col h4::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--primary);
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a {
    font-size: 14px;
    color: #9DB2C5;
    transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-col ul li a:hover {
    color: #fff;
    padding-left: 4px;
}
.footer-contact li {
    display: flex;
    gap: 10px;
    font-size: 14px;
    color: #9DB2C5;
    margin-bottom: 12px;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 13px;
    color: #6E88A0;
}

/* 响应式 */
@media (max-width: 1024px) {
    .section { padding: 80px 0; }
    .header-actions .btn-secondary { display: none; }
    .main-nav { gap: 4px; }
    .main-nav a { padding: 8px 12px; }
}
@media (max-width: 768px) {
    .section { padding: 60px 0; }
    .section-head { margin-bottom: 40px; }
    .main-nav { display: none; }
    .header-actions .btn { display: none; }
    .menu-toggle { display: flex; }
    .mobile-menu { position: absolute; top: 72px; left: 0; right: 0; z-index: 99; box-shadow: 0 12px 30px rgba(21,58,96,0.1); }
    .hero { padding: 60px 0; }
    .hero-inner { grid-template-columns: 1fr; gap: 36px; }
    .hero-visual { order: -1; }
    .hero-visual { max-width: 480px; margin: 0 auto; }
    .feature-row { grid-template-columns: 1fr; gap: 32px; }
    .feature-row.reverse .feature-media { order: 1; }
    .feature-row.reverse .feature-content { order: 2; }
    .gallery-card { flex-basis: 280px; }
    .system-grid { grid-template-columns: 1fr; }
    .testimonial-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .download-content { padding: 40px 24px; }
    .cta-inner { flex-direction: column; text-align: center; }
}
@media (max-width: 640px) {
    .container { padding: 0 16px; }
    .hero-cta { flex-direction: column; }
    .hero-cta .btn { width: 100%; }
    .float-badge.badge-1 { left: -8px; }
    .float-badge.badge-2 { right: -8px; }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .download-buttons .btn-main { width: 100%; }
    .platform-buttons { flex-direction: column; align-items: center; }
    .news-card { flex-direction: column; }
    .news-thumb { width: 100%; height: 150px; }
}
@media (max-width: 480px) {
    .hero-content h1 { font-size: 28px; }
    .gallery-card { flex-basis: 240px; }
}

/* roulang page: category1 */
:root {
            --page-bg: #F4F8FC;
            --card-bg: #FFFFFF;
            --brand-light: #EAF3FB;
            --brand-blue: #2F76B5;
            --brand-blue-hover: #1E5A8E;
            --deep-blue: #163B5C;
            --cta-orange: #E8782D;
            --cta-orange-hover: #D46622;
            --success-green: #0E9D8B;
            --title-ink: #17283A;
            --body-text: #3B5068;
            --muted-text: #71869D;
            --line-color: #E1EAF3;
            --shadow-card: 0 12px 32px rgba(21, 58, 96, 0.08);
            --shadow-hover: 0 20px 44px rgba(21, 58, 96, 0.14);
            --radius-card: 16px;
            --radius-btn: 10px;
            --radius-pill: 999px;
            --font-main: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

        a:hover {
            color: var(--brand-blue-hover);
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid transparent;
            transition: box-shadow 0.2s ease, border-color 0.2s ease;
        }

        .site-header.scrolled {
            border-bottom-color: var(--line-color);
            box-shadow: 0 8px 24px rgba(21, 58, 96, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 24px;
        }

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

        .logo-badge {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-blue), var(--deep-blue));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            box-shadow: 0 4px 12px rgba(47, 118, 181, 0.28);
        }

        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .logo-text strong {
            font-size: 19px;
            font-weight: 700;
            color: var(--title-ink);
            letter-spacing: 0.5px;
        }

        .logo-text small {
            font-size: 12px;
            color: var(--muted-text);
            letter-spacing: 1px;
        }

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

        .main-nav a {
            padding: 8px 14px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            color: var(--body-text);
            position: relative;
            transition: color 0.2s ease, background 0.2s ease;
        }

        .main-nav a:hover {
            color: var(--brand-blue);
            background: var(--brand-light);
        }

        .main-nav a.active {
            color: var(--brand-blue);
            font-weight: 600;
        }

        .main-nav a.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--brand-blue);
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            border: 1.5px solid transparent;
            cursor: pointer;
            transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease, transform 0.15s ease;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--cta-orange);
            color: #fff;
            box-shadow: 0 6px 16px rgba(232, 120, 45, 0.28);
        }

        .btn-primary:hover {
            background: var(--cta-orange-hover);
            color: #fff;
            box-shadow: 0 10px 24px rgba(232, 120, 45, 0.36);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 4px 12px rgba(232, 120, 45, 0.2);
        }

        .btn-secondary {
            background: #fff;
            border-color: var(--brand-blue);
            color: var(--brand-blue);
        }

        .btn-secondary:hover {
            background: var(--brand-light);
            border-color: var(--brand-blue-hover);
            color: var(--brand-blue-hover);
        }

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

        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: none;
            background: var(--brand-light);
            border-radius: 10px;
            cursor: pointer;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
        }

        .nav-toggle span {
            width: 20px;
            height: 2px;
            background: var(--title-ink);
            border-radius: 2px;
            transition: transform 0.25s ease, opacity 0.25s ease;
        }

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

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

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

        /* ===== 分类页 Hero ===== */
        .category-hero {
            position: relative;
            min-height: 280px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: var(--card-bg);
        }

        .category-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .category-hero-bg::after {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(255, 255, 255, 0.6);
        }

        .category-hero-content {
            position: relative;
            z-index: 2;
            max-width: 1200px;
            margin: 0 auto;
            padding: 64px 24px;
            width: 100%;
        }

        .category-hero-content h1 {
            font-size: clamp(28px, 4.5vw, 38px);
            font-weight: 700;
            color: var(--title-ink);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .category-hero-content h1 span {
            color: var(--brand-blue);
        }

        .category-hero-content p {
            font-size: 17px;
            color: var(--body-text);
            max-width: 560px;
            margin-bottom: 24px;
            line-height: 1.7;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid var(--line-color);
            border-radius: var(--radius-pill);
            padding: 7px 16px;
            font-size: 13px;
            font-weight: 500;
            color: var(--deep-blue);
            box-shadow: 0 2px 8px rgba(21, 58, 96, 0.06);
        }

        .hero-badge::before {
            content: "✓";
            color: var(--success-green);
            font-weight: 700;
        }

        /* ===== 分类导航胶囊 ===== */
        .category-tabs {
            background: var(--card-bg);
            border-bottom: 1px solid var(--line-color);
            padding: 18px 0;
        }

        .category-tabs-inner {
            display: flex;
            gap: 10px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .category-tabs-inner::-webkit-scrollbar {
            display: none;
        }

        .category-tab {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--muted-text);
            background: #fff;
            border: 1px solid var(--line-color);
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .category-tab:hover {
            border-color: var(--brand-blue);
            color: var(--brand-blue);
        }

        .category-tab.active {
            background: var(--brand-blue);
            border-color: var(--brand-blue);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(47, 118, 181, 0.25);
        }

        /* ===== 区块通用 ===== */
        .section-block {
            padding: 80px 0;
        }

        .section-header {
            margin-bottom: 48px;
            text-align: center;
        }

        .section-header h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            color: var(--title-ink);
            letter-spacing: -0.3px;
            line-height: 1.3;
            position: relative;
            display: inline-block;
            padding-bottom: 14px;
        }

        .section-header h2::after {
            content: "";
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            bottom: 0;
            width: 44px;
            height: 3px;
            border-radius: 3px;
            background: var(--brand-blue);
        }

        .section-header p {
            margin-top: 16px;
            color: var(--muted-text);
            font-size: 15px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 指南内容区 ===== */
        .guide-overview {
            padding: 80px 0;
        }

        .overview-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 48px;
            align-items: start;
        }

        .overview-text h2 {
            font-size: 22px;
            font-weight: 600;
            color: var(--title-ink);
            margin-bottom: 14px;
            padding-left: 14px;
            border-left: 4px solid var(--brand-blue);
            line-height: 1.4;
        }

        .overview-text p {
            margin-bottom: 32px;
            color: var(--body-text);
            line-height: 1.8;
        }

        .overview-text .intro-label {
            display: inline-block;
            background: var(--brand-light);
            color: var(--brand-blue);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
        }

        /* 热门指南排行 */
        .overview-list {
            background: linear-gradient(160deg, #f0f6fb 0%, #ffffff 60%);
            border-radius: var(--radius-card);
            border: 1px solid var(--line-color);
            padding: 28px;
            box-shadow: var(--shadow-card);
        }

        .overview-list-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--title-ink);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .overview-list-title::after {
            content: "TOP";
            font-size: 11px;
            background: var(--cta-orange);
            color: #fff;
            padding: 2px 8px;
            border-radius: var(--radius-pill);
            letter-spacing: 1px;
            font-weight: 700;
        }

        .overview-list-sub {
            font-size: 13px;
            color: var(--muted-text);
            margin-bottom: 22px;
        }

        .guide-rank-card {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: #fff;
            border-radius: 14px;
            padding: 18px;
            margin-bottom: 14px;
            border: 1px solid var(--line-color);
            transition: box-shadow 0.25s ease, transform 0.25s ease, border-color 0.2s ease;
            cursor: pointer;
        }

        .guide-rank-card:last-child {
            margin-bottom: 0;
        }

        .guide-rank-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            border-color: var(--brand-blue);
        }

        .guide-rank-num {
            font-size: 22px;
            font-weight: 800;
            color: var(--line-color);
            line-height: 1;
            min-width: 32px;
            text-align: center;
            font-family: "Roboto", "DIN Alternate", sans-serif;
        }

        .guide-rank-card:first-child .guide-rank-num {
            color: var(--cta-orange);
        }

        .guide-rank-card:nth-child(2) .guide-rank-num {
            color: var(--brand-blue);
        }

        .guide-rank-info {
            flex: 1;
            min-width: 0;
        }

        .guide-rank-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--title-ink);
            margin-bottom: 4px;
        }

        .guide-rank-info p {
            font-size: 13px;
            color: var(--muted-text);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .guide-rank-meta {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--brand-light);
            color: var(--deep-blue);
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
        }

        .tag-hot {
            background: rgba(232, 120, 45, 0.12);
            color: var(--cta-orange);
        }

        .tag-safe {
            background: rgba(14, 157, 139, 0.12);
            color: var(--success-green);
        }

        .online-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--success-green);
            display: inline-block;
            position: relative;
        }

        .online-dot::after {
            content: "";
            position: absolute;
            inset: -4px;
            border-radius: 50%;
            background: rgba(14, 157, 139, 0.2);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% {
                transform: scale(0.6);
                opacity: 0.8;
            }
            70% {
                transform: scale(1.4);
                opacity: 0;
            }
            100% {
                opacity: 0;
            }
        }

        .guide-rank-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-blue);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .guide-rank-link:hover {
            color: var(--brand-blue-hover);
        }

        /* ===== 图文块 ===== */
        .guide-feature {
            background: var(--card-bg);
            padding: 80px 0;
            border-top: 1px solid var(--line-color);
            border-bottom: 1px solid var(--line-color);
        }

        .feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            align-items: center;
        }

        .feature-img {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            position: relative;
        }

        .feature-img img {
            width: 100%;
            height: 340px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .feature-img-caption {
            position: absolute;
            left: 18px;
            bottom: 18px;
            background: rgba(255, 255, 255, 0.92);
            border-radius: 10px;
            padding: 8px 14px;
            font-size: 13px;
            font-weight: 500;
            color: var(--deep-blue);
            box-shadow: 0 4px 12px rgba(21, 58, 96, 0.12);
            backdrop-filter: blur(4px);
        }

        .feature-text h2 {
            font-size: clamp(22px, 2.5vw, 30px);
            font-weight: 700;
            color: var(--title-ink);
            line-height: 1.35;
            margin-bottom: 18px;
        }

        .feature-text p {
            color: var(--body-text);
            margin-bottom: 24px;
            line-height: 1.75;
        }

        .feature-points {
            margin-bottom: 28px;
        }

        .feature-points li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            margin-bottom: 14px;
            color: var(--body-text);
            font-size: 15px;
        }

        .feature-points li::before {
            content: "✓";
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--brand-light);
            color: var(--brand-blue);
            font-size: 12px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-top: 3px;
        }

        .feature-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 24px;
        }

        .feature-tags .tag {
            background: var(--brand-light);
            color: var(--deep-blue);
        }

        /* ===== 提示条 ===== */
        .notice-strip {
            padding: 36px 0;
        }

        .notice-box {
            background: linear-gradient(90deg, rgba(14, 157, 139, 0.08), rgba(47, 118, 181, 0.06), rgba(14, 157, 139, 0.08));
            border: 1px solid rgba(14, 157, 139, 0.25);
            border-radius: 14px;
            padding: 20px 28px;
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .notice-icon {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(14, 157, 139, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }

        .notice-text {
            flex: 1;
            min-width: 240px;
        }

        .notice-text strong {
            font-size: 16px;
            color: var(--title-ink);
            display: block;
            margin-bottom: 2px;
        }

        .notice-text span {
            font-size: 14px;
            color: var(--muted-text);
            line-height: 1.6;
        }

        .notice-status {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #fff;
            border-radius: var(--radius-pill);
            padding: 6px 14px;
            font-size: 13px;
            font-weight: 600;
            color: var(--success-green);
            box-shadow: 0 2px 8px rgba(21, 58, 96, 0.06);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
        }

        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
            background: var(--card-bg);
            border-radius: var(--radius-card);
            border: 1px solid var(--line-color);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .faq-item {
            border-bottom: 1px solid var(--line-color);
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 22px 28px;
            background: none;
            border: none;
            cursor: pointer;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--title-ink);
            line-height: 1.5;
            transition: background 0.2s ease;
        }

        .faq-question:hover {
            background: rgba(234, 243, 251, 0.4);
        }

        .faq-icon {
            position: relative;
            width: 20px;
            height: 20px;
            flex-shrink: 0;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--brand-blue);
            border-radius: 2px;
            transition: transform 0.25s ease, opacity 0.25s ease;
        }

        .faq-icon::before {
            width: 16px;
            height: 2px;
            top: 9px;
            left: 2px;
        }

        .faq-icon::after {
            width: 2px;
            height: 16px;
            top: 2px;
            left: 9px;
        }

        .faq-item.open .faq-icon::after {
            transform: scaleY(0);
        }

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

        .faq-answer-inner {
            padding: 0 28px 24px;
            color: var(--body-text);
            font-size: 15px;
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
        }

        /* ===== CTA ===== */
        .guide-cta {
            padding: 60px 0 90px;
        }

        .cta-card {
            background: linear-gradient(150deg, var(--deep-blue) 0%, #1a4a72 100%);
            border-radius: 22px;
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 20px 44px rgba(21, 58, 96, 0.2);
        }

        .cta-card::before {
            content: "";
            position: absolute;
            top: -60%;
            right: -20%;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(232, 120, 45, 0.12);
        }

        .cta-card::after {
            content: "";
            position: absolute;
            bottom: -60%;
            left: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(47, 118, 181, 0.18);
        }

        .cta-content {
            position: relative;
            z-index: 2;
        }

        .cta-content h2 {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.35;
        }

        .cta-content p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            margin-bottom: 32px;
        }

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

        .cta-buttons .btn-primary {
            background: var(--cta-orange);
            box-shadow: 0 8px 24px rgba(232, 120, 45, 0.4);
        }

        .cta-buttons .btn-primary:hover {
            background: var(--cta-orange-hover);
        }

        .cta-buttons .btn-light {
            background: rgba(255, 255, 255, 0.14);
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
            backdrop-filter: blur(4px);
        }

        .cta-buttons .btn-light:hover {
            background: rgba(255, 255, 255, 0.24);
            border-color: #fff;
            color: #fff;
        }

        .cta-note {
            margin-top: 18px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #102A3E;
            color: rgba(255, 255, 255, 0.72);
            padding: 72px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .logo {
            margin-bottom: 18px;
        }

        .footer-brand .logo-badge {
            background: linear-gradient(135deg, var(--brand-blue), #3a8ed4);
        }

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

        .footer-brand .logo-text small {
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-col h4::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 24px;
            height: 2px;
            border-radius: 2px;
            background: var(--brand-blue);
        }

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

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

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

        .footer-contact li {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding: 22px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .overview-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .feature-grid {
                gap: 36px;
            }

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

        @media (max-width: 768px) {
            .header-inner {
                height: 64px;
            }

            .main-nav {
                display: none;
            }

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

            .nav-toggle {
                display: flex;
            }

            .main-nav.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                padding: 20px 24px 28px;
                box-shadow: 0 16px 32px rgba(21, 58, 96, 0.1);
                border-bottom: 1px solid var(--line-color);
                gap: 4px;
                z-index: 99;
            }

            .main-nav.open a {
                padding: 14px 12px;
                font-size: 16px;
                width: 100%;
                border-radius: 10px;
            }

            .main-nav.open a.active::after {
                display: none;
            }

            .main-nav.open a.active {
                background: var(--brand-light);
            }

            .main-nav.open .nav-mobile-actions {
                display: flex;
                flex-direction: column;
                gap: 10px;
                margin-top: 16px;
                padding-top: 16px;
                border-top: 1px solid var(--line-color);
                width: 100%;
            }

            .main-nav.open .nav-mobile-actions .btn {
                display: flex;
                width: 100%;
            }

            .category-hero {
                min-height: 240px;
            }

            .category-hero-content {
                padding: 44px 20px;
            }

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

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

            .section-block,
            .guide-overview,
            .guide-feature,
            .faq-section {
                padding: 60px 0;
            }

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

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

            .notice-box {
                padding: 16px 20px;
            }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                padding-bottom: 40px;
            }

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

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

            .logo-text strong {
                font-size: 17px;
            }

            .logo-text small {
                font-size: 11px;
            }

            .category-hero-content h1 {
                font-size: 23px;
            }

            .hero-badges {
                gap: 8px;
            }

            .hero-badge {
                padding: 5px 12px;
                font-size: 12px;
            }

            .category-tabs-inner {
                gap: 8px;
            }

            .category-tab {
                padding: 7px 16px;
                font-size: 13px;
            }

            .overview-list {
                padding: 20px;
            }

            .guide-rank-card {
                padding: 14px;
                gap: 12px;
            }

            .guide-rank-num {
                font-size: 18px;
                min-width: 24px;
            }

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

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

/* roulang page: article */
/* ========== 设计变量 ========== */
:root {
  --page-bg: #F4F8FC;
  --card-bg: #FFFFFF;
  --brand-light: #EAF3FB;
  --primary: #2F76B5;
  --primary-hover: #1E5A8E;
  --deep-blue: #163B5C;
  --cta-orange: #E8782D;
  --cta-hover: #D46622;
  --success-green: #0E9D8B;
  --heading: #17283A;
  --body: #3B5068;
  --muted: #71869D;
  --line: #E1EAF3;
  --shadow-card: 0 12px 32px rgba(21,58,96,0.08);
  --shadow-hover: 0 20px 44px rgba(21,58,96,0.14);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-tag: 999px;
  --font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Noto Sans SC", system-ui, sans-serif;
}

/* ========== 基础 Reset ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--page-bg);
  color: var(--body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; border: none; cursor: pointer; }
input, textarea { font-family: inherit; }

/* ========== 容器 ========== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== 按钮 ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  background: var(--cta-orange);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  box-shadow: 0 6px 18px rgba(232,120,45,0.28);
  transition: all .2s ease;
  border: none;
}
.btn-primary:hover {
  background: var(--cta-hover);
  box-shadow: 0 10px 24px rgba(232,120,45,0.36);
  transform: translateY(-2px);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(232,120,45,0.24);
  opacity: .95;
}
.btn-primary:focus-visible,
.btn-secondary:focus-visible {
  outline: 3px solid rgba(47,118,181,0.35);
  outline-offset: 2px;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  background: #fff;
  color: var(--primary);
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: 1.5px solid var(--primary);
  transition: all .2s ease;
}
.btn-secondary:hover {
  background: var(--brand-light);
  transform: translateY(-2px);
}
.btn-secondary:active {
  transform: translateY(0);
  opacity: .92;
}
.btn-sm { padding: 10px 20px; font-size: 14px; }

/* ========== Header / 导航 ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: box-shadow .25s ease, border-color .25s ease;
}
.site-header.scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 20px rgba(21,58,96,0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-badge {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--deep-blue));
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(47,118,181,0.3);
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--heading);
  line-height: 1.2;
  display: flex;
  flex-direction: column;
}
.logo-text small {
  font-size: 12px;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0.5px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.main-nav a {
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--body);
  border-radius: 8px;
  transition: color .2s ease, background .2s ease;
  position: relative;
}
.main-nav a:hover {
  color: var(--primary);
  background: var(--brand-light);
}
.main-nav a.active {
  color: var(--primary);
  font-weight: 600;
}
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: 8px;
  border-radius: 8px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--heading);
  border-radius: 2px;
  transition: all .25s 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); }

/* ========== 面包屑 ========== */
.breadcrumb-bar {
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 16px 0;
}
.breadcrumb-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}
.breadcrumb-inner a {
  color: var(--primary);
  font-weight: 500;
  transition: color .2s;
}
.breadcrumb-inner a:hover { color: var(--primary-hover); }
.breadcrumb-sep { color: #C2D2E2; }
.breadcrumb-current {
  color: var(--body);
  font-weight: 500;
  max-width: 360px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========== 文章主体 ========== */
.article-body {
  padding: 48px 0 24px;
}
.article-container {
  max-width: 760px;
  background: var(--card-bg);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 44px 48px 36px;
}
.article-h1 {
  font-size: clamp(24px, 3.2vw, 32px);
  line-height: 1.3;
  color: var(--heading);
  font-weight: 700;
  margin-bottom: 14px;
}
.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 22px;
  font-size: 13px;
  color: var(--muted);
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}
.article-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-meta .meta-icon {
  width: 16px;
  height: 16px;
  color: var(--primary);
  opacity: 0.8;
}
.article-content {
  font-size: 16px;
  line-height: 1.85;
  color: var(--body);
  word-wrap: break-word;
}
.article-content > * + * { margin-top: 16px; }
.article-content p { margin-bottom: 8px; }
.article-content h2 {
  font-size: 24px;
  font-weight: 600;
  color: var(--heading);
  margin: 40px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  line-height: 1.4;
}
.article-content h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--heading);
  margin: 32px 0 12px;
  line-height: 1.45;
}
.article-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--heading);
  margin: 24px 0 10px;
}
.article-content blockquote {
  margin: 20px 0;
  padding: 16px 20px;
  background: var(--brand-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 10px 10px 0;
  color: var(--body);
}
.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 20px 0 8px;
}
.article-content .img-caption,
.article-content figcaption {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  margin-bottom: 20px;
}
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(47,118,181,0.4);
  transition: text-decoration-color .2s;
}
.article-content a:hover {
  text-decoration-color: var(--primary);
}
.article-content ul,
.article-content ol {
  margin: 8px 0 16px 20px;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content li::marker { color: var(--primary); }
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 15px;
}
.article-content th {
  background: var(--brand-light);
  color: var(--heading);
  font-weight: 600;
  text-align: left;
}
.article-content th,
.article-content td {
  padding: 12px 16px;
  border: 1px solid var(--line);
}
.article-content tr:nth-child(even) td { background: #F9FCFE; }
.table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* ========== 分享行 ========== */
.article-share {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.share-label {
  font-size: 14px;
  color: var(--muted);
  font-weight: 500;
}
.copy-link-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  background: var(--brand-light);
  color: var(--primary);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: all .2s ease;
}
.copy-link-btn:hover {
  background: rgba(47,118,181,0.16);
}
.copy-link-btn:active {
  transform: scale(0.97);
}
.copy-tip {
  font-size: 13px;
  color: var(--success-green);
  font-weight: 500;
  opacity: 0;
  transform: translateY(-4px);
  transition: all .3s ease;
  pointer-events: none;
}
.copy-tip.show {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 内容未找到 ========== */
.article-not-found {
  text-align: center;
  padding: 40px 20px;
}
.not-found-icon {
  font-size: 52px;
  margin-bottom: 18px;
  display: inline-block;
}
.article-not-found h2 {
  font-size: 26px;
  color: var(--heading);
  margin-bottom: 10px;
}
.article-not-found p {
  font-size: 16px;
  color: var(--muted);
  margin-bottom: 28px;
}

/* ========== 文章CTA ========== */
.article-cta-section {
  padding: 64px 0 24px;
}
.cta-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: linear-gradient(135deg, #F0F7FD 0%, #E4F0FA 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 36px 44px;
  box-shadow: var(--shadow-card);
  flex-wrap: wrap;
}
.cta-text h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--heading);
  margin-bottom: 6px;
}
.cta-text p {
  font-size: 15px;
  color: var(--muted);
}
.cta-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ========== 相关推荐 ========== */
.related-section {
  padding: 56px 0 64px;
}
.section-heading {
  font-size: clamp(24px, 3vw, 30px);
  font-weight: 700;
  color: var(--heading);
  text-align: center;
  margin-bottom: 36px;
  position: relative;
}
.section-heading::after {
  content: "";
  display: block;
  width: 48px;
  height: 4px;
  background: var(--primary);
  border-radius: 4px;
  margin: 14px auto 0;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 36px;
}
.related-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: all .25s ease;
  display: block;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.related-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  background: var(--brand-light);
}
.related-info {
  padding: 18px 20px 20px;
}
.related-info h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--heading);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-info h3:hover { color: var(--primary); }
.related-date {
  font-size: 13px;
  color: var(--muted);
}

/* ========== 返回入口 ========== */
.back-links {
  display: flex;
  justify-content: center;
  gap: 28px;
  flex-wrap: wrap;
}
.back-link {
  font-size: 15px;
  font-weight: 500;
  color: var(--primary);
  padding: 6px 12px;
  border-radius: 8px;
  transition: background .2s, color .2s;
}
.back-link:hover {
  background: var(--brand-light);
  color: var(--primary-hover);
}

/* ========== 页脚 ========== */
.site-footer {
  background: #102A3E;
  color: #A7BDD0;
  padding: 64px 0 0;
  margin-top: 40px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .logo {
  margin-bottom: 16px;
}
.footer-brand .logo-text {
  color: #E9F2FA;
}
.footer-brand .logo-text small {
  color: #7E9BB3;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: #A7BDD0;
  max-width: 300px;
}
.footer-col h4 {
  color: #E9F2FA;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-col ul {
  list-style: none;
}
.footer-col li {
  margin-bottom: 10px;
}
.footer-col a {
  color: #A7BDD0;
  font-size: 14px;
  transition: color .2s, padding-left .2s;
}
.footer-col a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-contact li {
  font-size: 14px;
  color: #A7BDD0;
  line-height: 1.6;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: #7E9BB3;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .header-inner { height: 64px; }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 20px;
    box-shadow: 0 20px 40px rgba(21,58,96,0.12);
    border-bottom: 1px solid var(--line);
    display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav a {
    padding: 12px 12px;
    font-size: 16px;
    border-radius: 8px;
  }
  .main-nav a.active::after { display: none; }
  .main-nav a.active {
    background: var(--brand-light);
  }
  .header-actions { display: none; }
  .nav-toggle { display: flex; }
  .article-container { padding: 28px 20px 24px; }
  .article-h1 { font-size: 24px; }
  .article-meta { gap: 14px; }
  .cta-box { padding: 28px 24px; }
  .cta-actions .btn-primary,
  .cta-actions .btn-secondary {
    padding: 12px 22px;
    font-size: 15px;
  }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .breadcrumb-inner { font-size: 13px; }
  .breadcrumb-current { max-width: 160px; }
  .article-container { padding: 24px 16px 20px; border-radius: 12px; }
  .article-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
  .cta-box { flex-direction: column; text-align: center; }
  .cta-actions { justify-content: center; }
  .back-links { gap: 16px; }
}