:root {
    --color-primary: #B21C26;
    --color-primary-dark: #8B151C;
    --color-primary-light: #D42E3A;
    --color-secondary: #1a1a1a;
    --color-muted: #666666;
    --color-surface: #ffffff;
    --color-surface-soft: #fafafa;
    --color-border: #e5e5e5;
    --radius-lg: 20px;
    --radius-md: 14px;
    --radius-sm: 10px;
    --shadow-sm: 0 12px 32px rgba(178, 28, 38, 0.08);
    --shadow-card: 0 30px 60px rgba(178, 28, 38, 0.12);
    --shadow-hover: 0 20px 50px rgba(178, 28, 38, 0.15);
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

/* 无障碍：跳过导航、仅屏读可见 */
.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    z-index: 1000;
    padding: 12px 20px;
    background: var(--color-primary);
    color: white;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    transition: top var(--transition-fast);
}
.skip-link:focus {
    top: 16px;
    outline: 3px solid var(--color-primary-dark);
    outline-offset: 2px;
}
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 键盘焦点可见：不依赖鼠标的清晰焦点环 */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}
.header-search-input:focus,
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 0;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}

body {
    margin: 0;
    min-width: 0;
    width: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
    color: var(--color-secondary);
    background: linear-gradient(135deg, #ffffff 0%, #fafafa 100%);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

a {
    color: var(--color-primary);
    text-decoration: none;
}

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

.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding-left: max(4vw, 16px);
    padding-right: max(4vw, 16px);
    box-sizing: border-box;
}

/* 安全区域：刘海屏/圆角屏留白（移动端） */
@supports (padding: env(safe-area-inset-left)) {
    body {
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
    .site-header {
        padding-top: env(safe-area-inset-top);
    }
}

.site-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(15, 23, 42, 0.06);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: box-shadow var(--transition-smooth);
}

/* 顶栏： slogan 左侧，热线+搜索 右侧 */
.header-top-bar {
    background: var(--color-surface-soft);
    border-bottom: 1px solid var(--color-border);
}

.header-top-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 0;
    gap: 16px;
}

.header-slogan {
    margin: 0;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.header-top-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-phone {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.95rem;
}

.header-phone:hover {
    color: var(--color-primary-dark);
}

.header-phone-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
}

.header-search-form {
    display: flex;
    align-items: stretch;
}

.header-search-input {
    width: 140px;
    padding: 6px 12px;
    border: 1px solid var(--color-border);
    border-right: none;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    font-size: 0.9rem;
    background: var(--color-surface);
}

.header-search-input:focus {
    border-color: var(--color-primary);
}

.header-search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px 12px;
    border: 1px solid var(--color-border);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    background: var(--color-surface-soft);
    color: var(--color-muted);
    cursor: pointer;
}

.header-search-btn:hover {
    background: var(--color-border);
    color: var(--color-secondary);
}

/* 搜索结果页 */
.search-input-wrap {
    display: flex;
    gap: 8px;
    width: 100%;
}

.search-input-wrap input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
}

.search-group-title {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin: 24px 0 12px;
}

.search-group-title:first-child {
    margin-top: 0;
}

.search-result-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.search-result-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}

.search-result-list li:last-child {
    border-bottom: none;
}

.search-result-list a {
    font-weight: 500;
}

.search-desc {
    margin: 4px 0 0;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
    gap: 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 18px;
    text-decoration: none;
    color: inherit;
}

.brand-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    border-radius: var(--radius-md);
    background: transparent;
    padding: 4px;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.brand-mark img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.brand:hover .brand-mark {
    transform: scale(1.05);
}

.brand-copy h1 {
    margin: 0;
    font-size: 1.2rem;
    line-height: 1.3;
    font-weight: 600;
}

.brand-copy p {
    margin: 4px 0 0;
    color: var(--color-muted);
    font-size: 0.9rem;
}

.site-nav ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 0;
    padding: 0;
}

.site-nav a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    color: var(--color-secondary);
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.site-nav a::before {
    content: "";
    position: absolute;
    bottom: 6px;
    left: 18px;
    right: 18px;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform var(--transition-fast);
}

.site-nav a:hover,
.site-nav a:focus {
    background: rgba(178, 28, 38, 0.08);
    color: var(--color-primary);
    transform: translateY(-1px);
}

.site-nav a:hover::before {
    transform: scaleX(1);
}

.site-nav .active {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(178, 28, 38, 0.3);
}

.site-nav .active::before {
    display: none;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: 12px 28px;
    font-weight: 600;
    border: 1px solid transparent;
    transition: all var(--transition-smooth);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn.primary {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 18px 30px rgba(178, 28, 38, 0.25);
}

.btn.primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 24px 48px rgba(178, 28, 38, 0.35);
}

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

.btn.ghost {
    border: 2px solid rgba(178, 28, 38, 0.4);
    color: var(--color-primary);
    background: transparent;
}

.btn.ghost:hover {
    background: rgba(178, 28, 38, 0.1);
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(178, 28, 38, 0.2);
}

.hero {
    padding: 72px 0;
}

.hero-home {
    background: 
        radial-gradient(circle at 20% 30%, rgba(178, 28, 38, 0.05), transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(178, 28, 38, 0.03), transparent 50%),
        linear-gradient(135deg, #ffffff 0%, #fafafa 100%);
    position: relative;
    overflow: hidden;
}

.hero-home::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(178, 28, 38, 0.01) 2px, rgba(178, 28, 38, 0.01) 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(178, 28, 38, 0.01) 2px, rgba(178, 28, 38, 0.01) 4px);
    pointer-events: none;
}

.hero-body {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
    gap: 48px;
    align-items: center;
}

.hero-text h2 {
    margin-top: 12px;
    font-size: clamp(2rem, 4vw, 2.8rem);
    line-height: 1.2;
}

.hero-text p {
    margin-bottom: 18px;
    color: var(--color-muted);
    max-width: 520px;
}

.eyebrow {
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--color-primary);
    font-size: 0.78rem;
    font-weight: 600;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin: 26px 0;
    flex-wrap: wrap;
}

.hero-trial-note {
    margin: 0 0 0.5rem;
    font-size: 0.9rem;
    color: var(--color-muted);
}

.hero-trial-note strong {
    color: var(--color-primary);
}

.hero-metrics {
    display: flex;
    gap: 22px;
    list-style: none;
    margin: 32px 0 0;
    padding: 0;
}

.hero-metrics li {
    background: var(--color-surface-soft);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    min-width: 150px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-smooth);
    border: 1px solid transparent;
}

.hero-metrics li:hover {
    background: var(--color-surface);
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(178, 28, 38, 0.15);
    border-color: rgba(178, 28, 38, 0.2);
}

.hero-metrics strong {
    display: block;
    font-size: 1.3rem;
    color: var(--color-secondary);
}

.hero-metrics span {
    color: var(--color-muted);
    font-size: 0.85rem;
}

.hero-sidecard {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 32px;
    position: relative;
    transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.hero-sidecard:hover {
    transform: translateY(-4px);
    box-shadow: 0 40px 80px rgba(15, 23, 42, 0.15);
}

.hero-sidecard h3 {
    margin-top: 0;
}

.hero-sidecard ul {
    list-style: none;
    padding: 0;
    margin: 24px 0 0;
    display: grid;
    gap: 16px;
}

.hero-sidecard li {
    padding-left: 26px;
    position: relative;
    color: var(--color-muted);
}

.hero-sidecard li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-primary);
    box-shadow: 0 2px 4px rgba(178, 28, 38, 0.3);
}

.section {
    padding: 70px 0;
}

.section-header {
    max-width: 620px;
    margin-bottom: 40px;
}

.section-header h2 {
    margin: 12px 0 18px;
    font-size: clamp(1.8rem, 3vw, 2.2rem);
}

.section-header p {
    margin: 0;
    color: var(--color-muted);
}

.card-grid {
    display: grid;
    gap: 26px;
}

.card-grid.three-col {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

/* 天瑞资讯 */
.section-news {
    background: var(--color-surface-soft);
}

.news-feed-wrap {
    margin-top: 20px;
}

.news-feed {
    max-height: 520px;
    overflow-y: auto;
    padding: 4px 0;
}

.news-loading {
    text-align: center;
    padding: 24px;
    color: var(--color-muted);
}

.news-cards {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.news-card {
    display: block;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    text-decoration: none;
    color: inherit;
    transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.news-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.news-card-inner {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.news-card-date {
    margin: 0 0 6px;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.news-card-title {
    flex: 1;
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.45;
    font-weight: 600;
    color: var(--color-secondary);
    min-width: 0;
}

.news-card-cover {
    flex-shrink: 0;
    width: 88px;
    height: 88px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--color-surface-soft);
}

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

@media (max-width: 640px) {
    .news-card-cover {
        width: 72px;
        height: 72px;
    }
    .news-card-inner {
        gap: 14px;
    }
}

.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-smooth);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform var(--transition-smooth);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(178, 28, 38, 0.1);
}

.card:hover::before {
    transform: scaleX(1);
}

.card h3 {
    margin-top: 0;
    transition: color var(--transition-fast);
}

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

.card p {
    color: var(--color-muted);
    margin-bottom: 18px;
}

.link-arrow {
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-fast);
}

.link-arrow:hover {
    color: var(--color-primary);
    gap: 12px;
}

.link-arrow::after {
    content: "→";
    transition: transform var(--transition-fast);
}

.link-arrow:hover::after {
    transform: translateX(6px);
}

.split-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.split-card {
    background: linear-gradient(135deg, rgba(178, 28, 38, 0.08), rgba(178, 28, 38, 0.12));
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.split-card::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--transition-smooth);
}

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

.split-card:hover::before {
    opacity: 1;
}

.bullet-list {
    margin: 24px 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 14px;
}

.bullet-list li {
    padding-left: 22px;
    position: relative;
    color: var(--color-secondary);
}

.bullet-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-size: 1.2em;
    font-weight: bold;
}

.stat-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 24px;
}

.stat-pills span {
    padding: 10px 20px;
    background: rgba(15, 23, 42, 0.12);
    border-radius: 999px;
    font-weight: 600;
    color: var(--color-secondary);
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.stat-pills span:hover {
    background: rgba(178, 28, 38, 0.15);
    color: var(--color-primary);
    transform: translateY(-2px);
    border-color: rgba(178, 28, 38, 0.3);
    box-shadow: 0 4px 12px rgba(178, 28, 38, 0.2);
}

.section-steps .stepper {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 20px;
}

.stepper li {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 20px;
    padding: 22px 24px;
    border-radius: var(--radius-lg);
    background: var(--color-surface);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-smooth);
}

.step-index {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(178, 28, 38, 0.3);
    transition: all var(--transition-smooth);
}

.stepper li:hover .step-index {
    background: var(--color-primary-dark);
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 20px rgba(178, 28, 38, 0.4);
}

.stepper li:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-hover);
}

.testimonial {
    position: relative;
    padding-top: 36px;
    transition: all var(--transition-smooth);
}

.testimonial::before {
    content: "\201C";
    position: absolute;
    top: 10px;
    left: 24px;
    font-size: 3rem;
    color: rgba(178, 28, 38, 0.25);
    transition: all var(--transition-smooth);
}

.testimonial:hover::before {
    color: var(--color-primary);
    transform: scale(1.2);
}

.testimonial:hover {
    background: linear-gradient(135deg, rgba(178, 28, 38, 0.02), rgba(178, 28, 38, 0.02));
}

.testimonial .meta {
    display: block;
    margin-top: 18px;
    font-weight: 600;
    color: var(--color-secondary);
}

.site-footer {
    background: linear-gradient(135deg, var(--color-secondary) 0%, #0a0f1a 100%);
    color: rgba(226, 232, 240, 0.9);
    padding: 48px 0 32px;
    position: relative;
    overflow: hidden;
}

.site-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(178, 28, 38, 0.5), transparent);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 18px;
    align-items: center;
}

.footer-icp {
    width: 100%;
    text-align: center;
    margin: 20px 0 0;
    padding: 0;
    font-size: 0.9rem;
}

.footer-icp .beian-gongan {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    white-space: nowrap;
}

.footer-icp .beian-gongan img {
    width: 16px;
    height: 16px;
    margin: 0;
    vertical-align: middle;
    flex-shrink: 0;
}

.footer-icp a {
    color: rgba(226, 232, 240, 0.85);
    text-decoration: none;
}

.footer-icp a:hover {
    color: #fff;
    text-decoration: underline;
}

.footer-title {
    font-weight: 700;
    margin-bottom: 4px;
}

.footer-links {
    display: flex;
    gap: 18px;
}

.footer-contact {
    margin-top: 4px;
    color: rgba(226, 232, 240, 0.9);
}

.footer-links a {
    color: rgba(226, 232, 240, 0.9);
    font-weight: 500;
}

.footer-links a:hover {
    color: white;
}

.footer-links a:focus-visible {
    color: white;
    outline-color: rgba(255, 255, 255, 0.8);
}

.footer-legal-links {
    margin-top: 8px;
    font-size: 0.85rem;
}
.footer-legal-links a {
    color: rgba(226, 232, 240, 0.85);
    text-decoration: none;
}
.footer-legal-links a:hover {
    color: white;
}

.footer-friends {
    margin-top: 8px;
    font-size: 0.85rem;
    color: rgba(226, 232, 240, 0.85);
}

.footer-friends a {
    color: rgba(226, 232, 240, 0.9);
    text-decoration: none;
}

.footer-friends a:hover {
    color: #ffffff;
    text-decoration: underline;
}

/* 政策页（隐私/条款）共用 */
.policy-content { max-width: 900px; margin: 40px auto; padding: 0 20px; }
.policy-content h1 { font-size: 2rem; margin-bottom: 12px; }
.policy-content .update-date { color: var(--color-muted); margin-bottom: 32px; }
.policy-content h2 { font-size: 1.5rem; margin-top: 32px; margin-bottom: 16px; color: var(--color-primary); }
.policy-content h3 { font-size: 1.2rem; margin-top: 24px; margin-bottom: 12px; }
.policy-content p, .policy-content li { line-height: 1.8; margin-bottom: 12px; }
.policy-content ul { padding-left: 24px; }
.policy-content .highlight { background: #fff3cd; padding: 16px; border-left: 4px solid #ffc107; margin: 20px 0; }

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 99;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(178, 28, 38, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity var(--transition-smooth), transform var(--transition-smooth), visibility var(--transition-smooth), background var(--transition-fast);
}
.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(178, 28, 38, 0.45);
}
.back-to-top:focus-visible {
    outline: 2px solid var(--color-primary-dark);
    outline-offset: 2px;
}
.back-to-top svg {
    width: 22px;
    height: 22px;
}

/* 页面通用布局 */
.hero-page {
    background: linear-gradient(135deg, rgba(178, 28, 38, 0.15), rgba(178, 28, 38, 0.15));
    padding: 80px 0 60px;
}

.hero-page .hero-body {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
}

.hero-page .hero-sidecard {
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(8px);
    box-shadow: none;
    border: 1px solid rgba(255, 255, 255, 0.6);
}

.page-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 240px;
    position: relative;
}

.search-input input {
    width: 100%;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    font-size: 0.95rem;
}

.filter-tags {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.filter-tags button,
.filter-pill {
    border: 2px solid transparent;
    background: rgba(15, 23, 42, 0.08);
    padding: 10px 18px;
    border-radius: 999px;
    font-weight: 500;
    color: var(--color-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-tags button:hover,
.filter-pill:hover {
    background: rgba(178, 28, 38, 0.1);
    color: var(--color-primary);
    transform: translateY(-2px);
    border-color: rgba(178, 28, 38, 0.3);
}

.filter-tags button.active,
.filter-pill.active {
    background: linear-gradient(135deg, var(--color-secondary), #1a2332);
    color: white;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.2);
}

.filter-tags button.active:hover,
.filter-pill.active:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.3);
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.resource-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.resource-card .meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--color-muted);
}

.resource-card .tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.resource-card .tag-list span {
    background: rgba(178, 28, 38, 0.1);
    color: var(--color-primary);
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
}

.contract-samples {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 26px;
    margin-top: 32px;
}

.contract-sample {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-primary);
    padding: 26px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-smooth);
    position: relative;
}

.contract-sample:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-left-width: 6px;
    border-left-color: var(--color-primary);
}

.contract-sample h3 {
    margin-top: 0;
    margin-bottom: 16px;
}

.contract-meta {
    color: var(--color-muted);
    font-size: 0.85rem;
    margin-bottom: 16px;
}

.contract-body {
    display: grid;
    gap: 10px;
    color: var(--color-secondary);
    line-height: 1.7;
}

.contract-body strong {
    display: inline-block;
    margin-right: 6px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.data-table thead {
    background: linear-gradient(135deg, rgba(178, 28, 38, 0.1), rgba(178, 28, 38, 0.08));
    text-align: left;
}

.data-table th,
.data-table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
    font-size: 0.92rem;
    transition: background var(--transition-fast);
}

.data-table tbody tr {
    transition: all var(--transition-fast);
}

.data-table tbody tr:hover {
    background: rgba(178, 28, 38, 0.04);
    transform: scale(1.01);
}

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

.form-card {
    background: var(--color-surface);
    padding: 32px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 22px;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.form-field label {
    font-weight: 600;
}

.form-field input,
.form-field select,
.form-field textarea {
    padding: 12px 14px;
    border-radius: var(--radius-md);
    border: 2px solid var(--color-border);
    font-size: 0.95rem;
    resize: vertical;
    min-height: 46px;
    transition: all var(--transition-fast);
    background: var(--color-surface);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(178, 28, 38, 0.1);
    transform: translateY(-1px);
}
.form-field input:focus-visible,
.form-field select:focus-visible,
.form-field textarea:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.form-field input:hover,
.form-field select:hover,
.form-field textarea:hover {
    border-color: rgba(178, 28, 38, 0.4);
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.support-card {
    background: rgba(178, 28, 38, 0.08);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--transition-smooth);
    border: 1px solid transparent;
}

.support-card:hover {
    background: rgba(178, 28, 38, 0.12);
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(178, 28, 38, 0.2);
    border-color: rgba(178, 28, 38, 0.3);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.dashboard-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 14px;
    transition: all var(--transition-smooth);
    border: 1px solid transparent;
}

.dashboard-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(178, 28, 38, 0.15);
}

.dashboard-card .meta {
    color: var(--color-muted);
    font-size: 0.85rem;
}

.timeline {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 16px;
}

.timeline li {
    padding-left: 24px;
    position: relative;
}

.timeline li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 6px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-primary);
}

.empty-state {
    background: var(--color-surface-soft);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    color: var(--color-muted);
}

@media (max-width: 960px) {
    .hero-body {
        grid-template-columns: 1fr;
    }

    .hero-sidecard {
        order: -1;
    }

    .site-nav ul {
        flex-wrap: wrap;
        justify-content: flex-end;
    }

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

.iframe-container {
    position: relative;
    width: 100%;
    height: 800px;
    background: var(--color-surface);
    overflow: hidden;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    min-height: 600px;
}

.regulation-iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
    background: var(--color-surface);
}

/* 加载状态指示 */
.iframe-container::before {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 1;
    pointer-events: none;
}

@keyframes spin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.regulation-iframe[src] {
    position: relative;
    z-index: 2;
}

/* 数据库选项卡样式 */
.database-tabs {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--color-border);
}

.database-tab {
    padding: 14px 28px;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--color-muted);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    bottom: -2px;
}

.database-tab:hover {
    color: var(--color-primary);
    background: rgba(178, 28, 38, 0.05);
}

.database-tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.database-content {
    display: none;
}

.database-content.active {
    display: block;
}

/* 专业法律数据库嵌入查看区 */
.db-embed-viewer {
    margin-bottom: 32px;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.db-embed-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    padding: 16px 24px;
    background: var(--color-surface-soft);
    border-bottom: 1px solid var(--color-border);
}

.db-embed-title {
    font-weight: 600;
    color: var(--color-secondary);
    font-size: 1rem;
}

.db-embed-placeholder {
    padding: 48px 24px;
    text-align: center;
    color: var(--color-muted);
    background: var(--color-surface-soft);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.db-embed-placeholder p {
    margin: 0;
    font-size: 0.95rem;
}

.db-embed-iframe-wrap {
    border-radius: 0;
    min-height: 600px;
    height: 70vh;
}

.db-embed-iframe-wrap iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

.db-embed-viewer--active .db-embed-placeholder {
    display: none;
}

/* 专业法律数据库导航 */
.database-nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.database-nav-card {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.database-nav-card h3 {
    margin: 0;
    font-size: 1.1rem;
    line-height: 1.3;
}

.database-nav-card p {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.92rem;
    line-height: 1.6;
    flex: 1;
}

.database-nav-card .db-meta {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 500;
}

.database-nav-card .tag-free {
    display: inline-block;
    background: rgba(178, 28, 38, 0.15);
    color: var(--color-primary);
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 999px;
    font-weight: 600;
    margin-left: 4px;
}

.database-nav-card .card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

.database-nav-card .btn {
    text-decoration: none;
}

@media (max-width: 640px) {
    .database-nav-grid {
        grid-template-columns: 1fr;
    }
}

/* 国家选择器样式 */
.country-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 24px;
}

.country-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 20px 16px;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    color: var(--color-secondary);
}

.country-btn:hover {
    border-color: var(--color-primary);
    background: rgba(178, 28, 38, 0.05);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(178, 28, 38, 0.1);
}

.country-btn.active {
    border-color: var(--color-primary);
    background: rgba(178, 28, 38, 0.1);
    box-shadow: 0 4px 12px rgba(178, 28, 38, 0.2);
}

.country-flag {
    font-size: 2rem;
    line-height: 1;
}

.country-name {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-secondary);
}

.country-btn.active .country-name {
    color: var(--color-primary);
}

/* 嵌入界面关闭按钮样式 */
.iframe-close-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(178, 28, 38, 0.1);
    color: var(--color-primary);
    border: 1px solid rgba(178, 28, 38, 0.3);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.iframe-close-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(178, 28, 38, 0.25);
}

.iframe-close-btn::before {
    content: "×";
    font-size: 1.2rem;
    font-weight: bold;
    line-height: 1;
}

/* 可关闭的 iframe 容器包装器 */
.iframe-wrapper {
    position: relative;
}

.iframe-wrapper.collapsed .iframe-container {
    display: none;
}

.iframe-wrapper.collapsed .iframe-collapsed-placeholder {
    display: flex;
}

.iframe-collapsed-placeholder {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 48px 24px;
    background: var(--color-surface-soft);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    text-align: center;
    min-height: 200px;
}

.iframe-collapsed-placeholder p {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.95rem;
}

.iframe-reopen-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 999px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-smooth);
    box-shadow: 0 4px 12px rgba(178, 28, 38, 0.25);
}

.iframe-reopen-btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(178, 28, 38, 0.35);
}

@media (max-width: 960px) {
    .iframe-container {
        height: 600px;
    }

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

@media (max-width: 768px) {
    .header-top-inner {
        flex-wrap: wrap;
    }

    .header-slogan {
        width: 100%;
        order: 1;
    }

    .header-top-right {
        order: 2;
    }

    .header-search-input {
        width: 100px;
    }
}

@media (max-width: 640px) {
    .header-slogan {
        display: none;
    }

    .header-search-input {
        width: 80px;
    }

    .nav-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .brand {
        min-width: 0;
    }

    .brand-mark {
        width: 56px;
        height: 56px;
        flex-shrink: 0;
    }

    .brand-copy {
        min-width: 0;
        overflow: hidden;
    }

    .brand-copy h1 {
        font-size: 1rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .brand-copy p {
        font-size: 0.85rem;
    }

    .site-nav {
        width: 100%;
        min-width: 0;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 4px;
    }

    .site-nav ul {
        width: max-content;
        min-width: 100%;
        justify-content: flex-start;
        gap: 8px;
        padding: 4px 0;
    }

    .site-nav a {
        font-size: 0.875rem;
        padding: 10px 14px;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .hero {
        padding: 56px 0;
    }

    .hero-actions {
        width: 100%;
    }

    .hero-actions .btn {
        flex: 1 1 auto;
        justify-content: center;
    }

    .card,
    .split-card,
    .form-card {
        padding: 22px;
    }

    .iframe-container {
        height: 500px;
    }

    .database-tabs {
        flex-direction: column;
        gap: 0;
    }

    .database-tab {
        width: 100%;
        text-align: center;
        border-bottom: 2px solid var(--color-border);
        border-left: none;
        border-right: none;
        border-top: none;
        padding: 16px;
    }

    .database-tab.active {
        border-bottom-color: var(--color-primary);
    }

    .country-selector {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .country-btn {
        padding: 16px 12px;
    }

    .country-flag {
        font-size: 1.5rem;
    }

    .country-name {
        font-size: 0.85rem;
    }
}

/* ========== 移动端适配：手机端布局适应屏幕，电脑端不受影响 ========== */
@media (max-width: 768px) {
    .section {
        padding-top: 36px;
        padding-bottom: 36px;
    }
    .section-header {
        margin-bottom: 28px;
    }
    .section-header h2 {
        font-size: 1.5rem;
    }
    .page-toolbar {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    .search-input {
        min-width: 0;
        width: 100%;
    }
    .filter-tags {
        justify-content: flex-start;
    }
    .filter-tags button {
        padding: 8px 14px;
        font-size: 0.88rem;
    }
    .table-wrapper {
        -webkit-overflow-scrolling: touch;
        overflow-x: auto;
    }
    .data-table th,
    .data-table td {
        padding: 12px 14px;
        font-size: 0.85rem;
    }
    .data-table .actions {
        white-space: nowrap;
    }
    .form-grid {
        grid-template-columns: 1fr;
    }
    .form-card,
    .card {
        padding: 20px;
    }
    .card-grid.three-col {
        grid-template-columns: 1fr;
    }
    .database-tabs-wrap {
        padding: 6px;
    }
    .database-tabs-wrap .database-tab {
        padding: 12px 16px;
        font-size: 0.95rem;
    }
    .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    .footer-links {
        flex-wrap: wrap;
    }
}

@media (max-width: 640px) {
    .container {
        padding-left: 16px;
        padding-right: 16px;
    }
    main,
    .section {
        min-width: 0;
    }
    .card,
    .form-card,
    .split-card,
    .hero-text,
    .section-header {
        overflow-wrap: break-word;
        word-break: break-word;
    }
    .hero-text h2 {
        font-size: 1.5rem;
    }
    .hero-text p {
        max-width: 100%;
    }
    .hero-sidecard {
        padding: 20px;
    }
    .hero-sidecard h3 {
        font-size: 1.1rem;
    }
    .hero-metrics li {
        min-width: 0;
        padding: 12px 16px;
    }
    .hero-metrics strong {
        font-size: 1.15rem;
    }
    .support-grid {
        grid-template-columns: 1fr;
    }
    .regulation-primary-card {
        padding: 24px 20px 28px;
        margin-left: -16px;
        margin-right: -16px;
        border-radius: 0;
        border-left: none;
        border-right: none;
    }
    .regulation-primary-card::before {
        border-radius: 0;
    }
    .regulation-primary-card .section-header h2 {
        font-size: 1.35rem;
    }
    .db-block-label {
        font-size: 0.75rem;
        padding: 4px 8px;
    }
    .iframe-container {
        height: 400px;
        min-height: 360px;
    }
    .db-embed-iframe-wrap {
        min-height: 400px;
        height: 60vh;
    }
}

@media (max-width: 480px) {
    .container {
        padding-left: 12px;
        padding-right: 12px;
    }
    .nav-bar {
        gap: 12px;
    }
    .site-nav a {
        font-size: 0.8125rem;
        padding: 10px 12px;
    }
    .hero {
        padding: 40px 0;
    }
    .hero-actions {
        flex-direction: column;
    }
    .hero-actions .btn {
        width: 100%;
        min-height: 44px;
        justify-content: center;
    }
    .section-header h2 {
        font-size: 1.35rem;
    }
    .data-table th,
    .data-table td {
        padding: 10px 12px;
        font-size: 0.8rem;
    }
    .database-nav-card .card-actions {
        flex-direction: column;
    }
    .database-nav-card .card-actions .btn {
        width: 100%;
        text-align: center;
    }
    .btn {
        min-height: 44px;
        padding: 12px 20px;
    }
}

/* 超小屏手机（如 320px~360px） */
@media (max-width: 360px) {
    .container {
        padding-left: 10px;
        padding-right: 10px;
    }
    .brand-copy h1 {
        font-size: 0.9rem;
    }
    .hero-text h2 {
        font-size: 1.25rem;
    }
    .section-header h2 {
        font-size: 1.2rem;
    }
    .card,
    .form-card,
    .split-card {
        padding: 16px;
    }
}

/* 防止固定宽元素撑破视口 */
img,
iframe,
video,
embed,
object {
    max-width: 100%;
}
.iframe-container iframe {
    max-width: 100%;
}