/* roulang page: index */
:root {
    --bg: #0A182F;
    --bg-panel: #0F2440;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(0, 217, 255, 0.06);
    --accent: #00D9FF;
    --amber: #FFB347;
    --text: #E6F1FF;
    --text-2: #94A9C9;
    --text-3: #5B7395;
    --border: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(0, 217, 255, 0.25);
    --success: #2ed573;
    --danger: #ff6b6b;
    --radius: 16px;
    --radius-btn: 999px;
    --radius-input: 12px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
    background-color: var(--bg);
    background-image: radial-gradient(ellipse at 20% 20%, rgba(0, 217, 255, 0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(255, 179, 71, 0.03) 0%, transparent 40%),
        linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
    background-size: 100% 100%, 100% 100%, 48px 48px, 48px 48px;
    color: var(--text);
    font-size: 16px;
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

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

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

a:hover {
    color: #4ce3ff;
}

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

input,
textarea {
    font-family: inherit;
    font-size: 15px;
}

ul,
ol {
    list-style: none;
}

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

.section-padding {
    padding: 96px 0;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 600;
    padding: 12px 28px;
    line-height: 1.4;
    transition: var(--transition);
    position: relative;
    border: 1px solid transparent;
    letter-spacing: 0.02em;
}

.btn-cyan {
    background: var(--accent);
    color: #0A182F;
    box-shadow: 0 4px 20px rgba(0, 217, 255, 0.2);
}

.btn-cyan:hover {
    background: #33e2ff;
    color: #0A182F;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 217, 255, 0.35);
}

.btn-cyan:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    box-shadow: 0 0 0 4px rgba(0, 217, 255, 0.2);
}

.btn-amber {
    background: var(--amber);
    color: #1A2333;
    box-shadow: 0 4px 20px rgba(255, 179, 71, 0.2);
}

.btn-amber:hover {
    background: #ffc06a;
    color: #1A2333;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(255, 179, 71, 0.35);
}

.btn-amber:focus-visible {
    outline: 2px solid var(--amber);
    outline-offset: 3px;
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.25);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.btn-block {
    width: 100%;
}

/* 标签徽章 */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    line-height: 1.5;
    white-space: nowrap;
    background: rgba(0, 217, 255, 0.08);
    color: var(--accent);
    border: 1px solid rgba(0, 217, 255, 0.18);
}

.badge-amber {
    background: rgba(255, 179, 71, 0.08);
    color: var(--amber);
    border-color: rgba(255, 179, 71, 0.2);
}

.badge-plain {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-2);
    border-color: rgba(255, 255, 255, 0.1);
}

/* 标题 */
.section-header {
    margin-bottom: 48px;
    max-width: 680px;
}

.section-header.center {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: -0.01em;
    margin-bottom: 14px;
}

.section-header p {
    font-size: 16px;
    color: var(--text-2);
    line-height: 1.75;
}

.section-header .section-tag {
    display: inline-block;
    margin-bottom: 16px;
}

/* 导航 */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 24, 47, 0.85);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: background 0.3s, box-shadow 0.3s;
}

.site-header.scrolled {
    background: rgba(10, 24, 47, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.35);
}

.nav-container {
    display: flex;
    align-items: center;
    height: 72px;
    gap: 32px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    color: var(--text);
}

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

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: rgba(0, 217, 255, 0.08);
    border: 1px solid rgba(0, 217, 255, 0.15);
}

.logo-text {
    font-size: 19px;
    font-weight: 700;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.logo-text .logo-short {
    font-weight: 400;
    color: var(--text-2);
    font-size: 15px;
}

.main-nav {
    margin-left: auto;
}

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

.main-nav a {
    display: inline-flex;
    align-items: center;
    padding: 9px 18px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-2);
    transition: var(--transition);
    position: relative;
    white-space: nowrap;
}

.main-nav a:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.04);
}

.main-nav a.active {
    color: var(--accent);
    background: rgba(0, 217, 255, 0.08);
}

.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 18px;
    right: 18px;
    height: 2px;
    border-radius: 2px;
    background: var(--accent);
    box-shadow: 0 0 8px rgba(0, 217, 255, 0.6);
}

.nav-cta {
    margin-left: 8px;
    padding: 10px 24px;
    font-size: 14px;
    flex-shrink: 0;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    margin-left: auto;
    flex-shrink: 0;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 1px;
    transition: var(--transition);
}

.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);
}

/* Hero */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 140px 0 100px;
    background-image: linear-gradient(135deg, rgba(10, 24, 47, 0.9) 0%, rgba(10, 24, 47, 0.75) 60%, rgba(15, 36, 64, 0.65) 100%),
        url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    right: -120px;
    top: 20%;
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 217, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.hero-content {
    max-width: 780px;
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.01em;
    margin-bottom: 20px;
    color: var(--text);
}

.hero h1 .highlight {
    color: var(--accent);
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-2);
    margin-bottom: 10px;
    max-width: 640px;
}

.hero-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-2);
    margin-bottom: 36px;
    max-width: 620px;
}

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

/* 指标看板 */
.stats-panel {
    position: relative;
    z-index: 3;
    margin-top: -80px;
    background: rgba(15, 36, 64, 0.9);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: 20px;
    box-shadow: var(--shadow);
    padding: 32px 40px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.stat-item {
    text-align: center;
    padding: 8px 0;
}

.stat-value {
    font-size: 44px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--amber);
    font-feature-settings: "tnum";
}

.stat-unit {
    font-size: 18px;
    color: var(--amber);
    margin-left: 4px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-2);
    margin-top: 6px;
}

.stat-source {
    font-size: 12px;
    color: var(--text-3);
    margin-top: 4px;
}

/* 服务矩阵 */
.services-section {
    padding-top: 100px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 24px;
}

.service-card {
    position: relative;
    border-radius: var(--radius);
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 32px;
    transition: var(--transition);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
    box-shadow: var(--shadow);
}

.service-card.large {
    grid-column: span 3;
    min-height: 260px;
}

.service-card.small {
    grid-column: span 2;
    min-height: 220px;
}

.service-card .service-bg {
    position: absolute;
    right: -40px;
    bottom: -40px;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 217, 255, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.service-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 217, 255, 0.08);
    border: 1px solid rgba(0, 217, 255, 0.16);
    margin-bottom: 18px;
    color: var(--accent);
    flex-shrink: 0;
}

.service-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    line-height: 1.4;
}

.service-card p {
    font-size: 14.5px;
    color: var(--text-2);
    line-height: 1.7;
    margin-bottom: 18px;
    flex: 1;
}

.service-card .service-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 18px;
}

.service-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    font-weight: 500;
    color: var(--accent);
    margin-top: auto;
}

.service-link:hover {
    color: #4ce3ff;
}

.service-link .arrow {
    transition: transform 0.3s;
}

.service-link:hover .arrow {
    transform: translateX(4px);
}

/* 结果对比 */
.compare-section {
    position: relative;
    padding: 96px 0;
    background: rgba(15, 36, 64, 0.35);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.compare-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.compare-visual {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    min-height: 400px;
}

.compare-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s;
}

.compare-visual:hover img {
    transform: scale(1.02);
}

.compare-visual::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(0deg, rgba(10, 24, 47, 0.6) 0%, transparent 50%);
}

.compare-table-wrap {
    background: rgba(15, 36, 64, 0.6);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
}

.compare-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    padding: 16px 20px;
    font-size: 14.5px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    transition: var(--transition);
}

.compare-row:last-child {
    border-bottom: none;
}

.compare-row:hover {
    background: rgba(255, 255, 255, 0.02);
}

.compare-row.header {
    background: rgba(0, 217, 255, 0.06);
    font-weight: 600;
    font-size: 14px;
    color: var(--text);
}

.compare-dim {
    color: var(--text-2);
    font-weight: 500;
}

.compare-old {
    color: var(--text-3);
}

.compare-new {
    color: var(--accent);
    font-weight: 500;
}

.compare-note {
    margin-top: 24px;
    padding: 16px 20px;
    background: rgba(255, 179, 71, 0.06);
    border-left: 3px solid var(--amber);
    border-radius: 0 12px 12px 0;
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.7;
}

/* 最新动态 */
.news-section {
    padding: 96px 0;
}

.news-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.news-feature {
    display: flex;
    flex-direction: column;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: var(--transition);
    text-decoration: none;
    color: var(--text);
}

.news-feature:hover {
    transform: translateY(-4px);
    border-color: var(--border-accent);
    box-shadow: var(--shadow);
    color: var(--text);
}

.news-feature-image {
    position: relative;
    height: 220px;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(15, 36, 64, 0.8), rgba(10, 24, 47, 0.9));
}

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

.news-feature-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(10, 24, 47, 0.6));
}

.news-feature-body {
    padding: 28px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 14px;
}

.news-date {
    font-size: 13px;
    color: var(--text-3);
    white-space: nowrap;
}

.news-feature-body h3 {
    font-size: 22px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-feature-body p {
    font-size: 14.5px;
    color: var(--text-2);
    line-height: 1.75;
    margin-bottom: 18px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--accent);
}

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

.news-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: var(--transition);
    text-decoration: none;
    color: var(--text);
}

.news-row:hover {
    border-color: var(--border-accent);
    background: var(--bg-card-hover);
    transform: translateX(4px);
    color: var(--text);
}

.news-row-info {
    flex: 1;
    min-width: 0;
}

.news-row-info h4 {
    font-size: 16px;
    font-weight: 500;
    line-height: 1.5;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.news-row-info p {
    font-size: 13.5px;
    color: var(--text-3);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-row-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 6px;
    flex-shrink: 0;
}

.news-row-meta .news-date {
    font-size: 12.5px;
}

.empty-state {
    grid-column: 1 / -1;
    border: 2px dashed rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    padding: 60px 24px;
    text-align: center;
    color: var(--text-2);
    font-size: 15px;
    background: rgba(255, 255, 255, 0.01);
}

/* FAQ */
.faq-section {
    padding: 96px 0;
    background: rgba(15, 36, 64, 0.25);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.faq-wrap {
    background: rgba(10, 24, 47, 0.6);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 16px 32px;
    box-shadow: var(--shadow);
}

.faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

.faq-question {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 24px 0;
    text-align: left;
    font-size: 16px;
    font-weight: 500;
    color: var(--text);
    gap: 16px;
    transition: color 0.3s;
    background: none;
    border: none;
    cursor: pointer;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-question:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 8px;
}

.faq-icon {
    margin-left: auto;
    width: 28px;
    height: 28px;
    min-width: 28px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    font-size: 18px;
    line-height: 1;
    color: var(--text-2);
    position: relative;
}

.faq-icon::before,
.faq-icon::after {
    content: '';
    position: absolute;
    background: currentColor;
    border-radius: 1px;
}

.faq-icon::before {
    width: 12px;
    height: 2px;
}

.faq-icon::after {
    width: 2px;
    height: 12px;
    transition: transform 0.3s;
}

.faq-item.active .faq-icon {
    color: var(--amber);
    background: rgba(255, 179, 71, 0.1);
}

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

.faq-item.active .faq-question {
    color: var(--accent);
}

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

.faq-answer-inner {
    padding: 0 0 22px;
    color: var(--text-2);
    font-size: 15px;
    line-height: 1.8;
    max-width: 720px;
}

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

/* 转化表单 */
.contact-section {
    position: relative;
    padding: 96px 0;
    overflow: hidden;
    background-image: linear-gradient(rgba(10, 24, 47, 0.85), rgba(10, 24, 47, 0.9)),
        url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
}

.contact-section::before {
    content: '';
    position: absolute;
    left: -80px;
    bottom: -80px;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 179, 71, 0.06) 0%, transparent 70%);
    pointer-events: none;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    position: relative;
    z-index: 2;
}

.contact-info h2 {
    font-size: 36px;
    line-height: 1.3;
    margin-bottom: 16px;
}

.contact-info>p {
    color: var(--text-2);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 36px;
    max-width: 460px;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-item-icon {
    width: 40px;
    height: 40px;
    min-width: 40px;
    border-radius: 10px;
    background: rgba(0, 217, 255, 0.08);
    border: 1px solid rgba(0, 217, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
}

.contact-item h4 {
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.6;
}

.form-card {
    background: rgba(15, 36, 64, 0.75);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
}

.form-card h3 {
    font-size: 24px;
    margin-bottom: 6px;
}

.form-card .form-tip {
    font-size: 14px;
    color: var(--text-3);
    margin-bottom: 32px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    height: 48px;
    border-radius: var(--radius-input);
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
    padding: 0 16px;
    transition: var(--transition);
    font-size: 15px;
}

.form-group textarea {
    height: auto;
    padding: 14px 16px;
    resize: vertical;
    min-height: 120px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-3);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.15);
    background: rgba(255, 255, 255, 0.05);
}

.submit-btn {
    position: relative;
    width: 100%;
    height: 52px;
    border-radius: var(--radius-btn);
    background: var(--amber);
    color: #1A2333;
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.submit-btn:hover {
    background: #ffc06a;
    box-shadow: 0 8px 30px rgba(255, 179, 71, 0.4);
    transform: translateY(-2px);
}

.submit-btn:focus-visible {
    outline: 2px solid var(--amber);
    outline-offset: 3px;
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.submit-btn .btn-state {
    display: none;
}

.submit-btn.loading .btn-state.loading {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.submit-btn.success .btn-state.success {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.submit-btn.loading .btn-text,
.submit-btn.success .btn-text {
    display: none;
}

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(26, 35, 51, 0.3);
    border-top-color: #1A2333;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.check-icon {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--success);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    flex-shrink: 0;
}

.privacy-note {
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-3);
    text-align: center;
    line-height: 1.6;
}

/* 页脚 */
.site-footer {
    background: #081324;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 72px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 56px;
}

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

.footer-brand-desc {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.75;
    margin-bottom: 20px;
    max-width: 320px;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text);
}

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

.footer-column a {
    font-size: 14px;
    color: var(--text-2);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.footer-column a:hover {
    color: var(--accent);
    transform: translateX(4px);
}

.footer-contact li {
    font-size: 14px;
    color: var(--text-2);
    margin-bottom: 12px;
    display: flex;
    gap: 10px;
    align-items: flex-start;
    line-height: 1.6;
}

.footer-contact li span {
    color: var(--text-3);
    min-width: 40px;
    flex-shrink: 0;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 13px;
    color: var(--text-3);
}

.footer-bottom a {
    color: var(--text-3);
    font-size: 13px;
}

.footer-bottom a:hover {
    color: var(--accent);
}

/* 响应式 */
@media (max-width: 1024px) {
    .nav-container {
        gap: 20px;
    }

    .nav-cta {
        display: none;
    }

    .hero {
        min-height: 80vh;
        padding: 120px 0 80px;
    }

    .hero h1 {
        font-size: 42px;
    }

    .stats-panel {
        padding: 28px 24px;
        gap: 20px;
    }

    .stat-value {
        font-size: 36px;
    }

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

    .service-card.large,
    .service-card.small {
        grid-column: auto;
    }

    .compare-wrapper {
        grid-template-columns: 1fr;
    }

    .compare-visual {
        min-height: 300px;
    }

    .news-layout {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }

    .section-padding {
        padding: 64px 0;
    }

    .site-header {
        height: 64px;
    }

    .nav-container {
        height: 64px;
    }

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

    .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: rgba(10, 24, 47, 0.97);
        -webkit-backdrop-filter: blur(20px);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
        padding: 16px 20px 24px;
        transform: translateY(-120%);
        opacity: 0;
        transition: transform 0.35s ease, opacity 0.3s ease;
        pointer-events: none;
        box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    }

    .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }

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

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

    .nav-toggle {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding: 120px 0 80px;
    }

    .hero h1 {
        font-size: 34px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

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

    .hero-actions .btn {
        width: 100%;
        margin-bottom: 8px;
    }

    .stats-panel {
        grid-template-columns: repeat(2, 1fr);
        margin-top: -40px;
        padding: 24px 16px;
        gap: 16px;
    }

    .stat-value {
        font-size: 32px;
    }

    .section-header h2 {
        font-size: 28px;
    }

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

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

    .service-card.large,
    .service-card.small {
        min-height: auto;
    }

    .compare-section {
        padding: 64px 0;
    }

    .compare-visual {
        min-height: 220px;
    }

    .compare-table-wrap {
        overflow-x: auto;
    }

    .compare-row {
        grid-template-columns: 1fr 1fr 1fr;
        min-width: 480px;
    }

    .news-section {
        padding: 64px 0;
    }

    .news-feature-body {
        padding: 20px;
    }

    .news-feature-body h3 {
        font-size: 19px;
    }

    .news-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 16px 18px;
    }

    .news-row-meta {
        flex-direction: row;
        align-items: center;
        gap: 12px;
    }

    .faq-section {
        padding: 64px 0;
    }

    .faq-wrap {
        padding: 12px 20px;
    }

    .faq-question {
        font-size: 15px;
        padding: 20px 0;
    }

    .contact-section {
        padding: 64px 0;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .form-card {
        padding: 28px 20px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 36px;
        padding-bottom: 40px;
    }

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

@media (max-width: 520px) {
    .hero h1 {
        font-size: 29px;
    }

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

    .stats-panel {
        gap: 12px;
        padding: 20px 12px;
    }

    .stat-value {
        font-size: 26px;
    }

    .stat-label {
        font-size: 13px;
    }

    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }

    .form-group input {
        height: 44px;
    }

    .faq-wrap {
        padding: 8px 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* roulang page: category1 */
:root {
            --bg-primary: #0A182F;
            --bg-panel: #0F2440;
            --bg-card: rgba(255, 255, 255, 0.04);
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-cyan: rgba(0, 217, 255, 0.35);
            --accent-cyan: #00D9FF;
            --accent-amber: #FFB347;
            --accent-green: #2ECC71;
            --text-primary: #E6F1FF;
            --text-secondary: #94A9C9;
            --text-muted: #5B7395;
            --text-dark: #1A2333;
            --radius-card: 16px;
            --radius-btn: 999px;
            --radius-input: 12px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.25);
            --shadow-cyan: 0 0 24px rgba(0, 217, 255, 0.25);
            --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            --max-width: 1200px;
            --space-section: 88px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-cn);
            background-color: var(--bg-primary);
            background-image: radial-gradient(ellipse at 20% 20%, rgba(0, 217, 255, 0.05) 0%, transparent 50%), radial-gradient(ellipse at 80% 70%, rgba(255, 179, 71, 0.03) 0%, transparent 50%);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        body::before {
            content: "";
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
            z-index: 0;
        }

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

        a:hover {
            color: #66e6ff;
        }

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s ease;
            border: none;
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-cyan {
            background: var(--accent-cyan);
            color: var(--text-dark);
        }

        .btn-cyan:hover {
            background: #33e0ff;
            color: var(--text-dark);
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 217, 255, 0.35);
        }

        .btn-cyan:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            box-shadow: 0 0 0 4px rgba(0, 217, 255, 0.2);
        }

        .btn-amber {
            background: var(--accent-amber);
            color: var(--text-dark);
        }

        .btn-amber:hover {
            background: #ffc56e;
            color: var(--text-dark);
            transform: translateY(-2px);
            box-shadow: 0 0 28px rgba(255, 179, 71, 0.35);
        }

        .btn-amber:focus-visible {
            outline: 2px solid var(--accent-amber);
            outline-offset: 3px;
            box-shadow: 0 0 0 4px rgba(255, 179, 71, 0.2);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.25);
        }

        .btn-outline:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-2px);
            box-shadow: 0 0 20px rgba(0, 217, 255, 0.15);
        }

        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: var(--radius-btn);
            font-size: 12px;
            font-weight: 500;
            background: rgba(0, 217, 255, 0.1);
            color: var(--accent-cyan);
            border: 1px solid rgba(0, 217, 255, 0.2);
            letter-spacing: 0.5px;
        }

        .badge-amber {
            background: rgba(255, 179, 71, 0.1);
            color: var(--accent-amber);
            border-color: rgba(255, 179, 71, 0.25);
        }

        .section {
            padding: var(--space-section) 0;
            position: relative;
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-title {
            font-size: 34px;
            font-weight: 600;
            line-height: 1.35;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .divider {
            width: 64px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-amber));
            border-radius: 2px;
            margin: 0 auto 20px;
        }

        /* ========== Header ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 24, 47, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background 0.3s, box-shadow 0.3s;
        }

        .site-header.scrolled {
            background: rgba(10, 24, 47, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

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

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: rgba(0, 217, 255, 0.08);
            border-radius: 10px;
            border: 1px solid rgba(0, 217, 255, 0.2);
        }

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

        .logo-short {
            font-size: 13px;
            font-weight: 400;
            color: var(--text-muted);
            margin-left: 2px;
        }

        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 6px;
        }

        .main-nav a {
            display: block;
            padding: 10px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            border-radius: 10px;
            transition: color 0.2s, background 0.2s;
            position: relative;
        }

        .main-nav a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.03);
        }

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

        .main-nav a.active::after {
            content: "";
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 22px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 12px rgba(0, 217, 255, 0.6);
        }

        .nav-cta {
            padding: 9px 22px;
            font-size: 14px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: transparent;
            cursor: pointer;
            padding: 10px;
            border-radius: 8px;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: transform 0.3s, opacity 0.3s;
        }

        .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);
        }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            padding: 180px 0 120px;
            background: linear-gradient(135deg, rgba(10, 24, 47, 0.92) 0%, rgba(10, 24, 47, 0.85) 60%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: "";
            position: absolute;
            top: -100px;
            right: -100px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 217, 255, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero::after {
            content: "";
            position: absolute;
            bottom: -80px;
            left: 30%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 179, 71, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

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

        .breadcrumb a {
            color: var(--text-secondary);
        }

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

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

        .breadcrumb .current {
            color: var(--accent-cyan);
        }

        .hero-content {
            max-width: 780px;
            position: relative;
            z-index: 2;
        }

        .hero-title {
            font-size: 46px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -1px;
            margin-bottom: 24px;
        }

        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), #66e6ff);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-subtitle {
            font-size: 17px;
            line-height: 1.85;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 640px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }

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

        /* ========== Stats ========== */
        .stats-section {
            padding: 0 0 72px;
            margin-top: -40px;
            position: relative;
            z-index: 3;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .stat-item {
            padding: 32px 24px;
            text-align: center;
            border-right: 1px solid rgba(255, 255, 255, 0.05);
            position: relative;
        }

        .stat-item:last-child {
            border-right: none;
        }

        .stat-number {
            font-size: 42px;
            font-weight: 700;
            color: var(--accent-amber);
            line-height: 1.2;
            margin-bottom: 6px;
            letter-spacing: -1px;
        }

        .stat-number i {
            font-style: normal;
            font-size: 22px;
            margin-left: 2px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 4px;
        }

        .stat-note {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ========== Services ========== */
        .services {
            background: rgba(15, 36, 64, 0.2);
        }

        .service-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 20px;
        }

        .service-card {
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
            overflow: hidden;
        }

        .service-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
            opacity: 0;
            transition: opacity 0.25s;
        }

        .service-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-cyan);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35), 0 0 20px rgba(0, 217, 255, 0.08);
        }

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

        .service-card-lg {
            grid-column: span 7;
        }

        .service-card-sm {
            grid-column: span 5;
        }

        .service-card-6 {
            grid-column: span 6;
        }

        .service-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 217, 255, 0.1);
            border: 1px solid rgba(0, 217, 255, 0.2);
            margin-bottom: 18px;
        }

        .service-icon svg {
            width: 24px;
            height: 24px;
            stroke: var(--accent-cyan);
            fill: none;
            stroke-width: 1.6;
        }

        .service-icon.amber {
            background: rgba(255, 179, 71, 0.1);
            border-color: rgba(255, 179, 71, 0.25);
        }

        .service-icon.amber svg {
            stroke: var(--accent-amber);
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 14px;
        }

        .service-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.2s;
        }

        .service-link:hover {
            gap: 8px;
        }

        /* ========== Advantages ========== */
        .advantage-row {
            display: flex;
            align-items: center;
            gap: 64px;
            margin-bottom: 72px;
        }

        .advantage-row:last-child {
            margin-bottom: 0;
        }

        .advantage-row.reverse {
            flex-direction: row-reverse;
        }

        .advantage-media {
            flex: 1;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-card);
            position: relative;
            min-height: 280px;
            background: var(--bg-panel);
        }

        .advantage-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 280px;
        }

        .advantage-media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 24, 47, 0.5) 0%, transparent 50%);
            pointer-events: none;
        }

        .advantage-content {
            flex: 1;
        }

        .advantage-content .badge {
            margin-bottom: 14px;
        }

        .advantage-content h3 {
            font-size: 26px;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 14px;
        }

        .advantage-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 16px;
        }

        .advantage-list {
            list-style: none;
            padding: 0;
        }

        .advantage-list li {
            font-size: 14px;
            color: var(--text-secondary);
            padding: 6px 0;
            padding-left: 22px;
            position: relative;
        }

        .advantage-list li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 8px;
            height: 8px;
            background: var(--accent-cyan);
            border-radius: 50%;
            box-shadow: 0 0 8px rgba(0, 217, 255, 0.4);
        }

        /* ========== Scenarios ========== */
        .scenarios {
            background: rgba(15, 36, 64, 0.15);
        }

        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .scenario-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 28px 26px;
            transition: all 0.25s;
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }

        .scenario-card:hover {
            border-color: var(--border-cyan);
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
        }

        .scenario-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 179, 71, 0.08);
            border: 1px solid rgba(255, 179, 71, 0.2);
        }

        .scenario-icon svg {
            width: 22px;
            height: 22px;
            stroke: var(--accent-amber);
            fill: none;
            stroke-width: 1.6;
        }

        .scenario-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .scenario-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ========== Process ========== */
        .process-wrap {
            display: flex;
            gap: 48px;
            align-items: flex-start;
        }

        .process-sidebar {
            width: 280px;
            flex-shrink: 0;
            position: sticky;
            top: 100px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 28px 24px;
        }

        .process-sidebar h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .process-sidebar p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .process-steps {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .process-step {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 26px;
            transition: border-color 0.25s, transform 0.25s;
        }

        .process-step:hover {
            border-color: var(--border-cyan);
            transform: translateX(4px);
        }

        .step-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(0, 217, 255, 0.1);
            border: 1px solid rgba(0, 217, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: var(--accent-cyan);
        }

        .step-content h4 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .step-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* ========== FAQ ========== */
        .faq-wrap {
            max-width: 860px;
            margin: 0 auto;
            background: var(--bg-card);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            padding: 32px;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }

        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 4px;
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
            font-size: 16px;
            font-weight: 500;
            transition: color 0.2s;
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-question:focus-visible {
            color: var(--accent-cyan);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s, background 0.3s, border-color 0.3s;
        }

        .faq-icon::before {
            content: "+";
            font-size: 18px;
            color: var(--text-secondary);
            transition: color 0.3s;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: rgba(255, 179, 71, 0.1);
            border-color: var(--accent-amber);
        }

        .faq-item.active .faq-icon::before {
            color: var(--accent-amber);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 4px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 20px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.85;
            background: rgba(0, 0, 0, 0.15);
            padding: 16px 20px;
            border-radius: 12px;
        }

        /* ========== Contact ========== */
        .contact {
            background: rgba(15, 36, 64, 0.2);
            position: relative;
            overflow: hidden;
        }

        .contact::before {
            content: "";
            position: absolute;
            top: -80px;
            left: -80px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0, 217, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
        }

        .contact-wrap {
            display: flex;
            gap: 64px;
            align-items: flex-start;
        }

        .contact-info {
            flex: 1;
        }

        .contact-info h2 {
            font-size: 34px;
            font-weight: 600;
            line-height: 1.35;
            margin-bottom: 16px;
        }

        .contact-info p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 24px;
        }

        .contact-meta {
            list-style: none;
            padding: 0;
            margin-top: 24px;
        }

        .contact-meta li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            font-size: 15px;
            color: var(--text-secondary);
        }

        .contact-meta li span {
            color: var(--text-muted);
            width: 42px;
            flex-shrink: 0;
            font-size: 14px;
        }

        .contact-form-card {
            width: 440px;
            flex-shrink: 0;
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: var(--radius-card);
            padding: 36px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .form-group label .required {
            color: var(--accent-amber);
            margin-left: 2px;
        }

        .input-field {
            width: 100%;
            height: 46px;
            padding: 0 16px;
            background: rgba(10, 24, 47, 0.5);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-input);
            color: var(--text-primary);
            font-size: 14px;
            transition: border-color 0.25s, box-shadow 0.25s;
        }

        .input-field::placeholder {
            color: var(--text-muted);
        }

        .input-field:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.15);
            outline: none;
        }

        textarea.input-field {
            height: auto;
            min-height: 100px;
            padding: 14px 16px;
            resize: vertical;
        }

        .submit-btn {
            width: 100%;
            height: 48px;
            border-radius: var(--radius-btn);
            background: var(--accent-amber);
            color: var(--text-dark);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.25s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }

        .submit-btn:hover {
            background: #ffc56e;
            box-shadow: 0 0 24px rgba(255, 179, 71, 0.3);
            transform: translateY(-2px);
        }

        .submit-btn.loading {
            opacity: 0.75;
            cursor: progress;
            transform: translateY(0);
            box-shadow: none;
        }

        .submit-btn.success {
            background: var(--accent-green);
            color: #fff;
        }

        .spinner {
            width: 18px;
            height: 18px;
            border: 2px solid rgba(0, 0, 0, 0.2);
            border-top-color: var(--text-dark);
            border-radius: 50%;
            animation: spin 0.7s linear infinite;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        .form-note {
            font-size: 12px;
            color: var(--text-muted);
            text-align: center;
            margin-top: 14px;
            line-height: 1.6;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: rgba(8, 18, 36, 0.95);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 64px 0 24px;
            position: relative;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 48px;
        }

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

        .footer-brand-desc {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.85;
            max-width: 340px;
        }

        .footer-column h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 18px;
        }

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

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

        .footer-column ul a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.2s, padding-left 0.2s;
        }

        .footer-column ul a:hover {
            color: var(--accent-cyan);
            padding-left: 4px;
        }

        .footer-contact li {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            gap: 8px;
            margin-bottom: 10px;
        }

        .footer-contact li span {
            color: var(--text-muted);
            flex-shrink: 0;
            width: 32px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .service-card-lg {
                grid-column: span 12;
            }
            .service-card-sm {
                grid-column: span 6;
            }
            .service-card-6 {
                grid-column: span 12;
            }
            .advantage-row {
                flex-direction: column;
                gap: 32px;
            }
            .advantage-row.reverse {
                flex-direction: column;
            }
            .process-wrap {
                flex-direction: column;
            }
            .process-sidebar {
                width: 100%;
                position: static;
            }
            .contact-wrap {
                flex-direction: column;
            }
            .contact-form-card {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: 72px;
                right: -100%;
                width: 280px;
                height: calc(100vh - 72px);
                background: rgba(8, 18, 36, 0.97);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                border-left: 1px solid rgba(255, 255, 255, 0.08);
                transition: right 0.35s ease;
                z-index: 999;
                overflow-y: auto;
            }
            .main-nav.open {
                right: 0;
            }
            .main-nav ul {
                flex-direction: column;
                padding: 24px;
                gap: 4px;
            }
            .main-nav li a {
                padding: 14px 16px;
                font-size: 16px;
                min-height: 48px;
                display: flex;
                align-items: center;
            }
            .nav-cta {
                display: none;
            }
            .hero {
                padding: 140px 0 100px;
            }
            .hero-title {
                font-size: 34px;
            }
            .hero-subtitle {
                font-size: 15px;
            }
            .section-title {
                font-size: 28px;
            }
            .section-subtitle {
                font-size: 14px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-item {
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            }
            .stat-item:nth-child(2n) {
                border-right: none;
            }
            .stat-item:nth-child(n+3) {
                border-bottom: none;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .faq-wrap {
                padding: 20px;
            }
            .faq-question {
                font-size: 15px;
            }
            .contact-form-card {
                padding: 24px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 29px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .section-title {
                font-size: 25px;
            }
            .service-card {
                padding: 24px 20px;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .stat-item {
                border-right: none;
                border-bottom: 1px solid rgba(255, 255, 255, 0.05);
                padding: 24px 20px;
            }
            .stat-item:last-child {
                border-bottom: none;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .process-step {
                flex-direction: column;
                gap: 12px;
            }
            .step-num {
                width: 38px;
                height: 38px;
                font-size: 16px;
            }
        }

/* roulang page: article */
:root {
  --bg-deep: #0A182F;
  --bg-panel: #0F2440;
  --bg-darker: rgba(4, 12, 27, 0.55);
  --bg-card: rgba(255, 255, 255, 0.04);
  --border-card: rgba(255, 255, 255, 0.08);
  --cyan: #00D9FF;
  --amber: #FFB347;
  --text-main: #E6F1FF;
  --text-secondary: #94A9C9;
  --text-muted: #5B7395;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.25);
  --shadow-cyan: 0 4px 20px rgba(0, 217, 255, 0.25);
  --shadow-amber: 0 4px 20px rgba(255, 179, 71, 0.3);
  --transition: all 0.3s ease;
  --header-height: 72px;
  --space-section: 80px;
  --container-max: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(ellipse at 15% 10%, rgba(0, 217, 255, 0.07), transparent 55%),
    radial-gradient(ellipse at 85% 90%, rgba(255, 179, 71, 0.06), transparent 50%),
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: auto, auto, 44px 44px, 44px 44px;
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

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

ul,
ol {
  list-style: none;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 24px);
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10, 24, 47, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(10, 24, 47, 0.95);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 20px;
}

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

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.4px;
  white-space: nowrap;
}

.logo-short {
  display: inline-block;
  margin-left: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  color: var(--cyan);
  background: rgba(0, 217, 255, 0.1);
  border: 1px solid rgba(0, 217, 255, 0.3);
  vertical-align: middle;
  letter-spacing: 0.2px;
}

.main-nav ul {
  display: flex;
  gap: 4px;
}

.main-nav a {
  display: inline-block;
  padding: 8px 18px;
  border-radius: 999px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}

.main-nav a:hover {
  color: var(--cyan);
  background: rgba(0, 217, 255, 0.08);
}

.main-nav a.active {
  color: var(--cyan);
}

.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 20px;
  height: 2px;
  background: var(--cyan);
  border-radius: 2px;
  box-shadow: 0 0 10px rgba(0, 217, 255, 0.8);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: 0;
  padding: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-cyan {
  background: linear-gradient(135deg, #00D9FF, #00B8FF);
  color: #062033;
  box-shadow: var(--shadow-cyan);
}

.btn-cyan:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 217, 255, 0.4);
}

.btn-amber {
  background: linear-gradient(135deg, #FFB347, #FF9A2E);
  color: #3A2205;
  box-shadow: var(--shadow-amber);
}

.btn-amber:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 179, 71, 0.45);
}

.btn-outline {
  background: transparent;
  border: 1px solid rgba(0, 217, 255, 0.4);
  color: var(--cyan);
}

.btn-outline:hover {
  background: rgba(0, 217, 255, 0.1);
  box-shadow: 0 0 20px rgba(0, 217, 255, 0.2);
}

.btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 76px 0 64px;
  background: linear-gradient(rgba(10, 24, 47, 0.92), rgba(10, 24, 47, 0.84)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  overflow: hidden;
}

.article-hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -80px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(0, 217, 255, 0.12), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.article-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 860px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: var(--transition);
}

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

.breadcrumb-sep {
  color: rgba(255, 255, 255, 0.25);
}

.breadcrumb-current {
  color: var(--text-secondary);
  max-width: 260px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-hero .badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 16px;
  border-radius: 999px;
  background: rgba(0, 217, 255, 0.1);
  border: 1px solid rgba(0, 217, 255, 0.3);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 18px;
}

.article-hero h1 {
  font-size: clamp(28px, 4.4vw, 44px);
  line-height: 1.28;
  color: #fff;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}

.article-meta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px 32px;
  color: var(--text-muted);
  font-size: 14px;
}

.article-meta i {
  color: var(--cyan);
  margin-right: 6px;
  opacity: 0.8;
}

/* ===== Article Body ===== */
.article-body-section {
  padding: 64px 0 80px;
}

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

.article-content {
  background: var(--bg-darker);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 4.5vw, 52px);
}

.article-content p {
  font-size: 16px;
  line-height: 1.85;
  color: #C6DAEE;
  margin-bottom: 20px;
}

.article-content h2,
.article-content h3,
.article-content h4 {
  color: var(--text-main);
  font-weight: 600;
  margin-top: 40px;
  margin-bottom: 16px;
  line-height: 1.4;
}

.article-content h2 {
  font-size: 28px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.article-content h3 {
  font-size: 22px;
}

.article-content h4 {
  font-size: 18px;
  color: var(--cyan);
}

.article-content ul,
.article-content ol {
  margin: 0 0 22px;
  padding-left: 26px;
  color: #C6DAEE;
  font-size: 16px;
  line-height: 1.8;
}

.article-content ul {
  list-style: disc;
}

.article-content ol {
  list-style: decimal;
}

.article-content li {
  margin-bottom: 8px;
}

.article-content blockquote {
  position: relative;
  margin: 28px 0;
  padding: 20px 24px 20px 32px;
  background: rgba(0, 217, 255, 0.05);
  border-left: 3px solid var(--cyan);
  border-radius: 0 12px 12px 0;
  color: #B9CFE8;
  font-style: normal;
}

.article-content blockquote p {
  margin-bottom: 8px;
  color: inherit;
}

.article-content blockquote p:last-child {
  margin-bottom: 0;
}

.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 24px auto;
}

.article-content figure {
  margin: 28px 0;
}

.article-content figure img {
  margin: 0 auto;
}

.article-content figcaption {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 10px;
}

.article-content a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: var(--transition);
}

.article-content a:hover {
  color: #fff;
  background: rgba(0, 217, 255, 0.15);
  border-radius: 4px;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 14px;
  background: rgba(0, 0, 0, 0.15);
  border-radius: 12px;
  overflow: hidden;
}

.article-content th {
  background: rgba(0, 217, 255, 0.1);
  color: var(--cyan);
  font-weight: 600;
}

.article-content th,
.article-content td {
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  text-align: left;
}

.article-content td {
  color: var(--text-secondary);
}

.article-content code {
  background: rgba(0, 217, 255, 0.08);
  color: var(--cyan);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 14px;
}

/* ===== Article Actions ===== */
.article-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

/* ===== Empty State ===== */
.empty-state {
  max-width: 640px;
  margin: 20px auto 0;
  text-align: center;
  background: var(--bg-card);
  border: 1px dashed rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 60px 32px;
}

.empty-state i {
  font-size: 48px;
  color: var(--amber);
  margin-bottom: 18px;
  opacity: 0.7;
}

.empty-state p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 15px;
}

/* ===== CTA Section ===== */
.cta-section {
  padding: 20px 0 80px;
}

.cta-card {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  background: linear-gradient(135deg, rgba(15, 36, 64, 0.96), rgba(10, 24, 47, 0.92));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 44px 48px;
  overflow: hidden;
}

.cta-card::after {
  content: "";
  position: absolute;
  right: -100px;
  top: -100px;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(255, 179, 71, 0.18), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-card::before {
  content: "";
  position: absolute;
  left: 30%;
  bottom: -120px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(0, 217, 255, 0.12), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.cta-img {
  width: 240px;
  aspect-ratio: 4 / 3;
  border-radius: 12px;
  object-fit: cover;
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  flex-shrink: 0;
  position: relative;
  z-index: 2;
}

.cta-info {
  flex: 1;
  position: relative;
  z-index: 2;
}

.cta-info h2 {
  font-size: clamp(22px, 3vw, 30px);
  color: #fff;
  margin-bottom: 12px;
  line-height: 1.35;
}

.cta-info p {
  color: var(--text-secondary);
  font-size: 15px;
  margin-bottom: 14px;
  max-width: 520px;
}

.cta-contact-line {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 14px;
  color: var(--text-muted);
}

.cta-contact-line span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.cta-contact-line i {
  color: var(--amber);
}

.cta-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  z-index: 2;
  flex-shrink: 0;
}

/* ===== Footer ===== */
.site-footer {
  padding-top: 68px;
  background: rgba(6, 16, 34, 0.96);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 48px;
}

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

.footer-brand-desc {
  max-width: 330px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.85;
  margin-top: 18px;
}

.footer-column h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 0.3px;
}

.footer-column ul li {
  margin-bottom: 12px;
}

.footer-column ul a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: var(--transition);
}

.footer-column ul a:hover {
  color: var(--cyan);
}

.footer-contact li {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 14px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.6;
}

.footer-contact li span {
  color: var(--text-muted);
  flex-shrink: 0;
}

.footer-bottom {
  padding: 22px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 13px;
}

.footer-bottom a {
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-bottom a:hover {
  color: var(--cyan);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root {
    --space-section: 64px;
  }

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

  .cta-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .cta-img {
    width: 100%;
    max-width: 420px;
  }

  .cta-actions {
    flex-direction: row;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-cta {
    display: none;
  }

  .main-nav {
    position: fixed;
    top: var(--header-height);
    right: -280px;
    width: 280px;
    height: calc(100vh - var(--header-height));
    background: rgba(10, 24, 47, 0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    padding: 32px 24px;
    transition: right 0.35s ease;
    z-index: 999;
    overflow-y: auto;
  }

  .main-nav.open {
    right: 0;
  }

  .main-nav ul {
    flex-direction: column;
    gap: 8px;
  }

  .main-nav a {
    display: block;
    padding: 14px 18px;
    font-size: 16px;
  }

  .main-nav a.active::after {
    left: 18px;
    width: 16px;
  }

  .article-hero {
    padding: 52px 0 44px;
  }

  .article-body-section {
    padding: 44px 0 56px;
  }

  .article-meta {
    justify-content: center;
  }

  .cta-section {
    padding-bottom: 56px;
  }
}

@media (max-width: 640px) {
  :root {
    --space-section: 48px;
  }

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

  .logo-short {
    display: none;
  }

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

  .breadcrumb {
    font-size: 13px;
  }

  .article-content {
    padding: 24px 18px;
  }

  .article-content h2 {
    font-size: 22px;
  }

  .article-content h3 {
    font-size: 19px;
  }

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .cta-card {
    padding: 32px 24px;
  }

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

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

  .cta-contact-line {
    flex-direction: column;
    gap: 8px;
  }

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

  .empty-state {
    padding: 40px 20px;
  }
}

/* roulang page: category2 */
:root {
            --bg-primary: #0A182F;
            --bg-panel: #0F2440;
            --accent-cyan: #00D9FF;
            --accent-amber: #FFB347;
            --text-primary: #E6F1FF;
            --text-secondary: #94A9C9;
            --text-muted: #5B7395;
            --border-glass: rgba(255,255,255,0.08);
            --border-input: rgba(255,255,255,0.12);
            --radius-card: 16px;
            --radius-btn: 999px;
            --radius-input: 12px;
            --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
            position: relative;
        }
        body::before {
            content: '';
            position: fixed;
            inset: 0;
            background-image:
                linear-gradient(rgba(0, 217, 255, 0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 217, 255, 0.025) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
            z-index: 0;
        }
        body::after {
            content: '';
            position: fixed;
            top: -10%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 217, 255, 0.08) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
            filter: blur(60px);
        }

        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 2;
        }

        a { color: var(--accent-cyan); text-decoration: none; transition: color 0.2s; }
        a:hover { color: #66E6FF; }
        img { max-width: 100%; display: block; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input, textarea { font-family: inherit; }

        /* 导航 */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(10, 24, 47, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-glass);
            transition: background 0.4s ease, box-shadow 0.4s ease;
        }
        .site-header.scrolled {
            background: rgba(10, 24, 47, 0.96);
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 10px;
            background: rgba(0, 217, 255, 0.08);
            border: 1px solid rgba(0, 217, 255, 0.2);
        }
        .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .logo-short {
            font-size: 13px;
            font-weight: 400;
            color: var(--text-secondary);
            margin-left: 2px;
        }
        .main-nav ul {
            display: flex;
            list-style: none;
            gap: 4px;
        }
        .main-nav a {
            display: inline-block;
            padding: 8px 16px;
            font-size: 15px;
            color: var(--text-secondary);
            border-radius: var(--radius-btn);
            transition: var(--transition);
            position: relative;
        }
        .main-nav a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
        }
        .main-nav a.active {
            color: var(--accent-cyan);
            font-weight: 600;
            background: rgba(0, 217, 255, 0.06);
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 217, 255, 0.5);
        }
        .nav-cta {
            flex-shrink: 0;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 12px;
            border-radius: 8px;
            border: 1px solid var(--border-glass);
            background: rgba(255, 255, 255, 0.03);
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .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); }

        /* 按钮 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: var(--radius-btn);
            transition: var(--transition);
            border: 1px solid transparent;
            gap: 8px;
            white-space: nowrap;
        }
        .btn-cyan {
            background: var(--accent-cyan);
            color: #081524;
        }
        .btn-cyan:hover {
            background: #33E0FF;
            color: #081524;
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 217, 255, 0.35);
        }
        .btn-amber {
            background: var(--accent-amber);
            color: #1A2333;
        }
        .btn-amber:hover {
            background: #FFC064;
            color: #1A2333;
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(255, 179, 71, 0.35);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-primary);
            border-color: var(--border-glass);
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-primary);
            border-color: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }
        .btn:focus-visible,
        .nav-toggle:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
        }

        /* Hero区 */
        .category-hero {
            position: relative;
            padding: 160px 0 0;
            min-height: 500px;
            background-image: linear-gradient(130deg, rgba(10, 24, 47, 0.92) 30%, rgba(15, 36, 64, 0.75)), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: 20%;
            right: -100px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 179, 71, 0.06) 0%, transparent 65%);
            filter: blur(50px);
            pointer-events: none;
        }
        .category-hero-content {
            max-width: 720px;
            padding-bottom: 48px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            font-size: 13px;
            border-radius: var(--radius-btn);
            background: rgba(0, 217, 255, 0.08);
            border: 1px solid rgba(0, 217, 255, 0.2);
            color: var(--accent-cyan);
            margin-bottom: 24px;
            letter-spacing: 0.5px;
        }
        .hero-badge::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-cyan);
            box-shadow: 0 0 10px rgba(0, 217, 255, 0.8);
        }
        .category-hero h1 {
            font-size: 46px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: 0.5px;
            color: #fff;
            margin-bottom: 20px;
        }
        .category-hero h1 .accent {
            color: var(--accent-cyan);
        }
        .category-hero-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 36px;
            max-width: 600px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* Hero指标带 */
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            padding: 8px 0;
            margin-bottom: 0;
        }
        .stat-item {
            padding: 24px 20px;
            text-align: center;
            border-right: 1px solid var(--border-glass);
        }
        .stat-item:last-child { border-right: none; }
        .stat-num {
            font-size: 40px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.15;
            font-family: "SF Mono", "Roboto Mono", "Consolas", monospace;
        }
        .stat-num span {
            font-size: 18px;
            color: var(--accent-amber);
            font-weight: 600;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 6px;
            font-weight: 500;
        }
        .stat-src {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
            line-height: 1.5;
        }

        /* 通用区块 */
        .section {
            padding: 90px 0;
            position: relative;
        }
        .section-alt {
            background: rgba(15, 36, 64, 0.45);
            border-top: 1px solid var(--border-glass);
            border-bottom: 1px solid var(--border-glass);
        }
        .section-head {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 60px;
        }
        .section-head h2 {
            font-size: 34px;
            font-weight: 600;
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-secondary);
        }

        /* 玻璃卡片 */
        .glass-card {
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px;
            transition: var(--transition);
        }
        .glass-card:hover {
            border-color: rgba(0, 217, 255, 0.25);
            transform: translateY(-4px);
            box-shadow: 0 16px 44px rgba(0, 0, 0, 0.35);
        }

        /* 核心能力区 */
        .capability-layout {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 48px;
            align-items: stretch;
        }
        .capability-aside {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .cap-item {
            display: flex;
            gap: 20px;
            padding: 28px;
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            transition: var(--transition);
        }
        .cap-item:hover {
            border-color: rgba(255, 179, 71, 0.3);
            background: rgba(255, 179, 71, 0.03);
        }
        .cap-num {
            font-size: 15px;
            font-weight: 700;
            color: var(--accent-amber);
            font-family: "SF Mono", "Roboto Mono", monospace;
            padding-top: 4px;
            flex-shrink: 0;
        }
        .cap-item h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .cap-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .capability-cards {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .cap-card {
            display: flex;
            flex-direction: column;
        }
        .cap-card h3 {
            font-size: 19px;
            font-weight: 600;
            margin-top: 20px;
            margin-bottom: 10px;
        }
        .cap-card p {
            font-size: 14px;
            color: var(--text-secondary);
            flex: 1;
        }
        .cap-card a {
            display: inline-block;
            margin-top: 18px;
            font-size: 14px;
            font-weight: 500;
        }
        .cap-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 217, 255, 0.08);
            border: 1px solid rgba(0, 217, 255, 0.15);
            color: var(--accent-cyan);
            flex-shrink: 0;
        }
        .cap-card:nth-child(2) .cap-icon {
            background: rgba(255, 179, 71, 0.08);
            border-color: rgba(255, 179, 71, 0.15);
            color: var(--accent-amber);
        }

        /* 流程区 */
        .process-wrap {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 60px;
        }
        .process-side h3 {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .process-side p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .process-side .badge {
            display: inline-block;
            padding: 6px 14px;
            font-size: 13px;
            border-radius: var(--radius-btn);
            background: rgba(255, 179, 71, 0.1);
            border: 1px solid rgba(255, 179, 71, 0.2);
            color: var(--accent-amber);
            margin-top: 8px;
        }
        .process-list {
            list-style: none;
            position: relative;
        }
        .process-list::before {
            content: '';
            position: absolute;
            left: 29px;
            top: 40px;
            bottom: 40px;
            width: 1px;
            background: linear-gradient(180deg, rgba(0, 217, 255, 0.4), rgba(0, 217, 255, 0.05));
        }
        .process-list li {
            position: relative;
            display: flex;
            gap: 28px;
            padding: 28px 0;
        }
        .process-list li:first-child { padding-top: 0; }
        .process-list li:last-child { padding-bottom: 0; }
        .process-num {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            font-family: "SF Mono", "Roboto Mono", monospace;
            background: var(--bg-panel);
            border: 1px solid rgba(0, 217, 255, 0.25);
            color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 217, 255, 0.08);
            flex-shrink: 0;
            /* 解决z-index覆盖连线 */
            z-index: 2;
            background-color: #0F2440;
        }
        .process-content h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .process-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* 场景区 */
        .scenario-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            margin-bottom: 72px;
        }
        .scenario-row:last-child { margin-bottom: 0; }
        .scenario-row.flip .scenario-media { order: 2; }
        .scenario-row.flip .scenario-text { order: 1; }
        .scenario-media {
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-card);
            position: relative;
        }
        .scenario-media::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-card);
            background: linear-gradient(180deg, transparent 60%, rgba(10, 24, 47, 0.3));
            pointer-events: none;
        }
        .scenario-media img {
            width: 100%;
            height: 300px;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .scenario-media:hover img {
            transform: scale(1.03);
        }
        .scenario-text .badge {
            display: inline-block;
            padding: 5px 14px;
            font-size: 13px;
            border-radius: var(--radius-btn);
            background: rgba(0, 217, 255, 0.08);
            border: 1px solid rgba(0, 217, 255, 0.18);
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }
        .scenario-text h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 14px;
            line-height: 1.4;
        }
        .scenario-text p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .scenario-text ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .scenario-text ul li {
            position: relative;
            padding-left: 22px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }
        .scenario-text ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10px;
            width: 8px;
            height: 8px;
            border-radius: 2px;
            background: var(--accent-amber);
            transform: rotate(45deg);
        }

        /* 数据指标区 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stats-card {
            text-align: center;
            padding: 40px 24px;
        }
        .stats-num {
            font-size: 48px;
            font-weight: 700;
            line-height: 1.1;
            color: var(--accent-amber);
            font-family: "SF Mono", "Roboto Mono", monospace;
            text-shadow: 0 0 30px rgba(255, 179, 71, 0.15);
        }
        .stats-num span {
            font-size: 20px;
            font-weight: 500;
            color: var(--text-secondary);
        }
        .stats-label {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-primary);
            margin-top: 10px;
        }
        .stats-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 6px;
            line-height: 1.6;
        }

        /* FAQ */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.03);
            margin-bottom: 16px;
            overflow: hidden;
            transition: border-color 0.3s ease, background 0.3s ease;
        }
        .faq-item.open {
            border-color: rgba(0, 217, 255, 0.25);
            background: rgba(255, 255, 255, 0.04);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 28px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            text-align: left;
            gap: 16px;
            transition: color 0.2s;
        }
        .faq-question:hover { color: var(--accent-cyan); }
        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid rgba(0, 217, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: transform 0.3s ease, border-color 0.3s, background 0.3s, color 0.3s;
            font-size: 18px;
            color: var(--accent-cyan);
            font-style: normal;
            line-height: 1;
            position: relative;
        }
        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            width: 10px;
            height: 2px;
            background: currentColor;
            border-radius: 2px;
            transition: transform 0.3s ease;
        }
        .faq-icon::after { transform: rotate(90deg); }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            color: var(--accent-amber);
            border-color: rgba(255, 179, 71, 0.4);
            background: rgba(255, 179, 71, 0.05);
        }
        .faq-item.open .faq-icon::after { transform: rotate(0deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            background: rgba(0, 0, 0, 0.15);
        }
        .faq-answer-inner {
            padding: 0 28px 28px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.85;
        }

        /* CTA区 */
        .section-cta {
            position: relative;
            overflow: hidden;
        }
        .section-cta::before {
            content: '';
            position: absolute;
            bottom: -50%;
            left: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 179, 71, 0.05) 0%, transparent 65%);
            filter: blur(50px);
            pointer-events: none;
        }
        .cta-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .cta-info h2 {
            font-size: 32px;
            font-weight: 600;
            line-height: 1.35;
            margin-bottom: 16px;
        }
        .cta-info > p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .cta-contact-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .cta-contact-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 15px;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .cta-contact-list li span {
            color: var(--accent-cyan);
            font-size: 14px;
        }
        .contact-form-card {
            padding: 36px;
        }
        .contact-form-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 6px;
        }
        .contact-form-card > p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 8px;
            font-weight: 500;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            height: 46px;
            padding: 0 16px;
            font-size: 15px;
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-input);
            border-radius: var(--radius-input);
            transition: var(--transition);
            outline: none;
        }
        .form-group textarea {
            height: 120px;
            padding: 14px 16px;
            resize: vertical;
            line-height: 1.6;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.12);
            background: rgba(255, 255, 255, 0.06);
        }
        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: var(--text-muted);
        }
        .submit-btn {
            width: 100%;
            height: 48px;
            justify-content: center;
            font-size: 15px;
        }
        .submit-btn.loading {
            opacity: 0.7;
            cursor: not-allowed;
            position: relative;
            pointer-events: none;
        }
        .submit-btn.loading::before {
            content: '';
            width: 16px;
            height: 16px;
            border: 2px solid rgba(26, 35, 51, 0.3);
            border-top-color: #1A2333;
            border-radius: 50%;
            animation: spin 0.7s linear infinite;
            margin-right: 10px;
        }
        .submit-btn.success {
            background: #2ECC71;
            color: #fff;
            cursor: not-allowed;
        }
        @keyframes spin {
            to { transform: rotate(360deg); }
        }

        /* 页脚 */
        .site-footer {
            background: rgba(7, 18, 36, 0.9);
            border-top: 1px solid var(--border-glass);
            padding: 72px 0 32px;
            position: relative;
            z-index: 2;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
        }
        .footer-brand-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 280px;
        }
        .footer-column h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 18px;
        }
        .footer-column ul {
            list-style: none;
        }
        .footer-column ul li {
            margin-bottom: 12px;
        }
        .footer-column ul a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.2s;
        }
        .footer-column ul a:hover {
            color: var(--accent-cyan);
        }
        .footer-contact li {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .footer-contact li span {
            display: inline-block;
            color: var(--text-muted);
            font-size: 13px;
            margin-right: 4px;
            min-width: 40px;
        }
        .footer-bottom {
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .category-hero h1 { font-size: 38px; }
            .capability-layout { grid-template-columns: 1fr; gap: 32px; }
            .process-wrap { grid-template-columns: 1fr; gap: 40px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .hero-stats { grid-template-columns: repeat(2, 1fr); }
            .stat-item:nth-child(2) { border-right: none; }
            .stat-item:nth-child(1), .stat-item:nth-child(2) { border-bottom: 1px solid var(--border-glass); }
        }
        @media (max-width: 768px) {
            .nav-container { height: 60px; }
            .main-nav {
                position: fixed;
                top: 60px;
                right: -100%;
                width: 85%;
                max-width: 340px;
                height: calc(100vh - 60px);
                background: rgba(10, 24, 47, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border-left: 1px solid var(--border-glass);
                transition: right 0.35s ease;
                padding: 32px 24px;
                z-index: 101;
            }
            .main-nav.open { right: 0; }
            .main-nav ul { flex-direction: column; gap: 8px; }
            .main-nav a {
                display: block;
                padding: 14px 18px;
                font-size: 16px;
                border-radius: 12px;
            }
            .main-nav a.active::after { display: none; }
            .main-nav a.active {
                background: rgba(0, 217, 255, 0.08);
            }
            .nav-cta { display: none; }
            .nav-toggle { display: flex; }
            .category-hero {
                padding: 120px 0 0;
            }
            .category-hero h1 { font-size: 32px; }
            .hero-actions .btn { flex: 1; }
            .section { padding: 64px 0; }
            .section-head { margin-bottom: 40px; }
            .section-head h2 { font-size: 27px; }
            .stat-num { font-size: 34px; }
            .capability-cards { grid-template-columns: 1fr; }
            .scenario-row { grid-template-columns: 1fr; gap: 32px; }
            .scenario-row.flip .scenario-media { order: 0; }
            .scenario-row.flip .scenario-text { order: 0; }
            .scenario-media img { height: 220px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .cta-layout { grid-template-columns: 1fr; gap: 40px; }
            .faq-question { padding: 20px; font-size: 15px; }
            .faq-answer-inner { padding: 0 20px 20px; font-size: 14px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .category-hero h1 { font-size: 28px; }
            .hero-stats { grid-template-columns: 1fr; }
            .stat-item {
                border-right: none;
                border-bottom: 1px solid var(--border-glass);
            }
            .stat-item:last-child { border-bottom: none; }
            .stats-grid { grid-template-columns: 1fr; }
            .logo-short { display: none; }
            .logo-text { font-size: 16px; }
            .btn { padding: 12px 22px; font-size: 14px; }
            .contact-form-card { padding: 24px; }
        }
        @media (max-width: 350px) {
            .category-hero h1 {
                font-size: 24px;
            }
            .hero-badge { font-size: 12px; padding: 5px 12px; }
        }