/* 设计种子2239 深色青橙 */
        :root{
            --main: #22d3ee;
            --accent: #fb923c;
            --bg: #0f172a;
            --text: #e2e8f0;
            --card-bg: rgba(255,255,255,0.045);
            --border-light: rgba(255,255,255,0.08);
            --radius: 20px;
            --radius-sm: 12px;
            --shadow: 0 12px 30px rgba(0,0,0,0.25);
        }
        *{margin:0;padding:0;box-sizing:border-box;}
        body{
            background-color: var(--bg);
            color: var(--text);
            font-family: 'Inter', sans-serif;
            font-weight: 400;
            letter-spacing: 0.01em;
            background-image: radial-gradient(rgba(255,255,255,0.025) 1px, transparent 1px);
            background-size: 12px 12px; /* 细微噪点纹理 */
            overflow-x: hidden;
        }
        /* 胶囊圆角+轻阴影 */
        .card, .bento-item, .step-card, .faq-item {
            border-radius: var(--radius);
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            box-shadow: 0 6px 16px rgba(0,0,0,0.12);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }
        .card:hover, .bento-item:hover, .step-card:hover{
            transform: translateY(-4px);
            box-shadow: 0 18px 30px rgba(0,0,0,0.3);
            border-color: rgba(34,211,238,0.25);
        }
        h1,h2,h3,h4{
            font-weight: 900;
            letter-spacing: -0.02em;
            color: #fff;
        }
        .display-data{
            font-family: 'SF Mono', 'Menlo', 'Courier New', monospace;
            font-weight: 600;
        }
        .navbar{
            background: rgba(15,23,42,0.85);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-light);
            padding: 0.6rem 1rem;
            font-weight: 500;
        }
        .navbar-brand{
            font-weight: 800;
            font-size: 1.5rem;
            color: var(--main);
        }
        .nav-link{
            color: var(--text) !important;
            font-weight: 500;
            margin: 0 0.2rem;
            border-radius: 40px;
            padding: 0.4rem 0.9rem !important;
            font-size: 0.9rem;
        }
        .nav-link:hover{
            background: rgba(34,211,238,0.1);
            color: var(--main) !important;
        }
        .btn-custom{
            background: var(--accent);
            color: #0b1522;
            font-weight: 700;
            border-radius: 40px;
            padding: 0.5rem 1.3rem;
            border: none;
            transition: 0.15s;
        }
        .btn-custom:hover{
            background: #ffa25d;
            color: #0b1522;
            box-shadow: 0 6px 14px rgba(251,146,60,0.3);
        }
        .btn-outline-main{
            background: transparent;
            border: 1.5px solid var(--main);
            color: var(--main);
            border-radius: 40px;
            padding: 0.4rem 1.2rem;
            font-weight: 600;
        }
        .btn-outline-main:hover{
            background: rgba(34,211,238,0.1);
        }
        .bento-grid{
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 1.2rem;
        }
        .bento-item{
            padding: 1.5rem 1rem;
            border-radius: 24px;
        }
        .bento-item.large{
            grid-column: span 2;
        }
        .bento-item.full{
            grid-column: 1 / -1;
        }
        .icon-single{
            font-size: 2.2rem;
            color: var(--main);
            background: rgba(34,211,238,0.08);
            border-radius: 60%;
            padding: 0.6rem;
            line-height: 1;
            border: 1px solid rgba(34,211,238,0.2);
        }
        .icon-accent{
            color: var(--accent);
            background: rgba(251,146,60,0.08);
            border-color: rgba(251,146,60,0.2);
        }
        .faq-item{
            background: rgba(0,0,0,0.2);
            border-radius: 18px;
            margin-bottom: 0.8rem;
        }
        .faq-question{
            padding: 1rem 1.2rem;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-answer{
            padding: 0 1.2rem 1rem;
            color: #b0c4d9;
            font-size: 0.9rem;
            border-top: 1px dashed var(--border-light);
        }
        .footer-bg{
            border-top: 1px solid rgba(255,255,255,0.05);
            background: rgba(0,0,0,0.2);
        }
        .stat-number{
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--main);
        }
        .mono{
            font-family: 'SF Mono', monospace;
        }
        .step-bar{
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .step-card{
            flex:1 1 160px;
            padding: 1.2rem;
            background: rgba(255,255,255,0.03);
        }
        #backToTop{
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: var(--main);
            color: #0b1522;
            border: none;
            border-radius: 40px;
            width: 45px;
            height: 45px;
            font-size: 1.4rem;
            opacity: 0;
            visibility: hidden;
            transition: 0.2s;
            box-shadow: 0 4px 14px rgba(0,0,0,0.3);
            z-index: 100;
        }
        #backToTop.show{
            opacity: 1;
            visibility: visible;
        }
        .hero-stats span{
            font-size: 1rem;
            color: var(--text);
        }
        .navbar-toggler{
            border-color: rgba(255,255,255,0.2);
        }
        .navbar-toggler-icon{
            filter: invert(1);
        }

/* --- 子页面追加 --- */
.about-hero {
            padding: 100px 0 60px;
            background: linear-gradient(135deg, rgba(34, 211, 238, 0.08) 0%, transparent 50%, rgba(251, 146, 60, 0.08) 100%);
            border-bottom: 1px solid var(--border-light);
        }
.about-section {
            padding: 60px 0;
            border-bottom: 1px solid var(--border-light);
        }
.about-section:last-child {
            border-bottom: none;
        }
.about-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            background: rgba(34, 211, 238, 0.12);
            color: var(--main);
            font-size: 1.4rem;
            margin-bottom: 16px;
        }
.about-icon.orange {
            background: rgba(251, 146, 60, 0.12);
            color: var(--accent);
        }
.about-content p {
            color: var(--text);
            opacity: 0.85;
            line-height: 1.8;
            margin-bottom: 16px;
        }
.about-content p:last-child {
            margin-bottom: 0;
        }
.about-content h3 {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 16px;
        }
.about-content h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--main);
            margin-bottom: 20px;
        }
.about-content ul {
            padding-left: 0;
            list-style: none;
            margin-bottom: 16px;
        }
.about-content ul li {
            padding: 8px 0 8px 28px;
            position: relative;
            color: var(--text);
            opacity: 0.85;
        }
.about-content ul li::before {
            content: '▹';
            position: absolute;
            left: 0;
            color: var(--main);
            font-weight: 700;
        }
.timeline-item {
            position: relative;
            padding-left: 24px;
            margin-bottom: 20px;
            border-left: 2px solid rgba(34, 211, 238, 0.25);
        }
.timeline-item:last-child {
            margin-bottom: 0;
        }
.timeline-item .timeline-date {
            color: var(--main);
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 6px;
            font-family: 'Inter', sans-serif;
        }
.timeline-item p {
            margin-bottom: 0;
        }
.stat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 16px;
            margin: 24px 0;
        }
.stat-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 24px 16px;
            text-align: center;
            transition: border-color 0.3s ease;
        }
.stat-card:hover {
            border-color: rgba(34, 211, 238, 0.4);
        }
.stat-label {
            font-size: 0.9rem;
            color: var(--text);
            opacity: 0.7;
        }
.team-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 24px;
        }
.team-member {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 20px;
            text-align: center;
            transition: border-color 0.3s ease;
        }
.team-member:hover {
            border-color: rgba(251, 146, 60, 0.4);
        }
.team-member .member-icon {
            font-size: 2rem;
            color: var(--accent);
            margin-bottom: 12px;
        }
.team-member .member-name {
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }
.team-member .member-role {
            font-size: 0.85rem;
            color: var(--text);
            opacity: 0.65;
        }
.about-nav {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 24px;
        }
.about-nav a {
            display: inline-block;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            color: var(--text);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.3s ease;
        }
.about-nav a:hover {
            border-color: var(--main);
            color: var(--main);
        }

/* --- 子页面追加 --- */
/* 确保隐私政策内容区与首页背景融为一体 */
        .privacy-hero {
            background: radial-gradient(circle at 20% 20%, rgba(34, 211, 238, 0.08), transparent 40%),
                        radial-gradient(circle at 80% 0%, rgba(251, 146, 60, 0.06), transparent 35%);
            border-bottom: 1px solid var(--border-light);
        }
.privacy-section h2 {
            margin-top: 2.2rem;
            margin-bottom: 1rem;
            font-weight: 700;
            letter-spacing: -0.01em;
        }
.privacy-section h2 i {
            color: var(--accent);
            margin-right: 0.5rem;
        }
.privacy-section p, .privacy-section li {
            color: rgba(226, 232, 240, 0.85);
            line-height: 1.7;
        }
.privacy-section ul {
            padding-left: 1.2rem;
        }
.privacy-section ul li {
            margin-bottom: 0.4rem;
        }
.privacy-card {
            background: var(--card-bg);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 1.5rem 1.8rem;
            backdrop-filter: blur(6px);
            transition: border-color .2s;
        }
.privacy-card:hover {
            border-color: rgba(34, 211, 238, 0.3);
        }
.privacy-card i {
            color: var(--main);
            font-size: 1.6rem;
            margin-bottom: 0.8rem;
        }
.muted-text {
            color: rgba(148, 163, 184, 0.8);
            font-size: 0.9rem;
        }
/* 高亮当前导航 */
        .nav-link.active-privacy {
            color: var(--main) !important;
            font-weight: 600;
            border-bottom: 2px solid var(--main);
        }