:root {
    --primary: #ea580c;
    --accent: #d97706;
    --bg: #fffbf5;
    --text: #1c1917;
    --border: #e8e0d4;
    --subtle-bg: #faf3ea;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
    background-color: var(--bg);
    color: var(--text);
    font-family: "Noto Sans SC", "Source Han Sans CN", "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.8;
    font-size: 16px;
    letter-spacing: 0.01em;
    overflow-x: hidden;
}
h1,h2,h3,h4,h5,.font-serif {
    font-family: "Noto Serif SC", "Source Han Serif CN", "Songti SC", "SimSun", serif;
    font-weight: 700;
}
a { color: var(--primary); text-decoration:none; transition: opacity .2s; }
a:hover { opacity: .75; color: var(--accent); }

/* 滚动进度条 */
.progress-bar-top {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    width: 0%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    z-index: 9999;
    border-radius: 0 3px 3px 0;
    transition: width 0.1s ease;
}

/* 导航栏 */
.navbar-custom {
    background: rgba(255, 251, 245, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 14px 0;
    transition: background 0.3s ease, box-shadow 0.3s ease;
    z-index: 1000;
}
.navbar-custom.scrolled {
    background: rgba(255, 251, 245, 0.98);
    border-bottom: 1px solid var(--border);
}
.navbar-brand {
    font-family: "Noto Serif SC", serif;
    font-weight: 800;
    font-size: 1.6rem;
    color: var(--text) !important;
    letter-spacing: 1px;
}
.navbar-brand i { color: var(--primary); margin-right: 6px; }
.navbar-nav .nav-link {
    color: var(--text);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.4rem 1.2rem !important;
    border-left: 1px solid transparent;
    transition: color .2s;
}
.navbar-nav .nav-link:hover { color: var(--primary); }
.navbar-toggler { border: 1px solid var(--border); background: transparent; }
.navbar-toggler:focus { box-shadow: none; }

/* 背景网格点阵 */
.bg-dot-grid {
    background-image: radial-gradient(circle, var(--border) 1px, transparent 1px);
    background-size: 28px 28px;
    background-position: center center;
}

/* Hero 区块 */
.hero-section {
    position: relative;
    padding: 80px 0 80px;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(180deg, var(--bg) 0%, #fdf3e7 100%);
}
.hero-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(234,88,12,0.03) 0%, transparent 60%);
    pointer-events: none;
}
.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}
.stat-number {
    font-size: 4rem;
    font-weight: 900;
    line-height: 1;
    color: var(--primary);
    font-family: "Inter", sans-serif;
}
.stat-label { font-size: 0.9rem; color: #6b6460; margin-top: 6px; letter-spacing: 1px; }
.hero-right {
    border-left: 2px solid var(--primary);
    padding-left: 30px;
}
.hero-title {
    font-size: 2.6rem;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--text);
}
.hero-subtitle {
    font-size: 1.05rem;
    color: #57534e;
    max-width: 480px;
}
.btn-custom {
    display:inline-block;
    padding: 12px 36px;
    border: 2px solid var(--primary);
    color: var(--primary);
    font-weight: 600;
    font-size: 1rem;
    background: transparent;
    transition: all .25s ease;
    letter-spacing: 1px;
    border-radius: 0;
}
.btn-custom:hover {
    background: var(--primary);
    color: #fff;
    opacity: 1;
}
.btn-custom-accent {
    display:inline-block;
    padding: 12px 36px;
    border: 2px solid var(--accent);
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    transition: all .25s ease;
    letter-spacing: 1px;
    border-radius: 0;
}
.btn-custom-accent:hover { background: transparent; color: var(--accent); opacity: 1; }

/* 区块通用 */
.section-padding { padding: 90px 0; }
.section-title {
    font-size: 2.2rem;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
}
.section-subtitle { color: #6b6460; font-size: 1rem; margin-bottom: 40px; }
.border-top-custom { border-top: 1px solid var(--border); }
.border-bottom-custom { border-bottom: 1px solid var(--border); }

/* 使用说明时间线 */
.timeline {
    position: relative;
    padding-left: 0;
    list-style: none;
    max-width: 760px;
}
.timeline-item {
    position: relative;
    padding: 0 0 40px 60px;
    border-left: 2px solid var(--border);
    margin-left: 20px;
}
.timeline-item:last-child { border-left-color: transparent; padding-bottom: 0; }
.timeline-item::before {
    content: '';
    position: absolute;
    left: -9px;
    top: 0;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg);
    border: 3px solid var(--primary);
}
.timeline-item h4 { font-size: 1.25rem; margin-bottom: 8px; color: var(--text); }
.timeline-item p { color: #57534e; margin-bottom: 0; }
.timeline-num {
    position: absolute;
    left: -50px;
    top: -4px;
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--primary);
    font-family: "Inter", sans-serif;
    opacity: 0.35;
    width: 50px;
    text-align: right;
}

/* 特色标签页切换 */
.tab-feature { border: 1px solid var(--border); }
.nav-tabs-custom {
    border-bottom: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
}
.nav-tabs-custom .nav-link {
    border: none;
    border-right: 1px solid var(--border);
    padding: 14px 30px;
    color: #6b6460;
    font-weight: 500;
    border-radius: 0;
    background: transparent;
    font-size: 1rem;
}
.nav-tabs-custom .nav-link:last-child { border-right: none; }
.nav-tabs-custom .nav-link.active {
    background: var(--primary);
    color: #fff;
}
.tab-pane-custom { padding: 40px 35px; background: var(--bg); }
.feature-icon { font-size: 2.2rem; color: var(--primary); margin-bottom: 15px; }
.feature-title { font-size: 1.4rem; margin-bottom: 10px; }

/* 长文区块 */
.long-read {
    background: var(--subtle-bg);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.long-read p { color: #44403c; line-height: 2; margin-bottom: 1.2em; }

/* FAQ */
.accordion-custom .accordion-item {
    border: 1px solid var(--border);
    margin-bottom: 16px;
    background: var(--bg);
}
.accordion-custom .accordion-button {
    background: transparent;
    color: var(--text);
    font-weight: 600;
    font-family: "Noto Serif SC", serif;
    padding: 18px 24px;
    font-size: 1.1rem;
    box-shadow: none;
    border-bottom: 1px solid transparent;
}
.accordion-custom .accordion-button:not(.collapsed) {
    color: var(--primary);
    background: transparent;
    border-bottom: 1px solid var(--border);
}
.accordion-custom .accordion-button:focus { box-shadow: none; }
.accordion-custom .accordion-body {
    padding: 20px 24px;
    color: #57534e;
    line-height: 1.9;
}

/* CTA 区块 */
.cta-section {
    border-top: 1px solid var(--border);
    background: var(--bg);
}
.cta-box {
    border: 3px solid var(--primary);
    padding: 60px 40px;
    position: relative;
    background: var(--subtle-bg);
}
.cta-box h2 { font-size: 2.2rem; margin-bottom: 15px; }

/* 图片hover效果 */
.img-hover-wrapper {
    overflow: hidden;
    position: relative;
    background: #f0e9df;
}
.img-hover-wrapper img {
    width: 100%;
    height: auto;
    transition: transform .5s ease;
    display: block;
}
.img-hover-wrapper:hover img { transform: scale(1.05); }
.img-overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: linear-gradient(0deg, rgba(28,25,23,0.9) 0%, rgba(28,25,23,0.3) 60%, transparent 100%);
    color: #fff;
    padding: 40px 20px 20px;
    opacity: 0;
    transition: opacity .3s ease;
    font-size: 0.95rem;
}
.img-hover-wrapper:hover .img-overlay { opacity: 1; }

/* 友情链接 */
.friend-links {
    border-top: 1px solid var(--border);
    background: var(--bg);
    padding: 50px 0;
}
.friend-links-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text);
}
.friend-links a {
    color: #6b6460;
    margin-right: 24px;
    font-size: 0.9rem;
    display: inline-block;
    margin-bottom: 8px;
}
.friend-links a:hover { color: var(--primary); }

/* 页脚 */
.footer-site {
    border-top: 1px solid var(--border);
    padding: 40px 0;
    background: var(--bg);
    font-size: 0.9rem;
}
.footer-site a { color: #6b6460; margin: 0 12px; }
.footer-site a:hover { color: var(--primary); }

/* 响应式 */
@media (max-width: 991px) {
    .hero-grid { grid-template-columns: 1fr; gap: 30px; }
    .hero-right { border-left: none; padding-left: 0; border-top: 2px solid var(--primary); padding-top: 30px; }
    .navbar-nav .nav-link { border-left: none; padding: 8px 0 !important; border-bottom: 1px solid var(--border); }
    .navbar-collapse { background: var(--bg); padding: 10px 20px; border-top: 1px solid var(--border); }
}

/* --- 子页面追加 --- */
/* 确保Bootstrap组件不出现白底黑字——但本页尽量避免使用组件类, 这里做防御性覆盖 */
        .card, .card-body, .card-title, .card-text,
        .form-control, .form-select, .list-group-item,
        .accordion-item, .accordion-button, .accordion-body {
            background: transparent;
            color: var(--text);
            border-color: var(--border);
        }
/* 让导航高亮当前页 (关于我们) */
        .navbar-custom .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
/* 小卡片样式 */
        .feature-card-mini {
            background: var(--subtle-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 1.25rem;
            height: 100%;
            transition: box-shadow .2s;
        }
.feature-card-mini:hover {
            box-shadow: 0 4px 12px rgba(234, 88, 12, .08);
        }
.feature-card-mini i {
            color: var(--primary);
            font-size: 1.5rem;
            margin-bottom: .5rem;
        }
/* 统计数字样式微调 */
        .stat-number-lg {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
        }
/* 时间线微调 */
        .timeline-item {
            border-left: 2px solid var(--primary);
            padding-left: 1.25rem;
        }
/* 页脚友情链接占位 */
        .footer-links a {
            color: var(--text);
            text-decoration: none;
            margin-right: 1rem;
            font-size: .9rem;
        }
.footer-links a:hover {
            color: var(--primary);
        }
/* 确保标题带品牌特色 */
        .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 3px;
            background: var(--primary);
            margin-top: .5rem;
            border-radius: 2px;
        }

/* --- 子页面追加 --- */
/* 隐私政策页面专属样式 */
        .privacy-hero {
            background: linear-gradient(135deg, var(--bg) 0%, var(--subtle-bg) 100%);
            border-bottom: 1px solid var(--border);
            padding: 4rem 0 3rem;
            position: relative;
            overflow: hidden;
        }
.privacy-hero::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(234, 88, 12, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
.privacy-section {
            padding: 3rem 0;
            border-bottom: 1px solid var(--border);
        }
.privacy-section:last-child {
            border-bottom: none;
        }
.privacy-card {
            background: var(--subtle-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 2rem;
            margin-bottom: 1.5rem;
            transition: box-shadow 0.3s ease;
        }
.privacy-card:hover {
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
        }
.privacy-card h3 {
            color: var(--primary);
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
.privacy-card h3 i {
            font-size: 1.1rem;
            opacity: 0.8;
        }
.privacy-card p, .privacy-card li {
            color: var(--text);
            line-height: 1.8;
            font-size: 0.95rem;
        }
.privacy-card ul {
            padding-left: 1.2rem;
            margin-bottom: 1rem;
        }
.privacy-card ul li {
            margin-bottom: 0.5rem;
            position: relative;
        }
.privacy-card ul li::marker {
            color: var(--accent);
        }
.privacy-highlight {
            background: var(--bg);
            border-left: 4px solid var(--primary);
            padding: 1.2rem 1.5rem;
            border-radius: 0 8px 8px 0;
            margin: 1.5rem 0;
        }
.privacy-highlight p {
            margin-bottom: 0;
            font-style: italic;
            color: var(--text);
        }
.privacy-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            margin: 1.5rem 0;
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid var(--border);
        }
.privacy-table th {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            padding: 0.8rem 1.2rem;
            font-size: 0.9rem;
        }
.privacy-table td {
            padding: 0.8rem 1.2rem;
            border-top: 1px solid var(--border);
            font-size: 0.9rem;
            background: var(--bg);
            color: var(--text);
        }
.privacy-table tr:hover td {
            background: var(--subtle-bg);
        }
.last-updated {
            display: inline-block;
            background: var(--subtle-bg);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 0.4rem 1.2rem;
            font-size: 0.85rem;
            color: var(--text);
            margin-bottom: 1.5rem;
        }
.contact-links {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            margin-top: 1rem;
        }
.contact-links a {
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 1rem;
            border: 1px solid var(--border);
            border-radius: 20px;
            transition: all 0.3s ease;
            background: var(--bg);
        }
.contact-links a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
.privacy-hero {
                padding: 3rem 0 2rem;
            }
.privacy-card {
                padding: 1.5rem;
            }
.privacy-table {
                font-size: 0.8rem;
            }
.privacy-table th, .privacy-table td {
                padding: 0.6rem 0.8rem;
            }

/* --- 子页面追加 --- */
/* 保证Bootstrap组件与站点配色一致 —— 这里只用了栅格，但以防万一覆盖card等 */
        .card, .card-body, .card-title, .card-text, .card-header, .card-footer,
        .form-control, .form-select, .form-label, .input-group-text,
        .list-group-item, .accordion-item, .accordion-button, .accordion-body,
        .modal-content, .dropdown-menu, .dropdown-item {
            background-color: var(--card-bg, #fffbf5);
            color: var(--text, #1c1917);
            border-color: var(--border, #e8e0d4);
        }
/* 为深色背景准备的卡片若存在 */
        .bg-dark .card, .bg-dark .card-body {
            background: rgba(0,0,0,0.2);
            color: #f5efe6;
            border-color: rgba(255,255,255,0.1);
        }
.navbar-brand, .navbar-brand i {
            color: var(--primary) !important;
            font-weight: 700;
        }
/* 条款排版 */
        .terms-section {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 2.2rem 1.8rem;
            margin-bottom: 1.5rem;
            box-shadow: 0 10px 25px rgba(234, 88, 12, 0.04);
        }
.terms-section h2 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--primary);
            border-left: 6px solid var(--accent);
            padding-left: 1rem;
            margin-bottom: 1.2rem;
            letter-spacing: 0.5px;
        }
.terms-section h3 {
            font-size: 1.25rem;
            font-weight: 600;
            color: var(--text);
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
        }
.terms-section p, .terms-section li {
            color: #3f3a36;
            line-height: 1.75;
            font-size: 0.98rem;
        }
.terms-section ul, .terms-section ol {
            padding-left: 1.4rem;
            margin-bottom: 1rem;
        }
.terms-section a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
.terms-section a:hover {
            color: var(--accent);
        }
/* 高亮当前导航 */
        .nav-item .nav-link[href="/terms.html"] {
            color: var(--primary) !important;
            font-weight: 700;
            position: relative;
        }
.nav-item .nav-link[href="/terms.html"]::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 3px;
            background-color: var(--accent);
            border-radius: 3px;
        }
/* 页脚 保持与首页一致 */
        .footer-links a {
            color: var(--text);
            text-decoration: none;
            margin: 0 0.75rem;
            font-size: 0.9rem;
        }
hr {
            border-color: var(--border);
            opacity: 0.4;
        }

/* --- 子页面追加 --- */
.feedback-hero {
            padding: 120px 0 60px;
            background: linear-gradient(135deg, rgba(234, 88, 12, 0.05) 0%, rgba(217, 119, 6, 0.08) 100%);
            border-bottom: 1px solid var(--border);
        }
.feedback-title {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 1rem;
        }
.feedback-subtitle {
            font-size: 1.1rem;
            color: rgba(28, 25, 23, 0.7);
            max-width: 600px;
            line-height: 1.7;
        }
.feedback-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 2rem;
            transition: box-shadow 0.3s ease;
            height: 100%;
        }
.feedback-card:hover {
            box-shadow: 0 8px 30px rgba(234, 88, 12, 0.08);
        }
.feedback-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(234, 88, 12, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
        }
.feedback-icon i {
            font-size: 1.3rem;
            color: var(--primary);
        }
.feedback-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.5rem;
        }
.feedback-card p {
            font-size: 0.9rem;
            color: rgba(28, 25, 23, 0.65);
            line-height: 1.6;
            margin-bottom: 0;
        }
.feedback-form-wrap {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            padding: 2.5rem;
        }
.feedback-form-wrap label {
            font-weight: 600;
            color: var(--text);
            font-size: 0.95rem;
            margin-bottom: 0.4rem;
            display: block;
        }
.feedback-form-wrap input,
        .feedback-form-wrap select,
        .feedback-form-wrap textarea {
            width: 100%;
            padding: 0.7rem 1rem;
            border: 1px solid var(--border);
            border-radius: 8px;
            background: var(--bg);
            color: var(--text);
            font-size: 0.95rem;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
.feedback-form-wrap input:focus,
        .feedback-form-wrap select:focus,
        .feedback-form-wrap textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(234, 88, 12, 0.1);
        }
.feedback-form-wrap textarea {
            min-height: 150px;
            resize: vertical;
        }
.btn-submit {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            transition: background 0.2s ease, transform 0.2s ease;
            cursor: pointer;
        }
.btn-submit:hover {
            background: var(--accent);
            transform: translateY(-2px);
        }
.feedback-info-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1rem 0;
            border-bottom: 1px solid var(--border);
        }
.feedback-info-item:last-child {
            border-bottom: none;
        }
.feedback-info-item i {
            font-size: 1.2rem;
            color: var(--primary);
            margin-top: 0.2rem;
            width: 24px;
            text-align: center;
        }
.feedback-info-item h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 0.2rem;
        }
.feedback-info-item p {
            font-size: 0.9rem;
            color: rgba(28, 25, 23, 0.65);
            line-height: 1.6;
            margin-bottom: 0;
        }
.feedback-tip {
            background: rgba(234, 88, 12, 0.06);
            border-left: 4px solid var(--primary);
            padding: 1rem 1.5rem;
            border-radius: 0 8px 8px 0;
            margin-bottom: 2rem;
        }
.feedback-tip p {
            margin-bottom: 0;
            font-size: 0.95rem;
            color: rgba(28, 25, 23, 0.8);
            line-height: 1.6;
        }
.feedback-tip i {
            color: var(--primary);
            margin-right: 0.5rem;
        }
.feedback-title {
                font-size: 2rem;
            }
.feedback-card {
                padding: 1.5rem;
            }
.feedback-form-wrap {
                padding: 1.5rem;
            }

/* --- Bootstrap 组件配色适配(程序自动补,避免白底黑字) --- */
.accordion-header { background:transparent !important; }