:root {
    --primary: #ea580c;
    --accent: #d97706;
    --bg: #fffbf5;
    --text: #1c1917;
    --border: #1c1917;
    --muted: #78716c;
    --light: #fef3e2;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', 'Source Han Sans CN', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    letter-spacing: 0.02em;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Source Han Serif SC', 'Noto Serif SC', 'Songti SC', Georgia, serif;
    font-weight: 900;
    color: var(--text);
}

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

/* Nav */
.navbar {
    background: var(--bg) !important;
    border-bottom: 2px solid var(--border);
    padding: 0.8rem 0;
}

.navbar-brand {
    font-family: 'Source Han Serif SC', serif;
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--primary) !important;
    letter-spacing: 0.05em;
}

.navbar-nav .nav-link {
    color: var(--text);
    font-weight: 600;
    margin-left: 1rem;
    font-size: 0.95rem;
    position: relative;
}

.navbar-nav .nav-link:hover {
    color: var(--primary);
}

.navbar-toggler {
    border: 2px solid var(--border);
    border-radius: 0;
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* Hero */
.hero {
    padding: 100px 0 80px;
    border-bottom: 2px solid var(--border);
    position: relative;
    overflow: hidden;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-sub {
    font-size: 1.2rem;
    color: var(--muted);
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-stat {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
    margin-top: 2.5rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    font-family: 'Source Han Serif SC', serif;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero-float {
    position: absolute;
    font-size: 2.5rem;
    opacity: 0.3;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
}

/* Sections */
.section {
    padding: 80px 0;
    border-bottom: 2px solid var(--border);
}

.section-title {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 2rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--primary);
}

/* Bento Grid */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
}

.bento-item {
    background: var(--bg);
    border: 2px solid var(--border);
    padding: 28px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.bento-item:hover {
    transform: translateY(-6px);
    box-shadow: 8px 8px 0 var(--primary);
}

.bento-item.large {
    grid-column: span 7;
}

.bento-item.medium {
    grid-column: span 5;
}

.bento-item.small {
    grid-column: span 4;
}

.bento-item.wide {
    grid-column: span 12;
}

.bento-item .icon {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.bento-item h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
}

.bento-item p {
    font-size: 0.9rem;
    color: var(--muted);
}

.bento-item .tag {
    display: inline-block;
    background: var(--light);
    border: 1.5px solid var(--primary);
    padding: 2px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    margin: 4px 4px 0 0;
    border-radius: 20px;
    color: var(--primary);
}

/* Long Intro */
.intro-text {
    max-width: 850px;
    margin: 0 auto;
}

.intro-text p {
    font-size: 1.05rem;
    margin-bottom: 1.2rem;
    color: #292524;
}

.intro-text strong {
    color: var(--primary);
}

/* Numbered List */
.numbered-list {
    counter-reset: list-counter;
    list-style: none;
    padding-left: 0;
}

.numbered-list li {
    counter-increment: list-counter;
    padding: 18px 0 18px 50px;
    border-bottom: 1.5px solid var(--border);
    position: relative;
    font-size: 0.98rem;
}

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

.numbered-list li::before {
    content: counter(list-counter);
    position: absolute;
    left: 0;
    top: 14px;
    width: 34px;
    height: 34px;
    border: 2px solid var(--primary);
    color: var(--primary);
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
}

/* Comparison Table */
.comparison-wrap {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
    min-width: 650px;
}

.comparison-table th {
    background: var(--light);
    padding: 14px 16px;
    text-align: left;
    font-weight: 800;
    border: 2px solid var(--border);
    font-family: 'Source Han Serif SC', serif;
    font-size: 1rem;
}

.comparison-table td {
    padding: 12px 16px;
    border: 2px solid var(--border);
}

.comparison-table tr td:first-child {
    font-weight: 700;
    background: #fefaf0;
}

.comparison-table .fa-check {
    color: var(--primary);
}

.comparison-table .fa-xmark {
    color: #dc2626;
}

.comparison-table .fa-minus {
    color: var(--muted);
}

/* FAQ */
.faq-item {
    border: 2px solid var(--border);
    margin-bottom: 16px;
    background: var(--bg);
}

.faq-question {
    padding: 16px 20px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: 'Source Han Serif SC', serif;
}

.faq-question .faq-toggle {
    transition: transform 0.3s ease;
    color: var(--primary);
}

.faq-item.open .faq-toggle {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    color: var(--muted);
    font-size: 0.92rem;
}

.faq-item.open .faq-answer {
    padding: 0 20px 16px;
    max-height: 300px;
}

/* CTA */
.cta-section {
    padding: 80px 0;
    text-align: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-bottom: 2px solid var(--border);
}

.cta-section h2 {
    color: #fff;
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-section p {
    color: #fff;
    opacity: 0.9;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.cta-btn {
    display: inline-block;
    background: #fff;
    color: var(--primary) !important;
    padding: 14px 40px;
    font-weight: 800;
    font-size: 1.05rem;
    border: 3px solid var(--border);
    transition: all 0.3s ease;
}

.cta-btn:hover {
    background: var(--border);
    color: #fff !important;
}

/* Footer */
.footer {
    background: var(--bg);
    padding: 60px 0 30px;
    border-top: 2px solid var(--border);
}

.footer-brand {
    font-family: 'Source Han Serif SC', serif;
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--primary);
}

.footer-links a {
    display: inline-block;
    margin-right: 20px;
    margin-bottom: 10px;
    color: var(--muted);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--primary);
}

.footer-copyright {
    border-top: 1.5px solid var(--border);
    padding-top: 20px;
    margin-top: 30px;
    font-size: 0.85rem;
    color: var(--muted);
}

/* Friends links */
.friends-links {
    padding: 40px 0;
    border-top: 2px solid var(--border);
    background: var(--bg);
}

.friends-links h4 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

/* Image lazy */
.img-lazy {
    opacity: 0;
    transition: opacity 0.4s ease;
}

.img-lazy.loaded {
    opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .bento-item.large,
    .bento-item.medium,
    .bento-item.small {
        grid-column: span 12;
    }
    .hero { padding: 60px 0 50px; }
    .section { padding: 50px 0; }
    .hero-stat { gap: 1.5rem; }
    .stat-number { font-size: 2rem; }
}

@media (max-width: 576px) {
    body { font-size: 14px; }
    .navbar-brand { font-size: 1.4rem; }
    .section-title { font-size: 1.5rem; }
    .bento-item { padding: 18px; }
}

/* --- 子页面追加 --- */
/* 关于我们页面专属样式 */
        .about-hero {
            padding: 120px 0 80px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
.about-hero h1 {
            font-size: 3rem;
            font-weight: 900;
            margin-bottom: 1.5rem;
            position: relative;
        }
.about-hero h1 span {
            color: var(--primary);
        }
.about-hero .hero-sub {
            max-width: 700px;
            margin: 0 auto;
        }
.about-section {
            padding: 80px 0;
            border-bottom: 1px solid rgba(28,25,23,0.1);
        }
.about-section:last-child {
            border-bottom: none;
        }
.about-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 2rem;
            color: var(--text);
        }
.about-section h2 i {
            color: var(--primary);
            margin-right: 12px;
        }
.about-section p {
            font-size: 1.1rem;
            line-height: 1.8;
            color: var(--text);
            opacity: 0.9;
        }
.about-section .lead-text {
            font-size: 1.2rem;
            font-weight: 500;
            color: var(--primary);
            margin-bottom: 1.5rem;
        }
.value-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
.value-card {
            background: var(--light);
            border: 2px solid var(--border);
            border-radius: 12px;
            padding: 30px;
            transition: transform 0.3s ease;
        }
.value-card:hover {
            transform: translateY(-5px);
        }
.value-card i {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 15px;
        }
.value-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
.value-card p {
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 0;
        }
.timeline {
            position: relative;
            padding: 40px 0;
        }
.timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            width: 3px;
            height: 100%;
            background: var(--primary);
            opacity: 0.3;
        }
.timeline-item {
            display: flex;
            justify-content: flex-end;
            padding: 20px 0;
            width: 50%;
            position: relative;
        }
.timeline-item:nth-child(even) {
            align-self: flex-end;
            justify-content: flex-start;
            margin-left: 50%;
        }
.timeline-item .timeline-content {
            background: var(--light);
            border: 2px solid var(--border);
            border-radius: 12px;
            padding: 20px;
            max-width: 400px;
            margin: 0 20px;
        }
.timeline-item .timeline-year {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }
.timeline-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }
.timeline-item p {
            font-size: 0.9rem;
            margin-bottom: 0;
        }
.feature-list {
            list-style: none;
            padding: 0;
            margin: 20px 0;
        }
.feature-list li {
            padding: 10px 0;
            font-size: 1.05rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }
.feature-list li i {
            color: var(--primary);
        }
.about-hero {
                padding: 80px 0 50px;
            }
.about-hero h1 {
                font-size: 2rem;
            }
.about-section {
                padding: 50px 0;
            }
.about-section h2 {
                font-size: 1.6rem;
            }
.timeline::before {
                left: 30px;
            }
.timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 0;
            }
.timeline-item:nth-child(even) {
                margin-left: 0;
            }
.timeline-item .timeline-content {
                margin: 0;
            }

/* --- 子页面追加 --- */
/* 本页专属样式 —— 服务条款页 */
        .terms-hero {
            padding: 4rem 0 2.5rem;
            border-bottom: 2px solid var(--border);
        }
.terms-hero h1 {
            font-size: 2.4rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
        }
.terms-hero .terms-sub {
            color: var(--muted);
            font-size: 1.05rem;
            max-width: 720px;
        }
.terms-section {
            padding: 2.5rem 0;
            border-bottom: 1px dashed rgba(28, 25, 23, 0.2);
        }
.terms-section:last-of-type {
            border-bottom: none;
        }
.terms-section h2 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
.terms-section h2 i {
            color: var(--primary);
            font-size: 1.3rem;
        }
.terms-section h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin: 1.5rem 0 0.6rem;
            color: var(--primary);
        }
.terms-section p, .terms-section li {
            color: var(--text);
            line-height: 1.8;
            font-size: 0.98rem;
        }
.terms-section ul, .terms-section ol {
            padding-left: 1.5rem;
            margin-bottom: 1rem;
        }
.terms-section li {
            margin-bottom: 0.4rem;
        }
.terms-highlight {
            background: var(--light);
            border-left: 4px solid var(--primary);
            padding: 1rem 1.25rem;
            border-radius: 0 8px 8px 0;
            margin: 1.2rem 0;
            font-size: 0.95rem;
        }
.terms-updated {
            display: inline-block;
            background: var(--primary);
            color: #fff;
            padding: 0.2rem 0.8rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
.terms-index {
            background: var(--light);
            border: 2px solid var(--border);
            border-radius: 12px;
            padding: 1.5rem;
            margin: 1.5rem 0;
        }
.terms-index a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            font-weight: 500;
        }
.terms-index a:hover {
            color: var(--accent);
        }
.terms-hero h1 {
                font-size: 1.8rem;
            }
.terms-section h2 {
                font-size: 1.2rem;
            }

/* --- 子页面追加 --- */
/* 本页专属样式 */
        .privacy-hero {
            background: linear-gradient(135deg, var(--light) 0%, #ffe4cc 100%);
            border-bottom: 3px solid var(--border);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }
.privacy-hero::before {
            content: '🔒';
            position: absolute;
            right: 30px;
            bottom: -20px;
            font-size: 180px;
            opacity: 0.08;
            transform: rotate(-15deg);
        }
.privacy-hero h1 {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--text);
            margin-bottom: 12px;
        }
.privacy-hero p {
            font-size: 1.2rem;
            color: var(--muted);
            max-width: 600px;
        }
.privacy-section {
            padding: 50px 0;
            border-bottom: 2px dashed var(--border);
        }
.privacy-section:last-child {
            border-bottom: none;
        }
.privacy-section h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 3px solid var(--accent);
            display: inline-block;
        }
.privacy-section h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            margin-top: 25px;
            margin-bottom: 12px;
        }
.privacy-section p {
            color: var(--text);
            line-height: 1.8;
            margin-bottom: 15px;
        }
.privacy-list {
            padding-left: 20px;
            margin-bottom: 15px;
        }
.privacy-list li {
            color: var(--text);
            line-height: 1.8;
            margin-bottom: 8px;
            position: relative;
            padding-left: 5px;
        }
.privacy-list li::marker {
            color: var(--primary);
            font-weight: bold;
        }
.highlight-box {
            background: var(--light);
            border-left: 5px solid var(--primary);
            padding: 20px 25px;
            border-radius: 8px;
            margin: 25px 0;
        }
.highlight-box p {
            margin-bottom: 8px;
            color: var(--text);
        }
.highlight-box p:last-child {
            margin-bottom: 0;
        }
.update-date {
            background: var(--text);
            color: var(--bg);
            display: inline-block;
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-top: 20px;
        }
.contact-link {
            color: var(--primary);
            font-weight: 600;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
.contact-link:hover {
            color: var(--accent);
        }
.privacy-hero h1 {
                font-size: 2rem;
            }
.privacy-hero p {
                font-size: 1rem;
            }
.privacy-section h2 {
                font-size: 1.5rem;
            }

/* --- 子页面追加 --- */
/* 免责声明页专属微调 */
        .legal-content { max-width: 860px; margin: 0 auto; padding: 3rem 1rem; }
.legal-section { margin-bottom: 2.5rem; }
.legal-section h2 { 
            color: var(--primary); 
            font-size: 1.4rem; 
            font-weight: 700; 
            margin-bottom: 1rem; 
            border-left: 4px solid var(--accent); 
            padding-left: 1rem; 
        }
.legal-section p, .legal-section li { 
            color: var(--text); 
            line-height: 1.8; 
            font-size: 0.95rem; 
        }
.legal-section ul { padding-left: 1.5rem; }
.legal-section li { margin-bottom: 0.5rem; }
.legal-meta { 
            background: var(--light); 
            border: 1px solid var(--border); 
            border-radius: 8px; 
            padding: 1.2rem; 
            margin-bottom: 2rem; 
            font-size: 0.9rem; 
            color: var(--muted); 
        }
.legal-meta strong { color: var(--primary); }
.back-home { 
            display: inline-block; 
            margin-top: 2rem; 
            padding: 0.6rem 1.5rem; 
            background: var(--primary); 
            color: #fff; 
            border-radius: 6px; 
            text-decoration: none; 
            font-weight: 600; 
            transition: background 0.3s; 
        }
.back-home:hover { background: var(--accent); color: #fff; }

/* --- 子页面追加 --- */
/* 排行榜专属样式 */
        .rank-header {
            background: var(--light);
            border: 2px solid var(--border);
            border-radius: 16px;
            padding: 32px;
            margin-bottom: 40px;
            text-align: center;
        }
.rank-header h1 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }
.rank-header p {
            color: var(--muted);
            margin-bottom: 0;
        }
.rank-tabs {
            display: flex;
            gap: 12px;
            margin-bottom: 32px;
            flex-wrap: wrap;
            justify-content: center;
        }
.rank-tab {
            padding: 10px 24px;
            border: 2px solid var(--border);
            border-radius: 30px;
            background: transparent;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            transition: all .2s;
        }
.rank-tab:hover, .rank-tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
.rank-card {
            background: var(--light);
            border: 2px solid var(--border);
            border-radius: 14px;
            padding: 20px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 20px;
            transition: transform .2s, box-shadow .2s;
        }
.rank-card:hover {
            transform: translateY(-3px);
            box-shadow: 4px 4px 0 var(--border);
        }
.rank-number {
            font-size: 2rem;
            font-weight: 900;
            color: var(--primary);
            min-width: 48px;
            text-align: center;
            font-style: italic;
        }
.rank-info {
            flex: 1;
        }
.rank-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
        }
.rank-meta {
            font-size: .9rem;
            color: var(--muted);
            margin-bottom: 6px;
        }
.rank-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
.rank-tag {
            font-size: .78rem;
            background: var(--light);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 2px 12px;
            color: var(--text);
        }
.rank-score {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--accent);
            text-align: right;
            min-width: 60px;
        }
.rank-change {
            font-size: .85rem;
            color: var(--muted);
            display: block;
            text-align: right;
        }
.rank-up { color: #16a34a; }
.rank-down { color: #dc2626; }
.rank-flat { color: var(--muted); }
.rank-section-title {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text);
            margin: 40px 0 20px;
            padding-left: 16px;
            border-left: 5px solid var(--primary);
        }
.rank-note {
            background: var(--light);
            border: 2px dashed var(--border);
            border-radius: 12px;
            padding: 20px;
            margin: 40px 0;
            font-size: .95rem;
            color: var(--muted);
            line-height: 1.7;
        }
.rank-note strong {
            color: var(--primary);
        }
.rank-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
.rank-number {
                font-size: 1.5rem;
                min-width: auto;
            }
.rank-score {
                text-align: left;
            }