/* ===== 梯子游戏 - 玻璃质感 + 未来科技风 ===== */
@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Noto+Sans+SC:wght@300;400;700&display=swap');

:root {
    --primary: #00d4ff;
    --primary-dark: #0099cc;
    --accent: #a855f7;
    --accent-glow: #c084fc;
    --bg-deep: #0a0a1a;
    --bg-mid: #0f0f2e;
    --glass-bg: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-hover: rgba(255, 255, 255, 0.08);
    --text: #e0e0f0;
    --text-dim: #8888aa;
    --success: #00ff88;
    --warning: #ffaa00;
    --danger: #ff4466;
}

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

body {
    font-family: 'Noto Sans SC', -apple-system, sans-serif;
    background: var(--bg-deep);
    color: var(--text);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
}

/* ===== 粒子背景 ===== */
#particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ===== 玻璃态 ===== */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--glass-border);
}

.glass-card {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 20px;
    padding: 40px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.glass-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.03), transparent);
    transition: left 0.6s;
}

.glass-card:hover::before {
    left: 100%;
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
    box-shadow: 0 8px 40px rgba(0, 212, 255, 0.1);
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0 40px;
    height: 70px;
    transition: all 0.3s;
}

.navbar.scrolled {
    background: rgba(10, 10, 26, 0.85) !important;
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text);
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.logo-text {
    font-family: 'Orbitron', monospace;
    font-size: 1.3rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-link {
    color: var(--text-dim);
    text-decoration: none;
    padding: 8px 18px;
    border-radius: 10px;
    font-size: 0.92rem;
    transition: all 0.3s;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background: rgba(0, 212, 255, 0.08);
}

.ai-btn {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.12), rgba(168, 85, 247, 0.12));
    border: 1px solid rgba(0, 212, 255, 0.25);
    color: var(--primary) !important;
    font-weight: 600;
}

.ai-btn:hover {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.22), rgba(168, 85, 247, 0.22)) !important;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

.ai-icon {
    animation: pulse 2s infinite;
}

/* ===== 主页 Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 20px 60px;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 700px;
}

.hero-logo {
    width: 90px;
    height: 90px;
    margin-bottom: 20px;
    filter: drop-shadow(0 0 30px rgba(0, 212, 255, 0.3));
}

.hero-title {
    font-family: 'Orbitron', monospace;
    font-size: 3rem;
    margin-bottom: 16px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--accent), var(--accent-glow));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text);
    margin-bottom: 12px;
    letter-spacing: 4px;
}

.hero-desc {
    color: var(--text-dim);
    font-size: 1rem;
    margin-bottom: 40px;
}

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

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 14px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(0, 212, 255, 0.5);
}

.btn-glass {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text);
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

/* ===== 特性卡片 ===== */
.features {
    padding: 60px 20px 100px;
    position: relative;
    z-index: 1;
}

.features-grid {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.feature-card {
    text-align: center;
    padding: 36px 24px;
}

.feature-card.highlight {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(168, 85, 247, 0.06));
    border-color: rgba(0, 212, 255, 0.2);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--text);
}

.feature-card p {
    color: var(--text-dim);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.card-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
}

.card-link:hover {
    color: var(--accent-glow);
}

/* ===== 页面 Hero ===== */
.page-hero {
    padding: 140px 20px 40px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.page-hero-card {
    display: inline-block;
    max-width: 600px;
}

.page-subtitle {
    color: var(--text-dim);
    margin-top: 12px;
    font-size: 1.05rem;
}

/* ===== 内容区域 ===== */
.content-section {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px 80px;
    position: relative;
    z-index: 1;
}

/* ===== 技巧列表 ===== */
.tips-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.tip-item {
    display: flex;
    gap: 24px;
    padding: 24px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

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

.tip-number {
    font-family: 'Orbitron', monospace;
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-width: 50px;
}

.tip-content h3 {
    color: var(--text);
    margin-bottom: 8px;
    font-size: 1.1rem;
}

.tip-content p {
    color: var(--text-dim);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ===== 规则页面 ===== */
.rule-section {
    margin-bottom: 40px;
}

.rule-section:last-child {
    margin-bottom: 0;
}

.rule-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.rule-header h2 {
    font-size: 1.3rem;
    color: var(--text);
}

.rule-icon {
    font-size: 1.5rem;
}

.rule-list li {
    color: var(--text-dim);
    padding: 10px 0;
    padding-left: 24px;
    position: relative;
    list-style: none;
    font-size: 0.95rem;
}

.rule-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary);
}

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

.step {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.step-num {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.step-info h4 {
    color: var(--text);
    margin-bottom: 4px;
}

.step-info p {
    color: var(--text-dim);
    font-size: 0.9rem;
}

/* ===== 警告 ===== */
.warnings {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.warning-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 18px;
    background: rgba(255, 170, 0, 0.06);
    border: 1px solid rgba(255, 170, 0, 0.15);
    border-radius: 12px;
}

.warn-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.warning-item p {
    color: #ffcc88;
    font-size: 0.9rem;
}

/* ===== 说明页面 ===== */
.about-content h2 {
    color: var(--text);
    margin: 30px 0 14px;
    font-size: 1.25rem;
}

.about-content h2:first-child {
    margin-top: 0;
}

.about-content p,
.about-content li {
    color: var(--text-dim);
    font-size: 0.95rem;
    line-height: 1.8;
}

.about-content ul {
    padding-left: 20px;
}

.about-content ul li {
    margin-bottom: 6px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin: 16px 0;
}

.mini-card {
    background: rgba(255, 255, 255, 0.025);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 14px;
    padding: 20px;
    text-align: center;
}

.mini-icon {
    font-size: 1.8rem;
    margin-bottom: 8px;
    display: block;
}

.mini-card h4 {
    color: var(--text);
    margin-bottom: 6px;
    font-size: 0.95rem;
}

.mini-card p {
    color: var(--text-dim);
    font-size: 0.82rem;
}

/* ===== AI 预测页面 ===== */
.predict-panel {
    max-width: 700px;
    margin: 0 auto;
}

.predict-header {
    text-align: center;
    margin-bottom: 30px;
}

.predict-header h2 {
    color: var(--text);
    margin-bottom: 8px;
}

.predict-header p {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.data-input {
    width: 100%;
    min-height: 160px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    padding: 16px;
    color: var(--text);
    font-family: monospace;
    font-size: 0.9rem;
    resize: vertical;
    transition: border-color 0.3s;
}

.data-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.08);
}

.predict-actions {
    display: flex;
    gap: 12px;
    margin: 24px 0;
    justify-content: center;
}

.predict-btn {
    position: relative;
    overflow: hidden;
}

.pulse-dot {
    width: 10px;
    height: 10px;
    background: var(--success);
    border-radius: 50%;
    display: inline-block;
    animation: pulse-dot 1.5s infinite;
}

.predict-result {
    margin-top: 30px;
    padding: 30px;
}

.result-header {
    text-align: center;
    margin-bottom: 20px;
}

.result-header h3 {
    color: var(--text);
    font-size: 1.15rem;
}

.result-body {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.result-label {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.result-value {
    font-family: 'Orbitron', monospace;
    font-weight: 700;
    color: var(--text);
    font-size: 1.1rem;
}

.result-value.highlight {
    color: var(--primary);
    font-size: 1.2rem;
}

.disclaimer {
    text-align: center;
    color: var(--warning);
    font-size: 0.8rem;
    margin-top: 16px;
}

/* ===== 文章正文 ===== */
.section-title {
    font-family: 'Orbitron', monospace;
    font-size: 1.4rem;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.article-body {
    color: var(--text-dim);
    line-height: 1.9;
}

.article-body h2 {
    color: var(--text);
    margin: 30px 0 14px;
    font-size: 1.3rem;
}

.article-body h3 {
    color: var(--text);
    margin: 22px 0 10px;
    font-size: 1.1rem;
}

.article-body p {
    margin-bottom: 14px;
    font-size: 0.95rem;
}

.article-body strong {
    color: var(--text);
}

.article-body ul, .article-body ol {
    margin: 12px 0 16px 20px;
}

.article-body li {
    margin-bottom: 8px;
    font-size: 0.95rem;
    color: var(--text-dim);
    line-height: 1.7;
}

.article-body ol li {
    padding-left: 4px;
}

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

.article-body a:hover {
    text-decoration: underline;
}

/* ===== 规则表格 ===== */
.rule-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 0.9rem;
}

.rule-table th {
    background: rgba(0, 212, 255, 0.08);
    color: var(--primary);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid rgba(0, 212, 255, 0.15);
    font-size: 0.85rem;
}

.rule-table td {
    padding: 14px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--text-dim);
    line-height: 1.5;
}

.rule-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

.rule-table td:first-child {
    color: var(--text);
    white-space: nowrap;
}

/* ===== CTA Box ===== */
.cta-box {
    padding: 30px;
    text-align: center;
}

.cta-box h3 {
    color: var(--text);
    margin-bottom: 8px;
}

.cta-box p {
    color: var(--text-dim);
}

/* ===== 页脚增强 ===== */
.footer {
    padding: 0;
    color: var(--text-dim);
    font-size: 0.85rem;
    position: relative;
    z-index: 1;
    margin-top: 60px;
}

.footer-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 24px 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-col h4 {
    color: var(--text);
    margin-bottom: 12px;
    font-size: 1rem;
}

.footer-col p {
    color: var(--text-dim);
    font-size: 0.85rem;
    line-height: 1.6;
}

.footer-col a {
    display: block;
    color: var(--text-dim);
    text-decoration: none;
    padding: 4px 0;
    font-size: 0.85rem;
    transition: color 0.2s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* ===== 动画 ===== */
@keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

@keyframes pulse-dot {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 255, 136, 0.4); }
    50% { box-shadow: 0 0 0 10px rgba(0, 255, 136, 0); }
}

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

.hero-logo {
    animation: float 3s ease-in-out infinite;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .navbar {
        padding: 0 16px;
        height: 60px;
    }

    .nav-menu {
        gap: 2px;
    }

    .nav-link {
        padding: 6px 10px;
        font-size: 0.78rem;
    }

    .logo-text {
        font-size: 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
        letter-spacing: 2px;
    }

    .glass-card {
        padding: 24px;
    }

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