/* 基础变量设置 (轻奢高级配色) */
:root {
    --color-bg: #F7F3EA;        /* 米白背景 */
    --color-primary: #B68D40;   /* 香槟金 */
    --color-primary-hover: #A07B38;
    --color-secondary: #1F2937; /* 深灰 */
    --color-secondary-hover: #111827;
    --color-text: #2D2D2D;      /* 质感黑文字 */
    --color-text-light: #6B7280;
    --color-border: #E5E0D5;    /* 细线边框 */
    --color-white: #FFFFFF;
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    
    --shadow-soft: 0 10px 40px -10px rgba(31, 41, 55, 0.08);
    --shadow-hover: 0 20px 40px -10px rgba(182, 141, 64, 0.15);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

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

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

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    font-weight: 500;
    font-size: 15px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.btn-small {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-large {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    box-shadow: 0 4px 14px 0 rgba(182, 141, 64, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transform: skewX(-20deg);
    transition: left 0.6s cubic-bezier(0.19, 1, 0.22, 1);
}

.btn-primary:hover::after {
    left: 150%;
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(182, 141, 64, 0.5), 0 0 15px rgba(182, 141, 64, 0.3);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--color-border);
    color: var(--color-secondary);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-dark {
    background-color: var(--color-secondary);
    color: var(--color-white);
}

.btn-dark:hover {
    background-color: var(--color-secondary-hover);
    transform: translateY(-2px);
}

/* 导航栏 */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: rgba(247, 243, 234, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 0;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-secondary);
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text-light);
}

.nav-links a:hover, .nav-links a.active {
    color: var(--color-primary);
}

/* 英雄区域 */
.hero {
    padding: 100px 0 80px;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background-color: rgba(182, 141, 64, 0.1);
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.hero-title {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
    color: var(--color-secondary);
}

.hero-desc {
    max-width: 680px;
    margin: 0 auto 40px;
    font-size: 18px;
    color: var(--color-text-light);
}

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

/* 工具矩阵区域 */
.tools-section {
    padding: 60px 0 100px;
    position: relative;
    background-image: radial-gradient(rgba(182, 141, 64, 0.15) 1px, transparent 1px);
    background-size: 24px 24px;
}

/* 顶部遮罩，让网格渐变融入背景 */
.tools-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(180deg, var(--color-bg) 0%, transparent 15%, transparent 85%, var(--color-bg) 100%);
    pointer-events: none;
    z-index: 0;
}

.section-header {
    position: relative;
    z-index: 1;
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--color-text-light);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
}

/* 工具卡片 */
.tool-card {
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.tool-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 25px 50px -12px rgba(182, 141, 64, 0.2), 0 0 20px rgba(182, 141, 64, 0.05);
    border-color: rgba(182, 141, 64, 0.4);
    z-index: 2;
}

/* 悬浮时的顶部赛博发光线 */
.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-primary), #fff, var(--color-primary), transparent);
    background-size: 200% 100%;
    opacity: 0;
    transition: var(--transition);
}

.tool-card:hover::before {
    opacity: 1;
    animation: gradientMove 2s linear infinite;
}

@keyframes gradientMove {
    0% { background-position: 100% 0; }
    100% { background-position: -100% 0; }
}

.tool-icon {
    font-size: 40px;
    margin-bottom: 24px;
    display: inline-block;
    padding: 16px;
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    width: max-content;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    /* 增加持续的呼吸浮动动画 */
    animation: continuousFloat 3s ease-in-out infinite alternate;
}

/* 打乱每个图标的浮动频率，让画面看起来更自然、生动 */
.tool-card:nth-child(1) .tool-icon { animation-delay: 0s; animation-duration: 3.2s; }
.tool-card:nth-child(2) .tool-icon { animation-delay: -1.5s; animation-duration: 2.8s; }
.tool-card:nth-child(3) .tool-icon { animation-delay: -0.8s; animation-duration: 3.5s; }
.tool-card:nth-child(4) .tool-icon { animation-delay: -2s; animation-duration: 3.0s; }
.tool-card:nth-child(5) .tool-icon { animation-delay: -0.4s; animation-duration: 3.8s; }
.tool-card:nth-child(6) .tool-icon { animation-delay: -1.2s; animation-duration: 3.1s; }

@keyframes continuousFloat {
    0% { 
        transform: translateY(0); 
        box-shadow: 0 4px 10px rgba(182, 141, 64, 0.05);
    }
    100% { 
        transform: translateY(-8px); 
        box-shadow: 0 15px 25px rgba(182, 141, 64, 0.12);
    }
}

.tool-card:hover .tool-icon {
    /* 鼠标悬停时接管动画 */
    animation: none;
    transform: translateY(-12px) scale(1.15) rotate(5deg);
    box-shadow: 0 15px 30px rgba(182, 141, 64, 0.2);
}

.tool-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-secondary);
}

.tool-desc {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 24px;
    flex-grow: 1;
}

.tool-meta {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}

.tag {
    font-size: 12px;
    padding: 4px 10px;
    background-color: var(--color-bg);
    color: var(--color-text-light);
    border-radius: 4px;
    border: 1px solid var(--color-border);
}

.tool-btn {
    width: 100%;
}

/* 页脚 */
.footer {
    border-top: 1px solid var(--color-border);
    padding: 40px 0;
    margin-top: 60px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--color-text-light);
}

.footer-links {
    display: flex;
    gap: 24px;
}

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

/* 权威榜单区域 */
.ranking-section {
    padding: 60px 0 100px;
    background-color: var(--color-bg);
}

.top5-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 60px;
}

.top-card {
    display: flex;
    align-items: center;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.top-card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(182, 141, 64, 0.3);
}

.rank-badge {
    font-size: 28px;
    font-weight: 700;
    width: 80px;
    flex-shrink: 0;
}

.rank-badge.gold { color: #D4AF37; }
.rank-badge.silver { color: #A8A9AD; }
.rank-badge.bronze { color: #CD7F32; }
.rank-badge.normal { color: var(--color-text-light); font-size: 24px; }

.top-card-content {
    flex-grow: 1;
    padding: 0 24px;
    border-left: 1px solid var(--color-border);
}

.top-card .airport-name {
    font-size: 22px;
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: 8px;
}

.top-card .airport-desc {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 12px;
    max-width: 650px;
}

.top-card .airport-tags {
    display: flex;
    gap: 8px;
}

.top-card-action {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 12px;
    min-width: 160px;
    flex-shrink: 0;
}

.price {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
}

.price span {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-text-light);
}

.other-airports-section {
    background: rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-md);
    padding: 32px;
    border: 1px dashed var(--color-border);
}

.other-title {
    font-size: 18px;
    color: var(--color-secondary);
    margin-bottom: 8px;
}

.other-desc {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 24px;
}

.other-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.airport-pill {
    font-size: 13px;
    color: var(--color-text-light);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    padding: 6px 14px;
    border-radius: 100px;
    transition: var(--transition);
    cursor: default;
}

.airport-pill:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

/* 友链 / 推荐阅读 */
.friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
    font-size: 14px;
    color: var(--color-text-light);
}

.friend-links-title {
    font-weight: 500;
    color: var(--color-secondary);
}

.friend-links a {
    color: var(--color-text-light);
    transition: var(--transition);
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .top-card {
        flex-direction: column;
        align-items: flex-start;
        padding: 24px;
    }
    .rank-badge {
        margin-bottom: 16px;
    }
    .top-card-content {
        padding: 0;
        border-left: none;
        margin-bottom: 24px;
    }
    .top-card-action {
        width: 100%;
        align-items: flex-start;
    }
    .hero-title {
        font-size: 36px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .nav-links {
        display: none; /* 移动端简化导航栏 */
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

/* 智能匹配器弹窗样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(31, 41, 55, 0.6);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: var(--color-bg);
    width: 90%;
    max-width: 500px;
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    position: relative;
    overflow: hidden;
    transform: translateY(20px) scale(0.95);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    color: var(--color-text-light);
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--color-bg);
    color: var(--color-secondary);
}

.step-pane {
    display: none;
    padding: 40px;
    text-align: center;
}

.step-pane.active {
    display: block;
    animation: fadeInRight 0.4s ease forwards;
}

@keyframes fadeInRight {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

.step-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: 8px;
}

.step-desc {
    color: var(--color-text-light);
    margin-bottom: 32px;
    font-size: 14px;
}

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

.options-grid.full {
    grid-template-columns: 1fr;
}

.option-btn {
    background: var(--color-white);
    border: 2px solid var(--color-border);
    padding: 16px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    color: var(--color-secondary);
}

.option-btn:hover {
    border-color: rgba(182, 141, 64, 0.5);
    transform: translateY(-2px);
}

.option-btn.selected {
    border-color: var(--color-primary);
    background: rgba(182, 141, 64, 0.05);
    box-shadow: 0 4px 12px rgba(182, 141, 64, 0.15);
}

.loading-box {
    padding: 60px 40px;
}

.spinner {
    font-size: 48px;
    margin-bottom: 24px;
    display: inline-block;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.7; }
    50% { transform: scale(1.1); opacity: 1; text-shadow: 0 0 20px var(--color-primary); }
    100% { transform: scale(0.9); opacity: 0.7; }
}

.progress-bar {
    height: 6px;
    background: var(--color-border);
    border-radius: 3px;
    margin-top: 24px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--color-primary);
    width: 0%;
    transition: width 0.5s ease;
}

.result-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--color-primary);
    color: white;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 16px;
}

.result-name {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 16px;
}

.result-desc {
    color: var(--color-text);
    margin-bottom: 32px;
    line-height: 1.6;
}

/* 机场黄页分类网格 */
.directory-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-top: 24px;
}

.directory-group {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.02);
}

.dir-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px dashed var(--color-border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.dir-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.dir-link {
    display: inline-block;
    padding: 6px 12px;
    background: var(--color-bg);
    border: 1px solid transparent;
    border-radius: 4px;
    font-size: 13px;
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
}

.dir-link:hover {
    background: rgba(182, 141, 64, 0.1);
    color: var(--color-primary);
    border-color: rgba(182, 141, 64, 0.3);
    transform: translateY(-2px);
}

/* 排行榜分栏布局与右侧目录 */
.ranking-layout {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.ranking-main {
    flex: 1;
    min-width: 0;
}

.ranking-sidebar {
    width: 280px;
    flex-shrink: 0;
    position: sticky;
    top: 100px;
}

.toc-box {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.02);
}

.toc-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 8px;
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toc-link {
    display: block;
    color: var(--color-text-light);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
    padding-left: 12px;
    position: relative;
}

.toc-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background: var(--color-border);
    border-radius: 50%;
    transition: var(--transition);
}

.toc-link:hover, .toc-link.active {
    color: var(--color-primary);
    font-weight: 600;
}

.toc-link:hover::before, .toc-link.active::before {
    background: var(--color-primary);
    height: 12px;
    border-radius: 2px;
}

@media (max-width: 900px) {
    .ranking-layout {
        flex-direction: column;
    }
    .ranking-sidebar {
        width: 100%;
        position: static;
        margin-bottom: 40px;
    }
}

/* 教程区域 */
.tutorials-section {
    padding: 80px 0;
    background-color: var(--color-white);
    position: relative;
}

.tutorials-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-light);
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.tab-btn.active {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
    box-shadow: 0 4px 15px rgba(182, 141, 64, 0.3);
}

.tutorials-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    min-height: 200px;
}

.tutorial-panel {
    display: none;
    animation: fadeInScale 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.tutorial-panel.active {
    display: block;
}

@keyframes fadeInScale {
    from { opacity: 0; transform: translateY(15px) scale(0.98); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.tut-card-inner {
    background: var(--color-bg);
    border: 1px solid rgba(182, 141, 64, 0.2);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    align-items: center;
    gap: 24px;
    box-shadow: inset 0 0 40px rgba(255,255,255,0.5), 0 10px 30px rgba(182, 141, 64, 0.05);
}

.tut-icon {
    font-size: 56px;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    border-radius: 50%;
    box-shadow: 0 8px 20px rgba(0,0,0,0.05);
    flex-shrink: 0;
}

.tut-info {
    flex-grow: 1;
}

.tut-info h3 {
    font-size: 22px;
    color: var(--color-secondary);
    margin-bottom: 12px;
}

.tut-info p {
    color: var(--color-text);
    line-height: 1.6;
    margin-bottom: 16px;
}

.tut-meta {
    display: flex;
    gap: 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
}

.tut-meta span {
    background: rgba(182, 141, 64, 0.1);
    padding: 4px 10px;
    border-radius: 4px;
}

@media (max-width: 768px) {
    .tut-card-inner {
        flex-direction: column;
        text-align: center;
        padding: 24px;
    }
    .tut-meta {
        justify-content: center;
    }
}