/* ==========================================================================
   肥猫云机场 (FatCatCloud.cyou) - 核心样式表
   主题风格：Magical Cyber Neon (魔幻霓虹与曜石黑)
   特点：高级感、魔幻深渊蓝背景、极光霓虹星云、发光3D玻璃态卡片、完美移动端适配
   ========================================================================== */

/* 引入 Google 字体 */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Noto+Sans+SC:wght@300;400;500;700;900&display=swap');

:root {
    /* 核心色彩定义 */
    --bg-dark: #07060f;
    --bg-card: rgba(18, 17, 30, 0.65);
    --bg-card-hover: rgba(26, 24, 42, 0.85);
    
    --primary: #ff8c00;
    --primary-hover: #ff5722;
    --primary-glow: rgba(255, 140, 0, 0.35);
    
    --neon-cyan: #00f2fe;
    --neon-cyan-glow: rgba(0, 242, 254, 0.3);
    --neon-magenta: #e100ff;
    --neon-magenta-glow: rgba(225, 0, 255, 0.25);
    --neon-green: #39ff14;
    --neon-green-glow: rgba(57, 255, 20, 0.2);
    
    --text-primary: #f3f4f6;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    
    --border-color: rgba(255, 255, 255, 0.05);
    --border-hover: rgba(0, 242, 254, 0.3);
    
    --font-sans: 'Outfit', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    
    --transition-fast: 0.1s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-normal: 0.25s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-slow: 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
    
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 12px 36px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.8);
    --shadow-glow: 0 0 20px var(--neon-cyan-glow);
}

/* 基础重置 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* ==========================================================================
   魔幻背景星云 (Nebula Background)
   ========================================================================== */
body::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    top: -100px;
    left: -100px;
    background: radial-gradient(circle, var(--neon-cyan-glow) 0%, rgba(7,6,15,0) 70%);
    filter: blur(120px);
    z-index: -1;
    pointer-events: none;
}

body::after {
    content: '';
    position: absolute;
    width: 700px;
    height: 700px;
    top: 150px;
    right: -200px;
    background: radial-gradient(circle, var(--neon-magenta-glow) 0%, rgba(7,6,15,0) 70%);
    filter: blur(140px);
    z-index: -1;
    pointer-events: none;
    opacity: 0.8;
}

.nebula-bottom {
    position: absolute;
    width: 800px;
    height: 800px;
    bottom: 5%;
    left: -200px;
    background: radial-gradient(circle, rgba(255, 140, 0, 0.08) 0%, rgba(7,6,15,0) 70%);
    filter: blur(150px);
    z-index: -1;
    pointer-events: none;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: #1c1a2e;
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--neon-cyan);
    box-shadow: 0 0 10px var(--neon-cyan);
}

/* 链接样式 */
a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-fast);
}

/* 排版系统 */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: #ffffff;
    letter-spacing: -0.01em;
}

/* 渐变文本 */
.gradient-text-gold {
    background: linear-gradient(135deg, #fff 0%, #ff8c00 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 2rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: var(--transition-normal);
    border: 1px solid transparent;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, #ff9f43 0%, #ff5252 100%);
    color: #ffffff;
    box-shadow: 0 4px 20px rgba(255, 82, 82, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 82, 82, 0.6), 0 0 15px rgba(255, 159, 67, 0.4);
    background: linear-gradient(135deg, #ffa852 0%, #ff6161 100%);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.04);
    color: #ffffff;
    border-color: var(--border-color);
    backdrop-filter: blur(12px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--neon-cyan);
    box-shadow: 0 0 12px rgba(0, 242, 254, 0.2);
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.5rem 1.2rem;
    font-size: 0.85rem;
    border-radius: 8px;
}

/* 容器定义 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ==========================================================================
   组件: 头部导航 (Header)
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(7, 6, 15, 0.7);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    transition: var(--transition-normal);
}

.header-active {
    padding: 0.5rem 0;
    background: rgba(6, 5, 12, 0.9);
    border-bottom: 1px solid rgba(0, 242, 254, 0.15);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 75px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.4rem;
    font-weight: 800;
    color: #ffffff;
}

.logo-dot {
    color: var(--neon-cyan);
    font-size: 1.8rem;
    line-height: 1;
    text-shadow: 0 0 8px var(--neon-cyan);
}

.logo-img {
    height: 32px;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-secondary);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--neon-cyan);
    box-shadow: 0 0 8px var(--neon-cyan);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: #ffffff;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    background: none;
    border: none;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: #ffffff;
    transition: var(--transition-fast);
}

/* ==========================================================================
   页面组件: 面包屑 (Breadcrumbs)
   ========================================================================== */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.breadcrumbs a {
    color: var(--text-secondary);
}

.breadcrumbs a:hover {
    color: var(--neon-cyan);
}

.breadcrumbs span {
    color: var(--text-muted);
}

/* ==========================================================================
   页面组件: 魔幻首屏卡片 (Hero Card Detail Layout)
   ========================================================================== */
.hero-detail-section {
    padding: 130px 0 50px 0;
    position: relative;
}

.hero-card-grid {
    display: grid;
    grid-template-columns: 7.5fr 4.5fr;
    gap: 2.5rem;
    align-items: start;
    margin-bottom: 2.5rem;
}

/* 左侧信息区 */
.info-main-card {
    display: flex;
    flex-direction: column;
}

.airport-brand-row {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.airport-avatar {
    width: 72px;
    height: 72px;
    border-radius: 20px;
    background: linear-gradient(135deg, #ff2a85 0%, #ff7300 100%);
    box-shadow: 0 8px 24px rgba(255, 42, 133, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    font-weight: 800;
    color: #ffffff;
    flex-shrink: 0;
}

.airport-title-block {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.airport-title-row {
    display: flex;
    align-items: baseline;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.airport-title-row h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: #ffffff;
}

.airport-en-title {
    font-size: 1.3rem;
    color: var(--text-muted);
    font-weight: 500;
}

.title-badges-row {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.badge-tag {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.7rem;
    border-radius: 6px;
}

.badge-tag-cyan {
    background: rgba(0, 242, 254, 0.1);
    color: var(--neon-cyan);
    border: 1px solid rgba(0, 242, 254, 0.2);
}

.badge-tag-pink {
    background: rgba(225, 0, 255, 0.1);
    color: var(--neon-magenta);
    border: 1px solid rgba(225, 0, 255, 0.2);
}

.badge-tag-orange {
    background: rgba(255, 140, 0, 0.1);
    color: #ffbe1a;
    border: 1px solid rgba(255, 140, 0, 0.2);
}

.airport-summary-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

/* 一句话点评盒子 */
.review-highlights-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-left: 3px solid var(--neon-cyan);
    box-shadow: -5px 0 15px rgba(0, 242, 254, 0.08);
    border-radius: 4px 12px 12px 4px;
    padding: 1.5rem 1.8rem;
    margin-bottom: 2rem;
    backdrop-filter: blur(8px);
}

.review-highlights-box p {
    font-size: 0.95rem;
    color: #cbd5e1;
    line-height: 1.7;
}

.review-highlights-box strong {
    color: var(--neon-cyan);
}

/* 功能协议标签组 */
.tech-pills-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.tech-pill {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
    padding: 0.4rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.tech-pill:hover {
    border-color: var(--neon-cyan);
    color: #ffffff;
    box-shadow: 0 0 10px rgba(0, 242, 254, 0.15);
    background: rgba(0, 242, 254, 0.03);
}

.tech-pill.active-pill {
    color: #39ff14;
    border-color: rgba(57, 255, 20, 0.3);
    background: rgba(57, 255, 20, 0.04);
}

.tech-pill.active-pill:hover {
    border-color: #39ff14;
    box-shadow: 0 0 10px rgba(57, 255, 20, 0.2);
}

/* 右侧订阅卡片 */
.subscribe-floating-card {
    background: rgba(18, 17, 30, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 24px;
    padding: 2.2rem 2rem;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(127, 0, 255, 0.08);
    position: relative;
    overflow: hidden;
}

.subscribe-floating-card::after {
    content: '';
    position: absolute;
    width: 150px;
    height: 150px;
    background: radial-gradient(circle, rgba(225, 0, 255, 0.1) 0%, transparent 60%);
    top: -50px;
    right: -50px;
    pointer-events: none;
}

.card-price-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-price-row {
    display: flex;
    align-items: baseline;
    gap: 0.3rem;
    margin-bottom: 1.5rem;
}

.card-price-currency {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
}

.card-price-val {
    font-size: 3rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 1;
}

.card-price-unit {
    font-size: 0.95rem;
    color: #39ff14;
    font-weight: 600;
}

.card-mini-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.mini-badge {
    border: 1px solid rgba(57, 255, 20, 0.25);
    color: #39ff14;
    background: rgba(57, 255, 20, 0.03);
    font-size: 0.75rem;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-weight: 500;
}

.card-cta-btn {
    width: 100%;
    padding: 0.9rem;
    margin-bottom: 1rem;
    font-size: 1rem;
}

.card-sec-btn {
    width: 100%;
    padding: 0.9rem;
    margin-bottom: 2rem;
    font-size: 1rem;
}

/* 优惠码复制盒 */
.coupon-code-box {
    margin-top: 1.5rem;
}

.coupon-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 0.5rem;
    display: block;
}

.coupon-input-wrapper {
    display: flex;
    background: #0d0c18;
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    overflow: hidden;
    height: 48px;
    align-items: center;
    padding: 0 0.5rem 0 1rem;
    transition: var(--transition-fast);
}

.coupon-input-wrapper:focus-within {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 8px rgba(0, 242, 254, 0.2);
}

.coupon-value {
    background: none;
    border: none;
    outline: none;
    color: #39ff14;
    font-family: monospace;
    font-size: 1.1rem;
    font-weight: 700;
    flex-grow: 1;
    width: 100%;
}

.coupon-copy-btn {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.coupon-copy-btn:hover {
    background: var(--neon-cyan);
    border-color: var(--neon-cyan);
    color: #000000;
}

.coupon-tips {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-align: center;
    margin-top: 1.2rem;
    line-height: 1.4;
}

/* ==========================================================================
   页面组件: 技术参数对比表格 (Detail Grid Table)
   ========================================================================== */
.airport-spec-grid {
    background: rgba(18, 17, 30, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 20px;
    overflow: hidden;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    margin-bottom: 4rem;
    backdrop-filter: blur(10px);
}

.spec-item {
    padding: 1.8rem 2.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.spec-item:nth-child(odd) {
    border-right: 1px solid rgba(255, 255, 255, 0.03);
}

.spec-item:nth-last-child(-n+2) {
    border-bottom: none;
}

.spec-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.spec-val {
    font-size: 1.15rem;
    font-weight: 700;
    color: #ffffff;
}

/* ==========================================================================
   组件: 3D 魔幻卡片交互核心样式 (3D Interactive Tilt Cards)
   ========================================================================== */
.tilt-3d {
    position: relative;
    transform-style: preserve-3d;
    backface-visibility: hidden;
    transition: transform 0.15s ease-out, box-shadow 0.25s ease-out, border-color 0.25s ease-out;
}

.tilt-3d:hover {
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.8), 0 0 25px rgba(0, 242, 254, 0.12);
    border-color: rgba(0, 242, 254, 0.4);
}

/* 浮空视差层 (Parallax Layers inside tilt cards) */
.tilt-3d .feature-icon-wrapper,
.tilt-3d .plan-name,
.tilt-3d .plan-price-box {
    transform: translateZ(35px);
    transition: transform 0.25s ease;
}

.tilt-3d .plan-features,
.tilt-3d .feature-card p,
.tilt-3d .feature-card h3 {
    transform: translateZ(20px);
}

.tilt-3d .btn {
    transform: translateZ(30px);
}

/* 光影反射图层 overlay */
.shine-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: inherit;
    pointer-events: none;
    z-index: 5;
    mix-blend-mode: overlay;
    transition: background 0.15s ease-out;
}

/* 3D 霓虹流光边框 (3D Laser Border Effects) */
.pricing-card.popular.tilt-3d {
    border-width: 1.5px;
    box-shadow: 0 15px 40px rgba(0, 242, 254, 0.15);
    border-color: var(--neon-cyan);
    animation: popular-glow 6s infinite alternate;
}

@keyframes popular-glow {
    0% {
        box-shadow: 0 15px 35px rgba(0, 242, 254, 0.15), 0 0 10px rgba(0, 242, 254, 0.2);
        border-color: var(--neon-cyan);
    }
    50% {
        box-shadow: 0 15px 45px rgba(225, 0, 255, 0.15), 0 0 20px rgba(225, 0, 255, 0.2);
        border-color: var(--neon-magenta);
    }
    100% {
        box-shadow: 0 15px 35px rgba(57, 255, 20, 0.15), 0 0 10px rgba(57, 255, 20, 0.2);
        border-color: var(--neon-green);
    }
}

/* 推荐首选发光徽章 3D 悬浮 */
.pricing-card.popular.tilt-3d::before {
    transform: translateZ(40px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    z-index: 10;
}

/* 价格发光阴影 */
.price-amount {
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.15);
}

.popular .price-amount {
    text-shadow: 0 0 20px rgba(0, 242, 254, 0.4);
}

/* ==========================================================================
   组件: 核心优势 (Features)
   ========================================================================== */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

.section-header p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.5rem 2rem;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 10% 10%, rgba(0, 242, 254, 0.03) 0%, rgba(0,0,0,0) 50%);
    pointer-events: none;
}

.feature-icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: rgba(0, 242, 254, 0.08);
    border: 1px solid rgba(0, 242, 254, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--neon-cyan);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==========================================================================
   组件: 订阅套餐 (Pricing)
   ========================================================================== */
.pricing-toggle-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    margin-bottom: 3.5rem;
}

.toggle-label {
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
}

.toggle-label.active {
    color: var(--neon-cyan);
}

.toggle-switch {
    position: relative;
    width: 60px;
    height: 30px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 100px;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

.toggle-slider {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    background: var(--neon-cyan);
    box-shadow: 0 0 8px var(--neon-cyan);
    border-radius: 50%;
    transition: var(--transition-normal);
}

.toggle-checkbox {
    display: none;
}

.toggle-checkbox:checked + .toggle-switch .toggle-slider {
    left: 33px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    align-items: stretch;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 3rem 2rem 2.5rem 2rem;
    transition: var(--transition-normal);
    position: relative;
    display: flex;
    flex-direction: column;
}

.plan-name {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #ffffff;
}

.plan-desc {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 2rem;
}

.plan-price-box {
    margin-bottom: 2.5rem;
    display: flex;
    align-items: baseline;
    gap: 0.25rem;
}

.price-currency {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--neon-cyan);
}

.price-amount {
    font-size: 3.5rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 1;
}

.price-period {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.plan-features {
    list-style: none;
    margin-bottom: 3rem;
    flex-grow: 1;
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.plan-features li.disabled {
    color: var(--text-muted);
    text-decoration: line-through;
}

.plan-features svg {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    color: var(--neon-cyan);
}

.plan-features li.disabled svg {
    color: var(--text-muted);
}

.pricing-card .btn {
    width: 100%;
}

/* ==========================================================================
   组件: 推荐文章 (Articles Section)
   ========================================================================== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    transform: translateY(-8px);
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

.article-thumb {
    height: 180px;
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.08) 0%, rgba(225, 0, 255, 0.08) 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.article-thumb-pattern {
    font-size: 3.5rem;
    opacity: 0.3;
    filter: drop-shadow(0 0 10px var(--neon-cyan-glow));
}

.article-category {
    position: absolute;
    bottom: 1rem;
    left: 1.5rem;
    background: rgba(7, 6, 15, 0.85);
    border: 1px solid var(--border-color);
    color: var(--neon-cyan);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    backdrop-filter: blur(5px);
}

.article-content {
    padding: 1.8rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.article-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.article-content h3 {
    font-size: 1.15rem;
    margin-bottom: 1rem;
    line-height: 1.4;
    transition: var(--transition-fast);
}

.article-card:hover h3 {
    color: var(--neon-cyan);
}

.article-excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}

.article-link {
    margin-top: auto;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--neon-cyan);
}

.article-link svg {
    transition: var(--transition-fast);
}

.article-card:hover .article-link svg {
    transform: translateX(4px);
}

/* ==========================================================================
   组件: 用户评价 (Reviews)
   ========================================================================== */
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.0rem;
}

.review-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2.2rem;
    transition: var(--transition-normal);
}

.review-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-5px);
}

.review-stars {
    color: #ffbe1a;
    margin-bottom: 1rem;
    display: flex;
    gap: 0.2rem;
}

.review-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-style: italic;
}

.review-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: #151324;
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--neon-cyan);
    font-size: 1.1rem;
}

.user-info h4 {
    font-size: 0.95rem;
    color: #ffffff;
}

.user-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ==========================================================================
   组件: 常见问题FAQ (FAQs)
   ========================================================================== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: var(--transition-normal);
}

.faq-item:hover {
    border-color: var(--border-hover);
}

.faq-question {
    padding: 1.5rem 1.8rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.05rem;
}

.faq-icon {
    width: 20px;
    height: 20px;
    position: relative;
    flex-shrink: 0;
}

.faq-icon::before, .faq-icon::after {
    content: '';
    position: absolute;
    background-color: #ffffff;
    transition: var(--transition-normal);
}

.faq-icon::before {
    top: 9px;
    left: 2px;
    width: 16px;
    height: 2px;
}

.faq-icon::after {
    top: 2px;
    left: 9px;
    width: 2px;
    height: 16px;
}

.faq-item.active .faq-icon::after {
    transform: rotate(90deg);
    opacity: 0;
}

.faq-item.active .faq-question {
    color: var(--neon-cyan);
}

.faq-answer {
    padding: 0 1.8rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0, 1, 0, 1);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.faq-item.active .faq-answer {
    padding: 0 1.8rem 1.5rem 1.8rem;
    max-height: 500px;
    transition: max-height 0.4s cubic-bezier(1, 0, 1, 0);
}

/* ==========================================================================
   组件: CTA 区块 (Call to Action)
   ========================================================================== */
.cta-section {
    position: relative;
    padding: 100px 0;
}

.cta-box {
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.08) 0%, rgba(225, 0, 255, 0.05) 100%);
    border: 1px solid var(--border-color);
    border-radius: 32px;
    padding: 4.5rem 2rem;
    text-align: center;
    backdrop-filter: blur(12px);
    position: relative;
    overflow: hidden;
}

.cta-box::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(0, 242, 254, 0.15) 0%, transparent 60%);
    bottom: -150px;
    right: -100px;
}

.cta-box h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-box p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem auto;
    font-size: 1.1rem;
}

/* ==========================================================================
   组件: 页脚 (Footer)
   ========================================================================== */
.footer {
    background: #04030a;
    border-top: 1px solid var(--border-color);
    padding: 80px 0 30px 0;
    color: var(--text-secondary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-info .logo {
    margin-bottom: 1.5rem;
}

.footer-info p {
    max-width: 350px;
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.footer-title {
    font-size: 1rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--neon-cyan);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.03);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-bottom-links {
    display: flex;
    gap: 2rem;
}

.footer-bottom-links a:hover {
    color: var(--neon-cyan);
}

/* ==========================================================================
   页面专属样式: 文章详情页 (Article Detail Page Style)
   ========================================================================== */
.article-page {
    padding-top: 130px;
}

.article-header {
    text-align: center;
    max-width: 900px;
    margin: 0 auto 3rem auto;
}

.article-header .article-category {
    position: static;
    display: inline-block;
    margin-bottom: 1.5rem;
}

.article-header h1 {
    font-size: 2.8rem;
    line-height: 1.3;
    margin-bottom: 1.5rem;
}

.article-main-grid {
    display: grid;
    grid-template-columns: 8fr 4fr;
    gap: 3rem;
    align-items: start;
    margin-bottom: 5rem;
}

.article-body {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 3rem;
}

.article-meta-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.article-text {
    font-size: 1.05rem;
    line-height: 1.8;
    color: #e2e8f0;
}

.article-text h2 {
    font-size: 1.6rem;
    margin: 2.5rem 0 1.2rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 0.5rem;
    color: #ffffff;
}

.article-text h3 {
    font-size: 1.3rem;
    margin: 2rem 0 1rem 0;
    color: var(--neon-cyan);
}

.article-text p {
    margin-bottom: 1.5rem;
    text-align: justify;
}

.article-text ul, .article-text ol {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
}

.article-text li {
    margin-bottom: 0.5rem;
}

.article-text strong {
    color: #ffffff;
}

.article-text blockquote {
    border-left: 4px solid var(--neon-cyan);
    background: rgba(0, 242, 254, 0.02);
    padding: 1.2rem 1.5rem;
    border-radius: 0 12px 12px 0;
    margin: 2rem 0;
    font-style: italic;
    color: var(--text-secondary);
}

.article-sidebar {
    position: sticky;
    top: 100px;
}

.sidebar-widget {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.widget-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
    color: #ffffff;
    border-left: 3px solid var(--neon-cyan);
    padding-left: 0.6rem;
}

.cta-widget {
    background: linear-gradient(135deg, rgba(0, 242, 254, 0.08) 0%, rgba(225, 0, 255, 0.05) 100%);
    text-align: center;
    border-color: rgba(0, 242, 254, 0.2);
}

.cta-widget h4 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
}

.cta-widget p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.cta-widget .btn {
    width: 100%;
}

.widget-links {
    list-style: none;
}

.widget-links li {
    margin-bottom: 1rem;
}

.widget-links a {
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: block;
    line-height: 1.4;
}

.widget-links a:hover {
    color: var(--neon-cyan);
}

.related-articles {
    border-top: 1px solid var(--border-color);
    padding-top: 4px;
    margin-top: 4rem;
}

.related-articles h2 {
    font-size: 1.75rem;
    margin-bottom: 2rem;
}

/* ==========================================================================
   提示消息组件 (Toast Notifications)
   ========================================================================== */
.toast-msg {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(18, 17, 30, 0.9);
    border: 1px solid var(--neon-cyan);
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.25);
    color: #ffffff;
    padding: 0.75rem 2rem;
    border-radius: 10px;
    z-index: 1000;
    font-weight: 600;
    font-size: 0.9rem;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.toast-msg.show {
    transform: translateX(-50%) translateY(0);
}

/* ==========================================================================
   响应式断点适配 (Media Queries)
   ========================================================================== */

/* 1024px 以下 (平板/小屏笔记本) */
@media (max-width: 1024px) {
    .hero-card-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .features-grid, .pricing-grid, .articles-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .article-main-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .article-sidebar {
        position: static;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 3rem;
    }
    
    .footer-info {
        grid-column: span 2;
    }
}

/* 768px 以下 (大屏手机/纵向平板) */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 75px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 75px);
        background: #07060f;
        flex-direction: column;
        align-items: center;
        padding-top: 3rem;
        gap: 2rem;
        transition: var(--transition-normal);
        z-index: 99;
        border-top: 1px solid rgba(255,255,255,0.03);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .menu-toggle.active span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    .menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .menu-toggle.active span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .nav-cta {
        display: none;
    }
    
    .hero-detail-section {
        padding: 100px 0 40px 0;
    }
    
    .airport-brand-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .airport-title-row h1 {
        font-size: 2rem;
    }
    
    .features-grid, .pricing-grid, .articles-grid, .reviews-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .pricing-card.popular {
        transform: none !important;
    }
    
    .airport-spec-grid {
        grid-template-columns: 1fr;
    }
    
    .spec-item {
        border-right: none !important;
        border-bottom: 1px solid rgba(255,255,255,0.03) !important;
    }
    
    .spec-item:last-child {
        border-bottom: none !important;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .footer-info {
        grid-column: span 1;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .article-body {
        padding: 1.5rem;
    }
}

/* 480px 以下 (手机) */
@media (max-width: 480px) {
    .airport-title-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.2rem;
    }
    
    .price-amount {
        font-size: 2.8rem;
    }
    
    .faq-question {
        padding: 1.2rem 1rem;
        font-size: 0.95rem;
    }
    
    .faq-answer {
        padding: 0 1rem;
    }
    
    .faq-item.active .faq-answer {
        padding: 0 1rem 1.2rem 1rem;
    }
}