/* ============================================
   新疆简悠国际旅行社 - 品牌官网样式
   设计语言：极简主义 × 大地理美学
   ============================================ */

/* ---------- CSS 变量 / 设计令牌 ---------- */
:root {
    /* 主色调 - 大地色系 */
    --color-poplar-gold: #D4A853;      /* 胡杨金 */
    --color-dune-yellow: #E8C872;      /* 沙丘黄 */
    --color-sayram-blue: #2B6CB0;      /* 赛里木湖蓝（新疆蓝） */
    --color-congling-green: #3D7A5F;   /* 葱岭绿 */
    --color-earth-brown: #8B6914;      /* 大地棕 */
    --color-warm-white: #FDFBF7;       /* 暖白 */
    --color-pure-white: #FFFFFF;       /* 纯白 */
    --color-ink-dark: #1A1A1A;         /* 墨色 */
    --color-text-primary: #2D2D2D;     /* 主文字 */
    --color-text-secondary: #6B6B6B;   /* 次文字 */
    --color-text-light: #999999;       /* 浅文字 */
    --color-bg-light: #FAF8F3;         /* 浅背景 */
    --color-bg-dark: #1A1A1A;          /* 深色背景 */
    --color-footer-bg: #1C1C1C;        /* Footer背景 */

    /* 玻璃态 */
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-bg-solid: rgba(255, 255, 255, 0.85);
    --glass-blur: blur(12px);
    --glass-border: rgba(255, 255, 255, 0.18);

    /* 字体 */
    --font-serif: 'Playfair Display', 'Noto Serif SC', 'Times New Roman', serif;
    --font-sans: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-logo: 'Playfair Display', 'Noto Serif SC', serif;

    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 10rem;

    /* 过渡 */
    --transition-smooth: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-fast: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-slow: all 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);

    /* 阴影 */
    --shadow-soft: 0 4px 24px rgba(0, 0, 0, 0.06);
    --shadow-medium: 0 8px 40px rgba(0, 0, 0, 0.1);
    --shadow-deep: 0 20px 60px rgba(0, 0, 0, 0.15);
    --shadow-gold: 0 8px 32px rgba(212, 168, 83, 0.25);

    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

/* ---------- Reset & 基础样式 ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-weight: 400;
    color: var(--color-text-primary);
    background-color: var(--color-warm-white);
    line-height: 1.7;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    display: block;
}

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

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ---------- 滚动进度条 ---------- */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, #4338CA 0%, var(--color-poplar-gold) 100%);
    z-index: 9999;
    transition: width 0.1s ease-out;
}

/* ---------- 导航栏 ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: var(--transition-smooth);
    background: transparent;
}

.navbar.scrolled {
    background: var(--glass-bg-solid);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    box-shadow: var(--shadow-soft);
    padding: 0.75rem 0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    line-height: 1.1;
}

.nav-logo .logo-cn {
    font-family: var(--font-logo);
    font-size: 2.1rem;
    font-weight: 700;
    color: var(--color-pure-white);
    letter-spacing: 3px;
    transition: var(--transition-fast);
}

.nav-logo .logo-en {
    font-family: var(--font-serif);
    font-size: 0.7rem;
    letter-spacing: 4px;
    color: var(--color-dune-yellow);
    text-transform: uppercase;
    margin-top: 2px;
    transition: var(--transition-fast);
}

.navbar.scrolled .nav-logo .logo-cn {
    color: var(--color-ink-dark);
}

.navbar.scrolled .nav-logo .logo-en {
    color: var(--color-poplar-gold);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    position: relative;
    padding: var(--spacing-xs) 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-poplar-gold);
    transition: var(--transition-fast);
    transform: translateX(-50%);
}

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

.nav-link:hover,
.nav-link.active {
    color: var(--color-poplar-gold);
}

/* ---------- 汉堡菜单 ---------- */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 22px;
    position: relative;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-pure-white);
    border-radius: 2px;
    transition: var(--transition-fast);
    transform-origin: center;
}

.navbar.scrolled .hamburger span {
    background: var(--color-text-primary);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(10px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-10px) rotate(-45deg);
}

/* ---------- 移动端全屏菜单 ---------- */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 26, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                visibility 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.mobile-menu.active {
    opacity: 1;
    visibility: visible;
}

.mobile-menu-list {
    text-align: center;
    transform: translateY(30px);
    opacity: 0;
    transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.1s;
}

.mobile-menu.active .mobile-menu-list {
    transform: translateY(0);
    opacity: 1;
}

.mobile-menu-list li {
    margin: var(--spacing-md) 0;
}

.mobile-nav-link {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--color-pure-white);
    font-weight: 400;
    letter-spacing: 4px;
    position: relative;
}

.mobile-nav-link:hover {
    color: var(--color-poplar-gold);
}

/* ---------- Hero 主视觉区 ---------- */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-video {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    animation: kenBurns 20s ease-in-out infinite alternate;
}

@keyframes kenBurns {
    0% {
        transform: scale(1) translate(0, 0);
    }
    100% {
        transform: scale(1.08) translate(-1%, -1%);
    }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at center, transparent 0%, rgba(0,0,0,0.15) 60%, rgba(0,0,0,0.45) 100%),
        linear-gradient(to bottom, rgba(0,0,0,0.35) 0%, rgba(0,0,0,0.1) 35%, rgba(0,0,0,0.15) 65%, rgba(0,0,0,0.65) 100%);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--color-pure-white);
    padding: 0 var(--spacing-md);
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 8vw, 6rem);
    font-weight: 500;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    letter-spacing: 8px;
    /* 文字光影效果 - 阳光洒落感 */
    text-shadow:
        0 2px 20px rgba(255, 200, 100, 0.3),
        0 4px 40px rgba(255, 180, 80, 0.2),
        0 8px 60px rgba(0, 0, 0, 0.4);
}

.title-line {
    display: inline-block;
}

.title-divider {
    margin: 0 0.5em;
    color: var(--color-dune-yellow);
    font-weight: 300;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    font-weight: 300;
    letter-spacing: 4px;
    opacity: 0.9;
    margin-top: var(--spacing-sm);
}

/* 探索按钮 */
.scroll-down {
    position: absolute;
    bottom: 60px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-pure-white);
    animation: floatDown 2s ease-in-out infinite;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--color-pure-white);
    border-bottom: 2px solid var(--color-pure-white);
    transform: rotate(45deg);
    opacity: 0.8;
}

.scroll-text {
    font-size: 0.8rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    opacity: 0.7;
}

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

/* ---------- 通用 Section 样式 ---------- */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    padding: 0 var(--spacing-md);
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    letter-spacing: 4px;
    color: var(--color-poplar-gold);
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 500;
    color: var(--color-ink-dark);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 4px;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* ---------- 按钮样式 ---------- */
.btn-primary {
    display: inline-block;
    padding: 1rem 3rem;
    background: var(--color-poplar-gold);
    color: var(--color-pure-white);
    font-size: 0.95rem;
    letter-spacing: 2px;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
    background: var(--color-earth-brown);
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(212, 168, 83, 0.35);
}

.btn-light {
    display: inline-block;
    padding: 1rem 3rem;
    background: var(--color-pure-white);
    color: var(--color-ink-dark);
    font-size: 0.95rem;
    letter-spacing: 2px;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
}

.btn-light:hover {
    background: var(--color-dune-yellow);
    transform: translateY(-2px);
}

/* ---------- 爆款路线卡片 ---------- */
.featured-tours {
    padding: var(--spacing-xxl) 0;
    background: var(--color-warm-white);
}

.tours-grid {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.tour-card {
    background: var(--color-pure-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition-smooth);
    cursor: pointer;
    position: relative;
}

.tour-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(212, 168, 83, 0);
    pointer-events: none;
    transition: border-color 0.5s ease;
}

.tour-card:hover {
    transform: translateY(-12px);
    box-shadow: var(--shadow-deep);
}

.tour-card:hover::after {
    border-color: rgba(212, 168, 83, 0.3);
}

.tour-image {
    position: relative;
    width: 100%;
    padding-top: 66.6%; /* 3:2 宽屏比例 */
    overflow: hidden;
}

.tour-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 50%, rgba(0,0,0,0.25) 100%);
    z-index: 1;
    pointer-events: none;
}

.tour-image .skeleton {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.tour-card:hover .tour-image .skeleton {
    transform: scale(1.06);
}

.tour-badge {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    padding: 0.45rem 1.1rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--color-pure-white);
    font-size: 0.72rem;
    letter-spacing: 2px;
    border-radius: 50px;
    z-index: 2;
    text-transform: uppercase;
}

.tour-content {
    padding: var(--spacing-md);
}

.tour-meta {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.tour-duration,
.tour-region {
    font-size: 0.8rem;
    color: var(--color-text-light);
    letter-spacing: 1px;
}

.tour-duration::before {
    content: '⏱ ';
}

.tour-region::before {
    content: '📍 ';
}

.tour-title {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--color-ink-dark);
    margin-bottom: 0.75rem;
    letter-spacing: 1px;
}

.tour-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.tour-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.tour-phone {
    font-size: 0.85rem;
    color: var(--color-earth-brown);
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: var(--transition-fast);
}

.tour-phone:hover {
    color: var(--color-poplar-gold);
}

.tour-link {
    font-size: 0.9rem;
    color: var(--color-sayram-blue);
    font-weight: 500;
}

.tour-link:hover {
    color: var(--color-poplar-gold);
}

/* ---------- 文化符号区 ---------- */
.cultural-moment {
    padding: var(--spacing-xxl) 0;
    background: var(--color-bg-light);
}

.cultural-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.cultural-item {
    display: grid;
    grid-template-columns: 5fr 6fr;
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-xxl);
    position: relative;
}

.cultural-item:last-child {
    margin-bottom: 0;
}

.cultural-reverse {
    grid-template-columns: 6fr 5fr;
}

.cultural-reverse .cultural-image {
    order: 2;
}

.cultural-reverse .cultural-text {
    order: 1;
}

.cultural-image {
    position: relative;
    width: 100%;
    padding-top: 125%;
    overflow: hidden;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
}

.cultural-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 60%, rgba(0,0,0,0.15) 100%);
    pointer-events: none;
    z-index: 1;
}

.cultural-image .skeleton {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.cultural-item:hover .cultural-image .skeleton {
    transform: scale(1.05);
}

.cultural-text {
    padding: var(--spacing-lg) var(--spacing-sm);
    position: relative;
}

.cultural-text::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 2px;
    height: 60px;
    background: linear-gradient(to bottom, var(--color-poplar-gold), transparent);
}

.cultural-tag {
    display: inline-block;
    font-size: 0.75rem;
    letter-spacing: 4px;
    color: var(--color-congling-green);
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.cultural-title {
    font-family: var(--font-serif);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 500;
    color: var(--color-ink-dark);
    margin-bottom: var(--spacing-md);
    letter-spacing: 3px;
}

.cultural-desc {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 2;
    margin-bottom: var(--spacing-md);
}

.cultural-link {
    display: inline-block;
    font-size: 0.95rem;
    color: var(--color-earth-brown);
    font-weight: 500;
    letter-spacing: 1px;
    position: relative;
    padding-bottom: 4px;
}

.cultural-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--color-earth-brown);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.cultural-link:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* ---------- 私人定制区 ---------- */
.custom-section {
    position: relative;
    padding: var(--spacing-xxl) 0;
    overflow: hidden;
    text-align: center;
}

.custom-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.custom-bg .skeleton {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.custom-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 30% 50%, rgba(43, 108, 176, 0.3) 0%, transparent 60%),
        linear-gradient(135deg, rgba(26, 26, 26, 0.75) 0%, rgba(26, 26, 26, 0.45) 50%, rgba(43, 108, 176, 0.3) 100%);
}

.custom-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    color: var(--color-pure-white);
}

.custom-tag {
    display: inline-block;
    font-size: 0.75rem;
    letter-spacing: 4px;
    color: var(--color-dune-yellow);
    text-transform: uppercase;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.custom-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    letter-spacing: 4px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.custom-desc {
    font-size: 1.1rem;
    opacity: 0.9;
    line-height: 2;
    margin-bottom: var(--spacing-lg);
}

/* ---------- 旅拍画廊 ---------- */
.photo-section {
    padding: var(--spacing-xxl) 0;
    background: var(--color-warm-white);
}

.photo-gallery {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    grid-auto-rows: 180px;
    gap: 1rem;
}

.photo-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-md);
    cursor: pointer;
    box-shadow: var(--shadow-soft);
}

.photo-item .skeleton {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.photo-item:hover .skeleton {
    transform: scale(1.08);
}

.photo-item::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.5) 0%, transparent 45%);
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: 1;
    pointer-events: none;
    border-radius: var(--radius-md);
}

.photo-item:hover::after {
    opacity: 1;
}

.photo-item-large {
    grid-column: span 2;
    grid-row: span 3;
}

.photo-item-tall {
    grid-column: span 2;
    grid-row: span 2;
}

.photo-item-wide {
    grid-column: span 2;
    grid-row: span 1;
}

.photo-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 2;
    padding: var(--spacing-md);
    transform: translateY(15px);
    opacity: 0;
    transition: var(--transition-smooth);
}

.photo-item:hover .photo-overlay {
    transform: translateY(0);
    opacity: 1;
}

.photo-caption {
    color: var(--color-pure-white);
    font-size: 0.95rem;
    letter-spacing: 2px;
    font-weight: 500;
}

.photo-caption::before {
    content: '';
    display: inline-block;
    width: 24px;
    height: 1px;
    background: var(--color-dune-yellow);
    vertical-align: middle;
    margin-right: 0.6rem;
}

/* ---------- Footer ---------- */
.footer {
    background: var(--color-footer-bg);
    color: rgba(255, 255, 255, 0.7);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-left {
    flex: 1;
    min-width: 280px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
}

.footer-logo .logo-cn {
    font-family: var(--font-logo);
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--color-pure-white);
    letter-spacing: 3px;
}

.footer-logo .logo-en {
    font-family: var(--font-serif);
    font-size: 0.75rem;
    letter-spacing: 5px;
    color: var(--color-dune-yellow);
    text-transform: uppercase;
    margin-top: 4px;
}

.footer-slogan {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.6);
}

.footer-slogan span {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    opacity: 0.7;
}

.footer-right {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    min-width: 280px;
}

.footer-social {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.social-label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 1px;
}

.social-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.social-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.social-icon svg {
    width: 20px;
    height: 20px;
    fill: rgba(255, 255, 255, 0.7);
    transition: var(--transition-fast);
}

.social-icon:hover {
    background: var(--color-poplar-gold);
    transform: translateY(-3px);
}

.social-icon:hover svg {
    fill: var(--color-pure-white);
}

.footer-contact p {
    font-size: 0.9rem;
    line-height: 2;
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom {
    max-width: 1400px;
    margin: var(--spacing-lg) auto 0;
    padding: var(--spacing-md) var(--spacing-md) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ---------- 骨架屏 Shimmer 效果 ---------- */
.skeleton {
    background-color: #e8e4dc;
    position: relative;
    overflow: hidden;
}

.skeleton.shimmer::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.4) 50%,
        transparent 100%
    );
    animation: shimmer 1.8s infinite;
}

.skeleton.loaded::before {
    display: none;
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

/* ---------- 滚动触发动画 ---------- */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- 响应式设计 - Mobile First ---------- */

/* 平板设备 */
@media (max-width: 1024px) {
    :root {
        --spacing-xxl: 7rem;
        --spacing-xl: 4rem;
    }

    .cultural-item {
        gap: var(--spacing-lg);
    }

    .photo-gallery {
        grid-template-columns: repeat(4, 1fr);
        grid-auto-rows: 160px;
    }

    .photo-item-large {
        grid-column: span 2;
        grid-row: span 2;
    }

    .photo-item-tall {
        grid-column: span 2;
        grid-row: span 2;
    }

    .photo-item-wide {
        grid-column: span 2;
        grid-row: span 1;
    }
}

/* 移动端 */
@media (max-width: 768px) {
    :root {
        --spacing-xxl: 5rem;
        --spacing-xl: 3rem;
        --spacing-lg: 2.5rem;
    }

    .nav-menu {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hero-title {
        letter-spacing: 4px;
    }

    .title-divider {
        display: block;
        margin: 0.5rem auto;
    }

    .tours-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .cultural-item,
    .cultural-reverse {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        margin-bottom: var(--spacing-xl);
    }

    .cultural-reverse .cultural-image,
    .cultural-reverse .cultural-text {
        order: 0;
    }

    .cultural-text {
        padding: 0;
    }

    .cultural-image {
        padding-top: 75%;
    }

    .photo-gallery {
        grid-template-columns: repeat(2, 1fr);
        grid-auto-rows: 140px;
        gap: 0.5rem;
    }

    .photo-item-large {
        grid-column: span 2;
        grid-row: span 2;
    }

    .photo-item-tall {
        grid-column: span 1;
        grid-row: span 2;
    }

    .photo-item-wide {
        grid-column: span 2;
        grid-row: span 1;
    }

    .footer-container {
        flex-direction: column;
        text-align: center;
    }

    .footer-right {
        align-items: center;
    }

    .footer-social {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .custom-bg .skeleton {
        background-attachment: scroll;
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    :root {
        --spacing-xxl: 4rem;
        --spacing-xl: 2.5rem;
    }

    .nav-container {
        padding: 0 var(--spacing-sm);
    }

    .nav-logo .logo-cn {
        font-size: 1.5rem;
        letter-spacing: 1px;
    }

    .hero-subtitle {
        letter-spacing: 2px;
    }

    .section-title {
        letter-spacing: 2px;
    }

    .tour-content {
        padding: 1.25rem;
    }

    .tour-title {
        font-size: 1.2rem;
    }

    .tour-price {
        font-size: 1.3rem;
    }

    .custom-title {
        letter-spacing: 2px;
    }

    .photo-gallery {
        grid-auto-rows: 120px;
    }
}

/* ---------- 滚动条美化 ---------- */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-light);
}

::-webkit-scrollbar-thumb {
    background: var(--color-poplar-gold);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-earth-brown);
}

/* ---------- 选中文本样式 ---------- */
::selection {
    background: var(--color-poplar-gold);
    color: var(--color-pure-white);
}

/* ---------- 减少动画偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}