/* ===== 全局重置与基础样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 配色方案 - 现代东方禅意风格 */
    --bg-primary: #F9F7F2;
    --bg-secondary: #FFFEF9;
    --color-ink: #2C3E50;
    --color-ink-light: #34495E;
    --color-accent: #C0392B;
    --color-accent-hover: #A93226;
    --color-gold: #D4AC0D;
    --color-gold-light: #F4D03F;
    --color-text: #2C3E50;
    --color-text-light: #5D6D7E;
    --color-border: #E8E4DD;
    --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 8px 30px rgba(0, 0, 0, 0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-primary);
    color: var(--color-text);
    line-height: 1.7;
    min-height: 100vh;
}

/* ===== 顶部导航栏 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 254, 249, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 0.1em;
}

.logo-text {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-ink);
}

/* ===== 语言切换器 ===== */
.language-switcher {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin-left: 1rem;
    padding: 0.375rem 0.75rem;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.lang-btn {
    padding: 0.25rem 0.5rem;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--color-text-light);
    transition: var(--transition);
    border-radius: 4px;
}

.lang-btn:hover {
    color: var(--color-ink);
}

.lang-btn.active {
    font-weight: 600;
    color: var(--color-accent);
}

.lang-divider {
    color: var(--color-border);
    font-size: 0.8rem;
}

.region-selector {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-primary);
    padding: 0.375rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.region-buttons {
    display: flex;
    flex-wrap: wrap;
    max-width: 500px;
    gap: 0.25rem;
}

.region-search {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding-left: 0.5rem;
    border-left: 1px solid var(--color-border);
    margin-left: 0.25rem;
}

.region-search-input {
    width: 120px;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    background: var(--bg-secondary);
    color: var(--color-text);
    transition: var(--transition);
}

.region-search-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.1);
}

.region-search-input::placeholder {
    color: var(--color-text-light);
}

.region-search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--color-text-light);
    transition: var(--transition);
}

.region-search-btn:hover {
    background: var(--color-border);
    color: var(--color-accent);
}

.region-btn {
    padding: 0.625rem 1.25rem;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.region-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--color-accent);
    opacity: 0;
    transition: var(--transition);
    border-radius: var(--radius-md);
}

.region-btn:hover::before {
    opacity: 0.1;
}

.region-btn.active::before {
    opacity: 1;
    background: var(--color-accent);
}

.region-btn.active .region-name {
    color: white;
}

.region-name {
    font-family: 'Noto Serif SC', serif;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-ink);
    position: relative;
    z-index: 1;
    transition: var(--transition);
}

/* ===== 英雄区域 ===== */
.hero {
    position: relative;
    height: 70vh;
    min-height: 500px;
    max-height: 700px;
    margin-top: 70px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(0, 0, 0, 0.2) 0%,
        rgba(0, 0, 0, 0.4) 50%,
        rgba(0, 0, 0, 0.6) 100%
    );
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 2rem;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 4rem;
    font-weight: 700;
    color: white;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    margin-bottom: 1rem;
    letter-spacing: 0.2em;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 300;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

/* ===== 子导航菜单 ===== */
.sub-nav {
    position: sticky;
    top: 70px;
    z-index: 100;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-soft);
}

.sub-nav-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.75rem 2rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.tab-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border: 2px solid transparent;
    background: transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    font-family: 'Noto Sans SC', sans-serif;
}

.tab-btn:hover {
    background: var(--bg-primary);
}

.tab-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.tab-btn.active .tab-text {
    color: white;
}

.tab-btn.active .tab-icon {
    transform: scale(1.1);
}

.tab-icon {
    font-size: 1.25rem;
    transition: var(--transition);
}

.tab-text {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-ink);
    transition: var(--transition);
}

/* ===== 主内容区域 ===== */
.main-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 3rem 2rem;
    min-height: 60vh;
}

.content-section {
    display: none;
    animation: fadeIn 0.5s ease-out;
}

.content-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-ink);
    margin-bottom: 0.75rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--color-accent);
    border-radius: 2px;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-top: 1rem;
}

/* ===== 文化背景网格 ===== */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.culture-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.culture-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
}

.culture-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.culture-content {
    padding: 1.75rem;
}

.culture-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-gold-light);
    color: var(--color-ink);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 20px;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.culture-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 0.75rem;
}

.culture-text {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ===== 卡片网格 ===== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.item-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
    border: 1px solid var(--color-border);
    position: relative;
}

.item-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
}

.item-image {
    width: 100%;
    height: 240px;
    object-fit: cover;
    transition: var(--transition);
}

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

.item-image-wrapper {
    overflow: hidden;
    position: relative;
}

.item-content {
    padding: 1.5rem;
}

.item-tag {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    background: var(--color-accent);
    color: white;
    font-size: 0.7rem;
    font-weight: 500;
    border-radius: 4px;
    margin-bottom: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.item-title {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 0.625rem;
}

.item-desc {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.item-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.item-location {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.location-icon {
    color: var(--color-gold);
}

/* 足迹复选框样式 */
.visited-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 2px solid var(--color-accent);
    background: transparent;
    color: var(--color-accent);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
    font-family: 'Noto Sans SC', sans-serif;
}

.visited-btn:hover {
    background: rgba(192, 57, 43, 0.1);
}

.visited-btn.visited {
    background: var(--color-accent);
    color: white;
}

.visited-btn.visited::before {
    content: '✓ ';
}

.visited-btn.visited::after {
    content: '已访问';
}

/* ===== 我的足迹 ===== */
.footprints-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-soft);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-medium);
}

.stat-number {
    display: block;
    font-family: 'Noto Serif SC', serif;
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--color-text-light);
}

.footprints-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.footprint-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--bg-secondary);
    padding: 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.footprint-item:hover {
    box-shadow: var(--shadow-soft);
}

.footprint-check {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 2px solid var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.footprint-item.visited .footprint-check {
    background: var(--color-accent);
    color: white;
}

.footprint-item.visited .footprint-check::after {
    content: '✓';
    font-size: 0.75rem;
    font-weight: bold;
}

.footprint-info {
    flex: 1;
}

.footprint-title {
    font-weight: 600;
    color: var(--color-ink);
    margin-bottom: 0.25rem;
}

.footprint-category {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.footprints-empty {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--color-border);
}

.footprints-empty p {
    font-size: 1.25rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.empty-hint {
    font-size: 0.95rem !important;
    color: var(--color-text-light) !important;
}

/* ===== 页脚 ===== */
.footer {
    background: var(--color-ink);
    color: rgba(255, 255, 255, 0.8);
    padding: 3rem 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.copyright {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.footer-note {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .culture-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }

    .cards-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .language-switcher {
        margin-left: 0;
    }

    .region-selector {
        width: 100%;
        flex-direction: column;
        align-items: stretch;
    }

    .region-buttons {
        justify-content: center;
        max-width: 100%;
    }

    .region-search {
        border-left: none;
        border-top: 1px solid var(--color-border);
        padding-left: 0;
        padding-top: 0.5rem;
        margin-left: 0;
        margin-top: 0.25rem;
        justify-content: center;
    }

    .region-search-input {
        width: 200px;
    }

    .hero {
        height: 50vh;
        min-height: 400px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .sub-nav-content {
        padding: 0.5rem 1rem;
        overflow-x: auto;
        justify-content: flex-start;
        -webkit-overflow-scrolling: touch;
    }

    .tab-btn {
        padding: 0.625rem 1.25rem;
        white-space: nowrap;
    }

    .main-content {
        padding: 2rem 1rem;
    }

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

    .culture-grid,
    .cards-grid,
    .footprints-list {
        grid-template-columns: 1fr;
    }

    .footprints-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .stat-card {
        padding: 1.5rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}

@media (max-width: 480px) {
    .region-btn {
        padding: 0.5rem 1rem;
    }

    .region-name {
        font-size: 0.9rem;
    }

    .hero-title {
        font-size: 2rem;
        letter-spacing: 0.1em;
    }

    .tab-text {
        font-size: 0.9rem;
    }

    .item-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .visited-btn {
        width: 100%;
        justify-content: center;
    }
}