/* ============================================
   护生网首页样式 - 放生站定制
   主色：青绿（生态）+ 米黄（文化）+ 浅金（公益）
   ============================================ */

:root {
    --color-primary: #2E7D5B;
    --color-primary-dark: #1F5C42;
    --color-primary-light: #4FA37A;
    --color-secondary: #D4A847;
    --color-accent: #8B6F47;
    --color-cream: #F5EFE0;
    --color-bg: #FAF8F3;
    --color-text: #2C2C2C;
    --color-text-light: #6B6B6B;
    --color-border: #E5E0D5;
    --color-white: #FFFFFF;
    --color-danger: #C0392B;
    --color-success: #27AE60;
    --fs-base: 16px;
    --fs-sm: 14px;
    --fs-lg: 18px;
    --fs-xl: 24px;
    --fs-2xl: 32px;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --shadow-sm: 0 2px 8px rgba(46, 125, 91, 0.08);
    --shadow-md: 0 4px 16px rgba(46, 125, 91, 0.12);
    --shadow-lg: 0 8px 32px rgba(46, 125, 91, 0.16);
    --container-max: 1200px;
    --gap: 24px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: var(--fs-base); scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: var(--fs-base);
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; transition: color .2s; }
a:hover { color: var(--color-primary); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.container { max-width: var(--container-max); margin: 0 auto; padding: 0 20px; }

/* ============================================
   顶部公益banner
   ============================================ */
.top-bar {
    background: linear-gradient(90deg, var(--color-primary-dark), var(--color-primary));
    color: var(--color-white);
    font-size: var(--fs-sm);
    padding: 8px 0;
}
.top-bar .container { display: flex; align-items: center; gap: 12px; }
.top-bar-icon { font-size: 18px; }
.top-bar-text { flex: 1; }
.top-bar-links a { color: rgba(255,255,255,.85); margin-left: 8px; }
.top-bar-links a:hover { color: var(--color-secondary); }

/* ============================================
   头部导航 - 紧凑布局
   ============================================ */
.site-header {
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 14px 20px;
    flex-wrap: nowrap;
}
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo a { display: flex; align-items: center; gap: 8px; }
.logo-icon { font-size: 32px; line-height: 1; }
.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-primary-dark);
    letter-spacing: 1px;
    white-space: nowrap;
}
.logo-slogan {
    font-size: 12px;
    color: var(--color-text-light);
    border-left: 1px solid var(--color-border);
    padding-left: 10px;
    line-height: 1.3;
    white-space: nowrap;
}

.main-nav { flex: 1; min-width: 0; }
.main-nav ul { display: flex; gap: 2px; flex-wrap: nowrap; justify-content: center; }
.main-nav a {
    display: block;
    padding: 10px 12px;
    font-size: 15px;
    font-weight: 500;
    color: var(--color-text);
    border-radius: var(--radius-md);
    transition: all .2s;
    white-space: nowrap;
}
.main-nav a:hover, .main-nav .active a {
    color: var(--color-primary);
    background: rgba(46, 125, 91, 0.08);
}
.main-nav .nav-cta {
    background: var(--color-primary);
    color: var(--color-white) !important;
}
.main-nav .nav-cta:hover { background: var(--color-primary-dark); }

.header-search { width: 200px; flex-shrink: 0; }
.header-search form {
    display: flex;
    background: var(--color-bg);
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--color-border);
}
.header-search input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 9px 14px;
    font-size: var(--fs-sm);
    outline: none;
    min-width: 0;
}
.header-search button {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 0 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
    flex-shrink: 0;
}
.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
}

/* ============================================
   Hero轮播
   ============================================ */
.hero-banner {
    position: relative;
    height: 480px;
    overflow: hidden;
    background: var(--color-primary-dark);
}
.hero-swiper { width: 100%; height: 100%; position: relative; }
.hero-swiper .swiper-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity .8s;
}
.hero-swiper .swiper-slide.swiper-slide-active { opacity: 1; z-index: 1; }
.hero-slide-bg {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-deco {
    position: absolute;
    right: 8%;
    top: 50%;
    transform: translateY(-50%);
    font-size: 180px;
    opacity: .25;
    filter: drop-shadow(0 4px 20px rgba(0,0,0,.2));
}
.hero-caption {
    position: absolute;
    left: 10%;
    top: 50%;
    transform: translateY(-50%);
    max-width: 580px;
    color: var(--color-white);
    text-shadow: 0 2px 12px rgba(0,0,0,.4);
    z-index: 2;
}
.hero-caption h2 { font-size: 44px; font-weight: 700; margin-bottom: 18px; line-height: 1.3; }
.hero-caption p { font-size: 18px; margin-bottom: 28px; opacity: .95; }
.hero-btn {
    display: inline-block;
    background: var(--color-secondary);
    color: var(--color-text);
    padding: 14px 32px;
    border-radius: 28px;
    font-weight: 600;
    transition: all .2s;
    font-size: 16px;
}
.hero-btn:hover { background: var(--color-cream); transform: translateY(-2px); color: var(--color-text); }

.swiper-pagination {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 3;
}
.swiper-pagination-bullet {
    width: 12px;
    height: 12px;
    background: rgba(255,255,255,.5);
    border-radius: 50%;
    cursor: pointer;
    transition: all .3s;
}
.swiper-pagination-bullet-active {
    background: var(--color-secondary);
    width: 36px;
    border-radius: 6px;
}
.swiper-button-prev, .swiper-button-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    color: var(--color-white);
    background: rgba(0,0,0,.3);
    border-radius: 50%;
    cursor: pointer;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .2s;
}
.swiper-button-prev:hover, .swiper-button-next:hover { background: rgba(0,0,0,.5); }
.swiper-button-prev { left: 20px; }
.swiper-button-next { right: 20px; }
.swiper-button-prev::after, .swiper-button-next::after {
    font-family: monospace;
    font-size: 22px;
    font-weight: bold;
}
.swiper-button-prev::after { content: '‹'; }
.swiper-button-next::after { content: '›'; }

/* ============================================
   Section通用
   ============================================ */
.section {
    padding: 64px 0;
}
.section:nth-child(even) { background: var(--color-cream); }
.section.core-entries { background: var(--color-white); }

.section-header {
    text-align: center;
    margin-bottom: 40px;
    position: relative;
    padding: 0 60px;
}
.section-title {
    font-size: var(--fs-2xl);
    color: var(--color-primary-dark);
    font-weight: 700;
    margin-bottom: 12px;
}
.section-subtitle {
    font-size: var(--fs-base);
    color: var(--color-text-light);
}
.section-more {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-primary);
    font-size: var(--fs-sm);
    white-space: nowrap;
}

/* ============================================
   四大核心入口
   ============================================ */
.entries-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap);
}
.entry-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all .3s;
    border: 2px solid transparent;
    display: block;
}
.entry-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
    color: inherit;
}
.entry-icon {
    font-size: 48px;
    margin-bottom: 16px;
}
.entry-card h3 {
    font-size: var(--fs-xl);
    color: var(--color-primary-dark);
    margin-bottom: 12px;
    font-weight: 600;
}
.entry-card p {
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 16px;
}
.entry-link {
    color: var(--color-primary);
    font-size: var(--fs-sm);
    font-weight: 600;
}

/* ============================================
   科学放生
   ============================================ */
.science-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--gap);
}
.science-main {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}
.science-main-link { display: block; color: inherit; }
.science-main-img {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.main-img-emoji,
.placeholder-text {
    font-size: 100px;
    line-height: 1;
}
.placeholder-img {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: rgba(255,255,255,.9);
    text-shadow: 0 2px 8px rgba(0,0,0,.2);
    width: 100%;
    height: 100%;
}
.placeholder-img-sm .placeholder-text { font-size: 72px; }
.placeholder-img-hero .placeholder-text { font-size: 140px; }
.placeholder-label {
    font-size: 14px;
    background: rgba(255,255,255,.2);
    padding: 4px 12px;
    border-radius: 14px;
    backdrop-filter: blur(4px);
    font-weight: 600;
    letter-spacing: 1px;
}
.badge-hot {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--color-danger);
    color: var(--color-white);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    z-index: 2;
}
.science-main-body { padding: 24px; }
.article-cat {
    display: inline-block;
    background: rgba(46, 125, 91, .1);
    color: var(--color-primary-dark);
    padding: 2px 12px;
    border-radius: 12px;
    font-size: 12px;
    margin-bottom: 12px;
    font-weight: 600;
}
.science-main-body h3 {
    font-size: 22px;
    color: var(--color-primary-dark);
    margin-bottom: 12px;
    line-height: 1.4;
    font-weight: 700;
}
.science-main-body p {
    color: var(--color-text-light);
    margin-bottom: 16px;
    line-height: 1.7;
    font-size: 14px;
}
.article-meta {
    display: flex;
    gap: 16px;
    font-size: var(--fs-sm);
    color: var(--color-text-light);
    flex-wrap: wrap;
}

.science-side {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}
.article-list { display: flex; flex-direction: column; }
.article-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px 12px;
    border-bottom: 1px dashed var(--color-border);
    transition: all .2s;
    color: inherit;
}
.article-item:hover { background: var(--color-bg); }
.article-item:last-child { border-bottom: none; }
.article-num {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    color: var(--color-text-light);
    border-radius: 50%;
    font-weight: 700;
    font-size: 14px;
}
.article-item:hover .article-num {
    background: var(--color-primary);
    color: var(--color-white);
}
.article-info { flex: 1; min-width: 0; }
.article-info h4 {
    font-size: 15px;
    color: var(--color-text);
    line-height: 1.5;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-weight: 600;
}
.meta-date { font-size: 12px; color: var(--color-text-light); }

/* ============================================
   公益活动卡片
   ============================================ */
.activity-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap);
}
.activity-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all .3s;
    display: flex;
    flex-direction: column;
}
.activity-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.activity-img {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.activity-img-emoji,
.placeholder-text {
    font-size: 72px;
    line-height: 1;
}
.activity-status {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-white);
    z-index: 2;
}
.status-1 { background: var(--color-success); }
.status-2 { background: var(--color-secondary); }
.status-3 { background: var(--color-text-light); }

.activity-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.activity-body h3 {
    font-size: 17px;
    color: var(--color-primary-dark);
    margin-bottom: 12px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-weight: 700;
}
.activity-meta {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 12px;
    font-size: 13px;
    color: var(--color-text-light);
}
.activity-desc {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 16px;
    flex: 1;
}
.activity-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}
.activity-quota {
    font-size: 13px;
    color: var(--color-text-light);
}
.activity-quota strong { color: var(--color-primary); font-size: 16px; }

.btn-primary {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-white);
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    transition: all .2s;
    border: none;
    cursor: pointer;
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-2px);
}

/* ============================================
   放生文化卡片
   ============================================ */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap);
}
.culture-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all .3s;
}
.culture-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.culture-card a { color: inherit; display: block; }
.culture-img {
    aspect-ratio: 16/10;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.culture-img-emoji,
.placeholder-text {
    font-size: 80px;
    line-height: 1;
}
.culture-body { padding: 20px; }
.culture-cat {
    display: inline-block;
    background: var(--color-cream);
    color: var(--color-accent);
    padding: 2px 12px;
    border-radius: 12px;
    font-size: 12px;
    margin-bottom: 12px;
    font-weight: 600;
}
.culture-body h3 {
    font-size: 17px;
    color: var(--color-primary-dark);
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-weight: 700;
}
.culture-body p {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================
   放生动态列表
   ============================================ */
.news-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--gap);
}
.news-item {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all .3s;
}
.news-item:hover { box-shadow: var(--shadow-md); }
.news-item a {
    display: flex;
    gap: 20px;
    padding: 20px;
    color: inherit;
}
.news-img {
    flex-shrink: 0;
    width: 200px;
    aspect-ratio: 16/10;
    overflow: hidden;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}
.news-img-emoji,
.placeholder-text {
    font-size: 56px;
    line-height: 1;
}
.news-body { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.news-cat-tag {
    display: inline-block;
    background: rgba(46, 125, 91, .1);
    color: var(--color-primary-dark);
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 11px;
    margin-bottom: 10px;
    align-self: flex-start;
    font-weight: 600;
}
.news-body h3 {
    font-size: 17px;
    color: var(--color-primary-dark);
    margin-bottom: 10px;
    line-height: 1.4;
    font-weight: 700;
}
.news-body p {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 12px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-body .article-meta { gap: 12px; flex-wrap: wrap; font-size: 12px; }

/* ============================================
   在线放生服务banner
   ============================================ */
.service-banner {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 48px 60px;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 40px;
    align-items: center;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    position: relative;
}
.service-tag {
    display: inline-block;
    background: rgba(255,255,255,.2);
    color: var(--color-white);
    padding: 4px 16px;
    border-radius: 16px;
    font-size: 13px;
    margin-bottom: 16px;
}
.service-content h2 {
    font-size: 32px;
    margin-bottom: 16px;
    font-weight: 700;
}
.service-content > p {
    font-size: 16px;
    margin-bottom: 24px;
    opacity: .9;
    line-height: 1.7;
}
.service-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 28px;
}
.service-features li {
    font-size: 15px;
    opacity: .95;
}
.service-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.service-actions .btn-primary {
    background: var(--color-secondary);
    color: var(--color-text);
    padding: 12px 32px;
    font-size: 15px;
}
.service-actions .btn-primary:hover { background: var(--color-cream); }
.service-actions .btn-secondary {
    background: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
    padding: 10px 32px;
    border-radius: 24px;
    font-size: 15px;
    font-weight: 600;
    transition: all .2s;
    display: inline-block;
}
.service-actions .btn-secondary:hover {
    background: var(--color-white);
    color: var(--color-primary);
}
.service-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0,0,0,.3);
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
}
.service-image-emoji,
.placeholder-text {
    font-size: 120px;
    line-height: 1;
}

/* ============================================
   FAQ 问答 - GEO结构化
   ============================================ */
.faq-grid {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.faq-item {
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--color-border);
}
.faq-item summary {
    padding: 20px 24px;
    cursor: pointer;
    font-size: 17px;
    font-weight: 600;
    color: var(--color-primary-dark);
    display: flex;
    justify-content: space-between;
    align-items: center;
    list-style: none;
    transition: background .2s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: var(--color-cream); }
.faq-arrow {
    font-size: 24px;
    color: var(--color-primary);
    transition: transform .3s;
    font-weight: 300;
    flex-shrink: 0;
    margin-left: 16px;
}
.faq-item[open] .faq-arrow { transform: rotate(45deg); }
.faq-answer {
    padding: 0 24px 20px;
    color: var(--color-text);
    line-height: 1.8;
}
.faq-answer p { margin-bottom: 8px; }
.faq-answer strong { color: var(--color-primary-dark); }
.faq-source {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--color-border);
    font-size: 13px;
    color: var(--color-text-light);
}

/* ============================================
   合作伙伴
   ============================================ */
.partners-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--gap);
}
.partner-item {
    background: var(--color-white);
    padding: 20px 16px;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all .3s;
    border: 1px solid var(--color-border);
    text-align: center;
}
.partner-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.partner-logo {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-weight: 700;
    font-size: 14px;
}
.partner-name {
    font-size: 12px;
    color: var(--color-text-light);
    line-height: 1.4;
}

/* ============================================
   友情链接
   ============================================ */
.friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    font-size: var(--fs-sm);
    color: var(--color-text-light);
}
.links-label { font-weight: 600; color: var(--color-text); }
.friend-links a {
    color: var(--color-text-light);
    transition: color .2s;
}
.friend-links a:hover { color: var(--color-primary); }

/* ============================================
   底部
   ============================================ */
.site-footer {
    background: linear-gradient(180deg, #1a3a2a, #0f2418);
    color: rgba(255,255,255,.85);
    padding: 56px 0 24px;
    margin-top: 64px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-col h4 {
    font-size: var(--fs-lg);
    color: var(--color-white);
    margin-bottom: 20px;
    font-weight: 600;
}
.footer-col p {
    font-size: var(--fs-sm);
    line-height: 1.8;
    margin-bottom: 16px;
}
.footer-col ul li {
    font-size: var(--fs-sm);
    margin-bottom: 10px;
    line-height: 1.6;
}
.footer-cert {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}
.footer-cert span {
    background: rgba(212, 168, 71, .2);
    color: var(--color-secondary);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
}
.footer-col a:hover { color: var(--color-secondary); }
.footer-qr {
    width: 120px;
    height: 120px;
    background: var(--color-white);
    border-radius: var(--radius-sm);
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.qr-placeholder {
    width: 100%;
    height: 100%;
    background: repeating-linear-gradient(45deg, #2C2C2C, #2C2C2C 4px, #fff 4px, #fff 8px);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    font-size: 11px;
    text-align: center;
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(0,0,0,.5);
}
.footer-bottom {
    padding-top: 24px;
    text-align: center;
    font-size: var(--fs-sm);
    color: rgba(255,255,255,.5);
}
.footer-bottom p { margin-bottom: 8px; }
.footer-declare { font-size: 12px; opacity: .7; }

/* ============================================
   回到顶部
   ============================================ */
.back-to-top {
    position: fixed;
    right: 24px;
    bottom: 80px;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    font-size: 24px;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    z-index: 99;
    transition: all .3s;
    border: none;
    cursor: pointer;
}
.back-to-top:hover { background: var(--color-primary-dark); transform: translateY(-4px); }
.back-to-top.show { display: flex; }

/* ============================================
   浮动客服
   ============================================ */
.floating-service {
    position: fixed;
    right: 24px;
    bottom: 144px;
    z-index: 99;
}
.service-toggle {
    width: 48px;
    height: 48px;
    background: var(--color-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: all .3s;
    cursor: pointer;
    border: none;
}
.service-toggle:hover { transform: scale(1.1); }
.service-menu {
    position: absolute;
    bottom: 70px;
    right: 0;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: none;
    flex-direction: column;
    min-width: 140px;
}
.floating-service.active .service-menu { display: flex; }
.service-item {
    padding: 12px 20px;
    font-size: var(--fs-sm);
    color: var(--color-text);
    transition: background .2s;
    white-space: nowrap;
    cursor: pointer;
}
.service-item:hover { background: var(--color-cream); color: var(--color-primary); }

/* ============================================
   响应式 - 大屏
   ============================================ */
@media (max-width: 1400px) {
    .hero-caption h2 { font-size: 38px; }
    .hero-deco { font-size: 140px; }
}

/* ============================================
   响应式 - 中屏
   ============================================ */
@media (max-width: 1200px) {
    .logo-slogan { display: none; }
    .main-nav a { padding: 8px 10px; font-size: 14px; }
    .header-search { width: 160px; }
    .hero-caption h2 { font-size: 34px; }
    .hero-caption p { font-size: 16px; }
}

/* ============================================
   响应式 - 平板
   ============================================ */
@media (max-width: 992px) {
    .header-inner { gap: 12px; padding: 12px 16px; }

    .hero-banner { height: 380px; }
    .hero-caption { left: 5%; right: 5%; max-width: 90%; }
    .hero-caption h2 { font-size: 30px; }
    .hero-deco { font-size: 100px; right: 3%; }

    .entries-grid, .activity-grid, .culture-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .partners-grid { grid-template-columns: repeat(3, 1fr); }

    .service-banner {
        grid-template-columns: 1fr;
        padding: 40px 32px;
        text-align: center;
    }
    .service-content h2 { font-size: 26px; }
    .service-features { grid-template-columns: 1fr 1fr; max-width: 400px; margin-left: auto; margin-right: auto; }
    .service-actions { justify-content: center; }

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

/* ============================================
   响应式 - 手机
   ============================================ */
@media (max-width: 768px) {
    :root { --fs-base: 15px; --fs-2xl: 24px; }

    .top-bar-text { display: none; }
    .top-bar-links { margin-left: auto; }

    .header-inner { gap: 8px; padding: 10px 16px; }
    .logo-icon { font-size: 26px; }
    .logo-text { font-size: 20px; letter-spacing: 0; }

    .main-nav, .header-search { display: none; }
    .mobile-menu-btn { display: flex; }

    .main-nav.mobile-open {
        display: block;
        order: 3;
        width: 100%;
        margin-top: 12px;
        background: var(--color-white);
        border-radius: var(--radius-md);
        padding: 12px;
        box-shadow: var(--shadow-md);
    }
    .main-nav.mobile-open ul { flex-direction: column; gap: 0; }
    .main-nav.mobile-open a { padding: 12px 16px; border-bottom: 1px solid var(--color-border); }
    .main-nav.mobile-open a:last-child { border-bottom: none; }

    .hero-banner { height: 320px; }
    .hero-caption { left: 5%; right: 5%; }
    .hero-caption h2 { font-size: 24px; margin-bottom: 12px; }
    .hero-caption p { font-size: 14px; margin-bottom: 16px; }
    .hero-btn { padding: 10px 24px; font-size: 14px; }
    .hero-deco { display: none; }

    .section { padding: 40px 0; }
    .section-header { padding: 0 12px; }
    .section-title { font-size: 24px; }
    .section-more { display: none; }

    .entries-grid, .activity-grid, .culture-grid, .news-list, .partners-grid {
        grid-template-columns: 1fr;
    }

    .science-grid { grid-template-columns: 1fr; }
    .news-item a { flex-direction: column; gap: 12px; }
    .news-img { width: 100%; aspect-ratio: 16/9; }

    .service-banner { padding: 32px 20px; }
    .service-content h2 { font-size: 22px; }
    .service-features { grid-template-columns: 1fr; max-width: 240px; }
    .service-actions .btn-primary,
    .service-actions .btn-secondary { padding: 10px 24px; font-size: 14px; }

    .footer-grid { grid-template-columns: 1fr; gap: 32px; }

    .floating-service { right: 16px; bottom: 96px; }
    .back-to-top { right: 16px; bottom: 32px; width: 40px; height: 40px; }

    .swiper-button-prev, .swiper-button-next { width: 36px; height: 36px; }
    .swiper-button-prev { left: 8px; }
    .swiper-button-next { right: 8px; }
}

/* ============================================
   打印样式
   ============================================ */
@media print {
    .site-header, .site-footer, .back-to-top, .floating-service, .top-bar { display: none; }
    body { background: white; }
}

/* ============================================
   响应式修复补丁（RWD 审计 · 仅增量覆盖，不改动/重命名/删除上方既有规则）
   依据 README 断点规范：>992 四列 / 768-992 两列+导航压缩 / <768 单列+汉堡
   ============================================ */

/* 补丁1：汉堡按钮 44px 触摸目标，且在小屏导航隐藏后靠 margin-left:auto 保持右对齐
   （桌面端该按钮 display:none，此规则对桌面零影响） */
.mobile-menu-btn {
    margin-left: auto;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
}

/* 顶栏文本允许收缩，避免 768-992px 区间顶栏溢出 */
.top-bar-text { min-width: 0; }

/* 补丁2：平板档（≤992px）头部防溢出——
   logo(~134px) + 7项导航(~516px) + 搜索框(160px) + 间距 ≈ 834px，
   在 769-850px 视口必然横向溢出；按 README「平板导航压缩」隐藏搜索框并进一步压缩导航 */
@media (max-width: 992px) {
    .header-search { display: none; }
    .main-nav a { padding: 8px 8px; font-size: 14px; }
}

@media (max-width: 768px) {
    /* 补丁3【严重】：.header-inner 原为 flex-wrap:nowrap，.main-nav.mobile-open(width:100%;order:3)
       无法换行，会被挤压在 logo 同行的弹性行内导致菜单无法展开；改为 wrap 使其独占一行下拉。
       （部分页面曾各自打同款补丁，与本规则声明一致，无冲突） */
    .site-header .header-inner { flex-wrap: wrap; }
    .main-nav.mobile-open { flex-basis: 100%; }

    /* 补丁4：触摸目标补足至 44px */
    .back-to-top { width: 44px; height: 44px; }
    .top-bar { padding: 10px 0; }

    /* 补丁5：卡片页脚小屏防挤压 */
    .activity-footer { flex-wrap: wrap; gap: 8px; row-gap: 6px; }

    /* 补丁6：长文本/长 URL 防横向溢出 */
    .faq-answer, .news-body, .activity-body, .culture-body,
    .entry-card, .science-main-body, .footer-col, .friend-links {
        overflow-wrap: break-word;
    }
}