/* 海报征集系统 - 工信部政府级高端视觉风格 */
/* 参考「敬请期待」风格：简洁、庄重、专业 */

:root {
    /* 主色：深蓝 - 权威、信任 */
    --color-primary: #0c2340;
    --color-primary-light: #1a365d;
    --color-primary-dark: #061528;
    /* 点缀色：金色 - 正式、尊贵 */
    --color-accent: #c9a227;
    --color-accent-light: #e6c04a;
    --color-accent-muted: rgba(201, 162, 39, 0.15);
    /* 辅助蓝 */
    --color-secondary: #2563eb;
    --color-secondary-hover: #1d4ed8;
    /* 中性色 */
    --color-text: #1f2937;
    --color-text-muted: #6b7280;
    --color-text-light: #9ca3af;
    --color-bg: #f8fafc;
    --color-bg-card: #ffffff;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    /* 尺寸 */
    --max-width: 680px;
    --header-height: 64px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(12, 35, 64, 0.06);
    --shadow-md: 0 4px 12px rgba(12, 35, 64, 0.08);
    --shadow-lg: 0 12px 40px rgba(12, 35, 64, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.main-content {
    flex: 1;
    padding: 2rem 1rem 3rem;
    max-width: var(--max-width);
    margin: 0 auto;
    width: 100%;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ========== Header - 庄重导航 ========== */
.site-header {
    background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: var(--header-height);
}

.logo {
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    font-size: 1.2rem;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo::before {
    content: '';
    width: 5px;
    height: 20px;
    background: linear-gradient(180deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    border-radius: 3px;
}

.logo:hover {
    color: var(--color-accent-light);
}

/* 汉堡菜单按钮 - 仅移动端显示 */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: #fff;
    border-radius: 1px;
    transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 0.5rem;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: all 0.2s;
}

.nav-links a:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.15);
}

/* ========== 首页阶段展示 ========== */
.index-hero {
    text-align: center;
    padding: 2.5rem 1rem 2rem;
    margin: 0 -1rem 1.5rem;
    background: linear-gradient(180deg, rgba(12, 35, 64, 0.05) 0%, transparent 100%);
    border-radius: 0 0 24px 24px;
}

.index-hero .hero-badge {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--color-accent);
    letter-spacing: 0.12em;
    margin-bottom: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    background: rgba(201, 162, 39, 0.12);
    border-radius: 20px;
}

.index-hero .hero-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0 0 0.5rem;
}

.index-hero .hero-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* 投稿期 - 活动介绍海报（按屏幕比例自适应） */
.index-intro-poster {
    position: relative;
    width: 100%;
    margin: 0 -1rem;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
}

.index-intro-poster__img {
    width: 100%;
    height: auto;
    max-width: 100%;
    object-fit: contain;
    display: block;
    vertical-align: middle;
}

.index-intro-poster__placeholder {
    display: none;
    position: absolute;
    inset: 0;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: 0.08em;
}

/* 投稿期 - 我要投稿按钮：底部浮动显示 */
.index-submit-area {
    margin-top: 1rem;
    margin-bottom: 0;
    text-align: center;
}

.index-submit-area .btn-submit-cta {
    display: inline-block;
    min-width: 220px;
    max-width: 320px;
    min-height: 56px;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    line-height: 1.4;
}

.index-submit-area--float {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 50;
    padding: 1rem 1.5rem;
    padding-bottom: calc(2rem + env(safe-area-inset-bottom, 0));
    display: flex;
    justify-content: center;
    align-items: flex-end;
    pointer-events: none;
    margin: 0;
}

.index-submit-area--float .btn-submit-cta {
    pointer-events: auto;
}

body.has-submit-cta .main-content {
    padding-bottom: 5.5rem;
}

/* 投票期 - 作品展示墙（瀑布流，每行2列，自适应缩放） */
.gallery-wall {
    column-count: 2;
    column-gap: 1rem;
    margin-bottom: 2rem;
}

.gallery-card {
    break-inside: avoid;
    page-break-inside: avoid;
    margin-bottom: 1rem;
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    text-decoration: none;
    color: inherit;
    transition: all 0.2s;
    display: block;
}

.gallery-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.gallery-card__img {
    overflow: hidden;
    background: var(--color-bg);
    width: 100%;
}

.gallery-card__img img {
    width: 100%;
    height: auto;
    display: block;
    vertical-align: middle;
}

.gallery-card__info {
    padding: 0.75rem 1rem;
}

.gallery-card__no {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--color-primary);
}

.gallery-card__desc {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin: 0.35rem 0 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.index-actions {
    margin-bottom: 2rem;
}

.index-actions .btn-lg {
    padding: 1rem 1.5rem;
    font-size: 1.1rem;
    font-weight: 600;
}

/* 大屏：作品墙保持2列瀑布流，仅增大间距（用户要求每行2列） */
@media (min-width: 900px) {
    .gallery-wall {
        column-gap: 1.25rem;
        margin-bottom: 2rem;
    }
    .gallery-card {
        margin-bottom: 1.25rem;
    }
}

/* 画廊页 - 作品展示墙瀑布流 */
.gallery-masonry {
    column-count: 2;
    column-gap: 1rem;
    margin-bottom: 2rem;
}

.gallery-masonry .work-card {
    break-inside: avoid;
    page-break-inside: avoid;
    margin-bottom: 1rem;
}

.gallery-masonry .work-card img {
    width: 100%;
    height: auto;
}

@media (min-width: 900px) {
    .gallery-masonry {
        column-gap: 1.25rem;
    }
    .gallery-masonry .work-card {
        margin-bottom: 1.25rem;
    }
}

/* ========== Hero 区域（其他页面兼容） ========== */
.hero-section {
    text-align: center;
    padding: 3rem 1rem 2.5rem;
    margin: 0 -1rem 1.5rem;
    background: linear-gradient(180deg, rgba(12, 35, 64, 0.04) 0%, transparent 100%);
    border-radius: 0 0 24px 24px;
}

.hero-section .hero-badge {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--color-accent);
    letter-spacing: 0.12em;
    margin-bottom: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    background: rgba(201, 162, 39, 0.12);
    border-radius: 20px;
}

.hero-section .hero-title {
    font-size: 1.85rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0 0 0.5rem;
    letter-spacing: 0.02em;
}

.hero-section .hero-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    margin: 0 0 0;
    max-width: 420px;
    margin-left: auto;
    margin-right: auto;
}

/* ========== 入口卡片网格 ========== */
.entry-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.entry-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    text-decoration: none;
    color: inherit;
    transition: all 0.25s ease;
    box-shadow: var(--shadow-sm);
}

.entry-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.entry-card.primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-color: transparent;
    color: #fff;
}

.entry-card.primary:hover {
    border-color: transparent;
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.entry-card.disabled {
    opacity: 0.65;
    cursor: not-allowed;
    pointer-events: none;
}

.entry-card .icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--color-accent-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.entry-card.primary .icon {
    background: rgba(255, 255, 255, 0.25);
}

.entry-card .label {
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--color-primary);
}

.entry-card.primary .label {
    color: #fff;
}

.entry-card .desc {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 0.2rem;
}

.entry-card.primary .desc {
    color: rgba(255, 255, 255, 0.9);
}

/* ========== 截止时间条（半透明背景，宽度与活动说明/中间内容区一致） ========== */
.deadline-bar {
    background: rgba(12, 35, 64, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #fff;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    text-align: center;
    font-size: 0.95rem;
    max-width: var(--max-width);
    margin: 0 auto 0.75rem;
    width: 100%;
}

.deadline-bar strong {
    color: var(--color-accent-light);
}

/* ========== 表单卡片 ========== */
.form-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    margin-bottom: 1.5rem;
}

.form-card h1,
.form-card h2 {
    color: var(--color-primary);
    margin-top: 0;
    margin-bottom: 1.25rem;
    font-size: 1.5rem;
    font-weight: 700;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-accent-muted);
}

.form-card h3 {
    color: var(--color-primary);
    font-size: 1.1rem;
    margin: 1.5rem 0 0.75rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 500;
    color: var(--color-text);
}

.form-group label .required {
    color: #dc2626;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.65rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-accent-muted);
}

.form-group .hint {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-top: 0.35rem;
}

.form-group input[type="radio"],
.form-group input[type="checkbox"] {
    margin-right: 0.5rem;
    accent-color: var(--color-primary);
}

.form-group label:has(input[type="radio"]),
.form-group label:has(input[type="checkbox"]) {
    display: flex;
    align-items: flex-start;
    cursor: pointer;
    margin-bottom: 0.5rem;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-block;
    padding: 0.65rem 1.5rem;
    font-size: 1rem;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: all 0.2s;
    font-weight: 500;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: #fff;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
}

.btn-secondary {
    background: #fff;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-block {
    width: 100%;
    display: block;
}

.btns {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.btns .btn { flex: 1; min-width: 140px; }

/* ========== 声明区域 ========== */
.disclaimer-box {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    max-height: 280px;
    overflow-y: auto;
    margin-bottom: 1.25rem;
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ========== 上传 ========== */
.upload-zone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    padding: 2.5rem;
    text-align: center;
    background: var(--color-bg);
    cursor: pointer;
    transition: all 0.2s;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--color-primary);
    background: var(--color-accent-muted);
}

.upload-zone .hint {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* ========== 作品卡片 ========== */
.work-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    margin-bottom: 1.25rem;
    transition: box-shadow 0.2s;
}

.work-card:hover {
    box-shadow: var(--shadow-md);
}

.work-card img {
    width: 100%;
    height: auto;
    display: block;
}

.work-card .info {
    padding: 1.25rem;
}

.work-card .no {
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.35rem;
    font-size: 1.05rem;
}

.work-card .desc {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.work-card .hint {
    font-size: 0.8rem;
    color: var(--color-text-light);
    margin-top: 0.5rem;
}

.work-card-horizontal {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.work-card-horizontal img {
    max-width: 120px;
    flex-shrink: 0;
}

/* 数据统计卡片 */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-box {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    text-align: center;
    color: #fff;
}

.stat-num {
    font-size: 2.25rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
}

/* ========== 提示与错误 ========== */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.alert-info {
    background: rgba(37, 99, 235, 0.08);
    color: #1e40af;
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.08);
    color: #92400e;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.alert-error {
    background: rgba(220, 38, 38, 0.08);
    color: #991b1b;
    border: 1px solid rgba(220, 38, 38, 0.2);
}

.alert-success {
    background: rgba(34, 197, 94, 0.08);
    color: #065f46;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

/* ========== Footer（与顶部导航栏风格一致，保留底部安全区） ========== */
.site-footer {
    background: linear-gradient(180deg, var(--color-primary-light) 0%, var(--color-primary) 100%);
    color: rgba(255, 255, 255, 0.9);
    padding: 1.5rem;
    padding-bottom: calc(1.5rem + env(safe-area-inset-bottom, 0));
    text-align: center;
    font-size: 0.875rem;
    box-shadow: 0 -4px 12px rgba(12, 35, 64, 0.08);
    margin-top: auto;
}

.site-footer .container p {
    margin: 0;
}

/* ========== 页面标题通用 ========== */
.page-title {
    color: var(--color-primary);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 1rem;
}

/* ========== 移动端 ========== */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-primary);
        flex-direction: column;
        padding: 1rem;
        gap: 0;
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: max-height 0.3s, opacity 0.3s;
        box-shadow: var(--shadow-lg);
    }

    .nav-links.open {
        max-height: 400px;
        opacity: 1;
    }

    .nav-links a {
        display: block;
        padding: 1rem 1.25rem;
        font-size: 1rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .nav-links a:last-child {
        border-bottom: none;
    }

    body.nav-open {
        overflow: hidden;
    }

    /* 投稿期首页：去掉留白，活动图撑满画面 */
    body.index-contribution .main-content {
        padding: 0;
        padding-bottom: 2rem;
        max-width: none;
        width: 100%;
    }

    /* 移动端：活动宣传图左右撑满、去掉顶部和右侧留白 */
    body.index-contribution .index-intro-poster {
        width: 100vw;
        max-width: 100vw;
        margin: 0;
        margin-left: calc(-50vw + 50%);
        padding: 0;
        align-items: flex-start;
    }

    body.index-contribution .index-intro-poster__img {
        width: 100%;
        display: block;
        vertical-align: top;
    }

    body.index-contribution .form-card {
        margin: 0.75rem;
    }

    body.index-contribution .deadline-bar {
        margin: 0.75rem;
        width: calc(100% - 1.5rem);
        max-width: none;
    }

    body.index-contribution.has-submit-cta .main-content {
        padding-bottom: 5.5rem;
    }
}


@media (max-width: 640px) {
    .logo {
        font-size: 1.1rem;
    }

    .hero-section {
        padding: 2rem 0 1.5rem;
    }

    .hero-section .hero-badge {
        font-size: 0.75rem;
        letter-spacing: 0.1em;
    }

    .hero-section .hero-title {
        font-size: 1.75rem;
        line-height: 1.3;
    }

    .hero-section .hero-subtitle {
        font-size: 0.95rem;
        margin-bottom: 1.5rem;
    }

    .form-card {
        padding: 1.25rem;
    }

    /* 首页入口卡片 - 2列网格，类似 App 图标 */
    .entry-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
        margin-bottom: 1.5rem;
    }

    .entry-card {
        flex-direction: column;
        padding: 1rem 0.75rem;
        text-align: center;
        min-height: 110px;
    }

    .entry-card .icon {
        width: 44px;
        height: 44px;
        font-size: 1.4rem;
        margin: 0 auto;
    }

    .entry-card .label {
        font-size: 0.95rem;
    }

    .entry-card .desc {
        display: none;
    }

    .main-content {
        padding: 1.25rem 0.5rem 1.5rem;
    }

    body.index-contribution .main-content {
        padding: 0;
        padding-bottom: 2rem;
    }

    body.index-contribution.has-submit-cta .main-content {
        padding-bottom: 5.5rem;
    }

    .deadline-bar {
        padding: 0.875rem 1rem;
        font-size: 0.9rem;
        margin-bottom: 0.5rem;
    }

    /* 小屏：作品展示墙瀑布流自适应 */
    .gallery-wall,
    .gallery-masonry {
        column-gap: 0.75rem;
    }
    .gallery-card,
    .gallery-masonry .work-card {
        margin-bottom: 0.75rem;
    }
}