/* ============================================================
   业务运营中心帮助中心 — 全局样式
   ============================================================ */

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

:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #e8f0fe;
    --bg: #f8f9fa;
    --card-bg: #ffffff;
    --text: #333333;
    --text-secondary: #666666;
    --text-muted: #999999;
    --border: #e0e0e0;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-hover: 0 4px 20px rgba(0,0,0,0.12);
    --radius: 8px;
    --max-width: 1200px;
    --header-height: 60px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text);
    background: url('https://maas-log-prod.cn-wlcb.ufileos.com/anthropic/c2cad717-4c80-49e4-86d7-07224a896b28/f1f1c1cadc6fdf64a5df26a02bfc61de.jpg?UCloudPublicKey=TOKEN_e15ba47a-d098-4fbd-9afc-a0dcf0e4e621&Expires=1779939538&Signature=tBTjR2UcDKcEDVhO0FvTwVdwBLo=') center/cover no-repeat fixed;
    /* 备用背景，如果外部图片无法加载 */
    background-image: linear-gradient(135deg, #667eea 0%, #764ba2 100%), linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    background-blend-mode: overlay, normal;
    line-height: 1.7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* 毛玻璃蒙层 */
.body-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1); /* 更深的透明度 */
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    z-index: -1;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Header --- */
.site-header {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}
.logo-image {
    height: calc(var(--header-height) - 10px);
    width: auto;
    max-height: calc(var(--header-height) - 10px);
    max-width: 200px;
    object-fit: contain;
    background: transparent;
    padding: 0;
    border-radius: 0;
    box-shadow: none;
}
.logo:hover .logo-image {
    filter: brightness(1.05);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 4px;
}

.nav-links a {
    display: block;
    padding: 8px 14px;
    border-radius: var(--radius);
    font-size: 0.9rem;
    color: #333;
    transition: all 0.2s;
    white-space: nowrap;
}
.nav-links a:hover,
.nav-links a.active {
    background: var(--primary-light);
    color: var(--primary);
    text-decoration: none;
}

.nav-toggle { display: none; }

/* --- Hero & Search --- */
.hero {
    text-align: center;
    padding: 80px 20px 60px;
    position: relative;
    overflow: hidden;
    min-height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 0 0 50% 50% / 0 0 20px 20px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.8) 0%, rgba(118, 75, 162, 0.8) 100%);
    z-index: -1;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 800px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 40px;
}

.hero h1 {
    font-size: 3rem;
    color: #000000;
    margin-bottom: 16px;
    font-weight: 800;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: #333333;
    margin-bottom: 48px;
    line-height: 1.6;
    font-weight: 500;
}

.search-box {
    max-width: 600px;
    margin: 32px auto 0;
    display: flex;
    gap: 0;
    background: #ffffff;
    border-radius: 50px;
    padding: 6px;
    border: 1px solid #e0e0e0;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
}

.search-box input::placeholder {
    color: #999999;
}

.search-box input {
    flex: 1;
    padding: 16px 24px;
    border: none;
    border-radius: 50px 0 0 50px;
    font-size: 1rem;
    outline: none;
    background: #ffffff;
    color: #333333;
    transition: all 0.3s ease;
}
.search-box input:focus {
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(102,126,234,0.3);
}

.search-box button {
    padding: 16px 32px;
    background: #667eea;
    color: #ffffff;
    border: none;
    border-radius: 0 50px 50px 0;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 600;
}
.search-box button:hover {
    background: #5a67d8;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102,126,234,0.4);
}

.search-box button:active {
    transform: translateY(0);
}

/* Search Results Dropdown */
.search-results {
    max-width: 600px;
    margin: 8px auto 0;
    background: #ffffff;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.15);
    text-align: left;
    overflow: hidden;
    border: 1px solid #e0e0e0;
}

.search-results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    font-size: 0.9rem;
    color: #333333;
    border-bottom: 1px solid #e0e0e0;
    background: #f8f9fa;
}

.clear-search {
    background: none;
    border: none;
    color: #667eea;
    cursor: pointer;
    font-size: 0.9rem;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s ease;
    font-weight: 500;
}
.clear-search:hover {
    background: rgba(102,126,234,0.1);
}

.search-results ul {
    list-style: none;
    max-height: 400px;
    overflow-y: auto;
}

.search-results li + li { border-top: 1px solid rgba(0,0,0,0.08); }

.search-results li a {
    display: block;
    padding: 16px 20px;
    color: #333333;
    transition: all 0.3s ease;
    position: relative;
}
.search-results li a:hover {
    background: rgba(102,126,234,0.1);
    text-decoration: none;
    padding-left: 24px;
}
.search-results .result-title {
    font-weight: 600;
    display: block;
    color: #333333;
    font-size: 1rem;
}
.search-results .result-excerpt {
    font-size: 0.9rem;
    color: #666666;
    display: block;
    margin-top: 4px;
    line-height: 1.5;
}
.search-results .result-module {
    font-size: 0.85rem;
    color: #999999;
    display: block;
    margin-top: 4px;
}
.search-results mark {
    background: #fff3cd;
    color: #333333;
    padding: 2px 4px;
    border-radius: 4px;
    font-weight: 600;
}

/* --- Module Grid --- */
.module-grid {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.module-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.5);
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
    display: block;
    color: #333;
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
}
.module-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.module-card:hover::before {
    opacity: 1;
}
.module-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 48px rgba(31, 38, 135, 0.2);
    text-decoration: none;
    background: rgba(255,255,255,0.95);
}
.module-card:hover .card-icon {
    transform: translateY(-4px) rotate(5deg);
}

.card-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    transition: transform 0.3s ease;
}
.card-icon svg {
    width: 32px;
    height: 32px;
    fill: white;
}
.module-card:hover .card-icon {
    transform: translateY(-2px);
}

.module-card h2 {
    font-size: 1.4rem;
    margin-bottom: 16px;
    color: #333;
    font-weight: 600;
}

.module-card p {
    font-size: 1rem;
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* --- Module Page Layout --- */
.module-page { flex: 1; }

.breadcrumb {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 16px 20px 0;
    font-size: 0.85rem;
    color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb span { color: var(--text); }

.module-layout {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 20px;
    display: flex;
    gap: 30px;
}

.module-sidebar {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--header-height) + 20px);
    align-self: flex-start;
    max-height: calc(100vh - var(--header-height) - 40px);
    overflow-y: auto;
}

.module-sidebar h3 {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.module-sidebar ul { list-style: none; }

.module-sidebar a {
    display: block;
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: all 0.15s;
}
.module-sidebar a:hover,
.module-sidebar a.active {
    background: var(--primary-light);
    color: var(--primary);
    text-decoration: none;
}

.module-content {
    flex: 1;
    min-width: 0;
    padding-bottom: 40px;
}

.module-content h1 {
    font-size: 1.8rem;
    margin-bottom: 8px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-light);
}

.module-content h2 {
    font-size: 1.35rem;
    margin: 32px 0 12px;
    color: var(--text);
}

.module-content h3 {
    font-size: 1.1rem;
    margin: 24px 0 8px;
}

.module-content p { margin-bottom: 14px; }

.module-content ul, .module-content ol {
    margin-bottom: 14px;
    padding-left: 24px;
}

.module-content li { margin-bottom: 6px; }

.module-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 16px;
}

.module-content th, .module-content td {
    padding: 10px 14px;
    border: 1px solid var(--border);
    text-align: left;
}

.module-content th {
    background: var(--primary-light);
    font-weight: 600;
}

.module-content blockquote {
    border-left: 4px solid var(--primary);
    padding: 10px 16px;
    margin: 16px 0;
    background: var(--primary-light);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.module-content code {
    background: #f1f3f4;
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.88em;
}

.module-content pre {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 16px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin-bottom: 16px;
}
.module-content pre code { background: none; padding: 0; color: inherit; }

/* --- Tip / Warning Boxes --- */
.info-box {
    padding: 14px 18px;
    border-radius: var(--radius);
    margin: 16px 0;
    font-size: 0.93rem;
}
.info-box.tip { background: #e6f7e6; border-left: 4px solid #34a853; }
.info-box.warning { background: #fef7e0; border-left: 4px solid #f9ab00; }
.info-box.important { background: #fce8e6; border-left: 4px solid #ea4335; }

/* --- Footer --- */
.site-footer {
    text-align: center;
    padding: 20px;
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: auto;
}

/* 动画效果 */
.module-card {
    transition: all 0.3s ease;
}

/* 不同模块的渐变色主题 */
.module-card:nth-child(1) .card-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}
.module-card:nth-child(2) .card-icon {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}
.module-card:nth-child(3) .card-icon {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}
.module-card:nth-child(4) .card-icon {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}
.module-card:nth-child(5) .card-icon {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}
.module-card:nth-child(6) .card-icon {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}
.module-card:nth-child(2) { animation-delay: 0.5s; }
.module-card:nth-child(3) { animation-delay: 1s; }
.module-card:nth-child(4) { animation-delay: 1.5s; }
.module-card:nth-child(5) { animation-delay: 2s; }
.module-card:nth-child(6) { animation-delay: 2.5s; }

/* ============================================================
   Responsive — Tablet (768px - 1024px)
   ============================================================ */
@media (max-width: 1024px) {
    .hero h1 { font-size: 2.5rem; }
    .hero-subtitle { font-size: 1.1rem; }

    .module-grid {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
        gap: 24px;
        padding: 40px 20px;
    }

    .module-layout { flex-direction: column; }

    .module-sidebar {
        width: 100%;
        position: static;
        max-height: none;
        margin-bottom: 0;
    }

    .module-sidebar ul {
        display: flex;
        flex-wrap: wrap;
        gap: 4px;
    }

    .module-sidebar a {
        padding: 6px 12px;
        border: 1px solid var(--border);
        border-radius: 20px;
        font-size: 0.82rem;
    }
    .module-sidebar a:hover,
    .module-sidebar a.active {
        border-color: var(--primary);
    }
}

/* ============================================================
   Responsive — Mobile (< 768px)
   ============================================================ */
@media (max-width: 768px) {
    :root { --header-height: 54px; }

    .logo-image {
        height: calc(var(--header-height) - 10px);
        max-height: calc(var(--header-height) - 10px);
        padding: 0;
    }

    .body-overlay {
        background: rgba(173, 216, 230, 0.2);
    }

    .nav-links {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 12px 8px;
        box-shadow: 0 10px 40px rgba(0,0,0,0.2);
        border-bottom: 1px solid rgba(0,0,0,0.1);
    }
    .nav-links.open { display: flex; }

    .nav-toggle {
        display: flex;
        flex-direction: column;
        gap: 4px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 4px;
    }
    .nav-toggle span {
        display: block;
        width: 22px;
        height: 2px;
        background: #333;
        border-radius: 2px;
        transition: all 0.3s ease;
    }

    .nav-links a {
        color: #333;
    }
    .nav-toggle span.active:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .nav-toggle span.active:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle span.active:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .nav-links a {
        color: #333;
        padding: 12px 16px;
        margin: 2px 8px;
        border-radius: 8px;
    }
    .nav-links a:hover,
    .nav-links a.active {
        background: rgba(102, 126, 234, 0.1);
        color: #667eea;
    }

    .hero {
        padding: 40px 16px 30px;
        min-height: 400px;
    }
    .hero h1 {
        font-size: 2rem;
        color: #000000;
        font-weight: 800;
        text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    }
    .hero-subtitle {
        font-size: 1rem;
        margin-bottom: 32px;
        color: #333333;
        font-weight: 500;
        text-shadow: none;
    }

    .module-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 40px 16px;
    }

    .module-card {
        padding: 30px 20px;
    }
    .module-card h2 {
        font-size: 1.2rem;
    }
    .module-card p {
        font-size: 0.95rem;
    }

    .module-layout {
        padding: 16px;
    }
    .module-content h1 {
        font-size: 1.5rem;
    }
    .module-content h2 {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .module-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   Hero Text Contrast Enhancement
   ============================================================ */

/* Enhanced hero text contrast for better visibility */
.hero-content {
    position: relative;
}

/* Add a subtle border to hero content for better separation */
.hero-content::after {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.3) 0%, rgba(118, 75, 162, 0.3) 100%);
    border-radius: 26px;
    z-index: -1;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.hero-content:hover::after {
    opacity: 1;
}

/* Ensure hero text remains visible in all lighting conditions */
@media (prefers-color-scheme: dark) {
    .hero {
        background: rgba(0, 0, 0, 0.2);
    }

    .hero h1 {
        color: #ffffff;
        text-shadow: 0 2px 30px rgba(0, 0, 0, 0.6);
    }

    .hero-subtitle {
        color: rgba(255, 255, 255, 0.95);
        text-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .hero h1 {
        color: #ffffff;
        font-weight: 900;
        text-shadow: none;
        border: 2px solid #ffffff;
        padding: 8px 16px;
        display: inline-block;
    }

    .hero-subtitle {
        color: #ffffff;
        font-weight: 600;
        text-shadow: none;
    }
}

/* ============================================================
   Print Styles
   ============================================================ */
@media print {
    .site-header,
    .site-footer,
    .module-sidebar,
    .search-box,
    .search-results,
    .nav-toggle,
    .breadcrumb { display: none !important; }

    body { font-size: 12pt; color: #000; background: #fff; }

    .module-layout { display: block; }
    .module-content { max-width: 100%; }

    a { color: #000; text-decoration: underline; }
    .module-content pre { background: #f5f5f5; color: #000; border: 1px solid #ccc; }
    .info-box { border: 1px solid #ccc; background: none; }
}