/* ========================================
   全国单招百科全书 - 主样式文件
   ======================================== */

/* CSS变量定义 */
:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary: #8b5cf6;
    --accent: #06b6d4;
    --bg: #f8fafc;
    --card-bg: rgba(255, 255, 255, 0.85);
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: rgba(255, 255, 255, 0.3);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
}

/* 基础重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 18px;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-sub {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: -4px;
}

.nav-links {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    font-size: 15px;
    position: relative;
    transition: color 0.3s;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transition: width 0.3s;
    border-radius: 2px;
}

.nav-links a:hover {
    color: var(--primary);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 24px;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.user-name {
    font-weight: 500;
    color: var(--primary);
    font-size: 14px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text);
}

/* ========================================
   按钮样式
   ======================================== */
.btn {
    padding: 10px 24px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

/* ========================================
   轮播图区域 - 参考清华大学设计风格
   ======================================== */
.carousel {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.carousel-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 5;
    pointer-events: none;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    animation: float 20s infinite ease-in-out;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(180deg); }
}

.carousel-container {
    position: relative;
    width: 100%;
    min-height: 650px;
    max-height: 800px;
}

.carousel-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all 1.2s ease;
    padding: 120px 40px 60px;
}

.carousel-item.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.carousel-content {
    flex: 0 0 50%;
    padding-right: 40px;
    position: relative;
    z-index: 30;
    max-width: 650px;
}

.carousel-text {
    color: white;
}

.carousel-image {
    flex: 0 0 50%;
    width: min(640px, 100%);
    aspect-ratio: 16 / 9;
    height: auto;
    background-image: var(--carousel-bg);
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: transform 0.6s ease;
    background-color: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
}

.carousel-item.active .carousel-image {
    transform: translateX(0);
}

.carousel-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: var(--carousel-bg);
    background-size: cover;
    background-position: center;
    filter: blur(18px) saturate(1.1);
    transform: scale(1.08);
    opacity: 0.55;
    z-index: 0;
}

.carousel-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.18), rgba(0,0,0,0.04), transparent);
    z-index: 1;
    pointer-events: none;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 8px 20px;
    border-radius: 50px;
    color: white;
    font-size: 14px;
    margin-bottom: 32px;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.hero-badge span {
    width: 8px;
    height: 8px;
    background: #4ade80;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.carousel-text h1 {
    font-size: clamp(28px, 4vw, 48px);
    font-weight: 700;
    color: white;
    margin-bottom: 24px;
    line-height: 1.3;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
}

.carousel-text p {
    font-size: clamp(15px, 2vw, 18px);
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 36px;
    max-width: 600px;
    line-height: 1.8;
}

/* 轮播控制按钮 */
.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    color: white;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    z-index: 20;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-control:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-50%) scale(1.1);
}

.carousel-control.prev {
    left: 30px;
}

.carousel-control.next {
    right: 30px;
}

/* 轮播指示器 */
.carousel-indicators {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 20;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: white;
    width: 32px;
    border-radius: 6px;
}

/* 轮播项背景渐变 - 统一使用渐变背景 */
.carousel-item:nth-child(1) {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.carousel-item:nth-child(2) {
    background: linear-gradient(135deg, #7c3aed 0%, #4f46e5 100%);
}

.carousel-item:nth-child(3) {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
}

/* ========================================
   搜索框
   ======================================== */
.search-box {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-radius: 16px;
    padding: 6px;
    display: flex;
    gap: 6px;
    max-width: 600px;
    margin: 0 auto 28px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.6);
    position: relative;
    z-index: 35;
}

/* 轮播内表单使用真实 form 节点，避免 display:contents 导致部分浏览器无法提交；布局与原先一致 */
.carousel .search-box .carousel-search-form {
    display: flex;
    flex: 1;
    gap: 6px;
    align-items: center;
    min-width: 0;
}

.search-input-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 0 18px;
    gap: 12px;
}

.search-input-wrapper svg {
    color: var(--text-secondary);
    flex-shrink: 0;
}

.search-box input {
    flex: 1;
    border: none;
    background: none;
    font-size: 15px;
    outline: none;
    color: var(--text);
    height: 48px;
}

.search-box input::placeholder {
    color: var(--text-secondary);
}

.search-box .btn {
    padding: 12px 28px;
    border-radius: 12px;
    font-size: 15px;
}

/* ========================================
   热门标签
   ======================================== */
.hot-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.hot-tags span {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.tag {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 8px 16px;
    border-radius: 50px;
    color: white;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.tag:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

/* ========================================
   快速导航 - 参考清华大学卡片式网格布局
   ======================================== */
.quick-access {
    background: white;
    padding: 50px 24px;
    position: relative;
    z-index: 10;
    margin-top: -40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    border-radius: 20px 20px 0 0;
}

.quick-access-title {
    color: var(--text);
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
    text-align: center;
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
    max-width: 1400px;
    margin: 0 auto;
}

.quick-item {
    background: linear-gradient(145deg, #ffffff, #f8fafc);
    border-radius: 16px;
    padding: 20px 14px;
    text-align: center;
    color: var(--text);
    text-decoration: none;
    transition: all 0.3s;
    border: 1px solid rgba(0, 0, 0, 0.04);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.quick-item:hover {
    background: linear-gradient(145deg, #f8fafc, #ffffff);
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
    border-color: rgba(59, 130, 246, 0.2);
}

.quick-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    box-shadow: 0 3px 12px rgba(59, 130, 246, 0.25);
    flex-shrink: 0;
}

.quick-item span {
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    line-height: 1.4;
}

/* ========================================
   区块通用样式
   ======================================== */
.section {
    padding: 100px 24px;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 16px;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.section h2 {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text);
}

.section p {
    color: var(--text-secondary);
    font-size: 17px;
}

/* ========================================
   发现区域
   ======================================== */
.discover {
    background: linear-gradient(180deg, var(--bg) 0%, #f1f5f9 100%);
}

/* 发现区域三列：等宽、以中间为基准等高对齐 */
.discover-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
    align-items: stretch;
    justify-items: stretch;
}

.discover-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all 0.4s;
}

/* 仅发现区域三张卡：等高、对称，以中间为基准 */
#discover .discover-grid {
    align-items: stretch;
}

#discover .discover-card {
    display: flex;
    flex-direction: column;
    min-height: 360px;
}

#discover .card-header {
    flex-shrink: 0;
    margin-bottom: 20px;
    padding-bottom: 20px;
}

#discover .card-list {
    flex: 1;
    min-height: 0;
}

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

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.card-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.card-icon.blue { background: linear-gradient(135deg, #dbeafe, #bfdbfe); }
.card-icon.green { background: linear-gradient(135deg, #d1fae5, #a7f3d0); }
.card-icon.purple { background: linear-gradient(135deg, #ede9fe, #ddd6fe); }

.card-title {
    font-size: 18px;
    font-weight: 600;
}

.card-list {
    list-style: none;
}

.card-list li {
    display: flex;
    align-items: center;
    padding: 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.03);
    transition: all 0.3s;
}

.card-list li a.card-list-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 14px 0;
    color: inherit;
    text-decoration: none;
    cursor: pointer;
    transition: color 0.3s, background 0.3s;
}

.card-list li a.card-list-link:hover {
    color: var(--primary);
}

.card-list li:last-child {
    border-bottom: none;
}

.card-list li:hover {
    color: var(--primary);
}

.item-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.item-rank {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}

.rank-1 { background: linear-gradient(135deg, #fef3c7, #fde68a); color: #92400e; }
.rank-2 { background: linear-gradient(135deg, #f3f4f6, #e5e7eb); color: #4b5563; }
.rank-3 { background: linear-gradient(135deg, #fed7aa, #fdba74); color: #9a3412; }
.rank-other { background: #f1f5f9; color: var(--text-secondary); }

.item-name {
    font-size: 14px;
    font-weight: 500;
}

.item-meta {
    font-size: 12px;
    color: var(--text-secondary);
}

.item-tag {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
}

.tag-hot { background: #fef2f2; color: #dc2626; }
.tag-new { background: #eff6ff; color: var(--primary); }
.tag-recommend { background: #f0fdf4; color: #16a34a; }
.tag-blue { background: #eff6ff; color: #2563eb; border: 1px solid #bfdbfe; }

/* ========================================
   数据统计区域
   ======================================== */
.stats {
    background: linear-gradient(135deg, #1e1b4b 0%, #312e81 50%, #4338ca 100%);
    padding: 80px 24px;
    position: relative;
    overflow: hidden;
}

.stats::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23ffffff' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.stat-item {
    text-align: center;
    color: white;
}

.stat-icon {
    width: 64px;
    height: 64px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-number {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff, #c7d2fe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
}

/* ========================================
   为什么选择单招
   ======================================== */
.why-section {
    background: white;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.why-card {
    background: linear-gradient(145deg, #ffffff, #f8fafc);
    border-radius: 24px;
    padding: 40px 30px;
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.4s;
    position: relative;
    overflow: hidden;
}

.why-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: transform 0.4s;
}

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

.why-card:hover::before {
    transform: scaleX(1);
}

.why-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 36px;
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.why-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.why-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   学历提升区域
   ======================================== */
.upgrade {
    background: linear-gradient(180deg, #f1f5f9 0%, var(--bg) 100%);
}

.upgrade-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
    align-items: center;
}

.upgrade-text h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text);
}

.upgrade-text > p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.8;
}

.feature-list {
    list-style: none;
    margin-bottom: 32px;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 15px;
}

.feature-list li::before {
    content: '✓';
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #dcfce7, #bbf7d0);
    color: #16a34a;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.upgrade-actions {
    display: flex;
    gap: 16px;
}

.upgrade-visual {
    position: relative;
}

.upgrade-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 40px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.upgrade-icon {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, #dbeafe, #c7d2fe);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 56px;
}

.upgrade-card h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
}

.upgrade-card p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ========================================
   优势网格
   ======================================== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.advantage-item {
    background: white;
    border-radius: 20px;
    padding: 32px;
    text-align: center;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.advantage-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.advantage-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 28px;
}

.advantage-item:nth-child(1) .advantage-icon { background: #fef3c7; }
.advantage-item:nth-child(2) .advantage-icon { background: #dbeafe; }
.advantage-item:nth-child(3) .advantage-icon { background: #fce7f3; }
.advantage-item:nth-child(4) .advantage-icon { background: #d1fae5; }
.advantage-item:nth-child(5) .advantage-icon { background: #ede9fe; }
.advantage-item:nth-child(6) .advantage-icon { background: #fee2e2; }

.advantage-item h4 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 8px;
}

.advantage-item p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ========================================
   合作机构
   ======================================== */
.partners {
    background: white;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.partner-card {
    background: linear-gradient(145deg, #ffffff, #f8fafc);
    border-radius: 24px;
    padding: 36px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.4s;
}

.partner-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.partner-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.partner-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.partner-card:nth-child(1) .partner-icon { background: linear-gradient(135deg, #dbeafe, #bfdbfe); }
.partner-card:nth-child(2) .partner-icon { background: linear-gradient(135deg, #d1fae5, #a7f3d0); }
.partner-card:nth-child(3) .partner-icon { background: linear-gradient(135deg, #ede9fe, #ddd6fe); }

.partner-header h4 {
    font-size: 18px;
    font-weight: 600;
}

.partner-header p {
    font-size: 13px;
    color: var(--text-secondary);
}

.partner-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
}

.partner-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.partner-tag {
    padding: 6px 12px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    font-size: 12px;
    border-radius: 6px;
    font-weight: 500;
}

/* ========================================
   学员案例
   ======================================== */
.cases {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    padding: 100px 24px;
}

.cases .section-header h2,
.cases .section-header p {
    color: white;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.case-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 32px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.4s;
}

.case-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.case-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.case-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    font-weight: 600;
}

.case-info h4 {
    color: white;
    font-size: 17px;
    font-weight: 600;
}

.case-info p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 13px;
}

.case-content {
    color: rgba(255, 255, 255, 0.85);
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.case-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.case-tag {
    padding: 6px 14px;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.9);
    font-size: 12px;
    border-radius: 50px;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: #0f172a;
    color: white;
    padding: 80px 24px 40px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto 60px;
}

.footer-brand .logo-icon {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.footer-brand .logo-text {
    background: linear-gradient(135deg, #fff, #c7d2fe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    line-height: 1.8;
    margin-top: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s;
}

.social-link:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.footer-links h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 24px;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: white;
}

.footer-qr {
    text-align: center;
}

.qr-code {
    width: 120px;
    height: 120px;
    background: white;
    border-radius: 16px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--text);
}

.footer-qr p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 40px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 13px;
}

/* ========================================
   响应式设计
   ======================================== */
@media (max-width: 1024px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }

    /* 平板端轮播图优化 */
    .carousel-container {
        min-height: 580px;
        max-height: 720px;
    }

    .carousel-item {
        padding: 100px 30px 50px;
    }

    .carousel-content {
        padding-right: 30px;
        max-width: 550px;
    }

    .carousel-image {
        width: min(560px, 100%);
    }

    .search-box {
        max-width: 550px;
    }

    .quick-grid {
        grid-template-columns: repeat(6, 1fr);
        gap: 14px;
    }

    /* 优化手机端导航栏布局 */
    .nav-container {
        padding: 0 16px;
        height: 64px;
    }

    .logo {
        gap: 8px;
    }

    .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }

    .logo-text {
        font-size: 16px;
    }

    .logo-sub {
        font-size: 10px;
        margin-top: -2px;
    }

    .nav-right {
        gap: 8px;
    }

    .nav-right .btn {
        padding: 8px 12px;
        font-size: 12px;
    }

    .user-info {
        padding: 6px 12px;
        font-size: 12px;
    }
    
    .user-name {
        font-size: 12px;
    }

    /* 轮播图响应式 */
    .carousel-item {
        flex-direction: column;
        text-align: center;
    }
    
    .carousel-content {
        flex: 1;
        padding: 100px 24px 40px;
        width: 100%;
    }
    
    .carousel-image {
        flex: 1;
        width: 100%;
    }
    
    .carousel-text {
        max-width: 100%;
        margin: 0 auto;
    }

    .quick-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
        max-width: 700px;
    }
    
    .quick-item {
        padding: 20px 12px;
    }
    
    .quick-icon {
        width: 48px;
        height: 48px;
        font-size: 24px;
    }
    
    .quick-item span {
        font-size: 13px;
    }

    .discover-grid,
    .why-grid,
    .partners-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .upgrade-content {
        grid-template-columns: 1fr;
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    /* 轮播图小屏幕优化 - 采用垂直布局 */
    .carousel-container {
        min-height: 0;
        max-height: none;
    }

    .carousel-item {
        /* 手机端改为“仅展示 active 且高度自适应”，避免文字被固定高度裁切 */
        position: relative;
        height: auto;
        display: none;
        opacity: 1;
        visibility: visible;
        flex-direction: column;
        padding: 92px 20px 40px;
    }

    .carousel-item.active {
        display: flex;
    }

    .carousel-content {
        flex: none;
        padding-right: 0;
        text-align: center;
        max-width: 100%;
        margin-bottom: 30px;
    }

    .carousel-text {
        align-items: center;
        display: flex;
        flex-direction: column;
    }

    .carousel-image {
        flex: none;
        width: 100%;
        max-width: 400px;
    }

    .search-box {
        max-width: 100%;
        margin: 0 auto 20px;
    }

    .carousel-control {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }

    .carousel-control.prev {
        left: 15px;
    }

    .carousel-control.next {
        right: 15px;
    }

    .carousel-indicators {
        bottom: 20px;
    }

    .quick-access {
        /* 避免与轮播区域在小屏重叠 */
        margin-top: 0;
    }

    .quick-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
        max-width: 400px;
    }

    .quick-item {
        padding: 16px 8px;
    }

    .quick-icon {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .quick-item span {
        font-size: 12px;
    }
}

@media (max-width: 640px) {
    .carousel-container {
        min-height: 0;
        max-height: none;
    }

    .carousel-content {
        padding: 76px 16px 0;
    }

    .carousel-image {
        width: 100%;
    }

    .search-box {
        flex-direction: column;
        padding: 12px;
    }

    .carousel .search-box .carousel-search-form {
        flex-direction: column;
        width: 100%;
    }

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

    .quick-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .quick-access {
        margin-top: 0;
    }

    /* 进一步优化小屏幕导航栏 */
    .nav-container {
        padding: 0 12px;
        height: 56px;
    }
    
    .logo-icon {
        width: 32px;
        height: 32px;
        font-size: 14px;
        border-radius: 8px;
    }
    
    .logo-text {
        font-size: 14px;
    }
    
    .logo-sub {
        font-size: 9px;
        margin-top: -1px;
    }
    
    .nav-right {
        gap: 6px;
    }
    
    .nav-right .btn {
        padding: 6px 10px;
        font-size: 11px;
        min-width: auto;
    }
    
    /* 优化按钮显示，避免过多文字 */
    .nav-right .btn-outline,
    .nav-right .btn-primary {
        padding: 6px 8px !important;
        font-size: 11px !important;
    }
    
    /* 免费咨询按钮在小屏上只显示图标 */
    .nav-right .btn-primary[href*="consult"] {
        padding: 6px !important;
        min-width: 32px !important;
        color: transparent !important;
        overflow: hidden;
        position: relative;
    }
    
    .nav-right .btn-primary[href*="consult"]::after {
        content: '📞';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        color: white;
        font-size: 14px;
    }
    
    .user-info {
        padding: 4px 8px;
        font-size: 11px;
    }
    
    .user-name {
        font-size: 11px;
    }
    
    .mobile-menu-btn {
        font-size: 20px;
        padding: 6px;
        min-width: 36px;
    }

    .quick-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
        max-width: 100%;
    }

    .quick-item {
        padding: 14px 6px;
    }

    .quick-icon {
        width: 36px;
        height: 36px;
        font-size: 18px;
        border-radius: 10px;
    }
    
    .quick-item span {
        font-size: 11px;
    }
    
    .hot-tags {
        gap: 8px;
    }
    
    .hot-tags span:first-child {
        display: none;
    }

    .section {
        padding: 60px 16px;
    }

    .discover-grid,
    .why-grid,
    .partners-grid,
    .cases-grid,
    .stats-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .upgrade-actions {
        flex-direction: column;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .stat-number {
        font-size: 32px;
    }
}

/* 超小屏幕优化 - 针对手机端导航栏进一步优化 */
@media (max-width: 480px) {
    .nav-container {
        padding: 0 10px;
        height: 52px;
    }
    
    .logo-icon {
        width: 28px;
        height: 28px;
        font-size: 12px;
        border-radius: 6px;
    }
    
    .logo-text {
        font-size: 12px;
    }
    
    .logo-sub {
        display: none; /* 在超小屏幕上隐藏副标题 */
    }
    
    .nav-right {
        gap: 4px;
    }
    
    /* 登录/注册按钮显示完整文字 */
    .nav-right .btn-outline {
        padding: 6px 10px !important;
        min-width: 45px !important;
        position: relative;
    }
    
    .nav-right .btn-primary {
        padding: 6px 10px !important;
        min-width: 45px !important;
        position: relative;
    }
    
    /* 在超小屏幕上完全隐藏按钮原始文字，用伪元素替代 */
    .nav-right .btn-outline,
    .nav-right .btn-primary {
        color: transparent !important;
        overflow: hidden;
    }
    
    /* 登录按钮显示'登录' */
    .nav-right .btn-outline::after {
        content: '登录';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        color: #2563eb;
        font-size: 11px;
        font-weight: 500;
        white-space: nowrap;
    }
    
    /* 注册按钮显示'注册' */
    .nav-right .btn-primary::after {
        content: '注册';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        color: white;
        font-size: 11px;
        font-weight: 500;
        white-space: nowrap;
    }
    
    /* 免费咨询按钮特殊处理 */
    .nav-right .btn-primary[href*="consult"]::after {
        content: '📞';
        font-size: 12px;
    }
    
    /* 免费咨询按钮保持图标 */
    .nav-right .btn-primary:last-child {
        padding: 6px !important;
        min-width: 28px !important;
    }
    
    .nav-right .btn-primary:last-child::after {
        content: '📞';
        font-size: 12px;
    }
    
    .mobile-menu-btn {
        font-size: 18px;
        padding: 4px;
        min-width: 32px;
    }
    
    /* 隐藏用户信息中的用户名，只保留按钮 */
    .user-info .user-name {
        display: none;
    }
    
    .user-info .btn-outline {
        padding: 4px 8px !important;
        font-size: 10px !important;
    }
}

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

.animate {
    animation: fadeInUp 0.6s ease forwards;
}

/* ========================================
   登录注册页面样式
   ======================================== */
.auth-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-card {
    background: white;
    padding: 60px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.auth-side {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 60px 40px;
    display: flex;
    align-items: center;
    color: white;
}

.auth-header {
    text-align: center;
    margin-bottom: 40px;
}

.auth-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    margin-bottom: 30px;
}

.auth-logo .logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    font-weight: bold;
}

.auth-logo .logo-text {
    font-size: 18px;
    font-weight: 700;
    color: #1f2937;
}

.auth-logo .logo-sub {
    font-size: 12px;
    color: #6b7280;
}

.auth-header h1 {
    font-size: 32px;
    color: #1f2937;
    margin: 10px 0;
}

.auth-header p {
    color: #6b7280;
    font-size: 16px;
}

.auth-form {
    max-width: 400px;
    margin: 0 auto;
    width: 100%;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #374151;
    margin-bottom: 8px;
}

.required {
    color: #ef4444;
    margin-left: 2px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.password-input {
    position: relative;
}

.password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    font-size: 16px;
    color: #6b7280;
}

.phone-input {
    display: flex;
    gap: 12px;
}

.phone-input input {
    flex: 1;
}

.btn-sms {
    padding: 12px 20px;
    background: #f3f4f6;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    color: #374151;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.btn-sms:hover:not(:disabled) {
    background: #e5e7eb;
}

.btn-sms:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.password-strength {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 8px;
}

.strength-bar {
    height: 4px;
    flex: 1;
    background: #e5e7eb;
    border-radius: 2px;
    transition: background-color 0.3s ease;
}

.strength-text {
    font-size: 12px;
    color: #6b7280;
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
    color: #374151;
}

.checkbox input[type="checkbox"] {
    width: 16px;
    height: 16px;
    margin: 0;
}

.forgot-password {
    font-size: 14px;
    color: #667eea;
    text-decoration: none;
}

.forgot-password:hover {
    text-decoration: underline;
}

.btn-block {
    width: 100%;
    padding: 14px;
    font-size: 16px;
}

.auth-divider {
    position: relative;
    text-align: center;
    margin: 30px 0;
}

.auth-divider::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    right: 0;
    height: 1px;
    background: #e5e7eb;
}

.auth-divider span {
    display: inline-block;
    padding: 0 20px;
    background: white;
    color: #6b7280;
    font-size: 14px;
    position: relative;
    z-index: 1;
}

.social-login {
    display: flex;
    gap: 12px;
    margin-bottom: 30px;
}

.social-btn {
    flex: 1;
    padding: 14px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    background: white;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.social-btn:hover {
    background: #f9fafb;
    border-color: #9ca3af;
}

.social-btn.wechat {
    color: #07c160;
}

.social-btn.qq {
    color: #12b7f5;
}

.auth-footer {
    text-align: center;
    margin-top: auto;
}

.auth-footer p {
    color: #6b7280;
    font-size: 14px;
    margin: 8px 0;
}

.auth-footer a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.auth-footer a:hover {
    text-decoration: underline;
}

.auth-footer .terms {
    font-size: 12px;
}

.auth-side-content {
    max-width: 500px;
    margin: 0 auto;
}

.auth-side h2 {
    font-size: 28px;
    margin-bottom: 30px;
    font-weight: 700;
}

.auth-features {
    list-style: none;
    padding: 0;
    margin: 0 0 40px 0;
}

.auth-features li {
    padding: 12px 0;
    font-size: 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.auth-features li:last-child {
    border-bottom: none;
}

.auth-features li strong {
    font-weight: 600;
}

.register-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    text-align: center;
}

.stat-item {
    padding: 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
}

.stat-item .stat-number {
    font-size: 28px;
    font-weight: 700;
    color: white;
    margin-bottom: 4px;
}

.stat-item .stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .auth-container {
        grid-template-columns: 1fr;
    }
    
    .auth-side {
        display: none;
    }
    
    .auth-card {
        padding: 40px 20px;
    }
    
    .social-login {
        flex-direction: column;
    }
    
    .phone-input {
        flex-direction: column;
    }
    
    .btn-sms {
        width: 100%;
    }
    
    .register-stats {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .auth-features li {
        font-size: 14px;
    }
    
    .auth-header h1 {
        font-size: 28px;
    }
}

/* ======================================== 资源中心 */
#resources {
    background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
    padding: 100px 24px;
}

#resources .section-header h2 {
    font-size: clamp(32px, 4vw, 48px);
    margin-bottom: 20px;
}

#resources .section-header p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 0;
}

#resources .discover-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px 32px;
    max-width: 1200px;
    margin: 60px auto 0;
    align-items: stretch;
}

#resources .discover-card {
    background: white;
    border-radius: 24px;
    padding: 28px 24px 32px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 320px;
}

#resources .discover-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: transform 0.4s;
}

#resources .discover-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

#resources .discover-card:hover::before {
    transform: scaleX(1);
}

#resources .card-header {
    margin-bottom: 28px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    gap: 16px;
}

#resources .card-icon {
    width: 56px;
    height: 56px;
    border-radius: 18px;
    font-size: 28px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
}

#resources .card-icon.blue {
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    color: var(--primary);
}

#resources .card-icon.green {
    background: linear-gradient(135deg, #d1fae5, #a7f3d0);
    color: #16a34a;
}

#resources .card-icon.purple {
    background: linear-gradient(135deg, #ede9fe, #ddd6fe);
    color: var(--secondary);
}

#resources .card-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text);
    margin: 0;
}

#resources .card-list {
    list-style: none;
    padding: 0;
    margin: 0;
    flex: 1;
    min-height: 0;
}

#resources .card-list li {
    padding: 14px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    cursor: pointer;
}

#resources .card-list li:last-child {
    border-bottom: none;
}

#resources .card-list li:hover {
    color: var(--primary);
    background: rgba(59, 130, 246, 0.05);
    border-radius: 12px;
    margin: 0 -12px;
    padding: 18px 12px;
    transform: translateX(4px);
}

#resources .item-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    min-width: 0;
}

#resources .item-name {
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s;
    flex: 1;
    line-height: 1.45;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#resources .item-tag {
    padding: 6px 14px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
    min-width: 52px;
    text-align: center;
    border: 1px solid transparent;
}

#resources .item-tag.tag-hot {
    background: #fef2f2;
    color: #dc2626;
    border-color: #fee2e2;
}

#resources .item-tag.tag-new {
    background: #eff6ff;
    color: var(--primary);
    border-color: #dbeafe;
}

#resources .item-tag.tag-recommend {
    background: #f0fdf4;
    color: #16a34a;
    border-color: #dcfce7;
}

#resources .item-tag.tag-blue {
    background: #eff6ff;
    color: #2563eb;
    border-color: #bfdbfe;
}

#resources .card-list li:hover .item-tag {
    transform: scale(1.05);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.3);
}

/* 在线咨询卡片特殊样式 */
#resources .discover-card:last-child .feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

#resources .discover-card:last-child .feature-list li {
    padding: 18px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.03);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
}

#resources .discover-card:last-child .feature-list li:last-child {
    border-bottom: none;
}

#resources .discover-card:last-child .feature-list li:hover {
    color: var(--primary);
    background: rgba(59, 130, 246, 0.05);
    border-radius: 12px;
    margin: 0 -12px;
    padding: 18px 12px;
    transform: translateX(4px);
}

#resources .discover-card:last-child .feature-list li span:last-child {
    font-size: 18px;
    transition: transform 0.3s;
}

#resources .discover-card:last-child .feature-list li:hover span:last-child {
    transform: translateX(4px);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    #resources .discover-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px 20px;
        max-width: 100%;
    }
    
    #resources .discover-card {
        min-height: 280px;
    }
    
    #resources .card-title {
        font-size: 20px;
    }
    
    #resources .card-icon {
        width: 52px;
        height: 52px;
        font-size: 24px;
    }
}

@media (max-width: 768px) {
    #resources {
        padding: 60px 16px;
    }
    
    #resources .section-header h2 {
        font-size: 28px;
    }
    
    #resources .section-header p {
        font-size: 16px;
    }
    
    #resources .discover-grid {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 40px;
        max-width: 100%;
    }

    #resources .discover-card {
        padding: 24px;
        min-height: 260px;
    }
    
    #resources .card-header {
        margin-bottom: 20px;
        padding-bottom: 20px;
    }
    
    #resources .card-icon {
        width: 48px;
        height: 48px;
        font-size: 22px;
    }
    
    #resources .card-title {
        font-size: 18px;
    }
    
    #resources .card-list li {
        padding: 16px 0;
    }
    
    #resources .card-list li:hover {
        margin: 0 -8px;
        padding: 16px 8px;
    }
    
    #resources .item-name {
        font-size: 15px;
    }
    
    #resources .item-tag {
        padding: 6px 12px;
        font-size: 12px;
    }
}