/* ============================================
   AI瞄准 v2.0 - 科技感暗色主题
   流星 · 粒子 · 扫描线 · 点击波纹 · 过渡动画
   ============================================ */

:root {
    --bg-deep: #06060f;
    --bg-card: rgba(12, 12, 30, 0.7);
    --bg-card-hover: rgba(18, 18, 45, 0.85);
    --border-glow: rgba(80, 120, 255, 0.25);
    --border-glow-strong: rgba(100, 140, 255, 0.55);
    --text-primary: #e0e6ff;
    --text-secondary: #8890b8;
    --accent-blue: #4a7dff;
    --accent-purple: #8b5cf6;
    --accent-cyan: #00d4ff;
    --gradient-1: linear-gradient(135deg, #4a7dff, #8b5cf6);
    --gradient-2: linear-gradient(135deg, #8b5cf6, #00d4ff);
    --shadow-glow: 0 0 20px rgba(74,125,255,0.15);
    --shadow-glow-hover: 0 0 40px rgba(74,125,255,0.35), 0 0 80px rgba(139,92,246,0.15);
    --radius: 14px;
    --radius-sm: 8px;
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.7;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 扫描线覆盖层 */
body::after {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,0,0,0.03) 2px, rgba(0,0,0,0.03) 4px);
    pointer-events: none;
    z-index: 9998;
    opacity: 0.6;
}

/* Canvas 粒子+流星背景 */
#particles-canvas {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* 点击波纹容器 */
.click-ripple {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    border: 2px solid rgba(74,125,255,0.8);
    border-radius: 50%;
    animation: ripple-out 0.9s ease-out forwards;
}
@keyframes ripple-out {
    0% { width: 0; height: 0; opacity: 1; }
    100% { width: 150px; height: 150px; opacity: 0; margin-left: -75px; margin-top: -75px; }
}

.content-wrapper { position: relative; z-index: 1; }

/* 页面过渡动画 */
.page-transition {
    animation: page-in 0.5s ease;
}
@keyframes page-in {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 导航栏 */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(8, 8, 20, 0.82);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border-glow);
    transition: var(--transition);
}
.navbar.scrolled {
    background: rgba(8, 8, 20, 0.95);
    border-bottom-color: var(--border-glow-strong);
    box-shadow: 0 4px 30px rgba(74,125,255,0.12);
}
.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 clamp(1rem, 4vw, 2rem);
    max-width: 1280px;
    margin: 0 auto;
    height: 64px;
}
.nav-brand {
    display: flex; align-items: center; gap: 10px;
    text-decoration: none;
    font-size: 1.5rem; font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    letter-spacing: 2px;
    animation: brand-pulse 3s ease-in-out infinite;
}
@keyframes brand-pulse {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.3); }
}
.nav-brand .brand-icon {
    width: 36px; height: 36px;
    border-radius: 8px;
    background: var(--gradient-1);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
    -webkit-text-fill-color: #fff; color: #fff;
}
.nav-links { display: flex; list-style: none; gap: 2rem; align-items: center; }
.nav-links a {
    color: var(--text-secondary); text-decoration: none;
    font-size: 0.95rem; font-weight: 500;
    position: relative;
    transition: var(--transition);
    padding: 4px 0;
}
.nav-links a::after {
    content: '';
    position: absolute; bottom: -2px; left: 0; width: 0; height: 2px;
    background: var(--gradient-1);
    border-radius: 1px;
    transition: width 0.3s ease;
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

/* 用户菜单 */
.user-menu {
    position: relative;
}
.user-menu-btn {
    background: none; border: 1px solid var(--border-glow);
    color: var(--text-primary); cursor: pointer;
    padding: 6px 14px; border-radius: 50px;
    font-size: 0.88rem; font-family: inherit;
    transition: var(--transition);
    display: flex; align-items: center; gap: 6px;
}
.user-menu-btn:hover { border-color: var(--accent-blue); background: rgba(74,125,255,0.1); }
.user-dropdown {
    display: none;
    position: absolute;
    top: 110%; right: 0;
    background: rgba(12,12,30,0.97);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-sm);
    padding: 0.5rem 0;
    min-width: 140px;
    backdrop-filter: blur(20px);
    z-index: 1100;
}
.user-dropdown.show { display: block; animation: modal-in 0.2s ease; }
.user-dropdown a {
    display: block;
    padding: 8px 18px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.88rem;
    transition: var(--transition);
}
.user-dropdown a:hover { background: rgba(74,125,255,0.1); color: var(--text-primary); }

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column; gap: 5px;
    cursor: pointer; background: none; border: none; padding: 4px;
}
.hamburger span {
    display: block; width: 26px; height: 2px;
    background: var(--text-primary); border-radius: 2px;
    transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* Hero */
.hero {
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    text-align: center;
    padding: 120px clamp(1rem, 4vw, 2rem) 80px;
    position: relative;
}
.hero-content { max-width: 800px; }
.hero-badge {
    display: inline-block;
    padding: 6px 20px;
    border: 1px solid var(--border-glow);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--accent-cyan);
    margin-bottom: 1.5rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    animation: glow-pulse 2s ease-in-out infinite;
}
@keyframes glow-pulse {
    0%, 100% { box-shadow: 0 0 8px rgba(0,212,255,0.2); }
    50% { box-shadow: 0 0 20px rgba(0,212,255,0.5); }
}
.hero h1 {
    font-size: clamp(2.2rem, 6vw, 4rem);
    font-weight: 800;
    margin-bottom: 1.5rem; line-height: 1.2;
    background: var(--gradient-2);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    letter-spacing: 2px;
    animation: title-shine 4s ease-in-out infinite;
}
@keyframes title-shine {
    0%, 100% { filter: brightness(1) saturate(1); }
    50% { filter: brightness(1.4) saturate(1.3); }
}
.hero p {
    font-size: clamp(0.95rem, 2vw, 1.2rem);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto; margin-right: auto;
}

/* 按钮 */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 32px;
    font-size: 1rem; font-weight: 600;
    border-radius: var(--radius-sm);
    text-decoration: none; cursor: pointer; border: none;
    transition: var(--transition);
    letter-spacing: 1px;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}
.btn::before {
    content: '';
    position: absolute; top: 50%; left: 50%;
    width: 0; height: 0;
    background: rgba(255,255,255,0.15);
    border-radius: 50%;
    transition: width 0.6s, height 0.6s, margin 0.6s;
    transform: translate(-50%, -50%);
}
.btn:active::before {
    width: 300px; height: 300px;
    margin-left: -150px; margin-top: -150px;
}
.btn-primary {
    background: var(--gradient-1);
    color: #fff;
    box-shadow: 0 4px 20px rgba(74,125,255,0.3);
}
.btn-primary:hover {
    box-shadow: var(--shadow-glow-hover);
    transform: translateY(-2px);
}
.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-glow);
}
.btn-outline:hover {
    border-color: var(--accent-blue);
    background: rgba(74,125,255,0.08);
    box-shadow: var(--shadow-glow);
}
.btn-purchase {
    background: linear-gradient(135deg, #ff5252, #ee5a24);
    color: #fff;
    font-size: 1.15rem; padding: 15px 50px;
    box-shadow: 0 4px 25px rgba(255,82,82,0.4);
    animation: pulse-btn 2s infinite;
}
.btn-purchase:hover {
    box-shadow: 0 6px 45px rgba(255,82,82,0.6);
    transform: translateY(-3px);
}
@keyframes pulse-btn {
    0%,100%{box-shadow:0 4px 25px rgba(255,82,82,0.4)}
    50%{box-shadow:0 4px 50px rgba(255,82,82,0.7)}
}
.btn-sm { padding: 7px 16px; font-size: 0.85rem; }
.btn-danger { background: linear-gradient(135deg,#ff4757,#c0392b); color:#fff; }
.btn-danger:hover{box-shadow:0 4px 20px rgba(255,71,87,0.4)}
.btn-success{background:linear-gradient(135deg,#2ed573,#1eaa59);color:#fff}
.btn-warning{background:linear-gradient(135deg,#ffa502,#e67e22);color:#fff}

/* 区块标题 */
.section-title { text-align:center; margin-bottom:3rem; }
.section-title h2 {
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    font-weight: 700; margin-bottom:0.8rem;
    background: var(--gradient-1);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.section-title p { color:var(--text-secondary); font-size:1rem; }

/* 卡片网格 */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1200px; margin: 0 auto;
    padding: 0 clamp(1rem, 3vw, 1.5rem);
}

/* 科技感卡片 */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition);
    overflow: hidden;
    position: relative;
}
.card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0;
    height: 1px;
    background: var(--gradient-1);
    opacity: 0;
    transition: opacity 0.3s ease;
}
.card::after {
    content: '';
    position: absolute; top: 0; left: 0; right: 0; bottom: 0;
    border-radius: inherit;
    background: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(74,125,255,0.06), transparent 40%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-glow-hover); border-color: var(--border-glow-strong); background: var(--bg-card-hover); }
.card:hover::before { opacity: 1; }
.card-body { padding: clamp(1.2rem, 3vw, 1.8rem); }
.card-icon { font-size: 2.5rem; margin-bottom: 1rem; display: block; }
.card-title { font-size: 1.2rem; font-weight: 600; margin-bottom: 0.6rem; color: var(--text-primary); }
.card-text { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.6; }

/* 项目卡片 */
.project-card { cursor: pointer; }
.project-card .card-image {
    width: 100%; height: 200px; object-fit: cover;
    background: linear-gradient(135deg, #1a1a3a, #0d0d2b);
    display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
}
.project-card .card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.project-card:hover .card-image img { transform: scale(1.05); }
.project-card .card-image .placeholder-icon { font-size: 3rem; opacity: 0.3; }
.project-card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 0.8rem 0; }

.tag {
    display: inline-block;
    padding: 3px 12px; font-size: 0.78rem;
    border-radius: 50px;
    background: rgba(74,125,255,0.12);
    color: var(--accent-blue);
    border: 1px solid rgba(74,125,255,0.25);
}

/* 优势卡片 */
.feature-card { text-align: center; padding: 2.5rem 1.5rem; }
.feature-card .card-icon { font-size: 3rem; }

/* 页面容器 */
.page-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 100px clamp(1rem, 3vw, 1.5rem) 60px;
    position: relative; z-index: 1;
}

/* 反馈网格 */
.feedback-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
}
.feedback-card video {
    width: 100%;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    background: #000;
    max-height: 240px;
}
.feedback-meta {
    display: flex; justify-content: space-between; align-items: center;
    font-size: 0.82rem; color: var(--text-secondary); margin-top: 0.5rem;
}

/* 模态框 */
.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.8);
    z-index: 9999;
    display: flex; align-items: center; justify-content: center;
    padding: 1.5rem;
    backdrop-filter: blur(6px);
}
.modal {
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius);
    width: 100%; max-width: 560px;
    max-height: 90vh; overflow-y: auto;
    padding: clamp(1.5rem, 4vw, 2rem);
    backdrop-filter: blur(20px);
    animation: modal-in 0.35s ease;
}
@keyframes modal-in {
    from { opacity: 0; transform: translateY(-30px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 1.5rem;
}
.modal-header h3 {
    font-size: 1.3rem;
    background: var(--gradient-1);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.modal-close {
    background: none; border: none;
    color: var(--text-secondary); font-size: 1.5rem; cursor: pointer;
    transition: var(--transition);
    width: 36px; height: 36px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
}
.modal-close:hover { color: #fff; background: rgba(255,255,255,0.1); }

/* 表单 */
.form-group { margin-bottom: 1.2rem; }
.form-group label { display: block; font-size: 0.9rem; font-weight: 500; margin-bottom: 0.4rem; color: var(--text-secondary); }
.form-control {
    width: 100%; padding: 10px 16px;
    font-size: 0.95rem;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}
.form-control:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 18px rgba(74,125,255,0.15);
    background: rgba(255,255,255,0.07);
}
.form-control::placeholder { color: rgba(136,144,184,0.45); }
textarea.form-control { min-height: 100px; resize: vertical; }
select.form-control {
    appearance: none; cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238890b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}
.form-control[type="file"] { padding: 8px; }
.form-control[type="file"]::file-selector-button {
    background: var(--accent-blue); color: #fff; border: none;
    padding: 6px 16px; border-radius: 4px; cursor: pointer;
    margin-right: 12px; font-family: inherit;
}

/* 提示 */
.alert { padding: 12px 18px; border-radius: var(--radius-sm); margin-bottom: 1.5rem; font-size: 0.92rem; }
.alert-success { background: rgba(46,213,115,0.12); border:1px solid rgba(46,213,115,0.25); color:#2ed573; }
.alert-error { background: rgba(255,71,87,0.12); border:1px solid rgba(255,71,87,0.25); color:#ff4757; }
.alert-info { background: rgba(74,125,255,0.12); border:1px solid rgba(74,125,255,0.25); color:#4a7dff; }
.alert-warning { background: rgba(255,165,2,0.12); border:1px solid rgba(255,165,2,0.25); color:#ffa502; }

/* 空状态 */
.empty-state { text-align: center; padding: 4rem 2rem; color: var(--text-secondary); }
.empty-state .empty-icon { font-size: 4rem; margin-bottom: 1rem; opacity: 0.35; }
.empty-state p { font-size: 1.1rem; }

/* 页脚 */
.site-footer {
    text-align: center; padding: 2rem;
    color: var(--text-secondary); font-size: 0.85rem;
    border-top: 1px solid rgba(255,255,255,0.04);
    position: relative; z-index: 1;
}

/* 项目详情 */
.project-detail .cover-image {
    width: 100%; max-height: 450px; object-fit: cover;
    border-radius: var(--radius); margin-bottom: 2rem;
    background: linear-gradient(135deg,#1a1a3a,#0d0d2b);
}
.project-detail h1 { font-size: clamp(1.8rem, 5vw, 2.5rem); margin-bottom: 1rem; }
.project-detail .tags { margin-bottom: 1.5rem; }
.project-detail .full-desc { color: var(--text-secondary); line-height: 1.9; margin-bottom: 2rem; }
.project-detail .full-desc img { max-width: 100%; border-radius: var(--radius-sm); }
.project-detail .video-embed { margin: 2rem 0; border-radius: var(--radius); overflow: hidden; background: #000; }
.project-detail .video-embed iframe { width: 100%; height: 400px; border: none; }

/* 后台 */
.admin-body { background: #060611; }
.admin-wrapper { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 240px;
    background: rgba(10,10,26,0.96);
    border-right: 1px solid var(--border-glow);
    padding: 1.5rem;
    position: fixed; top: 0; left: 0; bottom: 0;
    z-index: 100;
    overflow-y: auto;
}
.admin-sidebar .brand {
    font-size: 1.3rem; font-weight: 700;
    background: var(--gradient-1);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
    margin-bottom: 2rem; display: block; text-decoration: none;
}
.admin-sidebar nav a {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 14px;
    color: var(--text-secondary); text-decoration: none;
    border-radius: var(--radius-sm); margin-bottom: 4px;
    transition: var(--transition); font-size: 0.92rem;
}
.admin-sidebar nav a:hover,
.admin-sidebar nav a.active {
    background: rgba(74,125,255,0.1);
    color: var(--text-primary);
}
.admin-main { flex: 1; margin-left: 240px; padding: 2rem; min-height: 100vh; }
.admin-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }
.admin-header h1 { font-size: 1.6rem; }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.2rem;
    margin-bottom: 2rem;
}
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius);
    padding: 1.5rem; text-align: center;
    transition: var(--transition);
}
.stat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-glow-hover); }
.stat-card .stat-number {
    font-size: 2.5rem; font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.stat-card .stat-label { color: var(--text-secondary); font-size: 0.9rem; margin-top: 0.3rem; }

.admin-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
.admin-table th, .admin-table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid rgba(255,255,255,0.05); }
.admin-table th { color: var(--text-secondary); font-weight: 600; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 1px; background: rgba(255,255,255,0.02); }
.admin-table tr:hover td { background: rgba(74,125,255,0.03); }
.admin-table .actions { display: flex; gap: 8px; flex-wrap: wrap; }

.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 2rem; flex-wrap: wrap; }
.pagination a, .pagination span {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 36px; height: 36px; padding: 0 10px;
    border-radius: var(--radius-sm); font-size: 0.88rem;
    text-decoration: none; color: var(--text-secondary);
    border: 1px solid var(--border-glow);
    transition: var(--transition);
}
.pagination a:hover { background: rgba(74,125,255,0.12); color: #fff; }
.pagination .current { background: var(--gradient-1); color: #fff; border-color: transparent; }

.login-page {
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    padding: 2rem;
}
.login-card {
    width: 100%; max-width: 420px;
    background: var(--bg-card);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius);
    padding: 2.5rem;
    backdrop-filter: blur(20px);
}
.login-card h2 {
    text-align: center; margin-bottom: 2rem;
    font-size: 1.8rem;
    background: var(--gradient-1);
    -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.search-bar { display: flex; gap: 12px; margin-bottom: 1.5rem; flex-wrap: wrap; }
.search-bar .form-control { max-width: 320px; }
.video-preview-sm { max-width: 200px; max-height: 120px; border-radius: 4px; }

/* Toast */
.toast {
    position: fixed; top: 20px; right: 20px; z-index: 99999;
    padding: 12px 24px; border-radius: var(--radius-sm);
    font-size: 0.92rem;
    animation: toast-in 0.3s ease;
    min-width: 200px;
}
.toast-success { background: rgba(46,213,115,0.9); color: #fff; }
.toast-error { background: rgba(255,71,87,0.9); color: #fff; }
@keyframes toast-in {
    from { opacity: 0; transform: translateX(50px); }
    to { opacity: 1; transform: translateX(0); }
}

/* 流量统计条 */
.heatmap-bar { display: flex; align-items: center; gap: 10px; margin-bottom: 6px; }
.heatmap-bar .bar-label { width: 70px; font-size: 0.82rem; color: var(--text-secondary); text-align: right; flex-shrink: 0; }
.heatmap-bar .bar-track { flex: 1; height: 20px; background: rgba(255,255,255,0.03); border-radius: 10px; overflow: hidden; }
.heatmap-bar .bar-fill { height: 100%; border-radius: 10px; background: var(--gradient-1); transition: width 0.8s ease; min-width: 2px; }
.heatmap-bar .bar-count { width: 40px; font-size: 0.8rem; color: var(--accent-cyan); flex-shrink: 0; }

/* 响应式 */
@media (max-width: 1024px) {
    .admin-sidebar { width: 200px; }
    .admin-main { margin-left: 200px; }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed; top: 64px; left: 0; right: 0;
        background: rgba(8,8,20,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1.5rem; gap: 1rem;
        border-bottom: 1px solid var(--border-glow);
        transform: translateY(-130%);
        transition: transform 0.35s ease;
        z-index: 999;
    }
    .nav-links.open { transform: translateY(0); }
    .hamburger { display: flex; }

    .hero { min-height: 80vh; padding-top: 100px; }
    .hero h1 { font-size: 2rem; }

    .cards-grid,
    .feedback-grid { grid-template-columns: 1fr; }

    .project-card .card-image { height: 180px; }

    .admin-sidebar {
        width: 100%; height: auto; position: relative; padding: 1rem;
        border-right: none; border-bottom: 1px solid var(--border-glow);
    }
    .admin-sidebar .brand { margin-bottom: 0.8rem; }
    .admin-sidebar nav { display: flex; flex-wrap: wrap; gap: 4px; }
    .admin-sidebar nav a { font-size: 0.78rem; padding: 6px 10px; margin-bottom: 0; }
    .admin-wrapper { flex-direction: column; }
    .admin-main { margin-left: 0; padding: 1rem; }

    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 0.8rem; }
    .stat-card { padding: 1rem; }
    .stat-card .stat-number { font-size: 1.8rem; }

    .search-bar { flex-direction: column; }
    .search-bar .form-control { max-width: 100%; }

    .admin-table th, .admin-table td { padding: 8px 10px; font-size: 0.8rem; }
    .admin-header { flex-direction: column; gap: 0.5rem; align-items: flex-start; }
    .admin-header h1 { font-size: 1.3rem; }

    .project-detail .video-embed iframe { height: 220px; }
    .section-title h2 { font-size: 1.5rem; }
    .btn-purchase { padding: 12px 32px; font-size: 1rem; }

    .heatmap-bar .bar-label { width: 50px; font-size: 0.72rem; }
    .modal { max-width: 95vw; padding: 1.2rem; }

    .user-dropdown { right: auto; left: 0; }
}

@media (max-width: 480px) {
    .hero { padding: 90px 1rem 60px; }
    .hero h1 { font-size: 1.8rem; letter-spacing: 1px; }
    .hero-badge { font-size: 0.72rem; padding: 4px 14px; letter-spacing: 1px; }
    .hero p { font-size: 0.9rem; }

    .card-body { padding: 1rem; }
    .card-title { font-size: 1rem; }
    .card-text { font-size: 0.82rem; }
    .card-icon { font-size: 2rem; }

    .section-title { margin-bottom: 1.5rem; }
    .section-title h2 { font-size: 1.3rem; }

    .stats-grid { grid-template-columns: 1fr 1fr; }
    .stat-card .stat-number { font-size: 1.5rem; }

    .page-container { padding: 80px 0.8rem 40px; }

    .login-card { padding: 1.5rem; }
    .login-card h2 { font-size: 1.4rem; }

    .btn { padding: 10px 24px; font-size: 0.9rem; }
}