/* ===== 基础重置 & 变量 ===== */
:root {
    --bg-primary: #0a0a1a;
    --bg-secondary: #12122a;
    --bg-card: #1a1a3e;
    --bg-card-hover: #222255;
    --border-color: #2a2a5a;
    --text-primary: #e8e8ff;
    --text-secondary: #a0a0cc;
    --text-muted: #6a6a99;
    --accent-blue: #4f7cff;
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --accent-red: #ef4444;
    --gradient-1: linear-gradient(135deg, #4f7cff, #8b5cf6);
    --gradient-2: linear-gradient(135deg, #ec4899, #8b5cf6);
    --gradient-3: linear-gradient(135deg, #10b981, #4f7cff);
    --shadow-card: 0 4px 24px rgba(0,0,0,0.3);
    --shadow-glow: 0 0 30px rgba(79,124,255,0.15);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-blue) var(--bg-primary);
}

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

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent-blue); border-radius: 4px; }

a { color: var(--accent-blue); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-purple); }

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 粒子背景 ===== */
#particles {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: rgba(10, 10, 26, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 10, 26, 0.95);
    box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}

.nav-content {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 20px;
    color: var(--text-primary);
    text-decoration: none;
}

.logo-icon {
    font-size: 28px;
    filter: drop-shadow(0 0 8px rgba(79,124,255,0.5));
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    position: relative;
    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: var(--transition);
}

.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }

.nav-stats {
    display: flex;
    gap: 20px;
}

.stat-item {
    font-size: 13px;
    color: var(--text-muted);
}

.stat-num {
    color: var(--accent-blue);
    font-weight: 700;
    font-size: 15px;
}

/* ===== Hero区域 ===== */
.hero {
    position: relative;
    z-index: 1;
    padding: 140px 24px 80px;
    text-align: center;
}

.hero-content {
    max-width: 720px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 6px 20px;
    background: rgba(79,124,255,0.12);
    border: 1px solid rgba(79,124,255,0.3);
    border-radius: 20px;
    font-size: 14px;
    color: var(--accent-blue);
    margin-bottom: 24px;
    animation: pulse-badge 2s ease-in-out infinite;
}

@keyframes pulse-badge {
    0%, 100% { box-shadow: 0 0 0 0 rgba(79,124,255,0.2); }
    50% { box-shadow: 0 0 0 8px rgba(79,124,255,0); }
}

.hero-title {
    font-size: clamp(36px, 6vw, 56px);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

/* 搜索框 */
.search-box {
    position: relative;
    max-width: 560px;
    margin: 0 auto 28px;
}

.search-box input {
    width: 100%;
    padding: 16px 56px 16px 52px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    font-size: 16px;
    color: var(--text-primary);
    outline: none;
    transition: var(--transition);
    font-family: inherit;
}

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

.search-box input:focus {
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-glow);
    background: rgba(18, 18, 42, 0.9);
}

.search-icon {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
}

.search-shortcut {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    padding: 4px 10px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 12px;
    color: var(--text-muted);
    font-family: inherit;
}

.hero-tags {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.tag-popular {
    font-size: 13px;
    color: var(--text-muted);
}

.tag-btn {
    padding: 6px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.tag-btn:hover {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
    transform: translateY(-1px);
}

/* ===== 分类网格 ===== */
.categories {
    position: relative;
    z-index: 1;
    padding: 60px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-title {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 16px;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}

.category-card {
    padding: 24px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--card-accent, var(--gradient-1));
    opacity: 0;
    transition: var(--transition);
}

.category-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-glow);
}

.category-card:hover::before { opacity: 1; }

.category-card.active {
    border-color: var(--accent-blue);
    background: var(--bg-card-hover);
}

.category-card.active::before { opacity: 1; }

.category-icon {
    font-size: 36px;
    margin-bottom: 12px;
    display: block;
}

.category-name {
    font-weight: 600;
    font-size: 15px;
    margin-bottom: 4px;
}

.category-count {
    font-size: 13px;
    color: var(--text-muted);
}

/* ===== 工具列表 ===== */
.tools {
    position: relative;
    z-index: 1;
    padding: 40px 0 80px;
}

.filter-bar {
    display: flex;
    gap: 8px;
    margin-top: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.filter-btn:hover {
    border-color: var(--accent-blue);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--gradient-1);
    border-color: transparent;
    color: white;
    font-weight: 600;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

/* 工具卡片 */
.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.tool-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-glow);
}

.tool-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(79,124,255,0.03), transparent 60%);
    opacity: 0;
    transition: var(--transition);
}

.tool-card:hover::after { opacity: 1; }

.tool-header {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    margin-bottom: 16px;
}

.tool-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    flex-shrink: 0;
    background: var(--tool-color-bg, rgba(79,124,255,0.15));
}

.tool-info {
    flex: 1;
    min-width: 0;
}

.tool-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 2px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tool-name .verified {
    font-size: 14px;
}

.tool-vendor {
    font-size: 13px;
    color: var(--text-muted);
}

.tool-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.tool-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.tool-tag {
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
}

.tool-tag.category-tag {
    background: rgba(79,124,255,0.12);
    color: var(--accent-blue);
}

.tool-tag.price-tag {
    background: rgba(16,185,129,0.12);
    color: var(--accent-green);
}

.tool-tag.price-tag.paid {
    background: rgba(245,158,11,0.12);
    color: var(--accent-orange);
}

.tool-tag.price-tag.opensource {
    background: rgba(139,92,246,0.12);
    color: var(--accent-purple);
}

.tool-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.tool-rating {
    display: flex;
    align-items: center;
    gap: 6px;
}

.stars {
    color: var(--accent-orange);
    font-size: 14px;
    letter-spacing: 1px;
}

.rating-num {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 600;
}

.tool-visit {
    padding: 8px 18px;
    background: var(--gradient-1);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.tool-visit:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 16px rgba(79,124,255,0.4);
    color: white;
}

/* 对比按钮 */
.tool-compare-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-muted);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.tool-compare-btn:hover,
.tool-compare-btn.active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: white;
}

/* 无结果 */
.no-results {
    text-align: center;
    padding: 80px 20px;
}

.no-results-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.no-results h3 {
    font-size: 20px;
    margin-bottom: 8px;
}

.no-results p {
    color: var(--text-muted);
}

/* ===== 对比栏 ===== */
.compare-bar {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 99;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    box-shadow: 0 -4px 30px rgba(0,0,0,0.5);
    transition: bottom 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(20px);
}

.compare-bar.visible {
    bottom: 24px;
}

.compare-items {
    display: flex;
    gap: 8px;
}

.compare-item {
    padding: 6px 12px;
    background: rgba(79,124,255,0.15);
    border-radius: 8px;
    font-size: 13px;
    color: var(--accent-blue);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.compare-item .remove {
    cursor: pointer;
    opacity: 0.6;
    transition: var(--transition);
}

.compare-item .remove:hover { opacity: 1; }

.compare-btn {
    padding: 10px 24px;
    background: var(--gradient-2);
    border: none;
    border-radius: 10px;
    color: white;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.compare-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 16px rgba(236,72,153,0.4);
}

.compare-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ===== 提交区域 ===== */
.submit-section {
    position: relative;
    z-index: 1;
    padding: 80px 0;
}

.submit-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 60px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    position: relative;
    overflow: hidden;
}

.submit-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient-2);
}

.submit-content h2 {
    font-size: 28px;
    margin-bottom: 12px;
}

.submit-content p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.submit-btn {
    display: inline-block;
    padding: 12px 32px;
    background: var(--gradient-2);
    border-radius: 10px;
    color: white;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(236,72,153,0.3);
    color: white;
}

.submit-decoration {
    position: relative;
    width: 200px;
    height: 120px;
    flex-shrink: 0;
}

.floating-icon {
    position: absolute;
    font-size: 32px;
    animation: float 3s ease-in-out infinite;
    animation-delay: var(--delay);
}

.floating-icon:nth-child(1) { top: 0; left: 20px; }
.floating-icon:nth-child(2) { top: 10px; left: 70px; }
.floating-icon:nth-child(3) { top: 0; right: 20px; }
.floating-icon:nth-child(4) { bottom: 10px; left: 50px; }
.floating-icon:nth-child(5) { bottom: 0; right: 30px; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* ===== 页脚 ===== */
.footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 260px;
}

.footer-brand .logo-icon {
    font-size: 24px;
}

.footer-brand .logo-text {
    font-size: 18px;
    font-weight: 800;
}

.footer-brand p {
    color: var(--text-muted);
    margin-top: 12px;
    font-size: 14px;
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.footer-col a {
    display: block;
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 10px;
}

.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
    text-align: center;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 13px;
}

/* ===== 模态框 ===== */
.modal-overlay {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(8px);
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    width: 100%;
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    animation: modal-in 0.3s ease;
}

@keyframes modal-in {
    from { opacity: 0; transform: scale(0.95) translateY(20px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    transition: var(--transition);
    z-index: 1;
}

.modal-close:hover {
    background: var(--accent-red);
    border-color: var(--accent-red);
    color: white;
}

.modal-content {
    padding: 40px;
}

.modal-tool-header {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
}

.modal-tool-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    flex-shrink: 0;
}

.modal-tool-name {
    font-size: 28px;
    font-weight: 800;
}

.modal-tool-vendor {
    font-size: 14px;
    color: var(--text-muted);
}

.modal-section {
    margin-top: 28px;
}

.modal-section h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.modal-section p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
}

.modal-features {
    list-style: none;
    margin-top: 8px;
}

.modal-features li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-features li::before {
    content: '✦';
    color: var(--accent-blue);
    font-size: 12px;
}

.modal-rating {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 8px;
}

.modal-rating .stars {
    font-size: 20px;
}

.modal-rating .rating-text {
    font-size: 14px;
    color: var(--text-secondary);
}

.modal-actions {
    display: flex;
    gap: 12px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

.modal-visit-btn {
    flex: 1;
    padding: 14px;
    background: var(--gradient-1);
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
    text-align: center;
    text-decoration: none;
}

.modal-visit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(79,124,255,0.4);
    color: white;
}

.modal-compare-action-btn {
    padding: 14px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.modal-compare-action-btn:hover {
    border-color: var(--accent-purple);
    color: var(--text-primary);
}

/* ===== 对比模态框 ===== */
.compare-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

.compare-table th,
.compare-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

.compare-table th {
    color: var(--text-muted);
    font-weight: 500;
    width: 100px;
    white-space: nowrap;
}

.compare-table td {
    color: var(--text-secondary);
}

.compare-highlight {
    color: var(--accent-green) !important;
    font-weight: 600;
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .nav-stats { display: none; }
    
    .hero-title { font-size: 32px; }
    .hero-subtitle { font-size: 15px; }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .submit-card {
        flex-direction: column;
        text-align: center;
        padding: 40px 24px;
    }
    
    .submit-decoration { display: none; }
    
    .footer-content {
        flex-direction: column;
    }
    
    .footer-links {
        gap: 30px;
        flex-wrap: wrap;
    }
    
    .modal-content { padding: 24px; }
    .modal-tool-name { font-size: 22px; }
}

@media (max-width: 480px) {
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .search-shortcut { display: none; }
}

/* ===== 加载动画 ===== */
.tool-card {
    animation: fade-up 0.5s ease forwards;
    opacity: 0;
}

@keyframes fade-up {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.tool-card:nth-child(1) { animation-delay: 0.05s; }
.tool-card:nth-child(2) { animation-delay: 0.1s; }
.tool-card:nth-child(3) { animation-delay: 0.15s; }
.tool-card:nth-child(4) { animation-delay: 0.2s; }
.tool-card:nth-child(5) { animation-delay: 0.25s; }
.tool-card:nth-child(6) { animation-delay: 0.3s; }
.tool-card:nth-child(7) { animation-delay: 0.35s; }
.tool-card:nth-child(8) { animation-delay: 0.4s; }
.tool-card:nth-child(9) { animation-delay: 0.45s; }
.tool-card:nth-child(10) { animation-delay: 0.5s; }