:root {
    --primary: #4e7cf5;
    --primary-light: #eef3ff;
    --primary-dark: #3d6be0;
    --bg: #f5f7fa;
    --card-bg: #ffffff;
    --text-1: #1a1f2e;
    --text-2: #5a6475;
    --text-3: #8a94a6;
    --text-4: #b5bdcc;
    --border: #e8ecf2;
    --border-light: #f0f3f8;
    --success: #34c759;
    --warning: #ff9500;
    --danger: #ff3b30;
    --purple: #8b5cf6;
    --pink: #ec4899;
    --cyan: #06b6d4;
    --orange: #f59e0b;
    --green: #10b981;
    --indigo: #6366f1;
    --red: #ef4444;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --shadow-1: 0 1px 3px rgba(0,0,0,0.04);
    --shadow-2: 0 4px 12px rgba(0,0,0,0.06);
    --shadow-3: 0 8px 24px rgba(0,0,0,0.08);
    --shadow-4: 0 16px 48px rgba(0,0,0,0.12);
    --sidebar-w: 220px;
    --topbar-h: 60px;
}

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

html { overflow-x: hidden; width: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text-1);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { text-decoration: none; color: inherit; }

/* ========== Top Navigation ========== */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--topbar-h);
    background: #fff;
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.top-nav-inner {
    height: 100%;
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 16px;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.brand-logo {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, #4e7cf5 0%, #6366f1 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: -0.5px;
    box-shadow: 0 4px 12px rgba(78,124,245,0.3);
    flex-shrink: 0;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }

.brand-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-1);
    white-space: nowrap;
}

/* Top Search */
.top-search {
    flex: 1;
    max-width: 520px;
    min-width: 200px;
    display: flex !important;
    align-items: center !important;
    background: var(--bg) !important;
    border: 1px solid transparent !important;
    border-radius: 24px !important;
    padding: 0 16px !important;
    height: 40px !important;
    transition: all 0.2s;
    box-sizing: border-box !important;
    overflow: hidden;
}

.top-search:focus-within {
    background: #fff !important;
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 3px rgba(78,124,245,0.1) !important;
}

.top-search i {
    color: var(--text-3) !important;
    font-size: 14px !important;
    margin-right: 8px !important;
    width: 16px !important;
    height: 16px !important;
    line-height: 1 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    flex-shrink: 0;
    flex: 0 0 auto;
}

.top-search input {
    flex: 1 !important;
    width: 100% !important;
    border: none !important;
    outline: none !important;
    background: transparent !important;
    font-size: 14px !important;
    font-family: inherit !important;
    color: var(--text-1) !important;
    padding: 0 !important;
    margin: 0 !important;
    height: 40px !important;
    line-height: 40px !important;
    box-sizing: border-box !important;
    box-shadow: none !important;
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
    appearance: none !important;
    display: block !important;
    text-rendering: auto !important;
    -webkit-font-smoothing: antialiased !important;
}

.top-search input::placeholder {
    color: var(--text-4);
    font-size: 14px;
    line-height: 40px;
    font-family: inherit;
}

/* Top Nav Actions */
.top-nav-actions {
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    flex-shrink: 0 !important;
}

/* Menu Toggle Button */
.menu-toggle {
    display: none;
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-2);
    cursor: pointer;
    font-size: 16px;
    transition: all 0.2s;
}

.menu-toggle:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-light);
}

/* Sidebar Overlay */
.sidebar-overlay {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.4);
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s, visibility 0.3s;
}

.sidebar-overlay.show {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.nav-action-btn {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 6px !important;
    background: transparent !important;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius-sm) !important;
    padding: 8px 14px !important;
    color: var(--text-2) !important;
    font-size: 13px !important;
    cursor: pointer !important;
    transition: all 0.2s;
    white-space: nowrap !important;
    line-height: 1.4 !important;
    margin: 0 !important;
    appearance: none !important;
    -webkit-appearance: none !important;
    font-weight: normal !important;
    font-family: inherit !important;
}

.nav-action-btn:hover {
    color: var(--primary) !important;
    border-color: var(--primary) !important;
    background: var(--primary-light) !important;
}

.nav-action-btn.nav-primary {
    background: var(--primary) !important;
    border-color: var(--primary) !important;
    color: #fff !important;
}

.nav-action-btn.nav-primary:hover {
    background: var(--primary-dark) !important;
    border-color: var(--primary-dark) !important;
    color: #fff !important;
}

/* ========== Layout ========== */
.layout {
    padding-top: var(--topbar-h);
    padding-left: var(--sidebar-w);
    min-height: calc(100vh - var(--topbar-h));
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
}

.main-content {
    padding: 24px 32px;
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    min-width: 0;
}

/* ========== Sidebar ========== */
.sidebar {
    position: fixed !important;
    left: 0 !important;
    right: auto !important;
    top: var(--topbar-h) !important;
    bottom: auto !important;
    width: var(--sidebar-w) !important;
    height: calc(100vh - var(--topbar-h)) !important;
    background: #fff;
    border-right: 1px solid var(--border);
    padding: 20px 14px;
    overflow-y: auto;
    overflow-x: hidden !important;
    box-sizing: border-box !important;
    z-index: 100 !important;
    display: flex !important;
    flex-direction: column;
    transition: transform 0.3s ease;
}

/* Mobile sidebar hidden by default */
@media (max-width: 1023px) {
    .sidebar {
        transform: translateX(-100%);
        display: flex !important;
    }
    .sidebar.show {
        transform: translateX(0);
        display: flex !important;
    }
    .layout {
        padding-left: 0;
    }
    .menu-toggle {
        display: flex !important;
    }
    .action-history,
    .action-favorites,
    .action-bookmark {
        display: none !important;
    }
    .category-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        padding: 20px;
    }
    .category-icon {
        width: 48px;
        height: 48px;
        font-size: 22px;
    }
    .category-info h1 {
        font-size: 20px;
    }
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-2);
    font-size: 14px;
    transition: all 0.15s;
    white-space: nowrap;
    position: relative;
    margin-bottom: 2px;
}

.nav-item:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.nav-item.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 500;
}

.nav-item i {
    width: 18px;
    text-align: center;
    font-size: 15px;
    flex-shrink: 0;
}

.nav-item span:not(.nav-badge) {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-item.nav-parent .nav-arrow {
    flex: 0 0 auto;
    font-size: 10px;
    color: var(--text-4);
    opacity: 0.6;
    margin-left: auto;
}

.nav-badge {
    flex: 0 0 auto !important;
    min-width: auto !important;
    overflow: visible !important;
    text-overflow: clip !important;
    white-space: nowrap !important;
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%);
    color: #fff;
    font-size: 9px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    line-height: 1;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 6px rgba(238, 90, 111, 0.3);
    animation: badgePulse 2s ease-in-out infinite;
    margin-left: 6px;
}

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

/* ========== Hero Section ========== */
.hero-section {
    display: flex !important;
    align-items: center !important;
    justify-content: space-between !important;
    gap: 40px !important;
    padding: 48px 40px !important;
    margin: 0 0 24px !important;
    background: linear-gradient(135deg, #e0e7ff 0%, #eef3ff 30%, #f0f4ff 60%, #f5f7fa 100%) !important;
    border-radius: var(--radius-xl) !important;
    position: relative !important;
    overflow: visible !important;
    box-shadow: 0 4px 24px rgba(78, 124, 245, 0.1) !important;
}

.hero-section::before {
    content: '' !important;
    position: absolute !important;
    top: -100px;
    right: -100px;
    width: 450px;
    height: 450px;
    background: radial-gradient(circle, rgba(139,92,246,0.2) 0%, rgba(139,92,246,0.05) 40%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    display: block !important;
}

.hero-section::after {
    content: '' !important;
    position: absolute !important;
    bottom: -80px;
    left: 100px;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(78,124,245,0.15) 0%, rgba(78,124,245,0.03) 40%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
    display: block !important;
}

.hero-section .hero-decor {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

.hero-section .hero-decor-1 {
    top: 20px;
    left: 30%;
    width: 80px;
    height: 80px;
    background: radial-gradient(circle, rgba(99,102,241,0.1) 0%, transparent 70%);
}

.hero-section .hero-decor-2 {
    bottom: 40px;
    right: 35%;
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, rgba(139,92,246,0.12) 0%, transparent 70%);
}

.hero-content {
    flex: 1 !important;
    max-width: 600px !important;
    margin: 0 !important;
    display: block !important;
    position: relative !important;
    z-index: 1 !important;
    min-width: 0;
}

.hero-title {
    font-size: 34px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 12px;
    line-height: 1.3;
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 14px;
    color: var(--text-2);
    margin-bottom: 24px;
    line-height: 1.7;
}

/* Hero Search */
.hero-search {
    display: flex !important;
    align-items: center !important;
    background: #fff !important;
    border: 2px solid var(--border) !important;
    border-radius: var(--radius-lg) !important;
    padding: 0 6px 0 20px !important;
    height: 54px !important;
    box-shadow: var(--shadow-1) !important;
    transition: all 0.2s;
    gap: 0 !important;
    max-width: none !important;
    margin-bottom: 0 !important;
}

.hero-search:focus-within {
    border-color: var(--primary) !important;
    box-shadow: 0 0 0 4px rgba(78,124,245,0.1) !important;
}

.hero-search > i {
    color: var(--text-3) !important;
    font-size: 18px !important;
    margin-right: 12px !important;
}

.hero-search input {
    flex: 1 !important;
    border: none !important;
    outline: none !important;
    font-size: 15px !important;
    color: var(--text-1) !important;
    min-width: 0 !important;
    height: 50px !important;
    line-height: 50px !important;
    padding: 0 !important;
    margin: 0 !important;
    box-shadow: none !important;
    background: transparent !important;
    border-radius: 0 !important;
    box-sizing: border-box !important;
}

.hero-search input::placeholder {
    color: var(--text-4);
    line-height: 50px !important;
}

.hero-search button {
    width: 54px !important;
    height: 42px !important;
    background: linear-gradient(135deg, #4e7cf5, #6366f1) !important;
    background-image: linear-gradient(135deg, #4e7cf5, #6366f1) !important;
    border: none !important;
    border-radius: var(--radius-md) !important;
    color: #fff !important;
    font-size: 16px !important;
    cursor: pointer !important;
    transition: all 0.2s;
    flex-shrink: 0 !important;
    padding: 0 !important;
    line-height: 1 !important;
    font-weight: normal !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    appearance: none !important;
    -webkit-appearance: none !important;
    font-family: inherit !important;
}

.hero-search button:hover {
    background: linear-gradient(135deg, #3d6be0, #4f46e5) !important;
    transform: scale(1.05);
}

/* Hero Tags */
.hero-tags {
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    margin-top: 16px !important;
    flex-wrap: wrap !important;
}

.hero-tags .tag-label {
    font-size: 13px;
    color: var(--text-3);
}

.hero-tags a {
    display: inline-block !important;
    font-size: 13px !important;
    color: var(--primary) !important;
    padding: 4px 12px !important;
    background: var(--primary-light) !important;
    border-radius: 12px !important;
    transition: all 0.15s;
    text-decoration: none !important;
}

.hero-tags a:hover {
    background: #dde7ff !important;
    color: var(--primary) !important;
    transform: none !important;
}

/* Hero Visual - Browser Mockup */
.hero-visual {
    flex: 0 0 380px;
    height: 340px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Float Tags */
.hero-float-tag {
    position: absolute;
    background: #fff;
    border-radius: 20px;
    padding: 8px 14px;
    font-size: 13px;
    color: var(--text-2);
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    display: flex;
    align-items: center;
    gap: 6px;
    z-index: 10;
    animation: tagFloat 3s ease-in-out infinite;
    white-space: nowrap;
}

.hero-float-tag .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary);
    animation: pulse 2s ease-in-out infinite;
}

.hero-float-tag.tag-top {
    top: 10px;
    left: -20px;
    animation-delay: 0s;
}

.hero-float-tag.tag-bottom {
    bottom: 20px;
    right: -10px;
    animation-delay: 1.5s;
}

/* Browser Window */
.hero-browser {
    width: 100%;
    max-width: 380px;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.12), 0 4px 12px rgba(0,0,0,0.06);
    overflow: hidden;
    position: relative;
    animation: browserFloat 5s ease-in-out infinite;
}

.browser-bar {
    background: #f7f8fa;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-light);
}

.browser-dots {
    display: flex;
    gap: 6px;
}

.browser-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.browser-dots .dot-red { background: #ff5f57; }
.browser-dots .dot-yellow { background: #febc2e; }
.browser-dots .dot-green { background: #28c840; }

.browser-url {
    flex: 1;
    background: #fff;
    border-radius: 6px;
    padding: 5px 12px;
    font-size: 12px;
    color: var(--text-3);
    display: flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--border-light);
}

.browser-url i {
    color: var(--success);
    font-size: 11px;
}

.browser-content {
    padding: 16px;
}

.browser-toolbar {
    display: flex;
    gap: 8px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.tool-chip {
    font-size: 11px;
    padding: 5px 10px;
    border-radius: 14px;
    background: var(--bg);
    color: var(--text-3);
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: default;
}

.tool-chip.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 500;
}

.browser-area {
    position: relative;
    min-height: 180px;
}

/* Main Tool Card */
.browser-tool-card {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.3s;
}

.browser-tool-card.card-main {
    padding: 14px;
    border-color: var(--primary-light);
    background: linear-gradient(135deg, #fff 0%, #f8faff 100%);
}

.btc-header {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
}

.btc-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 15px;
    flex-shrink: 0;
}

.btc-icon.blue { background: linear-gradient(135deg, #4e7cf5, #3d6be0); }
.btc-icon.orange { background: linear-gradient(135deg, #f59e0b, #d97706); }
.btc-icon.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.btc-icon.green { background: linear-gradient(135deg, #10b981, #059669); }

.btc-title h5 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-1);
    margin: 0;
}

.btc-title span {
    font-size: 11px;
    color: var(--text-3);
}

.btc-body {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px dashed var(--border-light);
}

.btc-line {
    height: 6px;
    background: linear-gradient(90deg, var(--primary-light) 0%, #e8ecf2 100%);
    border-radius: 3px;
    margin-bottom: 6px;
}

.btc-line.short {
    width: 60%;
    background: linear-gradient(90deg, #e8ecf2 0%, #f0f3f8 100%);
}

/* Sub Cards */
.browser-tool-card.card-sub-1 {
    position: absolute;
    top: -8px;
    right: -20px;
    background: #fff;
    padding: 8px 12px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: subCardFloat1 4s ease-in-out infinite;
    box-shadow: 0 4px 16px rgba(245,158,11,0.15);
    border-color: #fef3c7;
}

.browser-tool-card.card-sub-2 {
    position: absolute;
    bottom: -4px;
    right: 10px;
    background: #fff;
    padding: 8px 12px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: subCardFloat2 4.5s ease-in-out infinite;
    box-shadow: 0 4px 16px rgba(139,92,246,0.15);
    border-color: #ede9fe;
}

.browser-tool-card.card-sub-3 {
    position: absolute;
    bottom: 12px;
    left: -12px;
    background: #fff;
    padding: 8px 12px;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: subCardFloat3 5s ease-in-out infinite;
    box-shadow: 0 4px 16px rgba(16,185,129,0.15);
    border-color: #d1fae5;
}

.browser-tool-card.card-sub-1 span,
.browser-tool-card.card-sub-2 span,
.browser-tool-card.card-sub-3 span {
    color: var(--text-2);
    font-weight: 500;
}

/* Animations */
@keyframes browserFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

@keyframes tagFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

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

@keyframes subCardFloat1 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-4px, -6px); }
}

@keyframes subCardFloat2 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-6px, -4px); }
}

@keyframes subCardFloat3 {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(4px, -5px); }
}

/* ========== Sections ========== */
/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 0;
    font-size: 14px;
    color: var(--text-3);
}

.breadcrumb a {
    color: var(--text-3);
    text-decoration: none;
    transition: color 0.15s;
}

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

.breadcrumb-sep {
    color: var(--text-4);
}

.breadcrumb-current {
    color: var(--text-1);
    font-weight: 500;
}

/* Category Header */
.category-header {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 28px 32px;
    background: linear-gradient(135deg, #eef3ff 0%, #f5f7fa 100%);
    border-radius: var(--radius-xl);
    margin-bottom: 28px;
}

.category-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #4e7cf5, #6366f1);
    border-radius: var(--radius-lg);
    font-size: 28px;
    color: #fff;
    flex-shrink: 0;
}

.category-info h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-1);
    margin: 0 0 6px;
}

.category-info p {
    font-size: 14px;
    color: var(--text-2);
    margin: 0;
    line-height: 1.6;
}

.section { margin-bottom: 32px; }

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.section-title {
    font-size: 18px !important;
    font-weight: 700 !important;
    color: var(--text-1) !important;
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    margin: 0 !important;
    padding: 0 !important;
    border: none !important;
    line-height: 1.4 !important;
}

.section-title i {
    color: var(--primary);
    font-size: 18px;
}

.section-more {
    font-size: 13px;
    color: var(--text-3);
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.15s;
}

.section-more:hover { color: var(--primary); }

/* ========== Tools Grid ========== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.tool-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 20px;
    display: flex;
    align-items: flex-start;
    gap: 14px;
    transition: all 0.2s;
    border: 1px solid var(--border-light);
    position: relative;
}

.tool-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-2);
    border-color: #dde7ff;
}

.tool-card.has-new {
    padding-top: 30px;
}

.tool-card .new-tag {
    position: absolute;
    top: 10px;
    right: 12px;
    background: linear-gradient(135deg, #ff3b30, #dc2626);
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    line-height: 1;
}

.tool-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 20px;
    flex-shrink: 0;
}

.tool-icon.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.tool-icon.pink { background: linear-gradient(135deg, #ec4899, #db2777); }
.tool-icon.red { background: linear-gradient(135deg, #ef4444, #dc2626); }
.tool-icon.green { background: linear-gradient(135deg, #10b981, #059669); }
.tool-icon.blue { background: linear-gradient(135deg, #4e7cf5, #3d6be0); }
.tool-icon.orange { background: linear-gradient(135deg, #f59e0b, #d97706); }
.tool-icon.cyan { background: linear-gradient(135deg, #06b6d4, #0891b2); }
.tool-icon.indigo { background: linear-gradient(135deg, #6366f1, #4f46e5); }

.tool-info h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 4px;
}

.tool-info p {
    font-size: 12px;
    color: var(--text-3);
    line-height: 1.4;
}

/* ========== Favorite / History page cards ========== */
.fav-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}

.fav-card {
    position: relative;
    background: #fff;
    border-radius: 16px;
    padding: 28px 20px 24px;
    text-align: center;
    border: 1px solid rgba(229, 231, 235, 0.8);
    transition: all 0.25s ease;
    text-decoration: none;
    display: block;
}

.fav-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 28px rgba(31, 41, 55, 0.08);
    border-color: #dbe3ff;
}

.fav-card-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: #fff;
}

.fav-card-icon.purple { background: linear-gradient(135deg, #a78bfa, #8b5cf6); }
.fav-card-icon.green  { background: linear-gradient(135deg, #6ee7b7, #34d399); }
.fav-card-icon.red    { background: linear-gradient(135deg, #fca5a5, #f87171); }
.fav-card-icon.blue   { background: linear-gradient(135deg, #93c5fd, #60a5fa); }
.fav-card-icon.orange { background: linear-gradient(135deg, #fcd34d, #fbbf24); }
.fav-card-icon.pink   { background: linear-gradient(135deg, #f9a8d4, #f472b6); }
.fav-card-icon.cyan   { background: linear-gradient(135deg, #67e8f9, #22d3ee); }
.fav-card-icon.indigo { background: linear-gradient(135deg, #a5b4fc, #818cf8); }

.fav-card-title {
    font-size: 15px;
    font-weight: 600;
    color: #111827;
    margin-bottom: 8px;
    line-height: 1.3;
}

.fav-card-desc {
    font-size: 12.5px;
    color: #6b7280;
    line-height: 1.5;
}

.fav-card-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(17, 24, 39, 0.55);
    border: none;
    color: #fff;
    font-size: 11px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.2s;
    z-index: 2;
}

.fav-card:hover .fav-card-close { opacity: 1; }
.fav-card-close:hover { background: #ef4444; }

.history-page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.history-page-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 700;
    color: #111827;
}

.history-page-title .icon {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #a78bfa, #8b5cf6);
    color: #fff;
    font-size: 13px;
}

.history-page-title.history-title .icon {
    background: linear-gradient(135deg, #93c5fd, #60a5fa);
}

.history-page-sub {
    font-size: 13.5px;
    color: #6b7280;
    margin-top: 6px;
    padding-left: 38px;
}

.history-clear-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    font-size: 13px;
    font-weight: 500;
    color: #6b7280;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
}

.history-clear-btn:hover {
    color: #ef4444;
    border-color: #ef4444;
    background: #fef2f2;
}

.empty-state {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    text-align: center;
    background: #fff;
    border-radius: 20px;
    border: 1px dashed #e5e7eb;
    margin-bottom: 24px;
}

.empty-state-icon {
    width: 88px;
    height: 88px;
    border-radius: 50%;
    background: linear-gradient(135deg, #f3f4f6, #e5e7eb);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: #9ca3af;
    margin-bottom: 18px;
}

.empty-state-title {
    font-size: 18px;
    font-weight: 600;
    color: #111827;
    margin-bottom: 6px;
}

.empty-state-desc {
    font-size: 14px;
    color: #6b7280;
    margin-bottom: 22px;
}

.empty-state-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 28px;
    background: linear-gradient(135deg, #4e7cf5, #6366f1);
    color: #fff;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
}

.empty-state-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(78, 124, 245, 0.3);
}

@media (max-width: 1199px) {
    .fav-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 900px) {
    .fav-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
    .fav-grid { grid-template-columns: repeat(2, 1fr); }
    .fav-card { padding: 20px 14px 18px; }
    .fav-card-icon { width: 52px; height: 52px; font-size: 22px; border-radius: 12px; }
    .history-page-title { font-size: 18px; }
    .history-page-sub { padding-left: 0; }
}

/* ========== Footer ========== */
.footer {
    background: #2d3342 !important;
    background-image: none !important;
    border-top: none !important;
    padding: 48px 0 24px !important;
    margin-top: 40px !important;
    margin-left: 0 !important;
    color: #c8ccd4 !important;
    max-width: none !important;
}

.footer-container {
    max-width: 1400px !important;
    margin: 0 auto !important;
    padding: 0 32px !important;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.4fr 3fr;
    gap: 48px;
    margin-bottom: 32px;
    align-items: start;
}

.footer-brand {
    justify-self: start;
    text-align: left;
}

.footer-brand-link {
    margin-bottom: 14px;
}

.footer-brand-link .brand-logo {
    width: 32px;
    height: 32px;
    font-size: 13px;
}

.footer-brand-link .brand-title {
    color: #fff;
}

.footer-desc {
    font-size: 13px;
    color: #9ca3af;
    line-height: 1.7;
    margin-bottom: 20px;
}

.footer-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.footer-features span {
    font-size: 12px;
    color: #9ca3af;
    display: flex;
    align-items: center;
    gap: 4px;
}

.footer-features span i {
    color: var(--success);
}

.footer-columns {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}

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

.footer-column li { margin-bottom: 10px; }

.footer-column a {
    font-size: 13px !important;
    color: #9ca3af !important;
    transition: color 0.15s;
    display: block !important;
    padding: 0 !important;
    margin: 0 !important;
    background: transparent !important;
    border: none !important;
    border-radius: 0 !important;
}

.footer-column a:hover { color: #fff !important; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1) !important;
    padding-top: 20px !important;
    text-align: center !important;
}

.footer-bottom p {
    font-size: 13px;
    color: #6b7280;
}

/* ========== Responsive ========== */

/* Large Desktop (1920px+) */
@media (min-width: 1920px) {
    .main-content { padding: 28px 48px; }
    .footer-container { padding: 0 48px; }
    .hero-section { padding: 56px 48px !important; }
}

/* ========== Tool Detail Page ========== */
/* Tool Header */
.tool-header {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: #fff;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    margin-bottom: 20px;
}

.tool-header-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
    border-radius: var(--radius-lg);
    font-size: 28px;
    color: #fff;
    flex-shrink: 0;
}

.tool-header-info {
    flex: 1;
}

.tool-header-info h1 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-1);
    margin: 0 0 6px;
}

.tool-header-info p {
    font-size: 14px;
    color: var(--text-2);
    margin: 0;
    line-height: 1.5;
}

.tool-header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    margin-left: auto;
}

.tool-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    background: #fff;
    color: var(--text-2);
    border: 1px solid var(--border);
    text-decoration: none;
    white-space: nowrap;
}

.tool-action-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.tool-action-btn .fa {
    font-size: 14px;
}

.tool-action-btn.favorited {
    background: linear-gradient(135deg, #4e7cf5, #6366f1);
    color: #fff;
    border-color: transparent;
}

.tool-action-btn.favorited:hover {
    box-shadow: 0 4px 12px rgba(78, 124, 245, 0.3);
    transform: translateY(-1px);
}

.tool-action-btn.favorited .fa-star-o,
.tool-action-btn.favorited .fa-star {
    display: none;
}

.tool-action-btn.favorited .fa-star {
    display: inline-block;
}

.tool-action-btn:not(.favorited) .fa-star {
    display: none;
}

.tool-action-btn:not(.favorited) .fa-star-o {
    display: inline-block;
}

.tool-action-btn.share-btn:hover {
    border-color: #10b981;
    color: #10b981;
    background: #ecfdf5;
}

/* Tool Tabs */
.tool-tabs {
    display: flex;
    gap: 4px;
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 6px;
    margin-bottom: 20px;
    border: 1px solid var(--border-light);
}

.tool-tab {
    flex: 1;
    padding: 10px 12px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-2);
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.tool-tab:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.tool-tab.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

/* Tool Workspace */
.tool-workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.workspace-panel {
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-light);
    background: #fafbfc;
}

.panel-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-1);
}

.panel-actions {
    display: flex;
    gap: 8px;
}

.panel-action {
    font-size: 12px;
    color: var(--text-3);
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.15s;
}

.panel-action:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.workspace-textarea {
    width: 100%;
    flex: 1;
    min-height: 300px;
    padding: 16px;
    border: none;
    outline: none;
    resize: vertical;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-1);
    background: #fff;
}

.workspace-textarea::placeholder {
    color: var(--text-4);
}

/* Tool Actions */
.tool-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    margin-bottom: 28px;
    gap: 16px;
    flex-wrap: wrap;
}

.action-controls {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.control-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-2);
}

.control-item select {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-1);
    background: #fff;
    outline: none;
    cursor: pointer;
}

.control-item select:focus {
    border-color: var(--primary);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background: linear-gradient(135deg, #4e7cf5, #6366f1);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(78, 124, 245, 0.3);
}

.btn-primary i {
    font-size: 14px;
}

/* Tool Sections */
.tool-section {
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    padding: 24px;
    margin-bottom: 20px;
}

.tool-section-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-1);
    margin: 0 0 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tool-section-title i {
    color: var(--primary);
}

.tool-desc {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.7;
    margin: 0 0 20px;
}

/* Tool Intro Content (from old pages) */
.tool-intro-content h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-1);
    margin: 24px 0 12px;
}

.tool-intro-content h2:first-child {
    margin-top: 0;
}

.tool-intro-content h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-1);
    margin: 16px 0 8px;
}

.tool-intro-content p {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.7;
    margin: 0 0 12px;
}

.tool-intro-content strong {
    color: var(--text-1);
    font-weight: 600;
}

.tool-intro-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 12px 0 16px;
}

.tool-intro-content table td {
    padding: 8px 10px;
    border: 1px solid var(--border-light);
    font-size: 14px;
    color: var(--text-1);
    text-align: center;
}

.tool-intro-content ul, .tool-intro-content ol {
    font-size: 14px;
    color: var(--text-2);
    line-height: 1.7;
    padding-left: 20px;
    margin: 0 0 12px;
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--bg);
    border-radius: var(--radius-md);
    transition: all 0.2s;
}

.feature-item:hover {
    background: var(--primary-light);
}

.feature-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: 18px;
    color: #fff;
    flex-shrink: 0;
}

.feature-icon.blue { background: linear-gradient(135deg, #4e7cf5, #3d6be0); }
.feature-icon.orange { background: linear-gradient(135deg, #f59e0b, #d97706); }
.feature-icon.green { background: linear-gradient(135deg, #10b981, #059669); }
.feature-icon.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }

.feature-info h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-1);
    margin: 0 0 4px;
}

.feature-info p {
    font-size: 12px;
    color: var(--text-3);
    margin: 0;
    line-height: 1.5;
}

/* Tips List */
.tips-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 12px 24px;
}

.tips-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: var(--text-2);
    line-height: 1.6;
}

.tip-dot {
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 8px;
}

/* Related Tools Grid */
.related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.related-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    background: var(--bg);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: inherit;
    transition: all 0.2s;
    border: 1px solid transparent;
}

.related-card:hover {
    background: #fff;
    border-color: var(--border);
    transform: translateY(-2px);
    box-shadow: var(--shadow-2);
}

.related-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-size: 16px;
    color: #fff;
    flex-shrink: 0;
}

.related-icon.red { background: linear-gradient(135deg, #ef4444, #dc2626); }
.related-icon.green { background: linear-gradient(135deg, #10b981, #059669); }
.related-icon.orange { background: linear-gradient(135deg, #f59e0b, #d97706); }
.related-icon.indigo { background: linear-gradient(135deg, #6366f1, #4f46e5); }
.related-icon.blue { background: linear-gradient(135deg, #4e7cf5, #3d6be0); }
.related-icon.cyan { background: linear-gradient(135deg, #06b6d4, #0891b2); }
.related-icon.purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.related-icon.pink { background: linear-gradient(135deg, #ec4899, #db2777); }

.related-info h4 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-1);
    margin: 0 0 2px;
}

.related-info p {
    font-size: 12px;
    color: var(--text-3);
    margin: 0;
    line-height: 1.4;
}

/* ========== txt-diff Vue Workspace Styles ========== */
.tool-box {
    padding: 0;
}

.tool-box .tool-card {
    background: #fff;
    border: none;
    border-radius: 0;
    padding: 0;
    margin: 0 0 16px;
    box-shadow: none;
    transition: none;
    display: block;
    width: 100%;
}

.tool-box .tool-card:hover {
    transform: none;
    box-shadow: none;
}

.tool-box .grid-x {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 0;
}

.tool-box .cell {
    padding: 0;
    width: 100%;
}

.tool-box .field-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 8px;
    padding: 12px 16px 0;
    background: #fafbfc;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    border: 1px solid var(--border-light);
    border-bottom: none;
}

.tool-box textarea {
    width: 100%;
    min-height: 280px;
    padding: 12px 16px 16px;
    border: 1px solid var(--border-light);
    border-top: none;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    outline: none;
    resize: vertical;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 13px;
    line-height: 1.6;
    color: var(--text-1);
    background: #fff;
    box-sizing: border-box;
}

.tool-box textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(78, 124, 245, 0.1);
}

.tool-box textarea::placeholder {
    color: var(--text-4);
}

.tool-box .button-group {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.tool-box .btn-convert {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 28px;
    background: linear-gradient(135deg, #4e7cf5, #6366f1);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.tool-box .btn-convert:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(78, 124, 245, 0.3);
}

.tool-box .btn-demo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 28px;
    background: #fff;
    color: var(--text-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.tool-box .btn-demo:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.tool-box .result-box {
    margin-top: 20px;
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.tool-box .result-title {
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-1);
    background: #fafbfc;
    border-bottom: 1px solid var(--border-light);
}

.tool-box .result-box #diffoutput,
.tool-box #diffoutput {
    padding: 0;
    overflow-x: auto;
}

.tool-box .diff-table {
    width: 100% !important;
    border: none !important;
    border-collapse: collapse;
}

.tool-box .diff-table th {
    background: #f5f7fa !important;
    font-size: 13px !important;
    font-weight: 600 !important;
    color: var(--text-1) !important;
    padding: 10px 12px !important;
    border: 1px solid var(--border-light) !important;
    text-align: left !important;
}

.tool-box .diff-table td {
    font-size: 13px !important;
    padding: 6px 12px !important;
    border: 1px solid var(--border-light) !important;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
}

/* Diff table color overrides */
.tool-box table.diff {
    border-collapse: collapse;
    border: 1px solid var(--border-light);
    width: 100%;
}

.tool-box table.diff thead {
    border-bottom: 1px solid var(--border-light);
    background: #f5f7fa;
}

.tool-box table.diff thead th.texttitle {
    text-align: left;
    font-size: 13px;
    font-weight: 600;
    padding: 10px 12px;
    color: var(--text-1);
}

.tool-box table.diff tbody td {
    padding: 4px 10px;
    font-size: 13px;
    vertical-align: top;
}

.tool-box table.diff tbody th {
    font-size: 12px;
    padding: 4px 8px;
    min-width: 40px;
}

.tool-box .text-center {
    text-align: center;
}

/* Responsive for txt-diff workspace */
@media (max-width: 767px) {
    .tool-box .grid-x {
        grid-template-columns: 1fr;
    }
    .tool-box .button-group {
        flex-direction: column;
    }
    .tool-box .btn-convert,
    .tool-box .btn-demo {
        justify-content: center;
        width: 100%;
    }
}

/* Tool Detail Responsive */
@media (max-width: 1023px) {
    .tool-workspace {
        grid-template-columns: 1fr;
    }
    .tool-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        padding: 20px;
    }
    .tool-header-icon {
        width: 48px;
        height: 48px;
        font-size: 22px;
    }
    .tool-header-info h1 {
        font-size: 20px;
    }
    .tool-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .action-controls {
        justify-content: center;
    }
    .btn-primary {
        justify-content: center;
    }
    .tool-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
    }
    .tool-tab {
        flex: 0 0 auto;
    }
    .related-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 767px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .tips-list {
        grid-template-columns: 1fr;
    }
    .tool-header {
        flex-wrap: wrap;
        gap: 14px;
        padding: 16px;
    }
    .tool-header-icon {
        width: 48px;
        height: 48px;
        font-size: 22px;
    }
    .tool-header-info h1 {
        font-size: 18px;
    }
    .tool-header-info p {
        font-size: 13px;
    }
    .tool-header-actions {
        width: 100%;
        margin-left: 0;
        justify-content: flex-end;
    }
    .tool-action-btn {
        padding: 7px 14px;
        font-size: 12px;
    }
}

/* Desktop / Laptop (1200px - 1919px) */
@media (min-width: 1200px) and (max-width: 1919px) {
    :root {
        --sidebar-w: 200px;
    }
    .main-content { padding: 24px 32px; }
}

/* Small Laptop / iPad Landscape (1024px - 1199px) */
@media (min-width: 1024px) and (max-width: 1199px) {
    :root {
        --sidebar-w: 180px;
    }
    .tools-grid { grid-template-columns: repeat(4, 1fr); }
    .main-content { padding: 20px 24px; }
    .hero-section { padding: 36px 24px !important; overflow: visible !important; }
    .hero-visual { flex: 0 0 300px; height: 300px; }
    .hero-browser { max-width: 300px; }
    .hero-float-tag.tag-top { left: -10px; }
    .hero-float-tag.tag-bottom { right: 0; }
}

/* iPad Portrait / Small Tablet (768px - 1023px) */
@media (min-width: 768px) and (max-width: 1023px) {
    :root {
        --sidebar-w: 200px;
    }
    .tools-grid { grid-template-columns: repeat(3, 1fr); }
    .top-search { max-width: 320px; }
    .main-content { padding: 20px 20px; }
    .brand-title { font-size: 15px; }
    .hero-title { font-size: 28px; }
    .hero-section { padding: 28px 20px !important; overflow: visible !important; gap: 24px !important; }
    .hero-visual { flex: 0 0 240px; height: 280px; }
    .hero-browser { max-width: 240px; }
    .hero-float-tag { font-size: 11px; padding: 6px 10px; }
    .hero-float-tag.tag-top { left: -10px; top: 0; }
    .hero-float-tag.tag-bottom { right: -10px; bottom: 10px; }
    .btc-icon { width: 28px; height: 28px; font-size: 12px; }
    .btc-title h5 { font-size: 12px; }
    .btc-title span { font-size: 10px; }
    .browser-tool-card.card-sub-1,
    .browser-tool-card.card-sub-2,
    .browser-tool-card.card-sub-3 { padding: 6px 10px; font-size: 10px; gap: 6px; }
    .browser-tool-card.card-sub-1 { right: -10px; }
    .browser-tool-card.card-sub-2 { right: 5px; }
    .browser-tool-card.card-sub-3 { left: -5px; }
    .footer-main { grid-template-columns: 1fr; gap: 32px; }
    .footer-columns { grid-template-columns: repeat(3, 1fr); }
}

/* Tablet / Large Phone (480px - 767px) */
@media (min-width: 480px) and (max-width: 767px) {
    :root {
        --sidebar-w: 200px;
    }
    .top-search { display: none; }
    .nav-action-btn span { display: none; }
    .nav-action-btn { padding: 8px; }
    .hero-title { font-size: 26px; }
    .tools-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-columns { grid-template-columns: repeat(2, 1fr); }
    .main-content { padding: 16px 12px; }
    .top-nav-inner { padding: 0 12px; gap: 8px; }
    .brand { margin-left: 0; }
    .brand-title { display: none; }
    .hero-section { flex-direction: column; gap: 24px; padding: 24px 20px !important; overflow: visible !important; }
    .hero-visual { display: none; }
}

/* Phone (max-width: 479px) */
@media (max-width: 479px) {
    :root {
        --sidebar-w: 220px;
    }
    .top-nav-inner { padding: 0 12px; gap: 8px; }
    .top-search { display: none; }
    .nav-action-btn span { display: none; }
    .nav-action-btn { padding: 8px; }
    .brand { margin-left: 0; }
    .brand-title { display: none; }
    .hero-title { font-size: 22px; line-height: 1.3; }
    .hero-subtitle { font-size: 14px; }
    .tools-grid { grid-template-columns: 1fr; }
    .footer-columns { grid-template-columns: 1fr; }
    .main-content { padding: 16px 12px; }
    .hero-section { flex-direction: column; text-align: center; gap: 20px; padding: 24px 16px !important; border-radius: var(--radius-lg) !important; overflow: visible !important; }
    .hero-visual { display: none; }
    .hero-tags { justify-content: center; }
    .hero-search {
        height: 48px !important;
    }

    .hero-search input {
        height: 44px !important;
        line-height: 44px !important;
    }

    .hero-search input::placeholder {
        line-height: 44px !important;
    }
    .hero-search button { width: 60px !important; height: 48px !important; }
    .footer-main { grid-template-columns: 1fr; gap: 32px; }
    .footer { padding: 32px 0 20px !important; }
    .hero-section::before { width: 200px; height: 200px; top: -40px; right: -40px; }
    .hero-section::after { width: 150px; height: 150px; bottom: -30px; left: 50px; }
}

/* ===== Info Pages (help/faq/report/contact/about) ===== */
.info-page{max-width:1100px;margin:0;}
.info-section{margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid #eef1f6;}
.info-section:last-child{border-bottom:none;}
.info-section h2{font-size:20px;font-weight:600;color:var(--text-1);margin:0 0 12px;display:flex;align-items:center;gap:8px;}
.info-section h2 i{color:var(--primary);}
.info-section p{font-size:14px;color:var(--text-2);line-height:1.8;margin:0 0 8px;}
.info-list{list-style:none;padding:0;margin:8px 0 0;}
.info-list li{font-size:14px;color:var(--text-2);line-height:1.8;padding:6px 0 6px 20px;position:relative;}
.info-list li::before{content:'';position:absolute;left:4px;top:14px;width:6px;height:6px;border-radius:50%;background:var(--primary);}
.info-list li strong{color:var(--text-1);}
.info-link{color:var(--primary);text-decoration:none;}
.info-link:hover{text-decoration:underline;}
.info-tip{padding:16px 20px;background:var(--primary-light);border-radius:10px;font-size:14px;color:var(--text-2);line-height:1.8;}
.info-tip a{color:var(--primary);font-weight:600;}
.faq-item{padding:16px 0;border-bottom:1px solid #f0f3f7;}
.faq-item:last-child{border-bottom:none;}
.faq-item h3{font-size:15px;font-weight:600;color:var(--text-1);margin:0 0 8px;}
.faq-item p{font-size:14px;color:var(--text-2);line-height:1.8;margin:0;}

.tu-check{
    display:inline-flex;
    align-items:center;
    gap:8px;
    height:20px;
    margin:0;
    padding:0;
    font-size:14px;
    line-height:20px;
    color:#5a6475;
    cursor:pointer;
    white-space:nowrap;
}

.tu-check input[type="checkbox"]{
    appearance:none;
    -webkit-appearance:none;
    display:block;
    position:relative;
    width:16px;
    height:16px;
    min-width:16px;
    max-width:16px;
    min-height:16px;
    max-height:16px;
    margin:0;
    padding:0;
    flex:0 0 16px;
    box-sizing:border-box;
    border:1px solid #9aa3b2;
    border-radius:3px;
    background:#fff;
}

.tu-check input[type="checkbox"]:checked{
    background:#4e7cf5;
    border-color:#4e7cf5;
}

.tu-check input[type="checkbox"]:checked::after{
    content:'';
    position:absolute;
    left:4px;
    top:1px;
    width:5px;
    height:9px;
    border:solid #fff;
    border-width:0 2px 2px 0;
    transform:rotate(45deg);
}

/* 工具工作区默认铺满 */
#appBox{
    width:100%;
}

/* 指定元素居中 */
[data-layout="center"]{
    width:max-content;
    max-width:100%;
    margin-left:auto;
    margin-right:auto;
}