/* ========================================
   IP 查询网 · 精雕细琢版 site.css
   配色：#1172D2 (主) + #0F172A (文字) + #EAFAFE (背景)
   字体：Inter / 系统 sans
   圆角：8-12px
   ======================================== */

:root {
    --primary: #1172D2;
    --primary-hover: #0A63BB;
    --primary-soft: #E8F2FC;
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-tertiary: #94A3B8;
    --bg-primary: #FFFFFF;
    --bg-soft: #F8FAFC;
    --bg-tint: #EAFAFE;
    --border-color: #E2E8F0;
    --border-strong: #CBD5E1;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --info: #06B6D4;
    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
    --shadow: 0 1px 3px 0 rgba(15, 23, 42, 0.06), 0 1px 2px -1px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.06), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.06), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
    --navbar-bg: #FFFFFF;
    --navbar-text: #0F172A;
    --navbar-border: #E2E8F0;
}

[data-theme="dark"] {
    --bg-primary: #0F172A;
    --bg-soft: #1E293B;
    --bg-tint: #1E3A5F;
    --text-primary: #F1F5F9;
    --text-secondary: #CBD5E1;
    --text-tertiary: #94A3B8;
    --border-color: #334155;
    --border-strong: #475569;
    --primary-soft: #1E3A5F;
    --navbar-bg: #1E293B;
    --navbar-text: #F1F5F9;
    --navbar-border: #334155;
}

* {
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-soft);
    color: var(--text-primary);
    min-height: 100vh;
    font-size: 15px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body, body * {
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

/* ========================================
   Navbar
   ======================================== */
.navbar {
    background: var(--navbar-bg) !important;
    border-bottom: 1px solid var(--navbar-border);
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
    margin-bottom: 0 !important;
}

.navbar .nav-link,
.navbar .navbar-brand {
    color: var(--navbar-text) !important;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
}

.navbar .navbar-brand {
    font-weight: 700;
    font-size: 1.1rem;
}

.navbar .nav-link:hover {
    background: var(--bg-soft);
    color: var(--primary) !important;
}

.navbar .dropdown-menu {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    padding: 0.5rem;
    min-width: 180px;
}

.navbar .dropdown-item {
    border-radius: 6px;
    padding: 0.4rem 0.75rem;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.navbar .dropdown-item:hover {
    background: var(--primary-soft);
    color: var(--primary);
}

/* ========================================
   块 1：公网 IP 显示条 (sticky bar)
   ======================================== */
.ip-display-bar {
    background: var(--bg-tint);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-primary);
    padding: 0.4rem 0;
}

.ip-bar-icon {
    color: var(--primary);
    font-size: 1.1rem;
}

.ip-bar-label {
    color: var(--text-secondary);
    margin-right: 0.25rem;
}

.ip-bar-value {
    color: var(--text-primary);
    font-family: 'SF Mono', 'Monaco', 'Courier New', monospace;
    font-size: 1.05rem;
    font-weight: 700;
    margin-right: 0.5rem;
    letter-spacing: 0.02em;
}

.ip-geo-chip {
    display: inline-block;
    padding: 0.2rem 0.55rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-left: 0.25rem;
    white-space: nowrap;
}

.ip-geo-isp {
    background: var(--primary-soft);
    border-color: var(--primary-soft);
    color: var(--primary);
    font-weight: 500;
}

/* ========================================
   块 2：Hero + Mega Search
   ======================================== */
.hero-section {
    padding: 0.75rem 0 1.5rem;
    background:
        radial-gradient(ellipse 120% 80% at 50% 50%, rgba(17, 114, 210, 0.10) 0%, transparent 80%),
        linear-gradient(180deg, var(--bg-tint) 0%, var(--bg-soft) 100%);
}

.hero-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 0;
    margin-bottom: 0.35rem;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0;
}

.mega-search-form {
    max-width: 720px;
    margin: 0 auto;
}

.mega-search-bar {
    display: flex;
    align-items: center;
    background: var(--bg-primary);
    border: 1px solid var(--border-strong);
    border-radius: 12px;
    padding: 0.4rem 0.4rem 0.4rem 1.1rem;
    box-shadow: var(--shadow);
    transition: all 0.2s;
}

.mega-search-bar:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(17, 114, 210, 0.12);
}

.mega-search-icon {
    color: var(--text-tertiary);
    font-size: 1.2rem;
    margin-right: 0.6rem;
}

.mega-search-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 1.05rem;
    color: var(--text-primary);
    padding: 0.5rem 0;
    outline: none;
}

.mega-search-input::placeholder {
    color: var(--text-tertiary);
}

.mega-search-btn {
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.6rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
}

.mega-search-btn:hover {
    background: var(--primary-hover);
}

.mega-search-tags {
    margin-top: 0.6rem;
    text-align: center;
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.mega-tag-label {
    margin-right: 0.5rem;
    color: var(--text-tertiary);
}

.mega-search-hint {
    display: inline-block;
    margin-left: 0.5rem;
    padding: 0.15rem 0.6rem;
    background: var(--primary-soft);
    color: var(--primary);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
    opacity: 0;
    transition: opacity 0.2s;
}

.mega-search-hint-active {
    opacity: 1;
}

.mega-tag {
    display: inline-block;
    margin: 0 0.15rem;
    padding: 0.2rem 0.7rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8rem;
    transition: all 0.15s;
}

.mega-tag:hover {
    background: var(--primary-soft);
    border-color: var(--primary);
    color: var(--primary);
}

/* ========================================
   块 3：热门工具卡 (ip2location 模板)
   ======================================== */
.hot-tools-section,
.all-tools-section {
    padding: 1.5rem 0;
}

.section-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.section-title {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.01em;
}

.section-title i {
    margin-right: 0.4rem;
    font-size: 1.2rem;
}

.section-link {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
}

.section-link:hover {
    text-decoration: underline;
}

.tool-card {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    padding: 1.1rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s;
    height: 100%;
}

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

.tool-card-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--c1, #1172D2) 0%, var(--c2, #0A63BB) 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.25rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
}

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

.tool-card-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 0.15rem;
}

.tool-card-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.4;
}

.tool-card-badge {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--danger);
    color: white;
    font-size: 0.6rem;
    font-weight: 700;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    letter-spacing: 0.05em;
}

.tool-card-badge-new {
    background: var(--success);
}

/* ========================================
   块 4：全部工具 (5 列 grid 紧凑列表)
   ======================================== */
.all-tools-section {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
}

.all-tools-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.all-tools-group {
    background: var(--bg-soft);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.75rem 1rem;
}

.all-tools-group-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 0.65rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
    letter-spacing: 0.01em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.all-tools-group-title i {
    color: var(--primary);
    margin-right: 0.35rem;
}

.all-tools-group-title .count {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background: white;
    padding: 1px 8px;
    border-radius: 10px;
    font-weight: 500;
    margin-left: auto;
}

.all-tools-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.all-tools-list li {
    margin: 0;
}

.all-tools-list a {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 4px 10px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.825rem;
    border-radius: 5px;
    transition: all 0.15s;
}

.all-tools-list a:hover {
    background: var(--primary-soft);
    color: var(--primary);
}

.all-tools-list a i {
    font-size: 0.85rem;
    opacity: 0.7;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--bg-primary);
    color: var(--text-tertiary);
    padding: 1.5rem 0;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.85rem;
}

/* ========================================
   通用表单元素 (工具页面用)
   ======================================== */
.form-input-block {
    width: 100% !important;
    max-width: 600px !important;
}

.form-select.form-input-block {
    width: 100% !important;
    max-width: 600px !important;
}

.card {
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: var(--primary) !important;
    border-color: var(--primary) !important;
    color: white !important;
    font-weight: 500;
    border-radius: 8px;
}

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

/* ========================================
   响应式
   ======================================== */
@media (max-width: 992px) {
    .all-tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    body {
        font-size: 14px;
    }
    .hero-section {
        padding: 2.5rem 0 2rem;
    }
    .hero-title {
        font-size: 1.75rem;
    }
    .hero-subtitle {
        font-size: 0.9rem;
    }
    .mega-search-bar {
        padding: 0.3rem 0.3rem 0.3rem 0.9rem;
    }
    .mega-search-input {
        font-size: 0.95rem;
    }
    .mega-search-btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }
    .ip-display-bar {
        font-size: 0.8rem;
    }
    .ip-bar-value {
        font-size: 0.95rem;
    }
    .ip-geo-chip {
        font-size: 0.7rem;
        padding: 0.15rem 0.4rem;
    }
    .hot-tools-section,
    .all-tools-section {
        padding: 2rem 0;
    }
    .section-title {
        font-size: 1.15rem;
    }
    .tool-card {
        padding: 0.85rem;
        gap: 0.6rem;
    }
    .tool-card-icon {
        width: 36px;
        height: 36px;
        font-size: 1.05rem;
    }
    .tool-card-title {
        font-size: 0.875rem;
    }
    .tool-card-desc {
        font-size: 0.75rem;
    }
    .all-tools-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    .all-tools-group {
        padding: 0.85rem;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 1.5rem;
    }
    .all-tools-list a {
        font-size: 0.8rem;
        padding: 0.35rem 0.4rem;
    }
}

/* ====== a11y: visually-hidden label（屏幕阅读器可见，视觉隐藏） ====== */
.visually-hidden {
    position: absolute !important;
    width: 1px !important;
    height: 1px !important;
    padding: 0 !important;
    margin: -1px !important;
    overflow: hidden !important;
    clip: rect(0, 0, 0, 0) !important;
    white-space: nowrap !important;
    border: 0 !important;
}


/* ========== 了解更多 横向扁平卡片（2026-06-07 v13） ========== */
.learn-card {
    display: flex;
    align-items: center;
    gap: 0.9rem;
    padding: 1rem 1.1rem;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    text-decoration: none;
    color: inherit;
    height: 100%;
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}
.learn-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
    border-color: #d1d5db;
}
.learn-card-icon {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    font-size: 1.25rem;
}
.learn-card-body {
    flex-grow: 1;
    min-width: 0;
    line-height: 1.3;
}
.learn-card-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: #1a202c;
    margin: 0 0 0.2rem 0;
}
.learn-card-desc {
    font-size: 0.8125rem;
    color: #6b7280;
    margin: 0;
}