/* ============================================================
   在线工具箱 · 设计系统 v3
   品牌色:翡翠绿 #16a34a | 中性色:Slate | 风格:清爽现代
   ============================================================ */
:root {
    --brand: #16a34a;
    --brand-dark: #15803d;
    --brand-soft: #ecfdf5;
    --ink: #0f172a;
    --ink-2: #334155;
    --ink-3: #64748b;
    --line: #e5eaf0;
    --bg: #f4f6f9;
    --card: #ffffff;
    --radius: 14px;
    --radius-sm: 9px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .05), 0 1px 6px rgba(15, 23, 42, .04);
    --shadow-lg: 0 12px 32px rgba(2, 6, 23, .10);
    --ring: 0 0 0 3px rgba(22, 163, 74, .16);
}

* { outline: none; }

html { -webkit-text-size-adjust: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    font-size: 14px;
    color: var(--ink-2);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); transition: color .15s; }
a:hover, a:focus { color: var(--brand-dark); text-decoration: none; }

::selection { background: rgba(22, 163, 74, .18); }

/* 细滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }
::-webkit-scrollbar-track { background: transparent; }

/* ============ 顶部导航(白底玻璃) ============ */
.navbar-default {
    background: rgba(255, 255, 255, .92);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border: none;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    margin-bottom: 0;
    box-shadow: 0 1px 3px rgba(15, 23, 42, .04);
    min-height: 58px;
    /* backdrop-filter 会创建独立层叠上下文,
       必须显式抬高,否则下拉菜单会被后面的页面内容盖住 */
    position: relative;
    z-index: 1030;
}

.navbar-default .navbar-brand {
    color: var(--ink);
    height: 58px;
    padding: 15px 6px 15px 0;
    font-size: 17px;
    font-weight: 700;
    display: flex;
    align-items: center;
}

.navbar-default .navbar-brand:hover { color: var(--brand); }

.logo_ico {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    margin-right: 9px;
    border-radius: 9px;
    color: #fff !important;
    font-size: 15px;
    background: linear-gradient(135deg, #16a34a, #0d9488);
    box-shadow: 0 3px 8px rgba(22, 163, 74, .35);
}

.brand-text { letter-spacing: .5px; }

.navbar-default .navbar-nav > li > a {
    color: var(--ink-2);
    height: 58px;
    padding-top: 19px;
    font-weight: 500;
    transition: color .15s;
}
.navbar-default .navbar-nav > li > a:hover,
.navbar-default .navbar-nav > li > a:focus {
    color: var(--brand);
    background: transparent;
}
.navbar-default .navbar-nav > .open > a,
.navbar-default .navbar-nav > .open > a:hover,
.navbar-default .navbar-nav > .open > a:focus {
    color: var(--brand);
    background: var(--brand-soft);
}

.navbar-default .navbar-toggle { border-color: var(--line); margin-top: 12px; }
.navbar-default .navbar-toggle .icon-bar { background: var(--ink-2); }
.navbar-default .navbar-toggle:hover { background: #f1f5f9; }
.navbar-default .navbar-collapse, .navbar-default .navbar-form { border-color: var(--line); }

/* 搜索框 */
.navbar-form { margin-top: 12px; margin-bottom: 0; }
.navbar-form .form-control {
    width: 230px;
    border-radius: 20px;
    border-color: var(--line);
    background: #f6f8fa;
    box-shadow: none;
    padding-left: 16px;
    transition: all .2s;
}
.navbar-form .form-control:focus {
    background: #fff;
    border-color: var(--brand);
    box-shadow: var(--ring);
}
#search-btn { border-radius: 20px; padding: 7px 18px; }

/* 下拉菜单 */
.dropdown-menu {
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 6px;
    margin-top: 2px !important;
}
.dropdown-menu.ul-list { max-height: 440px; overflow-y: auto; min-width: 208px; }
.dropdown-menu.ul-list > li > a { padding: 8px 14px; border-radius: 8px; font-size: 13px; color: var(--ink-2); }
.dropdown-menu.ul-list > li > a:hover { background: #f1f5f9; color: var(--ink); }
.dropdown-menu.ul-list .dropdown-header {
    color: var(--brand);
    font-weight: 700;
    font-size: 11px;
    letter-spacing: 1px;
    padding: 9px 14px 3px;
    text-transform: uppercase;
}
.dropdown-menu .divider { background: var(--line); }
.caret { transition: transform .2s; }
.open > .dropdown-toggle .caret { transform: rotate(180deg); }

/* ============ 主体卡片 ============ */
main { padding: 24px 0 0; }

.tool-card, .card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 26px 30px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}

.card-title, .tool-title {
    margin: 0 0 20px;
    font-size: 21px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: .3px;
}

.tool-card > h2.card-title, .card > h2.card-title {
    position: relative;
    padding-bottom: 14px;
    border-bottom: 1px solid #eef2f6;
}
.tool-card > h2.card-title:after, .card > h2.card-title:after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 42px;
    height: 3px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--brand), #0d9488);
}

/* ============ 工具说明区 ============ */
.tool-desc {
    background: var(--card);
    border: 1px solid var(--line);
    border-left: 4px solid var(--brand);
    border-radius: var(--radius-sm);
    padding: 16px 22px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
    font-size: 13px;
    color: var(--ink-3);
    line-height: 2;
}
.tool-desc h4 { margin: 0 0 6px; color: var(--ink); font-size: 14px; font-weight: 700; }
.tool-desc p { margin: 0; }

/* ============ 表单控件 ============ */
.form-control {
    border-radius: var(--radius-sm);
    border-color: #d8dfe8;
    color: var(--ink);
    box-shadow: none;
    transition: border-color .15s, box-shadow .15s;
    font-size: 13px;
    height: 36px;
    padding: 6px 12px;
}
.form-control:focus {
    border-color: var(--brand);
    box-shadow: var(--ring);
}
.form-control::placeholder { color: #a8b3c2; }
textarea.form-control {
    min-height: 110px;
    font-family: ui-monospace, Menlo, Consolas, "Courier New", monospace;
    font-size: 13px;
    line-height: 1.7;
    resize: vertical;
}
select.form-control { appearance: auto; }
.input-group-addon { border-radius: var(--radius-sm) 0 0 var(--radius-sm); border-color: #d8dfe8; background: #f8fafc; }
.input-group .form-control { border-radius: var(--radius-sm); }
.input-group-btn .btn { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.control-label { color: var(--ink-2); }

label { font-weight: 500; }

/* ============ 按钮 ============ */
.btn {
    border-radius: var(--radius-sm);
    font-weight: 600;
    padding: 7px 16px;
    font-size: 13px;
    border: 1px solid transparent;
    transition: all .15s;
    letter-spacing: .3px;
}
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 5px 12px; font-size: 12px; }

.btn-success, .btn-primary {
    background: var(--brand);
    border-color: var(--brand);
    color: #fff;
}
.btn-success:hover, .btn-success:focus, .btn-success:active,
.btn-primary:hover, .btn-primary:focus, .btn-primary:active {
    background: var(--brand-dark);
    border-color: var(--brand-dark);
    color: #fff;
}

.btn-default {
    background: #fff;
    border-color: #d8dfe8;
    color: var(--ink-2);
}
.btn-default:hover, .btn-default:focus, .btn-default:active {
    background: #f8fafc;
    border-color: #b9c4d1;
    color: var(--ink);
}

.btn-warning { background: #f59e0b; border-color: #f59e0b; color: #fff; }
.btn-warning:hover, .btn-warning:focus { background: #d97706; border-color: #d97706; color: #fff; }

.btn-danger { background: #dc2626; border-color: #dc2626; }
.btn-danger:hover, .btn-danger:focus { background: #b91c1c; border-color: #b91c1c; }

.btn-info { background: #0ea5e9; border-color: #0ea5e9; }
.btn-info:hover, .btn-info:focus { background: #0284c7; border-color: #0284c7; }

.btn-toolbar-gap { margin: 16px 0; }
.btn-toolbar-gap .btn { margin: 0 5px 6px; }

/* ============ 标签页(下划线式) ============ */
.nav-tabs {
    border-bottom: 1px solid var(--line);
    margin-bottom: 0;
}
.nav-tabs > li > a {
    border: none !important;
    border-radius: 0 !important;
    margin-right: 4px;
    padding: 10px 18px;
    color: var(--ink-3);
    font-weight: 600;
    font-size: 14px;
    background: transparent;
    transition: color .15s;
}
.nav-tabs > li > a:hover { color: var(--ink); background: transparent; border: none !important; }
.nav-tabs > li.active > a,
.nav-tabs > li.active > a:hover,
.nav-tabs > li.active > a:focus {
    color: var(--brand);
    background: transparent;
    border: none !important;
    border-bottom: 2.5px solid var(--brand) !important;
}

/* ============ 表格 ============ */
.table { margin-bottom: 0; }
.table-striped > tbody > tr:nth-of-type(odd) { background: #f8fafc; }
.table-striped > tbody > tr > td, .table > tbody > tr > td { padding-top: 9px; padding-bottom: 9px; vertical-align: middle; }
.table > thead > tr > th {
    color: var(--ink-3);
    font-weight: 600;
    font-size: 12px;
    border-bottom: 1px solid var(--line);
}
.table-striped > tbody > tr > td strong, .table > tbody > tr > td strong { color: var(--ink-2); }

/* ============ 结果展示 ============ */
.result-panel {
    background: #f8fafc;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    padding: 14px 18px;
    font-family: ui-monospace, Menlo, Consolas, monospace;
    font-size: 13px;
    color: var(--ink);
    word-break: break-all;
    white-space: pre-wrap;
    max-height: 460px;
    overflow: auto;
    margin-top: 14px;
}

.stat-bar { margin: 10px 0 0; color: var(--ink-3); font-size: 12px; }
.stat-bar b { color: var(--brand); }

/* ============ 足迹 ============ */
#foot-history {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 13px 22px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
    font-size: 13px;
}
.his-label { color: #94a3b8; }
#visit_history a.his-item {
    display: inline-block;
    background: #f1f5f9;
    border-radius: 14px;
    padding: 2px 11px;
    margin: 2px 6px 2px 0;
    color: var(--ink-3);
    font-size: 12px;
    transition: all .15s;
}
#visit_history a.his-item:hover { background: var(--brand-soft); color: var(--brand); }

/* ============ 底部导航 ============ */
.footer-nav {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px 28px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}
.footer-nav h2 {
    font-size: 17px;
    font-weight: 700;
    margin: 0 0 16px;
    color: var(--ink);
    padding-bottom: 12px;
    border-bottom: 1px solid #eef2f6;
}
.footer-nav h3 { font-size: 13px; margin: 14px 0 10px; color: var(--ink-3); font-weight: 700; }
.footer-nav h3 span {
    border-left: 3px solid var(--brand);
    padding-left: 9px;
    color: var(--ink-2);
}
.list-inline-bg { padding-left: 0; list-style: none; margin-bottom: 6px; }
.list-inline-bg li {
    display: inline-block;
    background: #f1f5f9;
    border-radius: 8px;
    margin: 0 7px 7px 0;
    font-size: 13px;
    transition: all .15s;
}
.list-inline-bg li a { display: block; padding: 5px 13px; color: var(--ink-2); border-radius: 8px; }
.list-inline-bg li a:hover { background: var(--brand); color: #fff; }

/* ============ 页脚 ============ */
.copyright {
    background: var(--ink);
    color: #8ea0b5;
    padding: 24px 0;
    margin-top: 12px;
    font-size: 13px;
    text-align: center;
}
.copyright a { color: #b9c7d6; }
.copyright a:hover { color: #fff; }

/* 友情链接(后台维护,无链接时整块不输出) */
.friend-links {
    max-width: 1000px;
    margin: 0 auto 14px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, .08);
    line-height: 2;
}
.friend-links .fl-title { color: #8ea0b5; margin-right: 10px; }
.friend-links a {
    display: inline-block;
    margin: 0 6px 4px 0;
    padding: 2px 10px;
    color: #b9c7d6;
    border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 999px;
    font-size: 12px;
    transition: all .15s;
}
.friend-links a:hover {
    color: #fff;
    border-color: var(--brand);
    background: var(--brand);
}

/* ============ 返回顶部 ============ */
.gotop {
    position: fixed;
    right: 22px;
    bottom: 68px;
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--brand), #0d9488);
    border-radius: 12px;
    display: none;
    z-index: 99;
    box-shadow: 0 6px 16px rgba(22, 163, 74, .35);
    transition: transform .15s;
}
.gotop:hover { transform: translateY(-2px); background: linear-gradient(135deg, #15803d, #0f766e); }
.gotop .arrow {
    position: absolute;
    left: 50%;
    top: 15px;
    width: 11px;
    height: 11px;
    border-left: 2px solid #fff;
    border-top: 2px solid #fff;
    transform: translateX(-50%) rotate(45deg);
}
.gotop .arrow.lit { top: 21px; opacity: .55; }

/* ============ 通用小元素 ============ */
.chip {
    display: inline-block; padding: 4px 13px; border-radius: 16px;
    background: #f1f5f9; color: var(--ink-2); font-size: 13px; cursor: pointer;
    border: 1px solid transparent; user-select: none; transition: all .15s;
}
.chip:hover { background: #e8edf3; }
.chip.active { background: var(--brand-soft); color: var(--brand); border-color: var(--brand); }

.dc-result {
    background: #f8fafc;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    padding: 13px 16px;
    font-size: 14px;
    line-height: 2;
    color: var(--ink-2);
}
.dc-result b { color: var(--brand); }

.color-dot { border-radius: 50%; box-shadow: 0 0 0 1px #d8dfe8; cursor: pointer; }

/* ============ 响应式 ============ */
@media (max-width: 767px) {
    .navbar-form .form-control { width: 140px; }
    .tool-card, .card, .footer-nav { padding: 16px; border-radius: 12px; }
    .card-title, .tool-title { font-size: 17px; }
    main { padding: 14px 0 0; }
    #foot-history { padding: 10px 14px; }
}