/* =========================================================
   小球 · 网络安全社团  |  CTF 工具分享页（独立界面）
   与主界面共用一套设计变量，方便后续并入首页
   ========================================================= */
:root{
  --blue-900:#16336B;
  --blue-800:#1E4488;
  --blue-700:#2557C9;
  --blue-600:#2E63D8;
  --blue-500:#3D7BF0;
  --blue-400:#5B90F5;
  --blue-300:#8FB4F2;
  --blue-200:#BFD8FF;
  --blue-100:#DDEAFF;
  --blue-50:#EFF5FF;

  --ink:#12224A;
  --ink-2:#3B4E77;
  --ink-3:#6B7C9E;

  --warn:#F2B04C;
  --ok:#1E9E6A;

  --white:#fff;
  --radius-sm:14px;
  --radius:20px;
  --radius-lg:28px;
  --radius-pill:999px;

  --shadow-sm:0 6px 18px rgba(46,99,216,.08);
  --shadow:0 14px 34px rgba(46,99,216,.12);
  --shadow-lg:0 26px 60px rgba(31,79,190,.18);

  --container:1200px;
  --header-h:84px;

  --font:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
/* hidden 属性优先级最高：避免被 .btn{display:inline-flex} 之类的规则覆盖 */
[hidden]{display:none !important}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px);-webkit-text-size-adjust:100%}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:#fff;
  line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p,ul{margin:0}
ul{padding:0;list-style:none}
button{font:inherit}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 32px}
.skip-link{position:absolute;left:-9999px;top:0;z-index:200;background:var(--blue-600);color:#fff;padding:10px 18px;border-radius:0 0 12px 0}
.skip-link:focus{left:0}

/* ---------- 按钮（沿用主界面风格） ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border:1px solid transparent;border-radius:var(--radius-pill);
  font-size:15px;font-weight:700;letter-spacing:.2px;cursor:pointer;white-space:nowrap;
  transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease;
}
.btn svg{width:19px;height:19px;flex:none}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-primary{
  color:#fff;background:linear-gradient(135deg,#5B90F5,#2C63DE 62%,#2455C8);
  box-shadow:0 12px 26px rgba(46,99,216,.32),inset 0 1px 0 rgba(255,255,255,.35);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px rgba(46,99,216,.4)}
.btn-ghost{color:var(--blue-600);background:#fff;border-color:#D7E4FA;box-shadow:var(--shadow-sm)}
.btn-ghost:hover{transform:translateY(-2px);border-color:#B8D0F7;box-shadow:var(--shadow)}
.btn-white{background:#fff;color:var(--blue-700);box-shadow:0 14px 30px rgba(9,32,79,.24)}
.btn-white:hover{transform:translateY(-2px)}
.btn-outline-light{color:#fff;border-color:rgba(255,255,255,.55);background:rgba(255,255,255,.08)}
.btn-outline-light:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}

/* ---------- 导航（与首页一致） ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:100;height:var(--header-h);
  display:flex;align-items:center;
  background:rgba(255,255,255,.72);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(216,231,255,0);
  transition:background-color .3s ease,box-shadow .3s ease,border-color .3s ease,height .3s ease;
}
.site-header.is-stuck{
  background:rgba(255,255,255,.9);border-bottom-color:rgba(216,231,255,.9);
  box-shadow:0 10px 30px rgba(31,79,190,.08);height:70px;
}
.header-inner{display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-mark{width:52px;height:52px;flex:none;display:grid;place-items:center}
.brand-mark img{width:100%;height:100%;object-fit:contain}
.brand-mark.small{width:46px;height:46px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:21px;font-weight:900;letter-spacing:1px;color:var(--blue-600)}
.brand-text em{font-style:normal;font-size:12.5px;color:var(--ink-3);letter-spacing:.6px}
.nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;gap:7px;
  padding:10px 14px;border-radius:12px;font-size:15px;font-weight:500;color:var(--ink-2);
  /* 与首页一致：用描边模拟加粗，避免高亮切换导致整条导航位移 */
  text-shadow:0 0 0 transparent;
  transition:color .2s ease,background-color .2s ease,text-shadow .2s ease;
}
.nav-link:hover{color:var(--blue-600);background:var(--blue-50);text-shadow:0 0 .6px currentColor}
.nav-link svg{width:17px;height:17px;fill:currentColor;opacity:.85}
.nav-link svg.ico-line{fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.nav-link.is-active{color:var(--blue-600);font-weight:500;text-shadow:0 0 .7px currentColor}
.nav-link.is-active::after{
  content:"";position:absolute;left:50%;bottom:-2px;transform:translateX(-50%);
  width:22px;height:3px;border-radius:3px;background:var(--blue-500);
}
.header-actions{display:flex;align-items:center;gap:14px;flex:none}
/* 与首页保持一致：登录按钮尺寸、字号完全对齐，避免导航整体位移 */
.btn-login{padding:10px 22px}
.btn-login svg{width:17px;height:17px;fill:currentColor}
.btn-login[hidden]{display:none}

/* ---------- 登录后的账号按钮 / 菜单 / 个人中心（与首页同款） ---------- */
.account{position:relative}
.account[hidden]{display:none}
.account-btn{
  display:inline-flex;align-items:center;gap:9px;
  height:44px;padding:0 14px 0 6px;border-radius:999px;cursor:pointer;
  border:1px solid #DCE8FB;background:#fff;color:var(--blue-900);
  font-size:14px;font-weight:700;box-shadow:var(--shadow-sm);
  transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
}
.account-btn:hover{border-color:#B8D0F7;box-shadow:var(--shadow);transform:translateY(-1px)}
.account-avatar{
  width:32px;height:32px;border-radius:50%;flex:none;
  display:grid;place-items:center;position:relative;overflow:hidden;
  background-color:#DCE9FF;background-image:linear-gradient(135deg,#5B90F5,#2C63DE);
  background-size:cover;background-position:center;
  color:#fff;font-size:13px;font-weight:800;font-style:normal;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.5);
}
.account-avatar.has-img{background-color:#EAF2FF}
.account-caret{width:16px;height:16px;color:var(--ink-3);transition:transform .2s ease}
.account-btn[aria-expanded="true"] .account-caret{transform:rotate(180deg)}
.account-menu{
  position:absolute;right:0;top:calc(100% + 10px);z-index:60;
  width:212px;padding:10px;border-radius:18px;
  background:#fff;border:1px solid #E6EFFD;box-shadow:var(--shadow-lg);
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
}
.account-menu.is-open{opacity:1;visibility:visible;transform:none}
.account-menu-head{padding:8px 10px 10px;font-size:12.5px;color:var(--ink-3);border-bottom:1px solid #F0F5FE;margin-bottom:6px}
.account-menu-head strong{color:var(--blue-700)}
.account-menu a,.account-menu button{
  display:block;width:100%;text-align:left;padding:10px;border:0;border-radius:11px;
  background:none;cursor:pointer;font:inherit;font-size:14px;color:var(--ink-2);font-weight:600;
  transition:background-color .18s ease,color .18s ease;
}
.account-menu a:hover,.account-menu button:hover{background:var(--blue-50);color:var(--blue-600)}
.account-menu button{border-top:1px solid #F0F5FE;border-radius:0 0 11px 11px;color:#D8524F}
.account-menu button:hover{background:#FFF3F2;color:#C74340}
.account-menu [data-acc-open],.account-menu [data-acc-view]{border-top:0;border-radius:11px;color:var(--ink-2)}
.account-menu [data-acc-open]:hover,.account-menu [data-acc-view]:hover{background:var(--blue-50);color:var(--blue-600)}
.account-menu .account-menu-head + button{border-top:0}

/* ---------- 个人中心弹窗（工具页 / 登录页也可打开） ---------- */
.modal{position:fixed;inset:0;z-index:200;display:grid;place-items:center;padding:24px}
.modal[hidden]{display:none}
.modal-mask{position:absolute;inset:0;background:rgba(12,32,72,.46);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.modal-card{position:relative;border-radius:30px;background:#fff;overflow:hidden;box-shadow:0 40px 90px rgba(12,36,84,.4)}
.modal-close{
  position:absolute;top:16px;right:16px;z-index:5;width:38px;height:38px;border-radius:12px;
  display:grid;place-items:center;cursor:pointer;border:1px solid #E4EDFB;background:#fff;color:var(--ink-3);
  transition:color .2s ease,background-color .2s ease,transform .2s ease;
}
.modal-close svg{width:18px;height:18px}
.modal-close:hover{color:var(--blue-600);background:var(--blue-50);transform:rotate(90deg)}
.account-card{width:min(600px,100%);max-height:calc(100vh - 48px);display:block;overflow-y:auto}
.account-pane{padding:34px 38px 32px}
.account-pane[hidden]{display:none}
.account-head h2{font-size:22px;font-weight:900;color:var(--blue-900);letter-spacing:.5px}
.account-head p{margin-top:7px;font-size:13.5px;color:var(--ink-3)}
.avatar-editor{
  display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-top:22px;padding:20px;
  border-radius:var(--radius);background:linear-gradient(135deg,#F4F8FF,#EAF2FF);border:1px solid #E4EDFB;
}
.avatar-xl{width:84px;height:84px;font-size:30px;box-shadow:0 8px 20px rgba(46,99,216,.18),inset 0 0 0 2px rgba(255,255,255,.7)}
.avatar-actions{display:flex;gap:10px;flex-wrap:wrap}
.btn-sm{padding:9px 16px;font-size:13.5px}
.account-form{display:grid;gap:16px;margin-top:22px}
.field{display:grid;gap:8px}
.field-label{font-size:13.5px;font-weight:700;color:var(--ink-2)}
.field-input{
  display:flex;align-items:center;gap:10px;padding:0 14px;height:50px;border-radius:14px;
  background:#F7FAFF;border:1.5px solid #E4EDFB;
  transition:border-color .2s ease,background-color .2s ease,box-shadow .2s ease;
}
.field-input:focus-within{background:#fff;border-color:#8FB4F2;box-shadow:0 0 0 4px rgba(76,132,243,.14)}
.field-input > svg{width:18px;height:18px;flex:none;fill:var(--blue-300)}
.field-input input{flex:1;min-width:0;height:100%;border:0;background:none;outline:none;font:inherit;font-size:14.5px;color:var(--ink)}
.account-foot{display:flex;gap:12px;flex-wrap:wrap;margin-top:6px}
.auth-error{min-height:20px;font-size:13px;font-weight:600;color:#D8524F}
.auth-error:empty{visibility:hidden}
.crop-pane{padding:34px 38px 32px}
.crop-main{display:flex;gap:22px;align-items:center;margin-top:20px;flex-wrap:wrap}
.crop-stage{width:260px;height:260px;flex:none;border-radius:24px;background:#0E1F44;overflow:hidden;box-shadow:0 18px 40px rgba(12,36,84,.28)}
#cropCanvas{display:block;width:100%;height:100%;cursor:grab;touch-action:none}
.crop-side{display:grid;gap:9px;justify-items:center}
.crop-side-label{font-size:12.5px;font-weight:700;color:var(--ink-3)}
.crop-preview{width:120px;height:120px;border-radius:50%;background:#fff;box-shadow:0 8px 20px rgba(46,99,216,.16),0 0 0 1px #E4EDFB}
.crop-controls{display:flex;align-items:center;gap:14px;margin-top:22px}
.crop-controls label{font-size:13.5px;font-weight:700;color:var(--ink-2);flex:none}
.crop-controls input[type="range"]{flex:1;-webkit-appearance:none;appearance:none;height:6px;border-radius:4px;background:linear-gradient(90deg,#8FB4F2,#DDEAFF);outline:none}
.crop-controls input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;cursor:pointer;background:#fff;border:2px solid var(--blue-500);box-shadow:0 4px 10px rgba(46,99,216,.28)}
.crop-actions{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}
.records{display:grid;gap:14px;margin-top:20px}
.account-empty{padding:26px 22px;border-radius:var(--radius);text-align:center;background:#F7FAFF;border:1.5px dashed #DCE8FB;font-size:14px;color:var(--ink-3)}
.account-empty a{color:var(--blue-600);font-weight:700}
.record{padding:20px 22px;border-radius:var(--radius);background:#fff;border:1px solid #E8F0FD;box-shadow:var(--shadow-sm);display:grid;gap:12px}
.record-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.record-head b{font-size:16px;font-weight:800;color:var(--blue-900)}
.record-tag{padding:5px 12px;border-radius:999px;font-size:12px;font-weight:700;background:var(--blue-50);color:var(--blue-600);border:1px solid #DCE8FB}
.record-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px 18px}
.record-grid div{display:flex;align-items:baseline;justify-content:space-between;gap:10px;font-size:13.5px}
.record-grid span{color:var(--ink-3)}
.record-grid b{color:var(--blue-900);font-weight:700;word-break:break-all;text-align:right}
.record-bio{font-size:13.5px;line-height:1.75;color:var(--ink-2);padding:12px 14px;border-radius:12px;background:#F7FAFF;white-space:pre-wrap}
.record .btn{justify-self:start}
.is-shake{animation:shake .4s cubic-bezier(.36,.07,.19,.97)}
@keyframes shake{
  10%,90%{transform:translateX(-2px)}20%,80%{transform:translateX(4px)}
  30%,50%,70%{transform:translateX(-6px)}40%,60%{transform:translateX(6px)}
}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;border:1px solid #E1EBFB;background:#fff;cursor:pointer;
  flex-direction:column;align-items:center;justify-content:center;gap:5px;padding:0;
}
.nav-toggle span{display:block;width:20px;height:2px;border-radius:2px;background:var(--blue-600);transition:transform .25s ease,opacity .25s ease}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.is-open span:nth-child(2){opacity:0}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 页头横幅 ---------- */
.tools-hero{
  position:relative;overflow:hidden;
  padding:calc(var(--header-h) + 52px) 0 74px;
  background:
    radial-gradient(880px 480px at 78% 0%,rgba(168,203,255,.5),rgba(233,241,255,0) 68%),
    linear-gradient(180deg,#F4F8FF 0%,#EAF2FF 52%,#E6EFFF 100%);
}
.tools-grid-bg{
  position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right,rgba(120,164,232,.15) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(120,164,232,.15) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(120% 90% at 24% 20%,#000,rgba(0,0,0,.3) 50%,transparent 80%);
  mask-image:radial-gradient(120% 90% at 24% 20%,#000,rgba(0,0,0,.3) 50%,transparent 80%);
}
.tools-hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1.2fr) minmax(360px,1fr);gap:40px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:7px 16px 7px 12px;border-radius:var(--radius-pill);
  background:rgba(255,255,255,.85);border:1px solid #D9E7FE;color:var(--blue-600);
  font-size:13.5px;font-weight:700;letter-spacing:.4px;box-shadow:var(--shadow-sm);
}
.eyebrow svg{width:17px;height:17px}
.tools-hero h1{
  margin-top:22px;font-size:clamp(32px,3.4vw,50px);line-height:1.24;font-weight:900;
  letter-spacing:1px;color:var(--blue-900);
}
.tools-hero h1 .hl{color:var(--blue-500)}
.tools-hero-sub{margin-top:18px;font-size:16px;color:var(--ink-2);max-width:60ch}
.tools-hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}

/* 搜索框 */
.tools-search{
  position:relative;display:flex;align-items:center;gap:10px;
  margin-top:30px;padding:8px 8px 8px 20px;max-width:620px;
  background:#fff;border:1.5px solid #DCE8FB;border-radius:var(--radius-pill);
  box-shadow:0 18px 40px rgba(31,79,190,.14);
  transition:border-color .2s ease,box-shadow .2s ease;
}
.tools-search:focus-within{border-color:#8FB4F2;box-shadow:0 0 0 5px rgba(76,132,243,.14),0 18px 40px rgba(31,79,190,.16)}
.tools-search > svg{width:20px;height:20px;flex:none;fill:var(--blue-300)}
.tools-search input{
  flex:1;min-width:0;height:44px;border:0;background:none;outline:none;
  font:inherit;font-size:15px;color:var(--ink);
}
.tools-search input::placeholder{color:#A8B6CE}
.tools-search kbd{
  flex:none;padding:5px 9px;border-radius:8px;background:var(--blue-50);
  border:1px solid #DCE8FB;font-family:inherit;font-size:12px;color:var(--ink-3);
}

/* 页头统计 */
.tools-stat{
  position:relative;z-index:2;display:grid;gap:14px;
  padding:26px;border-radius:var(--radius-lg);
  background:rgba(255,255,255,.9);border:1px solid #E4EDFB;box-shadow:var(--shadow);
}
.tools-stat h3{font-size:15px;font-weight:800;color:var(--blue-900);letter-spacing:.4px}
.tools-stat-row{display:flex;align-items:baseline;justify-content:space-between;gap:12px;font-size:14px;color:var(--ink-3)}
.tools-stat-row b{font-size:22px;font-weight:900;color:var(--blue-500)}
.tools-stat-bar{height:8px;border-radius:6px;background:#EDF3FE;overflow:hidden}
.tools-stat-bar i{display:block;height:100%;border-radius:6px;background:linear-gradient(90deg,#8FB4F2,#2C63DE)}
.tools-stat-note{font-size:12.5px;color:#9AA8C0;line-height:1.7}

/* ---------- 网盘链接卡片（页头右侧） ---------- */
.hero-link-card{
  position:relative;z-index:2;
  display:grid;gap:18px;
  padding:28px 28px 24px;border-radius:var(--radius-lg);
  background:rgba(255,255,255,.94);border:1px solid #E4EDFB;
  box-shadow:0 26px 58px rgba(31,79,190,.16);
}
.hlc-head{display:flex;align-items:center;gap:14px}
.hlc-ico{
  width:52px;height:52px;flex:none;border-radius:16px;display:grid;place-items:center;
  background:linear-gradient(150deg,#E9F2FF,#D3E4FF);box-shadow:inset 0 1px 0 #fff;
  color:var(--blue-500);
}
.hlc-ico svg{width:30px;height:30px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.hlc-head h2{font-size:18px;font-weight:900;color:var(--blue-900);letter-spacing:.4px}
.hlc-head p{margin-top:4px;font-size:12.5px;color:var(--ink-3)}

.hlc-field{display:grid;gap:8px}
.hlc-field label{font-size:13px;font-weight:700;color:var(--ink-2)}
.hlc-input{
  display:flex;align-items:center;gap:8px;
  padding:8px 8px 8px 14px;border-radius:14px;
  background:#F7FAFF;border:1.5px solid #E4EDFB;
  transition:border-color .2s ease,background-color .2s ease,box-shadow .2s ease;
}
.hlc-input:focus-within{background:#fff;border-color:#8FB4F2;box-shadow:0 0 0 4px rgba(76,132,243,.14)}
.hlc-value{
  flex:1;min-width:0;padding:9px 0;
  font-size:13.5px;line-height:1.55;color:var(--blue-800);font-weight:600;
  overflow-wrap:anywhere;word-break:break-word;
}
.hlc-copy{
  width:38px;height:38px;flex:none;border-radius:11px;display:grid;place-items:center;cursor:pointer;
  border:1.5px solid #E4EDFB;background:#fff;color:var(--ink-3);
  transition:border-color .2s ease,color .2s ease,background-color .2s ease,transform .2s ease;
}
.hlc-copy svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.hlc-copy:hover{border-color:#C6D8F5;color:var(--blue-600);background:var(--blue-50);transform:translateY(-1px)}

.hlc-actions{display:grid;grid-template-columns:1.25fr 1fr;gap:12px;margin-top:2px}
.hlc-open{gap:6px}

.hlc-notes{display:grid;gap:10px;padding-top:16px;border-top:1px dashed #E8EFFB}
.hlc-notes li{display:flex;align-items:flex-start;gap:9px;font-size:12.5px;line-height:1.65;color:var(--ink-3)}
.hlc-notes svg{width:17px;height:17px;flex:none;margin-top:2px;padding:3px;border-radius:50%;background:var(--blue-50);color:var(--blue-500)}

/* ---------- 卡片内的链接行 ---------- */
.tool-link{
  display:flex;align-items:center;gap:9px;
  padding:9px 10px 9px 12px;border-radius:13px;
  background:#F7FAFF;border:1px solid #E8F0FD;
}
.tool-link > svg{width:17px;height:17px;flex:none;color:var(--blue-400)}
.tool-link-url{
  flex:1;min-width:0;font-size:12.5px;font-weight:600;color:var(--blue-700);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
a.tool-link-url:hover{text-decoration:underline}
.tool-link-pwd{
  flex:none;padding:5px 10px;border-radius:9px;cursor:pointer;
  border:1px solid #DCE8FB;background:#fff;
  font:inherit;font-size:12px;font-weight:700;color:var(--blue-600);
  transition:background-color .2s ease,border-color .2s ease;
}
.tool-link-pwd:hover{background:var(--blue-50);border-color:#C6D8F5}

/* 主行动按钮（打开网盘） */
.icon-btn.is-primary{
  border-color:transparent;color:#fff;
  background:linear-gradient(135deg,#5B90F5,#2C63DE);
  box-shadow:0 8px 18px rgba(46,99,216,.28);
}
.icon-btn.is-primary:hover{color:#fff;background:linear-gradient(135deg,#6C9CF8,#2A5FD6);transform:translateY(-1px)}

/* ---------- 筛选栏 ---------- */
.tools-bar{
  position:sticky;top:var(--header-h);z-index:50;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid #EAF1FD;
}
.tools-bar-inner{display:flex;align-items:center;gap:18px;padding:14px 0;flex-wrap:wrap}
.chips{display:flex;align-items:center;gap:10px;flex-wrap:wrap;min-width:0}
.chip{
  display:inline-flex;align-items:center;gap:7px;
  padding:9px 16px;border-radius:var(--radius-pill);cursor:pointer;
  border:1.5px solid #E4EDFB;background:#fff;color:var(--ink-2);
  font-size:14px;font-weight:600;
  transition:border-color .2s ease,color .2s ease,background-color .2s ease,transform .2s ease;
}
.chip b{font-size:12px;font-weight:800;color:var(--blue-400)}
.chip:hover{border-color:#C6D8F5;color:var(--blue-600);transform:translateY(-1px)}
.chip.is-active{
  color:#fff;border-color:transparent;
  background:linear-gradient(135deg,#5B90F5,#2C63DE);
  box-shadow:0 10px 22px rgba(46,99,216,.26);
}
.chip.is-active b{color:rgba(255,255,255,.8)}
.tools-bar-right{display:flex;align-items:center;gap:12px;margin-left:auto}
.select-wrap{position:relative;display:inline-flex;align-items:center}
.select-wrap svg{position:absolute;right:12px;width:16px;height:16px;pointer-events:none;fill:none;stroke:var(--ink-3);stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.select-wrap select{
  appearance:none;-webkit-appearance:none;
  padding:10px 36px 10px 16px;border-radius:var(--radius-pill);cursor:pointer;
  border:1.5px solid #E4EDFB;background:#fff;color:var(--ink-2);
  font:inherit;font-size:14px;font-weight:600;outline:none;
}
.select-wrap select:focus{border-color:#8FB4F2;box-shadow:0 0 0 4px rgba(76,132,243,.14)}
.tools-count{font-size:13.5px;color:var(--ink-3);white-space:nowrap}
.tools-count b{color:var(--blue-600)}

/* ---------- 工具卡片 ---------- */
.tools-section{padding:44px 0 90px;background:linear-gradient(180deg,#FFFFFF,#F7FAFF)}
.tools-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.tool-card{
  position:relative;display:flex;flex-direction:column;gap:16px;
  padding:26px 24px 22px;border-radius:var(--radius-lg);
  background:#fff;border:1px solid #E8F0FD;box-shadow:var(--shadow-sm);
  transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
}
.tool-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:#D3E3FF}
.tool-head{display:flex;align-items:flex-start;gap:14px}
.tool-ico{
  width:52px;height:52px;flex:none;border-radius:16px;display:grid;place-items:center;
  background:linear-gradient(150deg,#E9F2FF,#D3E4FF);box-shadow:inset 0 1px 0 #fff;
  color:var(--blue-500);
}
.tool-ico svg{width:28px;height:28px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.tool-ico.is-web{color:#2C63DE}
.tool-ico.is-pwn{color:#C4644A;background:linear-gradient(150deg,#FFF3EF,#FBE1D9)}
.tool-ico.is-crypto{color:#7A5AC4;background:linear-gradient(150deg,#F5F1FF,#E4DBFB)}
.tool-ico.is-reverse{color:#1E8E6E;background:linear-gradient(150deg,#EFFBF6,#D3F0E4)}
.tool-ico.is-misc{color:#C08A2E;background:linear-gradient(150deg,#FFFAF0,#F7E9CB)}
.tool-ico.is-env{color:#4C6B8A;background:linear-gradient(150deg,#F5F9FC,#DEE9F2)}
.tool-title{min-width:0}
.tool-title h3{font-size:18px;font-weight:800;color:var(--blue-900);letter-spacing:.3px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.tool-title h3 span{font-size:13px;font-weight:600;color:var(--ink-3)}
.tool-title p{margin-top:5px;font-size:13px;color:var(--ink-3)}
.tool-desc{font-size:14px;line-height:1.78;color:var(--ink-2);flex:1}
.tool-tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  padding:5px 11px;border-radius:9px;font-size:12.5px;font-weight:600;
  background:var(--blue-50);color:var(--blue-600);border:1px solid #DCE8FB;
}
.tag-cat{background:#fff;border-color:#E4EDFB;color:var(--ink-3)}
.tag-cat.is-web{color:#2C63DE;border-color:#CFE0FF;background:#F3F8FF}
.tag-cat.is-pwn{color:#B4553F;border-color:#F6DCD4;background:#FFF7F5}
.tag-cat.is-crypto{color:#7A5AC4;border-color:#E4DCF8;background:#F8F5FF}
.tag-cat.is-reverse{color:#1E8E6E;border-color:#CFEFE3;background:#F2FCF8}
.tag-cat.is-misc{color:#C08A2E;border-color:#F6E7C6;background:#FFFBF2}
.tag-cat.is-env{color:#4C6B8A;border-color:#DDE7F0;background:#F6F9FC}
.tool-foot{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding-top:16px;border-top:1px dashed #E8EFFB;
}
.tool-meta{display:flex;align-items:center;gap:16px;font-size:12.5px;color:var(--ink-3)}
.tool-meta span{display:inline-flex;align-items:center;gap:5px}
.tool-meta svg{width:15px;height:15px;fill:var(--blue-300)}
.tool-actions{display:flex;align-items:center;gap:8px}
.icon-btn{
  width:38px;height:38px;border-radius:12px;display:grid;place-items:center;cursor:pointer;
  border:1.5px solid #E4EDFB;background:#fff;color:var(--ink-3);
  transition:border-color .2s ease,color .2s ease,background-color .2s ease,transform .2s ease;
}
.icon-btn svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}
.icon-btn:hover{border-color:#C6D8F5;color:var(--blue-600);background:var(--blue-50);transform:translateY(-1px)}
.icon-btn.is-on{border-color:transparent;color:#fff;background:linear-gradient(135deg,#5B90F5,#2C63DE)}
.icon-btn.is-on svg{fill:currentColor;stroke:none}

/* 空状态 */
.tools-empty{
  display:none;padding:70px 20px;text-align:center;
  border:1.5px dashed #DCE8FB;border-radius:var(--radius-lg);background:#fff;
}
.tools-empty.is-on{display:block}
.tools-empty strong{display:block;font-size:18px;font-weight:800;color:var(--blue-900)}
.tools-empty p{margin-top:10px;font-size:14px;color:var(--ink-3)}

/* ---------- 页脚 ---------- */
.site-footer{background:#0F2350;color:rgba(255,255,255,.72);padding:62px 0 32px}
.footer-inner{
  display:grid;gap:44px 44px;
  grid-template-columns:minmax(0,1fr) minmax(0,1.05fr) auto;
  align-items:start;
}
/* 左列：品牌与导航同一条左基线，整体撑满页脚高度 */
.footer-left{
  display:flex;flex-direction:column;justify-content:space-between;
  gap:38px;align-self:stretch;min-height:100%;
}
/* logo 与右侧文字顶对齐（原先 align-items:center 让它被垂直居中，显得偏低） */
.footer-brand{display:flex;align-items:flex-start;gap:14px}
.footer-brand .brand-mark{margin-top:6px}
.footer-brand strong{display:block;color:#fff;font-size:17px;font-weight:800;letter-spacing:.4px}
.footer-brand p{font-size:13px;margin-top:4px}

/* 学校入口：与上文再拉开一档距离，整体靠下 */
.school-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:34px}
.school-link{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 14px;border-radius:10px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.1);
  color:rgba(255,255,255,.82);font-size:12.5px;font-weight:600;letter-spacing:.2px;
  transition:background-color .2s ease,border-color .2s ease,color .2s ease,transform .2s ease;
}
.school-link > svg{width:15px;height:15px;flex:none;color:#9DC0FF}
.school-link .ext{width:13px;height:13px;opacity:.6}
.school-link:hover{
  background:rgba(157,192,255,.16);border-color:rgba(157,192,255,.42);
  color:#fff;transform:translateY(-1px);
}
.school-link:hover .ext{opacity:1}

/* 联系方式 */
.footer-col-title{
  display:flex;align-items:center;gap:9px;min-height:20px;
  font-size:13px;font-weight:800;letter-spacing:1.2px;color:#fff;
  margin-bottom:16px;
}
.footer-col-title::before{
  content:"";width:4px;height:14px;border-radius:2px;background:var(--blue-400);flex:none;
}
.contact-list{display:grid;gap:12px}
.contact-list li{
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:10px;
  font-size:14px;padding:10px 14px;border-radius:12px;background:rgba(255,255,255,.05);
}
.contact-ico{
  width:28px;height:28px;flex:none;border-radius:9px;display:grid;place-items:center;
  background:rgba(255,255,255,.1);color:#9DC0FF;
}
.contact-ico svg{width:16px;height:16px}
.contact-name{color:rgba(255,255,255,.88);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.contact-tel{
  color:#fff;font-weight:700;letter-spacing:.4px;white-space:nowrap;
  border-bottom:1px dashed rgba(157,192,255,.5);
  transition:color .2s ease,border-color .2s ease;
}
.contact-tel:hover{color:#9DC0FF;border-bottom-color:#9DC0FF}
.contact-note{margin-top:12px;font-size:12.5px;color:rgba(255,255,255,.42)}

/* 公众号二维码 */
.footer-qr{display:flex;flex-direction:column;align-items:center;text-align:center;width:150px}
.footer-qr img{
  width:118px;height:118px;border-radius:14px;background:#fff;padding:6px;
  box-shadow:0 10px 26px rgba(0,0,0,.28);
  transition:transform .25s ease,box-shadow .25s ease;
}
.footer-qr img:hover{transform:translateY(-3px) scale(1.03);box-shadow:0 16px 34px rgba(0,0,0,.36)}
.qr-note{margin-top:12px;font-size:12px;line-height:1.6;color:rgba(255,255,255,.5)}

.footer-links{grid-column:1 / -1;display:flex;gap:26px;font-size:14px;flex-wrap:wrap;padding-top:6px}
.footer-links a{transition:color .2s ease}
.footer-links a:hover{color:#fff}
.footer-copy{
  grid-column:1 / -1;border-top:1px solid rgba(255,255,255,.12);
  padding-top:22px;font-size:12.5px;color:rgba(255,255,255,.5);
}
.footer-legal{
  grid-column:1 / -1;margin:-12px 0 0;padding:0;
  font-size:12.5px;color:rgba(255,255,255,.5);
}
.footer-legal a{color:rgba(255,255,255,.5);text-decoration:none}
.footer-legal a:hover{color:rgba(255,255,255,.85);text-decoration:underline}

/* ---------- 入场动画 ---------- */
.js [data-reveal]{opacity:0;transform:translateY(24px);transition:opacity .6s cubic-bezier(.22,.7,.3,1),transform .6s cubic-bezier(.22,.7,.3,1)}
.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- 轻提示 ---------- */
.toast{
  position:fixed;left:50%;bottom:34px;z-index:300;transform:translate(-50%,16px);
  display:flex;align-items:center;gap:10px;padding:13px 22px;border-radius:var(--radius-pill);
  background:rgba(16,38,80,.94);color:#fff;font-size:14px;font-weight:600;
  box-shadow:0 18px 40px rgba(12,36,84,.34);opacity:0;pointer-events:none;
  transition:opacity .26s ease,transform .26s ease;
}
.toast.is-on{opacity:1;transform:translate(-50%,0)}
.toast::before{content:"";width:8px;height:8px;border-radius:50%;background:#6FE3A8}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .tools-hero-inner{grid-template-columns:1fr;gap:26px}
  .tools-stat{max-width:520px}
  .tools-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .nav{
    position:absolute;top:calc(var(--header-h) - 6px);left:24px;right:24px;
    flex-direction:column;align-items:stretch;gap:4px;padding:14px;
    background:#fff;border:1px solid #E6EFFD;border-radius:22px;box-shadow:var(--shadow-lg);
    opacity:0;visibility:hidden;transform:translateY(-10px);
    transition:opacity .22s ease,transform .22s ease,visibility .22s ease;
  }
  .nav.is-open{opacity:1;visibility:visible;transform:none}
  .nav-link.is-active::after{display:none}
  .nav-toggle{display:flex}
  .btn-login{display:none}
  .tools-bar{top:70px}
}
@media (max-width:680px){
  .container{padding:0 20px}
  .tools-hero{padding:calc(var(--header-h) + 34px) 0 56px}
  .tools-hero-sub{font-size:15px}
  .tools-search{padding:6px 6px 6px 16px}
  .tools-search kbd{display:none}
  .tools-grid{grid-template-columns:1fr}
  .tools-bar-inner{gap:12px;padding:12px 0}
  .tools-bar-right{width:100%;margin-left:0;justify-content:space-between}
  .chip{padding:8px 13px;font-size:13px}
  .tool-card{padding:22px 20px 18px}
  .footer-inner{grid-template-columns:1fr;gap:36px}
  .footer-left{gap:28px}
  .footer-qr{width:100%;flex-direction:row;flex-wrap:wrap;align-items:center;justify-content:flex-start;text-align:left;gap:16px}
  .footer-qr .footer-col-title{flex-basis:100%;margin-bottom:0}
  .footer-qr img{width:104px;height:104px}
  .qr-note{margin-top:0;flex:1;min-width:120px}
  .contact-list li{font-size:13.5px;grid-template-columns:auto 1fr;row-gap:4px}
  .contact-tel{grid-column:2;justify-self:start}
  .footer-links{flex-wrap:wrap;gap:16px}
  .toast{left:16px;right:16px;transform:translate(0,16px);justify-content:center;text-align:center}
  .toast.is-on{transform:translate(0,0)}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .js [data-reveal]{opacity:1;transform:none}
}