/* ========================================================================
   DocTool 文档工具箱 · 设计系统 v2（品牌化 / 暗色 / 动效）
   ======================================================================== */
:root{
  --bg:#f6f8fd; --bg2:#eef2fb; --card:#ffffff; --card2:#fbfcff;
  --ink:#0f172a; --sub:#64748b; --sub2:#94a3b8;
  --brand:#6366f1; --brand2:#8b5cf6; --accent:#06b6d4; --brand-d:#4f46e5;
  --line:#e6eaf3; --line2:#eef1f8;
  --ok:#16a34a; --warn:#f59e0b; --err:#ef4444;
  --grad:linear-gradient(135deg,#6366f1 0%,#8b5cf6 50%,#06b6d4 100%);
  --grad-soft:linear-gradient(135deg,rgba(99,102,241,.12),rgba(6,182,212,.12));
  --shadow-sm:0 2px 8px rgba(30,41,99,.06);
  --shadow:0 12px 34px rgba(30,41,99,.10);
  --shadow-lg:0 26px 60px rgba(30,41,99,.16);
  --radius:18px; --radius-sm:12px;
  --header-h:68px;
}
[data-theme="dark"]{
  --bg:#0a0f1f; --bg2:#0c1326; --card:#141b30; --card2:#101730;
  --ink:#e9edf8; --sub:#9aa6c4; --sub2:#6b789c;
  --line:#243049; --line2:#1c2540;
  --grad-soft:linear-gradient(135deg,rgba(99,102,241,.18),rgba(6,182,212,.16));
  --shadow-sm:0 2px 10px rgba(0,0,0,.3);
  --shadow:0 14px 40px rgba(0,0,0,.45);
  --shadow-lg:0 30px 70px rgba(0,0,0,.55);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.6;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit}
img{max-width:100%}

/* ---------------- 滚动揭示 / 微动效 ---------------- */
@keyframes floatUp{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
@keyframes pop{0%{transform:scale(.96);opacity:0}100%{transform:scale(1);opacity:1}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes blob{0%,100%{transform:translate(0,0) scale(1)}33%{transform:translate(30px,-20px) scale(1.1)}66%{transform:translate(-20px,20px) scale(.95)}}
@keyframes shimmer{0%{background-position:-400px 0}100%{background-position:400px 0}}
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal[data-delay="1"]{transition-delay:.08s}
.reveal[data-delay="2"]{transition-delay:.16s}
.reveal[data-delay="3"]{transition-delay:.24s}
.reveal[data-delay="4"]{transition-delay:.32s}

/* ---------------- 顶部导航 ---------------- */
.topbar{
  position:sticky;top:0;z-index:40;height:var(--header-h);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 26px;
  background:color-mix(in srgb,var(--card) 82%,transparent);
  backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:19px;letter-spacing:.2px}
.brand .logo{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;background:var(--grad);box-shadow:var(--shadow-sm);font-size:18px}
.brand small{font-weight:500;color:var(--sub);font-size:12.5px;letter-spacing:.3px}
.nav{display:flex;gap:6px;align-items:center}
.nav a{font-size:14px;color:var(--sub);text-decoration:none;padding:8px 12px;border-radius:9px;transition:.18s;font-weight:500}
.nav a:hover{color:var(--ink);background:var(--bg2)}
.actions{display:flex;align-items:center;gap:10px}
.badge{font-size:12px;padding:5px 11px;border-radius:20px;background:var(--grad-soft);color:var(--brand);font-weight:700;letter-spacing:.3px}
.badge.pro{background:linear-gradient(135deg,#fde68a,#f59e0b);color:#7c2d12}
.icon-btn{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:var(--card);cursor:pointer;display:grid;place-items:center;font-size:17px;transition:.18s}
.icon-btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm)}

/* ---------------- 按钮 ---------------- */
.btn{border:none;border-radius:12px;padding:10px 18px;font-size:14px;cursor:pointer;background:var(--bg2);color:var(--ink);font-weight:600;transition:.18s;font-family:inherit}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.btn:active{transform:translateY(0)}
.btn.primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(99,102,241,.35)}
.btn.primary:hover{box-shadow:0 14px 34px rgba(99,102,241,.45);filter:brightness(1.04)}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--ink)}
.btn.run{background:var(--grad);color:#fff;margin-top:16px;padding:12px 22px;font-size:15px;box-shadow:0 10px 24px rgba(99,102,241,.3)}
.btn.lg{padding:14px 30px;font-size:16px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}

/* ---------------- Hero ---------------- */
.hero{position:relative;overflow:hidden;padding:84px 22px 70px;text-align:center}
.hero .blob{position:absolute;border-radius:50%;filter:blur(60px);opacity:.5;animation:blob 14s ease-in-out infinite;z-index:0}
.hero .b1{width:380px;height:380px;background:#8b5cf6;top:-120px;left:-80px}
.hero .b2{width:320px;height:320px;background:#06b6d4;top:-60px;right:-60px;animation-delay:-5s}
.hero .b3{width:300px;height:300px;background:#6366f1;bottom:-140px;left:40%;animation-delay:-9s}
.hero-inner{position:relative;z-index:1;max-width:880px;margin:0 auto}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--brand);
  background:var(--grad-soft);padding:7px 15px;border-radius:30px;margin-bottom:22px;border:1px solid var(--line)}
.hero h1{font-size:clamp(32px,5.5vw,56px);line-height:1.12;font-weight:850;letter-spacing:-.5px;margin-bottom:18px}
.hero h1 .g{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{font-size:clamp(15px,2.4vw,19px);color:var(--sub);max-width:640px;margin:0 auto 30px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.trust{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:34px}
.trust .t{display:inline-flex;align-items:center;gap:7px;font-size:13.5px;color:var(--sub);
  background:var(--card);border:1px solid var(--line);padding:8px 15px;border-radius:30px;box-shadow:var(--shadow-sm)}
.trust .t b{color:var(--ok)}

/* ---------------- 数据条 ---------------- */
.stats{max-width:1080px;margin:0 auto;padding:0 22px 10px;display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 18px;text-align:center;box-shadow:var(--shadow-sm);transition:.25s}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.stat .num{font-size:34px;font-weight:850;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.stat .lbl{font-size:13.5px;color:var(--sub);margin-top:8px}

/* ---------------- 通用区块 ---------------- */
section.block{padding:66px 22px;max-width:1120px;margin:0 auto}
.sec-head{text-align:center;max-width:680px;margin:0 auto 44px}
.sec-head .kicker{font-size:13px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--brand)}
.sec-head h2{font-size:clamp(26px,4vw,38px);font-weight:820;margin:10px 0 12px;letter-spacing:-.5px}
.sec-head p{color:var(--sub);font-size:16px}

/* ---------------- 功能墙 ---------------- */
.feat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px}
.feat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;cursor:pointer;
  transition:.25s;position:relative;overflow:hidden;box-shadow:var(--shadow-sm)}
.feat:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:color-mix(in srgb,var(--brand) 40%,var(--line))}
.feat::after{content:"";position:absolute;inset:0;background:var(--grad-soft);opacity:0;transition:.25s}
.feat:hover::after{opacity:1}
.feat .ic{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;font-size:22px;
  background:var(--grad-soft);margin-bottom:14px;position:relative}
.feat h3{font-size:16.5px;font-weight:700;margin-bottom:6px;position:relative}
.feat p{font-size:13.5px;color:var(--sub);position:relative}
.feat .pill{position:absolute;top:16px;right:16px;font-size:10px;font-weight:700;color:#7c2d12;
  background:linear-gradient(135deg,#fde68a,#f59e0b);padding:3px 9px;border-radius:20px;position:relative;z-index:2}
.feat .go{margin-top:14px;font-size:13px;font-weight:600;color:var(--brand);position:relative}

/* ---------------- 步骤 ---------------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm)}
.step .n{width:42px;height:42px;border-radius:12px;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px;margin-bottom:16px}
.step h3{font-size:18px;margin-bottom:8px}
.step p{color:var(--sub);font-size:14.5px}

/* ---------------- 价格 ---------------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:stretch}
.plan{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;position:relative}
.plan.featured{border-color:transparent;background:linear-gradient(180deg,var(--card),var(--card2));box-shadow:var(--shadow-lg);transform:scale(1.03)}
.plan.featured::before{content:"";position:absolute;inset:0;border-radius:var(--radius);padding:1.5px;background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none}
.plan .tag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:12px;font-weight:700;padding:5px 14px;border-radius:20px;box-shadow:var(--shadow-sm)}
.plan h3{font-size:20px;font-weight:800}
.plan .desc2{color:var(--sub);font-size:13.5px;margin:6px 0 16px}
.plan .price{font-size:40px;font-weight:850;line-height:1}
.plan .price small{font-size:15px;color:var(--sub);font-weight:500}
.plan ul{list-style:none;margin:18px 0 22px;flex:1}
.plan li{padding:7px 0;font-size:14px;color:var(--ink);display:flex;gap:9px;align-items:flex-start}
.plan li .ck{color:var(--ok);font-weight:800}
.plan li.off{color:var(--sub2)}
.plan li.off .ck{color:var(--sub2)}

/* ---------------- 评价 ---------------- */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.review{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.review .stars{color:#f59e0b;font-size:15px;margin-bottom:10px}
.review p{font-size:14.5px;color:var(--ink);margin-bottom:16px}
.review .who{display:flex;align-items:center;gap:10px}
.review .av{width:38px;height:38px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:700}
.review .who .nm{font-size:14px;font-weight:700}
.review .who .rl{font-size:12px;color:var(--sub)}

/* ---------------- 下载/安装 ---------------- */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.dl{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm);text-align:center;transition:.25s}
.dl:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.dl .os{font-size:30px;margin-bottom:10px}
.dl h3{font-size:18px;margin-bottom:6px}
.dl .meta{font-size:13px;color:var(--sub);margin-bottom:14px}
.dl ol{text-align:left;font-size:13.5px;color:var(--sub);padding-left:18px;margin:14px 0}
.dl ol li{margin:5px 0}
.dl .qr{width:130px;height:130px;margin:10px auto;border:1px solid var(--line);border-radius:12px;padding:8px;background:#fff;display:grid;place-items:center}
.dl .qr img,.dl .qr canvas{width:100%!important;height:100%!important}
.dl .btn{width:100%;margin-top:8px}

/* ---------------- FAQ ---------------- */
.faq{max-width:760px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:14px;margin-bottom:12px;background:var(--card);overflow:hidden}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:18px 20px;cursor:pointer;font-weight:600;font-size:15.5px}
.faq-q .ar{transition:.25s;color:var(--brand);font-size:20px}
.faq-item.open .faq-q .ar{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;color:var(--sub);font-size:14.5px}
.faq-item.open .faq-a{max-height:260px}
.faq-a div{padding:0 20px 18px}

/* ---------------- 工作台 ---------------- */
.ws-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-bottom:22px}
.ws-head h2{font-size:28px;font-weight:820;letter-spacing:-.5px}
.ws-head p{color:var(--sub);font-size:14.5px;margin-top:4px}
.ws-grid{display:grid;grid-template-columns:260px 1fr;gap:22px;align-items:start}
.ws-side{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow-sm);position:sticky;top:calc(var(--header-h) + 14px);max-height:calc(100vh - var(--header-h) - 30px);overflow:auto}
.ws-side .grp{font-size:11px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--sub2);padding:12px 10px 6px}
.tab{display:flex;align-items:center;gap:10px;width:100%;text-align:left;border:1px solid transparent;background:transparent;
  padding:9px 11px;border-radius:11px;cursor:pointer;font-size:14px;color:var(--sub);transition:.15s;margin-bottom:2px;font-family:inherit}
.tab:hover{background:var(--bg2);color:var(--ink)}
.tab .ti{font-size:17px;width:22px;text-align:center}
.tab.active{background:var(--grad-soft);color:var(--brand);font-weight:700;border-color:color-mix(in srgb,var(--brand) 35%,transparent)}
.tab.active .ti{filter:none}
.pro-pill{margin-left:auto;background:linear-gradient(135deg,#fde68a,#f59e0b);color:#7c2d12;font-size:10px;padding:2px 7px;border-radius:8px;font-weight:800}

.ws-main{min-width:0}
.panel{display:none;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-sm);animation:pop .3s ease}
.panel.active{display:block}
.panel h2{font-size:22px;margin-bottom:6px;font-weight:800;display:flex;align-items:center;gap:10px}
.panel .desc{color:var(--sub);font-size:14.5px;margin-bottom:18px}
.dropzone{border:2px dashed var(--line);border-radius:14px;padding:30px 20px;text-align:center;color:var(--sub);cursor:pointer;transition:.18s;background:var(--card2)}
.dropzone:hover{border-color:var(--brand);color:var(--brand);background:var(--grad-soft)}
.dropzone.drag{border-color:var(--brand);background:var(--grad-soft);transform:scale(1.01)}
.field{display:block;margin-top:16px;font-size:14px;color:var(--sub);font-weight:500}
.field input,.field select{display:block;width:100%;margin-top:7px;padding:11px 13px;border:1px solid var(--line);border-radius:11px;font-size:14px;color:var(--ink);background:var(--card);font-family:inherit}
.field input:focus,.field select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--grad-soft)}
.filelist{margin-top:14px;font-size:13px;color:var(--sub);background:var(--card2);border-radius:10px;padding:6px 12px}
.filelist div{padding:5px 0;border-bottom:1px dashed var(--line)}
.filelist div:last-child{border-bottom:none}
.result{margin-top:18px}
.result a{display:inline-block;margin:6px 10px 0 0;background:var(--ok);color:#fff;padding:10px 16px;border-radius:11px;text-decoration:none;font-size:14px;font-weight:600;transition:.15s}
.result a:hover{filter:brightness(1.06);transform:translateY(-1px)}
.result .meta{color:var(--sub);font-size:13.5px;margin:10px 0}
.pro-lock{text-align:center;padding:36px 20px;color:var(--sub)}
.pro-lock .big{font-size:46px;margin-bottom:10px}

/* ---------------- 广告位 ---------------- */
.ad-slot{margin:0;padding:16px;border:1px dashed var(--line);border-radius:14px;background:var(--card);text-align:center;color:var(--sub);font-size:13px;min-height:70px;display:none;flex-direction:column;align-items:center;justify-content:center}
.btn.gift{background:linear-gradient(135deg,#f59e0b,#ef4444);color:#fff;border:none;font-weight:700;width:100%;margin:4px 0 2px}
.btn.gift:hover{filter:brightness(1.05)}
.gift-note{font-size:12px;color:var(--sub);text-align:center;margin:0 0 8px}
.ad-label{display:inline-block;background:var(--bg2);color:var(--sub2);font-size:11px;padding:2px 9px;border-radius:6px;margin-bottom:8px;letter-spacing:1px}

/* ---------------- 扫描 ---------------- */
.scan-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.scan-actions select{padding:9px 11px;border:1px solid var(--line);border-radius:11px;background:var(--card);font-family:inherit;color:var(--ink)}
.scan-video,.scan-canvas{max-width:100%;border-radius:12px;margin-top:14px;display:none;background:#000;box-shadow:var(--shadow-sm)}
.scan-video.show,.scan-canvas.show{display:block;animation:pop .3s ease}

/* ---------------- 二维码输出 ---------------- */
.qr-out{margin-top:16px;text-align:center}

/* ---------------- 弹窗 ---------------- */
.modal{position:fixed;inset:0;background:rgba(10,15,31,.55);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;z-index:60;padding:18px}
.modal.show{display:flex;animation:pop .25s ease}
.modal-card{background:var(--card);border-radius:22px;padding:30px;max-width:440px;width:100%;position:relative;box-shadow:var(--shadow-lg);max-height:92vh;overflow:auto}
.modal-card h3{font-size:22px;margin-bottom:8px;font-weight:800}
.modal-card .close{position:absolute;top:14px;right:18px;border:none;background:none;font-size:26px;cursor:pointer;color:var(--sub);line-height:1}
.modal-card .close:hover{color:var(--ink)}
.price{font-size:30px;font-weight:850;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px}
.price small{font-size:15px;color:var(--sub);font-weight:500;-webkit-text-fill-color:var(--sub)}
.perks{list-style:none;margin:12px 0 18px;font-size:14px}
.perks li{padding:5px 0;display:flex;gap:9px}
.perks li .ck{color:var(--ok);font-weight:800}
.qr-box{text-align:center;padding:10px 0}
.qr-box #wxQr{width:190px;height:190px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:14px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.pay-note{font-size:12.5px;color:var(--sub);margin-top:14px;line-height:1.8}
.pay-note span{color:var(--brand);font-weight:700}
.activate-inline{display:flex;gap:8px;margin-top:14px}
.activate-inline input{flex:1;padding:11px 13px;border:1px solid var(--line);border-radius:11px;font-family:inherit}
.modal-card input[type=text]{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:11px;margin:12px 0;font-size:14px;font-family:inherit;background:var(--card);color:var(--ink)}
.hint{font-size:13.5px;margin-top:10px}
.hint.ok{color:var(--ok)} .hint.err{color:var(--err)}

/* ---------------- Toast ---------------- */
.toast{position:fixed;bottom:34px;left:50%;transform:translateX(-50%) translateY(24px);background:#0f172a;color:#fff;padding:13px 22px;border-radius:12px;font-size:14px;opacity:0;pointer-events:none;transition:.28s cubic-bezier(.2,.7,.2,1);z-index:99;box-shadow:var(--shadow-lg);max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
[data-theme="dark"] .toast{background:#1e293b;border:1px solid var(--line)}

/* ---------------- 页脚 ---------------- */
.foot{margin-top:40px;border-top:1px solid var(--line);background:var(--card2);padding:46px 22px 36px}
.foot-in{max-width:1120px;margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.foot .brand{margin-bottom:14px}
.foot p.about{color:var(--sub);font-size:14px;max-width:280px}
.foot h4{font-size:14px;font-weight:700;margin-bottom:14px}
.foot ul{list-style:none}
.foot ul li{margin:9px 0}
.foot ul a{color:var(--sub);text-decoration:none;font-size:14px;transition:.15s}
.foot ul a:hover{color:var(--brand)}
.foot-bottom{text-align:center;color:var(--sub2);font-size:13px;margin-top:34px;padding-top:22px;border-top:1px solid var(--line)}

/* ---------------- 响应式 ---------------- */
@media(max-width:980px){
  .stats{grid-template-columns:repeat(2,1fr)}
  .steps,.price-grid,.reviews,.dl-grid{grid-template-columns:1fr}
  .plan.featured{transform:none}
  .ws-grid{grid-template-columns:1fr}
  .ws-side{position:static;display:flex;gap:8px;overflow:auto;max-height:none}
  .ws-side .grp{display:none}
  .tab{width:auto;white-space:nowrap;margin-bottom:0;flex-direction:column;gap:3px;padding:8px 12px;font-size:12px}
  .tab .ti{font-size:18px}
  .pro-pill{margin-left:0}
  .foot-in{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .nav{display:none}
  .stats{grid-template-columns:repeat(2,1fr)}
  .hero{padding:56px 18px 48px}
  .topbar{padding:0 16px}
  .brand small{display:none}
  .foot-in{grid-template-columns:1fr}
}