/* 扶摇AI知识笔记 —— 科技风样式表 */
:root{
  --bg:#05070f; --bg-2:#080c18; --panel:#0b1122; --panel-2:#0e1428;
  --line:rgba(124,108,255,.16); --line-2:rgba(255,255,255,.07);
  --tx:#e8ecf6; --tx-2:#a9b4cc; --tx-3:#6f7d99;
  --accent:#7c6cff; --accent-2:#22d3ee; --accent-3:#ff7ac6;
  --ok:#34d399; --warn:#fbbf24;
  --r:16px; --r-sm:10px; --max:1240px;
  --grad:linear-gradient(120deg,#7c6cff,#4f8cff 45%,#22d3ee);
  --shadow:0 18px 50px -24px rgba(0,0,0,.9);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--tx);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em;line-height:1.28}
p{margin:0 0 .7em}
code{background:var(--panel-2);padding:1px 6px;border-radius:6px;font-size:.86em;color:var(--accent-2)}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 22px}
.muted{color:var(--tx-3)}

/* 背景 */
.bg-grid,.bg-glow{position:fixed;inset:0;pointer-events:none;z-index:0}
.bg-grid{
  background-image:linear-gradient(rgba(124,108,255,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(124,108,255,.055) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 30%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse 90% 60% at 50% 0%,#000 30%,transparent 78%);
}
.bg-glow{
  background:
    radial-gradient(48rem 30rem at 12% -8%,rgba(124,108,255,.20),transparent 62%),
    radial-gradient(42rem 26rem at 88% 4%,rgba(34,211,238,.14),transparent 60%),
    radial-gradient(36rem 24rem at 50% 108%,rgba(255,122,198,.10),transparent 65%);
}
main,header,footer,section{position:relative;z-index:1}
body>*{position:relative;z-index:1}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:999px;border:1px solid transparent;
  font-size:14px;font-weight:600;cursor:pointer;transition:.22s;white-space:nowrap;
}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px -12px rgba(124,108,255,.9)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px -12px rgba(124,108,255,1)}
.btn-ghost{border-color:var(--line);background:rgba(255,255,255,.02);color:var(--tx-2)}
.btn-ghost:hover{border-color:rgba(124,108,255,.5);color:#fff;background:rgba(124,108,255,.09)}
.btn-sm{padding:8px 15px;font-size:13px}
.btn-lg{padding:14px 28px;font-size:15px}
.btn-block{width:100%;margin-top:6px}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* 顶栏 */
.site-head{position:sticky;top:0;z-index:60;backdrop-filter:blur(16px);background:rgba(5,7,15,.78);border-bottom:1px solid var(--line-2)}
.head-in{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:11px;flex:0 0 auto}
.logo{width:36px;height:36px;flex:0 0 auto}
.brand-tx{display:flex;flex-direction:column;line-height:1.15}
.brand-tx b{font-size:16px;letter-spacing:.02em}
.brand-tx i{font-style:normal;font-size:11px;color:var(--tx-3);letter-spacing:.08em}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{padding:8px 13px;border-radius:9px;font-size:14px;color:var(--tx-2);transition:.2s}
.nav a:hover{color:#fff;background:rgba(255,255,255,.045)}
.nav a.on{color:#fff;background:rgba(124,108,255,.15);box-shadow:inset 0 0 0 1px rgba(124,108,255,.3)}
.head-act{display:flex;align-items:center;gap:9px;flex:0 0 auto}
.burger{display:none;background:none;border:1px solid var(--line);color:var(--tx);border-radius:9px;padding:6px 11px;font-size:17px;cursor:pointer}

/* 通用区块 */
.sec{padding:74px 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:22px;margin-bottom:30px}
.sec-head.center{display:block;text-align:center;margin-bottom:40px}
.sec-head h2{font-size:clamp(22px,2.5vw,30px)}
.sec-sub{color:var(--tx-2);font-size:14px;margin:8px 0 0;max-width:660px}
.sec-head.center .sec-sub{margin-left:auto;margin-right:auto}
.eyebrow{font-size:11px;letter-spacing:.22em;color:var(--accent-2);font-weight:700;margin-bottom:10px;text-transform:uppercase}
.more{color:var(--tx-2);font-size:13.5px;display:inline-flex;align-items:center;gap:6px;white-space:nowrap;transition:.2s}
.more svg{width:15px;height:15px}
.more:hover{color:var(--accent-2)}
.grid{display:grid;gap:18px}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* Hero */
.hero{padding:70px 0 56px;border-bottom:1px solid var(--line-2)}
.hero-in{display:grid;grid-template-columns:1.35fr .85fr;gap:46px;align-items:center}
.hero h1{font-size:clamp(30px,4.1vw,52px);line-height:1.16;margin-bottom:18px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{color:var(--tx-2);font-size:15.5px;max-width:600px;margin-bottom:26px}
.hero-act{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:34px}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats b{font-size:26px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats b i{font-style:normal;font-size:16px}
.hero-stats span{font-size:12.5px;color:var(--tx-3);letter-spacing:.04em}
.hero-panel{background:linear-gradient(180deg,rgba(14,20,40,.92),rgba(9,13,26,.92));border:1px solid var(--line);border-radius:20px;padding:20px;box-shadow:var(--shadow)}
.hp-head{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--tx-2);letter-spacing:.1em;padding-bottom:13px;border-bottom:1px solid var(--line-2);margin-bottom:6px}
.live{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 0 rgba(52,211,153,.6);animation:pulse 2s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 9px rgba(52,211,153,0)}100%{box-shadow:0 0 0 0 rgba(52,211,153,0)}}
.hp-list li a{display:flex;gap:9px;align-items:flex-start;padding:10px 4px;border-bottom:1px solid var(--line-2);transition:.2s}
.hp-list li:last-child a{border-bottom:0}
.hp-list li a:hover{background:rgba(124,108,255,.07)}
.hp-cat{flex:0 0 auto;font-size:10.5px;color:var(--c);border:1px solid color-mix(in srgb,var(--c) 40%,transparent);border-radius:6px;padding:1px 6px;margin-top:3px}
.hp-t{font-size:13.5px;color:var(--tx-2);line-height:1.5}
.hp-list li a:hover .hp-t{color:#fff}
.hp-more{display:block;text-align:center;margin-top:12px;font-size:13px;color:var(--accent-2);display:flex;align-items:center;justify-content:center;gap:6px}
.hp-more svg{width:14px;height:14px}

/* 分类卡 */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cat-card{position:relative;display:block;padding:24px 22px;border-radius:var(--r);border:1px solid var(--line);background:linear-gradient(160deg,rgba(14,20,40,.75),rgba(8,12,24,.6));transition:.25s;overflow:hidden}
.cat-card::after{content:"";position:absolute;inset:0;background:radial-gradient(20rem 12rem at 100% 0%,color-mix(in srgb,var(--c) 22%,transparent),transparent 70%);opacity:.5;transition:.25s}
.cat-card:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--c) 55%,transparent);box-shadow:0 20px 46px -26px var(--c)}
.cat-card:hover::after{opacity:1}
.cat-ic{display:inline-flex;width:42px;height:42px;align-items:center;justify-content:center;border-radius:12px;background:color-mix(in srgb,var(--c) 16%,transparent);border:1px solid color-mix(in srgb,var(--c) 34%,transparent);color:var(--c);margin-bottom:14px}
.cat-ic svg{width:22px;height:22px}
.cat-card b{display:block;font-size:17px;margin-bottom:7px}
.cat-card i{display:block;font-style:normal;font-size:13px;color:var(--tx-2);line-height:1.6;min-height:42px}
.cat-card em{display:block;font-style:normal;font-size:12px;color:var(--tx-3);margin-top:10px}
.cat-go{position:absolute;right:18px;bottom:18px;color:var(--c);opacity:.55;transition:.25s}
.cat-go svg{width:18px;height:18px}
.cat-card:hover .cat-go{opacity:1;transform:translateX(3px)}

/* 文章卡 */
.card{border-radius:var(--r);border:1px solid var(--line-2);background:var(--panel);overflow:hidden;transition:.25s}
.card:hover{border-color:rgba(124,108,255,.42);transform:translateY(-3px);box-shadow:0 20px 44px -26px rgba(124,108,255,.75)}
.card-link{display:block;height:100%}
.cover{position:relative;height:104px;background:linear-gradient(135deg,hsl(var(--h) 72% 22%),hsl(var(--h2) 68% 13%));display:flex;align-items:center;justify-content:center;overflow:hidden}
.cover::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:22px 22px;opacity:.6}
.cover-ic{color:rgba(255,255,255,.9);opacity:.9}
.cover-ic svg{width:34px;height:34px}
.cover-badge{position:absolute;left:10px;bottom:9px;z-index:2;font-size:10.5px;padding:2px 8px;border-radius:999px;background:rgba(5,7,15,.68);border:1px solid rgba(255,255,255,.14);color:#dfe6f5;backdrop-filter:blur(4px)}
.cover-big{height:190px}
.cover-big .cover-ic svg{width:56px;height:56px}
.card-bd{padding:16px 16px 18px}
.card-meta{display:flex;align-items:center;gap:7px;flex-wrap:wrap;font-size:11.5px;color:var(--tx-3);margin-bottom:9px}
.chip{font-size:11.5px;padding:2px 9px;border-radius:999px;color:var(--c,#7c6cff);background:color-mix(in srgb,var(--c,#7c6cff) 13%,transparent);border:1px solid color-mix(in srgb,var(--c,#7c6cff) 32%,transparent)}
.dot{width:3px;height:3px;border-radius:50%;background:var(--tx-3);opacity:.6}
.card-t{font-size:15px;line-height:1.5;margin-bottom:9px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:45px}
.card:hover .card-t{color:#fff}
.card-s{font-size:13px;color:var(--tx-2);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin:0 0 12px;min-height:42px}
.card-tags{display:flex;gap:6px;flex-wrap:wrap}
.tag{font-size:11px;color:var(--tx-3);border:1px solid var(--line-2);border-radius:6px;padding:1px 7px}

/* 定价 */
.plans{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.plans-compact{grid-template-columns:repeat(4,1fr)}
.plan{position:relative;background:var(--panel);border:1px solid var(--line-2);border-radius:18px;padding:26px 22px;display:flex;flex-direction:column;transition:.25s}
.plan:hover{border-color:rgba(124,108,255,.4);transform:translateY(-3px)}
.plan.hot{border-color:rgba(124,108,255,.6);background:linear-gradient(180deg,rgba(124,108,255,.13),var(--panel) 60%);box-shadow:0 24px 60px -34px rgba(124,108,255,1)}
.ribbon{position:absolute;top:-11px;left:50%;transform:translateX(-50%);font-size:11px;padding:3px 12px;border-radius:999px;background:var(--grad);color:#fff;font-weight:700;white-space:nowrap}
.plan-h{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:14px}
.plan-h b{font-size:16px}
.plan-quota{font-size:10.5px;color:var(--accent-2);border:1px solid rgba(34,211,238,.3);border-radius:999px;padding:2px 9px;white-space:nowrap}
.plan-price{display:flex;align-items:baseline;gap:4px}
.plan-price i{font-style:normal;font-size:17px;color:var(--tx-2)}
.plan-price b{font-size:38px;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.plan-price span{font-size:12.5px;color:var(--tx-3)}
.plan-period{font-size:12px;color:var(--tx-3);margin:5px 0 12px}
.plan-desc{font-size:12.8px;color:var(--tx-2);line-height:1.65;min-height:60px;margin-bottom:14px}
.plan-feats{display:flex;flex-direction:column;gap:9px;margin-bottom:20px;flex:1}
.plan-feats li{display:flex;gap:8px;font-size:13px;color:var(--tx-2);line-height:1.55}
.plan-feats svg{width:15px;height:15px;flex:0 0 auto;margin-top:4px;color:var(--ok)}
.pricing-foot{text-align:center;color:var(--tx-3);font-size:13.5px;margin-top:26px}
.pricing-foot a{color:var(--accent-2)}
.sec-pricing{background:linear-gradient(180deg,transparent,rgba(124,108,255,.05),transparent)}

/* 对比表 */
.table-wrap{overflow-x:auto;border:1px solid var(--line-2);border-radius:var(--r);background:var(--panel)}
table.cmp{width:100%;border-collapse:collapse;min-width:680px;font-size:13.5px}
table.cmp th,table.cmp td{padding:14px 16px;text-align:center;border-bottom:1px solid var(--line-2)}
table.cmp th:first-child,table.cmp td:first-child{text-align:left;color:var(--tx-2)}
table.cmp thead th{background:rgba(124,108,255,.07);font-size:13px;color:#fff;line-height:1.5}
table.cmp thead th i{display:block;font-style:normal;font-size:11.5px;color:var(--accent-2);margin-top:3px}
table.cmp tbody tr:hover{background:rgba(255,255,255,.02)}
table.cmp tbody tr:last-child td{border-bottom:0}
table.orders{min-width:560px}
table.orders td{font-size:13px}

/* 首页四宫格说明 */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.why{padding:24px 22px;border-radius:var(--r);border:1px solid var(--line-2);background:var(--panel)}
.why-ic{display:inline-flex;width:40px;height:40px;align-items:center;justify-content:center;border-radius:11px;background:rgba(124,108,255,.12);color:var(--accent-2);margin-bottom:13px}
.why-ic svg{width:21px;height:21px}
.why b{display:block;font-size:15.5px;margin-bottom:8px}
.why p{font-size:13.2px;color:var(--tx-2);margin:0;line-height:1.68}

/* 内页头 */
.page-head{padding:52px 0 30px;border-bottom:1px solid var(--line-2);background:linear-gradient(180deg,rgba(124,108,255,.07),transparent)}
.page-head h1{font-size:clamp(24px,3vw,36px);margin-bottom:10px}
.page-head p{color:var(--tx-2);max-width:720px;margin:0}
.crumb{font-size:12.5px;color:var(--tx-3);margin-bottom:14px}
.crumb a:hover{color:var(--accent-2)}
.cat-title{display:flex;align-items:center;gap:16px}
.cat-ic-lg{display:inline-flex;width:54px;height:54px;flex:0 0 auto;align-items:center;justify-content:center;border-radius:15px;background:color-mix(in srgb,var(--c,#7c6cff) 15%,transparent);border:1px solid color-mix(in srgb,var(--c,#7c6cff) 35%,transparent);color:var(--c,#7c6cff)}
.cat-ic-lg svg{width:27px;height:27px}
.page-stat{margin-top:14px;font-size:13px;color:var(--tx-3)}
.page-stat b{color:var(--accent-2)}
.pills{display:flex;gap:9px;flex-wrap:wrap;margin-top:16px}
.pill{font-size:12.5px;padding:6px 14px;border-radius:999px;border:1px solid var(--line-2);color:var(--tx-2);background:rgba(255,255,255,.02);cursor:pointer;transition:.2s}
.pill em{font-style:normal;color:var(--tx-3);font-size:11px;margin-left:3px}
.pill:hover{border-color:color-mix(in srgb,var(--c,#7c6cff) 50%,transparent);color:#fff}
.pill.on{border-color:color-mix(in srgb,var(--c,#7c6cff) 62%,transparent);color:#fff;background:color-mix(in srgb,var(--c,#7c6cff) 16%,transparent)}
.cat-src{margin-top:18px;font-size:12.5px;color:var(--tx-3)}
.sec-cat{border-top:1px solid var(--line-2)}

/* 筛选 */
.filter-bar{display:flex;flex-direction:column;gap:14px;margin-bottom:18px}
.search input{width:100%;padding:14px 18px;border-radius:14px;border:1px solid var(--line);background:var(--panel);color:var(--tx);font-size:14px;outline:none;transition:.2s}
.search input:focus{border-color:rgba(124,108,255,.6);box-shadow:0 0 0 4px rgba(124,108,255,.11)}
.filter-bar .pills{margin-top:0}
.result-line{font-size:13px;color:var(--tx-3);margin-bottom:16px}
.result-line span{color:var(--accent-2);font-weight:700}
.empty{padding:60px 0;text-align:center;color:var(--tx-3)}
.load-more{text-align:center;margin-top:30px}
.card.hide{display:none}

/* 文章详情 */
.art{padding:44px 0 20px}
.art-wrap{max-width:900px}
.art-head{margin-bottom:30px;padding-bottom:26px;border-bottom:1px solid var(--line-2)}
.art-head h1{font-size:clamp(23px,2.9vw,34px);margin:14px 0 18px;line-height:1.32}
.art-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:12.5px;color:var(--tx-3)}
.src-badge{font-size:11.5px;padding:3px 10px;border-radius:999px;border:1px solid var(--line);color:var(--accent-2);background:rgba(34,211,238,.07)}
.art-tags{display:flex;gap:6px;flex-wrap:wrap}
.blk{margin-bottom:34px}
.blk-t{display:flex;align-items:center;gap:11px;font-size:17px;margin-bottom:14px}
.blk-n{font-size:12px;font-weight:700;color:var(--accent);border:1px solid rgba(124,108,255,.35);border-radius:8px;padding:2px 8px;letter-spacing:.04em}
.lead{font-size:15.5px;color:#d5dcec;line-height:1.85;background:rgba(124,108,255,.05);border-left:2px solid rgba(124,108,255,.5);border-radius:0 12px 12px 0;padding:16px 20px}
.pts li{position:relative;padding:10px 0 10px 24px;color:var(--tx-2);font-size:14.3px;line-height:1.8;border-bottom:1px dashed var(--line-2)}
.pts li:last-child{border-bottom:0}
.pts li::before{content:"";position:absolute;left:4px;top:20px;width:7px;height:7px;border-radius:50%;background:var(--grad)}
.payblk{position:relative;border-radius:var(--r);border:1px solid var(--line);background:linear-gradient(180deg,rgba(14,20,40,.8),rgba(9,13,26,.6));padding:22px}
.payblk-inner{transition:.35s}
.art-src{margin-top:10px}
.art-foot{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:18px 0;border-top:1px solid var(--line-2);margin-top:8px}
.lock-hint{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:var(--tx-3)}
.lock-hint svg{width:15px;height:15px}
.lock-hint.ok{color:var(--ok)}
.lock-hint.warn{color:var(--warn)}
.art-foot-r{display:flex;gap:9px}

/* 付费墙 */
.paywall{margin:4px 0 24px}
.paywall-in{border:1px solid rgba(124,108,255,.42);border-radius:var(--r);background:linear-gradient(180deg,rgba(124,108,255,.15),rgba(9,13,26,.9));padding:32px 28px;text-align:center}
.pw-ic{width:52px;height:52px;margin:0 auto 14px;border-radius:15px;display:flex;align-items:center;justify-content:center;background:rgba(124,108,255,.18);color:var(--accent-2)}
.pw-ic svg{width:26px;height:26px}
.paywall-in h3{font-size:19px;margin-bottom:9px}
.paywall-in p{color:var(--tx-2);font-size:13.8px;max-width:560px;margin:0 auto 20px}
.pw-act{display:flex;gap:11px;justify-content:center;flex-wrap:wrap}
.pw-note{font-size:12.5px;color:var(--tx-3);margin:18px 0 0 !important}
.pw-note a{color:var(--accent-2)}
body.locked .payblk-inner{filter:blur(7px);opacity:.5;user-select:none;pointer-events:none}
body.locked #artBody{max-height:1120px;overflow:hidden}

/* FAQ */
.faq details{border:1px solid var(--line-2);border-radius:var(--r-sm);background:var(--panel);margin-bottom:11px;overflow:hidden}
.faq summary{padding:16px 20px;cursor:pointer;font-weight:600;font-size:14.5px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--accent-2);font-weight:700}
.faq details[open] summary::after{content:"−"}
.faq p{padding:0 20px 16px;color:var(--tx-2);font-size:13.8px;margin:0}

/* 面板 */
.panel{background:var(--panel);border:1px solid var(--line-2);border-radius:var(--r);padding:26px 24px;margin-bottom:22px}
.panel-t{font-size:16.5px;margin-bottom:18px;padding-bottom:13px;border-bottom:1px solid var(--line-2)}
.sticky{position:sticky;top:88px}

/* 付款页 */
.pay-wrap{display:grid;grid-template-columns:1.5fr 1fr;gap:24px;align-items:start}
.pay-opts{display:grid;grid-template-columns:repeat(2,1fr);gap:11px}
.pay-opt{cursor:pointer}
.pay-opt input{position:absolute;opacity:0;pointer-events:none}
.po-bd{display:block;padding:15px 16px;border-radius:13px;border:1px solid var(--line-2);background:rgba(255,255,255,.02);transition:.2s}
.po-bd b{display:block;font-size:14.5px;margin-bottom:4px}
.po-bd i{display:block;font-style:normal;font-size:12px;color:var(--tx-3)}
.po-bd em{display:block;font-style:normal;font-size:17px;font-weight:700;color:var(--accent-2);margin-top:8px}
.pay-opt input:checked+.po-bd{border-color:rgba(124,108,255,.75);background:rgba(124,108,255,.14);box-shadow:0 0 0 3px rgba(124,108,255,.1)}
.pay-single{margin-top:18px;padding-top:18px;border-top:1px solid var(--line-2)}
.lbl{display:block;font-size:13px;color:var(--tx-2);margin:14px 0 7px}
.req{color:var(--accent-3)}
input[type=text],input[type=password],input[type=search],textarea{
  width:100%;padding:12px 15px;border-radius:11px;border:1px solid var(--line);background:var(--bg-2);
  color:var(--tx);font-size:14px;font-family:inherit;outline:none;transition:.2s
}
input:focus,textarea:focus{border-color:rgba(124,108,255,.6);box-shadow:0 0 0 4px rgba(124,108,255,.1)}
.hint{font-size:12.3px;color:var(--tx-3);margin:9px 0 0}
.hint.center{text-align:center;display:block}
.agree{display:flex;align-items:center;gap:8px;font-size:12.8px;color:var(--tx-2);margin:18px 0 4px}
.agree a{color:var(--accent-2)}
.order-box{border:1px dashed var(--line);border-radius:13px;padding:16px;margin-bottom:18px}
.ob-row{display:flex;justify-content:space-between;gap:12px;font-size:13px;padding:7px 0;color:var(--tx-3)}
.ob-row b{color:var(--tx);font-weight:600;text-align:right;word-break:break-all}
.ob-price{color:var(--accent-2) !important;font-size:16px}
.qr-tabs{display:flex;gap:8px;margin-bottom:13px}
.qr-tab{flex:1;padding:9px;border-radius:10px;border:1px solid var(--line-2);background:rgba(255,255,255,.02);color:var(--tx-2);font-size:13px;cursor:pointer;transition:.2s}
.qr-tab.on{border-color:rgba(124,108,255,.6);color:#fff;background:rgba(124,108,255,.14)}
.qr-box{background:#fff;border-radius:13px;padding:16px;min-height:230px;display:flex;flex-direction:column;gap:12px;align-items:center;justify-content:center}
.qr-box img{width:200px;height:200px;object-fit:contain}
.qr-img{border:1px solid #e2e8f0;border-radius:10px;background:#fff}
.qr-tip{font-size:13px;color:#334155;margin:0;text-align:center}
.qr-tip b{color:#0ea5a5}
.qr-ph{text-align:center;color:#334155}
.qr-ic{width:46px;height:46px;margin:0 auto 10px;border-radius:13px;background:#eef2ff;display:flex;align-items:center;justify-content:center;color:#4f46e5}
.qr-ic svg{width:23px;height:23px}
.qr-ph p{font-size:13px;margin:0 0 6px}
.qr-ph .hint{color:#64748b;font-size:11.5px;line-height:1.6}
.pay-manual{margin-top:16px;padding-top:16px;border-top:1px solid var(--line-2);font-size:13px;color:var(--tx-2)}
.contact-list li{display:flex;align-items:center;gap:8px;padding:6px 0;font-size:13.5px}
.contact-list svg{width:16px;height:16px;color:var(--accent-2)}
.copyable{cursor:pointer;color:var(--accent-2);border-bottom:1px dashed rgba(34,211,238,.5)}
.pay-tips{margin-top:18px;padding-top:16px;border-top:1px solid var(--line-2)}
.pay-tips h4{font-size:13.5px;margin-bottom:9px}
.pay-tips li{font-size:12.5px;color:var(--tx-3);padding:4px 0 4px 15px;position:relative}
.pay-tips li::before{content:"";position:absolute;left:3px;top:12px;width:5px;height:5px;border-radius:50%;background:var(--tx-3)}

/* 登录 */
.auth-wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:24px;align-items:start;max-width:940px}
.panel.auth{margin:0}
.tabs{display:flex;gap:8px;margin-bottom:20px}
.tab{flex:1;padding:11px;border-radius:11px;border:1px solid var(--line-2);background:rgba(255,255,255,.02);color:var(--tx-2);font-size:14px;font-weight:600;cursor:pointer;transition:.2s}
.tab.on{border-color:rgba(124,108,255,.6);color:#fff;background:rgba(124,108,255,.14)}
.auth-side{background:var(--panel);border:1px solid var(--line-2);border-radius:var(--r);padding:26px 24px}
.auth-side h3{font-size:16px;margin-bottom:16px}
.tick li{position:relative;padding:7px 0 7px 24px;font-size:13.5px;color:var(--tx-2)}
.tick li::before{content:"✓";position:absolute;left:0;top:7px;color:var(--ok);font-weight:700}
.tick.big li{padding:11px 0 11px 26px;font-size:14px;line-height:1.75;border-bottom:1px dashed var(--line-2)}
.tick.big li:last-child{border-bottom:0}
.tick.big b{color:#fff}

/* 会员中心 */
.member-wrap{display:grid;gap:22px}
.mc-top{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:22px;flex-wrap:wrap}
.mc-user{display:flex;align-items:center;gap:13px}
.mc-av{width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;background:rgba(124,108,255,.14);color:var(--accent-2)}
.mc-av svg{width:23px;height:23px}
.mc-user b{display:block;font-size:16px}
.mc-user i{font-style:normal;font-size:12.5px;color:var(--tx-3)}
.plan-badge{font-size:12.5px;padding:5px 14px;border-radius:999px;border:1px solid rgba(34,211,238,.35);color:var(--accent-2);background:rgba(34,211,238,.08)}
.mc-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}
.mc-stats div{background:var(--bg-2);border:1px solid var(--line-2);border-radius:12px;padding:14px;text-align:center}
.mc-stats b{display:block;font-size:21px;color:#fff}
.mc-stats span{font-size:11.8px;color:var(--tx-3)}
.bar{height:7px;border-radius:999px;background:rgba(255,255,255,.06);overflow:hidden;margin-bottom:20px}
.bar i{display:block;height:100%;background:var(--grad);transition:.5s}
.mc-act{display:flex;gap:11px;flex-wrap:wrap}

/* 关于 */
.about-wrap{display:grid;grid-template-columns:1.55fr .8fr;gap:24px;align-items:start}
.about-main p{color:var(--tx-2);font-size:14.3px}
.steps li{position:relative;padding:10px 0 10px 34px;color:var(--tx-2);font-size:14px;counter-increment:st}
.steps{counter-reset:st}
.steps li::before{content:counter(st);position:absolute;left:0;top:11px;width:22px;height:22px;border-radius:7px;background:rgba(124,108,255,.16);border:1px solid rgba(124,108,255,.35);color:var(--accent-2);font-size:11.5px;font-weight:700;display:flex;align-items:center;justify-content:center}
.steps b{color:#fff}
.kv{display:flex;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line-2);font-size:13.5px;color:var(--tx-3)}
.kv b{color:var(--tx)}
.kv:last-of-type{margin-bottom:16px}

/* 联系 */
.contact-wrap{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:start}
.contact-cards{display:grid;gap:12px;margin-bottom:22px}
.cc{display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;gap:2px 14px;padding:18px;border-radius:14px;border:1px solid var(--line-2);background:var(--bg-2);transition:.22s}
.cc:hover{border-color:rgba(124,108,255,.5);background:rgba(124,108,255,.08);transform:translateX(3px)}
.cc-ic{grid-row:1/3;width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:rgba(124,108,255,.14);color:var(--accent-2)}
.cc-ic svg{width:22px;height:22px}
.cc b{font-size:13px;color:var(--tx-3);font-weight:600}
.cc em{font-style:normal;font-size:17px;font-weight:700;letter-spacing:.02em}
.cc i{grid-column:2;font-style:normal;font-size:11.5px;color:var(--tx-3)}
.form{display:flex;flex-direction:column}

/* 404 */
.err{padding:110px 0}
.err-in{text-align:center}
.err-code{font-size:clamp(72px,14vw,140px);font-weight:800;line-height:1;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;opacity:.85}
.err-in h1{font-size:clamp(21px,3vw,30px);margin:14px 0 12px}
.err-in p{color:var(--tx-2);margin-bottom:26px}
.err-act{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* 提示条 */
.notice{position:fixed;left:50%;bottom:26px;transform:translateX(-50%);z-index:200;width:min(94vw,520px)}
.notice-in{display:flex;align-items:center;gap:11px;padding:13px 16px;border-radius:13px;border:1px solid rgba(124,108,255,.45);background:rgba(11,17,34,.97);box-shadow:0 20px 50px -20px rgba(0,0,0,.95);font-size:13.5px;backdrop-filter:blur(10px)}
.notice-in b{color:var(--accent-2);flex:0 0 auto;font-size:13px}
.notice-in span{flex:1;color:var(--tx-2)}
.notice-in button{background:none;border:0;color:var(--tx-3);font-size:19px;cursor:pointer;line-height:1}
.notice.ok .notice-in{border-color:rgba(52,211,153,.5)}
.notice.ok .notice-in b{color:var(--ok)}
.notice.err .notice-in{border-color:rgba(255,122,198,.5)}
.notice.err .notice-in b{color:var(--accent-3)}

/* 页脚 */
.site-foot{border-top:1px solid var(--line-2);background:linear-gradient(180deg,transparent,rgba(124,108,255,.05));padding:56px 0 26px;margin-top:40px}
.foot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.3fr;gap:34px;padding-bottom:32px;border-bottom:1px solid var(--line-2)}
.foot-desc{font-size:13.2px;color:var(--tx-3);margin:14px 0 0;max-width:360px;line-height:1.75}
.site-foot h4{font-size:13.5px;margin-bottom:14px;color:#fff}
.site-foot ul li{padding:5px 0}
.site-foot ul li a{font-size:13.2px;color:var(--tx-3);transition:.2s}
.site-foot ul li a:hover{color:var(--accent-2)}
.foot-contact li{display:flex;align-items:center;gap:9px;color:var(--tx-3);font-size:13.2px;padding:5px 0}
.foot-contact svg{width:16px;height:16px;color:var(--accent-2);flex:0 0 auto}
.foot-contact b{color:var(--tx)}
.foot-bottom{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;padding-top:22px;font-size:12.3px;color:var(--tx-3)}
.foot-bottom a{color:var(--tx-3)}
.foot-bottom a:hover{color:var(--accent-2)}

/* 回到顶部 */
.to-top{position:fixed;right:22px;bottom:26px;z-index:120;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:rgba(11,17,34,.9);color:var(--tx-2);font-size:17px;cursor:pointer;opacity:0;pointer-events:none;transition:.25s;backdrop-filter:blur(8px)}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{border-color:rgba(124,108,255,.6);color:#fff}

/* 响应式 */
@media (max-width:1080px){
  .grid-4{grid-template-columns:repeat(3,1fr)}
  .plans,.plans-compact{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .hero-in{grid-template-columns:1fr;gap:34px}
  .pay-wrap,.auth-wrap,.about-wrap,.contact-wrap{grid-template-columns:1fr}
  .sticky{position:static}
  .foot-grid{grid-template-columns:1fr 1fr}
  .why-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:820px){
  .nav{position:fixed;top:68px;left:0;right:0;flex-direction:column;background:rgba(5,7,15,.98);border-bottom:1px solid var(--line);padding:14px 20px;gap:4px;display:none;backdrop-filter:blur(14px)}
  .nav.open{display:flex}
  .nav a{padding:12px 14px;font-size:15px}
  .burger{display:block}
  .head-act .btn span{display:none}
}
@media (max-width:700px){
  .sec{padding:52px 0}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .plans,.plans-compact{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr}
  .pay-opts{grid-template-columns:1fr}
  .why-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .mc-stats{grid-template-columns:repeat(2,1fr)}
  .hero-stats{gap:22px}
  .hero{padding:44px 0 40px}
  .card-s{display:none}
  .cover{height:88px}
}
@media (max-width:460px){
  .grid-4{grid-template-columns:1fr}
  .sec-head{flex-direction:column;align-items:flex-start}
}

/* 转载声明 + 正文全文 */
.reprint{display:flex;gap:14px;padding:16px 18px;border-radius:var(--r);border:1px solid rgba(251,191,36,.3);background:rgba(251,191,36,.06);margin-bottom:28px}
.rp-tag{flex:0 0 auto;font-size:11.5px;font-weight:700;color:var(--warn);border:1px solid rgba(251,191,36,.45);border-radius:7px;padding:2px 9px;height:22px;line-height:17px}
.rp-tx p{font-size:13px;color:var(--tx-2);margin:0 0 6px;line-height:1.7}
.rp-tx p:last-child{margin:0}
.rp-link a{color:var(--accent-2);word-break:break-all;font-size:12.3px}
.art-content{font-size:15.3px;line-height:1.95;color:#dbe2f0}
.art-content p{margin:0 0 1.15em}
.art-content h3{font-size:17px;color:#fff;margin:1.7em 0 .7em;padding-left:12px;border-left:3px solid var(--accent);line-height:1.5}
.art-content h3:first-child{margin-top:0}
.art-content blockquote{border-left:2px solid var(--line);padding-left:14px;color:var(--tx-2);margin:1em 0}
.blk-content{border-top:1px solid var(--line-2);padding-top:28px}
body.locked .blk-content{position:relative}
body.locked .blk-content::after{content:"";position:absolute;left:0;right:0;bottom:0;height:180px;background:linear-gradient(180deg,transparent,var(--bg) 88%)}

/* ── 程序生成插画 ─────────────────────────────────── */
.cover{background:#080c18}
.cover-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s cubic-bezier(.22,1,.36,1)}
.card:hover .cover-img{transform:scale(1.055)}
.cover-badge{z-index:2}
.cover-big{height:268px}

.hero{position:relative;overflow:hidden}
.hero-art{position:absolute;top:50%;right:-8%;width:min(760px,62vw);transform:translateY(-50%);opacity:.5;pointer-events:none;mask-image:radial-gradient(closest-side,#000 62%,transparent)}
.hero-art img{width:100%;height:auto;display:block}
.hero-in{position:relative;z-index:1}
@media (max-width:960px){.hero-art{right:-24%;width:118vw;opacity:.32}}

.cat-card{position:relative}
.cat-bg{position:absolute;inset:0;overflow:hidden;border-radius:inherit;opacity:.42;transition:opacity .25s}
.cat-bg img{width:100%;height:100%;object-fit:cover;display:block}
.cat-card:hover .cat-bg{opacity:.72}
.cat-card>*:not(.cat-bg){position:relative;z-index:1}

.page-head-art{position:relative;overflow:hidden}
.ph-art{position:absolute;inset:0;opacity:.38;pointer-events:none;mask-image:linear-gradient(90deg,#000,transparent 78%)}
.ph-art img{width:100%;height:100%;object-fit:cover;display:block}
.page-head-art .wrap{position:relative;z-index:1}

.art-figure{margin:0 0 26px;border-radius:16px;overflow:hidden;border:1px solid var(--line)}
.art-figure .cover{border-radius:0}
.art-figure .cover-badge{display:none}

.pay-art{position:relative;margin-bottom:16px;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#070a14}
.pay-art img{width:100%;height:auto;display:block;opacity:.9}
.pay-right .panel.sticky{top:14px}