/* ============ fengyun-publish · 深色科技 + 陶土橙(Claude/风云主品牌色) ============ */
:root{
  --bg:#08090d;
  --bg-2:#0c0e13;
  --panel:#13151c;
  --panel-2:#181b24;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --txt:#eef0f5;
  --txt-dim:#9aa0ad;
  --txt-faint:#5f6675;
  --accent:#D97757;            /* 陶土橙 · 风云/Claude 主品牌色 */
  --accent-d:#c25f3f;
  --accent-soft:rgba(217,119,87,.13);
  --honey:#F08C2E;             /* 蜜橘橙 · 高光/辉光 */
  --cyan:#23d3c5;              /* 数据/反馈 副色 */
  --ok:#3fb98c;
  --maxw:1180px;
  --radius:18px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--txt);overflow-x:hidden;
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,-apple-system,sans-serif;
  line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
code,.mono{font-family:"SF Mono",ui-monospace,"Cascadia Code","Consolas",monospace}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.accent{color:var(--accent)}
.cyan{color:var(--cyan)}
.honey{color:var(--honey)}
.glow-text{text-shadow:0 0 26px rgba(217,119,87,.55)}

/* 背景星点光晕 */
body::before{content:"";position:fixed;inset:0;z-index:-2;background:
  radial-gradient(900px 520px at 80% -5%,rgba(217,119,87,.12),transparent 60%),
  radial-gradient(700px 500px at 8% 8%,rgba(35,211,197,.06),transparent 60%);pointer-events:none}
body::after{content:"";position:fixed;inset:0;z-index:-1;opacity:.4;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);background-size:42px 42px}

/* ===================== 顶栏 ===================== */
header{position:sticky;top:0;z-index:80;backdrop-filter:blur(16px);background:rgba(8,9,13,.72);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:11px;font-weight:800;font-size:18px;letter-spacing:.2px}
.logo .mark{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--accent),#ffb259);
  display:flex;align-items:center;justify-content:center;font-size:17px;color:#1a1206;box-shadow:0 0 18px rgba(217,119,87,.5)}
.logo small{font-weight:500;color:var(--txt-faint);font-size:12px;margin-left:2px}
.logo .mono{font-family:"SF Mono",ui-monospace,monospace}
.nav-links{display:flex;gap:30px;font-size:15px;color:var(--txt-dim)}
.nav-links a{position:relative;transition:.2s}
.nav-links a:hover{color:var(--txt)}
.nav-cta{display:inline-flex;align-items:center;gap:7px;padding:9px 17px;border-radius:999px;background:var(--accent);color:#1a1206;font-weight:700;font-size:14px;transition:.2s;border:none;cursor:pointer}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(217,119,87,.4)}
@media(max-width:880px){.nav-links{display:none}}

/* ===================== 通用按钮 / 区块 ===================== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;cursor:pointer;border:1px solid transparent;background:transparent;transition:.2s;font-family:inherit}
.btn-primary{background:var(--accent);color:#1a1206}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(217,119,87,.36)}
.btn-ghost{border-color:var(--line-2);color:var(--txt)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent)}
.block{padding:92px 0}
.kicker{font-size:13px;letter-spacing:4px;color:var(--accent);text-transform:uppercase;font-weight:700}
.sec-title{font-size:clamp(26px,4vw,40px);font-weight:800;margin-top:12px;letter-spacing:-.5px}
.sec-desc{color:var(--txt-dim);margin-top:14px;max-width:680px;font-size:16.5px}
.sec-head{margin-bottom:46px}

/* ===================== Hero ===================== */
.hero{position:relative;padding:78px 0 36px;text-align:center}
.badge{display:inline-flex;align-items:center;gap:9px;font-size:13px;color:var(--accent);background:var(--accent-soft);
  border:1px solid rgba(217,119,87,.3);padding:7px 16px;border-radius:999px;margin-bottom:26px}
.badge .live{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 8px var(--accent);animation:pulse 1.5s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.4;transform:scale(.65)}}
.hero h1{font-size:clamp(34px,6.6vw,68px);font-weight:900;line-height:1.1;letter-spacing:-1px}
.hero h1 .mono{font-family:"SF Mono",ui-monospace,"Cascadia Code",monospace;letter-spacing:-2px}
.hero .lede{margin:26px auto 0;max-width:700px;font-size:clamp(16px,2.2vw,20px);color:var(--txt-dim)}
.hero .lede b{color:var(--txt)}
.hero-actions{display:flex;gap:14px;justify-content:center;margin-top:36px;flex-wrap:wrap}
.hero-sub{margin-top:18px;font-size:13.5px;color:var(--txt-faint)}
.hero-sub code{color:var(--accent);background:var(--accent-soft);padding:2px 8px;border-radius:6px}

/* 终端窗口装饰 */
.terminal{max-width:760px;margin:48px auto 0;background:var(--panel);border:1px solid var(--line-2);border-radius:14px;
  overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.55);text-align:left}
.terminal .bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:var(--panel-2);border-bottom:1px solid var(--line)}
.terminal .bar i{width:11px;height:11px;border-radius:50%;background:#3a3d46}
.terminal .bar i:nth-child(1){background:#ff5f57}.terminal .bar i:nth-child(2){background:#febc2e}.terminal .bar i:nth-child(3){background:#28c840}
.terminal .bar span{margin-left:8px;font-size:12.5px;color:var(--txt-faint)}
.terminal .body{padding:20px 22px;font-family:"SF Mono",ui-monospace,monospace;font-size:13.5px;line-height:1.9}
.terminal .body .p{color:var(--accent)}
.terminal .body .u{color:var(--txt)}
.terminal .body .c{color:var(--txt-faint)}
.terminal .body .ok{color:var(--ok)}
.terminal .body .step{color:var(--cyan)}
.cursor{display:inline-block;width:8px;height:16px;background:var(--accent);vertical-align:-2px;margin-left:2px;animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* ===================== 统计条 ===================== */
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin-top:8px}
@media(max-width:780px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px 18px;text-align:center}
.stat .v{font-size:30px;font-weight:900;color:var(--accent);font-family:"SF Mono",monospace;letter-spacing:-1px}
.stat .l{font-size:13px;color:var(--txt-dim);margin-top:6px}

/* ===================== 这是什么 / 概述卡片 ===================== */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:860px){.grid3{grid-template-columns:1fr}}
.ocard{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s;position:relative;overflow:hidden}
.ocard::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent),transparent)}
.ocard:hover{transform:translateY(-5px);border-color:rgba(217,119,87,.4);background:var(--panel-2)}
.ocard .ic{font-size:26px;margin-bottom:14px}
.ocard h3{font-size:19px;font-weight:700}
.ocard p{color:var(--txt-dim);font-size:14.5px;margin-top:10px}

/* ===================== Harness 高亮区 ===================== */
.harness-band{background:
  radial-gradient(700px 400px at 50% 0%,rgba(217,119,87,.10),transparent 60%),
  linear-gradient(180deg,var(--bg-2),var(--bg));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.harness-loop{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
@media(max-width:900px){.harness-loop{grid-template-columns:1fr;gap:36px}}
.loop-ring{position:relative;width:100%;max-width:420px;aspect-ratio:1;margin:0 auto}
.loop-ring .ring{position:absolute;inset:0;border-radius:50%;border:1.5px dashed rgba(217,119,87,.3);animation:spin 26s linear infinite}
.loop-ring .ring.r2{inset:42px;border-color:rgba(35,211,197,.22);animation-direction:reverse;animation-duration:34s}
@keyframes spin{to{transform:rotate(360deg)}}
.loop-ring .hub{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:138px;height:138px;border-radius:50%;
  background:radial-gradient(circle at 50% 38%,#2a1d0c,#0c0e13 72%);border:1px solid rgba(217,119,87,.4);
  display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;
  box-shadow:0 0 60px rgba(217,119,87,.32),inset 0 0 30px rgba(217,119,87,.08)}
.loop-ring .hub b{font-size:17px;color:var(--accent);font-weight:800}
.loop-ring .hub span{font-size:11px;color:var(--txt-dim);margin-top:4px;letter-spacing:.5px}
.loop-node{position:absolute;width:96px;text-align:center;font-size:12px;color:var(--txt-dim);transform:translate(-50%,-50%)}
.loop-node .dot{width:40px;height:40px;margin:0 auto 7px;border-radius:11px;background:var(--panel);border:1px solid var(--line-2);
  display:flex;align-items:center;justify-content:center;font-size:18px;box-shadow:0 8px 22px rgba(0,0,0,.5)}
.loop-node b{display:block;color:var(--txt);font-size:13px}
.harness-copy h2{font-size:clamp(24px,3.4vw,34px);font-weight:800;letter-spacing:-.5px;line-height:1.2}
.harness-copy .lead{color:var(--txt-dim);margin-top:16px;font-size:16px}
.harness-copy ul{list-style:none;margin-top:22px;display:flex;flex-direction:column;gap:14px}
.harness-copy li{display:flex;gap:13px;font-size:14.5px;color:var(--txt-dim)}
.harness-copy li .hi{flex-shrink:0;width:26px;height:26px;border-radius:8px;background:var(--accent-soft);color:var(--accent);
  display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:800;margin-top:1px}
.harness-copy li b{color:var(--txt)}

/* ===================== 架构图(5 Layer 栈) ===================== */
.arch{display:flex;flex-direction:column;gap:14px;position:relative}
.layer{display:grid;grid-template-columns:64px 1fr;gap:0;background:var(--panel);border:1px solid var(--line);
  border-radius:16px;overflow:hidden;transition:.25s;position:relative}
.layer:hover{border-color:rgba(217,119,87,.42);transform:translateX(4px);background:var(--panel-2)}
.layer .tag{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  background:linear-gradient(180deg,var(--accent),var(--accent-d));color:#1a1206}
.layer .tag b{font-size:24px;font-weight:900;line-height:1}
.layer .tag i{font-style:normal;font-size:10px;letter-spacing:1px;opacity:.85}
.layer.data .tag{background:linear-gradient(180deg,#2aa79b,#1d8077)}
.layer.feed .tag{background:linear-gradient(180deg,#2aa79b,#1d8077)}
.layer .body{padding:18px 22px;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap}
.layer .body .nm{font-size:17px;font-weight:800}
.layer .body .nm small{display:block;font-weight:500;color:var(--txt-dim);font-size:13px;margin-top:3px}
.layer .chips{display:flex;flex-wrap:wrap;gap:7px;max-width:640px;justify-content:flex-end}
.chip{font-size:12px;font-family:"SF Mono",monospace;color:var(--txt-dim);background:rgba(255,255,255,.04);
  border:1px solid var(--line);padding:4px 9px;border-radius:7px}
.layer .live-tag{font-size:11px;font-weight:700;color:var(--ok);border:1px solid rgba(63,185,140,.4);
  background:rgba(63,185,140,.1);padding:3px 9px;border-radius:999px;white-space:nowrap}
.arch-note{text-align:center;color:var(--txt-faint);font-size:13px;margin-top:20px}
.arch-note .mono{color:var(--accent)}

/* ===================== 19 Step 流 ===================== */
.phases{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:900px){.phases{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.phases{grid-template-columns:1fr}}
.phase{background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line);border-radius:16px;padding:22px;position:relative}
.phase .ph{font-family:"SF Mono",monospace;font-size:12px;color:var(--accent);font-weight:700;letter-spacing:1px}
.phase h4{font-size:18px;font-weight:800;margin:8px 0 14px}
.phase ol{list-style:none;display:flex;flex-direction:column;gap:9px}
.phase li{font-size:13.5px;color:var(--txt-dim);padding-left:24px;position:relative}
.phase li::before{content:attr(data-n);position:absolute;left:0;top:0;font-family:"SF Mono",monospace;font-size:11px;
  color:var(--accent);font-weight:700}
.phase li b{color:var(--txt);font-weight:600}

/* ===================== 三轨 Critic + Gate ===================== */
.critic-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:30px}
@media(max-width:860px){.critic-grid{grid-template-columns:1fr}}
.tcard{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:24px;position:relative;overflow:hidden}
.tcard .trk{font-family:"SF Mono",monospace;font-size:13px;font-weight:800}
.tcard.a .trk{color:var(--honey)}.tcard.b .trk{color:var(--accent)}.tcard.c .trk{color:var(--cyan)}
.tcard h4{font-size:18px;font-weight:800;margin:8px 0 8px}
.tcard p{font-size:14px;color:var(--txt-dim)}
.tcard .impl{margin-top:14px;font-size:12px;font-family:"SF Mono",monospace;color:var(--txt-faint);
  border-top:1px solid var(--line);padding-top:12px}
.gate-box{background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line);border-radius:16px;
  display:grid;grid-template-columns:1fr 1fr;gap:0;overflow:hidden}
@media(max-width:780px){.gate-box{grid-template-columns:1fr}}
.gate-box .gl{padding:28px;border-right:1px solid var(--line)}
@media(max-width:780px){.gate-box .gl{border-right:none;border-bottom:1px solid var(--line)}}
.gate-box h4{font-size:17px;font-weight:800;display:flex;align-items:center;gap:9px}
.gate-box h4 .ic{font-size:20px}
.gate-tree{margin-top:16px;font-family:"SF Mono",monospace;font-size:12.5px;line-height:2.1;color:var(--txt-dim);white-space:pre-wrap}
.gate-tree .ship{color:var(--ok);font-weight:700}
.gate-tree .stop{color:#ff7a6b;font-weight:700}
.gate-tree .rev{color:var(--honey)}
.gate-list{list-style:none;margin-top:16px;display:flex;flex-direction:column;gap:13px}
.gate-list li{font-size:13.5px;color:var(--txt-dim);padding-left:26px;position:relative}
.gate-list li::before{content:"●";position:absolute;left:0;color:var(--accent);font-size:11px;top:3px}
.gate-list li b{color:var(--txt)}

/* ===================== 技术亮点 ===================== */
.feat{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:860px){.feat{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.feat{grid-template-columns:1fr}}
.fcard{background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line);border-radius:16px;padding:24px}
.fcard .n{font-family:"SF Mono",monospace;font-size:13px;color:var(--accent);font-weight:700}
.fcard h4{font-size:17px;font-weight:700;margin:10px 0 8px}
.fcard p{font-size:13.5px;color:var(--txt-dim)}

/* 技术栈表 */
.stack-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:30px}
@media(max-width:860px){.stack-grid{grid-template-columns:1fr}}
.stk{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px}
.stk h5{font-size:13px;letter-spacing:2px;color:var(--txt-faint);text-transform:uppercase;margin-bottom:14px}
.stk .row{display:flex;justify-content:space-between;gap:12px;font-size:13.5px;padding:7px 0;border-bottom:1px dashed var(--line)}
.stk .row:last-child{border-bottom:none}
.stk .row .k{color:var(--txt);font-weight:600}
.stk .row .v{color:var(--txt-dim);font-family:"SF Mono",monospace;font-size:12px;text-align:right}

/* ===================== CTA / 作者 ===================== */
.cta-band{background:
  radial-gradient(600px 300px at 50% 120%,rgba(217,119,87,.16),transparent 60%),var(--bg-2);
  border-top:1px solid var(--line)}
.cta-box{text-align:center;max-width:760px;margin:0 auto}
.cta-box h2{font-size:clamp(28px,4.5vw,44px);font-weight:900;letter-spacing:-1px}
.cta-box p{color:var(--txt-dim);font-size:17px;margin-top:18px}
.cta-actions{display:flex;gap:14px;justify-content:center;margin-top:34px;flex-wrap:wrap}

.author{display:grid;grid-template-columns:1fr 1.2fr;gap:40px;align-items:center}
@media(max-width:820px){.author{grid-template-columns:1fr;gap:28px}}
.author .av{width:120px;height:120px;border-radius:24px;background:linear-gradient(135deg,var(--accent),#ffb259);
  display:flex;align-items:center;justify-content:center;font-size:40px;color:#1a1206;font-weight:900;letter-spacing:2px;
  box-shadow:0 0 50px rgba(217,119,87,.4);margin-bottom:22px}
.author h3{font-size:24px;font-weight:800}
.author .role{color:var(--accent);font-size:15px;margin-top:6px}
.author p{color:var(--txt-dim);font-size:15.5px;margin-top:16px;line-height:1.85}
.author .quote{border-left:3px solid var(--accent);padding-left:16px;margin-top:20px;color:var(--txt);font-size:15px;font-style:italic}
.contact-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:8px}
.contact-card .crow{display:flex;align-items:center;gap:16px;padding:18px 20px;border-bottom:1px solid var(--line);transition:.2s}
.contact-card .crow:last-child{border-bottom:none}
.contact-card .crow:hover{background:var(--panel-2)}
.contact-card .ci{width:44px;height:44px;border-radius:12px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.contact-card .ct{flex:1}
.contact-card .ct .lab{font-size:12.5px;color:var(--txt-faint)}
.contact-card .ct .val{font-size:15.5px;font-weight:700;color:var(--txt);font-family:"SF Mono",monospace}
.contact-card .crow .go{font-size:13px;color:var(--accent);font-weight:600}

/* ===================== 页脚 ===================== */
footer{border-top:1px solid var(--line);padding:56px 0 36px;background:#06070a;margin-top:0}
.foot{display:flex;justify-content:space-between;gap:36px;flex-wrap:wrap}
.foot .fb{max-width:360px}
.foot .fb p{color:var(--txt-faint);font-size:14px;margin-top:12px}
.foot .fc{font-size:14.5px;color:var(--txt-dim)}
.foot .fc .row{margin-bottom:9px}
.foot .fc b{color:var(--txt)}
.foot .fc a:hover{color:var(--accent)}
.copy{margin-top:36px;padding-top:22px;border-top:1px solid var(--line);text-align:center;color:var(--txt-faint);font-size:13px}
.copy a{color:var(--txt-dim)}.copy a:hover{color:var(--accent)}

/* ===================== 弹窗(联系方式)===================== */
.mask{position:fixed;inset:0;background:rgba(0,0,0,.8);backdrop-filter:blur(6px);z-index:200;display:none;align-items:center;justify-content:center;padding:20px}
.mask.show{display:flex}
.modal{background:var(--panel);border:1px solid var(--line-2);border-radius:22px;max-width:440px;width:100%;padding:32px;position:relative;animation:pop .25s}
@keyframes pop{from{transform:scale(.93);opacity:0}to{transform:scale(1);opacity:1}}
.modal .x{position:absolute;top:14px;right:18px;font-size:26px;color:var(--txt-faint);cursor:pointer;line-height:1;z-index:2}
.modal .x:hover{color:var(--txt)}
.modal h3{font-size:22px;font-weight:800}
.modal .msub{color:var(--txt-dim);font-size:14px;margin:8px 0 22px}
.qr-box{background:#fff;border-radius:16px;aspect-ratio:1;max-width:220px;margin:0 auto 20px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;color:#999;font-size:12.5px;text-align:center;padding:18px;border:2px dashed #ccc}
.qr-box img{width:100%;height:100%;object-fit:contain}
.qr-cap{text-align:center;font-size:13px;color:var(--txt-dim);margin-bottom:20px}
.qr-cap b{color:var(--accent)}

.reveal{opacity:0;transform:translateY(26px);transition:.7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}