/* 未勾勒 WEIGŌULÈ — 黑白灰 + 朱砂 */
:root{
  --paper:#f6f3ec; --paper2:#efe9db; --ink:#1a1a1a; --gray:#6b675e;
  --line:#ddd5c3; --cinnabar:#b3261e; --gold:#b99c5e; --mist:#5a6b7a;
  --card:#fffdf7; --shadow:0 20px 50px rgba(26,26,26,.08);
  --serif:"Noto Serif SC",serif; --sans:"Noto Sans SC",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-weight:300;line-height:1.8;overflow-x:hidden}
::selection{background:var(--cinnabar);color:#fff}
.grain{position:fixed;inset:0;pointer-events:none;z-index:60;opacity:.5;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence baseFrequency='.9'/%3E%3CfeColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .05 0'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E");}

/* 导航 */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:space-between;
  padding:14px 4vw;transition:.35s;background:transparent}
.nav.scrolled{background:rgba(246,243,236,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);padding:10px 4vw}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.seal{width:42px;height:42px;background:var(--cinnabar);color:#fff;display:grid;place-items:center;
  font-family:var(--serif);font-weight:900;font-size:22px;border-radius:6px;box-shadow:3px 3px 0 var(--ink)}
.brand-text{font-family:var(--serif);font-weight:600;font-size:20px;letter-spacing:4px;line-height:1.1}
.brand-text small{display:block;font-family:var(--sans);font-weight:300;font-size:10px;letter-spacing:3px;color:var(--gray)}
.links{display:flex;gap:28px;align-items:center}
.links a{color:var(--ink);text-decoration:none;font-size:14px;letter-spacing:2px;position:relative}
.links a::after{content:"";position:absolute;left:0;bottom:-4px;width:0;height:1px;background:var(--cinnabar);transition:.3s}
.links a:hover::after{width:100%}
.btn-small{border:1px solid var(--ink);padding:6px 18px;border-radius:99px}
.btn-small:hover{background:var(--ink);color:#fff !important}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:8px;font-size:20px;padding:4px 12px;cursor:pointer}
.mobile-menu{display:none;position:fixed;top:70px;left:4vw;right:4vw;z-index:49;background:var(--card);border:1px solid var(--line);
  border-radius:14px;box-shadow:var(--shadow);overflow:hidden}
.mobile-menu.open{display:block}
.mobile-menu a{display:block;padding:14px 20px;text-decoration:none;color:var(--ink);border-bottom:1px solid var(--line)}
.mobile-menu a:last-child{border:none}

/* 首屏 */
.hero{min-height:100vh;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden;
  background:linear-gradient(180deg,#f8f5ee 0%,var(--paper) 60%,var(--paper2) 100%)}
#ink{position:absolute;inset:0;width:100%;height:100%}
.hero-inner{position:relative;z-index:2;text-align:center;padding:120px 6vw 80px;max-width:900px}
.hero-kicker{letter-spacing:6px;font-size:13px;color:var(--gray)}
.hero-title{font-family:var(--serif);font-weight:900;font-size:clamp(90px,20vw,210px);line-height:1.1;letter-spacing:.08em;margin:10px 0 20px}
.hero-title .char{display:inline-block;opacity:0;transform:translateY(60px) rotate(4deg);animation:rise 1s forwards}
.hero-title .char:nth-child(2){animation-delay:.18s}
.hero-title .char:nth-child(3){animation-delay:.36s;color:var(--cinnabar)}
@keyframes rise{to{opacity:1;transform:none}}
.hero-sub{font-size:clamp(15px,2.4vw,19px);color:#3d3a34}
.hero-actions{margin-top:34px;display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;background:var(--ink);color:#fff;text-decoration:none;padding:14px 34px;border-radius:99px;
  letter-spacing:2px;font-size:15px;border:1px solid var(--ink);transition:.3s;cursor:pointer;font-family:var(--sans)}
.btn:hover{background:var(--cinnabar);border-color:var(--cinnabar);transform:translateY(-2px)}
.btn.ghost{background:transparent;color:var(--ink)}
.btn.ghost:hover{background:var(--ink);color:#fff}
.hero-meta{margin-top:44px;display:flex;gap:14px;justify-content:center;align-items:center;font-size:12px;letter-spacing:2px;color:var(--gray);flex-wrap:wrap}
.hero-meta i{width:26px;height:1px;background:var(--line)}
.red-sun{position:absolute;top:12%;right:10%;width:110px;height:110px;border-radius:50%;
  background:radial-gradient(circle at 35% 35%,#d84a3a,var(--cinnabar) 70%);opacity:.9;filter:blur(.3px);
  animation:float 7s ease-in-out infinite;z-index:1}
@keyframes float{50%{transform:translateY(-18px)}}
.scroll-hint{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);font-size:12px;letter-spacing:4px;color:var(--gray);z-index:2}
.scroll-hint span{display:block;width:1px;height:44px;background:var(--ink);margin:8px auto 0;animation:drip 1.8s infinite}
@keyframes drip{0%{transform:scaleY(0);transform-origin:top}55%{transform:scaleY(1);transform-origin:top}56%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* 跑马灯 */
.marquee{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--ink);color:var(--paper);overflow:hidden;white-space:nowrap}
.marquee-track{display:inline-block;padding:12px 0;letter-spacing:3px;font-size:14px;animation:slide 22s linear infinite}
@keyframes slide{to{transform:translateX(-50%)}}

/* 通用 section */
.section{padding:110px 6vw;max-width:1200px;margin:0 auto}
.sec-head{display:flex;align-items:baseline;gap:18px;margin-bottom:44px;flex-wrap:wrap}
.num{font-family:var(--serif);font-size:15px;color:var(--cinnabar);border:1px solid var(--cinnabar);border-radius:99px;padding:2px 14px;letter-spacing:2px}
.sec-head h2{font-family:var(--serif);font-weight:600;font-size:clamp(28px,4.5vw,44px);letter-spacing:4px}
.sec-head h2 em{font-style:normal;font-size:15px;color:var(--gray);font-family:var(--sans);letter-spacing:2px;margin-left:8px}
.reveal{opacity:0;transform:translateY(36px);transition:opacity .8s,transform .8s}
.reveal.in{opacity:1;transform:none}

/* 起念 */
.lead{font-family:var(--serif);font-size:clamp(18px,3vw,26px);line-height:2.1;margin-bottom:44px}
.idea-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:34px 28px;box-shadow:var(--shadow);transition:.35s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-8px)}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--cinnabar),var(--gold))}
.card-no{font-family:var(--serif);font-weight:900;font-size:52px;color:transparent;-webkit-text-stroke:1.5px var(--cinnabar);line-height:1}
.card h3{font-family:var(--serif);font-size:21px;margin:12px 0 8px;letter-spacing:2px}
.card p{font-size:14.5px;color:#4a463e}
.poem{margin-top:56px;text-align:center;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:44px 20px}
.poem p{font-family:var(--serif);font-size:clamp(20px,3.4vw,30px);letter-spacing:3px}
.poem span{font-size:13px;color:var(--gray);letter-spacing:2px}

/* 留白 */
.blank{max-width:none;background:var(--ink);color:var(--paper);border-radius:28px;margin:0 3vw;padding:90px 5vw}
.blank .sec-head h2 em{color:#b7b0a1}
.blank-grid{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:start}
.blank h3{font-family:var(--serif);letter-spacing:3px;font-size:22px;margin-bottom:18px}
.blank-meter{display:flex;align-items:center;gap:18px;margin-bottom:18px}
.blank-bar{flex:1;height:10px;background:#3a382f;border-radius:99px;overflow:hidden}
.blank-bar div{height:100%;width:32%;background:linear-gradient(90deg,var(--gold),var(--cinnabar));border-radius:99px;transition:.3s}
.blank-value b{font-family:var(--serif);font-size:34px;color:var(--gold)}
.blank-desc{color:#c9c2b2;font-size:14.5px;margin-bottom:20px}
.slider-row{display:flex;align-items:center;gap:14px;font-size:14px;letter-spacing:2px;margin-bottom:22px}
input[type=range]{flex:1;accent-color:var(--cinnabar);cursor:pointer}
.blank-demo{background:var(--paper);border-radius:18px;padding:26px;display:grid;place-items:center}
.blank-demo svg{width:min(320px,70vw);height:auto}
.blank-demo .ring{fill:none;stroke:var(--ink);stroke-width:2;opacity:.9}
.blank-demo .stroke{fill:none;stroke:var(--cinnabar);stroke-width:5;stroke-linecap:round}
.blank-demo .dot{fill:var(--cinnabar)}
.blank-right blockquote{font-family:var(--serif);font-size:clamp(20px,3vw,28px);line-height:1.9;border-left:3px solid var(--cinnabar);padding-left:22px;margin-bottom:30px}
.blank-list{list-style:none;display:grid;gap:16px}
.blank-list li{background:#24221c;border:1px solid #3a372c;border-radius:14px;padding:18px 20px;font-size:14.5px;color:#d8d2c2}
.blank-list b{color:var(--gold);font-weight:500;margin-right:8px}

/* 作品 */
.filter{margin-left:auto;display:flex;gap:10px}
.filter button{background:none;border:1px solid var(--line);border-radius:99px;padding:7px 20px;font-size:13px;letter-spacing:2px;cursor:pointer;font-family:var(--sans);color:var(--ink)}
.filter button.active,.filter button:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.works-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px}
.work{background:var(--card);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);transition:.35s}
.work:hover{transform:translateY(-8px)}
.work.hide{display:none}
.work-art{height:190px;display:grid;place-items:center;font-family:var(--serif);font-size:64px;font-weight:900;letter-spacing:10px;color:rgba(255,255,255,.92)}
.art-1{background:linear-gradient(135deg,#2b2b2b,#5a6b7a)} .art-2{background:linear-gradient(135deg,#b3261e,#5c1410)}
.art-3{background:linear-gradient(135deg,#3d3a34,#b99c5e)} .art-4{background:linear-gradient(135deg,#e4dcc8,#8f8875);color:#2b2b2b !important}
.art-5{background:linear-gradient(135deg,#1a1a1a,#4a463e)} .art-6{background:linear-gradient(135deg,#5a6b7a,#1a1a1a)}
.work-body{padding:24px}
.work-body h3{font-family:var(--serif);font-size:19px;letter-spacing:1px}
.work-body h3 i{font-style:normal;font-size:12px;color:var(--cinnabar);margin-left:8px}
.work-body p{font-size:14px;color:#4a463e;margin:8px 0 12px}
.tags{display:flex;gap:8px}
.tags span{font-size:12px;background:var(--paper2);border-radius:99px;padding:2px 12px;color:var(--gray)}

/* 共创 */
.draw{max-width:none;background:var(--paper2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.draw-intro{font-size:16px;margin:-20px 0 30px;color:#4a463e}
.draw .section,.board-wrap{max-width:1200px;margin:0 auto}
.board-wrap{background:var(--card);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);overflow:hidden}
.board-wrap{max-width:1200px;margin:0 auto}

/* 信札 */
.letter-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.letter-form{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:34px;box-shadow:var(--shadow);display:grid;gap:18px}
.letter-form label{display:grid;gap:8px;font-size:14px;letter-spacing:2px}
.letter-form input,.letter-form textarea{border:1px solid var(--line);border-radius:12px;padding:13px 15px;font-size:15px;font-family:var(--sans);background:#fff;resize:vertical}
.letter-form input:focus,.letter-form textarea:focus{outline:2px solid var(--cinnabar);border-color:var(--cinnabar)}
.form-tip{font-size:13px;color:var(--cinnabar);min-height:20px}
.letter-wall h3{font-family:var(--serif);letter-spacing:3px;margin-bottom:18px;font-size:20px}
.letter-wall ul{list-style:none;display:grid;gap:14px}
.letter-wall li{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 20px;font-size:14.5px}
.letter-wall li span{display:block;color:var(--gray);font-size:13px;margin-top:6px}
.letter-wall .wall-count{font-size:13px;color:var(--gray);letter-spacing:1px;font-family:var(--sans);font-weight:300}
.letter-wall .wall-empty{color:var(--gray);text-align:center;padding:30px 20px;letter-spacing:1px}
.letter-wall .msg-meta{display:block;color:#a49d8e;font-size:11.5px;font-style:normal;margin-top:8px;letter-spacing:1px}
.letter-wall .msg-like{border:1px solid var(--line);background:#fff;color:var(--cinnabar);border-radius:99px;
  padding:2px 12px;font-size:12px;cursor:pointer;margin-top:8px;transition:.2s}
.letter-wall .msg-like:hover:not(:disabled){background:var(--cinnabar);color:#fff;border-color:var(--cinnabar)}
.letter-wall .msg-like:disabled{opacity:.5;cursor:default}

/* 页脚 */
.footer{background:var(--ink);color:#c9c2b2;padding:70px 6vw 30px;margin-top:40px}
.foot-inner{max-width:1200px;margin:0 auto;display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.foot-brand{display:flex;gap:16px;font-size:14px}
.foot-links{display:flex;gap:24px;align-items:center;flex-wrap:wrap}
.foot-links a{color:#c9c2b2;text-decoration:none;font-size:14px}
.foot-links a:hover{color:#fff}
.copyright{text-align:center;margin-top:50px;font-size:12.5px;letter-spacing:2px;color:#8d8778;border-top:1px solid #3a372c;padding-top:24px}

/* 光标 */
.cursor{position:fixed;width:22px;height:22px;border:1.5px solid var(--cinnabar);border-radius:50%;pointer-events:none;z-index:99;
  transform:translate(-50%,-50%);transition:width .25s,height .25s,background .25s;mix-blend-mode:multiply}
.cursor.big{width:52px;height:52px;background:rgba(179,38,30,.12)}
@media(hover:none){.cursor{display:none}}

@media(max-width:900px){
  .links{display:none}.menu-btn{display:block}
  .blank-grid,.letter-grid{grid-template-columns:1fr}
  .blank{margin:0;border-radius:0}
  .filter{margin-left:0}
}