@import url('https://fonts.googleapis.com/css2?family=Atkinson+Hyperlegible:wght@400;700&family=Crimson+Pro:wght@400;500;600;700&display=swap');

:root{
  --blue:#3bb1ff;
  --red:#ff5252;
  --ink:#000;
  --paper:#fbf7ee;
  --white:#fff;
  --soft:#f1f6fb;
  --line:3px solid #000;
  --shadow:5px 5px 0 #000;
  --shadow-sm:3px 3px 0 #000;
  --serif:"Crimson Pro",Georgia,"Songti SC","SimSun",serif;
  --sans:"Atkinson Hyperlegible","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;padding-left:258px;background:var(--paper);color:var(--ink);font:400 17px/1.72 var(--sans)}
img{max-width:100%;height:auto}
a{color:var(--ink)}
:focus-visible{outline:3px solid var(--red);outline-offset:3px}

/* 侧栏 */
.masthead{position:fixed;top:0;bottom:0;left:0;width:258px;z-index:30;display:flex;flex-direction:column;gap:12px;padding:20px 14px;background:var(--white);border-right:var(--line);overflow-y:auto}
.brand{display:flex;align-items:center;min-height:56px;padding:8px 12px;background:var(--blue);border:var(--line);box-shadow:var(--shadow);color:var(--ink);font:700 24px/1.15 var(--serif);letter-spacing:.05em;text-decoration:none;transition:background .14s,transform .14s,box-shadow .14s}
.brand:hover,.brand:focus-visible{background:var(--red);color:var(--white);transform:translate(-2px,-2px);box-shadow:7px 7px 0 #000}
.snav{display:flex;flex-direction:column;gap:9px}
.grp{background:var(--white);border:var(--line);box-shadow:var(--shadow-sm)}
.grp>summary{display:flex;align-items:center;justify-content:space-between;min-height:44px;padding:10px 12px;font-size:16px;font-weight:700;cursor:pointer;list-style:none}
.grp>summary::-webkit-details-marker{display:none}
.grp>summary::after{content:"+";font:700 20px/1 var(--serif)}
.grp[open]>summary{background:var(--red);color:var(--white)}
.grp[open]>summary::after{content:"\2013"}
.grpbody{display:flex;flex-direction:column;border-top:var(--line)}
.grpbody a{display:flex;align-items:center;min-height:44px;padding:8px 12px;font-size:16px;text-decoration:none;border-bottom:2px solid #000;transition:background .12s,padding-left .12s}
.grpbody a:last-child{border-bottom:0}
.grpbody a:hover,.grpbody a:focus-visible{background:var(--blue);padding-left:16px}

/* 头图 */
.hero{position:relative;overflow:hidden;display:grid;grid-template-columns:1.02fr .98fr;gap:26px;align-items:center;min-height:70vh;padding:46px 40px 46px 32px;background:var(--blue);border-bottom:var(--line)}
.hero-ghost{position:absolute;left:-6px;top:4%;font:700 clamp(84px,13vw,190px)/.88 var(--serif);letter-spacing:.06em;color:rgba(0,0,0,.15);writing-mode:vertical-rl;text-orientation:upright;pointer-events:none;user-select:none}
.hero-copy{grid-column:2;grid-row:1;position:relative;z-index:2;text-align:right}
.hero-copy h1{display:inline-block;margin:0;padding:14px 18px;background:var(--white);border:var(--line);box-shadow:7px 7px 0 #000;font:700 clamp(34px,5vw,60px)/1.06 var(--serif);letter-spacing:.01em;text-align:right;text-wrap:balance}
.hero-art{grid-column:1;grid-row:1;position:relative;z-index:1;height:min(48vh,420px)}
.hero-art .shot{position:absolute;margin:0;width:62%;aspect-ratio:3/4;background:var(--red);border:var(--line);box-shadow:6px 6px 0 #000;overflow:hidden;transition:transform .2s}
.hero-art .shot img{width:100%;height:100%;object-fit:cover}
.hero-art .shot-1{left:0;top:0;transform:rotate(-2.2deg)}
.hero-art .shot-2{right:-4%;bottom:-8%;width:52%;background:var(--white);transform:rotate(2.6deg)}
.hero-art .shot:hover{transform:rotate(0) translateY(-4px)}

/* 正文骨架 */
.wrap{max-width:1180px;margin:0 auto;padding:34px 28px 10px}
.stage{display:grid;grid-template-columns:minmax(0,1fr) 268px;gap:28px;align-items:start}
.sheet{background:var(--white);border:var(--line);border-radius:10px;box-shadow:var(--shadow);padding:28px 30px 18px}
.sheet section[id]{scroll-margin-top:24px}
.sheet section + section{margin-top:46px;padding-top:28px;border-top:3px dashed #000}
.sheet h2{margin:0 0 14px;padding-left:14px;border-left:9px solid var(--red);font:700 clamp(23px,2.6vw,31px)/1.25 var(--serif)}
.sheet h3{margin:26px 0 10px;font:700 22px/1.32 var(--serif)}
.sheet p{margin:0 0 16px}
.sheet ul,.sheet ol{margin:0 0 18px;padding-left:24px}
.sheet li{margin:0 0 8px}
.sheet strong{font-weight:700;border-bottom:3px solid var(--blue)}
.sheet a{text-decoration:underline 3px var(--red);text-underline-offset:3px;font-weight:700}
.sheet a:hover{background:var(--blue)}
.sheet blockquote{margin:0 0 20px;padding:14px 18px;background:var(--soft);border:var(--line);border-left-width:10px;border-radius:6px}
.sheet blockquote p:last-child{margin:0}
.sheet table{width:100%;border-collapse:collapse;margin:0 0 20px;font-size:16px}
.sheet th,.sheet td{border:2px solid #000;padding:9px 11px;text-align:left}
.sheet th{background:var(--blue)}
.sheet figure{margin:0 0 20px}
.sheet img{border:var(--line);border-radius:8px;box-shadow:var(--shadow-sm)}

/* 右侧栏 */
.rail{position:sticky;top:24px;background:var(--white);border:var(--line);border-radius:10px;box-shadow:var(--shadow);padding:18px 16px 12px}
.rail h2{margin:0 0 4px;font:700 21px/1.2 var(--serif)}
.rail .subtitle{margin:0 0 14px;font-size:16px;font-weight:700;color:var(--red)}
.rail dl{margin:0}
.rail dt{margin:14px 0 0;padding:3px 8px;background:var(--blue);border:2px solid #000;font-size:16px;font-weight:700}
.rail dt:first-child{margin-top:0}
.rail dd{margin:0}
.rail dd a{display:flex;align-items:center;min-height:40px;padding:6px 8px;font-size:16px;text-decoration:none;border-bottom:2px solid #000;transition:background .12s}
.rail dd a:hover,.rail dd a:focus-visible{background:var(--soft)}

/* 页脚 */
.foot{margin-top:44px;background:var(--ink);color:var(--white);border-top:var(--line)}
.foot-top{display:grid;grid-template-columns:1fr 1fr;gap:26px;max-width:1180px;margin:0 auto;padding:34px 28px 10px}
.foot-id address{display:inline-block;padding:10px 14px;background:var(--blue);border:var(--line);box-shadow:var(--shadow);color:var(--ink);font:700 25px/1.2 var(--serif);font-style:normal;letter-spacing:.04em}
.foot-nav dl{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:0}
.foot-nav dt{color:var(--blue);font-size:16px;font-weight:700;margin-bottom:6px}
.foot-nav dd{margin:0}
.foot-nav a{display:flex;align-items:center;min-height:40px;padding:4px 0;color:var(--white);font-size:16px;text-decoration:none;border-bottom:2px solid #3a3a3a}
.foot-nav a:hover,.foot-nav a:focus-visible{color:var(--red);border-bottom-color:var(--red)}
.foot-mid{max-width:1180px;margin:0 auto;padding:14px 28px 18px}
.signup{display:flex;gap:10px;max-width:540px;padding:8px;background:var(--white);border:var(--line);box-shadow:var(--shadow)}
.signup input{flex:1 1 auto;min-width:0;min-height:44px;padding:0 10px;border:0;background:var(--white);color:var(--ink);font:inherit;font-size:16px}
.signup button{flex:0 0 auto;min-height:44px;padding:0 20px;background:var(--red);border:var(--line);color:var(--white);font:700 16px/1 var(--sans);cursor:pointer;transition:transform .12s,box-shadow .12s}
.signup button:hover{transform:translate(-2px,-2px);box-shadow:3px 3px 0 #000}
.foot-base{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;max-width:1180px;margin:0 auto;padding:16px 28px 30px;border-top:2px solid #3a3a3a}
.copy{font-size:16px}
.foot-links{display:flex;flex-wrap:wrap;gap:16px;margin:0;padding:0;list-style:none}
.foot-links a{display:inline-flex;align-items:center;min-height:40px;color:var(--white);font-size:16px;text-decoration:none}
.foot-links a:hover,.foot-links a:focus-visible{color:var(--blue);text-decoration:underline 3px var(--blue);text-underline-offset:4px}

/* 移动端 */
@media (max-width:900px){
  body{padding-left:0}
  .masthead{position:sticky;top:0;left:auto;bottom:auto;width:auto;z-index:40;flex-direction:row;align-items:center;gap:8px;padding:8px 10px;border-right:0;border-bottom:var(--line);overflow:visible}
  .brand{min-height:44px;padding:6px 10px;font-size:19px;box-shadow:var(--shadow-sm)}
  .snav{flex:1;flex-direction:row;justify-content:flex-end;gap:6px;position:relative}
  .grp{box-shadow:var(--shadow-sm)}
  .grp>summary{min-height:44px;padding:8px 10px;font-size:16px}
  .grpbody{position:absolute;top:100%;right:0;width:min(74vw,280px);background:var(--white);border:var(--line);box-shadow:4px 4px 0 #000;max-height:66vh;overflow-y:auto}
  .hero{grid-template-columns:1fr;min-height:0;padding:24px 16px 28px;gap:16px}
  .hero-ghost{font-size:clamp(64px,26vw,130px);top:2%}
  .hero-copy{grid-column:1;grid-row:1}
  .hero-copy h1{font-size:clamp(28px,8vw,40px);padding:12px 14px;box-shadow:5px 5px 0 #000}
  .hero-art{grid-column:1;grid-row:2;height:210px;margin-top:6px}
  .hero-art .shot{width:55%;box-shadow:4px 4px 0 #000}
  .hero-art .shot-2{right:0;bottom:-6%;width:46%}
  .wrap{padding:22px 14px 8px}
  .stage{grid-template-columns:minmax(0,1fr);gap:22px}
  .sheet{padding:20px 16px 12px}
  .sheet section[id]{scroll-margin-top:86px}
  .sheet section + section{margin-top:34px;padding-top:20px}
  .rail{position:static}
  .foot-top{grid-template-columns:1fr;padding:26px 16px 6px}
  .foot-nav dl{grid-template-columns:1fr 1fr}
  .foot-mid{padding:12px 16px 16px}
  .foot-base{padding:14px 16px 26px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *{transition:none !important;animation:none !important}
}

button[aria-expanded]{min-width:44px;min-height:44px}