/* wenhuasla.com 首页（2026-10 重做）
   方向：英语笔记本 × 杂志编辑风 —— 暖纸底、墨色字、老师的红笔做唯一强调色，
   英文用 Instrument Serif（OFL），中文标题用思源宋体子集（OFL，只含本页用到的字）。 */
@font-face{font-family:"Instrument Serif";font-style:normal;font-weight:400;font-display:swap;src:url(fonts/instrument-serif.woff2) format("woff2")}
@font-face{font-family:"Instrument Serif";font-style:italic;font-weight:400;font-display:swap;src:url(fonts/instrument-serif-italic.woff2) format("woff2")}
@font-face{font-family:"Notes Song";font-weight:600;font-display:swap;src:url(fonts/noto-serif-sc-sub.woff2) format("woff2")}

:root{
  --paper:#F3EEE4; --paper-2:#EBE4D6; --card:#FBF8F2;
  --ink:#1D1B18; --ink-2:#4A453D; --ink-3:#8A8275; --rule:#D8CFBE;
  --red:#C8412B; --red-2:#E9B9A9; --blue:#2F4A6B;
  --en:"Instrument Serif","Times New Roman",serif;
  --song:"Notes Song","Noto Serif SC","Source Han Serif SC","Songti SC","STSong",serif;
  --zh:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --w:1160px; --gut:clamp(20px,5vw,56px);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.8 var(--zh);-webkit-font-smoothing:antialiased;overflow-x:hidden}
/* 纸张颗粒：一层极淡的噪点盖在最上面，不挡点击 */
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:50;opacity:.35;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .45  0 0 0 0 .4  0 0 0 0 .3  0 0 0 .09 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
a{color:inherit}
::selection{background:var(--red-2);color:var(--ink)}
:focus-visible{outline:2px solid var(--red);outline-offset:4px;border-radius:4px}
.skip{position:absolute;left:-999px;top:8px;background:var(--ink);color:var(--paper);padding:8px 14px;border-radius:6px;z-index:60}
.skip:focus{left:12px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
b{font-weight:600;color:var(--ink)}

/* ---------- 刊头 ---------- */
.mast{position:sticky;top:0;z-index:40;background:color-mix(in srgb,var(--paper) 86%,transparent);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:border-color .3s}
.mast.scrolled{border-bottom-color:var(--rule)}
.mast-in{max-width:var(--w);margin:0 auto;padding:16px var(--gut);display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand-mark{width:34px;height:34px;border-radius:50%;border:1.5px solid var(--ink);display:grid;place-items:center;
  font:italic 22px/1 var(--en);padding-top:2px;transition:transform .5s cubic-bezier(.2,.7,.2,1)}
.brand:hover .brand-mark{transform:rotate(-12deg)}
.brand-zh{font:600 17px/1 var(--song);letter-spacing:.06em}
.toc{display:flex;gap:30px;font-size:14px}
.toc a{text-decoration:none;color:var(--ink-2);display:flex;align-items:baseline;gap:6px;position:relative;padding:4px 0}
.toc i{font:italic 15px/1 var(--en);color:var(--red)}
.toc a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--ink);transform:scaleX(0);transform-origin:right;transition:transform .35s ease}
.toc a:hover::after{transform:scaleX(1);transform-origin:left}

/* ---------- 封面 ---------- */
.hero{position:relative;max-width:var(--w);margin:0 auto;padding:clamp(56px,10vh,120px) var(--gut) clamp(64px,10vh,120px);
  display:grid;grid-template-columns:minmax(0,1fr) 300px;column-gap:56px;align-items:end}
/* 笔记本的红色页边线 */
.hero::before{content:"";position:absolute;top:0;bottom:0;left:calc(var(--gut) - 22px);width:1.5px;background:var(--red);opacity:.55}
.hero-meta{grid-column:1/-1;display:flex;align-items:center;gap:12px;font:italic 18px/1 var(--en);color:var(--ink-3);margin-bottom:28px}
.hero-meta .dot{width:5px;height:5px;border-radius:50%;background:var(--red)}
.hero-title{margin:0;grid-column:1;font-weight:400}
.hero-title .en{display:block;font:400 clamp(52px,9.2vw,128px)/.95 var(--en);letter-spacing:-.02em;position:relative;width:max-content;max-width:100%}
.hero-title em{font-style:italic}
.hero-title em.ink{color:var(--red)}
.stroke{position:absolute;right:-2%;bottom:-.3em;width:62%;height:.22em;overflow:visible}
.stroke path{fill:none;stroke:var(--red);stroke-width:3.2;stroke-linecap:round;stroke-dasharray:400;stroke-dashoffset:400;
  animation:draw 1.1s 1.25s cubic-bezier(.6,.1,.2,1) forwards}
.hero-title .zh{display:block;margin-top:34px;font:600 clamp(22px,2.6vw,30px)/1.3 var(--song);letter-spacing:.32em;color:var(--ink-2)}
.hero-lede{grid-column:1;max-width:34em;margin:22px 0 0;color:var(--ink-2);font-size:17px}
.cta{grid-column:1;justify-self:start;margin-top:34px;display:inline-flex;align-items:center;gap:14px;text-decoration:none;
  background:var(--ink);color:var(--paper);padding:15px 26px 15px 30px;border-radius:999px;font-size:16px;letter-spacing:.04em;
  transition:background .25s,gap .25s}
.cta svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.cta:hover{background:var(--red);gap:20px}

/* 今日一词：像夹在本子里的索引卡，微微歪一点 */
.hero-card{grid-column:2;grid-row:2/5;align-self:center;background:var(--card);padding:24px 26px 24px;border-radius:4px;
  box-shadow:0 1px 0 var(--rule),0 22px 40px -26px rgba(60,40,10,.45);transform:rotate(2.2deg);position:relative;
  background-image:repeating-linear-gradient(transparent 0 31px,#E8DFCF 31px 32px);background-position:0 24px}
.hero-card::before{content:"";position:absolute;top:-12px;left:50%;width:84px;height:24px;margin-left:-42px;
  background:rgba(200,65,43,.16);transform:rotate(-3deg)}
.hero-card p{margin:0}
.card-k{font:italic 15px/32px var(--en);color:var(--red)}
.card-w{font:400 40px/64px var(--en)}
.card-p{color:var(--ink-3);font-size:14px;line-height:32px}
.card-p span{font:italic 15px var(--en);margin-left:6px}
.card-m{font:600 17px/32px var(--song)}
.card-s{font:italic 18px/32px var(--en);color:var(--ink-2)}
.card-s b{color:var(--red);font-weight:400}

/* ---------- 分节通用 ---------- */
.sec{max-width:var(--w);margin:0 auto;padding:clamp(64px,10vw,120px) var(--gut) 0}
.sec-head{display:flex;align-items:flex-end;gap:22px;padding-bottom:22px;border-bottom:1.5px solid var(--ink);margin-bottom:48px}
.sec-no{font:italic 400 clamp(72px,10vw,128px)/.78 var(--en);color:var(--red)}
.sec-en{margin:0;font:italic 20px/1 var(--en);color:var(--ink-3)}
.sec-head h2{margin:8px 0 0;font:600 clamp(28px,3.4vw,40px)/1.2 var(--song);letter-spacing:.08em}
h3{margin:0;font:600 22px/1.4 var(--song);letter-spacing:.04em}

/* 01 核心技巧：三栏，竖线分隔 */
.skills{display:grid;grid-template-columns:repeat(3,1fr)}
.skill{padding:6px 34px 10px;border-left:1px solid var(--rule)}
.skill:first-child{padding-left:0;border-left:0}
.skill-en{margin:0 0 10px;font:italic 26px/1.1 var(--en);color:var(--blue)}
.skill h3{margin-bottom:12px}
.skill p:last-child{margin:0;color:var(--ink-2)}

/* 引言 */
.quote{max-width:920px;margin:clamp(80px,12vw,150px) auto 0;padding:0 var(--gut);text-align:center}
.quote blockquote{margin:0;font:italic 400 clamp(28px,4vw,46px)/1.22 var(--en);letter-spacing:-.005em}
.quote figcaption{margin-top:22px;font:italic 18px var(--en);color:var(--ink-3)}
.quote figcaption span{display:block;margin-top:6px;font:14px/1.7 var(--zh);color:var(--ink-3)}

/* 02 资源：目录式条目 */
.res{list-style:none;margin:0;padding:0;counter-reset:r}
.res li{display:grid;grid-template-columns:180px 220px 1fr;gap:24px;align-items:baseline;padding:26px 0;border-bottom:1px solid var(--rule);
  transition:background .3s,padding .3s}
.res li:hover{background:var(--paper-2);padding-left:14px;padding-right:14px}
.res-tag{font:italic 24px/1 var(--en);color:var(--red)}
.res p{margin:0;color:var(--ink-2)}

/* 03 方法：遗忘曲线招牌 + 五张卡 */
.curve{margin:0 0 56px;display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:48px;align-items:center;
  background:var(--card);padding:clamp(24px,4vw,44px);border-radius:6px;box-shadow:0 1px 0 var(--rule)}
.curve-text h3{font-size:26px;margin:6px 0 14px}
.curve-text p{color:var(--ink-2);margin:0}
.method-no{margin:0;font:italic 20px/1 var(--en);color:var(--red)}
.curve-legend{display:flex;align-items:center;gap:8px;margin-top:20px!important;font-size:13px;color:var(--ink-3)!important}
.curve-legend span{display:inline-block;width:22px;height:0;border-top:2px solid}
.lg-a{border-color:var(--ink-3)!important;border-top-style:dashed!important}
.lg-b{border-color:var(--red)!important;margin-left:14px}
.curve-svg{width:100%;height:auto;overflow:visible}
.curve-svg .grid line{stroke:var(--rule);stroke-width:1}
.curve-svg .grid .dash{stroke-dasharray:3 5}
.curve-svg text{font:13px var(--zh);fill:var(--ink-3)}
.curve-svg .ticks text{text-anchor:middle}
.curve-svg .decay{fill:none;stroke:var(--ink-3);stroke-width:2;stroke-dasharray:6 6}
.curve-svg .review{fill:none;stroke:var(--red);stroke-width:2.6;stroke-linejoin:round;stroke-dasharray:1400;stroke-dashoffset:1400}
.curve-svg .ticks circle{fill:var(--card);stroke:var(--red);stroke-width:2;opacity:0;transition:opacity .4s}
.curve.in .review{animation:draw 2.4s .25s cubic-bezier(.5,0,.2,1) forwards}
.curve.in .ticks circle{opacity:1}
.curve.in .ticks circle:nth-of-type(1){transition-delay:.6s}
.curve.in .ticks circle:nth-of-type(2){transition-delay:.9s}
.curve.in .ticks circle:nth-of-type(3){transition-delay:1.2s}
.curve.in .ticks circle:nth-of-type(4){transition-delay:1.6s}
.curve.in .ticks circle:nth-of-type(5){transition-delay:2s}

.methods{display:grid;grid-template-columns:repeat(6,1fr);gap:22px}
.method{grid-column:span 2;background:var(--card);padding:26px 26px 24px;border-radius:6px;box-shadow:0 1px 0 var(--rule);
  position:relative;transition:transform .35s cubic-bezier(.2,.7,.2,1),box-shadow .35s}
/* 后两张占满一行（3 + 2 的杂志排法） */
.method:nth-child(4),.method:nth-child(5){grid-column:span 3}
.method h3{margin:8px 0 10px}
.method p:last-child{margin:0;color:var(--ink-2)}
.method::after{content:"";position:absolute;left:26px;right:26px;bottom:0;height:2px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .4s ease}
.method:hover{transform:translateY(-4px);box-shadow:0 1px 0 var(--rule),0 18px 30px -22px rgba(60,40,10,.45)}
.method:hover::after{transform:scaleX(1)}

/* 结语 */
.coda{text-align:center;padding:clamp(96px,14vw,170px) var(--gut) clamp(72px,10vw,120px)}
.coda-en{margin:0;font:italic 400 clamp(44px,7vw,92px)/1 var(--en);letter-spacing:-.02em}
.coda-zh{margin:16px 0 0;font:600 18px var(--song);letter-spacing:.4em;color:var(--ink-3)}

/* ---------- 页脚 ---------- */
.foot{border-top:1.5px solid var(--ink)}
.foot-in{max-width:var(--w);margin:0 auto;padding:26px var(--gut) calc(26px + env(safe-area-inset-bottom));
  display:flex;justify-content:space-between;align-items:center;gap:12px 32px;flex-wrap:wrap;font-size:13px;color:var(--ink-3)}
.foot p{margin:0}
.beian{display:flex;gap:22px;flex-wrap:wrap}
.beian a{text-decoration:none;display:inline-flex;align-items:center;gap:6px;transition:color .2s}
.beian a:hover{color:var(--ink)}

/* ---------- 动效 ---------- */
@keyframes draw{to{stroke-dashoffset:0}}
@keyframes rise{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:none}}
.rise{animation:rise .9s calc(var(--d,0) * .12s + .1s) cubic-bezier(.2,.7,.2,1) backwards}
.hero-card.rise{animation-name:riseCard}
@keyframes riseCard{from{opacity:0;transform:translateY(30px) rotate(6deg)}to{opacity:1;transform:rotate(2.2deg)}}
/* 滚动出现：只在 JS 跑起来后才先藏起来，脚本挂了内容照常可见 */
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .8s ease,transform .8s cubic-bezier(.2,.7,.2,1)}
.js .reveal.in{opacity:1;transform:none}
.js .skills .reveal:nth-child(2),.js .methods .reveal:nth-child(2),.js .methods .reveal:nth-child(5){transition-delay:.12s}
.js .skills .reveal:nth-child(3),.js .methods .reveal:nth-child(3){transition-delay:.24s}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rise,.hero-card.rise{animation:none}
  .stroke path,.curve-svg .review{animation:none!important;stroke-dashoffset:0}
  .curve-svg .ticks circle{opacity:1}
  .js .reveal{opacity:1;transform:none;transition:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .hero{grid-template-columns:1fr}
  .hero-card{grid-column:1;grid-row:auto;justify-self:start;width:min(320px,100%);margin-top:56px}
  .skills{grid-template-columns:1fr}
  .skill{padding:22px 0;border-left:0;border-top:1px solid var(--rule)}
  .skill:first-child{border-top:0;padding-top:0}
  .res li{grid-template-columns:1fr;gap:6px}
  .curve{grid-template-columns:1fr;gap:28px}
  .methods{grid-template-columns:1fr 1fr}
  .method,.method:nth-child(4),.method:nth-child(5){grid-column:span 1}
}
@media (max-width:640px){
  body{font-size:15px}
  .toc{display:none}
  .hero::before{left:10px}
  .hero-title .zh{letter-spacing:.2em}
  .sec-head{gap:14px}
  .methods{grid-template-columns:1fr}
  .foot-in{flex-direction:column;align-items:flex-start}
}