/* ============================================================
   0 · 基础与主题变量
   参考站点：深墨底 + 米白 + 薄荷绿，宋体标题 + 等宽小标签
   ============================================================ */
@font-face{font-family:"Songti SC";src:local("Songti SC"),local("Noto Serif CJK SC"),local("Source Han Serif SC")}
@font-face{font-family:"PingFang SC";src:local("PingFang SC"),local("Noto Sans CJK SC"),local("Source Han Sans SC")}
@font-face{font-family:"DejaVu Sans Mono";src:local("DejaVu Sans Mono"),local("Menlo"),local("SFMono-Regular")}

:root{
  /* 深色（默认）：与参考站一致的墨绿夜色 */
  --bg:#060807;
  --bg-2:#0a0d0c;
  --bg-3:#101413;
  --fg:#f2efe7;
  --fg-2:rgba(242,239,231,.66);
  --fg-3:rgba(242,239,231,.40);
  --accent:#93c9b7;
  --accent-2:#6fae9e;
  --deep:#2f5148;
  --warm:#c69a6d;
  --on-accent:#06110d;
  --on-accent-soft:rgba(6,17,13,.14);
  --line:rgba(242,239,231,.10);
  --line-2:rgba(242,239,231,.055);
  --nav-bg:rgba(6,8,7,.72);
  --card-soft:rgba(242,239,231,.028);
  --stat-bg:#f2efe7;
  --stat-fg:#0b1411;
  --btn-bg:#f2efe7;
  --btn-fg:#08100d;
  --grain:.05;
  --serif:"Songti SC","Noto Serif CJK SC","Songti TC",STSong,SimSun,serif;
  --sans:"PingFang SC","Noto Sans CJK SC","Microsoft YaHei",-apple-system,system-ui,sans-serif;
  --mono:"DejaVu Sans Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --ease:cubic-bezier(.16,.84,.28,1);
  --pad:clamp(20px,6vw,112px);
}

/* 浅色主题：同版式，米白纸质底 */
[data-theme="light"]{
  --bg:#f5f2e9;
  --bg-2:#fbf9f3;
  --bg-3:#efece1;
  --fg:#141816;
  --fg-2:rgba(20,24,22,.70);
  --fg-3:rgba(20,24,22,.46);
  --accent:#23705c;
  --accent-2:#2f8a72;
  --deep:#cfe6dd;
  --warm:#a8763f;
  --on-accent:#f7f4ec;
  --on-accent-soft:rgba(247,244,236,.20);
  --line:rgba(20,24,22,.12);
  --line-2:rgba(20,24,22,.07);
  --nav-bg:rgba(245,242,233,.78);
  --card-soft:rgba(20,24,22,.025);
  --stat-bg:#121614;
  --stat-fg:#f5f2e9;
  --btn-bg:#121614;
  --btn-fg:#f5f2e9;
  --grain:.035;
}

/* 自定义主题：沿用深色基底，主色由 JS 注入 */

/* 宽屏下为左侧章节导航留出空间，避免与内容贴边 */
@media (min-width:1281px){
  :root{--pad:clamp(112px,9vw,150px)}
}

*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--fg);
  font-family:var(--sans);font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
  transition:background .5s ease,color .5s ease;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--accent);color:var(--on-accent)}
code,kbd{font-family:var(--mono)}
:focus-visible{outline:1px solid var(--accent);outline-offset:4px;border-radius:4px}

/* 颗粒噪点 */
.grain{
  position:fixed;inset:0;z-index:90;pointer-events:none;opacity:var(--grain);
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* 通用工具类 */
.wrap{width:100%;max-width:1440px;margin:0 auto;padding:0 var(--pad)}
.mono{font-family:var(--mono);font-size:11px;letter-spacing:.26em;text-transform:uppercase;color:var(--fg-3)}
.display{font-family:var(--serif);font-weight:600;letter-spacing:-.02em;line-height:1.02}

/* 顶部阅读进度 */
.progress{position:fixed;top:0;left:0;right:0;height:1px;z-index:120;background:transparent}
.progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--deep),var(--accent));opacity:.85}

/* ============================================================
   1 · 载入层
   ============================================================ */
.loader{
  position:fixed;inset:0;z-index:200;background:var(--bg);
  display:flex;align-items:center;justify-content:center;
  transition:transform 1.05s var(--ease),opacity .6s ease;
}
.loader.done{transform:translateY(-101%)}
.loader__in{width:min(320px,62vw);text-align:center;transition:opacity .4s ease}
.loader.done .loader__in{opacity:0}
.loader__mark{width:52px;height:52px;margin:0 auto 22px;border-radius:14px;opacity:.9;animation:breathe 2.4s ease-in-out infinite}
.loader__name{font-family:var(--serif);font-size:19px;letter-spacing:.34em;color:var(--fg-2)}
.loader__bar{margin-top:26px;height:1px;background:var(--line);position:relative;overflow:hidden}
.loader__bar i{position:absolute;inset:0;transform-origin:left;transform:scaleX(0);background:var(--accent);transition:transform .3s linear}
.loader__num{margin-top:14px;font-family:var(--mono);font-size:10px;letter-spacing:.3em;color:var(--fg-3)}
@keyframes breathe{0%,100%{opacity:.55;transform:scale(.97)}50%{opacity:1;transform:scale(1.03)}}

/* ============================================================
   2 · 顶部导航与主题切换
   ============================================================ */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:130;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 var(--pad);height:74px;
  border-bottom:1px solid transparent;
  transition:background .5s ease,border-color .5s ease,height .5s ease;
}
.nav.stuck{
  background:var(--nav-bg);backdrop-filter:blur(18px) saturate(140%);
  -webkit-backdrop-filter:blur(18px) saturate(140%);
  border-bottom-color:var(--line-2);height:62px;
}
.brand{display:flex;align-items:center;gap:11px;flex:none}
.brand img{width:26px;height:26px;border-radius:8px}
.brand b{font-family:var(--serif);font-size:17px;font-weight:600;letter-spacing:.14em}
.brand s{text-decoration:none;font-family:var(--mono);font-size:9px;letter-spacing:.22em;color:var(--fg-3);margin-left:2px}
.nav__links{display:flex;gap:clamp(18px,2.6vw,42px)}
.nav__links a{position:relative;font-size:13px;letter-spacing:.14em;color:var(--fg-2);transition:color .3s ease}
.nav__links a::after{content:"";position:absolute;left:0;right:0;bottom:-6px;height:1px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease)}
.nav__links a:hover{color:var(--fg)}
.nav__links a:hover::after{transform:scaleX(1)}
.nav__right{display:flex;align-items:center;gap:12px}
.nav__cta{
  display:inline-flex;align-items:center;gap:10px;
  padding:9px 18px;border:1px solid var(--line);border-radius:100px;
  font-size:12px;letter-spacing:.14em;color:var(--fg);
  transition:border-color .4s ease,background .4s ease,transform .4s var(--ease);
}
.nav__cta:hover{border-color:color-mix(in srgb,var(--accent) 60%,transparent);background:color-mix(in srgb,var(--accent) 7%,transparent);transform:translateY(-1px)}
.nav__cta i{width:5px;height:5px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px var(--accent)}

/* 三段式主题切换 */
.theme{position:relative;display:flex;align-items:center;gap:2px;padding:3px;border:1px solid var(--line);border-radius:100px}
.theme > button{width:26px;height:26px;border-radius:50%;display:grid;place-items:center;color:var(--fg-3);transition:color .3s ease,background .3s ease}
.theme > button svg{width:13px;height:13px;fill:none;stroke:currentColor;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}
.theme > button:hover{color:var(--fg)}
.theme > button.on{background:var(--fg);color:var(--bg)}
.theme__pop{
  position:absolute;right:0;top:calc(100% + 12px);width:206px;padding:16px;
  border:1px solid var(--line);border-radius:14px;background:var(--bg-2);
  box-shadow:0 30px 60px -30px rgba(0,0,0,.7);
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity .3s ease,transform .3s var(--ease),visibility .3s;
}
.theme__pop.on{opacity:1;visibility:visible;transform:none}
.theme__pop .mono{font-size:9px}
.theme__sw{display:flex;gap:8px;margin-top:12px}
.theme__sw button{width:24px;height:24px;border-radius:50%;background:var(--sw);border:1px solid var(--line);transition:transform .3s var(--ease),box-shadow .3s ease}
.theme__sw button:hover{transform:scale(1.12)}
.theme__sw button.on{box-shadow:0 0 0 2px var(--bg-2),0 0 0 3px var(--sw)}
.theme__pick{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:14px;padding-top:12px;border-top:1px solid var(--line-2);font-size:11px;letter-spacing:.1em;color:var(--fg-3)}
.theme__pick input{width:34px;height:24px;padding:0;border:1px solid var(--line);border-radius:6px;background:none;cursor:pointer}

/* ============================================================
   3 · 左侧章节导航
   ============================================================ */
.side{
  position:fixed;left:16px;top:50%;transform:translateY(-50%);z-index:110;
  display:flex;flex-direction:column;gap:16px;
  padding:16px 10px;border-left:1px solid var(--line-2);
}
.side a{display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:8.5px;letter-spacing:.14em;color:var(--fg-3);opacity:.85;transition:color .4s ease,opacity .4s ease}
.side a i{width:5px;height:5px;border-radius:50%;background:currentColor;opacity:.4;transition:all .4s var(--ease)}
.side a span{white-space:nowrap;transition:opacity .4s ease}
.side a:hover{color:var(--fg-2)}
.side a.on{color:var(--accent)}
.side a.on i{opacity:1;box-shadow:0 0 10px var(--accent);transform:scale(1.3)}
@media(max-width:1280px){.side{display:none}}

/* ============================================================
   4 · Hero
   ============================================================ */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;overflow:hidden;padding:110px 0 70px}
.hero__bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero__bg::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse 900px 620px at 74% 42%,color-mix(in srgb,var(--deep) 34%,transparent) 0%,color-mix(in srgb,var(--deep) 10%,transparent) 48%,transparent 72%),
    radial-gradient(ellipse 1400px 520px at 50% -6%,color-mix(in srgb,var(--accent) 16%,transparent) 0%,transparent 66%),
    radial-gradient(ellipse 700px 500px at 8% 96%,color-mix(in srgb,var(--warm) 6%,transparent) 0%,transparent 70%);
}
.hero__grid-lines{
  position:absolute;inset:0;z-index:0;
  background-image:linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
  background-size:calc(100% / 6) 100%;
  mask-image:linear-gradient(180deg,transparent,#000 22%,#000 74%,transparent);
  opacity:.55;pointer-events:none;
}
.hero .wrap{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;align-items:center;gap:clamp(30px,4vw,60px)}

.eyebrow{display:inline-flex;align-items:center;gap:12px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.3em;color:var(--fg-3);text-transform:uppercase}
.eyebrow .dot{width:5px;height:5px;border-radius:50%;background:var(--accent);box-shadow:0 0 12px var(--accent)}

.hero h1{margin:26px 0 0;font-size:clamp(46px,6.6vw,104px)}
.hero h1 .l1{display:block;letter-spacing:.06em;line-height:1.02}
.hero h1 .l2{display:block;margin-top:.1em;font-size:.62em;font-weight:400;letter-spacing:.02em;color:var(--fg)}
.hero h1 em{font-style:normal;color:var(--accent);font-weight:600;letter-spacing:-.01em}
.hero .lead{margin-top:30px;max-width:34em;font-size:clamp(14px,1.35vw,16.5px);line-height:1.95;color:var(--fg-2)}
.hero .lead b{color:var(--fg);font-weight:500}

.cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:42px}
.btn{
  position:relative;display:inline-flex;align-items:center;gap:14px;
  padding:16px 26px;border-radius:100px;font-size:13.5px;letter-spacing:.1em;
  transition:transform .5s var(--ease),background .45s ease,border-color .45s ease,box-shadow .45s ease,color .45s ease;
  will-change:transform;
}
.btn small{font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;opacity:.62;text-transform:uppercase}
.btn--solid{background:var(--btn-bg);color:var(--btn-fg);box-shadow:0 10px 40px -14px color-mix(in srgb,var(--fg) 50%,transparent)}
.btn--solid:hover{background:var(--fg);color:var(--bg);box-shadow:0 16px 50px -14px color-mix(in srgb,var(--accent) 70%,transparent)}
.btn--ghost{border:1px solid var(--line);color:var(--fg-2)}
.btn--ghost:hover{border-color:color-mix(in srgb,var(--accent) 40%,transparent);color:var(--fg);background:color-mix(in srgb,var(--accent) 5%,transparent)}

.hero-meta{display:flex;gap:clamp(20px,3vw,46px);margin-top:52px;padding-top:24px;border-top:1px solid var(--line-2);list-style:none}
.hero-meta li b{display:block;font-family:var(--mono);font-size:13px;letter-spacing:.06em;color:var(--fg);font-weight:400}
.hero-meta li span{display:block;margin-top:6px;font-size:10.5px;letter-spacing:.2em;color:var(--fg-3)}

/* Hero 舞台 */
.hero__stage{position:relative;display:flex;align-items:center;justify-content:center;min-height:clamp(420px,50vw,600px)}
.stage-glow{position:absolute;width:min(560px,86%);aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,color-mix(in srgb,var(--accent) 22%,transparent) 0%,color-mix(in srgb,var(--deep) 12%,transparent) 40%,transparent 68%);
  filter:blur(28px);z-index:0}
.stage-glow::after{content:"";position:absolute;inset:-14%;border-radius:50%;
  background:conic-gradient(from 0deg,transparent 0deg,color-mix(in srgb,var(--accent) 30%,transparent) 58deg,color-mix(in srgb,var(--warm) 10%,transparent) 118deg,transparent 200deg);
  filter:blur(26px);opacity:.55;animation:spin 30s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.orbits{position:absolute;width:min(620px,98%);aspect-ratio:1;z-index:0;opacity:.7;pointer-events:none}
.orbits span{position:absolute;inset:0;border-radius:50%;border:1px solid var(--line)}
.orbits .ring2{inset:9%;border:1px dashed color-mix(in srgb,var(--accent) 30%,transparent)}
.tilt{position:relative;z-index:2;transform-style:preserve-3d;
  transform:rotateY(calc(var(--ry,0) * 1deg)) rotateX(calc(var(--rx,0) * 1deg)) rotateZ(-1.2deg);
  transition:transform .9s var(--ease)}

/* 浏览器窗口 */
.window{
  width:min(540px,94vw);border-radius:16px;border:1px solid var(--line);
  background:linear-gradient(160deg,var(--bg-3),var(--bg-2));
  box-shadow:0 50px 90px -44px rgba(0,0,0,.8),inset 0 1px 0 rgba(255,255,255,.05);
  overflow:hidden;
}
[data-theme="light"] .window{box-shadow:0 50px 90px -50px rgba(20,24,22,.35),inset 0 1px 0 rgba(255,255,255,.6)}
.window__bar{display:flex;align-items:center;gap:12px;padding:11px 14px;border-bottom:1px solid var(--line-2);background:color-mix(in srgb,var(--bg-2) 80%,transparent)}
.win-dots{display:flex;gap:5px;flex:none}
.win-dots i{width:7px;height:7px;border-radius:50%;background:var(--line);box-shadow:inset 0 0 0 1px var(--line)}
.win-dots i:first-child{background:color-mix(in srgb,var(--warm) 70%,transparent)}
.window__url{
  flex:1;min-width:0;padding:4px 10px;border-radius:100px;background:var(--card-soft);
  font-family:var(--mono);font-size:9px;letter-spacing:.04em;color:var(--fg-3);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.window__ext{display:flex;align-items:center;gap:6px;font-family:var(--mono);font-size:8.5px;letter-spacing:.14em;color:var(--accent);flex:none}
.window__ext img{width:14px;height:14px;border-radius:4px}
.window__body{position:relative;padding:clamp(20px,3vw,30px) clamp(20px,3.4vw,34px) clamp(26px,3.6vw,38px)}
.fake-kicker{font-family:var(--mono);font-size:8px;letter-spacing:.28em;color:var(--accent);opacity:.85}
.fake-title{margin-top:8px;font-family:var(--serif);font-size:clamp(21px,2.4vw,29px);font-weight:600;letter-spacing:.01em;line-height:1.2;color:var(--fg)}
.fake-line{height:6px;margin-top:12px;border-radius:99px;background:var(--line);opacity:.8}
.fake-line.w92{width:92%}.fake-line.w88{width:88%}.fake-line.w86{width:86%}.fake-line.w78{width:78%}.fake-line.w64{width:64%}
.fake-sel{
  margin-top:18px;padding:8px 10px;border-left:2px solid var(--accent);border-radius:0 6px 6px 0;
  background:color-mix(in srgb,var(--accent) 12%,transparent);
  font-size:11.5px;line-height:1.6;color:var(--fg);
}
.fake-tr{margin-top:8px;padding-left:10px;border-left:2px solid color-mix(in srgb,var(--accent) 40%,transparent);
  font-size:11.5px;line-height:1.6;color:var(--fg-2);
  animation:trIn 5s var(--ease) infinite}
@keyframes trIn{0%,12%{opacity:0;transform:translateY(4px)}22%,88%{opacity:1;transform:none}100%{opacity:0}}
.fake-sel{animation:selPulse 5s ease-in-out infinite}
@keyframes selPulse{0%,10%{background:color-mix(in srgb,var(--accent) 12%,transparent)}20%,60%{background:color-mix(in srgb,var(--accent) 20%,transparent)}100%{background:color-mix(in srgb,var(--accent) 12%,transparent)}}

/* 划词气泡 */
.bubble{
  position:absolute;right:clamp(10px,2vw,20px);bottom:clamp(14px,2.2vw,22px);width:min(250px,62%);
  padding:12px 14px;border-radius:12px;border:1px solid color-mix(in srgb,var(--accent) 32%,transparent);
  background:color-mix(in srgb,var(--bg-2) 88%,transparent);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 26px 50px -22px rgba(0,0,0,.75);
  animation:bubbleIn .9s var(--ease) both,bubbleFloat 6s ease-in-out 1s infinite;
}
@keyframes bubbleIn{from{opacity:0;transform:translateY(10px) scale(.96)}to{opacity:1;transform:none}}
@keyframes bubbleFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.bubble__head{display:flex;align-items:center;gap:7px}
.bubble__head img{width:16px;height:16px;border-radius:4px}
.bubble__head b{font-family:var(--serif);font-size:11.5px;letter-spacing:.06em;font-weight:600}
.bubble__head span{margin-left:auto;font-family:var(--mono);font-size:7px;letter-spacing:.1em;color:var(--fg-3)}
.bubble__src{margin-top:9px;font-family:var(--mono);font-size:8.5px;line-height:1.6;color:var(--fg-3)}
.bubble__dst{margin-top:4px;font-size:11.5px;line-height:1.55;color:var(--accent)}
.bubble__foot{display:flex;justify-content:space-between;gap:8px;margin-top:10px;padding-top:8px;border-top:1px solid var(--line-2);
  font-family:var(--mono);font-size:6.5px;letter-spacing:.06em;color:var(--fg-3)}

.float-tag{
  position:absolute;z-index:3;font-family:var(--mono);font-size:9px;letter-spacing:.24em;
  padding:7px 13px;border:1px solid var(--line);border-radius:100px;color:var(--fg-3);
  background:color-mix(in srgb,var(--bg-2) 60%,transparent);backdrop-filter:blur(8px);
  text-transform:uppercase;animation:floaty 6s ease-in-out infinite;
}
.float-tag.t-a{top:12%;left:0}
.float-tag.t-b{top:46%;right:-1%;animation-delay:-2s}
.float-tag.t-c{bottom:13%;left:4%;animation-delay:-4s}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}

.scroll-hint{position:absolute;left:var(--pad);bottom:26px;z-index:3;display:flex;align-items:center;gap:10px}
.scroll-hint span{font-family:var(--mono);font-size:9px;letter-spacing:.32em;color:var(--fg-3)}
.scroll-hint i{display:block;width:1px;height:34px;background:linear-gradient(180deg,var(--accent),transparent);animation:drop 2.4s var(--ease) infinite}
@keyframes drop{0%{transform:scaleY(0);transform-origin:top}45%{transform:scaleY(1);transform-origin:top}55%{transform:scaleY(1);transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ============================================================
   5 · 跑马灯
   ============================================================ */
.marquee{position:relative;border-top:1px solid var(--line-2);border-bottom:1px solid var(--line-2);overflow:hidden;padding:20px 0;background:color-mix(in srgb,var(--bg-2) 60%,transparent)}
.marquee__track{display:flex;width:max-content;animation:slide 46s linear infinite}
.marquee__track span{display:inline-flex;align-items:center;gap:26px;padding-right:26px;
  font-family:var(--mono);font-size:11px;letter-spacing:.3em;color:var(--fg-3);text-transform:uppercase;white-space:nowrap}
.marquee__track b{color:var(--accent);font-weight:400}
.marquee__track em{width:4px;height:4px;border-radius:50%;background:var(--deep);font-style:normal}
@keyframes slide{to{transform:translateX(-50%)}}

/* ============================================================
   6 · 章节通用
   ============================================================ */
section{position:relative}
.sec{padding:clamp(80px,10vw,150px) 0}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:30px;padding-bottom:26px;border-bottom:1px solid var(--line-2);margin-bottom:clamp(44px,6vw,84px)}
.sec-head .idx{font-family:var(--mono);font-size:10px;letter-spacing:.3em;color:var(--accent);text-transform:uppercase}
.sec-head h2{font-family:var(--serif);font-weight:500;font-size:clamp(26px,3.4vw,44px);letter-spacing:.02em;margin-top:16px}
.sec-head p{max-width:26em;font-size:13.5px;line-height:1.9;color:var(--fg-3);text-align:right}

/* ============================================================
   7 · 宣言
   ============================================================ */
.manifesto{padding:clamp(90px,13vw,180px) 0;border-bottom:1px solid var(--line-2)}
.manifesto__in{max-width:1180px}
.manifesto .line{display:block;font-family:var(--serif);font-weight:500;
  font-size:clamp(30px,5.2vw,76px);line-height:1.28;letter-spacing:.01em;
  color:color-mix(in srgb,var(--fg) 13%,transparent);transition:color .8s var(--ease)}
.manifesto .line.on{color:var(--fg)}
.manifesto .line.on .hl{color:var(--accent)}
.manifesto .line .hl{transition:color .8s var(--ease)}
.manifesto p{margin-top:clamp(40px,5vw,72px);max-width:40em;font-size:15px;line-height:2.05;color:var(--fg-2)}
.manifesto p b{color:var(--fg);font-weight:500}

/* ============================================================
   8 · 三张截图
   ============================================================ */
.shots{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(20px,3vw,44px);align-items:start}
.shot{position:relative;min-width:0}
.shot:nth-child(2){margin-top:clamp(30px,5vw,72px)}
.shot:nth-child(3){margin-top:calc(clamp(30px,5vw,72px) * .42)}
.shot .stage{position:relative;display:flex;justify-content:center;padding:clamp(18px,2.4vw,30px) 0;
  background:radial-gradient(ellipse 62% 46% at 50% 44%,color-mix(in srgb,var(--deep) 30%,transparent),color-mix(in srgb,var(--deep) 6%,transparent) 58%,transparent 76%);
  transition:transform .8s var(--ease),background .8s ease}
.shot:hover .stage{transform:translateY(-10px);
  background:radial-gradient(ellipse 66% 48% at 50% 44%,color-mix(in srgb,var(--accent) 18%,transparent),color-mix(in srgb,var(--deep) 8%,transparent) 58%,transparent 78%)}
.browser{
  width:100%;max-width:430px;border-radius:12px;overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2);
  box-shadow:0 40px 70px -40px rgba(0,0,0,.8);
  transform:rotateY(calc(var(--ry,0) * 1deg)) rotateX(calc(var(--rx,0) * 1deg));
  transition:transform .7s var(--ease);
}
[data-theme="light"] .browser{box-shadow:0 34px 60px -42px rgba(20,24,22,.35)}
.browser__bar{display:flex;align-items:center;gap:9px;padding:8px 11px;border-bottom:1px solid var(--line-2);background:color-mix(in srgb,var(--bg-3) 70%,transparent)}
.browser__bar .win-dots i{width:5px;height:5px}
.browser__url{flex:1;min-width:0;padding:3px 8px;border-radius:99px;background:var(--card-soft);
  font-family:var(--mono);font-size:7px;letter-spacing:.03em;color:var(--fg-3);
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.browser img{width:100%;height:auto;background:#0a0d0c}
[data-theme="light"] .browser img{background:#f7f4ec}
.shot figcaption{margin-top:20px;padding-top:16px;border-top:1px solid var(--line-2)}
.shot .cap-top{display:flex;align-items:baseline;gap:12px}
.shot figcaption .idx{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--accent)}
.shot figcaption h3{font-family:var(--serif);font-size:16px;font-weight:600;letter-spacing:.06em}
.shot figcaption p{display:block;margin-top:8px;font-size:12.5px;line-height:1.8;color:var(--fg-3)}

/* ============================================================
   9 · Bento 功能卡片
   ============================================================ */
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-2);border:1px solid var(--line-2)}
.card{position:relative;background:var(--bg-2);padding:clamp(26px,3vw,42px);overflow:hidden;transition:background .6s ease}
.card:hover{background:var(--bg-3)}
.card::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .6s ease;
  background:radial-gradient(420px 300px at var(--mx,50%) var(--my,0%),color-mix(in srgb,var(--accent) 10%,transparent),transparent 70%)}
.card:hover::after{opacity:1}
.card .num{font-family:var(--mono);font-size:10px;letter-spacing:.24em;color:var(--fg-3)}
.card h3{margin-top:26px;font-family:var(--serif);font-size:clamp(19px,1.8vw,25px);font-weight:600;letter-spacing:.04em}
.card p{margin-top:14px;font-size:13px;line-height:1.95;color:var(--fg-2)}
.card .big{font-family:var(--serif);font-size:clamp(46px,6vw,84px);font-weight:600;line-height:1;color:var(--accent);letter-spacing:-.03em}
.card .big small{font-size:.3em;letter-spacing:.1em;color:var(--fg-3);font-weight:400;margin-left:.36em}
.card--wide{grid-column:span 2}
.card--rank{display:flex;flex-direction:column;justify-content:space-between;gap:26px}
.card__hint{margin-top:14px;font-family:var(--mono);font-size:8.5px;letter-spacing:.12em;color:var(--fg-3);text-transform:uppercase}
.card__keys{list-style:none;margin-top:20px;display:grid;gap:9px}
.card__keys li{display:flex;align-items:center;gap:5px;font-size:12px;color:var(--fg-2)}
.card__keys li span{margin-left:auto;font-family:var(--mono);font-size:9px;letter-spacing:.06em;color:var(--fg-3)}
.card__keys kbd{padding:2px 6px;border:1px solid var(--line);border-radius:5px;background:var(--card-soft);font-size:9px;color:var(--fg-2)}

/* ============================================================
   10 · 数字块
   ============================================================ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line-2);border:1px solid var(--line-2);
  box-shadow:0 40px 90px -50px rgba(0,0,0,.8)}
.stat{background:var(--stat-bg);padding:clamp(34px,5vw,66px) clamp(18px,2vw,34px);text-align:left;color:var(--stat-fg)}
.stat b{display:block;font-family:var(--serif);font-size:clamp(36px,4.6vw,64px);font-weight:600;line-height:1;letter-spacing:-.03em;color:var(--stat-fg)}
.stat span{display:block;margin-top:16px;font-size:10.5px;letter-spacing:.24em;color:color-mix(in srgb,var(--stat-fg) 62%,transparent);text-transform:uppercase;font-family:var(--mono)}
.stat:nth-child(2) b,.stat:nth-child(3) b{color:color-mix(in srgb,var(--stat-fg) 46%,transparent)}

/* ============================================================
   11 · FAQ
   ============================================================ */
.faq{border-top:1px solid var(--line-2)}
.faq__item{border-bottom:1px solid var(--line-2)}
.faq__item summary{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 0;list-style:none;cursor:pointer;
  font-family:var(--serif);font-size:clamp(17px,1.9vw,23px);letter-spacing:.03em;font-weight:600;
  transition:color .3s ease,padding-left .4s var(--ease);
}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary:hover{color:var(--accent);padding-left:6px}
.faq__ico{position:relative;width:14px;height:14px;flex:none}
.faq__ico::before,.faq__ico::after{content:"";position:absolute;left:0;top:50%;width:14px;height:1px;background:currentColor;transition:transform .4s var(--ease)}
.faq__ico::after{transform:rotate(90deg)}
.faq__item[open] .faq__ico::after{transform:rotate(0)}
.faq__item[open] .faq__ico{color:var(--accent)}
.faq__a{padding:0 0 26px;max-width:62em;animation:faqIn .5s var(--ease)}
.faq__a p{font-size:13.5px;line-height:2;color:var(--fg-2)}
.faq__a code{padding:1px 5px;border:1px solid var(--line);border-radius:4px;background:var(--card-soft);font-size:12px;color:var(--accent)}
@keyframes faqIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:none}}

/* ============================================================
   12 · 文档
   ============================================================ */
.docs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.doc-card{
  display:flex;flex-direction:column;padding:30px 28px 26px;border:1px solid var(--line);
  border-radius:18px;background:var(--card-soft);overflow:hidden;
  transition:transform .55s var(--ease),border-color .45s ease,background .45s ease,box-shadow .45s ease;
}
.doc-card:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--accent) 42%,transparent);background:color-mix(in srgb,var(--accent) 5%,transparent);
  box-shadow:0 30px 70px -40px color-mix(in srgb,var(--accent) 40%,transparent)}
.doc-card__os{font-family:var(--mono);font-size:9.5px;letter-spacing:.24em;color:var(--accent);text-transform:uppercase}
.doc-card h3{font-family:var(--serif);font-size:clamp(22px,2.2vw,28px);font-weight:600;letter-spacing:.02em;margin-top:16px}
.doc-card ol{margin:18px 0 0;padding:0;list-style:none;counter-reset:step;display:grid;gap:11px}
.doc-card ol li{position:relative;padding-left:26px;font-size:12.5px;line-height:1.75;color:var(--fg-2);counter-increment:step}
.doc-card ol li::before{content:"0" counter(step);position:absolute;left:0;top:1px;font-family:var(--mono);font-size:8.5px;letter-spacing:.06em;color:var(--accent)}
.doc-card code{font-family:var(--mono);font-size:11px;color:var(--fg)}
.doc-card__go{display:inline-flex;align-items:center;gap:8px;margin-top:auto;padding-top:22px;
  font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--fg);transition:color .3s ease}
.doc-card__go span{transition:transform .4s var(--ease)}
.doc-card:hover .doc-card__go{color:var(--accent)}
.doc-card:hover .doc-card__go span{transform:translateY(3px)}
.doc-card.is-off{opacity:.55}
.doc-card.is-off:hover{transform:none;border-color:var(--line);background:var(--card-soft);box-shadow:none}
.doc-card__go.is-off{color:var(--fg-3)}
.docs-note{margin-top:28px;max-width:44em;font-size:12px;line-height:1.9;color:var(--fg-3)}

/* ============================================================
   13 · 更新日志
   ============================================================ */
.log{list-style:none;border-top:1px solid var(--line-2)}
.log > li{display:grid;grid-template-columns:180px 1fr;gap:clamp(18px,4vw,60px);
  padding:clamp(26px,3vw,38px) 0;border-bottom:1px solid var(--line-2);position:relative}
.log > li::before{content:"";position:absolute;left:0;top:0;width:26px;height:1px;background:var(--accent);opacity:.7}
.log__side{display:flex;flex-direction:column;gap:8px}
.log__side b{font-family:var(--serif);font-size:clamp(22px,2.2vw,30px);font-weight:600;letter-spacing:.02em;color:var(--fg)}
.log__side span{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;color:var(--fg-3)}
.log__body h3{font-family:var(--serif);font-size:clamp(17px,1.7vw,21px);font-weight:600;letter-spacing:.03em}
.log__body ul{list-style:none;margin-top:14px;display:grid;gap:7px}
.log__body ul li{font-size:13px;line-height:1.85;color:var(--fg-2);padding-left:16px;position:relative;border:0;display:block}
.log__body ul li::before{content:"";position:absolute;left:0;top:.82em;width:5px;height:1px;background:var(--accent)}

/* ============================================================
   14 · 下载区
   ============================================================ */
.dl{padding:clamp(90px,12vw,170px) 0;text-align:center;position:relative;overflow:hidden;border-top:1px solid var(--line-2)}
.dl::before{content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:min(900px,120vw);aspect-ratio:1;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,color-mix(in srgb,var(--deep) 34%,transparent) 0%,transparent 62%);filter:blur(40px)}
.dl .wrap{position:relative;z-index:2}
.dl h2{font-size:clamp(34px,5.4vw,76px);letter-spacing:.01em}
.dl > .wrap > p:not(.mono):not(.dl-note):not(.dl-detect):not(.hash){margin:26px auto 0;max-width:34em;font-size:14px;line-height:2;color:var(--fg-2)}
.dl-actions{display:flex;flex-direction:column;align-items:center;gap:16px;margin-top:44px}
.dl-doc{padding:13px 22px;font-size:12.5px}
.dl .btn--primary{
  margin-top:4px;padding:20px 40px 20px 26px;font-size:16.5px;border-radius:100px;min-width:min(430px,100%);
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:var(--on-accent);border:1px solid color-mix(in srgb,var(--accent) 70%,transparent);
  box-shadow:0 22px 60px -20px color-mix(in srgb,var(--accent) 65%,transparent),inset 0 1px 0 rgba(255,255,255,.32);
  justify-content:center;
}
.dl .btn--primary:hover{transform:translateY(-2px);
  box-shadow:0 32px 80px -22px color-mix(in srgb,var(--accent) 80%,transparent),inset 0 1px 0 rgba(255,255,255,.4)}
.dl-btn__ico{display:grid;place-items:center;width:40px;height:40px;border-radius:50%;background:var(--on-accent-soft);flex:none}
.dl-btn__ico svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.dl-btn__txt{display:flex;flex-direction:column;align-items:flex-start;gap:3px;font-weight:600;letter-spacing:.12em}
.dl-btn__txt small{font-family:var(--mono);font-size:8.5px;letter-spacing:.12em;opacity:.66;font-weight:400;text-transform:uppercase}
.dl-detect{margin-top:4px;font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;color:var(--fg-3);min-height:1.6em}
.dl-detect b{color:var(--accent);font-weight:400}
.dl-manual{font-family:var(--mono);font-size:9px;letter-spacing:.16em;color:var(--fg-3);border-bottom:1px solid var(--line);padding-bottom:2px;transition:color .3s ease,border-color .3s ease}
.dl-manual:hover{color:var(--accent);border-color:var(--accent)}

.dlgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;max-width:980px;margin:46px auto 0}
.dlcard{position:relative;display:block;text-align:left;padding:28px 26px 24px;border:1px solid var(--line);
  border-radius:18px;background:var(--card-soft);overflow:hidden;
  transition:transform .55s var(--ease),border-color .45s ease,background .45s ease,box-shadow .45s ease}
.dlcard:hover{transform:translateY(-4px);border-color:color-mix(in srgb,var(--accent) 42%,transparent);background:color-mix(in srgb,var(--accent) 6%,transparent);
  box-shadow:0 30px 70px -40px color-mix(in srgb,var(--accent) 45%,transparent)}
.dlcard.on{border-color:color-mix(in srgb,var(--accent) 55%,transparent);background:color-mix(in srgb,var(--accent) 10%,transparent)}
.dlcard.on::after{content:"当前浏览器";position:absolute;right:18px;top:18px;font-family:var(--mono);font-size:7.5px;letter-spacing:.14em;color:var(--on-accent);
  background:var(--accent);padding:3px 7px;border-radius:100px}
.dlcard__os{display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.24em;color:var(--accent);text-transform:uppercase}
.dlcard b{display:block;margin-top:18px;font-family:var(--serif);font-size:clamp(21px,2.2vw,28px);font-weight:600;letter-spacing:.01em;color:var(--fg);line-height:1.2}
.dlcard small{display:block;margin-top:12px;font-family:var(--mono);font-size:9px;letter-spacing:.1em;color:var(--fg-3);text-transform:uppercase;line-height:1.7}
.dlcard__go{position:absolute;right:24px;bottom:24px;font-family:var(--mono);font-size:13px;color:var(--fg-3);
  transition:transform .5s var(--ease),color .4s ease}
.dlcard:hover .dlcard__go{transform:translateY(3px);color:var(--accent)}
.dlcard.is-off{opacity:.5;cursor:not-allowed;border-style:dashed}
.dlcard.is-off:hover{transform:none;border-color:var(--line);background:var(--card-soft);box-shadow:none}
.dl-note{max-width:38em;margin:30px auto 0;font-size:12px;line-height:1.95;color:var(--fg-3)}
.dl-note b{color:var(--fg-2);font-weight:500}
.hash{margin-top:24px;font-family:var(--mono);font-size:10px;line-height:1.9;letter-spacing:.08em;color:var(--fg-3);word-break:break-all}
.hash b{display:inline-block;margin-right:.8em;color:var(--accent);font-weight:400;letter-spacing:.16em}

/* ============================================================
   15 · 页脚
   ============================================================ */
.foot{border-top:1px solid var(--line-2);padding:46px 0 34px}
.foot__in{display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap}
.foot__in .brand b{font-size:15px}
.foot nav{display:flex;gap:24px;flex-wrap:wrap}
.foot nav a{font-size:12px;letter-spacing:.12em;color:var(--fg-3);transition:color .3s ease}
.foot nav a:hover{color:var(--fg)}
.foot__legal{width:100%;margin-top:34px;padding-top:22px;border-top:1px solid var(--line-2);display:grid;gap:10px}
.foot__line{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;
  font-size:10.5px;line-height:1.8;letter-spacing:.04em;color:color-mix(in srgb,var(--fg) 30%,transparent)}
.foot__privacy{max-width:62em}
.foot__repo{font-family:var(--mono);font-size:9.5px;letter-spacing:.12em;color:var(--fg-3);transition:color .3s ease;white-space:nowrap}
.foot__repo:hover{color:var(--accent)}

/* ============================================================
   16 · 浏览器选择弹窗
   ============================================================ */
.modal{position:fixed;inset:0;z-index:300;display:grid;place-items:center;padding:22px;
  visibility:hidden;opacity:0;transition:opacity .35s ease,visibility .35s}
.modal.on{visibility:visible;opacity:1}
.modal__mask{position:absolute;inset:0;background:rgba(3,5,4,.72);backdrop-filter:blur(8px)}
[data-theme="light"] .modal__mask{background:rgba(20,24,22,.4)}
.modal__panel{position:relative;width:min(460px,100%);padding:30px 28px 24px;border:1px solid var(--line);
  border-radius:18px;background:var(--bg-2);box-shadow:0 50px 100px -50px rgba(0,0,0,.9);
  transform:translateY(10px);transition:transform .4s var(--ease)}
.modal.on .modal__panel{transform:none}
.modal__panel .mono{font-size:9px;color:var(--accent)}
.modal__panel h3{margin-top:12px;font-family:var(--serif);font-size:25px;font-weight:600;letter-spacing:.02em}
.modal__desc{margin-top:10px;font-size:12.5px;line-height:1.8;color:var(--fg-3)}
.modal__list{display:grid;gap:10px;margin-top:22px}
.modal__list button{display:grid;grid-template-columns:1fr auto;align-items:center;gap:4px 12px;
  padding:14px 16px;border:1px solid var(--line);border-radius:12px;text-align:left;
  background:var(--card-soft);transition:border-color .35s ease,background .35s ease,transform .35s var(--ease)}
.modal__list button:hover:not(:disabled){border-color:color-mix(in srgb,var(--accent) 50%,transparent);
  background:color-mix(in srgb,var(--accent) 7%,transparent);transform:translateY(-2px)}
.modal__list button:disabled{opacity:.42;cursor:not-allowed}
.modal__name{font-family:var(--serif);font-size:17px;font-weight:600;letter-spacing:.04em}
.modal__meta{grid-column:1;font-family:var(--mono);font-size:8.5px;letter-spacing:.08em;color:var(--fg-3)}
.modal__go{grid-column:2;grid-row:1 / span 2;font-family:var(--mono);font-size:14px;color:var(--accent)}
.modal__close{margin-top:18px;width:100%;padding:10px;border:1px solid var(--line);border-radius:100px;
  font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;color:var(--fg-3);transition:color .3s ease,border-color .3s ease}
.modal__close:hover{color:var(--fg);border-color:var(--fg-3)}

/* ============================================================
   17 · 动效
   ============================================================ */
[data-reveal]{opacity:0;transform:translateY(30px);filter:blur(6px);
  transition:opacity 1.1s var(--ease),transform 1.1s var(--ease),filter 1.1s var(--ease);
  transition-delay:var(--d,0ms)}
[data-reveal].in{opacity:1;transform:none;filter:none}

/* 自定义环形光标 */
.ring{position:fixed;left:0;top:0;width:26px;height:26px;margin:-13px 0 0 -13px;border-radius:50%;
  border:1px solid color-mix(in srgb,var(--fg) 55%,transparent);z-index:150;pointer-events:none;
  transition:width .35s var(--ease),height .35s var(--ease),margin .35s var(--ease),background .35s ease,border-color .35s ease,opacity .3s;
  mix-blend-mode:difference}
.ring.big{width:62px;height:62px;margin:-31px 0 0 -31px;background:color-mix(in srgb,var(--fg) 90%,transparent);border-color:transparent}
@media (hover:none){.ring{display:none}}

/* ============================================================
   18 · 自适应
   ============================================================ */
@media (max-width:1100px){
  .hero-grid{grid-template-columns:1fr;gap:clamp(34px,6vw,58px)}
  .hero__stage{order:-1;min-height:auto;padding-top:10px}
  .hero h1{font-size:clamp(42px,8vw,76px)}
  .hero-meta{margin-top:38px}
  .shots{grid-template-columns:1fr;gap:52px}
  .shot:nth-child(2),.shot:nth-child(3){margin-top:0}
  .bento{grid-template-columns:1fr 1fr}
  .card--wide{grid-column:span 2}
  .stats{grid-template-columns:1fr 1fr}
  .docs{grid-template-columns:1fr 1fr}
  .docs .doc-card:last-child{grid-column:span 2}
  .sec-head{flex-direction:column;align-items:flex-start;gap:16px}
  .sec-head p{text-align:left}
  .log li{grid-template-columns:140px 1fr}
}
@media (max-width:860px){
  .nav__links{display:none}
  .side{display:none}
  .brand s{display:none}
}
@media (max-width:720px){
  .nav{height:66px}
  .nav__cta{padding:8px 13px;font-size:11px}
  .theme{padding:2px}
  .theme > button{width:23px;height:23px}
  .hero{padding-top:96px}
  .hero__stage{min-height:400px}
  .window{width:min(480px,100%)}
  .bubble{position:relative;right:auto;bottom:auto;width:100%;margin-top:18px;animation:bubbleIn .9s var(--ease) both}
  .hero .lead{margin-top:24px}
  .cta{margin-top:32px;gap:10px}
  .btn{padding:14px 20px;font-size:12.5px}
  .hero-meta{gap:22px;flex-wrap:wrap}
  .bento{grid-template-columns:1fr}
  .card--wide{grid-column:span 1}
  .stats{grid-template-columns:1fr 1fr}
  .docs{grid-template-columns:1fr}
  .docs .doc-card:last-child{grid-column:span 1}
  .log li{grid-template-columns:1fr;gap:12px}
  .log__side{flex-direction:row;align-items:baseline;gap:14px}
  .dlgrid{grid-template-columns:1fr;gap:12px}
  .dlcard{padding:24px 22px 22px}
  .dlcard__go{right:22px;bottom:22px}
  .dl-actions{margin-top:34px}
  .dl .btn--primary{min-width:100%;padding:17px 22px 17px 20px;font-size:15px}
  .dl-btn__ico{width:36px;height:36px}
  .foot__in{flex-direction:column;align-items:flex-start}
  .float-tag{display:none}
  .scroll-hint{display:none}
  .manifesto .line{line-height:1.42}
  .theme__pop{right:-58px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition-duration:.001ms!important}
  [data-reveal]{opacity:1;transform:none;filter:none}
  html{scroll-behavior:auto}
}