/* ==========================================================================
   AIxBIO 官网样式  ·  Light / Dark 双主题（V2 主题化）
   ---------------------------------------------------------------------------
   设计原则：
   - 单强调色纪律：每套主题保留 1 个主色（teal/cyan）+ 1 个 data 强调色（橙）
   - 不堆卡片、不靠边框拉层次；靠字号与留白
   - 颜色集中在 :root 的语义 token；旧变量名（--void/--line/--paper...）作为
     别名层引用语义 token，全文件 0 改动兼容
   - Light 主视觉：白底 + 深藏青字 + teal/cyan 主色 + 少量橙色
   - Dark 视觉：PPT 母版原值（#060A12 深空底 + #2FD9A0 薄荷绿单强调）
   - 图片双轨：同一图位用 <div class="art-stack"> 叠加 dark/light 两张图，
     按 [data-theme] 用 opacity 切换 + 350ms crossfade
   ========================================================================== */

:root{
  /* ---------- 语义 token（Light，默认主视觉）---------- */
  --background:#FFFFFF;          /* 纯白，与 light 图片白色背景融为一体 */
  --surface:#FFFFFF;             /* 浅区卡片底（= 背景，不抬高） */
  --surface-2:#F4F7FB;           /* 极浅冷灰，用于微区段区分（极少用） */
  --surface-3:#EBF1F7;           /* 更浅的灰，备用 */
  --border:#E2E8F0;              /* 主分隔线：浅灰蓝 */
  --border-strong:#CBD5E1;       /* 强调分隔 */

  --text-primary:#0F1E2E;        /* 深藏青：标题/正文主 */
  --text-secondary:#334155;      /* 次级文字 */
  --text-muted:#64748B;          /* 辅助文字 */
  --text-faint:#94A3B8;          /* 极辅助（mono 标签等） */

  --accent:#0E7A5A;              /* 深 teal（Light AA 对比 4.95:1） */
  --accent-bright:#0BB586;       /* 亮 teal（按钮、悬浮发光） */
  --accent-dim:#0A5C44;          /* 更深 teal（hover/强调） */
  --accent-soft:rgba(14,122,90,.10);  /* 选中态底色 */

  --data:#C2410C;                /* 深橙：AA 5.3:1 用于「信息流/数据驱动」标签 */
  --data-bright:#EA580C;

  --brand:#012DAA;               /* 品牌蓝（极少用） */
  --on-accent:#FFFFFF;           /* 主按钮文字色（白底深 teal 按钮） */

  /* 主题元信息：原生控件 / 滚动条 / form */
  color-scheme:light;

  /* ---------- 字体与版式 token ---------- */
  --display:"Archivo","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --body:"Noto Sans SC","Archivo","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,consolas,monospace;

  --maxw:1280px;
  --wide:1520px;
  --gutter:clamp(24px,5vw,72px);
  --nav-h:72px;

  /* ---------- 旧变量名别名（兼容层，勿再新增使用）---------- */
  --void:var(--background);
  --line:var(--border);
  --line-2:var(--border-strong);
  --paper:var(--text-primary);
  --paper-2:var(--text-secondary);
  --muted:var(--text-muted);
  --muted-2:var(--text-faint);
}

/* ---------- Dark 主题覆盖（[data-theme="dark"] 启用）---------- */
[data-theme="dark"]{
  --background:#060A12;
  --surface:#0B121D;
  --surface-2:#101A29;
  --surface-3:#16223A;
  --border:#1A2536;
  --border-strong:#243349;

  --text-primary:#EDF2F8;
  --text-secondary:#C3D0DE;
  --text-muted:#7E8FA3;
  --text-faint:#5A6B7E;

  --accent:#2FD9A0;
  --accent-bright:#2FD9A0;
  --accent-dim:#1D9E75;
  --accent-soft:rgba(47,217,160,.10);

  --data:#F2A93B;
  --data-bright:#F2A93B;

  --on-accent:#060A12;

  color-scheme:dark;
}

/* 全局过渡：换主题时颜色 / 边框平滑切换（避免生硬跳变） */
:root{
  --theme-transition:background-color .35s ease,
                     color .35s ease,
                     border-color .35s ease,
                     fill .35s ease,
                     stroke .35s ease,
                     box-shadow .35s ease;
}
body,section,header,footer,.nav,.band,.auth-card,.auth-modal,.hero-bg::after,
.feature-bg::after,.phead-bg::after,.row,.paper,.paper *,.feed-item,.tbl *{
  transition:var(--theme-transition);
}
@media(prefers-reduced-motion:reduce){
  :root{--theme-transition:none}
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--background);color:var(--text-secondary);
  font-family:var(--body);font-size:16px;line-height:1.8;letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}
::selection{background:var(--accent);color:var(--on-accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}

h1,h2,h3,h4{margin:0;color:var(--text-primary);font-weight:900;line-height:1.22;
  letter-spacing:-.015em;text-wrap:balance}
p{margin:0;text-wrap:pretty}
.wrap{max-width:var(--maxw);margin:0 auto;padding-inline:var(--gutter)}
.wrap-wide{max-width:var(--wide);margin:0 auto;padding-inline:var(--gutter)}

/* 版式尺度 —— 靠字号和留白拉开层次，不靠边框 */
.h-xl{font-size:clamp(38px,6.4vw,88px);line-height:1.08;letter-spacing:-.035em}
.h-lg{font-size:clamp(28px,4.4vw,56px);line-height:1.16;letter-spacing:-.025em}
.h-md{font-size:clamp(22px,2.8vw,34px);line-height:1.28}
.h-sm{font-size:clamp(18px,1.9vw,22px);line-height:1.4;font-weight:700}
.body-lg{font-size:clamp(16px,1.5vw,20px);line-height:1.85;color:var(--text-muted)}
.body{font-size:15.5px;line-height:1.85;color:var(--text-muted)}
.small{font-size:13.5px;line-height:1.7;color:var(--text-muted)}
.kicker{font-family:var(--mono);font-size:11.5px;letter-spacing:.2em;
  text-transform:uppercase;color:var(--accent);font-weight:500}
.kicker.data{color:var(--data)}
.en{font-family:var(--display);font-weight:700}
.mono{font-family:var(--mono)}
.max-60{max-width:62ch}
.max-48{max-width:50ch}

section{position:relative}
.pad{padding-block:clamp(76px,10vw,152px)}
.pad-sm{padding-block:clamp(56px,7vw,100px)}
/* band：Light 用极浅冷灰；Dark 用稍亮的深色。section.band 不与 light 图片白色 bg 冲突 */
.band{background:var(--surface-2)}
.hr{height:1px;background:var(--border);border:0;margin:0}

/* ==========================================================================
   图片双轨：art-stack 容器 + 两张图叠加
   - Dark 默认显示 .art-dark；Light 显示 .art-light
   - 350ms crossfade；prefers-reduced-motion 立即切换
   ========================================================================== */
.art-stack{position:relative;display:block;overflow:hidden}
.art-stack .art{position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;transition:opacity 350ms ease;opacity:0}
.art-stack .art-dark{opacity:1}
.art-stack .art-light{opacity:0}
[data-theme="light"] .art-stack .art-dark{opacity:0}
[data-theme="light"] .art-stack .art-light{opacity:1}
@media(prefers-reduced-motion:reduce){
  .art-stack .art{transition:none}
}

/* 兼容：原 <img> 单图（不带 .art-stack）。若未升级，则 Dark 仍展示原图，
   Light 隐藏整图（避免暗图浮在浅底上的违和感） */
.art-solo-dark{display:block}
[data-theme="light"] .art-solo-dark{display:none}

/* hero-bg / feature-bg / phead-bg：原 .hero-bg>img 模式升级为 .art-stack */
/* 让 .hero-bg / .feature-bg / .phead-bg 也支持双图（图片直接子元素） */
.hero-bg,.feature-bg,.phead-bg{position:absolute;inset:0;z-index:0;overflow:hidden}
.hero-bg .art,.feature-bg .art,.phead-bg .art{position:absolute;inset:0;width:100%;height:100%;
  object-fit:cover;transition:opacity 350ms ease;opacity:0}
.hero-bg .art-dark,.feature-bg .art-dark,.phead-bg .art-dark{opacity:1}
.hero-bg .art-light,.feature-bg .art-light,.phead-bg .art-light{opacity:0}
[data-theme="light"] .hero-bg .art-dark,
[data-theme="light"] .feature-bg .art-dark,
[data-theme="light"] .phead-bg .art-dark{opacity:0}
[data-theme="light"] .hero-bg .art-light,
[data-theme="light"] .feature-bg .art-light,
[data-theme="light"] .phead-bg .art-light{opacity:1}

/* ==========================================================================
   导航
   ========================================================================== */
.nav{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.82);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:border-color .25s,background-color .35s}
[data-theme="dark"] .nav{background:rgba(6,10,18,.82)}
.nav.stuck{border-bottom-color:var(--border)}
.nav-in{max-width:var(--wide);margin:0 auto;padding:0 var(--gutter);height:var(--nav-h);
  display:flex;align-items:center;gap:36px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand img{height:22px;width:auto}          /* 原比例 4.42:1，禁拉伸 */
.brand b{font-size:14px;color:var(--text-muted);font-weight:400;letter-spacing:.14em;
  padding-left:12px;border-left:1px solid var(--border-strong);white-space:nowrap}
.nav-drawer{display:flex;align-items:center;margin-left:auto}
.nav-main{display:flex;gap:4px;align-items:center}
.nav-main a{font-size:15.5px;font-weight:400;color:var(--text-muted);padding:8px 14px;
  border-radius:6px;transition:color .2s;white-space:nowrap;letter-spacing:.02em}
.nav-main a:hover{color:var(--text-primary)}
.nav-main a.on{color:var(--text-primary);font-weight:500}
.nav-side{display:flex;align-items:center;gap:10px;flex:none;margin-left:16px;padding-left:16px;
  border-left:1px solid var(--border)}
.nav-cta{font-size:15px;color:var(--text-secondary);padding:8px 18px;border-radius:7px;
  border:1px solid var(--border-strong);transition:color .2s,border-color .2s;white-space:nowrap}
.nav-cta:hover{color:var(--accent);border-color:var(--accent)}
.nav-login{font-family:var(--mono);font-size:13px;color:var(--text-muted);padding:7px 9px;
  border-radius:5px;transition:color .2s;white-space:nowrap}
.nav-login:hover{color:var(--text-primary)}
.nav-user{font-family:var(--mono);font-size:13px;color:var(--text-muted);padding:7px 9px}
.nav-user b{color:var(--accent);font-weight:500;margin-right:2px}
.nav-user a{color:var(--text-faint);text-decoration:underline;text-underline-offset:3px}
.nav-user a:hover{color:var(--text-primary)}
.nav-user .nav-user-admin{color:var(--accent);margin-right:10px;text-decoration:none}

/* ---------- 主题切换按钮（太阳 / 月亮）---------- */
.theme-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:8px;background:none;
  border:1px solid var(--border-strong);color:var(--text-muted);
  cursor:pointer;padding:0;transition:color .2s,border-color .2s,background-color .2s;
  flex:none;
}
.theme-toggle:hover{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}
.theme-toggle svg{width:17px;height:17px;display:block}
.theme-toggle .icon-sun,.theme-toggle .icon-moon{display:none}
[data-theme="light"] .theme-toggle .icon-sun{display:block}
[data-theme="light"] .theme-toggle .icon-moon{display:none}
[data-theme="dark"]  .theme-toggle .icon-sun{display:none}
[data-theme="dark"]  .theme-toggle .icon-moon{display:block}
.theme-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ==========================================================================
   登录/注册浮窗
   ========================================================================== */
.auth-modal{position:fixed;inset:0;z-index:200;display:grid;place-items:center;
  background:rgba(2,5,10,.45);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);padding:20px}
[data-theme="dark"] .auth-modal{background:rgba(2,5,10,.72)}
.auth-modal[hidden]{display:none}
.auth-card{width:min(380px,100%);background:var(--background);border:1px solid var(--border-strong);
  border-radius:14px;padding:28px 26px 24px;position:relative;
  box-shadow:0 32px 80px rgba(15,30,46,.10)}
[data-theme="dark"] .auth-card{box-shadow:0 32px 80px rgba(0,0,0,.6)}
.auth-x{position:absolute;top:12px;right:14px;background:none;border:0;color:var(--text-muted);
  font-size:22px;cursor:pointer;line-height:1;padding:2px 6px}
.auth-x:hover{color:var(--text-primary)}
.auth-brand{font-family:var(--mono);font-size:11.5px;letter-spacing:.22em;color:var(--accent)}
.auth-brand span{color:var(--text-faint);margin-left:8px}
.auth-tabs{display:flex;gap:6px;margin:16px 0 18px;border-bottom:1px solid var(--border)}
.auth-tab{flex:1;background:none;border:0;border-bottom:2px solid transparent;
  color:var(--text-muted);font:inherit;font-size:14px;padding:9px 0;cursor:pointer;
  margin-bottom:-1px;transition:color .2s,border-color .2s}
.auth-tab:hover{color:var(--text-primary)}
.auth-tab.on{color:var(--text-primary);border-bottom-color:var(--accent)}
.auth-form{display:flex;flex-direction:column;gap:12px}
.auth-form[hidden]{display:none}
.auth-form label{display:block;font-size:12px;color:var(--text-muted)}
.auth-form input{width:100%;margin-top:5px;background:var(--surface-2);color:var(--text-primary);
  border:1px solid var(--border-strong);border-radius:7px;padding:9px 12px;font:inherit;font-size:14px}
.auth-form input:focus{border-color:var(--accent);outline:none}
.auth-err{background:rgba(229,72,77,.12);border:1px solid rgba(229,72,77,.4);
  color:#C53030;border-radius:7px;padding:8px 12px;font-size:12.5px}
[data-theme="dark"] .auth-err{color:#F1A6A9}
.auth-submit{margin-top:4px;background:var(--accent);color:var(--on-accent);border:0;
  border-radius:8px;padding:11px;font:inherit;font-size:14.5px;font-weight:500;
  cursor:pointer;transition:filter .15s}
.auth-submit:hover{filter:brightness(1.08)}
.auth-submit:disabled{opacity:.55;cursor:wait}
.auth-note{font-size:11.5px;color:var(--text-faint);margin:0}
.auth-method-row{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 16px}
.auth-chip{display:inline-flex;align-items:center;gap:6px;background:none;
  border:1px solid var(--border-strong);border-radius:99px;color:var(--text-muted);font:inherit;
  font-size:12px;padding:5px 12px;cursor:pointer;transition:color .2s,border-color .2s}
.auth-chip:not(:disabled):hover{color:var(--text-primary)}
.auth-chip.on{color:var(--text-primary);border-color:var(--accent);background:var(--accent-soft)}
.auth-chip:disabled{opacity:.4;cursor:not-allowed}
.am-ico{font-size:12px;line-height:1}
.am-tag{font-family:var(--mono);font-size:9px;letter-spacing:.06em;color:var(--accent);
  border:1px solid rgba(14,122,90,.35);border-radius:99px;padding:1px 7px}
[data-theme="dark"] .am-tag{border-color:rgba(47,217,160,.35)}
.auth-code-row{display:flex;gap:8px}
.auth-code-row input{flex:1;margin-top:0!important}
.auth-code-row input::placeholder{color:var(--text-faint)}
.auth-send{flex:none;background:var(--surface-2);color:var(--text-secondary);border:1px solid var(--border-strong);
  border-radius:7px;padding:9px 14px;font:inherit;font-size:12.5px;cursor:pointer;
  transition:color .2s,border-color .2s;white-space:nowrap}
.auth-send:not(:disabled):hover{color:var(--accent);border-color:var(--accent)}
.auth-send:disabled{opacity:.5;cursor:wait}
.auth-agree{display:flex!important;align-items:center;gap:8px;font-size:12.5px!important;
  color:var(--text-muted);cursor:pointer;margin:0}
.auth-agree input{width:auto!important;margin:0!important;accent-color:var(--accent)}
.auth-agree a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
.auth-card--wide{width:min(560px,100%);max-height:86vh;display:flex;flex-direction:column}
.privacy-title{margin:10px 0 12px;font-size:17px;color:var(--text-primary)}
.privacy-body{overflow:auto;border-top:1px solid var(--border);padding-top:14px;
  font-size:13px;line-height:1.75;color:var(--text-muted);margin-bottom:16px}
.privacy-body p{margin:0 0 10px}
.privacy-body b{color:var(--text-secondary)}
@media(max-width:560px){.auth-card{padding:22px 18px 18px}.auth-methods{grid-template-columns:1fr}}
.burger{display:none;margin-left:auto;background:none;border:1px solid var(--border-strong);
  color:var(--text-primary);border-radius:6px;padding:7px 12px;font-family:var(--mono);
  font-size:11.5px;letter-spacing:.1em;cursor:pointer}

/* ==========================================================================
   通用链接与按钮
   ========================================================================== */
.more{display:inline-flex;align-items:center;gap:9px;font-size:15px;color:var(--accent);
  font-weight:500;transition:gap .22s}
.more::after{content:"→";transition:transform .22s}
.more:hover{gap:13px}
.btn{display:inline-flex;align-items:center;gap:9px;padding:14px 26px;border-radius:7px;
  font-size:15px;font-weight:500;border:1px solid transparent;transition:all .22s}
.btn-1{background:var(--accent);color:var(--on-accent)}
.btn-1:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(14,122,90,.28)}
[data-theme="dark"] .btn-1:hover{box-shadow:0 10px 26px rgba(47,217,160,.28)}
.btn-2{border-color:var(--border-strong);color:var(--text-secondary)}
.btn-2:hover{border-color:var(--accent);color:var(--accent)}
.btns{display:flex;gap:12px;flex-wrap:wrap}

/* ==========================================================================
   首屏（hero）
   Hero 图片为 <img> 双图叠加（.art-dark / .art-light，opacity 350ms crossfade）。
   Light/Dark 两套图在桌面采用「各自主体中心 ≈ 页面 67%」的同构图：
   图片以右缘为锚、横向缩放保持 16:9 原比，标题区不动、左侧干净。
   ========================================================================== */
.hero{position:relative;overflow:hidden;min-height:min(82vh,700px);display:flex;
  align-items:center;padding-block:clamp(48px,6vw,92px);background:var(--background)}
.hero-bg{position:absolute;inset:0;z-index:0}
/* 重要：顶部通用 `.hero-bg .art{inset:0;height:100%}` 会推入 left:0/height:100%。
   这里显式重置 left/bottom/height，恢复「右缘锚定 + 保持 16:9 原比」构图；
   否则图会被纵向裁满 Hero 高度并贴在视口左缘（细胞主体压到正文上）。 */
.hero-bg .art{position:absolute;right:-4%;left:auto;top:50%;bottom:auto;
  transform:translateY(-48%);width:min(64vw,1000px);max-width:none;height:auto;
  filter:saturate(1.05);
  -webkit-mask-image:radial-gradient(closest-side,#000 52%,transparent 90%);
  mask-image:radial-gradient(closest-side,#000 52%,transparent 90%)}
/* Dark 深空遮罩（保留原效果）：左边压字区 + 上下融入深空。
   Light 不需要遮罩（浅图 + 深字天然高对比）。 */
.hero-bg::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(90deg,#060A12 6%,rgba(6,10,18,.9) 30%,rgba(6,10,18,.25) 62%,rgba(6,10,18,.55) 100%),
    linear-gradient(180deg,#060A12 0%,transparent 22%,transparent 74%,#060A12 100%)}
[data-theme="light"] .hero-bg::after{display:none}

/* 桌面 Hero 构图（≥1041px；移动端单独处理见响应式区）。
   两张图各自按「图内强内容中心」反推锚点，使主体中心都落在页面 65–70%：
   - Dark（原图_封面细胞，图内主体 ≈0.48）：图宽 72vw、right:-5%（右缘≈105% 出血）
     → 左缘≈33%，主体中心 ≈ 33% + 0.48×72% ≈ 67.6%。
   - Light（light/(3)，图内主体 ≈0.684）：图宽 72vw、right:8%（右缘≈92%）
     → 左缘≈20%，主体中心 ≈ 20% + 0.684×72% ≈ 69.2%；其图内主体只占右半
     （51%–93% → 页面 57%–87%），图左段近白，标题天然干净。
   遮罩：Dark 用原有深空遮罩；Light 关闭遮罩。 */
@media(min-width:1041px){
  [data-theme="dark"] .hero-bg .art-light{opacity:0}
  [data-theme="dark"] .hero-bg .art-dark{opacity:1;
    width:min(72vw,1200px);right:4%;left:auto;top:46%;transform:translateY(-50%)}
  [data-theme="light"] .hero-bg .art-dark{display:none}
  [data-theme="light"] .hero-bg .art-light{display:block;opacity:1;
    width:min(72vw,1200px);right:8%;left:auto;top:46%;transform:translateY(-50%)}
}
.hero .wrap{position:relative;z-index:1;width:100%}
.hero-copy{max-width:min(640px,60%)}
.hero h1{margin:20px 0 0}
.hero .body-lg{margin-top:22px;max-width:34em;color:var(--text-secondary)}
.hero .btns{margin-top:38px}

/* ==========================================================================
   动态条
   ========================================================================== */
.feed{display:grid;grid-template-columns:repeat(3,1fr);gap:0;
  border-top:1px solid var(--border)}
.feed-item{padding:26px 30px 30px 0;border-right:1px solid var(--border);
  display:flex;flex-direction:column;gap:9px;transition:opacity .2s}
.feed-item:last-child{border-right:0}
.feed-item:hover{opacity:.72}
.feed-item:hover h3{color:var(--accent)}
.feed-meta{display:flex;gap:12px;align-items:center;font-family:var(--mono);
  font-size:11px;letter-spacing:.12em;color:var(--text-faint)}
.feed-meta em{font-style:normal;color:var(--accent)}
.feed-item h3{font-size:16.5px;font-weight:700;line-height:1.55;letter-spacing:0}
.feed-head{display:flex;justify-content:space-between;align-items:baseline;
  gap:20px;margin-bottom:22px;flex-wrap:wrap}

/* ==========================================================================
   图文交替块（duo）
   ========================================================================== */
.duo{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,6vw,88px);align-items:center}
.duo.flip .duo-art{order:-1}
.duo-copy > * + *{margin-top:20px}
.duo-art img{border-radius:14px}
.duo-art .art-stack{border-radius:14px}

/* ==========================================================================
   简明列表（rows）
   ========================================================================== */
.rows{border-top:1px solid var(--border)}
.row{display:grid;grid-template-columns:auto 1fr auto;gap:clamp(20px,4vw,56px);
  align-items:baseline;padding:clamp(24px,3vw,34px) 0;border-bottom:1px solid var(--border);
  transition:background .25s;position:relative}
.row::before{content:"";position:absolute;left:calc(var(--gutter)*-1);right:calc(var(--gutter)*-1);
  top:0;bottom:0;background:var(--surface-2);opacity:0;transition:opacity .25s;z-index:-1}
.row:hover::before{opacity:1}
.row::after{content:"";position:absolute;left:calc(var(--gutter)*-1);top:20%;bottom:20%;
  width:2px;background:var(--accent);opacity:0;transition:opacity .25s}
.row:hover::after{opacity:1}

.row-n{font-family:var(--mono);font-size:12px;color:var(--text-faint);letter-spacing:.1em;
  padding-top:6px;min-width:2.4em}
.row-main h3{font-size:clamp(19px,2.1vw,25px)}
.row-main p{margin-top:9px;font-size:14.5px;color:var(--text-muted);max-width:52ch}
.row-side{font-size:13px;color:var(--text-muted);text-align:right;min-width:120px;
  font-family:var(--mono);letter-spacing:.06em;padding-top:6px}
.row-side.on{color:var(--accent)}
.row-side.data{color:var(--data)}

/* ==========================================================================
   数字（figs）
   ========================================================================== */
.figs{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,3vw,44px)}
.fig .n{font-family:var(--display);font-weight:800;font-size:clamp(28px,3.6vw,48px);
  color:var(--text-primary);line-height:1.08;letter-spacing:-.03em;white-space:nowrap;
  min-height:calc(clamp(28px,3.6vw,48px)*1.1);display:flex;align-items:flex-end}
.fig .n.cjk{font-family:var(--body);font-weight:900;font-size:clamp(19px,2.1vw,28px);
  letter-spacing:-.01em;white-space:nowrap}
.fig .n.accent{color:var(--accent)}
.fig .l{font-size:13.5px;color:var(--text-muted);margin-top:12px;line-height:1.65;
  padding-top:12px;border-top:1px solid var(--border)}

.cols2{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,4vw,60px);margin-top:26px}
.cols2 > div > * + *{margin-top:16px}
.figure{margin:0}
.figure img{border-radius:14px;width:100%}
.figure figcaption{margin-top:16px;font-size:13.5px;color:var(--text-muted);line-height:1.75}
.figure .art-stack{border-radius:14px}

/* ==========================================================================
   全幅图文（feature）—— 暗岛策略
   暗岛：原 Dark 模式下保留「深色遮罩 + 暗色文字」效果；Light 模式改为
   「白底 + 深藏青文字」与图保持一致氛围。
   ========================================================================== */
.feature{position:relative;overflow:hidden;display:flex;align-items:center;
  min-height:clamp(400px,48vw,600px);padding-block:clamp(64px,8vw,112px);
  background:var(--background)}
/* Dark 下的暗岛：深遮罩 */
.feature::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:0;
  background:
    linear-gradient(90deg,#060A12 2%,rgba(6,10,18,.9) 32%,rgba(6,10,18,.2) 76%,rgba(6,10,18,.5) 100%),
    linear-gradient(180deg,#060A12,transparent 16%,transparent 84%,#060A12)}
[data-theme="dark"] .feature::after{opacity:1}
.feature .kicker{color:var(--accent)}
.feature .h-lg,.feature .h-md{color:var(--text-primary)}
.feature .body-lg,.feature .body{color:var(--text-secondary)}
.feature .more{color:var(--accent)}
[data-theme="dark"] .feature .kicker{color:#2FD9A0}
[data-theme="dark"] .feature .h-lg,[data-theme="dark"] .feature .h-md{color:#fff}
[data-theme="dark"] .feature .body-lg,[data-theme="dark"] .feature .body{color:#C3D0DE}
[data-theme="dark"] .feature .more{color:#2FD9A0}

.feature-bg{position:absolute;inset:0;z-index:0}
.feature-bg .art{width:100%;height:100%;object-fit:cover;opacity:.5}
[data-theme="light"] .feature-bg .art-dark{display:none}
[data-theme="light"] .feature-bg .art-light{display:block;opacity:.55}
[data-theme="dark"]  .feature-bg .art-light{display:none}
[data-theme="dark"]  .feature-bg .art-dark{opacity:.5}
.feature > .wrap,.feature > .wrap-wide{position:relative;z-index:1;width:100%}
.feature-copy > * + *{margin-top:20px}
[data-theme="dark"] .feature .h-lg,[data-theme="dark"] .feature .h-md{text-shadow:0 2px 24px rgba(6,10,18,.75)}

.feature--left .feature-copy{max-width:min(580px,56%)}
.feature--right .feature-copy{max-width:min(580px,56%);margin-left:auto}

.feature--center{text-align:center;min-height:clamp(520px,58vw,760px)}
[data-theme="light"] .feature--center .feature-bg .art-light{opacity:.7}
[data-theme="dark"]  .feature--center .feature-bg .art-dark{opacity:.72}
.feature--center .feature-copy{max-width:min(780px,100%);margin-inline:auto}
.feature--center .kicker{justify-content:center}
.feature--center .more{margin-inline:auto}

/* species-row：在生命之树上的小标签条（feature--center 内） */
.species-row{display:flex;justify-content:center;flex-wrap:wrap;
  margin-top:clamp(34px,4.5vw,58px);border-top:1px solid var(--border-strong)}
.species-row div{padding:20px clamp(14px,2.6vw,36px);
  border-right:1px solid var(--border);text-align:center}
.species-row div:last-child{border-right:0}
.species-row b{display:block;font-size:15px;color:var(--text-primary);font-weight:700;letter-spacing:.01em}
.species-row span{font-family:var(--display);font-size:12px;color:var(--text-muted);font-style:italic}
[data-theme="dark"] .species-row b{color:#EDF2F8;text-shadow:0 1px 12px rgba(6,10,18,.9)}
[data-theme="dark"] .species-row span{color:#C3D0DE;text-shadow:0 1px 12px rgba(6,10,18,.9)}

.sp-cell{display:inline-flex;align-items:center;gap:12px}
.sp-cell img{width:32px;height:32px;flex:none;opacity:.9;background:var(--sp-bg);
  border-radius:6px}
/* Light 主题下，sp-* 物种原图是深色绘景：与表格浅底用 mix-blend-mode 融合，
   不增加额外 light 资源（light/ 无物种插画） */
[data-theme="light"] .sp-cell img{mix-blend-mode:multiply;background:transparent}
[data-theme="light"] .sp-cell{--sp-bg:transparent}

/* ==========================================================================
   引言
   ========================================================================== */
.quote{max-width:24ch;font-size:clamp(24px,3.4vw,40px);line-height:1.34;
  color:var(--text-primary);font-weight:700;letter-spacing:-.02em}
.quote-by{margin-top:26px;font-size:14px;color:var(--text-muted);line-height:1.7}
.quote-by b{display:block;color:var(--text-primary);font-weight:700;font-family:var(--display);
  font-size:17px;letter-spacing:0}

/* ==========================================================================
   表格
   ========================================================================== */
.tbl{width:100%;border-collapse:collapse;font-size:14.5px}
.tbl th{text-align:left;font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--text-faint);font-weight:500;padding:0 18px 14px 0;
  border-bottom:1px solid var(--border-strong)}
.tbl td{padding:18px 18px 18px 0;border-bottom:1px solid var(--border);vertical-align:top;
  color:var(--text-muted)}
.tbl tr:hover td{color:var(--text-secondary)}
.tbl td:first-child{color:var(--text-primary);font-weight:500}
.tbl td.num{font-family:var(--mono);color:var(--text-secondary);white-space:nowrap}
.tbl-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}

/* ==========================================================================
   论文列表
   ========================================================================== */
.papers{border-top:1px solid var(--border)}
.paper{display:grid;grid-template-columns:88px 1fr auto;gap:clamp(16px,3vw,40px);
  padding:24px 0;border-bottom:1px solid var(--border);align-items:baseline}
.paper .yr{font-family:var(--mono);font-size:13px;color:var(--accent);letter-spacing:.06em}
.paper .ti{color:var(--text-primary);font-size:15.5px;line-height:1.6;font-weight:500}
.paper .jn{font-size:13px;color:var(--text-muted);margin-top:6px;font-style:italic}
.paper .tag{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;color:var(--text-faint);
  white-space:nowrap;padding-top:4px}

/* ==========================================================================
   团队（Team）—— editorial 排版
   ========================================================================== */
.people{display:grid;gap:1px;background:var(--border);border-block:1px solid var(--border)}
.pp{background:var(--background);padding:clamp(30px,4vw,52px) 0;display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);gap:clamp(24px,5vw,72px)}
.pp .l-col .role{font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  color:var(--accent);text-transform:uppercase}
.pp .l-col .nm{font-family:var(--display);font-size:clamp(24px,3vw,36px);font-weight:700;
  color:var(--text-primary);margin-top:12px;letter-spacing:-.01em;line-height:1.2}
.pp .l-col .nm.cjk{font-family:var(--body);font-weight:900}
.pp .l-col .ttl{font-size:15px;color:var(--text-secondary);margin-top:8px}
.pp .r-col p{font-size:15px;color:var(--text-muted);line-height:1.85}
.pp .r-col p + p{margin-top:14px}
.pp-figs{display:flex;gap:clamp(20px,4vw,44px);margin-top:22px;flex-wrap:wrap}
.pp-figs div{font-family:var(--mono);font-size:12px;color:var(--text-muted)}
.pp-figs b{display:block;font-family:var(--display);font-size:22px;color:var(--accent);
  font-weight:800;letter-spacing:-.01em;margin-bottom:2px}
.acads{margin-top:20px;columns:2;column-gap:34px;font-size:13px;color:var(--text-faint);
  list-style:none;padding:0}
.acads li{padding:3px 0;break-inside:avoid;line-height:1.6}
.acads span{font-family:var(--mono);color:var(--accent-dim);margin-right:8px;font-size:11px}

/* ==========================================================================
   时间线
   ========================================================================== */
.tl{border-top:1px solid var(--border)}
.tl-item{display:grid;grid-template-columns:110px 1fr;gap:clamp(20px,4vw,48px);
  padding:22px 0;border-bottom:1px solid var(--border)}
.tl-item .y{font-family:var(--mono);font-size:14px;color:var(--accent);letter-spacing:.06em}
.tl-item .w{color:var(--text-secondary);font-size:15px}
.tl-item .w em{font-style:normal;display:block;color:var(--text-muted);font-size:13.5px;margin-top:4px}

/* ==========================================================================
   蛋白汇合图（merge）—— SVG 颜色 token 化
   ========================================================================== */
.merge{display:grid;grid-template-columns:1fr auto 1fr;gap:clamp(20px,4vw,56px);
  align-items:center;margin-top:clamp(36px,5vw,64px)}
.mside .tt{font-family:var(--mono);font-size:11px;letter-spacing:.18em;margin-bottom:12px}
.mside.a .tt{color:var(--text-muted)}
.mside.b .tt{color:var(--accent)}
.mside h3{font-size:clamp(18px,2vw,23px)}
.mside .sub{font-family:var(--display);font-size:13.5px;color:var(--text-muted);margin-top:5px;font-weight:600}
.mside dl{margin:20px 0 0;display:grid;grid-template-columns:auto 1fr;gap:12px 18px;font-size:14.5px}
.mside dt{font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;color:var(--text-faint);
  padding-top:5px}
.mside dd{margin:0;color:var(--text-secondary);line-height:1.6}
.mside.b{text-align:right}
.mside.b dl{grid-template-columns:1fr auto}
.mside.b dt{order:2}
.mside.b dd{order:1}
.mnode{width:clamp(168px,17vw,208px);aspect-ratio:1;position:relative;display:grid;
  place-items:center;text-align:center;flex:none}
.mnode svg{position:absolute;inset:0;width:100%;height:100%}

.mnode .in{position:relative;z-index:2}
.mnode .in .lb{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;color:var(--data)}
.mnode .in .big{font-size:clamp(26px,3vw,34px);font-weight:900;color:var(--text-primary);margin:5px 0 1px}
.mnode .in .e{font-family:var(--display);font-size:11px;letter-spacing:.24em;color:var(--text-muted);font-weight:600}
.spin-a{animation:spin 30s linear infinite;transform-origin:50% 50%}
.spin-b{animation:spin 40s linear infinite reverse;transform-origin:50% 50%}
@keyframes spin{to{transform:rotate(360deg)}}
.merge-note{margin-top:clamp(28px,4vw,44px);text-align:center;font-size:clamp(14px,1.5vw,17px);
  color:var(--text-muted);line-height:2}
.merge-note b{color:var(--text-primary);font-weight:700}
.merge-note i{font-style:normal;color:var(--data)}

/* SVG 圆环：mnode SVG 用 stroke 属性直接写值；用 CSS 属性选择器覆盖
   （presentation attribute 优先级低于 CSS）。
   内圆盘（mnode-disk）：Light 白底/浅描边，Dark 深底/深描边——保证"共同语言/
   蛋白/PROTEIN"文字在两主题下都有足够对比度。 */
[data-theme="dark"] .mnode circle[stroke="#CBD5E1"]{stroke:#1A2536}
[data-theme="dark"] .mnode circle[stroke="#0E7A5A"]{stroke:#2FD9A0}
[data-theme="dark"] .mnode circle[stroke="#EA580C"]{stroke:#F2A93B}
[data-theme="dark"] .mnode .mnode-disk{fill:#0B121D;stroke:#243349}
[data-theme="dark"] .mnode circle[stroke="#CBD5E1"][stroke-width="1.4"]{stroke:#1A2536}

/* ==========================================================================
   CTA 区
   ========================================================================== */
.cta{border-top:1px solid var(--border)}
.cta-in{display:grid;grid-template-columns:1fr auto;gap:clamp(28px,5vw,64px);align-items:center}

/* ==========================================================================
   页脚
   ========================================================================== */
.foot{background:var(--surface-2);border-top:1px solid var(--border);
  padding-block:clamp(48px,6vw,72px) 30px;transition:background-color .35s}
.foot-top{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:clamp(26px,4vw,56px)}
.foot-col h4{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;color:var(--text-faint);
  text-transform:uppercase;font-weight:500;margin-bottom:16px}
.foot-col a,.foot-col p{display:block;font-size:14px;color:var(--text-muted);padding:5px 0;
  transition:color .2s}
.foot-col a:hover{color:var(--accent)}
.foot-brand img{height:22px;margin-bottom:16px}
.foot-brand p{font-size:13.5px;color:var(--text-muted);max-width:30ch;line-height:1.8}
.foot-btm{margin-top:clamp(36px,5vw,56px);padding-top:24px;border-top:1px solid var(--border);
  display:flex;gap:10px 24px;flex-wrap:wrap;align-items:center;justify-content:space-between}
/* .beian 占位区已删除——保留 .foot-btm/.copy 即可 */
.copy{font-family:var(--mono);font-size:11.5px;color:var(--text-faint);letter-spacing:.06em}

/* ==========================================================================
   页头（phead）—— phead--art 为暗岛
   ========================================================================== */
.phead{padding-block:clamp(56px,7vw,104px) clamp(36px,5vw,64px);border-bottom:1px solid var(--border)}
.phead--art{position:relative;overflow:hidden;
  padding-block:clamp(72px,9vw,132px) clamp(48px,6vw,84px)}
[data-theme="light"] .phead--art{background:var(--background)}
.phead .kicker{color:var(--accent)}
.phead .h-lg{color:var(--text-primary)}
.phead .body-lg{color:var(--text-secondary)}
[data-theme="dark"] .phead--art .kicker{color:#2FD9A0}
[data-theme="dark"] .phead--art .h-lg{color:#fff}
[data-theme="dark"] .phead--art .body-lg{color:#C3D0DE}

.phead-bg{position:absolute;inset:0;z-index:0}
.phead-bg .art{width:100%;height:100%;object-fit:cover;object-position:72% 50%;opacity:.6}
[data-theme="light"] .phead-bg .art-dark{display:none}
[data-theme="light"] .phead-bg .art-light{display:block;opacity:.65}
[data-theme="dark"]  .phead-bg .art-light{display:none}
[data-theme="dark"]  .phead-bg .art-dark{opacity:.6}
/* Dark 遮罩：仅 Dark 模式生效 */
.phead-bg::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(90deg,#060A12 4%,rgba(6,10,18,.86) 34%,rgba(6,10,18,.3) 78%,rgba(6,10,18,.6) 100%),
    linear-gradient(180deg,#060A12 1%,transparent 30%,rgba(6,10,18,.55) 82%,#060A12 100%)}
[data-theme="light"] .phead-bg::after{display:none}
.phead--art > .wrap{position:relative;z-index:1}
[data-theme="dark"] .phead--art h1{text-shadow:0 2px 24px rgba(6,10,18,.8)}
.phead h1{margin-top:18px}
.phead .body-lg{margin-top:22px}

/* ==========================================================================
   Team 前台（Public Frontend Phase 4）
   ========================================================================== */
.team-group{margin-bottom:clamp(24px,3vw,40px)}
.team-cat{margin-bottom:18px;letter-spacing:.02em}
.team-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:clamp(24px,3vw,40px)}
.team-grid--compact{gap:clamp(20px,2.5vw,32px)}
.team-card{display:grid;grid-template-columns:96px 1fr;gap:18px;align-items:start}
/* 无 photo 时：photo 容器不渲染，整张卡塌成单列 */
.team-card--no-photo{grid-template-columns:1fr;gap:0}
.team-photo{width:96px;height:120px;flex:none;border-radius:6px;background:var(--surface-2);
  display:grid;place-items:center;overflow:hidden}
.team-photo img{width:100%;height:100%;object-fit:cover}
.team-photo--empty{font-family:var(--mono);color:var(--text-muted);font-size:18px}
.team-photo--empty span{opacity:.6}
.team-body{min-width:0}
.team-role{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;color:var(--accent);
  text-transform:uppercase;margin-bottom:6px}
.team-name{font-size:clamp(18px,1.9vw,22px);font-weight:700;color:var(--text-primary);
  line-height:1.3;letter-spacing:0;margin-bottom:2px}
.team-title{font-size:14px;color:var(--text-secondary);margin-bottom:10px}
.team-bio{font-size:14.5px;line-height:1.8;color:var(--text-muted)}
.team-bio p{margin:.4em 0}
.team-links{display:flex;gap:14px;margin-top:12px}
.team-link{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--accent)}
.team-link:hover{color:var(--text-primary)}
@media(max-width:820px){
  .team-card{grid-template-columns:72px 1fr;gap:14px}
  .team-photo{width:72px;height:90px}
}

/* ==========================================================================
   Careers 前台（Public Frontend Phase 3）
   ========================================================================== */
.cr-row .row-n{font-family:var(--mono);font-size:12px;color:var(--text-faint);
  letter-spacing:.04em;min-width:6em;text-transform:uppercase}
.cr-row .row-side{display:flex;flex-direction:column;align-items:flex-end;gap:8px;
  min-width:140px}
.cr-emp{font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;color:var(--text-muted);
  padding:3px 9px;border:1px solid var(--border-strong);border-radius:99px}
.cr-more{color:var(--accent);font-size:13px;white-space:nowrap}
@media(max-width:820px){
  .cr-row .row-side{flex-direction:row;align-items:baseline;justify-content:space-between;
    width:100%;padding-top:2px}
}

/* ==========================================================================
   Publications 前台（Public Frontend Phase 2）
   ========================================================================== */
.paper .ti a{color:inherit}
.paper .ti a:hover{color:var(--accent)}
.paper.featured .yr{color:var(--data-bright)}
.pub-links{margin-top:8px;display:flex;gap:14px}
.pub-links a{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:var(--accent)}
.pub-links a:hover{color:var(--text-primary)}
.pub-chip{display:inline-block;font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;
  color:var(--text-muted);border:1px solid var(--border-strong);border-radius:99px;
  padding:3px 11px;margin:10px 8px 0 0}
.pub-tags{margin-top:6px}
.pub-abs{margin-top:clamp(28px,4vw,44px);padding-top:22px;border-top:1px solid var(--border)}
.pub-abs .kicker{display:block;margin-bottom:12px}
.pub-more .ti a{color:var(--accent);font-size:15px}

/* ==========================================================================
   News 前台（Public Frontend Phase 1）
   ========================================================================== */
.nws-row .row-n{font-family:var(--mono);font-size:12px;color:var(--text-faint);
  letter-spacing:.04em;min-width:6.5em}
.nws-row .row-side{display:flex;flex-direction:column;align-items:flex-end;gap:8px}
.nws-more{color:var(--accent);font-size:13px;white-space:nowrap}
.phead--flat{padding-block:clamp(48px,6vw,88px) 0;border-bottom:0}
.nws-meta{display:flex;gap:14px;align-items:center;margin-top:16px;
  font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;color:var(--text-faint)}
.nws-meta em{font-style:normal;color:var(--accent)}
.phead--flat h1{margin-top:10px}
.phead--flat .body-lg{margin-top:16px}
.nws-cover{margin:clamp(28px,4vw,48px) 0 0}
.nws-body{max-width:72ch}
.nws-body h2,.nws-body h3,.nws-body h4{margin:1.6em 0 .5em}
.nws-body h2{font-size:clamp(20px,2.4vw,26px)}
.nws-body h3{font-size:clamp(18px,2vw,21px)}
.nws-body h4{font-size:16.5px}
.nws-body p{color:var(--text-secondary);font-size:15.5px;line-height:1.9}
.nws-body ul,.nws-body ol{margin:.8em 0;padding-left:1.5em;color:var(--text-secondary);
  font-size:15.5px;line-height:1.9}
.nws-body li{margin:.35em 0}
.nws-body blockquote{margin:1.2em 0;padding:10px 0 10px 22px;
  border-left:2px solid var(--accent);color:var(--text-muted)}
.nws-body code{font-family:var(--mono);font-size:.9em;background:var(--surface-2);
  padding:2px 7px;border-radius:5px;color:var(--text-primary)}
.nws-body hr{height:1px;background:var(--border);border:0;margin:2em 0}
.nws-body a{color:var(--accent);border-bottom:1px solid rgba(14,122,90,.35)}
[data-theme="dark"] .nws-body a{border-bottom-color:rgba(47,217,160,.35)}
.nws-body a:hover{border-bottom-color:var(--accent)}
/* Markdown 表格 + 图片（News/Publications 正文） */
.nws-body figure{margin:1.6em 0}
.nws-body figure .nws-table{width:100%;border-collapse:collapse;
  font-size:14.5px;line-height:1.6;background:var(--surface);
  border:1px solid var(--border);border-radius:8px;overflow:hidden}
.nws-body .nws-table th,.nws-body .nws-table td{padding:10px 14px;border-bottom:1px solid var(--border);
  vertical-align:top;color:var(--text-secondary)}
.nws-body .nws-table th{background:var(--surface-2);color:var(--text-primary);
  font-weight:700;border-bottom:1px solid var(--border-strong);
  font-family:var(--mono);font-size:12px;letter-spacing:.04em}
.nws-body .nws-table tr:last-child td{border-bottom:none}
.nws-body .nws-table tr:hover td{background:var(--surface-2)}
.nws-body .nws-table code{font-size:.85em;padding:1px 5px}
.nws-body img{max-width:100%;height:auto;display:block;margin:1.4em auto;
  border-radius:8px;border:1px solid var(--border)}
[data-theme="dark"] .nws-body img{border-color:rgba(255,255,255,.10)}
/* 移动端表格：横向滚动避免溢出 */
@media(max-width:820px){
  .nws-body .nws-table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
}
@media(max-width:820px){
  .nws-row .row-n{min-width:5em}
  .nws-row .row-side{flex-direction:row;align-items:baseline;justify-content:space-between;
    width:100%;padding-top:2px}
}

/* ==========================================================================
   入场动画
   ========================================================================== */
.rv{opacity:0;transform:translateY(16px);
  transition:opacity .8s cubic-bezier(.16,.7,.3,1),transform .8s cubic-bezier(.16,.7,.3,1)}
.rv.in{opacity:1;transform:none}

/* ==========================================================================
   路由（单文件预览版）
   ========================================================================== */
.page{display:none}
.page.active{display:block}

/* ==========================================================================
   响应式
   ========================================================================== */
@media(max-width:1040px){
  .hero{min-height:0;display:flex;flex-direction:column;
    padding-block:clamp(38px,8vw,64px) 0}
  .hero .wrap{order:1}
  .hero-copy{max-width:none}
  .hero-bg{order:2;position:relative;inset:auto;width:100%;
    margin-top:clamp(26px,6vw,44px)}
  .hero-bg .art{position:relative;right:auto;top:auto;bottom:auto;left:auto;transform:none;
    animation:none;height:auto;width:116%;max-width:116%;margin-left:-8%;
    -webkit-mask-image:radial-gradient(closest-side,#000 56%,transparent 94%);
    mask-image:radial-gradient(closest-side,#000 56%,transparent 94%);opacity:1}
  /* 移动端：Hero 图上下排布（文字在图片上方）。只让当前主题的那张参与文档流，
     隐藏另一张避免双图叠出双倍高度；light 的白色 wash 关闭（图独立成块无需压字）。 */
  [data-theme="dark"] .hero-bg .art-dark{display:block;opacity:1}
  [data-theme="dark"] .hero-bg .art-light{display:none}
  [data-theme="light"] .hero-bg .art-dark{display:none}
  [data-theme="light"] .hero-bg .art-light{display:block;opacity:1}
  .hero-bg::after{display:none}
  .duo,.cta-in,.cols2{grid-template-columns:1fr;gap:32px}
  .feature{min-height:0;padding-block:clamp(56px,10vw,88px)}
  .feature--left .feature-copy,.feature--right .feature-copy{max-width:none;margin-left:0}
  [data-theme="light"] .feature-bg .art-dark,[data-theme="light"] .feature-bg .art-light,
  [data-theme="dark"]  .feature-bg .art-dark,[data-theme="dark"]  .feature-bg .art-light{opacity:.5}
  [data-theme="light"] .feature--center .feature-bg .art-dark,
  [data-theme="light"] .feature--center .feature-bg .art-light,
  [data-theme="dark"]  .feature--center .feature-bg .art-dark,
  [data-theme="dark"]  .feature--center .feature-bg .art-light{opacity:.55}
  .feature::after{opacity:0!important}
  [data-theme="dark"] .feature::after{opacity:1}
  .feature--left .feature-copy,.feature--right .feature-copy{max-width:none;margin-left:0}
  .phead--art{padding-block:clamp(54px,11vw,88px) clamp(36px,6vw,60px)}
  [data-theme="light"] .phead-bg .art{opacity:.55}
  [data-theme="dark"]  .phead-bg .art{opacity:.4}
  [data-theme="light"] .phead-bg::after,[data-theme="dark"] .phead-bg::after{
    background:linear-gradient(180deg,#060A12 1%,rgba(6,10,18,.5) 34%,rgba(6,10,18,.55) 76%,#060A12);
    display:block}
  [data-theme="light"] .phead-bg::after{opacity:0}
  .duo.flip .duo-art{order:0}
  .figs{grid-template-columns:repeat(2,1fr);gap:28px}
  .pp{grid-template-columns:1fr;gap:22px}
  .foot-top{grid-template-columns:1fr 1fr}
  .merge{grid-template-columns:1fr;gap:28px;justify-items:center;text-align:center}
  .mside{width:100%;max-width:460px}
  .mside.b{text-align:center}
  .mside dl,.mside.b dl{grid-template-columns:auto 1fr;text-align:left}
  .mside.b dt{order:0}
  .mside.b dd{order:0}
}
@media(max-width:820px){
  .nav-in{position:relative}
  .nav-drawer{display:none;position:absolute;top:var(--nav-h);left:0;right:0;margin:0;
    flex-direction:column;align-items:stretch;background:var(--background);
    border-bottom:1px solid var(--border);padding:8px 8px 14px;
    box-shadow:0 18px 40px rgba(15,30,46,.12)}
  [data-theme="dark"] .nav-drawer{background:var(--surface);
    box-shadow:0 18px 40px rgba(0,0,0,.5)}
  .nav-drawer.open{display:flex}
  .nav-main{flex-direction:column;align-items:stretch;gap:0}
  .nav-main a{padding:14px 16px;font-size:16px;border-radius:0;
    border-bottom:1px solid var(--border)}
  .nav-side{margin:12px 8px 0;padding:0;border-left:0;justify-content:space-between}
  .nav-side .lang{border:1px solid var(--border-strong);border-radius:6px;padding:10px 14px}
  .nav-side .nav-cta{padding:11px 22px}
  .nav-side .theme-toggle{margin:6px 0}
  .burger{display:block}
  .brand b{display:none}
  .feed{grid-template-columns:1fr}
  .feed-item{border-right:0;border-bottom:1px solid var(--border);padding-right:0}
  .feed-item:last-child{border-bottom:0}
  .row{grid-template-columns:auto 1fr;gap:16px}
  .row-side{grid-column:2;text-align:left;padding-top:10px}
  .paper{grid-template-columns:64px 1fr}
  .paper .tag{grid-column:2;padding-top:8px}
  .acads{columns:1}
  .tl-item{grid-template-columns:78px 1fr;gap:16px}
}
@media(max-width:560px){
  .figs,.foot-top{grid-template-columns:1fr}
  .species-row div{padding:14px 16px;border-right:0;border-bottom:1px solid var(--border);
    flex:1 1 42%}
  .sp-cell img{width:26px;height:26px}
  .fig .l{padding-top:10px}
}
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important}
  .rv{opacity:1;transform:none}
  html{scroll-behavior:auto}
  .art-stack .art,.hero-bg .art,.feature-bg .art,.phead-bg .art{transition:none!important}
}

/* === 公众号二维码区域（响应式）：img + 文字 row 排版 + quiet zone + 1:1 === */
/* .qr 位于 .foot-col.foot-brand 内，.foot-brand img{height:22px} 特异性更高，
   必须用 .foot-brand .qr-img 提权，否则二维码高度被压成 22px 扁条。 */
.qr{margin-top:12px;display:flex;align-items:center;gap:32px}
.qr-box{display:none}
.qr-img{width:104px;height:104px;padding:10px;background:#fff;border-radius:6px;
  display:block;object-fit:contain;flex:none}
.foot-brand .qr-img{width:104px;height:104px;padding:10px;margin-bottom:0}
.qr span{font-size:12px;color:var(--text-muted);line-height:1.7;max-width:14ch}
@media(max-width:560px){
  .qr{gap:24px;margin-top:8px}
  .qr-img,.foot-brand .qr-img{width:88px;height:88px;padding:8px;margin-bottom:0}
  .qr span{font-size:11.5px}
}

/* === 品牌 logo 双主题：Dark 白 / Light 蓝 === */
.logo-light{display:none}
.logo-dark{display:block}
[data-theme="light"] .logo-dark{display:none}
[data-theme="light"] .logo-light{display:block}
.brand .brand-logo,.foot-brand .foot-logo{height:22px;width:auto;flex:none}