/* ============================================================
   SGEOO 官网 · 设计系统
   语言：东方哲学 × AI未来主义（「审慎的未来主义」）
   墨色为底 · 青玉/靛蓝为光 · 审慎金为饰 · 太极两仪为骨
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root{
  --ink-900:#070A12;
  --ink-850:#090D1A;
  --ink-800:#0C1122;
  --ink-700:#10182E;
  --ink-600:#16203A;
  --line:rgba(255,255,255,.07);
  --line-2:rgba(255,255,255,.12);
  --text:#E9EDF7;
  --text-dim:#9DA8C4;
  --text-faint:#69748F;

  --cyan:#34E0C8;
  --cyan-2:#27B7E6;
  --indigo:#5B7CFF;
  --violet:#8C6CF0;
  --gold:#D8B66B;
  --good:#41D68C;
  --warn:#F0B45A;
  --danger:#F0727E;

  --grad-tech:linear-gradient(120deg,#34E0C8 0%,#5B7CFF 58%,#8C6CF0 100%);
  --grad-gold:linear-gradient(120deg,#E7CE94,#C99F4E);

  --r-sm:10px; --r:16px; --r-lg:22px; --r-xl:30px;
  --container:1180px; --narrow:840px;
  --sp-section:clamp(72px,9vw,128px);

  --shadow-sm:0 4px 18px rgba(0,0,0,.28);
  --shadow:0 18px 50px rgba(0,0,0,.45);
  --shadow-glow:0 0 0 1px var(--line-2),0 24px 70px rgba(20,40,90,.45);

  --ease:cubic-bezier(.22,.61,.36,1);
  --font-display:'Space Grotesk','Inter',-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-body:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
}

/* ---------- 基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{
  margin:0;font-family:var(--font-body);color:var(--text);
  background:var(--ink-900);line-height:1.65;
  font-size:clamp(15px,1.05vw,16.5px);letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .25s var(--ease)}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:600;line-height:1.18;letter-spacing:-.01em;margin:0}
h2{font-size:clamp(26px,3.6vw,42px)}
h3{font-size:clamp(18px,1.6vw,21px)}
p{margin:0}
mark{background:transparent;color:var(--cyan);font-weight:600}
strong{color:#fff;font-weight:600}
::selection{background:rgba(52,224,200,.28);color:#fff}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 clamp(20px,4vw,40px)}
.container--narrow{max-width:var(--narrow)}
.skip-link{position:absolute;left:-999px;top:0;background:var(--cyan);color:#03110d;padding:10px 16px;border-radius:0 0 8px 0;z-index:200}
.skip-link:focus{left:0}

/* ---------- 按钮 ---------- */
.btn{
  --bg:transparent;display:inline-flex;align-items:center;justify-content:center;gap:.5em;
  font-family:var(--font-display);font-weight:600;font-size:14.5px;
  padding:12px 22px;border-radius:999px;border:1px solid transparent;cursor:pointer;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),background .25s,border-color .25s,color .25s;
  white-space:nowrap;
}
.btn--lg{padding:15px 30px;font-size:15.5px}
.btn--block{display:flex;width:100%}
.btn--primary{color:#04130f;background:var(--grad-tech);box-shadow:0 10px 28px rgba(52,120,220,.4)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(52,140,230,.55)}
.btn--ghost{color:var(--text);border-color:var(--line-2);background:rgba(255,255,255,.02)}
.btn--ghost:hover{border-color:var(--cyan);color:#fff;background:rgba(52,224,200,.08)}

/* ---------- 生态丝带 ---------- */
.eco-ribbon{background:linear-gradient(90deg,rgba(140,108,240,.10),rgba(52,224,200,.08));border-bottom:1px solid var(--line);font-size:12.5px}
.eco-ribbon__inner{display:flex;align-items:center;gap:18px;height:38px;overflow:hidden}
.eco-ribbon__brand{color:var(--gold);font-family:var(--font-display);letter-spacing:.04em;white-space:nowrap}
.eco-ribbon__list{display:flex;gap:16px;list-style:none;margin:0;padding:0;flex:1;min-width:0;overflow:hidden}
.eco-ribbon__list a,.eco-ribbon__list .is-here{display:flex;gap:6px;align-items:baseline;color:var(--text-dim);font-family:var(--font-display);transition:color .25s}
.eco-ribbon__list a:hover{color:var(--text)}
.eco-ribbon__list span{font-size:11px;color:var(--text-faint)}
.eco-ribbon__list .is-here{color:var(--cyan)}
.eco-ribbon__list .is-here span{color:rgba(52,224,200,.7)}
.eco-ribbon__home{color:var(--text-dim);white-space:nowrap}
.eco-ribbon__home:hover{color:var(--cyan)}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:100;background:rgba(7,10,18,.55);backdrop-filter:blur(16px) saturate(140%);border-bottom:1px solid transparent;transition:background .3s,border-color .3s}
.nav.is-stuck{background:rgba(7,10,18,.88);border-bottom-color:var(--line)}
.nav__inner{display:flex;align-items:center;gap:24px;height:66px}
.brand{display:flex;align-items:center;gap:10px}
.brand__mark{display:grid;place-items:center;filter:drop-shadow(0 4px 12px rgba(52,224,200,.4))}
.brand__text{font-family:var(--font-display);font-weight:700;font-size:20px;letter-spacing:.02em;line-height:1;display:flex;flex-direction:column}
.brand__text small{font-size:10px;font-weight:500;color:var(--text-faint);letter-spacing:.06em;margin-top:3px}
.nav__drawer{display:contents}
.nav__links{display:flex;gap:2px;margin-left:18px;align-items:center}
.nav__item{position:relative}
.nav__item.has-menu::after{content:"";position:absolute;top:100%;left:0;right:0;height:12px}
.nav__top{display:flex;align-items:center;gap:5px;color:var(--text-dim);font-size:14.5px;padding:9px 13px;border-radius:10px;transition:color .25s,background .25s;white-space:nowrap}
.nav__top:hover,.nav__item:hover>.nav__top{color:#fff;background:rgba(255,255,255,.04)}
.nav__top.is-current{color:var(--cyan)}
.nav__caret{width:10px;height:10px;flex-shrink:0;opacity:.55;transition:transform .25s var(--ease)}
.nav__item:hover .nav__caret{transform:rotate(180deg)}
.nav__menu{position:absolute;top:calc(100% + 12px);left:0;min-width:222px;background:rgba(11,16,32,.97);backdrop-filter:blur(18px) saturate(140%);border:1px solid var(--line-2);border-radius:14px;padding:8px;display:grid;gap:2px;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;box-shadow:var(--shadow);z-index:60}
.nav__item.has-menu:hover>.nav__menu{opacity:1;visibility:visible;transform:none}
.nav__menu a{display:block;padding:9px 12px;border-radius:9px;color:var(--text-dim);font-size:13.5px;transition:background .2s,color .2s}
.nav__menu a:hover{background:rgba(52,224,200,.09);color:#fff}
.nav__cta{display:flex;gap:10px;margin-left:auto}
.nav__cta .btn{padding:9px 16px;font-size:13.5px}
.nav__toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:8px;cursor:pointer;margin-left:auto}
.nav__toggle span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.3s var(--ease)}
.nav__toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav__toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav__toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 通用区块 ---------- */
.section{padding:var(--sp-section) 0;position:relative}
.section--alt{background:linear-gradient(180deg,var(--ink-850),var(--ink-800));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section__head{max-width:760px;margin:0 auto clamp(40px,5vw,64px);text-align:center}
.kicker{display:inline-block;font-family:var(--font-display);font-size:12.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--cyan);margin-bottom:16px;padding:5px 14px;border:1px solid rgba(52,224,200,.3);border-radius:999px;background:rgba(52,224,200,.06)}
.section__head h2{margin-bottom:18px}
.lead{color:var(--text-dim);font-size:clamp(15px,1.3vw,18px);line-height:1.7;text-wrap:balance}
/* 统一治理折行：短文本均衡分行、正文消除末行孤字（杜绝 1-2 字折行） */
h1,h2,h3,.lead,.note,.shift__cap,.hero__title{text-wrap:balance}
.hero__sub,.card p,.faq__a p,.compiler__note,.yi p,.loop__step p{text-wrap:pretty}
.note{max-width:880px;margin:36px auto 0;text-align:center;color:var(--text-dim);font-size:14.5px;padding:18px 24px;border:1px dashed var(--line-2);border-radius:var(--r);background:rgba(255,255,255,.015)}
.note b{color:var(--gold)}
.muted{color:var(--text-faint)}

/* 网格 */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* 卡片 */
.card{position:relative;background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.012));border:1px solid var(--line);border-radius:var(--r-lg);padding:30px 26px;transition:transform .35s var(--ease),border-color .35s,box-shadow .35s;overflow:hidden}
.card::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;background:var(--grad-tech);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .35s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.card:hover::before{opacity:.6}
.card h3{margin-bottom:10px}
.card p{color:var(--text-dim);font-size:14.5px}
.card__icon{width:46px;height:46px;display:grid;place-items:center;border-radius:13px;font-size:22px;margin-bottom:18px;background:rgba(255,255,255,.04);border:1px solid var(--line-2)}
.icon-cross{color:var(--indigo)} .icon-warn{color:var(--gold)} .icon-decay{color:var(--danger)}

/* ============================================================
   HERO
   ============================================================ */
.hero{position:relative;padding:clamp(56px,8vw,104px) 0 clamp(48px,6vw,80px);overflow:hidden}
.hero__bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.hero__glow{position:absolute;border-radius:50%;filter:blur(90px);opacity:.5}
.hero__glow--cyan{width:560px;height:560px;background:radial-gradient(circle,rgba(52,224,200,.35),transparent 65%);top:-160px;left:-120px}
.hero__glow--gold{width:480px;height:480px;background:radial-gradient(circle,rgba(140,108,240,.3),transparent 65%);top:40px;right:-140px}
.hero__grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:54px 54px;mask-image:radial-gradient(ellipse 80% 60% at 50% 30%,#000,transparent 75%)}
.hero__inner{position:relative;z-index:1;display:grid;grid-template-columns:1.18fr .82fr;gap:clamp(32px,4vw,56px);align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--font-display);font-size:13px;letter-spacing:.04em;color:var(--text-dim);margin-bottom:22px;padding:6px 14px 6px 12px;border:1px solid var(--line-2);border-radius:999px;background:rgba(255,255,255,.02)}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(52,224,200,.18);animation:pulse 2.4s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 7px rgba(52,224,200,0)}}
.hero__title{font-size:clamp(29px,4.4vw,50px);line-height:1.18;margin-bottom:22px;letter-spacing:-.01em;text-wrap:balance}
.hero__title br{display:none}
@media (min-width:721px){.hero__title br{display:inline}}
.grad{background:var(--grad-tech);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__sub{color:var(--text-dim);font-size:clamp(15.5px,1.4vw,18.5px);max-width:560px;line-height:1.7}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin:30px 0 16px}
.hero__trust{font-size:12.5px;color:var(--text-faint);letter-spacing:.02em}

/* 答案演示卡 */
.hero__demo{position:relative}
.answer-card{position:relative;background:linear-gradient(180deg,rgba(20,28,52,.92),rgba(12,17,34,.92));border:1px solid var(--line-2);border-radius:var(--r-lg);padding:22px;box-shadow:var(--shadow-glow);backdrop-filter:blur(6px)}
.answer-card::after{content:"";position:absolute;inset:-1px;border-radius:inherit;background:var(--grad-tech);opacity:.16;z-index:-1;filter:blur(14px)}
.answer-card__bar{display:flex;justify-content:space-between;align-items:center;font-size:11.5px;color:var(--text-faint);margin-bottom:16px;gap:10px}
.answer-card__live{display:inline-flex;align-items:center;gap:7px;color:var(--good);font-family:var(--font-display);letter-spacing:.03em}
.answer-card__live i{width:8px;height:8px;border-radius:50%;background:var(--good);box-shadow:0 0 0 0 rgba(65,214,140,.6);animation:pulse2 1.8s infinite}
@keyframes pulse2{0%{box-shadow:0 0 0 0 rgba(65,214,140,.5)}100%{box-shadow:0 0 0 8px rgba(65,214,140,0)}}
.answer-card__plat{text-align:right;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.answer-card__q{font-size:14px;color:var(--text);padding:11px 14px;background:rgba(255,255,255,.04);border-radius:12px 12px 12px 4px;margin-bottom:14px;border:1px solid var(--line)}
.answer-card__a{font-size:14px;color:var(--text-dim);background:rgba(52,124,255,.07);border:1px solid rgba(91,124,255,.22);border-radius:12px 12px 4px 12px;padding:14px}
.answer-card__a p{line-height:1.7}
.cite-row{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}
.cite{font-size:11px;font-family:var(--font-display);color:var(--cyan);border:1px solid rgba(52,224,200,.3);border-radius:6px;padding:2px 9px;background:rgba(52,224,200,.06)}
.answer-card__tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{font-size:11.5px;font-family:var(--font-display);padding:4px 11px;border-radius:999px;border:1px solid var(--line-2);color:var(--text-dim)}
.tag--good{color:var(--good);border-color:rgba(65,214,140,.35);background:rgba(65,214,140,.08)}
.tag--pos{color:var(--gold);border-color:rgba(216,182,107,.35);background:rgba(216,182,107,.08)}
.tag--ci{color:var(--text-faint)}

/* hero 统计条 */
.hero__stats{position:relative;z-index:1;display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:clamp(44px,5vw,72px);padding-top:clamp(28px,4vw,40px);border-top:1px solid var(--line)}
.stat{position:relative;overflow:hidden;display:flex;flex-direction:column;align-items:center;text-align:center;gap:8px;padding:26px 16px 22px;border-radius:var(--r-lg);border:1px solid var(--line);background:radial-gradient(115% 78% at 50% 0%,var(--ag,transparent),transparent 58%),linear-gradient(180deg,rgba(255,255,255,.02),transparent);transition:transform .35s var(--ease),border-color .35s}
.stat:hover{transform:translateY(-4px);border-color:var(--a,rgba(52,224,200,.4))}
.stat__bar{width:30px;height:4px;border-radius:999px;background:var(--a,var(--cyan));box-shadow:0 0 14px var(--ag);margin-bottom:4px}
.stat b{display:block;font-family:var(--font-display);font-size:clamp(30px,3.9vw,46px);font-weight:700;line-height:1;background:var(--grad-tech);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{display:block;font-size:13px;color:var(--text-dim)}

/* ============================================================
   范式对比表
   ============================================================ */
.table-wrap{overflow-x:auto;border-radius:var(--r-lg);border:1px solid var(--line);background:rgba(255,255,255,.015)}
.cmp{width:100%;border-collapse:collapse;min-width:680px;font-size:14.5px}
.cmp th,.cmp td{padding:16px 20px;text-align:left;border-bottom:1px solid var(--line)}
.cmp thead th{font-family:var(--font-display);font-weight:600;color:var(--text);font-size:15px;background:rgba(255,255,255,.02)}
.cmp thead th small{display:block;font-size:11px;color:var(--text-faint);font-weight:400;margin-top:2px}
.cmp tbody th{color:var(--text-dim);font-weight:500}
.cmp td{color:var(--text-dim)}
.cmp .hl{background:linear-gradient(180deg,rgba(52,224,200,.07),rgba(91,124,255,.05));color:var(--text)}
.cmp thead .hl{color:var(--cyan)}
.cmp tbody tr:last-child th,.cmp tbody tr:last-child td{border-bottom:0}

/* 范式跃迁三阶：被看见 → 成为答案 → 被持续推荐 */
.shift{margin-top:42px}
.shift__cap{text-align:center;color:var(--text-dim);font-size:15px;margin-bottom:26px}
.shift__cap b{color:var(--gold);font-weight:600}
.shift__track{display:flex;align-items:stretch;gap:10px}
.shift__arrow{align-self:center;color:var(--text-faint);font-size:20px;flex-shrink:0}
.shift__step{flex:1;display:flex;flex-direction:column;gap:11px;padding:24px 22px;border-radius:var(--r-lg);border:1px solid var(--line);background:rgba(255,255,255,.02);transition:transform .35s var(--ease),border-color .35s}
.shift__step:hover{transform:translateY(-4px)}
.shift__tier{font-family:var(--font-display);font-size:13px;letter-spacing:.14em;color:var(--text-faint);display:flex;align-items:center}
.shift__step--geo .shift__tier{color:var(--indigo)}
.shift__step h3{font-size:17px}
.shift__step p{font-size:13.5px;color:var(--text-dim);flex:1;line-height:1.65}
.shift__tag{align-self:flex-start;font-family:var(--font-display);font-size:11.5px;padding:3px 11px;border-radius:999px;border:1px solid var(--line-2);color:var(--text-dim)}
.shift__step--apex{border-color:rgba(52,224,200,.42);background:linear-gradient(180deg,rgba(52,224,200,.09),rgba(91,124,255,.045));box-shadow:0 16px 50px rgba(30,80,160,.25)}
.shift__step--apex .shift__tier{color:var(--cyan)}
.shift__step--apex h3{color:#fff}
.shift__tier em{font-style:normal;font-size:10px;color:#04130f;background:var(--grad-gold);padding:2px 8px;border-radius:999px;margin-left:9px;letter-spacing:.02em}
.shift__tag--gold{color:var(--gold);border-color:rgba(216,182,107,.4);background:rgba(216,182,107,.08)}
@media (max-width:760px){
  .shift__track{flex-direction:column}
  .shift__arrow{transform:rotate(90deg)}
}

/* ============================================================
   两仪 · 太极
   ============================================================ */
.taiji-layout{display:grid;grid-template-columns:1fr auto 1fr;gap:clamp(24px,3vw,44px);align-items:center}
.yi{padding:30px 28px;border-radius:var(--r-lg);border:1px solid var(--line);position:relative;overflow:hidden}
.yi__label{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-display);font-size:12px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:14px}
.yi__label em{font-style:normal;font-size:10px;color:#04130f;background:var(--grad-gold);padding:2px 8px;border-radius:999px;letter-spacing:.02em}
.yi h3{margin-bottom:12px;font-size:22px}
.yi p{color:var(--text-dim);font-size:14.5px}
.yi--passive{background:linear-gradient(180deg,rgba(255,255,255,.02),transparent)}
.yi--passive .yi__label{color:var(--text-dim)}
.yi--active{background:linear-gradient(180deg,rgba(52,224,200,.07),rgba(91,124,255,.04));border-color:rgba(52,224,200,.22)}
.yi--active .yi__label{color:var(--cyan)}
.taiji{filter:drop-shadow(0 8px 30px rgba(52,224,200,.3));animation:spin 26s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.taiji,.is-spin{animation:none}}

/* ============================================================
   五段闭环
   ============================================================ */
.loop{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:16px;counter-reset:none}
.loop__step{position:relative;padding:26px 20px;border-radius:var(--r);border:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.03),transparent);transition:transform .35s var(--ease),border-color .35s}
.loop__step:not(:last-child)::after{content:"→";position:absolute;right:-14px;top:34px;color:var(--text-faint);font-size:18px;z-index:2}
.loop__step:hover{transform:translateY(-5px);border-color:var(--line-2)}
.loop__step.is-pivot{border-color:rgba(216,182,107,.4);background:linear-gradient(180deg,rgba(216,182,107,.08),transparent)}
.loop__no{font-family:var(--font-display);font-size:13px;color:var(--cyan);letter-spacing:.1em}
.loop__step.is-pivot .loop__no{color:var(--gold)}
.loop__step h3{margin:8px 0 10px;font-size:18px;display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.loop__step h3 small{font-size:11px;font-weight:400;color:var(--text-faint);font-family:var(--font-body)}
.loop__step p{font-size:13px;color:var(--text-dim);line-height:1.6}

.compiler{margin-top:40px;border:1px solid var(--line);border-radius:var(--r-lg);padding:28px;background:rgba(255,255,255,.015);text-align:center}
.compiler__cap{font-family:var(--font-display);font-size:13px;letter-spacing:.06em;color:var(--gold);margin-bottom:20px}
.compiler__pair{display:grid;grid-template-columns:1fr auto 1fr;gap:18px;align-items:center;max-width:820px;margin:0 auto;text-align:left}
.compiler__before,.compiler__after{padding:18px 20px;border-radius:var(--r);border:1px solid var(--line)}
.compiler__before{background:rgba(240,114,126,.05);border-color:rgba(240,114,126,.2)}
.compiler__after{background:rgba(52,224,200,.06);border-color:rgba(52,224,200,.25)}
.compiler__before span,.compiler__after span{display:block;font-family:var(--font-display);font-size:11px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:8px}
.compiler__before span{color:var(--danger)} .compiler__after span{color:var(--cyan)}
.compiler__before p,.compiler__after p{font-size:15px;color:var(--text)}
.compiler__arrow{font-size:26px;color:var(--text-faint)}
.compiler__note{margin-top:20px;font-size:13px;color:var(--text-faint)}
.compiler__note em{color:var(--text-dim);font-style:normal}

/* ============================================================
   Agent 集群
   ============================================================ */
.card--agent{padding:26px 24px}
.agent__seg{display:inline-block;font-family:var(--font-display);font-size:11px;letter-spacing:.08em;color:var(--indigo);border:1px solid rgba(91,124,255,.3);background:rgba(91,124,255,.08);border-radius:999px;padding:3px 11px;margin-bottom:14px}
.agent__seg--pivot{color:var(--gold);border-color:rgba(216,182,107,.4);background:rgba(216,182,107,.1)}

/* ============================================================
   平台覆盖
   ============================================================ */
.coverage{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.coverage__col{padding:26px;border:1px solid var(--line);border-radius:var(--r-lg);background:rgba(255,255,255,.015)}
.coverage__label{font-family:var(--font-display);font-size:13px;letter-spacing:.06em;color:var(--cyan);margin-bottom:18px}
/* 平台徽标：品牌色单字图标 + 名称，错峰呼吸辉光（实时监测质感） */
.plats{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:10px}
.plat{display:inline-flex;align-items:center;gap:9px;font-size:14px;color:var(--text);padding:7px 15px 7px 7px;border-radius:999px;border:1px solid var(--line-2);background:rgba(255,255,255,.03);transition:transform .25s var(--ease),border-color .25s,color .25s}
.plat:hover{border-color:var(--c);transform:translateY(-2px);color:#fff}
.plat__ic{position:relative;width:28px;height:28px;flex-shrink:0;border-radius:8px;overflow:hidden;background:rgba(255,255,255,.04);animation:platTwinkle 3.4s var(--ease) infinite;animation-delay:calc(var(--i,0)*.32s)}
.plat__mono{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--font-display);font-weight:700;font-size:14px;color:#fff;background:linear-gradient(150deg,rgba(255,255,255,.28),rgba(255,255,255,0)),var(--c)}
.plat__mono.is-abbr{font-size:11px;letter-spacing:.01em}
.plat__logo{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;padding:3px;background:#fff;z-index:1}
@keyframes platTwinkle{0%,100%{box-shadow:0 0 0 0 rgba(255,255,255,0)}50%{box-shadow:0 0 11px 0 var(--c)}}
@media (prefers-reduced-motion:reduce){.plat__ic{animation:none}}
.chips{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:10px}
.chips li{font-family:var(--font-display);font-size:14px;padding:8px 16px;border-radius:10px;border:1px solid var(--line-2);background:rgba(255,255,255,.03);color:var(--text);transition:.25s var(--ease)}
.chips li:hover{border-color:var(--cyan);color:#fff;transform:translateY(-2px)}
.chips--intl .coverage__label,.chips--intl li:hover{border-color:var(--indigo)}

/* ============================================================
   数据护城河
   ============================================================ */
.moat .card{padding-left:74px}
.moat__n{position:absolute;left:26px;top:28px;font-family:var(--font-display);font-size:28px;font-weight:700;color:transparent;background:var(--grad-tech);-webkit-background-clip:text;background-clip:text;opacity:.85}
.flywheel{margin-top:36px;display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;padding:22px;border-radius:var(--r-lg);border:1px dashed rgba(216,182,107,.3);background:rgba(216,182,107,.04)}
.flywheel span{font-size:14px;color:var(--text);font-family:var(--font-display)}
.flywheel i{color:var(--gold);font-style:normal;font-size:16px}

/* ============================================================
   合规
   ============================================================ */
.compliance__list{list-style:none;margin:0 auto;padding:0;display:flex;flex-wrap:wrap;justify-content:center;gap:16px;max-width:1040px}
.compliance__list li{flex:1 1 300px;max-width:392px;padding:24px;border-radius:var(--r);border:1px solid var(--line);background:rgba(255,255,255,.02);display:grid;gap:8px}
.compliance__list li:hover{border-color:rgba(65,214,140,.35)}
.compliance__list b{font-family:var(--font-display);font-size:16px;color:#fff;display:flex;align-items:center;gap:10px}
.compliance__list b::before{content:"✓";color:var(--good);font-size:14px}
.compliance__list span{color:var(--text-dim);font-size:14px}

/* ============================================================
   定价
   ============================================================ */
.plan{position:relative;display:flex;flex-direction:column;padding:30px 22px;border-radius:var(--r-lg);border:1px solid var(--line);background:linear-gradient(180deg,rgba(255,255,255,.03),transparent);transition:transform .35s var(--ease),border-color .35s}
.plan:hover{transform:translateY(-5px)}
.plan--featured{border-color:rgba(52,224,200,.4);background:linear-gradient(180deg,rgba(52,224,200,.08),rgba(91,124,255,.04));box-shadow:0 20px 60px rgba(30,80,160,.3)}
.plan__badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);font-family:var(--font-display);font-size:11.5px;letter-spacing:.06em;color:#04130f;background:var(--grad-tech);padding:5px 16px;border-radius:999px;white-space:nowrap}
.plan--premium{border-color:rgba(216,182,107,.45);background:linear-gradient(180deg,rgba(216,182,107,.09),rgba(201,159,78,.03));box-shadow:0 20px 60px rgba(120,90,30,.22)}
.plan--premium li::before{border-color:var(--gold)}
.plan__badge--gold{color:#1c1404;background:var(--grad-gold)}
.plan h3{font-size:21px;margin-bottom:8px}
.plan__for{color:var(--text-dim);font-size:12.5px;min-height:48px;margin-bottom:18px;line-height:1.6}
.plan ul{list-style:none;margin:0 0 22px;padding:0;display:grid;gap:10px;flex:1}
.plan li{position:relative;padding-left:22px;font-size:13.5px;color:var(--text-dim)}
.plan li::before{content:"";position:absolute;left:0;top:8px;width:13px;height:7px;border-left:2px solid var(--cyan);border-bottom:2px solid var(--cyan);transform:rotate(-45deg)}

/* ============================================================
   路线图
   ============================================================ */
.timeline{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:0;position:relative}
.timeline::before{content:"";position:absolute;left:0;right:0;top:13px;height:2px;background:linear-gradient(90deg,var(--cyan),var(--indigo),var(--violet))}
.timeline li{position:relative;padding:40px 24px 0 0}
.timeline li::before{content:"";position:absolute;left:0;top:6px;width:16px;height:16px;border-radius:50%;background:var(--ink-900);border:3px solid var(--cyan);box-shadow:0 0 0 4px rgba(52,224,200,.15)}
.timeline li:nth-child(2)::before{border-color:var(--indigo);box-shadow:0 0 0 4px rgba(91,124,255,.15)}
.timeline li:nth-child(3)::before{border-color:var(--violet);box-shadow:0 0 0 4px rgba(140,108,240,.15)}
.timeline__ph{font-family:var(--font-display);font-size:13px;color:var(--cyan);letter-spacing:.06em}
.timeline__t{display:block;font-family:var(--font-display);font-weight:600;font-size:16px;color:#fff;margin:6px 0 10px}
.timeline li p{color:var(--text-dim);font-size:14px;padding-right:12px}

/* ============================================================
   中杼生态 · 四象
   ============================================================ */
.section--eco{background:radial-gradient(ellipse 70% 90% at 50% 0%,rgba(140,108,240,.12),transparent 60%),var(--ink-850)}
.sixiang{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.xiang{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;padding:36px 18px;border-radius:var(--r-lg);border:1px solid var(--line);background:rgba(255,255,255,.02);text-align:center;transition:.3s var(--ease)}
.xiang b{font-family:var(--font-display);font-size:24px;letter-spacing:.02em}
.xiang span{font-size:13px;color:var(--text-dim)}
.xiang:hover{transform:translateY(-4px);border-color:var(--line-2);background:rgba(255,255,255,.04)}
.xiang--here{border-color:rgba(52,224,200,.45);background:linear-gradient(180deg,rgba(52,224,200,.1),rgba(91,124,255,.05))}
.xiang--here b{background:var(--grad-tech);-webkit-background-clip:text;background-clip:text;color:transparent}
.xiang--here em{position:absolute;top:-11px;font-style:normal;font-family:var(--font-display);font-size:11px;color:#04130f;background:var(--grad-tech);padding:3px 12px;border-radius:999px}
.bagua{text-align:center;margin-top:26px;color:var(--text-faint);font-size:13.5px}
.bagua a{color:var(--text-dim)}
.bagua a:hover{color:var(--cyan)}

/* ============================================================
   FAQ
   ============================================================ */
.faq{display:grid;gap:12px}
.faq__item{border:1px solid var(--line);border-radius:var(--r);background:rgba(255,255,255,.02);overflow:hidden;transition:border-color .3s}
.faq__item[open]{border-color:rgba(52,224,200,.3)}
.faq__item summary{cursor:pointer;list-style:none;padding:20px 24px;font-family:var(--font-display);font-weight:500;font-size:16px;color:var(--text);display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq__item summary::-webkit-details-marker{display:none}
.faq__item summary::after{content:"+";font-size:22px;color:var(--cyan);transition:transform .3s var(--ease);flex-shrink:0}
.faq__item[open] summary::after{transform:rotate(45deg)}
.faq__a{padding:0 24px 22px}
.faq__a p{color:var(--text-dim);font-size:14.5px;line-height:1.75}

/* ============================================================
   CTA
   ============================================================ */
.cta{position:relative;padding:var(--sp-section) 0;overflow:hidden;border-top:1px solid var(--line)}
.cta__bg{position:absolute;inset:0;z-index:0}
.cta__bg .hero__glow{top:auto;bottom:-200px;left:50%;transform:translateX(-50%);opacity:.4}
.cta__inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,64px);align-items:center}
.cta__copy h2{margin-bottom:16px}
.cta__copy p{color:var(--text-dim);font-size:16px;max-width:440px}
.cta__contacts{list-style:none;margin:28px 0 0;padding:0;display:grid;gap:12px}
.cta__contacts li{display:flex;gap:14px;align-items:baseline;font-size:14.5px;color:var(--text-dim)}
.cta__contacts span{font-family:var(--font-display);font-size:12px;color:var(--text-faint);min-width:36px}
.cta__contacts a:hover{color:var(--cyan)}
.cta__form{background:linear-gradient(180deg,rgba(20,28,52,.7),rgba(12,17,34,.7));border:1px solid var(--line-2);border-radius:var(--r-xl);padding:30px;display:grid;gap:16px;box-shadow:var(--shadow)}
.cta__form label{display:grid;gap:7px;font-size:13px;color:var(--text-dim);font-family:var(--font-display)}
.cta__form input{font-family:var(--font-body);font-size:15px;color:var(--text);background:rgba(255,255,255,.04);border:1px solid var(--line-2);border-radius:12px;padding:13px 16px;transition:border-color .25s,background .25s}
.cta__form input::placeholder{color:var(--text-faint)}
.cta__form input:focus{outline:none;border-color:var(--cyan);background:rgba(52,224,200,.05)}
.cta__form-note{font-size:12px;color:var(--text-faint);text-align:center;margin-top:4px}

/* ============================================================
   页脚
   ============================================================ */
.footer{background:var(--ink-850);border-top:1px solid var(--line);padding:clamp(48px,6vw,72px) 0 32px}
.footer__inner{display:grid;grid-template-columns:1.3fr 2fr;gap:40px;padding-bottom:40px;border-bottom:1px solid var(--line)}
.footer__brand .brand{margin-bottom:14px}
.footer__brand p{color:var(--text-dim);font-size:13.5px;margin-bottom:4px}
.footer__creed{color:var(--gold)!important;font-family:var(--font-display);letter-spacing:.1em;margin-top:10px!important}
.footer__cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer__cols h4{font-family:var(--font-display);font-size:13px;letter-spacing:.06em;color:var(--text);margin-bottom:16px;text-transform:uppercase}
.footer__cols a{display:block;color:var(--text-dim);font-size:14px;padding:5px 0}
.footer__cols a:hover{color:var(--cyan)}
.footer__legal{padding-top:28px;text-align:center;display:grid;gap:8px}
.footer__legal p{color:var(--text-faint);font-size:12.5px}
.footer__legal a{color:var(--text-faint)}
.footer__legal a:hover{color:var(--text-dim)}
.footer__disclaim{max-width:680px;margin:6px auto 0;opacity:.8}

/* 回到顶部 */
.backtop{position:fixed;right:24px;bottom:24px;width:46px;height:46px;display:grid;place-items:center;border-radius:50%;background:var(--grad-tech);color:#04130f;font-size:20px;font-weight:700;box-shadow:var(--shadow);opacity:0;transform:translateY(20px) scale(.8);pointer-events:none;transition:.35s var(--ease);z-index:90}
.backtop.is-show{opacity:1;transform:none;pointer-events:auto}

/* ---------- 滚动揭示动画 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:980px){
  .hero__inner{grid-template-columns:1fr;gap:40px}
  .hero__demo{max-width:480px}
  .compliance{grid-template-columns:1fr}
  .compliance__copy{position:static}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .cta__inner{grid-template-columns:1fr}
  .loop{grid-template-columns:repeat(2,1fr)}
  .loop__step:not(:last-child)::after{display:none}
  .footer__inner{grid-template-columns:1fr;gap:32px}
}
@media (max-width:860px){
  /* 顶栏折叠规则见文件末 @media(max-width:960px) 抽屉式导航 */
  .grid-3{grid-template-columns:1fr 1fr}
  .taiji-layout{grid-template-columns:1fr;text-align:center}
  .taiji{margin:0 auto;order:-1}
  .timeline{grid-template-columns:1fr;gap:8px}
  .timeline::before{left:7px;right:auto;top:0;bottom:0;width:2px;height:auto}
  .timeline li{padding:8px 0 24px 34px}
  .timeline li::before{left:0}
  .sixiang{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:560px){
  .eco-ribbon__list{gap:12px}
  .eco-ribbon__list a span,.eco-ribbon__list .is-here span,.eco-ribbon__brand,.eco-ribbon__home{display:none}
  .hero__stats{grid-template-columns:repeat(2,1fr);gap:24px 12px}
  .grid-2,.grid-3,.coverage,.pricing,.sixiang{grid-template-columns:1fr}
  .loop{grid-template-columns:1fr}
  .compiler__pair{grid-template-columns:1fr;text-align:center}
  .compiler__arrow{transform:rotate(90deg)}
  .cta__form{padding:22px}
  .section__head{text-align:left}
  .section__head .kicker{margin-bottom:14px}
}

/* 无障碍：键盘焦点 */
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:4px}

/* ============================================================
   多页：品牌响应式 · 子页 banner · 导流卡 · 指标板 · 四栏页脚 · 抽屉导航
   ============================================================ */
@media (max-width:1140px){.brand__text small{display:none}}

/* 子页 banner */
.page-hero{position:relative;overflow:hidden;padding:clamp(46px,7vw,86px) 0 clamp(34px,4vw,54px);border-bottom:1px solid var(--line);text-align:center}
.page-hero__bg{position:absolute;inset:0;z-index:0;pointer-events:none}
.page-hero__bg .hero__glow{top:-170px;left:50%;transform:translateX(-50%);opacity:.4}
.page-hero>.container{position:relative;z-index:1}
.page-hero__title{font-size:clamp(30px,4.6vw,52px);line-height:1.16;letter-spacing:-.01em;margin:16px auto;max-width:18ch;text-wrap:balance}
.page-hero__sub{color:var(--text-dim);font-size:clamp(15px,1.4vw,18px);max-width:700px;margin:0 auto;line-height:1.7;text-wrap:pretty}
.page-hero .hero__actions{justify-content:center;margin-top:26px}

/* 导流卡（首页能力概览） */
.card--link{display:flex;flex-direction:column;gap:10px}
.card--link h3{color:#fff;display:flex;align-items:center;justify-content:space-between;gap:10px}
.card--link .arrow{color:var(--cyan);transition:transform .3s var(--ease)}
.card--link:hover .arrow{transform:translateX(5px)}

/* 指标板（解决方案页 ROI） */
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.metric{padding:26px 24px;border-radius:var(--r-lg);border:1px solid var(--line);background:rgba(255,255,255,.015)}
.metric h3{font-size:17px;margin-bottom:16px;display:flex;align-items:center;gap:9px}
.metric h3::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--grad-tech);flex-shrink:0}
.metric ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.metric li{position:relative;padding-left:18px;font-size:13.5px;color:var(--text-dim);line-height:1.55}
.metric li::before{content:"";position:absolute;left:3px;top:8px;width:6px;height:6px;border-radius:50%;background:var(--cyan);opacity:.7}

/* 商业模式行（定价页） */
.bizmodel{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:8px}
.bizmodel .card h3{margin-bottom:10px}

/* 四栏页脚 */
.footer__inner{grid-template-columns:1.1fr 2.6fr}
.footer__cols{grid-template-columns:repeat(4,1fr)}

@media (max-width:760px){.metrics,.bizmodel{grid-template-columns:1fr}}

/* 抽屉式导航（顶栏折叠） */
@media (max-width:960px){
  .nav__drawer{display:none}
  .nav__toggle{display:flex}
  .nav.is-open .nav__drawer{display:flex;flex-direction:column;gap:0;position:absolute;top:66px;left:0;right:0;background:rgba(9,13,26,.98);backdrop-filter:blur(18px) saturate(140%);border-bottom:1px solid var(--line);padding:10px 22px 24px;max-height:calc(100vh - 66px);overflow-y:auto}
  .nav.is-open .nav__links{flex-direction:column;align-items:stretch;gap:0;width:100%;margin:0}
  .nav.is-open .nav__item.has-menu::after{display:none}
  .nav.is-open .nav__top{padding:14px 2px;font-size:16px;border-bottom:1px solid var(--line);border-radius:0;justify-content:space-between}
  .nav.is-open .nav__top:hover{background:none}
  .nav.is-open .nav__caret{display:none}
  .nav.is-open .nav__menu{position:static;opacity:1;visibility:visible;transform:none;background:none;border:0;box-shadow:none;backdrop-filter:none;padding:6px 0 12px 14px;min-width:0}
  .nav.is-open .nav__menu a{padding:8px 0;color:var(--text-faint)}
  .nav.is-open .nav__cta{display:flex;flex-direction:column;width:100%;margin:16px 0 0;gap:10px}
}