@charset "UTF-8";
/* ==========================================================================
   光渡官网 · 共享样式（assets/site.css）
   - 全站 8 个页面共用，一次加载后跨页命中缓存
   - 变更点（SEO/性能/无障碍）统一标注 [SEO]
   ========================================================================== */
:root{
  --bg:#06070b; --ink:#eef2fb; --sub:#98a4bb; --dim:#66728a;
  --line:rgba(255,255,255,.09);
  --c1:#6ea8ff; --c2:#a78bfa; --c3:#ffc36e; --c4:#58e6ff;
  --grad:linear-gradient(100deg,#6ea8ff,#a78bfa 46%,#ffc36e);
  --r:18px;
  --nav-h:64px;                 /* [SEO] 固定顶栏高度，锚点滚动留白用 */
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);overflow-x:hidden;
  font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.22;letter-spacing:-.03em}
p{margin:0}
img{max-width:100%}
.wrap{max-width:1440px;margin:0 auto;padding:0 32px}
@media(min-width:1780px){.wrap{max-width:1600px}}
@media(max-width:600px){.wrap{padding:0 18px}}

/* [SEO] 键盘可达性：焦点可见 + 跳转链接 + 仅供屏幕阅读器/爬虫的标题 */
a:focus-visible,button:focus-visible{outline:2px solid var(--c1);outline-offset:3px;border-radius:6px}
.skip{position:absolute;left:-9999px;top:0;z-index:200;background:var(--c1);color:#080a10;
  padding:10px 16px;font-weight:700;border-radius:0 0 10px 0}
.skip:focus{left:0}
.sr-only{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;
  clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0}

.reveal{opacity:0;transform:translateY(30px);transition:opacity .85s cubic-bezier(.22,.61,.36,1),transform .85s cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}
/* [SEO] 无 JS（含不执行脚本的爬虫）时内容必须可见，否则整页正文是 opacity:0 */
.no-js .reveal{opacity:1;transform:none}

/* ---------- 顶栏 ---------- */
#prog{position:fixed;top:0;left:0;height:2px;width:0;z-index:100;background:var(--grad);box-shadow:0 0 14px rgba(167,139,250,.8)}
header{position:fixed;top:0;left:0;right:0;z-index:90;transition:.35s;border-bottom:1px solid transparent}
header.on{background:rgba(6,7,11,.7);backdrop-filter:blur(18px);border-bottom-color:var(--line)}
.nav{display:flex;align-items:center;height:var(--nav-h);gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17.5px;letter-spacing:-.03em}
.brand img{width:27px;height:27px;flex:none;border-radius:8px;box-shadow:0 0 18px rgba(122,162,255,.35)}
.brand em{font-style:normal;font-weight:600;color:var(--dim);font-size:12.5px;letter-spacing:.16em}
.nav nav{margin-left:auto;display:flex;gap:26px;font-size:14px;color:var(--sub)}
.nav nav a{position:relative;padding:4px 0;transition:.2s}
.nav nav a::after{content:"";position:absolute;left:0;right:0;bottom:0;height:1.5px;background:var(--grad);transform:scaleX(0);transform-origin:left;transition:.3s}
.nav nav a:hover,.nav nav a[aria-current="page"]{color:#fff}
.nav nav a:hover::after,.nav nav a[aria-current="page"]::after{transform:scaleX(1)}

/* [SEO] 移动端抽屉导航：原来 <920px 直接 display:none，手机上没有任何导航入口 */
.burger{margin-left:auto;display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.05);color:var(--ink);align-items:center;justify-content:center;cursor:pointer;padding:0}
.burger i{display:block;width:17px;height:1.6px;background:currentColor;position:relative}
.burger i::before,.burger i::after{content:"";position:absolute;left:0;width:17px;height:1.6px;background:currentColor;transition:.25s}
.burger i::before{top:-5.5px}.burger i::after{top:5.5px}
.burger[aria-expanded="true"] i{background:transparent}
.burger[aria-expanded="true"] i::before{transform:translateY(5.5px) rotate(45deg)}
.burger[aria-expanded="true"] i::after{transform:translateY(-5.5px) rotate(-45deg)}
#drawer{position:fixed;inset:0;z-index:89;background:rgba(6,7,11,.96);backdrop-filter:blur(14px);
  display:flex;flex-direction:column;justify-content:center;gap:6px;padding:0 32px;
  opacity:0;visibility:hidden;transition:opacity .28s}
#drawer.open{opacity:1;visibility:visible}
#drawer a{font-size:22px;font-weight:750;padding:14px 0;border-bottom:1px solid var(--line);letter-spacing:-.02em}
#drawer a small{display:block;font-size:12px;font-weight:500;color:var(--dim);letter-spacing:0;margin-top:3px}
@media(max-width:920px){
  .nav nav{display:none}
  .burger{display:flex}
}

/* ---------- HERO ---------- */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:120px 0 70px;overflow:hidden}
#lite{position:absolute;inset:0;width:100%;height:100%;display:block;opacity:.72}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(900px 520px at 16% 24%,rgba(110,168,255,.14),transparent 62%),
             radial-gradient(780px 480px at 86% 70%,rgba(167,139,250,.13),transparent 62%)}
.grid-bg{position:absolute;inset:0;pointer-events:none;opacity:.3;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:66px 66px;
  -webkit-mask-image:radial-gradient(760px 560px at 50% 44%,#000 18%,transparent 76%);
  mask-image:radial-gradient(760px 560px at 50% 44%,#000 18%,transparent 76%)}

.hero-grid{position:relative;z-index:3;display:grid;grid-template-columns:1fr 1.12fr;gap:44px;align-items:center;width:100%}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:38px;text-align:center}.hero-grid .cta,.hero-grid .chips{justify-content:center}}
.tag{display:inline-flex;align-items:center;gap:9px;padding:7px 15px;border-radius:999px;border:1px solid var(--line);background:rgba(255,255,255,.04);font-size:12.5px;color:var(--sub);backdrop-filter:blur(10px)}
.tag .live{width:6px;height:6px;border-radius:50%;background:var(--c4);box-shadow:0 0 10px var(--c4);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 12px rgba(122,162,255,.4)}50%{box-shadow:0 0 30px rgba(167,139,250,.9)}}
h1{font-size:clamp(34px,5.2vw,62px);font-weight:850;margin:22px 0 0;letter-spacing:-.04em;white-space:nowrap}
@media(max-width:900px){h1{white-space:normal}}
h1 .l1,h1 .l2{display:block}
h1 .l1{animation:up .95s cubic-bezier(.22,.61,.36,1) forwards}
h1 .l2{background:linear-gradient(100deg,#6ea8ff,#a78bfa 46%,#ffc36e,#a78bfa 74%,#6ea8ff);
  background-size:200% 100%;-webkit-background-clip:text;background-clip:text;color:transparent;
  animation:flow 8s linear infinite}
@keyframes up{from{transform:translateY(26px)}to{transform:none}}
@keyframes flow{from{background-position:0% 0}to{background-position:-200% 0}}
.sub{color:var(--sub);font-size:clamp(15.5px,1.9vw,19px);max-width:560px;margin:20px 0 0}
@media(max-width:900px){.sub{margin-inline:auto}}
.cta{display:flex;gap:13px;flex-wrap:wrap;margin-top:32px}
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 26px;border-radius:13px;font-weight:700;font-size:15px;border:1px solid transparent;transition:.25s;min-height:46px}
.btn-primary{background:var(--grad);color:#080a10;box-shadow:0 10px 34px rgba(122,162,255,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 46px rgba(167,139,250,.45)}
.btn-ghost{border-color:var(--line);background:rgba(255,255,255,.045);color:var(--ink)}
.btn-ghost:hover{border-color:rgba(255,255,255,.3);transform:translateY(-2px)}
.chips{display:flex;gap:9px;flex-wrap:wrap;margin-top:22px}
.chips span,.chips a{font-size:13px;color:#b9c4d8;border:1px solid var(--line);border-radius:999px;padding:6px 14px;transition:.25s}
.chips a:hover{color:#fff;border-color:rgba(255,255,255,.3);background:rgba(255,255,255,.05)}
.why{margin-top:22px;padding:16px 18px;border:1px solid var(--line);border-radius:14px;
  background:rgba(255,255,255,.035);max-width:640px;position:relative;overflow:hidden}
.why::after{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--grad)}
.why h2{margin:0 0 8px;font-size:11.5px;letter-spacing:.2em;color:var(--c2);font-weight:700}
.why p{margin:0 0 13px;font-size:14px;color:var(--sub)}
ol.why-list{list-style:none;padding:0;margin:0;display:grid;gap:8px}
ol.why-list li{position:relative;padding-left:60px;font-size:13.5px;color:#c6d0e4;line-height:1.55}
ol.why-list li b{position:absolute;left:0;top:0;font-weight:700;color:#fff;font-size:13px;letter-spacing:-.01em}
.why .more{margin:12px 0 0;padding-top:11px;border-top:1px dashed var(--line);font-size:12.5px;color:var(--dim);line-height:1.55}
.model{margin-top:14px;font-size:12.5px;color:var(--dim);display:flex;gap:9px;align-items:flex-start;max-width:470px}
.model i{flex:none;width:13px;height:13px;border-radius:50%;border:1px solid rgba(167,139,250,.65);display:inline-block;margin-top:4px}
@media(max-width:900px){.why,.model{margin-inline:auto;text-align:left}}

.phones{position:relative;height:580px;display:flex;align-items:center;justify-content:center}
.ph{position:absolute;width:296px;border-radius:32px;padding:8px;
  background:linear-gradient(170deg,#2b3142,#11141c);
  box-shadow:0 36px 78px rgba(0,0,0,.68),0 0 0 1px rgba(255,255,255,.07) inset;
  transition:transform .6s cubic-bezier(.22,.61,.36,1),filter .5s}
.ph img{width:100%;display:block;border-radius:25px;height:auto}
.ph figcaption{position:absolute;left:0;right:0;bottom:-30px;text-align:center;font-size:11.5px;color:var(--dim)}
.ph:nth-child(1){transform:translate(-138px,22px) rotate(-9deg) scale(.85);z-index:1;filter:brightness(.72)}
.ph:nth-child(2){transform:translateY(-8px) scale(1.04);z-index:3}
.ph:nth-child(3){transform:translate(138px,22px) rotate(9deg) scale(.85);z-index:2;filter:brightness(.72)}
.phones:hover .ph:nth-child(1){transform:translate(-244px,8px) rotate(-12deg) scale(.93);filter:none}
.phones:hover .ph:nth-child(3){transform:translate(244px,8px) rotate(12deg) scale(.93);filter:none}
.ph::after{content:"";position:absolute;inset:-32px;z-index:-1;border-radius:50%;
  background:radial-gradient(closest-side,rgba(122,162,255,.2),transparent 70%);filter:blur(28px)}
@media(max-width:1100px){
  .phones{height:420px}
  .ph{width:210px}
  .ph:nth-child(1),.phones:hover .ph:nth-child(1){transform:translate(-104px,16px) rotate(-7deg) scale(.86);filter:brightness(.78)}
  .ph:nth-child(3),.phones:hover .ph:nth-child(3){transform:translate(104px,16px) rotate(7deg) scale(.86);filter:brightness(.78)}
}
.hint{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);z-index:3;color:var(--dim);font-size:11px;letter-spacing:.22em;display:flex;flex-direction:column;align-items:center;gap:9px}
.hint i{width:1px;height:32px;background:linear-gradient(var(--c2),transparent);animation:drop 2s ease-in-out infinite}
@keyframes drop{0%{transform:scaleY(0);transform-origin:top}45%{transform:scaleY(1);transform-origin:top}46%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ---------- 通用区块 ---------- */
.sec{padding:110px 0;position:relative;scroll-margin-top:calc(var(--nav-h) + 12px)}
.eyebrow{font-size:11.5px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--c2);margin-bottom:14px;display:flex;align-items:center;gap:10px}
.eyebrow.key{color:var(--c3)}
.eyebrow .dot{width:5px;height:5px;border-radius:50%;background:currentColor;box-shadow:0 0 10px currentColor}
.eyebrow .tail{font-size:11px;letter-spacing:.08em;color:var(--dim);font-weight:600}
h2{font-size:clamp(27px,3.9vw,44px);font-weight:830;letter-spacing:-.038em}
.lede{color:var(--sub);max-width:640px;margin:14px 0 0;font-size:16.5px}
@media(max-width:900px){.sec{padding:64px 0}}

/* ---------- 两种连接方式 ---------- */
.ways{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:38px}
@media(max-width:960px){.ways{grid-template-columns:1fr}}
.way{position:relative;border:1px solid var(--line);border-radius:var(--r);padding:24px 22px;background:rgba(255,255,255,.03);overflow:hidden;transition:.35s}
.way::before{content:"";position:absolute;inset:0;opacity:0;transition:.4s;pointer-events:none;
  background:radial-gradient(320px circle at 50% 0%,rgba(110,168,255,.16),transparent 64%)}
.way:hover{transform:translateY(-6px);border-color:rgba(255,255,255,.22)}
.way:hover::before{opacity:1}
.way .n{font-size:11.5px;font-weight:800;letter-spacing:.18em;color:var(--c1)}
.way h3{font-size:20px;font-weight:800;margin-top:8px}
.way p{margin:9px 0 0;color:var(--sub);font-size:14px}
.way .sp{display:inline-block;margin-top:13px;font-size:12px;color:var(--dim);border:1px solid var(--line);border-radius:999px;padding:5px 12px}

/* ---------- 图文横条 ---------- */
.story{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:58px 0;border-top:1px solid var(--line)}
.story.rev .story-t{order:2}
.story-t h3{font-size:clamp(22px,2.5vw,31px);font-weight:830}
.story-t > p{margin:14px 0 0;color:var(--sub);font-size:15.5px;max-width:560px}
.story-t ul{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:9px}
.story-t ul li{position:relative;padding-left:18px;font-size:14.5px;color:#c3cde2}
.story-t ul li::before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:50%;background:var(--grad)}
.story-m{display:flex;gap:18px;justify-content:center;align-items:center}
.story-m img{width:224px;border-radius:24px;padding:6px;background:linear-gradient(170deg,#2b3142,#11141c);
  box-shadow:0 24px 52px rgba(0,0,0,.58),0 0 0 1px rgba(255,255,255,.07) inset;transition:.45s;height:auto}
.story-m img:hover{transform:translateY(-9px) scale(1.03)}
.story-m.two img:nth-child(1){transform:translateY(16px) rotate(-2.4deg)}
.story-m.two img:nth-child(2){transform:translateY(-10px) rotate(2.4deg)}
.story-m.two img:hover{transform:translateY(-10px) scale(1.04) rotate(0deg)}
.story-m.three img{width:172px}
.story-m.three img:nth-child(1){transform:translateY(16px) rotate(-3deg)}
.story-m.three img:nth-child(2){transform:translateY(-12px) scale(1.05)}
.story-m.three img:nth-child(3){transform:translateY(16px) rotate(3deg)}
.story-m.three img:hover{transform:translateY(-12px) scale(1.06) rotate(0deg)}
@media(max-width:900px){.story-m.three img{width:110px}}
@media(max-width:900px){
  .story{grid-template-columns:1fr;gap:28px;padding:42px 0}
  .story.rev .story-t{order:0}
  .story-m img{width:148px}
}

/* ---------- 痛点对照 ---------- */
.pains{margin-top:40px;border-top:1px solid var(--line)}
.pain{display:grid;grid-template-columns:1fr 44px 1.15fr;align-items:center;gap:20px;padding:22px 4px;border-bottom:1px solid var(--line);position:relative;transition:.3s}
.pain .no{color:var(--dim);font-size:15.5px;transition:.3s}
.pain:hover .no{color:#8590a6}
.pain .yes{color:#fff;font-weight:640;font-size:16px}
.pain .yes em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:820}
.pain .ar{justify-self:center;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--c2);font-size:14px;transition:.35s}
.pain:hover .ar{background:var(--grad);color:#080a10;transform:scale(1.15)}
@media(max-width:700px){.pain{grid-template-columns:1fr;gap:8px;padding:18px 0}.pain .ar{justify-self:start;transform:rotate(90deg)}.pain:hover .ar{transform:rotate(90deg) scale(1.15)}}

/* ---------- BENTO ---------- */
.bento{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:42px}
@media(max-width:1000px){.bento{grid-template-columns:repeat(2,1fr)}}
/* ---------- 功能总览：问题 → 功能 → 解决，整卡可点 ---------- */
.feat{margin-top:34px}
.feat .cell{display:flex;flex-direction:column;min-height:0;padding:22px;color:inherit;text-decoration:none}
.feat .cell .ico{margin-bottom:12px}
.feat .prob{margin:0 0 6px;font-size:13px;color:rgba(255,195,110,.88);line-height:1.5}
.feat .cell h3{font-size:17px}
.feat .go{margin-top:auto;padding-top:12px;font-size:13px;color:var(--c1)}
@media(max-width:560px){.bento.feat{grid-template-columns:1fr;gap:10px}.feat .cell{padding:16px 18px}.feat .cell .ico{display:none}.feat .go{padding-top:8px}}
@media(max-width:600px){.bento{grid-template-columns:1fr}}
.cell{position:relative;grid-column:span 2;border:1px solid var(--line);border-radius:var(--r);padding:26px;background:rgba(255,255,255,.03);overflow:hidden;transition:.35s cubic-bezier(.22,.61,.36,1);min-height:150px}
.cell.sm{grid-column:span 1}
@media(max-width:1000px){.cell{grid-column:span 2}.cell.sm{grid-column:span 1}}
@media(max-width:600px){.cell,.cell.sm{grid-column:span 1}}
.cell::before{content:"";position:absolute;inset:0;opacity:0;transition:.4s;pointer-events:none;
  background:radial-gradient(320px circle at var(--mx,50%) var(--my,50%),rgba(122,162,255,.16),transparent 62%)}
.cell:hover{transform:translateY(-6px);border-color:rgba(255,255,255,.22)}
.cell:hover::before{opacity:1}
.cell .ico{width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.07);border:1px solid var(--line);margin-bottom:15px}
.cell .ico svg{width:21px;height:21px;fill:none;stroke:#fff;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.cell h3{font-size:17.5px;font-weight:740}
.cell p{margin:7px 0 0;color:var(--sub);font-size:14px}
.cell .tl{font-size:12.5px;color:var(--dim);margin-top:12px}
.c1 .ico svg{stroke:var(--c1)}.c2 .ico svg{stroke:var(--c4)}.c3 .ico svg{stroke:var(--c3)}.c4 .ico svg{stroke:var(--c2)}

.all{margin-top:36px;padding-top:28px;border-top:1px solid var(--line)}
.all h3{margin:0 0 14px;font-size:12px;letter-spacing:.18em;color:var(--dim);font-weight:700}
.tagcloud{display:flex;flex-wrap:wrap;gap:9px}
.tagcloud span{font-size:13px;color:#b9c4d8;border:1px solid var(--line);background:rgba(255,255,255,.03);border-radius:999px;padding:6px 14px;transition:.25s}
.tagcloud span:hover{color:#fff;border-color:rgba(255,255,255,.3);background:rgba(255,255,255,.08);transform:translateY(-2px)}

/* ---------- 数字 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:38px}
@media(max-width:760px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{border:1px solid var(--line);border-radius:var(--r);padding:28px 18px;background:rgba(255,255,255,.03);text-align:center;transition:.3s}
.stat:hover{border-color:rgba(255,255,255,.22);transform:translateY(-5px)}
.stat b{display:block;font-size:clamp(30px,4.4vw,46px);font-weight:860;letter-spacing:-.045em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:12.5px;color:var(--dim);letter-spacing:.05em}

/* ---------- 隐私 ---------- */
.band{position:relative;border:1px solid var(--line);border-radius:26px;padding:48px;overflow:hidden;
  background:linear-gradient(140deg,rgba(110,168,255,.11),rgba(167,139,250,.07) 50%,rgba(255,195,110,.06))}
.band::before{content:"";position:absolute;inset:-40%;background:conic-gradient(from 0deg,transparent,rgba(122,162,255,.4),transparent 30%);animation:spin 11s linear infinite;filter:blur(40px);opacity:.55}
@keyframes spin{to{transform:rotate(360deg)}}
.band>*{position:relative;z-index:1}
.band h2,.band h3{font-size:clamp(24px,3.1vw,34px);font-weight:830}
.band p{color:#c2ccdf;margin:12px 0 0;max-width:620px;font-size:16px}
.pts{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.pts span{border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);border-radius:999px;padding:7px 15px;font-size:13.5px;transition:.25s}
.pts span:hover{background:rgba(255,255,255,.14);transform:translateY(-2px)}
@media(max-width:600px){.band{padding:28px 20px}}

/* ---------- 下载 ---------- */
.dl{display:flex;gap:22px;align-items:center;flex-wrap:wrap;border:1px solid var(--line);border-radius:var(--r);padding:28px;background:rgba(255,255,255,.03);margin-top:28px;position:relative;overflow:hidden}
.dl::after{content:"";position:absolute;right:-70px;top:-70px;width:230px;height:230px;border-radius:50%;background:radial-gradient(circle,rgba(167,139,250,.24),transparent 70%)}
.dl .meta{flex:1;min-width:230px;position:relative;z-index:1}
.dl .meta b{font-size:17px}
.dl .meta p{margin:6px 0 0;color:var(--sub);font-size:14px}
.dl .btn{position:relative;z-index:1}

/* ==========================================================================
   [SEO] 子页面通用版式：面包屑 / 正文 / 步骤 / FAQ / 表格 / 相关内链
   ========================================================================== */
.page-hero{padding:calc(var(--nav-h) + 72px) 0 40px;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(760px 420px at 22% 10%,rgba(110,168,255,.13),transparent 60%),
             radial-gradient(620px 380px at 82% 60%,rgba(167,139,250,.11),transparent 62%)}
.page-hero .wrap{position:relative;z-index:1}
.page-hero h1{font-size:clamp(28px,4.4vw,50px);white-space:normal}
.page-hero .lede{margin-top:16px;max-width:720px}
@media(max-width:900px){.page-hero{padding:calc(var(--nav-h) + 44px) 0 24px}}

nav.crumbs{font-size:13px;color:var(--dim);display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:18px}
nav.crumbs a{color:var(--sub)}
nav.crumbs a:hover{color:#fff}
nav.crumbs span[aria-current]{color:var(--sub)}
nav.crumbs .sep{opacity:.45}

.prose{max-width:760px}
.prose h2{font-size:clamp(22px,2.9vw,32px);margin-top:56px}
.prose h3{font-size:clamp(18px,2.2vw,23px);margin-top:34px}
.prose p{margin:14px 0 0;color:#c3cde2;font-size:16px}
.prose ul,.prose ol{margin:14px 0 0;padding-left:22px;color:#c3cde2}
.prose li{margin:7px 0}
.prose li::marker{color:var(--c1)}
.prose strong{color:#fff}
.prose a{color:var(--c1);border-bottom:1px solid rgba(110,168,255,.4)}
.prose a:hover{border-bottom-color:var(--c1)}
.prose figure{margin:26px 0 0}
.prose figure img{border-radius:16px;border:1px solid var(--line);width:100%;height:auto}
.prose figcaption{margin-top:9px;font-size:12.5px;color:var(--dim)}
.callout{margin-top:22px;border:1px solid var(--line);border-left:2px solid var(--c2);border-radius:14px;
  padding:18px 20px;background:rgba(255,255,255,.035);font-size:14.5px;color:#c3cde2}
.callout b{color:#fff}

.steps{counter-reset:s;display:grid;gap:14px;margin-top:26px}
.steps li{counter-increment:s;list-style:none;position:relative;padding:18px 20px 18px 62px;
  border:1px solid var(--line);border-radius:14px;background:rgba(255,255,255,.03)}
.steps li::before{content:counter(s);position:absolute;left:18px;top:18px;width:28px;height:28px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;color:#080a10;background:var(--grad)}
.steps li b{display:block;color:#fff;margin-bottom:4px}
.steps li span{color:var(--sub);font-size:14.5px}

.tbl{margin-top:26px;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.tbl table{width:100%;border-collapse:collapse;font-size:14.5px}
.tbl th,.tbl td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line)}
.tbl th{background:rgba(255,255,255,.05);font-weight:700;font-size:13px;color:var(--sub)}
.tbl tr:last-child td{border-bottom:0}
.tbl td:first-child{color:#fff;font-weight:640;white-space:nowrap}
@media(max-width:600px){
  .tbl{border:0;border-radius:0}
  .tbl table{display:block}
  .tbl thead{display:none}
  .tbl tbody,.tbl tr,.tbl td{display:block;width:auto}
  .tbl tr{border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:6px 0;background:rgba(255,255,255,.03)}
  .tbl td{border:0;padding:8px 16px}
  .tbl td::before{content:attr(data-k);display:block;font-size:12px;color:var(--dim);margin-bottom:2px}
}

/* FAQ（<details> 原生，无 JS 也能展开，爬虫可读到全部文本） */
.faq{margin-top:26px;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;list-style:none;padding:18px 34px 18px 0;position:relative;font-weight:680;font-size:16px;color:#fff}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:6px;top:26px;width:9px;height:9px;
  border-right:1.6px solid var(--c2);border-bottom:1.6px solid var(--c2);transform:rotate(45deg);transition:.25s}
.faq details[open] summary::after{transform:rotate(-135deg);top:28px}
.faq .a{padding:0 34px 20px 0;color:var(--sub);font-size:15px;margin:0}
.faq .a a{color:var(--c1)}

/* 相关内链 */
.rel{margin-top:52px;padding-top:28px;border-top:1px solid var(--line)}
.rel h2{font-size:19px;font-weight:780}
.rel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:20px}
@media(max-width:860px){.rel-grid{grid-template-columns:1fr}}
.rel-card{display:block;border:1px solid var(--line);border-radius:14px;padding:20px;background:rgba(255,255,255,.03);transition:.28s}
.rel-card:hover{border-color:rgba(255,255,255,.24);transform:translateY(-4px)}
.rel-card b{display:block;color:#fff;font-size:15.5px}
.rel-card span{display:block;margin-top:6px;color:var(--dim);font-size:13.5px}

/* [SEO] 移动端吸底下载条 */
#mcta{position:fixed;left:0;right:0;bottom:0;z-index:88;display:none;
  padding:10px 14px calc(10px + env(safe-area-inset-bottom));
  background:rgba(6,7,11,.92);backdrop-filter:blur(16px);border-top:1px solid var(--line);
  transform:translateY(110%);transition:transform .3s}
#mcta.show{transform:none}
#mcta .row{display:flex;align-items:center;gap:12px}
#mcta .t{flex:1;min-width:0}
#mcta .t b{display:block;font-size:14px;color:#fff}
#mcta .t span{font-size:11.5px;color:var(--dim)}
#mcta .btn{padding:10px 18px;min-height:42px;font-size:14px}
@media(max-width:920px){#mcta{display:block}body{padding-bottom:66px}}

footer{border-top:1px solid var(--line);padding:34px 0;margin-top:40px;color:var(--dim);font-size:12.5px}
footer .row{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer .sitemap{display:flex;flex-wrap:wrap;gap:8px 18px;margin-top:14px;padding-top:14px;border-top:1px solid var(--line)}
footer .sitemap a{color:var(--sub)}
footer .sitemap a:hover{color:#fff}
@media(max-width:600px){footer{padding-bottom:20px}}

@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}
  h1 .l1{opacity:1;transform:none}
  h1 .l2{color:#8fb4ff;-webkit-text-fill-color:#8fb4ff}}