:root{
  --main:#6d5dfc;
  --accent:#22d3ee;
  --bg:#0f1020;
  --text:#e8eaf6;
  --line:rgba(232,234,246,.16);
  --muted:rgba(232,234,246,.58);
  --card:rgba(232,234,246,.03);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:"Inter","Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-weight:400;
  line-height:1.75;
  margin:0;
  overflow-x:hidden;
}
h1,h2,h3,h4,.serif{
  font-family:"Source Han Serif SC","Noto Serif SC","Songti SC","SimSun",serif;
  font-weight:700;
  letter-spacing:.01em;
}
a{color:var(--text);text-decoration:none;}
a:hover{color:var(--accent);}
img{max-width:100%;display:block;}
::selection{background:var(--main);color:#fff;}

/* ---------- nav ---------- */
.nav-top{
  position:sticky;top:0;z-index:1000;
  background:rgba(15,16,32,.9);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:1280px;margin:0 auto;padding:14px 22px;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
}
.brand{
  font-family:"Source Han Serif SC","Noto Serif SC",serif;
  font-size:22px;font-weight:800;letter-spacing:.06em;
  color:var(--text);display:flex;align-items:center;gap:9px;white-space:nowrap;
}
.brand i{color:var(--accent);font-size:19px;}
.brand:hover{color:var(--text);}
.nav-links{display:flex;align-items:center;gap:6px;flex-wrap:wrap;}
.nav-links a{
  font-size:14.5px;padding:7px 13px;border-radius:2px;
  color:var(--muted);border:1px solid transparent;transition:.22s;
  letter-spacing:.04em;
}
.nav-links a:hover,.nav-links a.active{color:var(--text);border-color:var(--line);background:rgba(109,93,252,.12);}
.nav-toggle{display:none;background:none;border:1px solid var(--line);color:var(--text);padding:6px 11px;border-radius:2px;font-size:17px;}

@media(max-width:900px){
  .nav-toggle{display:block;}
  .nav-links{
    display:none;position:absolute;top:100%;left:0;right:0;
    background:rgba(15,16,32,.98);border-bottom:1px solid var(--line);
    padding:12px 18px;flex-direction:column;align-items:stretch;gap:2px;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:10px 6px;border-bottom:1px solid rgba(232,234,246,.07);}
}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  padding:74px 22px 64px;
}
.hero-bg{
  position:absolute;inset:-30% 0;
  background:
    radial-gradient(60% 55% at 22% 30%, rgba(109,93,252,.34), transparent 70%),
    radial-gradient(52% 48% at 82% 16%, rgba(34,211,238,.20), transparent 70%),
    radial-gradient(48% 50% at 60% 88%, rgba(109,93,252,.16), transparent 70%);
  will-change:transform;
  z-index:0;
}
.hero-inner{position:relative;z-index:2;max-width:1280px;margin:0 auto;}
.hero-kicker{
  font-size:12.5px;letter-spacing:.42em;text-transform:uppercase;
  color:var(--accent);margin-bottom:20px;
}
.hero h1{
  font-size:clamp(30px,5.2vw,58px);
  line-height:1.24;margin:0 0 20px;font-weight:800;
  max-width:930px;
}
.hero h1 em{font-style:normal;color:var(--main);}
.hero p.lead-txt{
  max-width:660px;font-size:16px;color:var(--muted);
  margin-bottom:34px;line-height:1.95;
}
.tagcloud{display:flex;flex-wrap:wrap;gap:10px;max-width:900px;}
.tagcloud span{
  font-size:13.5px;padding:6px 15px;border:1px solid var(--line);
  border-radius:999px;color:var(--muted);transition:.25s;cursor:default;
  background:rgba(232,234,246,.015);
}
.tagcloud span:hover{color:var(--bg);background:var(--accent);border-color:var(--accent);}
.hero-stats{
  display:flex;gap:52px;margin-top:46px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:30px;
}
.hero-stats .num{
  font-family:"Inter",sans-serif;font-size:clamp(30px,4vw,44px);
  font-weight:800;line-height:1;color:var(--text);letter-spacing:-.02em;
}
.hero-stats .num i{font-style:normal;color:var(--accent);}
.hero-stats .lab{font-size:12.5px;letter-spacing:.2em;color:var(--muted);margin-top:10px;text-transform:uppercase;}

/* ---------- section shell ---------- */
.sec{max-width:1280px;margin:0 auto;padding:78px 22px;}
.sec-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;flex-wrap:wrap;
  border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:38px;
}
.sec-head h2{
  font-size:clamp(23px,3.1vw,34px);margin:0;line-height:1.3;
}
.sec-head h2 small{
  display:block;font-family:"Inter",sans-serif;
  font-size:12px;letter-spacing:.36em;color:var(--accent);
  font-weight:500;margin-bottom:11px;text-transform:uppercase;
}
.sec-head .desc{font-size:14px;color:var(--muted);max-width:460px;margin:0;}

/* ---------- rank ---------- */
.rank-grid{border-top:1px solid var(--line);}
.rank-row{
  display:grid;grid-template-columns:64px 1fr auto auto;
  align-items:center;gap:20px;
  padding:20px 6px;border-bottom:1px solid var(--line);
  transition:.25s;
}
.rank-row:hover{background:rgba(109,93,252,.07);padding-left:14px;}
.rank-no{
  font-family:"Inter",sans-serif;font-size:28px;font-weight:800;
  color:rgba(232,234,246,.24);letter-spacing:-.03em;
}
.rank-row:nth-child(1) .rank-no,.rank-row:nth-child(2) .rank-no,.rank-row:nth-child(3) .rank-no{color:var(--accent);}
.rank-title{font-size:17px;font-weight:600;margin:0 0 4px;}
.rank-meta{font-size:12.5px;color:var(--muted);letter-spacing:.03em;}
.rank-heat{
  font-family:"Inter",sans-serif;font-size:13px;color:var(--accent);
  border:1px solid rgba(34,211,238,.34);padding:3px 11px;border-radius:999px;
  white-space:nowrap;
}
.stars{color:var(--accent);font-size:13px;letter-spacing:.1em;white-space:nowrap;}
.stars b{color:var(--text);font-family:"Inter",sans-serif;font-weight:700;margin-left:6px;}

/* ---------- poster row ---------- */
.poster-row{
  display:grid;grid-template-columns:repeat(5,1fr);gap:22px;
}
@media(max-width:1080px){.poster-row{grid-template-columns:repeat(4,1fr);}}
@media(max-width:820px){.poster-row{grid-template-columns:repeat(3,1fr);gap:16px;}}
@media(max-width:540px){.poster-row{grid-template-columns:repeat(2,1fr);gap:13px;}}

.flip{perspective:1300px;}
.flip-inner{
  position:relative;width:100%;aspect-ratio:2/3;
  transition:transform .62s cubic-bezier(.5,.05,.3,1);
  transform-style:preserve-3d;
}
.flip.flipped .flip-inner{transform:rotateY(180deg);}
.face{
  position:absolute;inset:0;backface-visibility:hidden;
  border:1px solid var(--line);border-radius:3px;overflow:hidden;
  background:var(--card);
}
.face-front img{width:100%;height:100%;object-fit:cover;}
.face-front .badge-ep{
  position:absolute;top:0;left:0;z-index:3;
  background:var(--main);color:#fff;font-size:11px;font-weight:600;
  padding:3px 9px;letter-spacing:.03em;border-bottom-right-radius:3px;
}
.face-front .cap{
  position:absolute;left:0;right:0;bottom:0;z-index:3;
  padding:26px 11px 9px;font-size:13.5px;font-weight:600;
  background:linear-gradient(to top,rgba(15,16,32,.96),rgba(15,16,32,.5) 60%,transparent);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.face-front .cap em{
  display:block;font-style:normal;font-size:11.5px;color:var(--accent);
  font-family:"Inter",sans-serif;margin-top:3px;font-weight:500;letter-spacing:.04em;
}
.face-back{
  transform:rotateY(180deg);
  background:linear-gradient(160deg,rgba(109,93,252,.16),rgba(15,16,32,.98) 55%);
  padding:16px 14px;display:flex;flex-direction:column;font-size:12px;
}
.face-back h4{font-size:14.5px;margin:0 0 9px;line-height:1.4;color:var(--text);}
.face-back .row-t{color:var(--muted);margin-bottom:5px;line-height:1.5;}
.face-back .row-t b{color:var(--accent);font-weight:600;}
.face-back .plot{
  margin-top:7px;color:var(--muted);font-size:11.5px;line-height:1.62;
  overflow:hidden;flex:1;
  display:-webkit-box;-webkit-line-clamp:5;-webkit-box-orient:vertical;
}
.face-back .close-b{
  position:absolute;top:6px;right:6px;background:none;border:1px solid var(--line);
  color:var(--text);width:22px;height:22px;border-radius:50%;font-size:11px;
  line-height:1;display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.face-back .close-b:hover{background:var(--main);border-color:var(--main);}

/* ---------- filter tabs ---------- */
.filter-bar{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:32px;}
.filter-bar button{
  background:none;border:1px solid var(--line);color:var(--muted);
  font-size:13.5px;padding:7px 17px;border-radius:999px;cursor:pointer;
  transition:.24s;letter-spacing:.04em;font-family:inherit;
}
.filter-bar button:hover{color:var(--text);border-color:var(--main);}
.filter-bar button.on{background:var(--main);border-color:var(--main);color:#fff;}

/* ---------- cards grid (feature) ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
@media(max-width:900px){.feature-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:600px){.feature-grid{grid-template-columns:1fr;}}
.f-card{
  border:1px solid var(--line);padding:26px 24px;border-radius:3px;
  transition:.28s;background:var(--card);position:relative;overflow:hidden;
}
.f-card::after{
  content:"";position:absolute;top:0;left:-60%;width:45%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(34,211,238,.14),transparent);
  transform:skewX(-18deg);transition:.7s;
}
.f-card:hover{border-color:rgba(109,93,252,.6);transform:translateY(-3px);}
.f-card:hover::after{left:120%;}
.f-card .ico{font-size:19px;color:var(--accent);margin-bottom:15px;}
.f-card h3{font-size:17.5px;margin:0 0 11px;}
.f-card p{font-size:13.5px;color:var(--muted);margin:0;line-height:1.85;}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);}
@media(max-width:860px){.steps{grid-template-columns:repeat(2,1fr);}}
@media(max-width:480px){.steps{grid-template-columns:1fr;}}
.step{padding:28px 24px;border-right:1px solid var(--line);}
.step:last-child{border-right:none;}
@media(max-width:860px){.step:nth-child(2){border-right:none;}.step:nth-child(1),.step:nth-child(2){border-bottom:1px solid var(--line);}}
@media(max-width:480px){.step{border-right:none;border-bottom:1px solid var(--line);}}
.step .no{
  font-family:"Inter",sans-serif;font-size:13px;font-weight:700;
  color:var(--accent);letter-spacing:.22em;margin-bottom:13px;
}
.step h4{font-size:16px;margin:0 0 9px;}
.step p{font-size:13px;color:var(--muted);margin:0;line-height:1.8;}

/* ---------- topic / random ---------- */
.two-col{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;}
@media(max-width:860px){.two-col{grid-template-columns:1fr;}}
.panel{border:1px solid var(--line);padding:32px 28px;border-radius:3px;background:var(--card);}
.panel h3{font-size:21px;margin:0 0 14px;}
.panel p{font-size:14px;color:var(--muted);line-height:1.95;margin:0 0 16px;}
.panel ul{list-style:none;padding:0;margin:0;}
.panel li{
  font-size:13.5px;color:var(--muted);padding:11px 0;border-bottom:1px dashed rgba(232,234,246,.12);
  display:flex;gap:11px;line-height:1.7;
}
.panel li:last-child{border-bottom:none;}
.panel li i{color:var(--accent);font-size:11px;margin-top:7px;flex:none;}

.pick-box{
  border:1px solid var(--line);padding:32px 28px;border-radius:3px;
  display:flex;flex-direction:column;justify-content:center;
  background:linear-gradient(165deg,rgba(109,93,252,.12),rgba(34,211,238,.04));
}
.pick-box .res{
  font-family:"Source Han Serif SC",serif;font-size:23px;font-weight:700;
  min-height:38px;margin-bottom:8px;line-height:1.45;
}
.pick-box .res-meta{font-size:13px;color:var(--accent);min-height:22px;margin-bottom:24px;letter-spacing:.04em;}
.btn-shine{
  position:relative;overflow:hidden;border:none;border-radius:2px;
  padding:13px 26px;font-size:14.5px;font-weight:600;color:#fff;cursor:pointer;
  background:linear-gradient(100deg,var(--main),var(--accent),var(--main));
  background-size:220% 100%;transition:background-position .7s;
  font-family:inherit;letter-spacing:.06em;
}
.btn-shine:hover{background-position:100% 0;}
.btn-shine::before{
  content:"";position:absolute;top:0;left:-80%;width:50%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.42),transparent);
  transform:skewX(-20deg);transition:left .68s;
}
.btn-shine:hover::before{left:130%;}

/* ---------- friends ---------- */
.friends{max-width:1280px;margin:0 auto;padding:0 22px 64px;}
.friends-box{
  border-top:1px solid var(--line);padding-top:26px;
}
.friends-box h3{
  font-size:15px;letter-spacing:.2em;color:var(--muted);margin:0 0 16px;
  font-weight:600;font-family:"Inter",sans-serif;
}
.friends-box .fl{font-size:13px;color:var(--muted);line-height:2.2;word-break:break-all;}

/* ---------- footer ---------- */
footer{border-top:1px solid var(--line);background:rgba(232,234,246,.015);}
.foot-in{
  max-width:1280px;margin:0 auto;padding:52px 22px 32px;
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;
}
@media(max-width:860px){.foot-in{grid-template-columns:1fr 1fr;gap:28px;}}
@media(max-width:520px){.foot-in{grid-template-columns:1fr;}}
.foot-brand{
  font-family:"Source Han Serif SC",serif;font-size:20px;font-weight:800;
  margin-bottom:13px;
}
.foot-in p{font-size:13px;color:var(--muted);line-height:1.95;margin:0;}
.foot-col h4{font-size:13px;letter-spacing:.16em;color:var(--text);margin:0 0 15px;font-family:"Inter",sans-serif;}
.foot-col a{display:block;font-size:13px;color:var(--muted);padding:5px 0;transition:.2s;}
.foot-col a:hover{color:var(--accent);padding-left:4px;}
.copy{
  max-width:1280px;margin:0 auto;padding:20px 22px 34px;
  border-top:1px solid var(--line);font-size:12.5px;color:var(--muted);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;letter-spacing:.03em;
}

/* modal fallback (click outside flip) */
.overlay{position:fixed;inset:0;background:rgba(15,16,32,.5);z-index:900;display:none;}
.overlay.show{display:block;}

@media(max-width:520px){
  .sec{padding:52px 16px;}
  .hero{padding:52px 16px 46px;}
  .hero-stats{gap:30px;}
  .rank-row{grid-template-columns:40px 1fr;gap:12px;row-gap:6px;}
  .rank-row .rank-heat,.rank-row .stars{grid-column:2;}
}

/* --- 子页面追加 --- */
.page-hero {padding:120px 0 40px;position:relative;overflow:hidden;}
.page-hero::before {content:"";position:absolute;top:-180px;left:50%;transform:translateX(-50%);width:760px;height:760px;background:radial-gradient(circle,rgba(109,93,252,.28),rgba(34,211,238,.10) 45%,transparent 70%);pointer-events:none;}
.page-hero .wrap {position:relative;z-index:2;}
.kicker {display:inline-flex;align-items:center;gap:8px;font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);border:1px solid var(--line);border-radius:999px;padding:6px 16px;background:var(--card);}
.page-hero h1 {font-weight:900;font-size:clamp(1.7rem,4vw,2.8rem);line-height:1.25;margin:18px 0 14px;letter-spacing:-.02em;}
.page-hero h1 em {font-style:normal;background:linear-gradient(90deg,var(--main),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent;}
.page-hero p.lead {color:var(--muted);max-width:760px;font-size:1rem;line-height:1.85;margin:0;}
.hero-stats .st {display:flex;flex-direction:column;gap:4px;}
.hero-stats .st b {font-size:1.5rem;font-weight:800;color:var(--text);}
.hero-stats .st span {font-size:.8rem;color:var(--muted);}
.sec-head h2 i {color:var(--accent);margin-right:8px;}
.sec-head .sub {color:var(--muted);font-size:.86rem;margin:6px 0 0;}
.rank-row:nth-child(1) .rank-no {color:#ffd166;}
.rank-row:nth-child(2) .rank-no {color:#dcdfe8;}
.rank-meta span {display:inline-flex;align-items:center;gap:5px;}
.rank-heat b {font-size:.95rem;color:var(--accent);font-variant-numeric:tabular-nums;}
.badge-tag {display:inline-block;font-size:.68rem;padding:2px 9px;border-radius:999px;border:1px solid var(--line);color:var(--accent);background:rgba(34,211,238,.08);}
.rule-grid {display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;}
.rule-card {border:1px solid var(--line);border-radius:14px;padding:20px;background:var(--card);}
.rule-card h3 {font-size:.98rem;font-weight:700;margin:0 0 10px;display:flex;align-items:center;gap:8px;}
.rule-card h3 i {color:var(--main);}
.rule-card p {font-size:.86rem;color:var(--muted);line-height:1.75;margin:0;}
.flip:hover .flip-inner {transform:rotateY(180deg);}
.face img {width:100%;height:100%;object-fit:cover;display:block;}
.face-back p {font-size:.76rem;color:var(--muted);line-height:1.6;margin:0;}
.cta-box {border:1px solid var(--line);border-radius:18px;padding:30px;background:linear-gradient(135deg,rgba(109,93,252,.14),rgba(34,211,238,.06));text-align:center;}
.cta-box h2 {font-size:1.2rem;font-weight:800;margin:0 0 10px;}
.cta-box p {color:var(--muted);font-size:.88rem;margin:0 0 18px;}
.btn-main {display:inline-flex;align-items:center;gap:8px;padding:11px 26px;border-radius:999px;background:linear-gradient(90deg,var(--main),var(--accent));color:#0b0c18;font-weight:700;font-size:.88rem;text-decoration:none;transition:.25s;}
.btn-main:hover {opacity:.88;color:#0b0c18;transform:translateY(-2px);}
.btn-ghost {display:inline-flex;align-items:center;gap:8px;padding:10px 24px;border-radius:999px;border:1px solid var(--line);color:var(--text);font-size:.86rem;text-decoration:none;transition:.25s;margin-left:10px;}
.btn-ghost:hover {border-color:var(--main);color:var(--accent);}
.foot {border-top:1px solid var(--line);padding:36px 0;margin-top:40px;font-size:.82rem;color:var(--muted);}
.foot a {color:var(--muted);text-decoration:none;margin-right:16px;}
.foot a:hover {color:var(--accent);}
.page-hero {padding:96px 0 20px;}
.btn-ghost {margin-left:0;margin-top:10px;}

/* --- 子页面追加 --- */
/* 本页专属少量样式：沿用站点 CSS 变量，不改动全局 */
  .about-hero {position:relative;overflow:hidden;padding:64px 0 40px;border-bottom:1px solid var(--line);}
.about-hero .hero-bg {position:absolute;inset:0;background:
    radial-gradient(60% 90% at 15% 0%, rgba(109,93,252,.28), transparent 60%),
    radial-gradient(50% 80% at 85% 10%, rgba(34,211,238,.18), transparent 60%);pointer-events:none;}
.about-hero .hero-inner {position:relative;z-index:1;}
.about-hero h1 {font-weight:800;font-size:clamp(1.7rem,4vw,2.7rem);line-height:1.25;margin:0 0 14px;letter-spacing:-.01em;}
.about-hero h1 em {font-style:normal;background:linear-gradient(90deg,var(--main),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent;}
.about-lead {color:var(--muted);font-size:1.02rem;line-height:1.9;max-width:760px;margin:0;}
.about-grid {display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.about-card {background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px 20px;height:100%;transition:border-color .2s,transform .2s;}
.about-card:hover {border-color:rgba(109,93,252,.5);transform:translateY(-3px);}
.about-card .ico {width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,rgba(109,93,252,.28),rgba(34,211,238,.18));color:var(--accent);font-size:1.05rem;margin-bottom:14px;}
.about-card h3 {font-size:1.02rem;font-weight:700;margin:0 0 8px;color:var(--text);}
.about-card p {font-size:.9rem;line-height:1.85;color:var(--muted);margin:0;}
.about-list {list-style:none;padding:0;margin:0;display:grid;gap:12px;}
.about-list li {display:flex;gap:12px;align-items:flex-start;background:var(--card);border:1px solid var(--line);
    border-radius:12px;padding:14px 16px;font-size:.93rem;line-height:1.8;color:var(--muted);}
.about-list li i {color:var(--accent);margin-top:4px;flex:0 0 auto;}
.about-list strong {color:var(--text);font-weight:600;}
.about-num {display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:8px;}
.about-num div {background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px 16px;text-align:center;}
.about-num b {display:block;font-size:1.45rem;font-weight:800;
    background:linear-gradient(90deg,var(--main),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent;}
.about-num span {font-size:.8rem;color:var(--muted);}
.about-cta {background:linear-gradient(135deg,rgba(109,93,252,.16),rgba(34,211,238,.08));
    border:1px solid var(--line);border-radius:18px;padding:30px 26px;display:flex;gap:20px;align-items:center;justify-content:space-between;flex-wrap:wrap;}
.about-cta p {margin:0;color:var(--muted);font-size:.95rem;line-height:1.8;max-width:640px;}
.about-cta p strong {color:var(--text);}
.about-btn {display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:999px;
    background:linear-gradient(90deg,var(--main),var(--accent));color:#fff;font-weight:600;font-size:.92rem;
    text-decoration:none;white-space:nowrap;transition:opacity .2s;}
.about-btn:hover {opacity:.86;color:#fff;}
.about-grid {grid-template-columns:1fr 1fr;}
.about-num {grid-template-columns:1fr 1fr;}
.about-grid {grid-template-columns:1fr;}
.about-hero {padding:44px 0 30px;}

/* --- 子页面追加 --- */
/* 本页专属少量样式，复用站点配色变量 */
    .doc-sec { max-width: 900px; margin: 0 auto; }
.doc-sec h2 {
      font-size: clamp(1.25rem, 2.4vw, 1.6rem);
      font-weight: 800;
      margin: 2.6rem 0 1rem;
      letter-spacing: .2px;
      display: flex;
      align-items: center;
      gap: .6rem;
      color: var(--text);
    }
.doc-sec h2 .idx {
      font-size: .8rem;
      font-weight: 700;
      color: var(--bg);
      background: linear-gradient(135deg, var(--main), var(--accent));
      border-radius: 6px;
      padding: .18rem .5rem;
      flex: none;
      letter-spacing: 0;
    }
.doc-sec h3 {
      font-size: 1.05rem;
      font-weight: 700;
      margin: 1.6rem 0 .6rem;
      color: var(--text);
    }
.doc-sec p, .doc-sec li {
      color: var(--muted);
      line-height: 1.9;
      font-size: .95rem;
    }
.doc-sec ul { padding-left: 1.15rem; margin: .5rem 0 1rem; }
.doc-sec li { margin-bottom: .45rem; }
.doc-sec strong { color: var(--text); font-weight: 600; }
.doc-card {
      background: var(--card);
      border: 1px solid var(--line);
      border-left: 3px solid var(--main);
      border-radius: 12px;
      padding: 1.05rem 1.2rem;
      margin: 1.1rem 0;
    }
.doc-card p { margin: 0; }
.doc-card.accent { border-left-color: var(--accent); }
.doc-meta {
      display: flex; flex-wrap: wrap; gap: .5rem .9rem;
      font-size: .8rem; color: var(--muted);
      margin-bottom: 1.6rem;
    }
.doc-meta span {
      border: 1px solid var(--line);
      border-radius: 999px;
      padding: .2rem .7rem;
      background: var(--card);
    }
.doc-toc {
      background: var(--card);
      border: 1px solid var(--line);
      border-radius: 14px;
      padding: 1.2rem 1.35rem;
      margin-bottom: 2rem;
    }
.doc-toc-title {
      font-weight: 800; font-size: .95rem; margin-bottom: .75rem; color: var(--text);
      display: flex; align-items: center; gap: .5rem;
    }
.doc-toc a {
      color: var(--muted); text-decoration: none; font-size: .9rem;
      display: block; padding: .22rem 0; transition: color .2s;
    }
.doc-toc a:hover { color: var(--accent); }
.doc-toc a i { font-size: .6rem; margin-right: .5rem; color: var(--main); }
.doc-note {
      font-size: .85rem; color: var(--muted);
      border-top: 1px dashed var(--line);
      padding-top: 1rem; margin-top: 2.4rem;
    }

/* --- 子页面追加 --- */
.guide-wrap {max-width:1080px;margin:0 auto;padding:0 20px}
.guide-lead {color:var(--muted);font-size:1.02rem;line-height:1.85;max-width:780px}
.guide-card {background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px 24px;height:100%}
.guide-card h3 {font-size:1.08rem;font-weight:700;margin:0 0 10px;display:flex;align-items:center;gap:9px}
.guide-card h3 i {color:var(--accent);font-size:.95rem}
.guide-card p {color:var(--muted);font-size:.93rem;line-height:1.8;margin:0}
.step-list {list-style:none;padding:0;margin:0;counter-reset:gstep}
.step-list li {position:relative;padding:0 0 22px 52px;counter-increment:gstep}
.step-list li:last-child {padding-bottom:0}
.step-list li::before {content:counter(gstep);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:50%;
    display:flex;align-items:center;justify-content:center;font-weight:800;font-size:.92rem;
    background:linear-gradient(135deg,var(--main),var(--accent));color:#0f1020}
.step-list li::after {content:"";position:absolute;left:16px;top:40px;bottom:8px;width:1px;background:var(--line)}
.step-list li:last-child::after {display:none}
.step-list h4 {font-size:1rem;font-weight:700;margin:4px 0 6px}
.step-list p {color:var(--muted);font-size:.92rem;line-height:1.8;margin:0}
.badge-tip {display:inline-flex;align-items:center;gap:6px;font-size:.78rem;padding:4px 11px;border-radius:999px;
    border:1px solid var(--line);color:var(--accent);background:rgba(34,211,238,.08);margin-bottom:14px}
.faq-item {border:1px solid var(--line);border-radius:14px;padding:20px 22px;background:var(--card);margin-bottom:14px}
.faq-item h4 {font-size:.98rem;font-weight:700;margin:0 0 8px;display:flex;gap:9px;align-items:flex-start}
.faq-item h4 i {color:var(--main);margin-top:3px}
.faq-item p {color:var(--muted);font-size:.92rem;line-height:1.8;margin:0}
.glossary {display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.glossary div {background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.glossary strong {display:block;font-size:.95rem;margin-bottom:6px;color:var(--text)}
.glossary span {color:var(--muted);font-size:.88rem;line-height:1.75}
.cta-band {margin-top:46px;border:1px solid var(--line);border-radius:18px;padding:30px 26px;
    background:linear-gradient(135deg,rgba(109,93,252,.16),rgba(34,211,238,.08));text-align:center}
.cta-band h2 {font-size:1.3rem;font-weight:800;margin:0 0 10px}
.cta-band p {color:var(--muted);font-size:.93rem;margin:0 0 18px}
.cta-band a {display:inline-block;padding:11px 26px;border-radius:999px;font-weight:700;font-size:.92rem;
    color:#0f1020;background:linear-gradient(135deg,var(--main),var(--accent));text-decoration:none;margin:5px 6px}
.cta-band a.ghost {background:transparent;color:var(--text);border:1px solid var(--line)}
.step-list li {padding-left:46px}
.guide-card {padding:20px 18px}