:root{
  --c-main:#818cf8;
  --c-accent:#c084fc;
  --c-bg:#1e1b4b;
  --c-text:#e0e7ff;
  --c-line:rgba(224,231,255,.16);
  --c-line-strong:rgba(224,231,255,.32);
  --c-soft:rgba(129,140,248,.10);
  --font-title:"Songti SC","SimSun","Noto Serif SC",Georgia,serif;
  --font-body:"Inter","PingFang SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  --sidebar-w:270px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--c-bg);
  color:var(--c-text);
  font-family:var(--font-body);
  line-height:1.75;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,h5{font-family:var(--font-title);letter-spacing:.02em;}
a{text-decoration:none;color:inherit;}
::selection{background:var(--c-accent);color:#1e1b4b;}

/* ---------- 进度条 ---------- */
#scrollProgress{
  position:fixed;top:0;left:0;height:3px;width:0;
  background:linear-gradient(90deg,var(--c-main),var(--c-accent));
  z-index:2000;transition:width .08s linear;
}

/* ---------- 几何点缀 ---------- */
.geo-layer{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden;}
.geo{position:absolute;opacity:.07;}
.geo-circle{border-radius:50%;border:1px solid var(--c-main);}
.geo-square{border:1px solid var(--c-accent);}
.geo-tri{width:0;height:0;border-style:solid;}
.geo-1{width:260px;height:260px;top:6%;right:8%;}
.geo-2{width:180px;height:180px;top:38%;left:32%;transform:rotate(18deg);}
.geo-3{width:0;height:0;top:62%;right:16%;border-width:0 70px 120px 70px;border-color:transparent transparent var(--c-main) transparent;opacity:.06;}
.geo-4{width:120px;height:120px;bottom:12%;left:40%;border-radius:50%;border:1px solid var(--c-accent);}
.geo-5{width:90px;height:90px;top:14%;left:38%;transform:rotate(32deg);}

/* ---------- 侧栏 ---------- */
.sidebar{
  position:fixed;top:0;left:0;width:var(--sidebar-w);height:100vh;
  border-right:1px solid var(--c-line);
  padding:36px 26px;
  display:flex;flex-direction:column;
  background:rgba(30,27,75,.72);
  backdrop-filter:blur(10px);
  z-index:1001;
  overflow-y:auto;
}
.brand-mark{
  font-family:var(--font-title);
  font-size:1.18rem;
  font-weight:700;
  color:var(--c-text);
  display:flex;align-items:center;gap:10px;
  line-height:1.4;
  letter-spacing:.02em;
}
.brand-mark i{color:var(--c-accent);font-size:1rem;}
.brand-sub{
  font-size:.68rem;letter-spacing:.28em;color:rgba(224,231,255,.42);
  margin-top:8px;text-transform:uppercase;
}
.side-nav{margin-top:44px;display:flex;flex-direction:column;gap:2px;}
.side-nav a{
  padding:11px 14px;
  border-left:2px solid transparent;
  font-size:.94rem;
  color:rgba(224,231,255,.68);
  transition:.25s;
  display:flex;align-items:center;gap:10px;
}
.side-nav a i{width:16px;font-size:.78rem;opacity:.7;}
.side-nav a:hover,.side-nav a.active{
  color:var(--c-text);
  border-left-color:var(--c-main);
  background:var(--c-soft);
}
.side-meta{
  margin-top:auto;padding-top:28px;
  border-top:1px solid var(--c-line);
  font-size:.74rem;color:rgba(224,231,255,.42);
  line-height:1.9;
}
.side-meta strong{color:var(--c-main);font-weight:600;}

/* 移动端顶栏 */
.mobile-bar{
  display:none;position:fixed;top:0;left:0;right:0;height:60px;
  background:rgba(30,27,75,.94);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c-line);
  align-items:center;justify-content:space-between;
  padding:0 18px;z-index:1100;
}
.mobile-bar .brand-mark{font-size:.98rem;}
.menu-btn{
  background:none;border:1px solid var(--c-line-strong);color:var(--c-text);
  width:40px;height:40px;border-radius:2px;font-size:1rem;
}
.mobile-drawer{
  position:fixed;top:60px;left:0;right:0;
  background:rgba(30,27,75,.98);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--c-line);
  z-index:1090;display:none;flex-direction:column;
  padding:12px 18px 24px;
}
.mobile-drawer.show{display:flex;}
.mobile-drawer a{
  padding:13px 4px;border-bottom:1px solid var(--c-line);
  font-size:.95rem;color:rgba(224,231,255,.8);
}
.mobile-drawer a:last-child{border-bottom:none;}

/* ---------- 主区 ---------- */
.main{margin-left:var(--sidebar-w);position:relative;z-index:1;padding:0 clamp(20px,4vw,64px);}
section{padding:clamp(56px,8vw,110px) 0;border-bottom:1px solid var(--c-line);}
section:last-of-type{border-bottom:none;}
.eyebrow{
  font-size:.72rem;letter-spacing:.3em;text-transform:uppercase;
  color:var(--c-main);margin-bottom:18px;font-weight:600;
}
.h-display{font-size:clamp(2rem,4.4vw,3.4rem);line-height:1.22;font-weight:700;margin:0 0 22px;}
.h-display em{font-style:normal;color:var(--c-accent);}
.lead-txt{font-size:clamp(.98rem,1.15vw,1.08rem);color:rgba(224,231,255,.7);max-width:44em;}

/* ---------- Hero ---------- */
.hero{padding-top:clamp(64px,9vw,130px);}
.stat-row{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:0;margin-top:56px;border-top:1px solid var(--c-line);
}
.stat-cell{
  padding:32px 26px 30px 0;
  border-right:1px solid var(--c-line);
}
.stat-cell:last-child{border-right:none;}
.stat-num{
  font-family:var(--font-title);
  font-size:clamp(2.4rem,5.6vw,4.2rem);
  font-weight:700;line-height:1;
  color:var(--c-text);
  letter-spacing:-.02em;
}
.stat-num span{font-size:.42em;color:var(--c-main);margin-left:4px;font-family:var(--font-body);font-weight:500;}
.stat-label{margin-top:12px;font-size:.82rem;color:rgba(224,231,255,.5);letter-spacing:.06em;}

/* ---------- 特色 / 标签页 ---------- */
.tabs-bar{
  display:flex;flex-wrap:wrap;gap:0;
  border-bottom:1px solid var(--c-line);margin-bottom:44px;
}
.tab-btn{
  background:none;border:none;border-bottom:2px solid transparent;
  color:rgba(224,231,255,.55);font-size:.92rem;font-weight:500;
  padding:14px 22px;cursor:pointer;transition:.25s;font-family:var(--font-body);
  margin-bottom:-1px;
}
.tab-btn:hover{color:var(--c-text);}
.tab-btn.active{color:var(--c-text);border-bottom-color:var(--c-accent);}
.tab-pane{display:none;}
.tab-pane.active{display:block;animation:fadeUp .38s ease;}
@keyframes fadeUp{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:none;}}
.feature-grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));
  gap:0;border-top:1px solid var(--c-line);border-left:1px solid var(--c-line);
}
.f-card{
  padding:34px 28px 36px;
  border-right:1px solid var(--c-line);
  border-bottom:1px solid var(--c-line);
  transition:transform .3s ease,border-color .3s ease,background .3s ease;
  background:transparent;
}
.f-card:hover{
  transform:scale(1.022);
  border-color:var(--c-line-strong);
  background:rgba(129,140,248,.045);
}
.f-icon{
  font-size:1.3rem;color:var(--c-accent);margin-bottom:20px;
  display:block;
}
.f-card h4{font-size:1.08rem;margin:0 0 12px;font-weight:600;}
.f-card p{margin:0;font-size:.88rem;color:rgba(224,231,255,.62);line-height:1.8;}

/* ---------- 时间线 ---------- */
.timeline{position:relative;margin-top:20px;padding-left:34px;}
.timeline::before{
  content:"";position:absolute;left:6px;top:8px;bottom:8px;
  width:1px;background:var(--c-line-strong);
}
.tl-item{position:relative;padding-bottom:44px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-33px;top:9px;
  width:13px;height:13px;border:1px solid var(--c-main);
  background:var(--c-bg);transform:rotate(45deg);
}
.tl-year{
  font-family:var(--font-title);font-size:1.5rem;font-weight:700;
  color:var(--c-main);line-height:1;margin-bottom:10px;
}
.tl-item h4{margin:0 0 8px;font-size:1.02rem;font-weight:600;}
.tl-item p{margin:0;font-size:.9rem;color:rgba(224,231,255,.62);max-width:40em;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--c-line);}
.faq-item{border-bottom:1px solid var(--c-line);}
.faq-q{
  width:100%;background:none;border:none;text-align:left;
  padding:24px 40px 24px 0;position:relative;
  color:var(--c-text);font-size:1rem;font-weight:600;cursor:pointer;
  font-family:var(--font-body);transition:color .2s;
}
.faq-q:hover{color:var(--c-accent);}
.faq-q::after{
  content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);
  font-size:1.4rem;font-weight:300;color:var(--c-main);transition:transform .3s;
}
.faq-item.open .faq-q::after{content:"−";}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .35s ease;
}
.faq-a p{
  margin:0 0 26px;padding-right:40px;
  font-size:.92rem;color:rgba(224,231,255,.66);line-height:1.85;
}

/* ---------- 介绍 / 图文 ---------- */
.intro-wrap{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,5vw,72px);align-items:start;}
.intro-media{position:relative;border:1px solid var(--c-line);}
.intro-media img{width:100%;display:block;aspect-ratio:4/3;object-fit:cover;}
.img-ph{
  width:100%;aspect-ratio:4/3;
  background:
    radial-gradient(circle at 32% 28%,rgba(192,132,252,.35),transparent 58%),
    radial-gradient(circle at 74% 70%,rgba(129,140,248,.4),transparent 60%),
    #241f57;
  filter:blur(14px);transition:filter .6s ease,opacity .6s ease;opacity:.9;
}
.img-ph.loaded{filter:none;opacity:1;}
.intro-media img{opacity:0;transition:opacity .7s ease;}
.intro-media img.loaded{opacity:1;}
.thesis{font-family:var(--font-title);font-size:1.24rem;line-height:1.7;margin:0 0 26px;color:var(--c-text);border-left:2px solid var(--c-accent);padding-left:20px;}
.intro-body p{font-size:.93rem;color:rgba(224,231,255,.66);margin-bottom:16px;}

/* ---------- CTA ---------- */
.cta-box{
  border:1px solid var(--c-line-strong);
  padding:clamp(38px,6vw,76px) clamp(26px,5vw,60px);
  position:relative;overflow:hidden;
}
.cta-box::before{
  content:"";position:absolute;width:280px;height:280px;border-radius:50%;
  border:1px solid var(--c-main);opacity:.18;right:-90px;top:-90px;
}
.cta-box::after{
  content:"";position:absolute;width:150px;height:150px;
  border:1px solid var(--c-accent);opacity:.16;left:-40px;bottom:-60px;transform:rotate(20deg);
}
.cta-box h2{font-size:clamp(1.6rem,3.2vw,2.4rem);margin:0 0 18px;position:relative;z-index:1;}
.cta-box p{max-width:40em;color:rgba(224,231,255,.68);margin-bottom:34px;position:relative;z-index:1;}
.btn-main{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 34px;border:1px solid var(--c-main);
  color:var(--c-text);font-size:.93rem;font-weight:600;
  background:linear-gradient(90deg,rgba(129,140,248,.18),rgba(192,132,252,.18));
  transition:.3s;position:relative;z-index:1;
}
.btn-main:hover{border-color:var(--c-accent);background:linear-gradient(90deg,rgba(129,140,248,.34),rgba(192,132,252,.34));color:#fff;}
.btn-ghost{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 30px;border:1px solid var(--c-line-strong);
  color:rgba(224,231,255,.8);font-size:.93rem;margin-left:12px;transition:.3s;
  position:relative;z-index:1;
}
.btn-ghost:hover{border-color:var(--c-main);color:var(--c-text);}

/* ---------- 卡片瀑布流(选片展示) ---------- */
.masonry{columns:3;column-gap:0;border-top:1px solid var(--c-line);}
.m-card{
  break-inside:avoid;border-bottom:1px solid var(--c-line);
  border-right:1px solid var(--c-line);padding:0;margin:0;
  transition:transform .3s ease,border-color .3s ease;
}
.m-card:hover{transform:scale(1.025);border-color:var(--c-line-strong);}
.m-card figure{margin:0;}
.m-card .m-thumb{
  width:100%;display:block;aspect-ratio:3/4;object-fit:cover;
  background:#241f57;opacity:0;transition:opacity .7s ease;
}
.m-card .m-thumb.loaded{opacity:1;}
.m-card figcaption{padding:18px 20px 22px;}
.m-card h5{margin:0 0 6px;font-size:.98rem;font-weight:600;}
.m-card span{font-size:.78rem;color:rgba(224,231,255,.45);letter-spacing:.05em;}

/* ---------- 友链 & 页脚 ---------- */
.friend-links{padding:44px 0;border-top:1px solid var(--c-line);}
.fl-title{
  font-size:.74rem;letter-spacing:.3em;text-transform:uppercase;
  color:rgba(224,231,255,.45);margin-bottom:16px;font-weight:600;
}
.fl-body{font-size:.84rem;color:rgba(224,231,255,.6);line-height:2;}
footer{
  padding:44px 0 60px;border-top:1px solid var(--c-line);
  display:flex;flex-wrap:wrap;gap:22px;justify-content:space-between;
  font-size:.8rem;color:rgba(224,231,255,.42);
}
footer a{color:rgba(224,231,255,.6);margin-right:18px;transition:.2s;}
footer a:hover{color:var(--c-accent);}

/* ---------- 响应式 ---------- */
@media(max-width:1199px){
  .masonry{columns:2;}
}
@media(max-width:991px){
  .sidebar{display:none;}
  .mobile-bar{display:flex;}
  .main{margin-left:0;padding-top:60px;}
  .intro-wrap{grid-template-columns:1fr;}
  .stat-cell{border-right:none;border-bottom:1px solid var(--c-line);padding-right:0;}
  .stat-cell:last-child{border-bottom:none;}
}
@media(max-width:575px){
  .masonry{columns:1;}
  .btn-ghost{margin-left:0;margin-top:12px;}
  .tab-btn{padding:12px 14px;font-size:.85rem;}
  .feature-grid{grid-template-columns:1fr;}
  .timeline{padding-left:26px;}
  .tl-item::before{left:-25px;}
}

/* --- 子页面追加 --- */
/* 本页专属少量样式，其余复用站点样式表 */
  .guide-grid { display: grid; gap: 1.15rem; }
.guide-card {
    background: var(--c-soft);
    border: 1px solid var(--c-line);
    border-radius: 16px;
    padding: 1.5rem 1.4rem;
    transition: border-color .25s ease, transform .25s ease;
  }
.guide-card:hover { border-color: var(--c-line-strong); transform: translateY(-2px); }
.guide-card .gc-icon {
    width: 40px; height: 40px; border-radius: 12px;
    display: inline-flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--c-main), var(--c-accent));
    color: #1e1b4b; font-size: 1rem; margin-bottom: .85rem;
  }
.guide-card h3 {
    font-family: var(--font-title);
    font-size: 1.12rem;
    color: var(--c-text);
    margin: 0 0 .55rem;
    letter-spacing: .01em;
  }
.guide-card p { color: var(--c-text); opacity: .82; font-size: .93rem; line-height: 1.75; margin: 0; }
.step-list { list-style: none; margin: 0; padding: 0; counter-reset: step; }
.step-list li {
    position: relative;
    padding: .95rem 0 .95rem 3.1rem;
    border-bottom: 1px dashed var(--c-line);
    color: var(--c-text); font-size: .94rem; line-height: 1.75;
  }
.step-list li:last-child { border-bottom: none; }
.step-list li::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    position: absolute; left: 0; top: .95rem;
    width: 2.2rem; height: 2.2rem; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-title);
    font-size: .82rem; color: var(--c-main);
    border: 1px solid var(--c-line-strong);
    background: var(--c-soft);
  }
.step-list li strong { color: var(--c-text); font-weight: 600; }
.faq-item + .faq-item { margin-top: .8rem; }
.faq-item summary {
    cursor: pointer; list-style: none;
    padding: 1rem 1.15rem;
    font-size: .96rem; font-weight: 600; color: var(--c-text);
    display: flex; align-items: center; gap: .7rem;
  }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--c-main); font-size: .82rem; transition: transform .25s ease; }
.faq-item[open] summary i { transform: rotate(90deg); }
.faq-item .faq-body { padding: 0 1.15rem 1.1rem 2.6rem; color: var(--c-text); opacity: .82; font-size: .9rem; line-height: 1.8; }
.tip-box {
    border-left: 3px solid var(--c-accent);
    background: var(--c-soft);
    border-radius: 0 14px 14px 0;
    padding: 1.15rem 1.3rem;
    color: var(--c-text); font-size: .93rem; line-height: 1.8;
  }
.tip-box strong { color: var(--c-accent); }
.quality-table { width: 100%; border-collapse: collapse; font-size: .9rem; }
.quality-table th, .quality-table td {
    text-align: left; padding: .8rem .95rem;
    border-bottom: 1px solid var(--c-line);
    color: var(--c-text);
  }
.quality-table th { color: var(--c-main); font-weight: 600; font-size: .84rem; letter-spacing: .04em; text-transform: uppercase; }
.quality-table td { opacity: .86; }
.quality-table tr:last-child td { border-bottom: none; }
.pill-row { display: flex; flex-wrap: wrap; gap: .55rem; margin-top: 1rem; }
.pill {
    font-size: .78rem; padding: .38rem .8rem; border-radius: 999px;
    border: 1px solid var(--c-line-strong);
    color: var(--c-text); background: var(--c-soft);
  }
.pill i { color: var(--c-accent); margin-right: .35rem; }

/* --- 子页面追加 --- */
.doc-hero {padding:6px 0 30px;border-bottom:1px solid var(--c-line);margin-bottom:34px}
.doc-hero .eyebrow {margin-bottom:14px}
.doc-hero h1 {font-family:var(--font-title);font-weight:800;line-height:1.25;font-size:clamp(1.7rem,4vw,2.6rem);color:var(--c-text);margin:0 0 16px}
.doc-hero h1 em {font-style:normal;color:var(--c-main)}
.doc-stamp {display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.doc-stamp span {font-size:.78rem;letter-spacing:.04em;padding:6px 12px;border-radius:999px;border:1px solid var(--c-line-strong);color:var(--c-text);opacity:.8;background:var(--c-soft)}
.doc-block {padding:30px 0;border-bottom:1px dashed var(--c-line)}
.doc-block:last-of-type {border-bottom:none}
.doc-block h2 {font-family:var(--font-title);font-size:clamp(1.18rem,2.4vw,1.5rem);font-weight:700;color:var(--c-text);margin:0 0 6px;line-height:1.45}
.doc-block h2 .idx {color:var(--c-accent);font-family:var(--font-body);font-weight:800;font-size:.86rem;margin-right:10px;letter-spacing:.08em;vertical-align:2px}
.doc-block h3 {font-family:var(--font-body);font-size:1rem;font-weight:600;color:var(--c-main);margin:22px 0 8px}
.doc-block p {color:var(--c-text);opacity:.82;line-height:1.9;margin:10px 0;font-size:.95rem}
.doc-block ul {margin:12px 0 4px;padding-left:0;list-style:none}
.doc-block ul li {position:relative;padding-left:22px;color:var(--c-text);opacity:.82;line-height:1.9;font-size:.95rem;margin-bottom:8px}
.doc-block ul li::before {content:"";position:absolute;left:4px;top:.72em;width:7px;height:7px;border-radius:2px;background:var(--c-accent);opacity:.85;transform:rotate(45deg)}
.doc-block strong {color:var(--c-text);opacity:1;font-weight:600}
.note-card {border:1px solid var(--c-line-strong);background:var(--c-soft);border-radius:14px;padding:18px 20px;margin:18px 0;display:flex;gap:14px;align-items:flex-start}
.note-card i {color:var(--c-accent);font-size:1.05rem;margin-top:3px;flex:0 0 auto}
.note-card p {margin:0;font-size:.92rem;opacity:.88;line-height:1.85}
.toc {border:1px solid var(--c-line);border-radius:16px;padding:20px 22px;background:rgba(129,140,248,.06);margin-bottom:38px}
.toc-title {font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;color:var(--c-main);font-weight:700;margin-bottom:14px}
.toc ol {margin:0;padding:0;list-style:none;counter-reset:toc}
.toc li {counter-increment:toc;margin-bottom:9px}
.toc a {color:var(--c-text);opacity:.8;text-decoration:none;font-size:.92rem;display:inline-flex;gap:10px;line-height:1.6;transition:.18s}
.toc a::before {content:counter(toc,decimal-leading-zero);color:var(--c-accent);font-weight:700;font-size:.8rem;opacity:.9;font-family:var(--font-body)}
.toc a:hover {opacity:1;color:var(--c-main)}
.contact-box {border:1px solid var(--c-line-strong);border-radius:16px;padding:24px;background:var(--c-soft);margin-top:20px}
.contact-box .row-line {display:flex;flex-wrap:wrap;gap:8px 18px;padding:11px 0;border-bottom:1px dashed var(--c-line);font-size:.93rem}
.contact-box .row-line:last-child {border-bottom:none}
.contact-box .k {color:var(--c-main);font-weight:600;min-width:104px}
.contact-box .v {color:var(--c-text);opacity:.85;line-height:1.7}
.back-top {display:inline-flex;align-items:center;gap:8px;margin-top:34px;color:var(--c-main);text-decoration:none;font-size:.9rem;font-weight:600;transition:.2s}
.back-top:hover {color:var(--c-accent)}
.doc-block {padding:24px 0}
.contact-box .k {min-width:100%}
.note-card {padding:15px 16px;gap:11px}