:root{
  --primary:#4f46e5;
  --accent:#7c3aed;
  --bg:#f5f3ff;
  --text:#1e1b4b;
  --line:rgba(79,70,229,.14);
  --soft:rgba(30,27,75,.62);
  --card:#ffffff;
  --serif:"Noto Serif SC","思源宋体",Georgia,serif;
  --sans:"Inter","Noto Sans SC","思源黑体",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  position:relative;
}
/* 顶部细微噪点纹理 */
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  opacity:.055;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
}
h1,h2,h3,h4,.serif{font-family:var(--serif);letter-spacing:.01em;}
a{color:var(--primary);text-decoration:none;}
a:hover{color:var(--accent);}
.container-narrow{max-width:820px;margin:0 auto;padding:0 22px;}
.container-wide{max-width:1040px;margin:0 auto;padding:0 22px;}

/* 导航 */
.site-nav{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(245,243,255,0);
  transition:background .35s ease, box-shadow .35s ease, border-color .35s ease;
  border-bottom:1px solid transparent;
  backdrop-filter:blur(0px);
}
.site-nav.scrolled{
  background:rgba(245,243,255,.88);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 18px rgba(30,27,75,.05);
}
.nav-inner{
  max-width:1040px;margin:0 auto;padding:0 22px;
  height:66px;display:flex;align-items:center;justify-content:space-between;
}
.brand-link{
  display:flex;align-items:center;gap:.5rem;
  font-family:var(--serif);font-weight:700;font-size:1.12rem;
  color:var(--text);letter-spacing:.02em;
}
.brand-link:hover{color:var(--primary);}
.brand-link i{color:var(--accent);font-size:1rem;}
.nav-links{display:flex;align-items:center;gap:1.6rem;list-style:none;margin:0;padding:0;}
.nav-links a{
  font-size:.9rem;color:var(--soft);font-weight:500;position:relative;padding:.2rem 0;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;
  background:var(--accent);transition:width .25s ease;border-radius:2px;
}
.nav-links a:hover{color:var(--primary);}
.nav-links a:hover::after{width:100%;}
.nav-toggle{
  display:none;background:none;border:1px solid var(--line);border-radius:8px;
  color:var(--text);width:40px;height:36px;align-items:center;justify-content:center;
}
@media(max-width:860px){
  .nav-links{
    position:absolute;top:66px;left:0;right:0;
    flex-direction:column;align-items:flex-start;gap:0;
    background:rgba(245,243,255,.98);
    border-bottom:1px solid var(--line);
    padding:0 22px;max-height:0;overflow:hidden;
    transition:max-height .35s ease, padding .35s ease;
    backdrop-filter:blur(14px);
  }
  .nav-links.open{max-height:340px;padding:12px 22px 18px;}
  .nav-links li{width:100%;}
  .nav-links a{display:block;padding:.7rem 0;font-size:.95rem;border-bottom:1px dashed var(--line);}
  .nav-links li:last-child a{border-bottom:none;}
  .nav-toggle{display:flex;}
}

/* Hero */
.hero{
  position:relative;min-height:88vh;display:flex;align-items:center;
  overflow:hidden;padding:130px 0 80px;
  background:#1e1b4b;
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url("{随机图片}");
  background-size:cover;background-position:center;
  filter:saturate(.85);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(30,27,75,.72) 0%,rgba(30,27,75,.86) 60%,rgba(30,27,75,.94) 100%);
}
.hero-inner{position:relative;z-index:2;}
.hero-kicker{
  display:inline-flex;align-items:center;gap:.5rem;
  font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;
  color:#c7c2ff;border:1px solid rgba(199,194,255,.35);
  padding:.35rem .85rem;border-radius:8px;margin-bottom:1.6rem;
}
.hero h1{
  font-size:clamp(2.4rem,6.2vw,4rem);line-height:1.2;font-weight:900;
  color:#fff;margin:0 0 1.4rem;letter-spacing:-.01em;
}
.hero h1 em{font-style:normal;color:#c4b5fd;}
.hero p.lead{
  color:rgba(255,255,255,.8);font-size:1.05rem;max-width:560px;line-height:1.9;
  margin:0 0 2.2rem;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:.9rem;}
.btn-main{
  display:inline-flex;align-items:center;gap:.5rem;
  background:var(--primary);color:#fff;font-weight:600;font-size:.94rem;
  padding:.78rem 1.6rem;border-radius:8px;border:1px solid var(--primary);
  transition:transform .2s ease,background .2s ease,box-shadow .2s ease;
}
.btn-main:hover{background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-2px);box-shadow:0 8px 24px rgba(124,58,237,.32);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:.5rem;
  background:transparent;color:#fff;font-weight:500;font-size:.94rem;
  padding:.78rem 1.6rem;border-radius:8px;border:1px solid rgba(255,255,255,.35);
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.7);color:#fff;transform:translateY(-2px);}

/* 区块通用 */
.section{padding:96px 0;position:relative;z-index:1;}
.section-tight{padding:72px 0;}
.eyebrow{
  font-size:.76rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--accent);font-weight:600;margin-bottom:.9rem;display:block;
}
.section-head{max-width:640px;margin-bottom:3rem;}
.section-head h2{
  font-size:clamp(1.75rem,3.6vw,2.5rem);font-weight:800;line-height:1.3;margin:0 0 1rem;
}
.section-head p{color:var(--soft);font-size:1rem;margin:0;}
.divider{height:1px;background:var(--line);border:0;margin:0;}

/* 使用说明:编号清单 */
.step-list{list-style:none;margin:0;padding:0;counter-reset:step;}
.step-item{
  display:grid;grid-template-columns:64px 1fr;gap:1.4rem;
  padding:2rem 0;border-bottom:1px dashed var(--line);
}
.step-item:last-child{border-bottom:none;}
.step-num{
  font-family:var(--serif);font-size:2.1rem;font-weight:700;line-height:1;
  color:var(--primary);opacity:.75;
}
.step-body h3{font-size:1.18rem;font-weight:700;margin:0 0 .5rem;}
.step-body p{margin:0;color:var(--soft);font-size:.96rem;}
@media(max-width:560px){
  .step-item{grid-template-columns:46px 1fr;gap:1rem;}
  .step-num{font-size:1.55rem;}
}

/* 特色对比表格 */
.table-wrap{
  background:var(--card);border:1px solid var(--line);border-radius:8px;overflow:hidden;
  box-shadow:0 1px 2px rgba(30,27,75,.03);
}
table.cmp{width:100%;border-collapse:collapse;font-size:.94rem;}
table.cmp thead th{
  background:rgba(79,70,229,.06);
  font-family:var(--serif);font-weight:700;font-size:.95rem;
  padding:1rem 1.2rem;text-align:left;color:var(--text);
  border-bottom:1px solid var(--line);white-space:nowrap;
}
table.cmp tbody td{
  padding:1rem 1.2rem;border-bottom:1px solid var(--line);color:var(--soft);vertical-align:top;
}
table.cmp tbody tr:last-child td{border-bottom:none;}
table.cmp tbody td:first-child{color:var(--text);font-weight:600;white-space:nowrap;}
table.cmp tbody tr{transition:background .2s ease;}
table.cmp tbody tr:hover{background:rgba(124,58,237,.045);}
.check{color:var(--primary);font-weight:700;}
.cross{color:rgba(30,27,75,.3);font-weight:700;}
@media(max-width:720px){
  .table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
  table.cmp{min-width:600px;}
}

/* 特色卡片网格(错落渐显) */
.feature-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.2rem;
}
.f-card{
  background:var(--card);border:1px solid var(--line);border-radius:8px;
  padding:1.85rem 1.6rem;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  will-change:transform;
}
.f-card:hover{
  transform:scale(1.025);
  border-color:var(--accent);
  box-shadow:0 10px 30px rgba(79,70,229,.1);
}
.f-icon{
  width:46px;height:46px;border-radius:8px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--primary);font-size:1.1rem;
  margin-bottom:1.15rem;background:rgba(79,70,229,.04);
  transition:color .25s ease,border-color .25s ease;
}
.f-card:hover .f-icon{color:var(--accent);border-color:var(--accent);}
.f-card h3{font-size:1.08rem;font-weight:700;margin:0 0 .6rem;}
.f-card p{margin:0;color:var(--soft);font-size:.92rem;line-height:1.8;}

/* 长文 */
.longform p{color:#3a3670;font-size:1.02rem;line-height:2;margin:0 0 1.5rem;}
.longform h3{font-size:1.35rem;font-weight:700;margin:2.6rem 0 1rem;}
.longform blockquote{
  margin:2rem 0;padding:1.2rem 1.5rem;border-left:3px solid var(--accent);
  background:rgba(124,58,237,.045);border-radius:0 8px 8px 0;
  font-family:var(--serif);font-size:1.05rem;color:var(--text);line-height:1.9;
}
.longform blockquote p:last-child{margin-bottom:0;}
.longform strong{color:var(--primary);font-weight:600;}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:.9rem;}
.faq-item{
  background:var(--card);border:1px solid var(--line);border-radius:8px;overflow:hidden;
  transition:border-color .25s ease;
}
.faq-item:hover{border-color:rgba(124,58,237,.35);}
.faq-q{
  width:100%;background:none;border:none;text-align:left;
  padding:1.15rem 1.35rem;display:flex;align-items:center;justify-content:space-between;
  gap:1rem;font-family:var(--sans);font-size:.99rem;font-weight:600;color:var(--text);
  cursor:pointer;line-height:1.6;
}
.faq-q i{color:var(--accent);font-size:.8rem;transition:transform .3s ease;flex-shrink:0;}
.faq-item.open .faq-q i{transform:rotate(45deg);}
.faq-a{
  max-height:0;overflow:hidden;transition:max-height .35s ease;
}
.faq-a p{
  margin:0;padding:0 1.35rem 1.25rem;color:var(--soft);font-size:.94rem;line-height:1.9;
}

/* CTA */
.cta-band{
  background:linear-gradient(135deg,var(--primary) 0%,var(--accent) 100%);
  border-radius:8px;padding:3.4rem 2rem;text-align:center;position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.1;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n2'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/></filter><rect width='120' height='120' filter='url(%23n2)'/></svg>");
}
.cta-band h2{
  position:relative;color:#fff;font-size:clamp(1.6rem,3.2vw,2.2rem);
  font-weight:800;margin:0 0 1rem;line-height:1.35;
}
.cta-band p{
  position:relative;color:rgba(255,255,255,.85);max-width:520px;margin:0 auto 2rem;
  font-size:.98rem;line-height:1.9;
}
.cta-band .btn-white{
  position:relative;display:inline-flex;align-items:center;gap:.5rem;
  background:#fff;color:var(--primary);font-weight:600;font-size:.94rem;
  padding:.8rem 1.7rem;border-radius:8px;border:1px solid #fff;
  transition:transform .2s ease,box-shadow .2s ease;
}
.cta-band .btn-white:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(0,0,0,.18);color:var(--primary);}

/* 友链 + 页脚 */
.friend-links{
  padding:48px 0 40px;border-top:1px solid var(--line);
  background:rgba(255,255,255,.5);
  position:relative;z-index:1;
}
.friend-links h4{
  font-size:.82rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--soft);font-weight:600;margin:0 0 1rem;font-family:var(--sans);
}
.friend-links .fl-row{
  display:flex;flex-wrap:wrap;gap:.6rem 1.4rem;font-size:.9rem;color:var(--soft);
}
.site-footer{
  padding:44px 0 40px;position:relative;z-index:1;border-top:1px solid var(--line);
}
.footer-inner{
  display:flex;flex-wrap:wrap;gap:2rem;justify-content:space-between;align-items:flex-start;
}
.footer-brand{font-family:var(--serif);font-weight:700;font-size:1.05rem;margin-bottom:.6rem;color:var(--text);display:flex;align-items:center;gap:.5rem;}
.footer-brand i{color:var(--accent);}
.footer-desc{color:var(--soft);font-size:.88rem;max-width:340px;margin:0;line-height:1.8;}
.footer-cols{display:flex;flex-wrap:wrap;gap:2.6rem;}
.footer-col h5{
  font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--soft);
  font-weight:600;margin:0 0 .8rem;font-family:var(--sans);
}
.footer-col ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.5rem;}
.footer-col a{font-size:.88rem;color:#4b4780;}
.footer-col a:hover{color:var(--accent);}
.copyright{
  margin-top:2.4rem;padding-top:1.4rem;border-top:1px solid var(--line);
  font-size:.82rem;color:var(--soft);display:flex;flex-wrap:wrap;gap:.6rem;justify-content:space-between;
}

/* 滚动渐显 */
.reveal{
  opacity:0;transform:translateY(26px);
  transition:opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1);
}
.reveal.in{opacity:1;transform:translateY(0);}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
}

/* --- 子页面追加 --- */
/* 本页专属少量样式，其余复用站点样式表 */
  .about-lead {max-width:760px;margin:0 auto;text-align:center;}
.about-lead p {color:var(--soft);line-height:1.9;font-size:1.05rem;}
.about-grid {display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:38px;}
.about-card {
    background:var(--card);
    border:1px solid var(--line);
    border-radius:16px;
    padding:26px 24px;
    transition:transform .25s ease, box-shadow .25s ease;
  }
.about-card:hover {transform:translateY(-4px);box-shadow:0 16px 34px rgba(79,70,229,.12);}
.about-card i {font-size:1.5rem;color:var(--primary);margin-bottom:14px;display:inline-block;}
.about-card h3 {font-size:1.05rem;font-weight:700;color:var(--text);margin-bottom:10px;line-height:1.5;}
.about-card p {color:var(--soft);font-size:.93rem;line-height:1.8;margin:0;}
.about-split {display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
.about-split .txt p {color:var(--soft);line-height:1.95;margin-bottom:16px;}
.about-split .txt strong {color:var(--primary);font-weight:600;}
.about-figure {
    border-radius:20px;overflow:hidden;border:1px solid var(--line);
    box-shadow:0 20px 44px rgba(79,70,229,.14);
  }
.about-figure img {width:100%;display:block;height:100%;object-fit:cover;}
.num-row {display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:34px;}
.num-item {
    text-align:center;background:var(--card);border:1px solid var(--line);
    border-radius:14px;padding:22px 12px;
  }
.num-item b {display:block;font-size:1.65rem;font-weight:800;color:var(--primary);letter-spacing:-.5px;}
.num-item span {color:var(--soft);font-size:.85rem;letter-spacing:.02em;}
.principles {display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:36px;}
.principle {
    background:linear-gradient(160deg,rgba(79,70,229,.06),rgba(124,58,237,.03));
    border:1px solid var(--line);border-radius:16px;padding:26px 24px;
  }
.principle h3 {font-size:1.02rem;font-weight:700;color:var(--text);margin-bottom:10px;display:flex;align-items:center;gap:10px;}
.principle h3 i {color:var(--accent);font-size:.95rem;}
.principle p {color:var(--soft);font-size:.92rem;line-height:1.85;margin:0;}
.about-grid {grid-template-columns:1fr;}
.about-split {grid-template-columns:1fr;gap:30px;}
.num-row {grid-template-columns:repeat(2,1fr);}
.principles {grid-template-columns:1fr;}

/* --- 子页面追加 --- */
.nav-links a.active {color:#fff;background:linear-gradient(120deg,var(--primary),var(--accent));}
.hero p {color:var(--soft);font-size:1.01rem;margin:0;max-width:680px;}
.hero-meta {
    display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:24px;
    font-size:.85rem;color:var(--soft);
  }
.hero-meta span i {color:var(--primary);margin-right:6px;}
.doc-card {
    background:var(--card);
    border:1px solid var(--line);
    border-radius:18px;
    padding:30px 30px 26px;
    box-shadow:0 12px 34px -22px rgba(30,27,75,.35);
  }
.doc-card + .doc-card {margin-top:22px;}
.doc-card h3 {
    font-size:1.1rem;font-weight:800;margin:0 0 12px;line-height:1.5;
    display:flex;align-items:flex-start;gap:10px;
  }
.doc-card h3 i {color:var(--primary);margin-top:5px;font-size:.98rem;flex:0 0 auto;}
.doc-card p {color:var(--soft);margin:0 0 12px;font-size:.95rem;}
.doc-card p:last-child {margin-bottom:0;}
.doc-card ul {margin:0 0 12px;padding-left:20px;color:var(--soft);font-size:.95rem;}
.doc-card ul li {margin-bottom:7px;}
.doc-card ul li:last-child {margin-bottom:0;}
.doc-card strong {color:var(--text);font-weight:700;}
.step-item h4 {font-size:1rem;font-weight:800;margin:2px 0 6px;}
.step-item p {margin:0;color:var(--soft);font-size:.93rem;}
table.doc-table {width:100%;border-collapse:collapse;min-width:560px;font-size:.92rem;}
table.doc-table th,table.doc-table td {
    padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;
  }
table.doc-table thead th {
    background:rgba(79,70,229,.07);color:var(--text);font-weight:800;font-size:.86rem;
    letter-spacing:.02em;white-space:nowrap;
  }
table.doc-table tbody td {color:var(--soft);}
table.doc-table tbody tr:last-child td {border-bottom:0;}
table.doc-table tbody td:first-child {color:var(--text);font-weight:600;white-space:nowrap;}
.check,.cross {display:inline-flex;align-items:center;gap:7px;font-weight:600;font-size:.9rem;}
.check i {color:#0f9d58;}
.cross i {color:#d93025;}
.note-box {
    border-left:4px solid var(--accent);
    background:linear-gradient(100deg,rgba(124,58,237,.08),rgba(79,70,229,.04));
    border-radius:0 14px 14px 0;
    padding:16px 20px;margin:18px 0 0;
    color:var(--soft);font-size:.93rem;
  }
.note-box strong {color:var(--text);}
.footer-grid {
    display:flex;flex-wrap:wrap;gap:26px;justify-content:space-between;align-items:flex-start;
  }
.footer-brand .brand-link {font-size:1rem;margin-bottom:10px;}
.footer-brand p {color:var(--soft);font-size:.88rem;margin:0;}
.footer-links {display:flex;flex-wrap:wrap;gap:8px 22px;}
.footer-links a {color:var(--soft);font-size:.9rem;font-weight:500;}
.footer-links a:hover {color:var(--primary);}
.footer-bottom {
    margin-top:26px;padding-top:18px;border-top:1px solid var(--line);
    font-size:.82rem;color:var(--soft);display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  }
.doc-card {padding:24px 20px;}

/* --- 子页面追加 --- */
.guide-grid {display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:22px;margin-top:8px;}
.guide-card {background:var(--card);border:1px solid var(--line);border-radius:18px;padding:26px 24px;transition:.25s ease;height:100%;}
.guide-card:hover {transform:translateY(-4px);box-shadow:0 18px 40px rgba(79,70,229,.12);border-color:rgba(79,70,229,.28);}
.guide-card .gc-ico {width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;font-size:1.05rem;margin-bottom:16px;}
.guide-card h3 {font-size:1.06rem;font-weight:700;margin:0 0 10px;color:var(--text);}
.guide-card p {font-size:.94rem;line-height:1.75;color:var(--soft);margin:0;}
.compare-table {width:100%;border-collapse:collapse;font-size:.94rem;}
.compare-table th,.compare-table td {padding:15px 18px;text-align:left;border-bottom:1px solid var(--line);}
.compare-table thead th {background:rgba(79,70,229,.06);color:var(--text);font-weight:700;font-size:.9rem;letter-spacing:.02em;}
.compare-table tbody td {color:var(--soft);}
.compare-table tbody td:first-child {color:var(--text);font-weight:600;}
.compare-table tbody tr:hover {background:rgba(79,70,229,.035);}
.faq-item h3 {font-size:1rem;font-weight:700;margin:0 0 10px;color:var(--text);display:flex;gap:10px;align-items:flex-start;}
.faq-item h3 i {color:var(--primary);margin-top:3px;font-size:.9rem;}
.faq-item p {margin:0;font-size:.94rem;line-height:1.78;color:var(--soft);}
.note-box p {margin:0;font-size:.94rem;line-height:1.78;color:var(--text);}
.story-row {display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:center;}
.story-row img {width:100%;border-radius:20px;border:1px solid var(--line);display:block;}
.story-row h3 {font-size:1.15rem;font-weight:800;margin:0 0 12px;color:var(--text);}
.story-row p {font-size:.95rem;line-height:1.85;color:var(--soft);margin:0 0 14px;}
.story-row {grid-template-columns:1fr;gap:22px;}
.compare-table th,.compare-table td {padding:12px 12px;font-size:.86rem;}