:root{
  --main:#38bdf8;
  --accent:#a78bfa;
  --bg:#0f172a;
  --text:#e2e8f0;
  --panel:#16213a;
  --panel-2:#1b2742;
  --line:rgba(226,232,240,.10);
  --line-strong:rgba(226,232,240,.18);
  --muted:#93a4bd;
  --r:8px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:76px;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Noto Sans SC","Source Han Sans SC","思源黑体","Inter","Helvetica Neue",Arial,sans-serif;
  font-size:14px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  background-image:
    linear-gradient(to right, rgba(226,232,240,.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(226,232,240,.035) 1px, transparent 1px);
  background-size:44px 44px;
}
h1,h2,h3,h4,.serif{
  font-family:"Noto Serif SC","Source Han Serif SC","思源宋体","Songti SC",Georgia,serif;
  letter-spacing:.01em;
  line-height:1.35;
  margin:0;
}
a{text-decoration:none;color:inherit;}
img{max-width:100%;display:block;}
::selection{background:rgba(56,189,248,.32);color:#fff;}

/* ---------- nav ---------- */
.topnav{
  position:sticky;top:0;z-index:1000;
  background:rgba(15,23,42,.82);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  max-width:1180px;margin:0 auto;padding:0 18px;
  height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{
  display:inline-flex;align-items:center;gap:9px;
  font-family:"Noto Serif SC","Source Han Serif SC","思源宋体",serif;
  font-size:19px;font-weight:800;color:#fff;letter-spacing:.02em;white-space:nowrap;
}
.brand i{color:var(--main);font-size:17px;}
.brand .dot{color:var(--accent);}
.nav-links{display:flex;align-items:center;gap:4px;flex-wrap:wrap;}
.nav-links a{
  font-size:13.5px;color:var(--muted);padding:7px 12px;border-radius:var(--r);
  transition:.18s ease;white-space:nowrap;
}
.nav-links a:hover{color:#fff;background:rgba(56,189,248,.10);}
.nav-links a.active{color:var(--main);background:rgba(56,189,248,.12);}
.nav-toggle{
  display:none;background:transparent;border:1px solid var(--line-strong);color:var(--text);
  width:38px;height:36px;border-radius:var(--r);font-size:16px;cursor:pointer;
}
@media(max-width:860px){
  .nav-toggle{display:block;}
  .nav-links{
    display:none;position:absolute;left:0;right:0;top:64px;
    background:#101b30;border-bottom:1px solid var(--line);
    flex-direction:column;align-items:stretch;padding:8px 14px 14px;gap:2px;
  }
  .nav-links.open{display:flex;}
  .nav-links a{padding:10px 12px;}
}

/* ---------- hero split ---------- */
.hero{
  border-bottom:1px solid var(--line);
}
.hero-split{
  max-width:1180px;margin:0 auto;
  display:grid;grid-template-columns:1.05fr .95fr;min-height:520px;
}
.hero-left{
  padding:64px 40px 56px 18px;
  display:flex;flex-direction:column;justify-content:center;
  position:relative;
}
.hero-left::after{
  content:"";position:absolute;right:0;top:34px;bottom:34px;width:1px;
  background:linear-gradient(to bottom,transparent,var(--line-strong),transparent);
}
.hero-tag{
  display:inline-flex;align-items:center;gap:7px;align-self:flex-start;
  font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--main);border:1px solid rgba(56,189,248,.34);
  background:rgba(56,189,248,.07);padding:4px 11px;border-radius:999px;margin-bottom:20px;
}
.hero h1{
  font-size:clamp(29px,3.9vw,46px);font-weight:800;color:#f8fafc;margin-bottom:16px;
}
.hero h1 em{font-style:normal;color:var(--main);}
.hero h1 span.hl{color:var(--accent);}
.hero-sub{
  font-size:14.5px;color:var(--muted);max-width:520px;margin-bottom:26px;line-height:1.85;
}
.hero-btns{display:flex;gap:12px;flex-wrap:wrap;}
.btn-main,.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;
  padding:11px 22px;border-radius:var(--r);transition:.2s ease;border:1px solid transparent;
}
.btn-main{background:var(--main);color:#07202e;}
.btn-main:hover{background:#5cc9f9;transform:translateY(-2px);box-shadow:0 8px 22px -10px rgba(56,189,248,.8);color:#07202e;}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-strong);}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px);}
.hero-stats{display:flex;gap:26px;margin-top:34px;flex-wrap:wrap;}
.hero-stats .st b{display:block;font-family:"Noto Serif SC",serif;font-size:22px;color:#fff;line-height:1.2;}
.hero-stats .st span{font-size:11.5px;color:var(--muted);letter-spacing:.05em;}

.hero-right{
  background:
    radial-gradient(circle at 82% 20%, rgba(167,139,250,.16), transparent 55%),
    radial-gradient(circle at 20% 88%, rgba(56,189,248,.13), transparent 55%),
    var(--panel);
  padding:36px 18px 36px 40px;
  display:flex;flex-direction:column;justify-content:center;gap:10px;
  border-left:1px solid var(--line);
}
.hero-right .rh{
  font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted);
  display:flex;align-items:center;gap:8px;margin-bottom:6px;
}
.hero-right .rh::before{content:"";width:22px;height:1px;background:var(--accent);}
.mini-card{
  background:rgba(15,23,42,.55);border:1px solid var(--line);border-radius:var(--r);
  padding:12px 14px;display:flex;gap:12px;align-items:flex-start;transition:.2s ease;
}
.mini-card:hover{border-color:rgba(56,189,248,.42);background:rgba(56,189,248,.06);transform:translateX(3px);}
.mini-card .idx{
  font-family:"Inter",sans-serif;font-size:11px;font-weight:700;color:var(--accent);
  border:1px solid rgba(167,139,250,.35);border-radius:5px;min-width:26px;height:22px;
  display:flex;align-items:center;justify-content:center;margin-top:1px;
}
.mini-card .mc-t{font-size:13.5px;color:#f1f5f9;font-weight:600;margin-bottom:2px;}
.mini-card .mc-d{font-size:12px;color:var(--muted);line-height:1.6;}
@media(max-width:900px){
  .hero-split{grid-template-columns:1fr;min-height:0;}
  .hero-left{padding:46px 18px 34px;}
  .hero-left::after{display:none;}
  .hero-right{padding:28px 18px 34px;border-left:none;border-top:1px solid var(--line);}
}

/* ---------- section shell ---------- */
.sec{max-width:1180px;margin:0 auto;padding:64px 18px;border-top:1px solid var(--line);}
.sec:first-of-type{border-top:none;}
.sec-head{margin-bottom:30px;max-width:760px;}
.kicker{
  font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--main);
  display:inline-flex;align-items:center;gap:8px;margin-bottom:10px;
}
.kicker::before{content:"";width:18px;height:1px;background:var(--main);}
.sec-head h2{font-size:clamp(22px,2.6vw,30px);color:#f8fafc;font-weight:800;margin-bottom:10px;}
.sec-head p{font-size:13.5px;color:var(--muted);line-height:1.85;margin:0;}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .62s cubic-bezier(.22,.68,.35,1),transform .62s cubic-bezier(.22,.68,.35,1);}
.reveal.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none;}}

/* ---------- compare table ---------- */
.table-wrap{
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--panel);
}
.cmp-table{width:100%;border-collapse:collapse;font-size:13px;}
.cmp-table thead th{
  background:var(--panel-2);color:#f1f5f9;font-weight:700;font-size:12.5px;
  letter-spacing:.04em;padding:13px 16px;text-align:left;border-bottom:1px solid var(--line-strong);
  white-space:nowrap;
}
.cmp-table thead th.hi{color:var(--main);}
.cmp-table tbody td{
  padding:12px 16px;border-bottom:1px solid var(--line);color:var(--muted);vertical-align:top;line-height:1.7;
}
.cmp-table tbody tr:last-child td{border-bottom:none;}
.cmp-table tbody tr{transition:background .18s ease;}
.cmp-table tbody tr:hover{background:rgba(56,189,248,.055);}
.cmp-table tbody td:first-child{color:#e8eefb;font-weight:600;white-space:nowrap;}
.cmp-table .tick{color:var(--main);margin-right:5px;}
.cmp-table .cross{color:#64748b;margin-right:5px;}
.table-note{font-size:11.5px;color:#708295;margin-top:10px;line-height:1.7;}

/* ---------- features ---------- */
.feat-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:14px;
}
.feat{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
  padding:20px 18px;transition:.22s ease;
}
.feat:hover{border-color:rgba(56,189,248,.4);transform:translateY(-3px);box-shadow:0 12px 26px -18px rgba(56,189,248,.9);}
.feat .fic{
  width:36px;height:36px;border-radius:var(--r);display:flex;align-items:center;justify-content:center;
  background:rgba(56,189,248,.10);color:var(--main);font-size:15px;margin-bottom:12px;
  border:1px solid rgba(56,189,248,.2);
}
.feat:nth-child(3n+2) .fic{background:rgba(167,139,250,.10);color:var(--accent);border-color:rgba(167,139,250,.22);}
.feat h3{font-size:15px;color:#f1f5f9;font-weight:700;margin-bottom:7px;}
.feat p{font-size:12.5px;color:var(--muted);line-height:1.8;margin:0;}
.feat ul{list-style:none;padding:0;margin:10px 0 0;}
.feat ul li{font-size:12px;color:#9fb0c7;padding-left:16px;position:relative;line-height:1.9;}
.feat ul li::before{content:"›";position:absolute;left:2px;color:var(--main);font-weight:700;}
@media(max-width:900px){.feat-grid{grid-template-columns:1fr 1fr;}}
@media(max-width:600px){.feat-grid{grid-template-columns:1fr;}}

/* ---------- intro / posters ---------- */
.intro-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:26px;align-items:start;}
.intro-text p{font-size:13.5px;color:var(--muted);line-height:1.95;margin:0 0 13px;}
.intro-text p strong{color:#e8eefb;font-weight:600;}
.poster-rows{display:grid;grid-template-columns:1fr 1fr;gap:12px;}
.pcard{
  position:relative;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);
  background:var(--panel);aspect-ratio:4/3;
}
.pcard img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;}
.pcard:hover img{transform:scale(1.08);}
.pcard .ov{
  position:absolute;inset:0;display:flex;flex-direction:column;justify-content:flex-end;
  padding:12px;background:linear-gradient(to top,rgba(8,14,26,.94) 8%,rgba(8,14,26,.55) 48%,transparent 82%);
  opacity:0;transition:opacity .35s ease;
}
.pcard:hover .ov{opacity:1;}
.pcard .ov b{font-size:13px;color:#fff;font-weight:700;line-height:1.4;}
.pcard .ov span{font-size:11px;color:var(--main);letter-spacing:.04em;margin-top:3px;}
@media(max-width:900px){.intro-grid{grid-template-columns:1fr;}}

/* ---------- faq accordion ---------- */
.acc{display:flex;flex-direction:column;gap:9px;max-width:900px;}
.acc-item{border:1px solid var(--line);border-radius:var(--r);background:var(--panel);overflow:hidden;transition:.2s ease;}
.acc-item:hover{border-color:var(--line-strong);}
.acc-item.open{border-color:rgba(56,189,248,.40);background:rgba(56,189,248,.045);}
.acc-q{
  width:100%;text-align:left;background:transparent;border:0;color:#f1f5f9;
  font-size:13.5px;font-weight:600;padding:14px 46px 14px 16px;cursor:pointer;position:relative;
  font-family:inherit;line-height:1.6;
}
.acc-q i{
  position:absolute;right:16px;top:50%;transform:translateY(-50%);
  font-size:12px;color:var(--main);transition:transform .28s ease;
}
.acc-item.open .acc-q i{transform:translateY(-50%) rotate(180deg);}
.acc-a{max-height:0;overflow:hidden;transition:max-height .32s ease;}
.acc-a .inner{padding:0 16px 15px;font-size:12.8px;color:var(--muted);line-height:1.9;border-top:1px solid var(--line);}
.acc-a .inner{padding-top:12px;}

/* ---------- cta ---------- */
.cta-band{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:
    radial-gradient(ellipse at 50% 0%, rgba(56,189,248,.14), transparent 62%),
    var(--panel);
}
.cta-inner{max-width:1180px;margin:0 auto;padding:56px 18px;text-align:center;}
.cta-inner h2{font-size:clamp(22px,2.7vw,31px);color:#f8fafc;font-weight:800;margin-bottom:12px;}
.cta-inner h2 em{font-style:normal;color:var(--accent);}
.cta-inner p{font-size:13.5px;color:var(--muted);max-width:600px;margin:0 auto 24px;line-height:1.9;}
.cta-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;}

/* ---------- footer ---------- */
.site-footer{background:#0a1222;border-top:1px solid var(--line);}
.f-inner{max-width:1180px;margin:0 auto;padding:44px 18px 0;}
.f-cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:26px;padding-bottom:32px;}
.f-brand{font-family:"Noto Serif SC","Source Han Serif SC","思源宋体",serif;font-size:17px;font-weight:800;color:#fff;display:inline-flex;align-items:center;gap:8px;margin-bottom:10px;}
.f-brand i{color:var(--main);font-size:15px;}
.f-desc{font-size:12.3px;color:#7d8ea5;line-height:1.9;margin:0;max-width:300px;}
.f-col h4{font-size:12px;letter-spacing:.13em;text-transform:uppercase;color:#93a4bd;font-weight:700;margin-bottom:12px;font-family:"Inter",sans-serif;}
.f-col a{display:block;font-size:12.5px;color:#8999b0;padding:4px 0;transition:.16s;}
.f-col a:hover{color:var(--main);}
.friend-links{
  border-top:1px solid var(--line);padding:20px 0;font-size:12.3px;color:#7d8ea5;line-height:2;
}
.friend-links b{color:#c4d2e6;font-weight:600;margin-right:10px;font-size:12px;letter-spacing:.06em;}
.friend-links a{color:#8999b0;margin-right:14px;}
.friend-links a:hover{color:var(--accent);}
.f-bottom{
  border-top:1px solid var(--line);padding:16px 0 22px;display:flex;justify-content:space-between;
  gap:12px;flex-wrap:wrap;font-size:11.8px;color:#6d7e95;
}
@media(max-width:860px){
  .f-cols{grid-template-columns:1fr 1fr;gap:22px;}
}
@media(max-width:520px){
  .f-cols{grid-template-columns:1fr;}
}

/* --- 子页面追加 --- */
.guide-wrap {max-width:1080px;margin:0 auto;padding:0 20px;}
.crumb {font-size:13px;color:var(--muted);margin:26px 0 0;}
.crumb a {color:var(--muted);text-decoration:none;}
.crumb a:hover {color:var(--main);}
.crumb span {color:var(--main);}
.step-card {
    background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
    padding:22px 22px 20px;height:100%;
  }
.step-card .num {
    display:inline-flex;align-items:center;justify-content:center;
    width:34px;height:34px;border-radius:50%;
    background:linear-gradient(135deg,var(--main),var(--accent));
    color:#0b1220;font-weight:800;font-size:15px;margin-bottom:14px;
  }
.step-card h3 {font-size:17px;font-weight:700;margin:0 0 10px;}
.step-card p {font-size:14px;line-height:1.75;color:var(--muted);margin:0;}
.tip-list {list-style:none;padding:0;margin:0;}
.tip-list li {
    position:relative;padding:14px 16px 14px 44px;
    background:var(--panel-2);border:1px solid var(--line);border-radius:var(--r);
    margin-bottom:12px;font-size:14px;line-height:1.75;color:var(--text);
  }
.tip-list li i {
    position:absolute;left:16px;top:16px;color:var(--main);font-size:15px;
  }
.tip-list li b {color:var(--main);}
.faq-item {
    background:var(--panel);border:1px solid var(--line);border-radius:var(--r);
    padding:18px 20px;margin-bottom:12px;
  }
.faq-item h3 {font-size:15.5px;font-weight:700;margin:0 0 8px;color:var(--text);}
.faq-item h3 i {color:var(--accent);margin-right:8px;font-size:13px;}
.faq-item p {font-size:14px;line-height:1.75;color:var(--muted);margin:0;}
.cta-box {
    background:linear-gradient(135deg,rgba(56,189,248,.12),rgba(167,139,250,.12));
    border:1px solid var(--line-strong);border-radius:var(--r);
    padding:30px 26px;text-align:center;
  }
.cta-box h2 {font-size:22px;font-weight:800;margin:0 0 10px;}
.cta-box p {color:var(--muted);font-size:14.5px;margin:0 0 18px;line-height:1.7;}
.cta-box .hero-btns {display:flex;gap:12px;justify-content:center;flex-wrap:wrap;}
.cta-box .btn-main,.cta-box .btn-ghost {display:inline-block;padding:11px 24px;border-radius:var(--r);font-size:14px;font-weight:600;text-decoration:none;transition:.2s;}
.cta-box .btn-main {background:linear-gradient(135deg,var(--main),var(--accent));color:#0b1220;}
.cta-box .btn-main:hover {opacity:.9;}
.cta-box .btn-ghost {border:1px solid var(--line-strong);color:var(--text);}
.cta-box .btn-ghost:hover {border-color:var(--main);color:var(--main);}
.guide-img {
    width:100%;border-radius:var(--r);border:1px solid var(--line);
    display:block;object-fit:cover;
  }
.step-card {margin-bottom:14px;}

/* --- 子页面追加 --- */
.about-hero {padding:64px 0 40px;}
.about-hero h1 {font-size:clamp(26px,4vw,40px);font-weight:800;line-height:1.28;letter-spacing:-.5px;margin:0 0 16px;}
.about-hero h1 em {font-style:normal;color:var(--main);}
.about-lead {color:var(--muted);font-size:16px;line-height:1.9;max-width:760px;}
.about-block {padding:42px 0;border-top:1px solid var(--line);}
.about-block h2 {font-size:clamp(20px,2.6vw,26px);font-weight:800;margin:0 0 10px;letter-spacing:-.3px;}
.about-block h2 span {color:var(--accent);}
.about-block p {color:var(--muted);line-height:1.95;font-size:15px;margin:0 0 14px;}
.about-block p strong {color:var(--text);font-weight:600;}
.about-grid {display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin-top:22px;}
.about-item {background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:20px 20px 18px;transition:border-color .2s,transform .2s;}
.about-item:hover {border-color:var(--line-strong);transform:translateY(-2px);}
.about-item .ico {width:36px;height:36px;border-radius:9px;display:flex;align-items:center;justify-content:center;background:rgba(56,189,248,.12);color:var(--main);font-size:16px;margin-bottom:12px;}
.about-item h3 {font-size:16px;font-weight:700;margin:0 0 8px;}
.about-item p {font-size:14px;line-height:1.8;margin:0;color:var(--muted);}
.principle-list {list-style:none;padding:0;margin:20px 0 0;}
.principle-list li {position:relative;padding:14px 16px 14px 44px;background:var(--panel-2);border:1px solid var(--line);border-radius:var(--r);margin-bottom:12px;color:var(--muted);font-size:14.5px;line-height:1.85;}
.principle-list li i {position:absolute;left:16px;top:16px;color:var(--main);font-size:15px;}
.principle-list li b {color:var(--text);font-weight:600;}
.about-quote {margin:26px 0 0;padding:20px 22px;border-left:3px solid var(--main);background:var(--panel);border-radius:0 var(--r) var(--r) 0;color:var(--text);font-size:15px;line-height:1.9;}
.about-cta {margin-top:36px;display:flex;flex-wrap:wrap;gap:12px;}
.about-hero {padding:40px 0 26px;}
.about-block {padding:32px 0;}

/* --- 子页面追加 --- */
.legal-wrap {max-width:900px;margin:0 auto;}
.legal-block {background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:26px 28px;margin-bottom:20px;}
.legal-block h2 {font-size:1.22rem;color:var(--text);margin:0 0 14px;display:flex;align-items:center;gap:10px;line-height:1.5;}
.legal-block h2 i {color:var(--main);font-size:1rem;}
.legal-block p {color:var(--muted);line-height:1.95;margin:0 0 12px;font-size:.95rem;}
.legal-block p:last-child {margin-bottom:0;}
.legal-block ul {margin:0 0 12px;padding-left:20px;}
.legal-block li {color:var(--muted);line-height:1.9;font-size:.95rem;margin-bottom:6px;}
.legal-block strong {color:var(--text);font-weight:600;}
.legal-block a {color:var(--main);text-decoration:none;border-bottom:1px dashed rgba(56,189,248,.4);}
.legal-block a:hover {color:var(--accent);border-bottom-color:var(--accent);}
.legal-meta {display:flex;flex-wrap:wrap;gap:10px 24px;font-size:.85rem;color:var(--muted);border-top:1px solid var(--line);margin-top:16px;padding-top:14px;}
.legal-meta span i {color:var(--accent);margin-right:6px;}
.legal-tip {background:var(--panel-2);border-left:3px solid var(--accent);border-radius:0 var(--r) var(--r) 0;padding:16px 20px;margin:16px 0 0;}
.legal-tip p {margin:0;color:var(--muted);font-size:.92rem;}
.legal-nav {display:flex;flex-wrap:wrap;gap:10px;margin-bottom:24px;}
.legal-nav a {font-size:.85rem;color:var(--muted);background:var(--panel-2);border:1px solid var(--line);border-radius:999px;padding:6px 16px;text-decoration:none;transition:.2s;}
.legal-nav a:hover {color:var(--main);border-color:var(--line-strong);}
.legal-block {padding:20px 18px;}
.legal-block h2 {font-size:1.08rem;}