*{box-sizing:border-box}
html{scroll-behavior:smooth}
:root{
  --bg:#f3fbff;
  --bg2:#eef8ff;
  --ink:#061522;
  --muted:#64758a;
  --line:#dbeaf5;
  --panel:#ffffff;
  --soft:#f8fdff;
  --blue:#46b8ff;
  --cyan:#55e0f4;
  --violet:#8c7cff;
  --deep:#07162a;
  --deep2:#102a44;
  --mint:#d9fbff;
  --shadow:0 26px 80px rgba(22,67,105,.12);
  --shadow2:0 16px 42px rgba(70,184,255,.18);
  --container:1240px;
}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  color:var(--ink);
  background:
    radial-gradient(circle at 8% 6%, rgba(85,224,244,.32), transparent 34%),
    radial-gradient(circle at 92% 12%, rgba(140,124,255,.22), transparent 30%),
    linear-gradient(180deg,#f7fdff 0%,#eef8ff 50%,#f9fcff 100%);
  overflow-x:hidden;
}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%;height:auto}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
body.lock{overflow:hidden}
.site-header{
  width:min(var(--container),calc(100% - 32px));
  margin:16px auto 0;
  padding:12px 14px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  border:1px solid rgba(219,234,245,.84);
  border-radius:28px;
  background:rgba(255,255,255,.78);
  backdrop-filter:blur(20px);
  position:sticky;
  top:14px;
  z-index:100;
  box-shadow:0 18px 55px rgba(23,64,101,.10);
}
.brand{display:flex;align-items:center;gap:12px;min-width:max-content}
.brand-mark{width:50px;height:50px;border-radius:18px;display:grid;place-items:center;background:linear-gradient(135deg,var(--deep),var(--blue),var(--cyan));color:white;font-weight:950;font-size:24px;box-shadow:0 14px 34px rgba(70,184,255,.34)}
.brand strong{display:block;font-size:19px;line-height:1.05;letter-spacing:.04em}
.brand em{display:block;font-style:normal;margin-top:4px;color:#6b7c91;font-size:12px;white-space:nowrap}
.menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:999px;width:48px;height:42px;align-items:center;justify-content:center;flex-direction:column;gap:4px}
.menu-btn span{width:18px;height:2px;background:var(--deep);border-radius:999px;display:block}
.main-nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap;justify-content:flex-end}
.main-nav a,.main-nav button{border:0;background:transparent;color:#152b42;padding:10px 12px;border-radius:999px;font-weight:800;font-size:14px;white-space:nowrap}
.main-nav a:hover{background:#edfaff;color:#0369a1}
.main-nav button{background:linear-gradient(135deg,var(--deep),#0c7db7);color:white;box-shadow:0 12px 26px rgba(70,184,255,.25)}
.hero{width:min(var(--container),calc(100% - 32px));margin:28px auto 28px;min-height:760px;border-radius:46px;overflow:hidden;position:relative;display:grid;grid-template-columns:1.02fr .98fr;isolation:isolate;border:1px solid rgba(187,226,248,.9);box-shadow:var(--shadow);background:linear-gradient(135deg,#092033,#0d4262 48%,#dff9ff)}
.hero-bg{position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,21,37,.92),rgba(8,47,73,.78) 45%,rgba(228,249,255,.15)),url('../images/citadelle-hero-bg.webp') center/cover no-repeat;z-index:-3}
.hero-glow{position:absolute;border-radius:999px;filter:blur(6px);opacity:.72;z-index:-2;pointer-events:none}
.glow-a{width:360px;height:360px;right:8%;top:5%;background:radial-gradient(circle,rgba(85,224,244,.65),transparent 68%);animation:floatGlow 8s ease-in-out infinite}
.glow-b{width:280px;height:280px;right:33%;bottom:8%;background:radial-gradient(circle,rgba(140,124,255,.45),transparent 66%);animation:floatGlow 10s ease-in-out infinite reverse}
@keyframes floatGlow{0%,100%{transform:translateY(0) scale(1)}50%{transform:translateY(18px) scale(1.05)}}
.hero-copy,.hero-showcase{position:relative;z-index:2}
.hero-copy{padding:64px 58px;display:flex;flex-direction:column;justify-content:center;min-width:0}
.breadcrumb{display:flex;align-items:center;gap:9px;flex-wrap:wrap;font-size:13px;color:#dff9ff;margin-bottom:24px;font-weight:800}
.breadcrumb a{color:#e8fbff}.breadcrumb strong{color:white}
.eyebrow{margin:0 0 12px;color:#0ea5e9;font-weight:950;letter-spacing:.14em;font-size:12px;text-transform:uppercase}
.hero .eyebrow{color:#aef3ff}
.hero h1{margin:0 0 20px;color:#fff;font-size:clamp(44px,6vw,88px);line-height:.98;letter-spacing:-.06em;max-width:820px;text-shadow:0 22px 55px rgba(0,0,0,.22)}
.lead{display:block;color:#dff7ff;font-size:18px;line-height:1.95;max-width:760px;margin:0}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.button,.card-link,.table-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;border:0;border-radius:999px;padding:13px 20px;font-weight:950;transition:.25s ease;white-space:nowrap}
.button:hover,.card-link:hover,.table-btn:hover{transform:translateY(-2px)}
.primary{background:linear-gradient(135deg,#07162a,#0f8dd4,#53e0f3);color:white;box-shadow:0 18px 40px rgba(70,184,255,.30)}
.ghost{background:linear-gradient(135deg,#dffbff,#f4f6ff);color:#063a52;box-shadow:0 18px 40px rgba(85,224,244,.18)}
.pale{background:#ffffff;color:#0b5e8e;border:1px solid rgba(207,238,250,.9)}
.line{background:transparent;color:white;border:1px solid rgba(255,255,255,.45)}
.hero-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:34px;max-width:680px}
.hero-metrics article{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.20);border-radius:22px;padding:18px;backdrop-filter:blur(12px)}
.hero-metrics strong{display:block;color:white;font-size:28px}.hero-metrics span{color:#dff7ff;font-size:13px;font-weight:800}
.hero-showcase{display:flex;align-items:center;justify-content:center;padding:54px 44px}
.slider-shell{width:100%;min-height:620px;border-radius:36px;position:relative;overflow:hidden;border:1px solid rgba(255,255,255,.42);background:linear-gradient(155deg,rgba(255,255,255,.92),rgba(226,249,255,.76));box-shadow:0 32px 90px rgba(7,22,42,.22);backdrop-filter:blur(20px)}
.slide{position:absolute;inset:0;display:grid;grid-template-rows:auto 1fr;align-items:end;padding:38px;opacity:0;transform:scale(1.03) translateX(18px);transition:opacity .65s ease,transform .65s ease;pointer-events:none}
.slide.active{opacity:1;transform:scale(1) translateX(0);pointer-events:auto}
.slide div{position:relative;z-index:2;align-self:start}.slide span{display:inline-flex;padding:8px 13px;border-radius:999px;background:rgba(14,165,233,.12);color:#0369a1;font-weight:950;font-size:12px}.slide h2{font-size:clamp(32px,4vw,58px);line-height:1;margin:14px 0 12px;letter-spacing:-.05em}.slide p{color:#4f6278;line-height:1.8;margin:0;max-width:430px;font-weight:700}.slide img{position:absolute;right:-3%;bottom:2%;width:min(72%,520px);filter:drop-shadow(0 32px 55px rgba(15,23,42,.22));animation:deviceFloat 5.5s ease-in-out infinite}
@keyframes deviceFloat{0%,100%{transform:translateY(0) rotate(-1deg)}50%{transform:translateY(-16px) rotate(1deg)}}
.slider-dots{position:absolute;left:38px;bottom:32px;display:flex;gap:9px;z-index:4}.slider-dots button{width:38px;height:9px;border-radius:999px;border:0;background:#c5dceb}.slider-dots button.active{background:linear-gradient(90deg,var(--blue),var(--cyan));width:56px}
.quick-anchors{width:min(var(--container),calc(100% - 32px));margin:0 auto 44px;display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.quick-anchors a,.quick-anchors button{border:1px solid var(--line);border-radius:26px;background:rgba(255,255,255,.82);padding:20px;text-align:left;box-shadow:0 16px 38px rgba(24,77,115,.08);transition:.25s}.quick-anchors a:hover,.quick-anchors button:hover{transform:translateY(-4px);box-shadow:var(--shadow2)}.quick-anchors b{display:block;font-size:18px;margin-bottom:8px}.quick-anchors span{display:block;color:var(--muted);font-size:13px;font-weight:800}.quick-anchors button{width:100%;color:inherit}
.section{width:min(var(--container),calc(100% - 32px));margin:52px auto;padding:42px 0}.section.compact{margin-top:34px}.section-head{max-width:900px;margin:0 0 26px}.section-head.center{text-align:center;margin-left:auto;margin-right:auto}.section-head h2{font-size:clamp(34px,4vw,60px);line-height:1.04;margin:0 0 16px;letter-spacing:-.05em}.section-head p{color:var(--muted);font-size:17px;line-height:1.9;margin:0}.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.service-card,.official-card,.check-card,.support-card,.tutorial-card,.article-card,.faq-item,.flow-line article{background:rgba(255,255,255,.86);border:1px solid var(--line);border-radius:30px;padding:26px;box-shadow:0 18px 48px rgba(23,64,101,.08)}.service-card{min-height:340px;display:flex;flex-direction:column}.service-card span{width:46px;height:46px;border-radius:16px;display:grid;place-items:center;background:#e5fbff;color:#0b7aa8;font-weight:950}.service-card h3,.official-card h3,.check-card h3,.support-card h3,.tutorial-card h3,.article-card h3{font-size:22px;margin:18px 0 12px}.service-card p,.official-card p,.check-card p,.support-card p,.tutorial-card p,.article-card p,.verify-list p,.product-copy p,.product-copy li,.flow-line p{color:var(--muted);line-height:1.85}.card-link{margin-top:auto;color:#064b72;background:#effbff;border:1px solid #cfeefa;width:max-content}.flow-line{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.flow-line article b{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,var(--blue),var(--cyan));color:white}.flow-line h3{margin:14px 0 8px}.product-grid{display:grid;gap:22px}.product-card{display:grid;grid-template-columns:.48fr .52fr;gap:26px;align-items:center;border:1px solid var(--line);border-radius:36px;padding:26px;background:linear-gradient(135deg,#fff,#f3fcff);box-shadow:var(--shadow)}.product-card:nth-child(even){grid-template-columns:.52fr .48fr}.product-card:nth-child(even) .product-art{order:2}.product-art{display:grid;place-items:center;min-height:360px;border-radius:30px;background:radial-gradient(circle at 50% 35%,rgba(85,224,244,.34),transparent 46%),linear-gradient(145deg,#eafaff,#ffffff);border:1px solid #d6edf7}.product-art img{max-height:330px;object-fit:contain;filter:drop-shadow(0 30px 48px rgba(15,23,42,.18))}.product-copy small{display:inline-flex;padding:8px 13px;border-radius:999px;background:#e8fbff;color:#036b95;font-weight:950}.product-copy h3{font-size:clamp(30px,4vw,50px);margin:16px 0 12px;letter-spacing:-.04em}.product-copy ul{padding-left:20px;margin:16px 0 24px}.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:30px;box-shadow:var(--shadow)}table{width:100%;border-collapse:collapse;min-width:950px}th,td{text-align:left;padding:20px;border-bottom:1px solid #eaf2f8;vertical-align:top;line-height:1.75}th{color:#062338;background:#f4fcff;font-weight:950}td{color:#56697f}.table-btn{min-height:38px;padding:9px 16px;background:#e8fbff;color:#075985}.official-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.official-card{display:flex;flex-direction:column;gap:12px}.official-card .url{font-weight:950;color:#0385bd;background:#ecfbff;border-radius:16px;padding:10px 14px}.official-card .button{width:max-content;margin-top:auto}.check-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.check-card b{display:inline-flex;padding:8px 12px;border-radius:999px;background:#edfaff;color:#0369a1}.split{display:grid;grid-template-columns:.44fr .56fr;gap:24px;align-items:center}.split-copy{background:linear-gradient(135deg,#07162a,#0d4f78);border-radius:36px;padding:42px;color:white;box-shadow:var(--shadow)}.split-copy .eyebrow{color:#aef3ff}.split-copy p:not(.eyebrow){color:#dff7ff;line-height:1.95}.split-copy h2{font-size:clamp(34px,4vw,56px);line-height:1.05;margin:0 0 18px}.verify-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.verify-list article{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:0 16px 42px rgba(23,64,101,.08)}.verify-list span{font-weight:950;color:#0596c7}.download-panel{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;border-radius:36px;padding:36px;background:linear-gradient(135deg,#e9fbff,#ffffff 56%,#eef0ff);border:1px solid var(--line);box-shadow:var(--shadow)}.download-panel h2{font-size:clamp(32px,4vw,56px);line-height:1.05;margin:0 0 14px}.download-panel p:not(.eyebrow){color:var(--muted);line-height:1.9}.download-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}.download-actions .line{color:#075985;border-color:#bae6fd}.tutorial-grid,.support-grid,.article-grid,.faq-grid{display:grid;gap:16px;margin-top:18px}.tutorial-grid{grid-template-columns:repeat(4,1fr)}.support-grid{grid-template-columns:repeat(3,1fr)}.support-form{margin-top:20px;background:#fff;border:1px solid var(--line);border-radius:34px;padding:28px;box-shadow:var(--shadow)}.support-form h3{font-size:26px;margin:0 0 20px}.form-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.support-form label{display:flex;flex-direction:column;gap:8px;color:#20354b;font-weight:900}.support-form input,.support-form select,.support-form textarea{width:100%;border:1px solid #d8e8f1;border-radius:18px;background:#f8fdff;padding:13px 14px;color:#0a1d2c}.support-form .full{margin-top:14px}.support-form button{margin-top:18px}.article-grid{grid-template-columns:repeat(2,1fr)}.article-card{padding:30px}.article-card h3{font-size:25px}.article-card p{margin:10px 0}.faq-grid{grid-template-columns:repeat(2,1fr)}.faq-item{padding:0;overflow:hidden}.faq-item summary{padding:21px 24px;font-weight:950;cursor:pointer;list-style:none}.faq-item summary::-webkit-details-marker{display:none}.faq-item p{padding:0 24px 22px;margin:0;color:var(--muted);line-height:1.85}.contact-section{display:grid;grid-template-columns:1fr 360px;gap:22px;align-items:center;background:linear-gradient(135deg,#07162a,#0b456e);border-radius:38px;padding:42px;color:white;box-shadow:var(--shadow)}.contact-copy .eyebrow{color:#aef3ff}.contact-copy h2{font-size:clamp(34px,4vw,58px);line-height:1.05;margin:0 0 16px}.contact-copy p{color:#e1f8ff;line-height:1.9}.contact-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.qr-card{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);border-radius:30px;padding:18px;text-align:center}.qr-card img{border-radius:22px;background:white;aspect-ratio:1/1;object-fit:contain;width:100%}.qr-card p{color:#e1f8ff;font-weight:800}.site-footer{margin:70px 0 0;background:#061522;color:#dff7ff;padding:42px 0}.footer-grid{width:min(var(--container),calc(100% - 32px));margin:auto;display:grid;grid-template-columns:1fr 1fr;gap:28px}.footer-grid strong{font-size:24px;color:white}.footer-grid p{line-height:1.8;color:#a9c2d4}.footer-grid nav{display:grid;gap:10px;justify-items:end}.footer-grid a,.footer-contact{color:#dff7ff;border:0;background:transparent;text-align:right;font-weight:800}.contact-modal{position:fixed;inset:0;z-index:300;display:grid;place-items:center;padding:20px;opacity:0;pointer-events:none;transition:.25s}.contact-modal.open{opacity:1;pointer-events:auto}.modal-backdrop{position:absolute;inset:0;background:rgba(4,15,27,.62);backdrop-filter:blur(8px)}.modal-panel{position:relative;width:min(440px,calc(100vw - 34px));max-height:calc(100vh - 36px);overflow:auto;background:#fff;border-radius:30px;padding:26px;box-shadow:0 40px 110px rgba(0,0,0,.35);text-align:center}.modal-close{position:absolute;right:14px;top:12px;width:38px;height:38px;border-radius:50%;border:0;background:#f0f7fb;font-size:25px}.modal-tag{display:inline-flex;padding:7px 12px;background:#eafaff;color:#0369a1;border-radius:999px;font-weight:950;font-size:12px}.modal-panel h2{margin:14px 0 18px}.modal-qr{width:min(280px,70vw);margin:auto;background:#f7fbff;border-radius:24px;padding:12px;border:1px solid var(--line)}.modal-qr img{aspect-ratio:1/1;object-fit:contain;border-radius:18px}.modal-panel p{color:var(--muted);line-height:1.75}.modal-actions{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}.modal-actions a{border-radius:999px;background:#edfaff;color:#075985;padding:10px 16px;font-weight:950}.floating-service{position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom));z-index:120;width:62px;height:62px;border-radius:50%;border:0;background:linear-gradient(135deg,var(--blue),var(--cyan));color:white;font-weight:950;box-shadow:0 18px 38px rgba(70,184,255,.38)}.reveal{opacity:0;transform:translateY(22px);transition:opacity .75s ease,transform .75s ease}.reveal.in{opacity:1;transform:translateY(0)}
@media (max-width:1100px){.main-nav{position:absolute;left:0;right:0;top:76px;display:none;grid-template-columns:repeat(2,1fr);background:rgba(255,255,255,.96);border:1px solid var(--line);border-radius:24px;padding:14px;box-shadow:var(--shadow)}.main-nav.show{display:grid}.menu-btn{display:flex}.hero{grid-template-columns:1fr;min-height:auto}.hero-copy{padding:54px 38px}.hero-showcase{padding:0 28px 38px}.slider-shell{min-height:560px}.quick-anchors,.service-grid,.tutorial-grid{grid-template-columns:repeat(2,1fr)}.official-grid,.check-grid,.support-grid{grid-template-columns:repeat(2,1fr)}.flow-line{grid-template-columns:repeat(2,1fr)}.product-card,.product-card:nth-child(even){grid-template-columns:1fr}.product-card:nth-child(even) .product-art{order:0}.split,.download-panel,.contact-section{grid-template-columns:1fr}.form-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:720px){.site-header{width:calc(100% - 20px);top:10px;margin-top:10px;border-radius:22px}.brand-mark{width:44px;height:44px}.brand em{display:none}.hero{width:calc(100% - 20px);border-radius:30px;margin-top:18px}.hero-copy{padding:38px 22px}.breadcrumb{font-size:12px}.hero h1{font-size:42px;letter-spacing:-.055em}.lead{font-size:15px;line-height:1.8}.hero-actions,.contact-actions,.download-actions{display:grid;grid-template-columns:1fr;width:100%}.button,.card-link{width:100%}.hero-metrics{grid-template-columns:1fr}.hero-showcase{padding:0 14px 22px}.slider-shell{min-height:520px;border-radius:26px}.slide{padding:24px}.slide img{width:86%;right:-18%;bottom:18px}.slider-dots{left:24px;bottom:22px}.quick-anchors,.service-grid,.tutorial-grid,.official-grid,.check-grid,.support-grid,.article-grid,.faq-grid,.flow-line,.verify-list{grid-template-columns:1fr}.section{width:calc(100% - 20px);padding:28px 0;margin:28px auto}.section-head h2{font-size:34px}.service-card,.official-card,.check-card,.support-card,.tutorial-card,.article-card,.flow-line article{border-radius:24px;padding:22px}.product-card{padding:16px;border-radius:26px}.product-art{min-height:280px}.product-art img{max-height:250px}.product-copy h3{font-size:34px}.table-wrap{border-radius:22px}th,td{padding:14px;min-width:160px}.split-copy,.download-panel,.contact-section{border-radius:28px;padding:24px}.form-grid{grid-template-columns:1fr}.contact-section{width:calc(100% - 20px)}.qr-card{max-width:340px;margin:auto}.footer-grid{grid-template-columns:1fr}.footer-grid nav{justify-items:start}.footer-grid a,.footer-contact{text-align:left}.floating-service{right:12px;bottom:calc(12px + env(safe-area-inset-bottom));width:58px;height:58px}.modal-panel{border-radius:24px;padding:22px}.modal-qr{width:min(250px,72vw)}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}.reveal{opacity:1;transform:none}}