:root{
  --primary:rgb(70,139,223);
  --primary-deep:#1f5da8;
  --primary-soft:#eef6ff;
  --ink:#17243a;
  --muted:#62708a;
  --line:#dbe8f7;
  --card:#ffffff;
  --bg:#f7fbff;
  --shadow:0 18px 45px rgba(27,79,135,.10);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:linear-gradient(180deg,#f5faff 0%,#fff 36%,#f7fbff 100%);line-height:1.72;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1120px,calc(100% - 32px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.88);backdrop-filter:blur(18px);border-bottom:1px solid rgba(219,232,247,.9)}
.nav-shell{width:min(1180px,calc(100% - 28px));margin:0 auto;display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.2px}
.brand-logo{width:38px;height:38px;border-radius:12px;box-shadow:0 8px 20px rgba(70,139,223,.18)}
.brand-text{font-size:18px;color:#12345d}
.nav-check{display:none}
.nav-toggle{width:42px;height:42px;display:grid;place-content:center;gap:5px;border:1px solid var(--line);border-radius:14px;background:#fff}
.nav-toggle span{display:block;width:19px;height:2px;background:#23415f;border-radius:8px}
.site-nav{position:absolute;left:14px;right:14px;top:68px;display:none;grid-template-columns:1fr;gap:8px;padding:14px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}
.site-nav a{padding:10px 12px;border-radius:12px;color:#30445e;font-weight:650}
.site-nav a:hover{background:var(--primary-soft);color:var(--primary-deep)}
.nav-check:checked ~ .site-nav{display:grid}
.hero-section{padding:46px 0 36px;background:radial-gradient(circle at 18% 10%,rgba(70,139,223,.18),transparent 36%),linear-gradient(135deg,#f5fbff 0%,#fff 48%,#eef6ff 100%)}
.hero-layout{display:grid;gap:30px;align-items:center}
.eyebrow,.badge{display:inline-flex;align-items:center;gap:8px;width:max-content;max-width:100%;padding:6px 12px;border-radius:999px;background:rgba(70,139,223,.10);color:var(--primary-deep);font-weight:750;font-size:13px}
h1{font-size:clamp(30px,8vw,58px);line-height:1.12;margin:18px 0 16px;color:#10223b;letter-spacing:-1.4px}
h2{font-size:clamp(24px,5vw,36px);line-height:1.22;margin:0 0 12px;color:#10223b;letter-spacing:-.6px}
h3{margin:0 0 8px;color:#10223b;line-height:1.35}
p{margin:0 0 14px;color:var(--muted)}
.lead{font-size:17px;color:#44536c;max-width:670px}
.hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:22px}
.download-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 24px;border-radius:999px;background:var(--primary);color:#fff!important;font-weight:800;box-shadow:0 14px 28px rgba(70,139,223,.25);transition:transform .2s ease,box-shadow .2s ease,background .2s ease;cursor:pointer;border:0}
.download-btn:hover{transform:translateY(-2px);background:#3d7ed0;box-shadow:0 18px 34px rgba(70,139,223,.30)}
.secondary-link{display:inline-flex;align-items:center;min-height:46px;padding:0 18px;border:1px solid var(--line);border-radius:999px;background:#fff;color:#244465;font-weight:750}
.trust-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.trust-tags span{padding:7px 10px;background:#fff;border:1px solid var(--line);border-radius:999px;color:#3d516d;font-size:13px}
.hero-visual{position:relative;display:grid;place-items:center;min-height:420px}.phone-card{position:relative;width:min(320px,84vw);padding:16px;border-radius:34px;background:rgba(255,255,255,.74);border:1px solid rgba(219,232,247,.95);box-shadow:var(--shadow);backdrop-filter:blur(18px)}.phone-card img{border-radius:26px}.floating-card{position:absolute;display:grid;gap:4px;width:180px;padding:13px 14px;border-radius:18px;background:rgba(255,255,255,.92);border:1px solid var(--line);box-shadow:0 14px 36px rgba(37,86,139,.12)}.floating-card strong{font-size:13px;color:#153052}.floating-card span{font-size:12px;color:#6a7890}.card-top{top:14px;right:0}.card-mid{left:0;bottom:82px}.card-bottom{right:10px;bottom:18px}.status-dot{width:10px;height:10px;border-radius:50%;background:var(--primary);display:inline-block;margin-right:7px;box-shadow:0 0 0 6px rgba(70,139,223,.12)}
section{padding:52px 0}.section-head{display:flex;flex-direction:column;gap:8px;margin-bottom:24px}.section-head.center{text-align:center;align-items:center}.section-note{max-width:720px}.metric-strip{display:grid;gap:14px}.metric{padding:20px;border-radius:20px;background:#fff;border:1px solid var(--line);box-shadow:0 10px 28px rgba(36,82,130,.06)}.metric b{display:block;font-size:22px;color:var(--primary-deep);margin-bottom:4px}.metric span{font-size:14px;color:#65738c}.feature-grid,.category-grid,.scenario-grid,.recommend-grid,.faq-grid{display:grid;gap:16px}.feature-card,.category-card,.scenario-card,.recommend-card,.faq-item,.content-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 12px 32px rgba(36,82,130,.07)}.feature-card .icon,.category-card .icon{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:var(--primary-soft);color:var(--primary-deep);font-weight:900;margin-bottom:14px}.category-card{transition:transform .2s ease,border-color .2s ease}.category-card:hover{transform:translateY(-3px);border-color:rgba(70,139,223,.45)}.read-more{color:var(--primary-deep);font-weight:800;display:inline-flex;margin-top:8px}.path-steps{display:grid;gap:14px;counter-reset:step}.path-card{position:relative;padding:22px 20px 20px 62px;border-radius:22px;background:linear-gradient(180deg,#fff,#f8fbff);border:1px solid var(--line);box-shadow:0 10px 28px rgba(36,82,130,.06)}.path-card:before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:22px;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;background:var(--primary);color:#fff;font-weight:900}.security-layout,.split-layout{display:grid;gap:24px;align-items:center}.security-panel{padding:24px;border-radius:26px;background:linear-gradient(145deg,#ffffff,#eef6ff);border:1px solid var(--line);box-shadow:var(--shadow)}.security-row{display:flex;align-items:flex-start;gap:12px;padding:14px 0;border-bottom:1px solid var(--line)}.security-row:last-child{border-bottom:0}.security-row i{width:24px;height:24px;min-width:24px;border-radius:9px;background:var(--primary);color:#fff;display:grid;place-items:center;font-style:normal;font-size:13px;font-weight:900}.process-grid{display:grid;gap:14px}.process-item{padding:18px;border-left:4px solid var(--primary);border-radius:18px;background:#fff;border-top:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.cta-section{padding:58px 0}.cta-box{text-align:center;padding:34px 22px;border-radius:30px;background:linear-gradient(135deg,rgba(70,139,223,.12),rgba(255,255,255,.96));border:1px solid var(--line);box-shadow:var(--shadow)}.page-hero{padding:46px 0 32px;background:linear-gradient(135deg,#f1f8ff,#fff)}.page-layout{display:grid;gap:22px}.article{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;box-shadow:var(--shadow)}.article h1{font-size:clamp(29px,7vw,46px)}.article h2{font-size:23px;margin-top:28px}.info-list{display:grid;gap:12px;margin:16px 0}.info-list li{list-style:none;padding:14px 16px;border-radius:16px;background:#f7fbff;border:1px solid var(--line);color:#4a5d76}.tips-panel{padding:20px;border-radius:22px;background:linear-gradient(180deg,#eef6ff,#fff);border:1px solid var(--line)}.tips-panel ul{margin:12px 0 0;padding-left:20px;color:#4d5f78}.steps-list{display:grid;gap:12px;margin:18px 0}.steps-list div{padding:16px 18px;background:#fff;border:1px solid var(--line);border-radius:18px;box-shadow:0 8px 20px rgba(36,82,130,.05)}.steps-list b{color:var(--primary-deep)}.only-download{margin-top:22px}.download-card{max-width:760px;margin:0 auto;text-align:center}.faq-item summary{font-weight:850;color:#10223b;cursor:pointer}.faq-item p{margin-top:10px}.site-footer{background:#10233e;color:#dce8f6;margin-top:36px}.site-footer p,.site-footer a{color:#b9c9dc}.footer-grid{display:grid;gap:22px;padding:38px 0}.footer-grid h3{color:#fff;font-size:16px}.footer-grid a{display:block;margin:8px 0}.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:850;margin-bottom:12px}.footer-brand img{width:34px;height:34px;border-radius:10px}.footer-bottom{text-align:center;padding:18px;border-top:1px solid rgba(255,255,255,.12);color:#9fb2c9;font-size:13px}.mini-table{display:grid;gap:10px;margin-top:14px}.mini-table div{display:flex;justify-content:space-between;gap:14px;padding:12px 14px;border-radius:14px;background:#f7fbff;border:1px solid var(--line)}.tag-row{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}.tag-row span{font-size:13px;padding:6px 10px;border-radius:999px;background:#eef6ff;color:#235f9f;font-weight:700}.notice{padding:16px 18px;border-radius:18px;background:#fff8ea;border:1px solid #f2dfb8;color:#765820;margin:18px 0}.notice p{color:#765820;margin:0}.two-col-list{display:grid;gap:14px}.two-col-list .content-card{box-shadow:none}.download-guide-card{padding:24px;border-radius:26px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
@media (min-width:640px){.metric-strip{grid-template-columns:repeat(2,1fr)}.feature-grid,.category-grid,.scenario-grid,.recommend-grid,.faq-grid{grid-template-columns:repeat(2,1fr)}.process-grid{grid-template-columns:repeat(2,1fr)}.two-col-list{grid-template-columns:repeat(2,1fr)}}
@media (min-width:860px){.nav-toggle{display:none}.site-nav{position:static;display:flex;align-items:center;gap:4px;padding:0;background:transparent;border:0;box-shadow:none}.site-nav a{font-size:15px}.hero-section{padding:78px 0 56px}.hero-layout{grid-template-columns:1.05fr .95fr;gap:54px}.metric-strip{grid-template-columns:repeat(4,1fr)}.feature-grid,.category-grid,.scenario-grid,.recommend-grid{grid-template-columns:repeat(3,1fr)}.path-steps{grid-template-columns:repeat(3,1fr)}.security-layout,.split-layout,.page-layout{grid-template-columns:1.05fr .95fr}.process-grid{grid-template-columns:repeat(3,1fr)}.footer-grid{grid-template-columns:1.4fr .8fr .8fr .8fr}.article{padding:34px}.page-hero{padding:70px 0 44px}}
@media (min-width:1100px){.category-grid.wide{grid-template-columns:repeat(4,1fr)}.hero-visual{min-height:500px}.phone-card{width:350px}.card-top{right:18px}.card-mid{left:4px}.card-bottom{right:42px}}
@media (max-width:420px){.container{width:min(100% - 24px,1120px)}.floating-card{position:relative;inset:auto!important;width:100%;margin-top:10px}.hero-visual{min-height:auto}.phone-card{width:100%}.hero-actions .download-btn,.hero-actions .secondary-link{width:100%}.download-btn{width:100%;padding:0 18px}.article{padding:20px}.mini-table div{display:block}.mini-table strong{display:block;margin-bottom:4px}}