/* SiFlow · public site (home + blog) */
:root { --ink: #14162B; --ink2: #1E2140; --bg: #FFFFFF; --soft: #F5F6FA; --line: #E6E8F0; --tx: #14162B; --tx2: #4A4F6A; --mute: #7A7F99; --pri: #3B5BFD; --pri2: #2E49DB; --acc: #FF8A3D; --ok: #12A150; --fh: 'Sora', system-ui, sans-serif; --f: 'Plus Jakarta Sans', system-ui, sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.6 var(--f); color: var(--tx); background: var(--bg); }
a { color: var(--pri); text-decoration: none; }
h1, h2, h3 { font-family: var(--fh); letter-spacing: -.025em; line-height: 1.12; margin: 0 0 .4em; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 0 24px; } .wrap.narrow { max-width: 760px; }
.center { text-align: center; } .muted { color: var(--mute); } .small { font-size: 13px; color: var(--mute); padding-top: 18px; padding-bottom: 28px; }
.logo { width: 34px; height: 34px; border-radius: 10px; display: inline-grid; place-items: center; font: 800 18px var(--fh); color: #fff; background: linear-gradient(135deg, var(--pri) 0%, #6A7CFF 55%, var(--acc) 130%); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--tx); } .brand b { font: 700 20px var(--fh); letter-spacing: -.02em; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 18px; border-radius: 999px; background: var(--pri); color: #fff; font-weight: 700; font-size: 14.5px; border: 1px solid transparent; transition: background .15s, transform .1s; white-space: nowrap; }
.btn:hover { background: var(--pri2); } .btn.ghost { background: transparent; color: var(--tx); border-color: #D7DAE6; } .btn.ghost:hover { background: var(--soft); }
.btn.lg { padding: 15px 26px; font-size: 16px; } .btn.block { width: 100%; }
.nav { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.88); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.nav .wrap { display: flex; align-items: center; gap: 14px; height: 68px; } .nav nav { display: flex; gap: 26px; margin: 0 auto; } .nav nav a { color: var(--tx2); font-weight: 600; font-size: 14.5px; } .nav nav a:hover { color: var(--tx); }
.kicker { display: inline-block; font-size: 12.5px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--acc); margin-bottom: 14px; }
.hero { padding: 72px 0 40px; background: radial-gradient(60% 60% at 90% 10%, rgba(59,91,253,.10), transparent 70%), radial-gradient(40% 50% at 0% 100%, rgba(255,138,61,.10), transparent 70%); overflow: hidden; }
.hero .wrap { display: grid; grid-template-columns: 1fr; gap: 48px; }
.hero-t { max-width: 820px; margin: 0 auto; text-align: center; }
.hero h1 { font-size: clamp(38px, 6vw, 66px); font-weight: 800; } .hero h1 em { font-style: normal; background: linear-gradient(90deg, var(--pri), #8A5CFF 60%, var(--acc)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.sub { font-size: 19px; color: var(--tx2); max-width: 680px; margin: 0 auto 28px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.fine { font-size: 13.5px; color: var(--mute); margin-top: 14px; }
.hero-shot { position: relative; max-width: 1080px; margin: 0 auto; width: 100%; }
.hero-shot img { width: 100%; height: auto; display: block; border-radius: 18px; border: 1px solid var(--line); box-shadow: 0 30px 80px rgba(20,22,43,.18), 0 4px 14px rgba(20,22,43,.06); }
.hero-shot .phone { position: absolute; right: -24px; bottom: -36px; width: 22%; border-radius: 26px; border: 6px solid var(--ink); box-shadow: 0 24px 60px rgba(20,22,43,.35); }
.strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 22px 0; margin-top: 40px; } .strip .wrap { display: flex; flex-wrap: wrap; gap: 12px 32px; align-items: center; justify-content: center; color: var(--mute); font-size: 14.5px; } .strip span { font-weight: 700; text-transform: uppercase; letter-spacing: .08em; font-size: 12px; } .strip b { color: var(--tx2); font-weight: 600; text-decoration: line-through; text-decoration-color: rgba(229,72,77,.6); }
.sec { padding: 88px 0; } .sec h2 { font-size: clamp(30px, 4vw, 44px); text-align: center; margin-bottom: 40px; } .sec h2 span { color: var(--mute); }
.sec.soft { background: var(--soft); } .sec.soft h2 { margin-bottom: 10px; }
.feat { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.fc { padding: 26px; border: 1px solid var(--line); border-radius: 18px; background: #fff; transition: border-color .15s, transform .15s, box-shadow .15s; } .fc:hover { border-color: var(--pri); transform: translateY(-2px); box-shadow: 0 14px 34px rgba(20,22,43,.08); }
.fc i { font-style: normal; width: 46px; height: 46px; display: grid; place-items: center; font-size: 22px; border-radius: 13px; background: #EEF1FF; color: var(--pri); margin-bottom: 14px; font-weight: 700; } .fc h3 { font-size: 18px; margin-bottom: 6px; } .fc p { margin: 0; color: var(--tx2); font-size: 15px; }
.sec.dark { background: radial-gradient(70% 90% at 100% 0%, rgba(59,91,253,.4), transparent 60%), radial-gradient(60% 80% at 0% 100%, rgba(255,138,61,.22), transparent 60%), var(--ink); color: #fff; }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; } .dark h2 { text-align: left; margin-bottom: 14px; } .dark p { color: #C4C8EC; font-size: 17px; }
.ticks { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; } .ticks li { padding: 16px 18px 16px 52px; border-radius: 14px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); position: relative; color: #D5D8F2; } .ticks li::before { content: '✓'; position: absolute; left: 18px; top: 15px; width: 22px; height: 22px; border-radius: 50%; background: var(--ok); color: #fff; display: grid; place-items: center; font-size: 12px; font-weight: 800; } .ticks b { color: #fff; }
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
.plan { border: 1px solid var(--line); border-radius: 22px; padding: 30px; display: flex; flex-direction: column; gap: 10px; position: relative; background: #fff; } .plan > b { font: 700 20px var(--fh); }
.plan.hot { border: 2px solid var(--pri); box-shadow: 0 24px 60px rgba(59,91,253,.18); } .plan .tag { position: absolute; top: -13px; left: 30px; background: var(--pri); color: #fff; font-size: 12px; font-weight: 700; padding: 3px 12px; border-radius: 99px; }
.price { font: 800 40px var(--fh); letter-spacing: -.03em; } .price small { font: 500 15px var(--f); color: var(--mute); }
.plan ul { list-style: none; padding: 0; margin: 6px 0 18px; display: grid; gap: 10px; flex: 1; color: var(--tx2); } .plan li::before { content: '✓'; color: var(--ok); font-weight: 800; margin-right: 10px; }
.deals { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 30px; }
.deal { display: flex; gap: 14px; align-items: center; padding: 18px; background: #fff; border: 1px solid var(--line); border-radius: 16px; color: var(--tx); } .deal:hover { border-color: var(--acc); } .deal small { display: block; color: var(--mute); font-size: 13.5px; }
.dl { width: 46px; height: 46px; border-radius: 12px; background: var(--ink); color: #fff; display: grid; place-items: center; font: 700 15px var(--fh); flex: none; }
.posts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 30px; }
.post { display: flex; flex-direction: column; gap: 8px; padding: 24px; border: 1px solid var(--line); border-radius: 18px; color: var(--tx); background: #fff; transition: .15s; } .post:hover { border-color: var(--pri); transform: translateY(-2px); } .post b { font: 700 19px/1.3 var(--fh); } .post span { color: var(--tx2); font-size: 15px; flex: 1; } .post small { color: var(--mute); }
details { background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 4px 20px; margin-bottom: 10px; } summary { cursor: pointer; font-weight: 700; padding: 14px 0; list-style: none; position: relative; padding-right: 30px; } summary::after { content: '+'; position: absolute; right: 0; top: 10px; font-size: 22px; color: var(--pri); } details[open] summary::after { content: '−'; } details p { margin: 0 0 16px; color: var(--tx2); }
.final { background: linear-gradient(180deg, #fff, #EEF1FF); } .final h2 { margin-bottom: 14px; }
.foot { background: var(--ink); color: #A9ADD2; padding-top: 56px; } .foot .wrap:first-child { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; } .foot .brand { color: #fff; } .foot b { display: block; color: #fff; margin-bottom: 10px; } .foot a:not(.brand) { display: block; color: #A9ADD2; padding: 3px 0; font-size: 14.5px; } .foot a:hover { color: #fff; } .foot .small { border-top: 1px solid #2A2E55; margin-top: 40px; color: #7E83AE; }
.art h1 { font-size: clamp(32px, 5vw, 46px); margin-top: 12px; } .meta { color: var(--mute); } .back { font-weight: 600; font-size: 14px; }
.body { font-size: 18px; line-height: 1.75; color: #2B2F4A; } .body h2 { font-size: 28px; text-align: left; margin: 1.4em 0 .4em; } .body h3 { font-size: 21px; margin: 1.2em 0 .3em; } .body img { max-width: 100%; border-radius: 12px; } .body blockquote { border-left: 4px solid var(--acc); margin: 1em 0; padding: 4px 20px; color: var(--tx2); } .body .callout { background: #FFF1E6; border-radius: 12px; padding: 14px 18px; }
.cta-box { margin-top: 48px; padding: 28px; border-radius: 18px; background: var(--ink); color: #fff; text-align: center; } .cta-box p { color: #C4C8EC; }
.adbox { margin: 28px 0; text-align: center; } .adbox span { display: block; font-size: 11px; color: var(--mute); text-transform: uppercase; letter-spacing: .08em; margin-bottom: 4px; }
.pager a { margin: 0 12px; font-weight: 600; }
@media (max-width: 900px) {
  .nav nav { display: none; } .nav .btn.ghost { margin-left: auto; }
  .feat, .plans, .deals, .posts { grid-template-columns: 1fr; } .two { grid-template-columns: 1fr; gap: 28px; }
  .hero { padding-top: 44px; } .sub { font-size: 17px; } .hero-shot .phone { right: 4px; bottom: -24px; width: 30%; border-width: 4px; border-radius: 18px; }
  .sec { padding: 60px 0; } .foot .wrap:first-child { grid-template-columns: 1fr 1fr; }
  .wrap { padding: 0 16px; } .nav .btn { padding: 8px 14px; font-size: 13.5px; }
}