/* 310internet.com — v2 디자인 (Pretendard · 에디토리얼 · SVG 아이콘 · 실사 히어로) */
:root{
--navy:#0f1c46; --navy2:#18296b; --navy-deep:#0a1332;
--yellow:#ffc93c; --yellow-d:#eab308;
--ink:#191d2b; --body:#3d4356; --gray:#6b7186; --line:#e6e8ef; --line-d:#d5d9e4;
--bg:#f7f8fb; --white:#fff;
--r:12px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Pretendard Variable',Pretendard,-apple-system,'Apple SD Gothic Neo','Noto Sans KR','Malgun Gothic',sans-serif;color:var(--ink);background:var(--white);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;word-break:keep-all}
img{max-width:100%;height:auto}
svg{display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.skip{position:absolute;left:-9999px}
.skip:focus{position:fixed;top:8px;left:8px;background:var(--yellow);padding:8px 16px;z-index:99;border-radius:6px}

/* ───── header ───── */
.site-header{background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.hd{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--ink)}
.logo .mark{width:30px;height:30px;flex:none}
.logo .word{font-size:19px;font-weight:800;letter-spacing:-.4px}
.logo .word em{font-style:normal;color:var(--navy)}
.logo .word span{color:var(--gray);font-weight:600}
.main-nav{display:flex;gap:4px;font-size:15px}
.main-nav a{text-decoration:none;color:var(--body);padding:8px 13px;border-radius:8px;font-weight:500}
.main-nav a:hover{background:var(--bg)}
.main-nav a.active{color:var(--navy);font-weight:700;background:#eef1fa}
.call-btn{display:flex;align-items:center;gap:7px;background:var(--navy);color:#fff;font-weight:700;padding:10px 18px;border-radius:9px;text-decoration:none;font-size:14.5px;white-space:nowrap;letter-spacing:.2px}
.call-btn svg{width:15px;height:15px}
.call-btn:hover{background:var(--navy2)}
.nav-toggle{display:none;background:none;border:1px solid var(--line-d);border-radius:8px;padding:7px 10px;cursor:pointer}
.nav-toggle svg{width:18px;height:18px}
@media(max-width:960px){
.main-nav{display:none}
.nav-toggle{display:block}
body.nav-open .main-nav{display:flex;position:absolute;top:68px;left:0;right:0;background:var(--white);flex-direction:column;padding:12px 16px 18px;border-bottom:1px solid var(--line);gap:2px}
body.nav-open .main-nav a{padding:12px 14px}
}

/* ───── hero (실사 배경) ─────
/img/hero.jpg 를 넣으면 실사가 깔리고, 없으면 네이비 단색 그라데이션으로 표시됨 */
.hero{position:relative;color:#fff;padding:88px 0 96px;background:linear-gradient(115deg,var(--navy-deep) 0%,var(--navy2) 100%)}
.hero.photo{background:
linear-gradient(100deg,rgba(8,14,38,.94) 0%,rgba(10,19,50,.85) 42%,rgba(10,19,50,.5) 100%),
var(--hero-img) center 42%/cover no-repeat}
:root{
/* 히어로 배경: LA 스카이라인+야자수 (Unsplash, 무료 라이선스).
배포 후 자체 호스팅하려면 이미지를 /img/hero.jpg 로 저장하고 아래를 url('/img/hero.jpg') 로 교체 */
--hero-img:url('https://images.unsplash.com/photo-1570658379397-89d15db1b0de?w=2000&q=80&fm=jpg&auto=format');
}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
@media(max-width:920px){.hero-grid{grid-template-columns:1fr;gap:40px}.hero{padding:56px 0 64px}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:700;letter-spacing:.06em;color:var(--yellow);text-transform:uppercase;margin-bottom:18px}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--yellow)}
.hero h1{font-size:clamp(30px,4.3vw,46px);font-weight:800;line-height:1.28;letter-spacing:-1.2px}
.hero .yl{color:var(--yellow)}
.hero p.sub{margin-top:18px;font-size:16.5px;color:#cdd5ec;max-width:30em;font-weight:400}
.hero-checks{margin-top:26px;display:flex;flex-direction:column;gap:11px}
.hero-checks li{list-style:none;display:flex;gap:10px;align-items:flex-start;font-size:15px;color:#e6eafa}
.hero-checks svg{width:19px;height:19px;flex:none;margin-top:3px;color:var(--yellow)}
.hero-trust{margin-top:30px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);display:flex;gap:28px;flex-wrap:wrap}
.hero-trust .t b{display:block;font-size:20px;font-weight:800;letter-spacing:-.3px}
.hero-trust .t span{font-size:12.5px;color:#9aa6cd}

/* ───── form card ───── */
.card{background:var(--white);color:var(--ink);border-radius:14px;padding:30px 28px 26px;box-shadow:0 24px 60px rgba(5,10,30,.45)}
.card h2{font-size:20px;font-weight:800;letter-spacing:-.4px}
.card p.cap{font-size:13.5px;color:var(--gray);margin:6px 0 18px}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:480px){.f-row{grid-template-columns:1fr}}
label{display:block;font-size:13px;font-weight:600;margin:13px 0 6px;color:var(--body)}
label .req{color:#dc3d43}
input,select,textarea{width:100%;padding:11px 13px;border:1px solid var(--line-d);background:var(--white);border-radius:9px;font-size:15px;font-family:inherit;color:var(--ink);transition:border-color .15s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--navy);box-shadow:0 0 0 3px rgba(15,28,70,.08)}
input::placeholder{color:#a6abbd}
.consent{display:flex;gap:8px;align-items:flex-start;margin-top:15px;font-size:12.5px;color:var(--gray);line-height:1.55}
.consent input{width:auto;margin-top:3px}
.consent-error{color:#dc3d43}
.submit{width:100%;margin-top:18px;background:var(--yellow);color:var(--navy-deep);font-weight:800;font-size:16px;border:none;border-radius:10px;padding:15px;cursor:pointer;letter-spacing:-.2px;transition:background .15s}
.submit:hover{background:var(--yellow-d)}
.card p.tiny{font-size:12px;color:#a0a5b8;text-align:center;margin-top:11px}

/* ───── sections (좌측 정렬 에디토리얼) ───── */
section{padding:76px 0}
section.alt{background:var(--bg)}
.sec-head{max-width:640px;margin-bottom:44px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-eyebrow{font-size:13px;font-weight:700;letter-spacing:.08em;color:var(--yellow-d);text-transform:uppercase;margin-bottom:10px}
.sec-title{font-size:clamp(23px,2.9vw,31px);font-weight:800;letter-spacing:-.8px;line-height:1.35}
.sec-sub{color:var(--gray);margin-top:12px;font-size:15.5px}

/* cards */
.cols3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cols2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:820px){.cols3,.cols2{grid-template-columns:1fr}}
.p-card{background:var(--white);border:1px solid var(--line);border-radius:var(--r);padding:26px 24px;transition:border-color .15s,box-shadow .15s}
.p-card:hover{border-color:var(--line-d);box-shadow:0 6px 20px rgba(15,28,70,.06)}
section.alt .p-card{border-color:transparent;box-shadow:0 1px 3px rgba(15,28,70,.05)}
.icon-tile{width:42px;height:42px;border-radius:10px;background:#eef1fa;color:var(--navy);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.icon-tile svg{width:21px;height:21px}
.device-photo{width:100%;height:160px;border-radius:10px;background:#f3f5fa;margin-bottom:16px;overflow:hidden;position:relative}
.device-photo img{display:block;width:100%;height:100%;object-fit:cover;object-position:center}
.p-card h3{font-size:16.5px;margin:0 0 7px;font-weight:700;letter-spacing:-.3px}
.p-card p{font-size:14.5px;color:var(--gray)}
.p-card a.more{font-size:14px;font-weight:700;color:var(--navy);text-decoration:none;display:inline-flex;align-items:center;gap:5px;margin-top:14px}
.p-card a.more svg{width:14px;height:14px;transition:transform .15s}
.p-card a.more:hover svg{transform:translateX(3px)}

/* steps — 넘버 라인형 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;background:var(--white)}
@media(max-width:820px){.steps{grid-template-columns:1fr}}
.step{padding:30px 26px;border-right:1px solid var(--line)}
.step:last-child{border-right:none}
@media(max-width:820px){.step{border-right:none;border-bottom:1px solid var(--line)}.step:last-child{border-bottom:none}}
.step .num{font-size:13px;font-weight:800;color:var(--yellow-d);letter-spacing:.08em;margin-bottom:12px}
.step h3{font-size:17px;font-weight:700;margin-bottom:8px;letter-spacing:-.3px}
.step p{font-size:14.5px;color:var(--gray)}
.step .hl{background:#fff8e3;border-radius:8px;padding:10px 13px;font-size:13.5px;margin-top:14px;color:#7a5c00}

/* offer — 실무형 표기 */
.offer{background:var(--navy-deep);border-radius:16px;color:#fff;padding:44px 40px}
@media(max-width:720px){.offer{padding:34px 24px}}
.offer .sec-eyebrow{color:var(--yellow)}
.offer h2{font-size:clamp(21px,2.7vw,28px);font-weight:800;letter-spacing:-.6px;line-height:1.4}
.offer .yl{color:var(--yellow)}
.offer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:30px}
@media(max-width:720px){.offer-grid{grid-template-columns:1fr}}
.offer-item{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13);border-radius:12px;padding:22px 20px}
.offer-item .big{font-size:19px;font-weight:800;color:var(--yellow);letter-spacing:-.3px}
.offer-item p{font-size:13.5px;color:#b8c1de;margin-top:7px}
.offer .note{font-size:12.5px;color:#8b96bd;margin-top:22px}

/* timeline */
.tl{max-width:720px;position:relative;padding-left:36px}
.tl::before{content:"";position:absolute;left:8px;top:8px;bottom:8px;width:2px;background:var(--line-d)}
.tl-item{position:relative;padding-bottom:32px}
.tl-item:last-child{padding-bottom:0}
.tl-item::before{content:"";position:absolute;left:-33px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--navy);outline:3px solid #dfe5f6}
.tl-item .when{font-size:12.5px;font-weight:700;color:var(--navy);background:#eef1fa;display:inline-block;border-radius:6px;padding:3px 10px;letter-spacing:.02em}
.tl-item h3{font-size:16.5px;font-weight:700;margin:9px 0 4px;letter-spacing:-.3px}
.tl-item p{font-size:14.5px;color:var(--gray)}

/* faq */
.faq{max-width:760px}
.q{background:var(--white);border:1px solid var(--line);border-radius:10px;padding:19px 22px;margin-bottom:10px}
.q h3{font-size:15.5px;font-weight:700;color:var(--navy);letter-spacing:-.2px}
.q p{font-size:14.5px;color:var(--gray);margin-top:6px}

/* article */
.article{max-width:740px;margin:0 auto;padding:56px 24px}
.article h1{font-size:clamp(25px,3.2vw,34px);font-weight:800;letter-spacing:-.8px;line-height:1.35}
.article .meta{color:var(--gray);font-size:14px;margin:10px 0 32px}
.article h2{font-size:21px;font-weight:800;margin:40px 0 12px;letter-spacing:-.4px}
.article h3{font-size:17.5px;font-weight:700;margin:28px 0 8px}
.article p{margin:12px 0;color:var(--body)}
.article ul,.article ol{margin:12px 0 12px 22px;color:var(--body)}
.article li{margin:6px 0}
.article .tip{background:#fff8e3;border-left:3px solid var(--yellow);border-radius:0 8px 8px 0;padding:14px 18px;margin:20px 0;font-size:14.5px}
.article .script{background:var(--navy-deep);color:#dfe5f6;border-radius:10px;padding:18px 22px;margin:16px 0;font-size:15px}
.article .script b{color:var(--yellow)}
.article .script .kr{color:#8b96bd;font-size:13.5px;margin-top:6px;display:block}
.article table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px}
.article th,.article td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
.article th{background:var(--bg)}
.table-scroll{overflow-x:auto}

/* CTA end */
.cta-end{background:var(--navy-deep);color:#fff;padding:68px 24px}
.cta-inner{max-width:1120px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap}
.cta-inner h2{font-size:clamp(21px,2.7vw,28px);font-weight:800;letter-spacing:-.6px;line-height:1.4}
.cta-inner p{color:#9aa6cd;margin-top:8px;font-size:15px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.btn-y{background:var(--yellow);color:var(--navy-deep);font-weight:800;padding:14px 26px;border-radius:10px;text-decoration:none;font-size:15px}
.btn-y:hover{background:var(--yellow-d)}
.btn-o{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.35);font-weight:700;padding:13px 24px;border-radius:10px;text-decoration:none;font-size:15px}
.btn-o:hover{border-color:rgba(255,255,255,.7)}

/* footer */
.site-footer{background:#0a0f24;color:#8890ab;font-size:14px;padding:52px 0 0}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:38px}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr}}
.site-footer h3{color:#c3c9de;font-size:13.5px;margin-bottom:13px;font-weight:700;letter-spacing:.02em}
.site-footer a{display:block;color:#8890ab;text-decoration:none;margin:8px 0}
.site-footer a:hover{color:var(--yellow)}
.foot-logo{display:flex;align-items:center;gap:9px;margin-bottom:14px}
.foot-logo .word{font-size:18px;font-weight:800;color:#fff;letter-spacing:-.4px}
.small{font-size:12.5px}
.foot-legal{text-align:center;padding-bottom:18px;font-size:12.5px}
.foot-legal a{display:inline;color:#8890ab;text-decoration:none;margin:0 4px}
.foot-legal a:hover{color:var(--yellow)}
.foot-legal .dot{color:#3a4262;margin:0 2px}
.foot-bottom{border-top:1px solid #1a2140;text-align:center;padding:18px;font-size:12.5px;color:#5d6580}

/* kakao float */
.kakao-float{position:fixed;right:22px;bottom:22px;display:flex;align-items:center;gap:8px;background:#fee500;color:#191919;font-weight:700;padding:13px 20px;border-radius:12px;box-shadow:0 10px 28px rgba(0,0,0,.22);font-size:14.5px;z-index:20;text-decoration:none}
.kakao-float svg{width:18px;height:18px}

/* carrier 텍스트 배지 (로고 사용 금지) */
.carrier{display:inline-block;font-weight:700;font-size:12.5px;border-radius:6px;padding:2px 9px;border:1px solid}
.carrier.spectrum{color:#0055a5;border-color:#b5d2ec;background:#f2f8fd}
.carrier.att{color:#0a7ab8;border-color:#b3ddf1;background:#f0f9fe}
.carrier.frontier{color:#c8102e;border-color:#f0bcc5;background:#fdf3f5}
.carrier.tmobile{color:#e20074;border-color:#f5b8d9;background:#fef2f9}