/*
 * 공식홈 소개 페이지 (/page/about) — 어두운 남색 바탕 + 하늘색 강조
 * 사이트 라이트·다크 모드와 관계없이 늘 같은 어두운 화면이다. 모든 선택자는 .bfl 안에서만 쓴다.
 */
.bfl {
    --l-bg: #060b14;
    --l-bg2: #0a1424;
    --l-card: rgba(18, 36, 62, .55);
    --l-line: rgba(120, 170, 230, .16);
    --l-line2: rgba(120, 170, 230, .28);
    --l-ink: #eef4fc;
    --l-ink2: #b4c3d8;
    --l-muted: #7d8ea8;
    --l-sky: #4ea8ef;
    --l-sky2: #8fd0ff;
    --l-mint: #5ee0c0;
    --l-coral: #ff8f7a;
    --l-w: 1120px;
    position: relative;
    overflow: hidden;
    background: var(--l-bg);
    color: var(--l-ink);
    font-family: var(--bf-font, inherit);
    line-height: 1.6;
    word-break: keep-all;
}
.bfl *, .bfl *::before, .bfl *::after { box-sizing: border-box; }
.bfl a { color: inherit; text-decoration: none; }
.bfl img { display: block; max-width: 100%; height: auto; }
.bfl h1, .bfl h2, .bfl h3, .bfl p, .bfl ul, .bfl ol, .bfl dl, .bfl dd { margin: 0; padding: 0; }
.bfl ul, .bfl ol { list-style: none; }
.bfl .bf-icon { width: 1em; height: 1em; fill: currentColor; flex-shrink: 0; }
.bfl-in { position: relative; z-index: 1; width: 100%; max-width: var(--l-w); margin: 0 auto; padding: 0 24px; }

/* 구역 공통 */
.bfl-sec { position: relative; padding: 120px 0; }
.bfl-sec--alt { background: linear-gradient(180deg, var(--l-bg) 0%, var(--l-bg2) 50%, var(--l-bg) 100%); }
.bfl-eyebrow { display: inline-flex; align-items: center; gap: 10px; color: var(--l-sky); font-size: 14px; font-weight: 800; letter-spacing: .22em; text-transform: uppercase; }
.bfl-eyebrow b { display: inline-flex; align-items: center; justify-content: center; min-width: 30px; height: 22px; padding: 0 6px; border-radius: 4px; background: var(--l-sky); color: #04101f; font-size: 12px; letter-spacing: 0; }
.bfl-title { margin-top: 16px; font-size: clamp(30px, 4.4vw, 50px); font-weight: 900; letter-spacing: -.035em; line-height: 1.22; }
.bfl-grad { background: linear-gradient(90deg, var(--l-sky2), var(--l-sky)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.bfl-lead { margin-top: 18px; color: var(--l-ink2); font-size: clamp(16px, 1.7vw, 19px); line-height: 1.75; }
.bfl-head { max-width: 760px; margin: 0 auto 56px; text-align: center; }
.bfl-num-bg { position: absolute; top: 60px; right: max(24px, calc(50% - 560px)); color: transparent; font-size: 220px; font-weight: 900; line-height: 1; letter-spacing: -.05em; -webkit-text-stroke: 1px rgba(120, 170, 230, .13); pointer-events: none; user-select: none; }

/* 첫 화면 */
.bfl-hero { padding: 110px 0 0; text-align: center; background:
    radial-gradient(900px 520px at 50% -10%, rgba(78, 168, 239, .32), transparent 70%),
    linear-gradient(180deg, #0c1b33 0%, var(--l-bg) 78%); }
.bfl-hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(120, 170, 230, .07) 1px, transparent 1px), linear-gradient(90deg, rgba(120, 170, 230, .07) 1px, transparent 1px); background-size: 56px 56px; -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 70%); mask-image: linear-gradient(180deg, #000 0%, transparent 70%); pointer-events: none; }
.bfl-logo { display: inline-flex; height: 52px; }
.bfl-logo img { height: 100%; width: auto; }
.bfl-hero .bfl-eyebrow { display: flex; justify-content: center; margin-top: 40px; }
.bfl-hero h1 { margin-top: 18px; font-size: clamp(40px, 7vw, 84px); font-weight: 900; letter-spacing: -.045em; line-height: 1.12; }
.bfl-hero .bfl-lead { max-width: 680px; margin: 26px auto 0; }
.bfl-chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 34px; }
.bfl-chip { display: inline-flex; align-items: center; gap: 6px; height: 38px; padding: 0 16px; border: 1px solid var(--l-line2); border-radius: 8px; background: rgba(15, 33, 58, .7); color: var(--l-ink2); font-size: 15px; font-weight: 700; }
.bfl-chip.is-mint { border-color: rgba(94, 224, 192, .4); color: var(--l-mint); }
.bfl-btns { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 40px; }
.bfl-btn { display: inline-flex; align-items: center; gap: 8px; height: 56px; padding: 0 28px; border: 1px solid var(--l-line2); border-radius: 999px; color: var(--l-ink); font-size: 17px; font-weight: 800; transition: transform .15s, background-color .15s, box-shadow .15s; }
.bfl-btn:hover { transform: translateY(-2px); background: rgba(78, 168, 239, .12); }
.bfl-btn--primary { border-color: transparent; background: linear-gradient(135deg, #5bb6f6, #2f8de0); color: #fff; box-shadow: 0 12px 40px rgba(47, 141, 224, .45); }
.bfl-btn--primary:hover { background: linear-gradient(135deg, #6cc0fa, #3b97e8); box-shadow: 0 16px 48px rgba(47, 141, 224, .55); }
.bfl-shot { position: relative; margin: 70px auto 0; max-width: 1040px; }
.bfl-shot::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 38%; background: linear-gradient(180deg, transparent, var(--l-bg)); pointer-events: none; }

/* 브라우저 틀 */
.bfl-frame { overflow: hidden; border: 1px solid var(--l-line2); border-radius: 14px; background: #0e1726; box-shadow: 0 40px 100px rgba(0, 0, 0, .55), 0 0 0 1px rgba(255, 255, 255, .02); }
.bfl-frame__bar { display: flex; align-items: center; gap: 7px; height: 40px; padding: 0 16px; border-bottom: 1px solid var(--l-line); background: #111c2e; }
.bfl-frame__bar i { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; }
.bfl-frame__bar i:nth-child(2) { background: #febc2e; }
.bfl-frame__bar i:nth-child(3) { background: #28c840; }
.bfl-frame__bar span { flex: 1; max-width: 420px; height: 24px; margin: 0 auto; border-radius: 6px; background: rgba(255, 255, 255, .06); color: var(--l-muted); font-size: 12.5px; line-height: 24px; text-align: center; }
.bfl-frame img { width: 100%; }

/* 숫자 */
.bfl-nums { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--l-line); border-radius: 16px; overflow: hidden; }
.bfl-nums > div { padding: 44px 20px 40px; border-right: 1px solid var(--l-line); border-bottom: 1px solid var(--l-line); text-align: center; }
.bfl-nums > div:nth-child(3n) { border-right: 0; }
.bfl-nums > div:nth-last-child(-n+3) { border-bottom: 0; }
.bfl-nums strong { display: block; background: linear-gradient(180deg, #e6f4ff, var(--l-sky)); -webkit-background-clip: text; background-clip: text; color: transparent; font-size: clamp(46px, 6vw, 72px); font-weight: 900; letter-spacing: -.04em; line-height: 1; }
.bfl-nums strong small { margin-left: 4px; font-size: .38em; letter-spacing: 0; }
.bfl-nums > div:nth-child(n+4) strong { background-image: linear-gradient(180deg, #e9fff8, var(--l-mint)); }
.bfl-nums b { display: block; margin-top: 18px; font-size: 18px; font-weight: 800; }
.bfl-nums span { display: block; margin-top: 4px; color: var(--l-muted); font-size: 15px; }

/* 핵심 세 가지 */
.bfl-keys { display: grid; gap: 18px; }
.bfl-key { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 10px; padding: 40px 44px; border: 1px solid var(--l-line2); border-radius: 16px; background: linear-gradient(120deg, rgba(25, 56, 96, .55), rgba(10, 20, 36, .4)); }
.bfl-key > em { color: var(--l-sky); font-size: 56px; font-style: normal; font-weight: 900; letter-spacing: -.04em; line-height: 1; }
.bfl-key h3 { font-size: 25px; font-weight: 900; letter-spacing: -.02em; }
.bfl-key p { margin-top: 10px; color: var(--l-ink2); font-size: 16.5px; }
.bfl-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.bfl-tags span { display: inline-flex; align-items: center; height: 32px; padding: 0 13px; border: 1px solid var(--l-line2); border-radius: 6px; background: rgba(78, 168, 239, .1); color: var(--l-sky2); font-size: 14px; font-weight: 700; }
.bfl-tags span.is-coral { border-color: rgba(255, 143, 122, .35); background: rgba(255, 143, 122, .1); color: var(--l-coral); }
.bfl-tags span.is-mint { border-color: rgba(94, 224, 192, .35); background: rgba(94, 224, 192, .08); color: var(--l-mint); }

/* 작은 기능 칸 */
.bfl-feats { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-top: 22px; }
.bfl-feat { padding: 30px 18px 26px; border: 1px solid var(--l-line); border-radius: 14px; background: rgba(12, 24, 42, .6); text-align: center; }
.bfl-feat__icon { display: inline-flex; align-items: center; justify-content: center; width: 54px; height: 54px; border: 1px solid var(--l-line2); border-radius: 13px; background: rgba(78, 168, 239, .12); color: var(--l-sky2); font-size: 25px; }
.bfl-feat:nth-child(n+5) .bfl-feat__icon { border-color: rgba(94, 224, 192, .3); background: rgba(94, 224, 192, .1); color: var(--l-mint); }
.bfl-feat b { display: block; margin-top: 16px; font-size: 17px; font-weight: 800; }
.bfl-feat span { display: block; margin-top: 4px; color: var(--l-muted); font-size: 14px; }

/* 기능 소개 (글 + 화면) */
.bfl-split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); align-items: center; gap: 56px; }
.bfl-split--rev { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.bfl-split--rev > :first-child { order: 2; }
.bfl-split .bfl-title { font-size: clamp(28px, 3.4vw, 42px); }
.bfl-checks { display: grid; gap: 14px; margin-top: 30px; }
.bfl-checks li { display: flex; gap: 12px; color: var(--l-ink2); font-size: 16.5px; }
.bfl-checks li .bf-icon { margin-top: 4px; color: var(--l-sky); font-size: 19px; }
.bfl-checks b { color: var(--l-ink); }
.bfl-duo { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin-top: 50px; }
.bfl-cap { margin-top: 12px; color: var(--l-muted); font-size: 14px; text-align: center; }

/* 마켓 아이템 */
.bfl-items { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 50px; }
.bfl-item { display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--l-line2); border-radius: 14px; background: rgba(12, 24, 42, .7); transition: transform .2s, border-color .2s; }
.bfl-item:hover { transform: translateY(-4px); border-color: var(--l-sky); }
.bfl-item__img { aspect-ratio: 16 / 10; overflow: hidden; background: #0e1726; }
.bfl-item__img img { width: 100%; height: 100%; object-fit: cover; }
.bfl-item__body { padding: 20px 22px 22px; }
.bfl-item__body small { color: var(--l-sky); font-size: 13px; font-weight: 800; letter-spacing: .06em; }
.bfl-item__body b { display: block; margin-top: 6px; font-size: 19px; font-weight: 900; }
.bfl-item__body span { display: block; margin-top: 6px; color: var(--l-muted); font-size: 14.5px; }

/* 안전 카드 */
.bfl-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.bfl-card { padding: 34px 30px; border: 1px solid var(--l-line); border-radius: 16px; background: rgba(12, 24, 42, .6); }
.bfl-card__icon { display: inline-flex; align-items: center; justify-content: center; width: 48px; height: 48px; border-radius: 12px; background: rgba(94, 224, 192, .12); color: var(--l-mint); font-size: 24px; }
.bfl-card b { display: block; margin-top: 18px; font-size: 19px; font-weight: 900; }
.bfl-card p { margin-top: 8px; color: var(--l-ink2); font-size: 15.5px; }

/* 설치 단계 */
.bfl-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; counter-reset: s; }
.bfl-step { position: relative; padding: 36px 30px 32px; border: 1px solid var(--l-line2); border-radius: 16px; background: linear-gradient(160deg, rgba(25, 56, 96, .5), rgba(10, 20, 36, .3)); }
.bfl-step::before { counter-increment: s; content: "0" counter(s); color: var(--l-sky); font-size: 40px; font-weight: 900; letter-spacing: -.03em; }
.bfl-step b { display: block; margin-top: 10px; font-size: 20px; font-weight: 900; }
.bfl-step p { margin-top: 8px; color: var(--l-ink2); font-size: 15.5px; }
.bfl-step code { padding: 1px 6px; border-radius: 4px; background: rgba(255, 255, 255, .08); color: var(--l-sky2); font-size: .92em; }

/* 사양 표 */
.bfl-spec { width: 100%; border-collapse: collapse; border-top: 2px solid var(--l-sky); font-size: 16px; }
.bfl-spec th, .bfl-spec td { padding: 22px 26px; border-bottom: 1px solid var(--l-line); text-align: left; vertical-align: top; }
.bfl-spec th { width: 220px; background: rgba(15, 30, 52, .7); color: var(--l-sky2); font-weight: 800; }
.bfl-spec td { color: var(--l-ink2); }
.bfl-spec td b { color: var(--l-ink); }

/* 마무리 */
.bfl-end { padding: 130px 0 140px; text-align: center; background: radial-gradient(800px 420px at 50% 110%, rgba(78, 168, 239, .35), transparent 70%), var(--l-bg); }
.bfl-end .bfl-title { margin-top: 34px; font-size: clamp(32px, 5vw, 58px); }
.bfl-end .bfl-lead { margin-top: 20px; }

/* 태블릿 */
@media (max-width: 1024px) {
    .bfl-sec { padding: 96px 0; }
    .bfl-split, .bfl-split--rev { grid-template-columns: minmax(0, 1fr); gap: 36px; }
    .bfl-split--rev > :first-child { order: 0; }
    .bfl-feats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .bfl-cards, .bfl-items { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .bfl-num-bg { font-size: 150px; }
}

/* 휴대폰 */
@media (max-width: 640px) {
    .bfl-in { padding: 0 16px; }
    .bfl-sec { padding: 72px 0; }
    .bfl-hero { padding-top: 70px; }
    .bfl-logo { height: 40px; }
    .bfl-eyebrow { font-size: 12px; letter-spacing: .16em; }
    .bfl-chip { height: 34px; padding: 0 12px; font-size: 13.5px; }
    .bfl-btn { height: 50px; padding: 0 22px; font-size: 16px; }
    .bfl-shot { margin-top: 44px; }
    .bfl-head { margin-bottom: 36px; }
    .bfl-nums { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .bfl-nums > div { padding: 30px 10px 28px; border-right: 1px solid var(--l-line) !important; border-bottom: 1px solid var(--l-line) !important; }
    .bfl-nums > div:nth-child(2n) { border-right: 0 !important; }
    .bfl-nums > div:nth-last-child(-n+2) { border-bottom: 0 !important; }
    .bfl-nums b { font-size: 16px; }
    .bfl-nums span { font-size: 13.5px; }
    .bfl-key { grid-template-columns: minmax(0, 1fr); padding: 28px 22px; }
    .bfl-key > em { font-size: 40px; }
    .bfl-key h3 { font-size: 21px; }
    .bfl-feat { padding: 22px 12px 20px; }
    .bfl-cards, .bfl-items, .bfl-steps, .bfl-duo { grid-template-columns: minmax(0, 1fr); }
    .bfl-spec th, .bfl-spec td { display: block; width: auto; padding: 14px 16px; }
    .bfl-spec th { border-bottom: 0; padding-bottom: 6px; }
    .bfl-num-bg { display: none; }
    .bfl-end { padding: 90px 0 100px; }
}

/* 줄바꿈: 낱말 가운데서 끊지 않는다 (테마의 overflow-wrap: anywhere 를 되돌림). 휴대폰에서는 문장 속 강제 줄바꿈을 뺀다 */
.bfl, .bfl * { overflow-wrap: break-word; }
@media (max-width: 640px) {
    .bfl-lead br { display: none; }
}