@font-face {
    font-family: Inter;
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url("../fonts/inter-400.woff2") format("woff2");
}
@font-face {
    font-family: Inter;
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url("../fonts/inter-600.woff2") format("woff2");
}
@font-face {
    font-family: Inter;
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url("../fonts/inter-700.woff2") format("woff2");
}
@font-face {
    font-family: Inter;
    font-style: normal;
    font-weight: 800;
    font-display: swap;
    src: url("../fonts/inter-800.woff2") format("woff2");
}

:root {
    --navy: #10243e;
    --body: #3c5168;
    --muted: #8b9cb0;
    --line: #e6ebf2;
    --blue: #1d92f3;
    --link: #1a93ea;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    color: var(--body);
    background: #fff;
    font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 16.5px;
    line-height: 1.7;
}
img { max-width: 100%; }
strong { color: var(--navy); font-weight: 700; }
a { color: inherit; }

.hero {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 640px;
    height: 86vh;
    max-height: 820px;
    color: #fff;
    background-color: #140910;
    background-position: center 42%;
    background-size: cover;
    background-repeat: no-repeat;
    overflow: hidden;
}
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(8, 4, 16, .55), rgba(8, 4, 16, .48) 40%, rgba(8, 4, 16, .62));
    z-index: 1;
}
.hero--plain {
    background-image:
        radial-gradient(circle at 18% 42%, rgba(236, 72, 153, .62), transparent 34%),
        radial-gradient(circle at 78% 36%, rgba(34, 211, 238, .28), transparent 30%),
        linear-gradient(180deg, #2a1230, #120814 70%);
}
.studio { position: absolute; inset: 0; z-index: 0; }
.speaker {
    position: absolute;
    top: 16%;
    width: 17vw;
    min-width: 120px;
    max-width: 230px;
    height: 52%;
    background: linear-gradient(180deg, #2c2c31, #111114);
    border-radius: 6px;
    box-shadow: inset 0 0 0 10px #1a1a1e, 0 20px 40px rgba(0, 0, 0, .25);
}
.speaker::before,
.speaker::after {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 50%;
    background: radial-gradient(circle at 40% 40%, #4b4b52, #0d0d10 68%);
}
.speaker::before { width: 46%; aspect-ratio: 1; top: 14%; }
.speaker::after { width: 68%; aspect-ratio: 1; top: 48%; }
.speaker-l { left: 5%; }
.speaker-r { right: 5%; }
.diamonds {
    position: absolute;
    left: 50%;
    top: -8%;
    width: min(46vw, 560px);
    height: 78%;
    transform: translateX(-50%);
    background:
        linear-gradient(135deg, transparent 46%, rgba(244, 114, 182, .55) 46% 50%, transparent 50%),
        linear-gradient(45deg, transparent 46%, rgba(251, 113, 133, .35) 46% 50%, transparent 50%);
    opacity: .85;
}
.hero-center,
.scroll-down { position: relative; z-index: 2; }
.hero-center {
    text-align: center;
    padding: 48px 22px 88px;
    max-width: 760px;
}
.hero h1 {
    margin: 0 0 14px;
    font-size: clamp(40px, 4.4vw, 54px);
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.035em;
    text-shadow: 0 2px 18px rgba(0, 0, 0, .35);
}
.hero .lead {
    margin: 0 auto 26px;
    max-width: 540px;
    font-size: 17px;
    line-height: 1.65;
    font-weight: 400;
    color: rgba(255, 255, 255, .95);
    text-shadow: 0 1px 12px rgba(0, 0, 0, .4);
}
.scroll-down {
    position: absolute;
    left: 50%;
    bottom: 26px;
    transform: translateX(-50%);
    width: 42px;
    height: 42px;
    border: 1.5px solid rgba(255, 255, 255, .8);
    border-radius: 50%;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}
.scroll-down:hover { background: rgba(255, 255, 255, .12); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 158px;
    padding: 12px 22px;
    border-radius: 999px;
    background: linear-gradient(180deg, #47b0f8 0%, #1d92f3 100%);
    color: #fff;
    font-weight: 700;
    font-size: 15px;
    line-height: 1;
    text-decoration: none;
    box-shadow: 0 8px 18px rgba(29, 146, 243, .28);
}
a.btn:hover { filter: brightness(1.05); transform: translateY(-1px); }
.btn-lg { min-width: 176px; padding: 14px 28px; font-size: 16px; }
span.btn { cursor: default; }

.intro-wrap { border-bottom: 1px solid var(--line); }
.intro {
    max-width: 760px;
    margin: 0 auto;
    padding: 72px 24px 64px;
    text-align: center;
    color: #16324f;
    font-size: 18px;
    line-height: 1.75;
}

.section-head { text-align: center; padding: 96px 24px 10px; }
.section-head h2,
.cta h2,
.copy h2 {
    margin: 0 auto 14px;
    color: var(--navy);
    font-weight: 800;
    letter-spacing: -0.035em;
    line-height: 1.15;
}
.section-head h2 {
    max-width: 680px;
    font-size: clamp(32px, 4vw, 46px);
}
.section-head p {
    max-width: 760px;
    margin: 0 auto;
    color: var(--muted);
    font-size: 18px;
    line-height: 1.6;
}
.section-head.tools { padding-top: 108px; }

.wrap { max-width: 1100px; margin: 0 auto; padding: 10px 28px 20px; }
.platform {
    display: grid;
    grid-template-columns: 1.05fr .95fr;
    gap: 72px;
    align-items: center;
    padding: 42px 0;
}
.brand-card {
    aspect-ratio: 16 / 10.4;
    border-radius: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 14px 34px rgba(16, 36, 62, .08);
}
.brand-yt { background: #ff0000; }
.brand-fb { background: #1877f2; }
.brand-sp { background: #1ed760; }
.yt-lockup, .sp-lockup, .fb-lockup {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    color: #fff;
}
.yt-word, .sp-lockup span {
    font-family: Arial, Helvetica, sans-serif;
    font-weight: 700;
    font-size: clamp(40px, 4vw, 54px);
    letter-spacing: -1.5px;
    line-height: 1;
}
.yt-play {
    width: 72px;
    height: 50px;
    background: #fff;
    border-radius: 14px;
    position: relative;
    flex: 0 0 auto;
}
.yt-play::after {
    content: "";
    position: absolute;
    left: 28px;
    top: 15px;
    border-style: solid;
    border-width: 10px 0 10px 18px;
    border-color: transparent transparent transparent #ff0000;
}
.fb-f {
    width: 86px;
    height: 86px;
    border-radius: 50%;
    background: #fff;
    color: #1877f2;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 58px;
    font-weight: 700;
    line-height: 1;
    padding-top: 4px;
}
.platform h3 {
    margin: 0 0 12px;
    color: var(--navy);
    font-size: 32px;
    letter-spacing: -0.03em;
    line-height: 1.2;
}
.platform p, .copy p { margin: 0 0 16px; color: var(--body); }
.text-link {
    color: var(--link);
    font-weight: 700;
    text-decoration: none;
}
.text-link:hover { text-decoration: underline; }

.split {
    max-width: 1100px;
    margin: 0 auto;
    padding: 54px 28px;
    display: grid;
    grid-template-columns: 1fr 1.05fr;
    gap: 64px;
    align-items: center;
}
.split.pages { grid-template-columns: 1.08fr .92fr; padding-top: 24px; padding-bottom: 70px; }
.copy h2 { margin-left: 0; font-size: clamp(30px, 3vw, 36px); text-align: left; }
.copy p { font-size: 16.5px; line-height: 1.75; }

.shot {
    border-radius: 28px;
    overflow: hidden;
    box-shadow: 0 18px 44px rgba(16, 36, 62, .12);
}
.shot img { display: block; width: 100%; height: auto; }

.presave-frame {
    background: linear-gradient(160deg, #22c55e 0%, #2dd4bf 70%);
    border-radius: 34px;
    padding: 22px 0 0 22px;
}
.presave-screen {
    position: relative;
    min-height: 460px;
    border-radius: 26px 0 28px 0;
    overflow: hidden;
    background:
        radial-gradient(circle at 50% 40%, rgba(255, 255, 255, .08), transparent 42%),
        linear-gradient(180deg, #243246, #1a2433 60%, #121820);
    display: flex;
    align-items: center;
    justify-content: center;
}
.hex {
    position: absolute;
    width: min(78%, 320px);
    height: auto;
    opacity: .9;
}
.ps-copy { position: relative; z-index: 1; text-align: center; color: #fff; padding: 30px 18px; }
.ps-copy strong {
    display: block;
    color: #fff;
    letter-spacing: .18em;
    font-size: 28px;
    font-weight: 700;
}
.ps-copy p { color: rgba(255, 255, 255, .88); font-size: 13px; max-width: 250px; margin: 8px auto 16px; line-height: 1.45; }
.ps-btn {
    width: 230px;
    height: 40px;
    margin: 8px auto;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 700;
}
.ps-green { background: #1db954; color: #fff; }
.ps-green i {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #fff;
    box-shadow: inset 0 0 0 3px #1db954;
}
.ps-white { background: #fff; color: #111; }
.ps-dark { background: #111; color: #fff; }
.ps-copy small { display: block; margin-top: 10px; font-size: 10px; color: rgba(255, 255, 255, .62); }

.devices {
    position: relative;
    min-height: 430px;
    border-radius: 36px;
    background: linear-gradient(145deg, #f9a8d4 0%, #e9d5ff 42%, #93c5fd 100%);
    padding: 34px 28px 26px;
}
.laptop { width: min(100%, 470px); }
.laptop-screen {
    background: #f8fafc;
    border: 8px solid #d7dde6;
    border-bottom-width: 10px;
    border-radius: 14px 14px 4px 4px;
    overflow: hidden;
    box-shadow: 0 16px 30px rgba(15, 23, 42, .12);
}
.lap-top {
    display: flex;
    gap: 5px;
    align-items: center;
    padding: 7px 10px;
    background: #fff;
    color: #94a3b8;
    font-size: 10px;
    font-style: normal;
}
.lap-top span { width: 7px; height: 7px; border-radius: 50%; background: #e2e8f0; display: block; }
.lap-top em { margin-left: auto; font-style: normal; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 12px; }
.stats div { background: #fff; border-radius: 10px; padding: 10px 8px; text-align: center; }
.stats b { display: block; color: #fb7185; font-size: 22px; letter-spacing: -0.04em; }
.stats b.blue { color: #60a5fa; }
.stats b.violet { color: #a78bfa; }
.stats span { color: #94a3b8; font-size: 11px; }
.area { display: block; width: 100%; height: 92px; background: #fff; }
.laptop-base {
    height: 12px;
    margin: 0 8%;
    background: linear-gradient(180deg, #e8edf3, #cfd6e0);
    border-radius: 0 0 8px 8px;
}
.phone {
    position: absolute;
    right: 22px;
    bottom: 18px;
    width: 168px;
    background: #111;
    border-radius: 26px;
    padding: 8px;
    box-shadow: 0 18px 36px rgba(15, 23, 42, .28);
}
.phone-screen { background: #fff; border-radius: 18px; overflow: hidden; }
.album {
    height: 132px;
    background:
        linear-gradient(180deg, rgba(0, 0, 0, .05), rgba(0, 0, 0, .35)),
        linear-gradient(160deg, #f6d7a8, #c2410c 55%, #7c2d12);
    display: flex;
    align-items: flex-end;
    padding: 10px;
}
.album span { color: #fff; font-weight: 700; font-size: 13px; }
.phone-meta { padding: 8px 10px 0; }
.phone-meta b { display: block; font-size: 13px; color: var(--navy); }
.phone-meta small { color: #94a3b8; }
.phone-meta strong { display: block; margin-top: 6px; font-size: 22px; letter-spacing: -0.04em; }
.spark { display: block; width: 100%; height: 36px; }

.cta { text-align: center; padding: 70px 24px 120px; }
.cta h2 { font-size: clamp(32px, 4vw, 42px); }
.cta p { margin: 0 0 26px; color: var(--muted); font-size: 18px; }

@media (max-width: 900px) {
    .hero { height: auto; min-height: 560px; max-height: none; }
    .platform, .split, .split.pages { grid-template-columns: 1fr; gap: 28px; }
    .brand-card { aspect-ratio: 16 / 9; }
    .section-head { padding-top: 64px; }
    .speaker { display: none; }
    .devices { min-height: 0; padding-bottom: 170px; }
    .phone { width: 140px; }
}
@media (max-width: 640px) {
    .wrap, .split { padding-left: 18px; padding-right: 18px; }
    .intro { padding: 48px 18px; font-size: 16px; }
    .yt-word, .sp-lockup span { font-size: 36px; }
    .presave-screen { min-height: 400px; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .btn { transition: none; }
}