@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700;900&family=Outfit:wght@500;700;800&display=swap");

:root {
    --ink: #12151c;
    --muted: #5c6578;
    --line: rgba(18, 21, 28, 0.08);
    --live: #e23d3d;
    --live-deep: #b4232a;
    --stage: #1a1f2b;
    --glow: #ff8a4c;
    --paper: #eef1f5;
    --panel: #ffffff;
    --accent: #0f766e;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: "Noto Sans SC", "PingFang SC", sans-serif;
    -webkit-font-smoothing: antialiased;
}

.site-nav {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 40;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 clamp(20px, 4vw, 56px);
    background: linear-gradient(180deg, rgba(18, 21, 28, 0.55), transparent);
    color: #fff;
}
.brand {
    font-family: Outfit, "Noto Sans SC", sans-serif;
    font-weight: 800;
    font-size: clamp(22px, 2.4vw, 30px);
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    gap: 10px;
}
.brand-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--live);
    box-shadow: 0 0 0 0 rgba(226, 61, 61, 0.7);
    animation: pulse 1.8s ease-out infinite;
}
.nav-actions { display: flex; gap: 10px; align-items: center; }
.nav-link {
    color: rgba(255, 255, 255, 0.88);
    background: transparent;
    border: 0;
    font-size: 14px;
    cursor: pointer;
    padding: 8px 12px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
}
.nav-link:hover { color: #fff; }
.btn {
    border: 0;
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    border-radius: 999px;
    padding: 12px 22px;
    font-size: 14px;
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.btn:hover { transform: translateY(-1px); }
.btn-live {
    background: var(--live);
    color: #fff;
    box-shadow: 0 10px 28px rgba(226, 61, 61, 0.35);
}
.btn-live:hover { background: var(--live-deep); }
.btn-ghost {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.28);
    backdrop-filter: blur(8px);
}
.btn-dark {
    background: var(--ink);
    color: #fff;
}
.btn-outline {
    background: transparent;
    color: var(--ink);
    border: 1px solid var(--line);
}

.hero {
    position: relative;
    min-height: 100vh;
    min-height: 100svh;
    display: flex;
    align-items: flex-end;
    overflow: hidden;
    color: #fff;
    background:
        linear-gradient(115deg, rgba(18, 21, 28, 0.78) 18%, rgba(18, 21, 28, 0.35) 55%, rgba(18, 21, 28, 0.72) 100%),
        radial-gradient(ellipse at 70% 40%, rgba(255, 138, 76, 0.35), transparent 45%),
        radial-gradient(ellipse at 20% 80%, rgba(226, 61, 61, 0.28), transparent 40%),
        url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1600' height='900' viewBox='0 0 1600 900'%3E%3Cdefs%3E%3ClinearGradient id='g' x1='0' y1='0' x2='1' y2='1'%3E%3Cstop stop-color='%231a1f2b'/%3E%3Cstop offset='1' stop-color='%232a2030'/%3E%3C/linearGradient%3E%3C/defs%3E%3Crect width='1600' height='900' fill='url(%23g)'/%3E%3Cg fill='none' stroke='rgba(255,255,255,0.06)' stroke-width='1'%3E%3Cpath d='M0 180h1600M0 360h1600M0 540h1600M0 720h1600'/%3E%3Cpath d='M200 0v900M400 0v900M600 0v900M800 0v900M1000 0v900M1200 0v900M1400 0v900'/%3E%3C/g%3E%3Ccircle cx='1180' cy='280' r='180' fill='rgba(226,61,61,0.18)'/%3E%3Ccircle cx='1260' cy='340' r='90' fill='rgba(255,138,76,0.22)'/%3E%3Crect x='180' y='420' width='420' height='240' rx='18' fill='rgba(255,255,255,0.04)' stroke='rgba(255,255,255,0.08)'/%3E%3Crect x='220' y='460' width='180' height='14' rx='7' fill='rgba(255,255,255,0.35)'/%3E%3Crect x='220' y='500' width='260' height='10' rx='5' fill='rgba(255,255,255,0.18)'/%3E%3Crect x='220' y='540' width='120' height='10' rx='5' fill='rgba(255,255,255,0.12)'/%3E%3C/svg%3E") center/cover no-repeat;
}
.hero::after {
    content: "";
    position: absolute;
    inset: auto 0 0 0;
    height: 140px;
    background: linear-gradient(180deg, transparent, var(--paper));
    pointer-events: none;
}
.hero-inner {
    position: relative;
    z-index: 2;
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto 12vh;
    animation: rise .9s ease both;
}
.hero-brand {
    font-family: Outfit, "Noto Sans SC", sans-serif;
    font-size: clamp(42px, 8vw, 88px);
    font-weight: 800;
    line-height: 0.95;
    letter-spacing: -0.03em;
    margin: 0 0 18px;
    max-width: 12ch;
}
.hero h1 {
    margin: 0 0 14px;
    font-size: clamp(22px, 3.2vw, 36px);
    font-weight: 700;
    letter-spacing: -0.02em;
    max-width: 16ch;
}
.hero p {
    margin: 0 0 28px;
    max-width: 36ch;
    color: rgba(255, 255, 255, 0.82);
    font-size: clamp(15px, 1.6vw, 18px);
    line-height: 1.7;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; }

.section {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
    padding: 72px 0;
}
.section-head {
    max-width: 560px;
    margin-bottom: 36px;
}
.section-head h2 {
    margin: 0 0 10px;
    font-size: clamp(28px, 3.5vw, 40px);
    letter-spacing: -0.03em;
}
.section-head p {
    margin: 0;
    color: var(--muted);
    line-height: 1.7;
    font-size: 16px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px 32px;
}
.feature-item h3 {
    margin: 0 0 8px;
    font-size: 20px;
}
.feature-item p {
    margin: 0;
    color: var(--muted);
    line-height: 1.7;
}
.feature-item .idx {
    font-family: Outfit, sans-serif;
    color: var(--live);
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.08em;
    margin-bottom: 10px;
}

.scene {
    margin: 24px auto 0;
    width: min(1120px, calc(100% - 40px));
    border-radius: 28px;
    overflow: hidden;
    min-height: 340px;
    position: relative;
    background:
        linear-gradient(120deg, rgba(15, 118, 110, 0.88), rgba(26, 31, 43, 0.75)),
        radial-gradient(circle at 80% 20%, rgba(255, 138, 76, 0.45), transparent 40%),
        var(--stage);
    color: #fff;
    display: grid;
    place-items: center;
    text-align: center;
    padding: 48px 24px;
}
.scene h2 {
    margin: 0 0 12px;
    font-size: clamp(28px, 4vw, 44px);
    letter-spacing: -0.03em;
}
.scene p {
    margin: 0 auto 24px;
    max-width: 42ch;
    color: rgba(255, 255, 255, 0.82);
    line-height: 1.7;
}
.scene-glow {
    position: absolute;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    filter: blur(20px);
    animation: drift 8s ease-in-out infinite alternate;
    pointer-events: none;
}

.pricing {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
}
.price-item {
    padding: 28px 24px;
    border-top: 3px solid var(--ink);
    background: transparent;
}
.price-item h3 {
    margin: 0 0 6px;
    font-size: 22px;
}
.price-item .amount {
    font-family: Outfit, sans-serif;
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 12px 0;
}
.price-item .amount span {
    font-size: 14px;
    font-weight: 500;
    color: var(--muted);
    margin-left: 4px;
}
.price-item .meta {
    color: var(--muted);
    font-size: 14px;
    margin-bottom: 18px;
    min-height: 40px;
    line-height: 1.6;
}
.price-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.price-actions .btn { padding: 10px 16px; border-radius: 10px; font-size: 13px; }
.btn-wx { background: #07c160; color: #fff; }
.btn-ali { background: #1677ff; color: #fff; }

.faq-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.faq-item {
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
}
.faq-item h4 { margin: 0 0 8px; font-size: 17px; }
.faq-item p { margin: 0; color: var(--muted); line-height: 1.7; }

.site-foot {
    padding: 40px 20px 56px;
    text-align: center;
    color: var(--muted);
    font-size: 13px;
}

.ok-box {
    background: #ecfdf5;
    color: #047857;
    padding: 10px 12px;
    border-radius: 8px;
    margin-top: 8px;
    line-height: 1.6;
}
.pay-tip {
    font-size: 13px;
    color: #606266;
    margin-top: 8px;
    line-height: 1.6;
}
.qr-box {
    text-align: center;
    padding: 8px 0;
}
.qr-box img {
    width: 200px;
    height: 200px;
    background: #fff;
    border: 1px solid #eee;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(226, 61, 61, 0.55); }
    70% { box-shadow: 0 0 0 12px rgba(226, 61, 61, 0); }
    100% { box-shadow: 0 0 0 0 rgba(226, 61, 61, 0); }
}
@keyframes rise {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes drift {
    from { transform: translate(-40%, -10%); }
    to { transform: translate(30%, 20%); }
}

@media (max-width: 860px) {
    .feature-grid { grid-template-columns: 1fr; gap: 24px; }
    .hero-inner { margin-bottom: 18vh; }
    .site-nav { height: 64px; }
}