:root {
    --bg: #000;
    --card: #121a2a;
    --ink: #3fff04;
    --muted: #3ff04;
    --brand: #3b82f6;
    --shadow: 0 10px 25px rgba(0, 0, 0, .25);
}

* {
    box-sizing: border-box
}

html,
body {
    height: 100%
}

body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Noto Sans, Helvetica, Arial;
    background: radial-gradient(1200px 600px at 10% -10%, #16233d 0%, #000 45%), var(--bg);
    color: var(--ink);
}

.container {
    max-width: 380px;
    margin: 0vh auto;
    background: linear-gradient(180deg, rgba(223, 223, 1, .10), rgba(223, 223, 1, .10));
    border-radius: 24px;
    box-shadow: var(--shadow);
}

h1 {
    margin: 0 0 8px 0;
    font-size: 28px;
    letter-spacing: .5px
}

.tip {
    margin: 0 0 18px 0;
    color: var(--muted)
}

.input-row {
    display: flex;
    gap: 0px;
    margin: 14px 0 8px 0;
}

.input-row input {
    flex: 1;
    padding: 14px 16px;
    border-radius: 0px;
    border: 1px solid rgba(255, 255, 255, .1);
    background: #0f172a;
    color: var(--ink);
    outline: none;
    font-size: 16px;
}

.input-row input::placeholder {
    color: #64748b
}

.btn {
    padding: 12px 18px;
    border-radius: 0px;
    border: none;
    cursor: pointer;
    background: #ff1818;
    color: white;
    font-weight: 600;
    letter-spacing: .2px;
}

.btn:hover {
    background: #15e213;
}

.hint {
    color: #8ca0b4
}

.hint code {
    padding: 2px 6px;
    border-radius: 6px;
    background: #0f172a;
    border: 1px solid rgba(255, 255, 255, .06);
}

.modal {
    position: fixed;
    inset: 0;
    display: none;
    place-items: center;
    background: rgba(2, 6, 23, .46);
    backdrop-filter: blur(4px);
    z-index: 50;
}

.modal.open {
    display: grid
}

.modal-box {
    width: min(380px, 22vw);
    background: var(--card);
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 18px;
    padding: 18px 18px 20px;
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
}

.modal-image {
    width: 120px;
    height: 120px;
    object-fit: contain;
    margin: 8px auto 12px;
}

.modal-title {
    margin: 8px 0 6px;
    font-size: 22px
}

.modal-desc {
    margin: 0 0 12px;
    color: var(--muted)
}

.modal-close {
    position: absolute;
    right: 10px;
    top: 8px;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, .1);
    background: #0f172a;
    color: #cbd5e1;
    cursor: pointer;
    font-size: 20px;
    line-height: 1;
}

.btn-primary {
    display: inline-block;
    min-width: 120px
}

:root {
    --bg: #333332;
    --panel: #333332;
    --radius: 0px;
}

* {
    box-sizing: border-box
}

html,
body {
    height: 100%
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
    display: flex;
    justify-content: center;
    align-items: stretch;
}

.phone {
    width: 390px;
    height: 100vh;
    max-height: 100vh;
    background: var(--panel);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: auto;
    position: relative;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
}

.topbar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px 8px;
    background: #1a1f28;
    border-bottom: 1px solid #0f141c;
    position: sticky;
    top: 0;
    z-index: 0;
}

.brand-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    /* 一行4列 */
    gap: 8px;
    /* 图片之间的间距 */
    padding: 12px;
}

.brand-grid .cell {
    height: 40px;
    /* 每个logo的高度，可按需改 */
}

.brand-grid img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    /* 不变形，等比缩放 */
    display: block;
}

.container .intro-headline {
    margin: 10px 12px 12px;
    text-align: center;
}

.container .intro-headline__title {
    margin: 0;
    text-transform: uppercase;
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: .06em;
    font-size: clamp(22px, 6.2vw, 34px);
    background: linear-gradient(180deg, #ffd36e 0%, #f0a500 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    text-shadow: 0 2px 0 rgba(0, 0, 0, .18);
}

.container .intro-headline__sub {
    margin: 8px 0 0;
    font-size: clamp(14px, 3.6vw, 18px);
    font-weight: 700;
    color: #f1f5f9;
    letter-spacing: .02em;
}

@supports not (-webkit-background-clip: text) {
    .container .intro-headline__title {
        -webkit-text-fill-color: initial;
        color: #f0a500;
        background: none;
        text-shadow: none;
    }
}

.lines-card {
    margin: 12px 0;
    padding: 14px;
    border-radius: 16px;
    background: #0f1420;
    border: 1px solid rgba(255, 255, 255, .08);
    box-shadow: 0 8px 24px rgba(0, 0, 0, .28);
}

.lines-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 800;
    color: #ffd88a;
    margin: 0 0 10px 0;
}

.lines-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 10px;
}

.line-row {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 12px;
    background: #121a2a;
    border: 1px solid rgba(255, 255, 255, .06);
}

.line-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: #ff5b56;
    color: #fff;
    font-weight: 700;
}

.line-domain {
    color: #e6eef9;
    font-weight: 700;
    word-break: break-all;
}

.line-btn {
    padding: 8px 12px;
    border: 0;
    border-radius: 10px;
    cursor: pointer;
    background: #ff3a2f;
    color: #fff;
    font-weight: 700;
}

.line-btn:active {
    transform: translateY(1px);
}

.why-box {
    position: relative;
    margin: 16px 12px 12px;
    padding: 14px 16px;
    border-radius: 16px;
    background: #0e141f;
    /* 深色卡片底 */
    border: 1px solid rgba(255, 255, 255, .10);
    /* 细描边 */
    box-shadow: 0 8px 24px rgba(0, 0, 0, .28);
    /* 阴影 */
}

.why-box::before {
    content: "";
    position: absolute;
    left: 10px;
    top: 10px;
    bottom: 10px;
    width: 3px;
    border-radius: 3px;
    background: linear-gradient(180deg, #fdd835, #ffb300);
}

.why-box h2 {
    margin: 0 0 8px;
    font-size: 18px;
    line-height: 1.35;
    font-weight: 800;
    color: #ffd88a;
    letter-spacing: .2px;
}

.why-box p {
    margin: 0;
    font-size: 14px;
    line-height: 1.65;
    color: #cbd5e1;
}

.why--gold {
    border: 1px solid transparent;
    background: linear-gradient(#0e141f, #0e141f) padding-box, linear-gradient(90deg, #fdd835, #ffb300) border-box;
}

.why--green {
    border: 1px solid transparent;
    background: linear-gradient(#0e141f, #0e141f) padding-box, linear-gradient(90deg, #34d399, #059669) border-box;
}

.why--green h2 {
    color: #34d399;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 64px;
    padding: 10px 0;
    background: #1a1f28;
    border-bottom: 1px solid #0f141c;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.brand-logo {
    height: 50px;
    width: auto;
    display: block;
    object-fit: contain;
}

.fab-stack {
    position: fixed;
    right: 14px;
    bottom: 18px;
    display: grid;
    gap: 12px;
    z-index: 9999;
}

.fab {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: #111;
    color: #fff;
    cursor: pointer;
    box-shadow: 0 10px 24px rgba(0, 0, 0, .25);
    border: 2px solid rgba(255, 255, 255, .15);
    transition: transform .15s ease;
}

.fab:hover {
    transform: translateY(-2px);
}

.fab img,
.fab svg {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: contain;
}

.fab.fab--cover img,
.fab.fab--cover svg {
    width: 100%;
    height: 100%;
}

/* 你也可调到 40px */

@media (max-width: 420px) {
    .fab {
        width: 50px;
        height: 50px;
    }
    .fab img,
    .fab svg {
        width: 100%;
        height: 100%;
    }
    .fab.fab--cover img,
    .fab.fab--cover svg {
        width: 100%;
        height: 100%;
    }
}