:root {
    --bg: #070b16;
    --panel: #0e1628;
    --panel2: #111d33;
    --line: rgba(151, 180, 230, .15);
    --muted: #91a2c2;
    --text: #edf4ff;
    --cyan: #5ee7f5;
    --blue: #638cff;
    --purple: #9b7cff;
    --green: #43e0ae;
    --danger: #ff718b
}

* {
    box-sizing: border-box
}

html {
    scroll-behavior: smooth
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
    line-height: 1.6
}

a {
    color: inherit;
    text-decoration: none
}

a:hover {
    color: var(--cyan)
}

.navbar {
    background: rgba(7, 11, 22, .82);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line)
}

.navbar-brand {
    font-weight: 800;
    letter-spacing: .04em;
    color: #fff !important
}

.brand-mark {
    width: 34px;
    height: 34px;
    display: inline-grid;
    place-items: center;
    border-radius: 11px;
    background: linear-gradient(135deg, var(--cyan), var(--blue) 55%, var(--purple));
    color: #06101e;
    font-weight: 900;
    margin-right: 9px;
    box-shadow: 0 0 25px rgba(94, 231, 245, .22)
}

.nav-link {
    color: #aebbd3 !important;
    font-weight: 600;
    font-size: .94rem
}

.nav-link:hover,
.nav-link.active {
    color: #fff !important
}

.btn-neon {
    border: 0;
    color: #06101e;
    background: linear-gradient(110deg, var(--cyan), #83b5ff);
    font-weight: 800;
    border-radius: 10px;
    padding: .72rem 1.15rem;
    box-shadow: 0 8px 30px rgba(94, 231, 245, .13);
    transition: .2s
}

.btn-neon:hover {
    color: #06101e;
    transform: translateY(-2px);
    filter: brightness(1.08)
}

.btn-outline-soft {
    border: 1px solid rgba(157, 190, 245, .28);
    color: #dce8ff;
    border-radius: 10px;
    padding: .68rem 1.1rem;
    font-weight: 700
}

.btn-outline-soft:hover {
    border-color: var(--cyan);
    color: var(--cyan);
    background: rgba(94, 231, 245, .06)
}

.billing-switch {
    display: inline-flex;
    gap: 5px;
    padding: 5px;
    background: #111d33;
    border: 1px solid rgba(151, 180, 230, .15);
    border-radius: 12px
}

.billing-option {
    padding: 9px 22px;
    border-radius: 9px;
    color: #91a2c2;
    font-weight: 700;
    cursor: pointer;
    transition: .2s;
    user-select: none
}

.billing-option.active {
    background: linear-gradient(110deg, #5ee7f5, #83b5ff);
    color: #06101e;
    box-shadow: 0 3px 15px rgba(94, 231, 245, .15)
}

.billing-option span {
    font-size: 11px;
    margin-left: 4px;
    color: #43e0ae
}

.billing-option.active span {
    color: #075d66
}

.hero {
    position: relative;
    overflow: hidden;
    padding: 112px 0 92px;
    background: radial-gradient(ellipse at 75% 22%, rgba(71, 112, 255, .22), transparent 38%), radial-gradient(ellipse at 18% 72%, rgba(37, 211, 218, .12), transparent 35%), linear-gradient(180deg, #0a1020 0%, #070b16 100%)
}

.hero:before,
.page-hero:before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(121, 160, 220, .055) 1px, transparent 1px), linear-gradient(90deg, rgba(121, 160, 220, .055) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: linear-gradient(to bottom, black, transparent 90%);
    pointer-events: none
}

.hero .container,
.page-hero .container {
    position: relative;
    z-index: 1
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    color: var(--cyan);
    font-size: .76rem;
    font-weight: 800;
    letter-spacing: .17em;
    text-transform: uppercase
}

.eyebrow:before {
    content: "";
    width: 22px;
    height: 1px;
    background: var(--cyan)
}

.hero h1 {
    font-size: clamp(2.7rem, 6vw, 5.2rem);
    font-weight: 850;
    letter-spacing: -.055em;
    line-height: 1.04;
    margin: 22px 0
}

.gradient-text {
    background: linear-gradient(100deg, #fff 8%, #83eefa 52%, #9e9aff 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent
}

.lead-copy {
    max-width: 620px;
    color: #a8b7d2;
    font-size: 1.12rem
}

.hero-visual {
    min-height: 360px;
    display: grid;
    place-items: center;
    position: relative
}

.orbit {
    width: min(360px, 80vw);
    aspect-ratio: 1;
    border: 1px solid rgba(94, 231, 245, .25);
    border-radius: 50%;
    display: grid;
    place-items: center;
    position: relative;
    box-shadow: 0 0 90px rgba(57, 131, 255, .1), inset 0 0 70px rgba(57, 131, 255, .08)
}

.orbit:before,
.orbit:after {
    content: "";
    position: absolute;
    border: 1px solid rgba(139, 158, 255, .2);
    border-radius: 50%;
    inset: 12%
}

.orbit:after {
    inset: 25%;
    border-color: rgba(94, 231, 245, .28)
}

.core {
    width: 125px;
    height: 125px;
    border-radius: 34px;
    display: grid;
    place-items: center;
    background: linear-gradient(145deg, #15334a, #17254b);
    border: 1px solid rgba(94, 231, 245, .5);
    box-shadow: 0 0 60px rgba(94, 231, 245, .2);
    transform: rotate(-12deg)
}

.core span {
    font-size: 3.2rem;
    font-weight: 900;
    color: var(--cyan);
    transform: rotate(12deg)
}

.float-chip {
    position: absolute;
    background: rgba(13, 25, 46, .92);
    border: 1px solid var(--line);
    padding: 10px 14px;
    border-radius: 12px;
    color: #dceaff;
    font-size: .82rem;
    box-shadow: 0 14px 40px rgba(0, 0, 0, .25)
}

.float-chip.one {
    top: 12%;
    right: -2%
}

.float-chip.two {
    bottom: 15%;
    left: -5%
}

.section {
    padding: 82px 0
}

.section-title {
    font-weight: 800;
    letter-spacing: -.035em;
    font-size: clamp(1.9rem, 4vw, 3rem)
}

.section-sub {
    color: var(--muted);
    max-width: 650px
}

.panel,
.feature-card,
.price-card,
.account-card,
.form-card {
    background: linear-gradient(145deg, rgba(18, 30, 52, .96), rgba(11, 19, 35, .96));
    border: 1px solid var(--line);
    border-radius: 18px
}

.feature-card {
    padding: 27px;
    height: 100%;
    transition: .25s
}

.feature-card:hover,
.price-card:hover {
    transform: translateY(-5px);
    border-color: rgba(94, 231, 245, .38)
}

.icon-box {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    color: var(--cyan);
    background: rgba(94, 231, 245, .1);
    font-size: 1.35rem;
    margin-bottom: 20px
}

.feature-card h3 {
    font-size: 1.08rem;
    font-weight: 800
}

.feature-card p {
    color: var(--muted);
    margin: 0;
    font-size: .94rem
}

.stat-card {
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 15px;
    background: rgba(17, 29, 51, .7)
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 850;
    letter-spacing: -.04em
}

.stat-label {
    font-size: .82rem;
    color: var(--muted)
}

.page-hero {
    position: relative;
    padding: 76px 0 48px;
    background: radial-gradient(ellipse at 80% 0%, rgba(71, 112, 255, .2), transparent 42%), #0a1020;
    overflow: hidden
}

.page-hero h1 {
    font-size: clamp(2.3rem, 5vw, 3.8rem);
    font-weight: 850;
    letter-spacing: -.05em
}

.page-hero p {
    color: var(--muted);
    max-width: 650px
}

.price-card {
    padding: 30px;
    height: 100%;
    position: relative;
    transition: .25s
}

.price-card.featured {
    border-color: rgba(94, 231, 245, .6);
    box-shadow: 0 0 45px rgba(94, 231, 245, .08)
}

.popular {
    position: absolute;
    right: 18px;
    top: 18px;
    font-size: .68rem;
    font-weight: 900;
    letter-spacing: .1em;
    color: #07101b;
    background: var(--cyan);
    padding: 5px 9px;
    border-radius: 99px
}

.price {
    font-size: 2.8rem;
    font-weight: 850;
    letter-spacing: -.06em
}

.price small {
    font-size: .9rem;
    color: var(--muted);
    font-weight: 500;
    letter-spacing: 0
}

.muted {
    color: var(--muted)
}

.check-list {
    list-style: none;
    padding: 0;
    margin: 24px 0
}

.check-list li {
    padding: 8px 0;
    color: #c7d4e9;
    font-size: .92rem
}

.check-list li:before {
    content: "✓";
    color: var(--green);
    font-weight: 900;
    margin-right: 10px
}

.form-card {
    padding: clamp(24px, 5vw, 42px);
    max-width: 510px;
    margin: auto
}

.form-control,
.form-select {
    background: #0a1324;
    border: 1px solid rgba(151, 180, 230, .2);
    color: var(--text);
    border-radius: 10px;
    padding: .78rem .9rem
}

.form-control:focus,
.form-select:focus {
    background: #0a1324;
    color: #fff;
    border-color: var(--cyan);
    box-shadow: 0 0 0 .2rem rgba(94, 231, 245, .12)
}

.form-control::placeholder {
    color: #6f819f
}

.form-label {
    color: #cbd8ec;
    font-weight: 650;
    font-size: .9rem
}

.form-text {
    color: #8496b5
}

.account-layout {
    display: grid;
    grid-template-columns: 245px 1fr;
    gap: 24px
}

.account-menu {
    padding: 18px;
    align-self: start
}

.account-menu a {
    display: flex;
    gap: 11px;
    padding: 11px 13px;
    border-radius: 10px;
    color: #aebbd3;
    font-weight: 650;
    font-size: .92rem
}

.account-menu a.active,
.account-menu a:hover {
    background: rgba(94, 231, 245, .1);
    color: var(--cyan)
}

.account-main {
    min-width: 0
}

.progress {
    height: 9px;
    background: #202d43;
    border-radius: 99px
}

.progress-bar {
    background: linear-gradient(90deg, var(--cyan), var(--blue));
    border-radius: 99px
}

.data-row {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 13px 0;
    border-bottom: 1px solid var(--line);
    font-size: .92rem
}

.data-row:last-child {
    border: 0
}

.badge-soft {
    background: rgba(67, 224, 174, .12);
    color: var(--green);
    border: 1px solid rgba(67, 224, 174, .2);
    padding: 5px 9px;
    border-radius: 99px;
    font-size: .72rem;
    font-weight: 800
}

.footer {
    border-top: 1px solid var(--line);
    padding: 34px 0;
    color: #8293b0;
    font-size: .85rem;
    background: #080d19
}

.footer a {
    color: #aebbd3
}

.footer a:hover {
    color: var(--cyan)
}

.notice {
    border: 1px solid rgba(94, 231, 245, .2);
    background: rgba(94, 231, 245, .06);
    padding: 14px 16px;
    border-radius: 12px;
    color: #b8d9e7;
    font-size: .86rem
}

.table-dark-custom {
    --bs-table-bg: transparent;
    --bs-table-color: #c8d6eb;
    --bs-table-border-color: var(--line)
}

.table-dark-custom th {
    color: #8498ba;
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    font-weight: 800
}

.platform-card {
    padding: 28px
}

.platform-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: rgba(94, 231, 245, .1);
    border: 1px solid rgba(94, 231, 245, .2);
    color: var(--cyan);
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 22px
}

.platform-card h4 {
    color: var(--text);
    margin-bottom: 12px
}

.platform-card p,
.faq-item p {
    color: var(--muted);
    line-height: 1.8;
    margin-bottom: 0
}

.faq-list {
    max-width: 850px
}

.faq-category {
    color: var(--cyan);
    margin-bottom: 16px
}

.faq-item {
    padding: 22px 24px;
    margin-bottom: 12px;
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 14px
}

.faq-item h6 {
    color: var(--text);
    margin-bottom: 10px;
    font-weight: 600
}

/* 首页横向交替展示卡片 */

.showcase-card {
    display: flex;
    align-items: center;
    gap: 50px;
    margin-bottom: 30px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: linear-gradient(145deg, rgba(18,30,52,.96), rgba(11,19,35,.96));
    transition: .25s;
}

.showcase-card:hover {
    transform: translateY(-4px);
    border-color: rgba(94,231,245,.38);
}

.showcase-card.reverse {
    flex-direction: row-reverse;
}

.showcase-card .feature-visual {
    position: relative;
    flex: 0 0 45%;
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 15px;
    background: linear-gradient(135deg,rgba(0,220,255,.13),rgba(100,70,255,.12));
}

.showcase-card .feature-visual > i {
    font-size: 75px;
    color: var(--cyan);
}

.showcase-card .feature-content {
    flex: 1;
}

.showcase-card .feature-content h3 {
    margin: 12px 0;
    font-size: 26px;
    font-weight: 800;
}

.showcase-card .feature-content p {
    color: var(--muted);
    line-height: 1.8;
    margin: 0;
}

.showcase-card .feature-tag {
    color: var(--cyan);
    font-size: 12px;
    letter-spacing: 3px;
}

.showcase-card .visual-orbit,
.showcase-card .security-ring {
    position: absolute;
    width: 180px;
    height: 180px;
    border: 1px solid rgba(0,220,255,.35);
    border-radius: 50%;
}

.showcase-card .visual-core {
    width: 85px;
    height: 85px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: rgba(0,220,255,.12);
    color: var(--cyan);
    font-size: 35px;
}

.showcase-card .visual-dot {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--cyan);
}

.showcase-card .dot-1 { top: 25%; left: 30%; }
.showcase-card .dot-2 { top: 65%; right: 25%; }
.showcase-card .dot-3 { bottom: 20%; left: 42%; }

.showcase-card .visual-devices {
    gap: 25px;
}

.showcase-card .visual-devices i:nth-child(2) {
    font-size: 55px;
}

.showcase-card .visual-devices i:nth-child(3) {
    font-size: 45px;
}

.showcase-card .security-ring {
    width: 150px;
    height: 150px;
}

.showcase-card .visual-security i {
    z-index: 1;
}

.showcase-card .visual-speed {
    flex-direction: column;
    gap: 12px;
}

.showcase-card .visual-speed i {
    margin-bottom: 5px;
}

.showcase-card .speed-line {
    width: 45%;
    height: 3px;
    border-radius: 5px;
    background: rgba(0,220,255,.4);
}

.showcase-card .speed-line:nth-child(3) {
    width: 35%;
}

.showcase-card .speed-line:nth-child(4) {
    width: 25%;
}

@media (max-width: 768px) {
    .showcase-card,
    .showcase-card.reverse {
        flex-direction: column;
        gap: 25px;
        padding: 20px;
    }

    .showcase-card .feature-visual {
        width: 100%;
        min-height: 200px;
        flex-basis: auto;
    }

    .showcase-card .feature-content h3 {
        font-size: 22px;
    }
}

@media(max-width:767.98px) {
    .hero {
        padding: 82px 0 60px
    }

    .hero-visual {
        min-height: 290px;
        margin-top: 28px
    }

    .orbit {
        width: 270px
    }

    .float-chip.one {
        right: 0
    }

    .float-chip.two {
        left: 0
    }

    .section {
        padding: 60px 0
    }

    .account-layout {
        grid-template-columns: 1fr
    }

    .account-menu {
        display: flex;
        overflow: auto;
        gap: 4px
    }

    .account-menu a {
        white-space: nowrap
    }

    .account-menu .menu-heading {
        display: none
    }
}