:root {
    --bg: #08111d;
    --bg-soft: #0d1828;
    --panel: rgba(13, 24, 40, 0.82);
    --panel-solid: #0f1b2d;
    --line: rgba(255, 255, 255, 0.08);
    --line-strong: rgba(213, 180, 100, 0.3);
    --gold: #d5b464;
    --gold-soft: #f1ddb0;
    --text: #f4f7fb;
    --text-sub: #bfd0e1;
    --text-muted: #7f94a9;
    --shadow: 0 24px 64px rgba(0, 0, 0, 0.28);
    --radius-xl: 30px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --container: 1180px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    background:
        radial-gradient(circle at top left, rgba(68, 103, 163, 0.18), transparent 28%),
        linear-gradient(180deg, #09111c 0%, #050b14 45%, #09111c 100%);
}

a {
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    width: min(var(--container), calc(100% - 40px));
    margin: 0 auto;
}

.navbar {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    background: rgba(6, 11, 19, 0.42);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid transparent;
    transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.navbar.scrolled {
    background: rgba(6, 11, 19, 0.9);
    border-bottom-color: var(--line);
    box-shadow: 0 10px 32px rgba(0, 0, 0, 0.2);
}

.nav-inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.nav-brand {
    text-decoration: none;
}

.logo-wrap {
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    object-fit: contain;
}

.logo-text {
    font-size: 1.38rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--gold);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 26px;
    list-style: none;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-sub);
    font-size: 0.96rem;
    font-weight: 600;
}

.nav-menu a:hover {
    color: var(--gold-soft);
}

.nav-toggle {
    display: none;
    border: 0;
    background: none;
    color: var(--text);
    font-size: 1.8rem;
    cursor: pointer;
}

.hero {
    position: relative;
    min-height: 100vh;
    padding: 150px 0 96px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 18% 18%, rgba(66, 110, 182, 0.2), transparent 26%),
        radial-gradient(circle at 82% 18%, rgba(213, 180, 100, 0.1), transparent 18%),
        linear-gradient(180deg, rgba(6, 12, 20, 0.1) 0%, rgba(6, 12, 20, 0.62) 100%);
    pointer-events: none;
}

.hero-layout {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
    gap: 42px;
    align-items: center;
}

.eyebrow {
    display: inline-block;
    margin-bottom: 18px;
    color: var(--gold);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.hero-copy h1,
.section-head h2,
.statement-box h2,
.contact-copy h2 {
    letter-spacing: -0.04em;
    line-height: 1.08;
    font-weight: 900;
}

.hero-copy h1 {
    max-width: 760px;
    font-size: clamp(3rem, 5vw, 5.1rem);
    margin-bottom: 24px;
}

.hero-copy h1 span {
    color: var(--gold);
}

.hero-copy p,
.section-head p,
.card p,
.platform-item p,
.plan-card p,
.statement-box p,
.contact-copy p,
.contact-meta div {
    color: var(--text-sub);
    font-size: 1.02rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 54px;
    padding: 0 26px;
    border-radius: 999px;
    border: 1px solid transparent;
    text-decoration: none;
    font-size: 0.98rem;
    font-weight: 700;
    transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.22s ease, border-color 0.22s ease;
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--gold-soft), var(--gold));
    color: #151b24;
    box-shadow: 0 20px 48px rgba(213, 180, 100, 0.18);
}

.btn-secondary {
    background: transparent;
    border-color: rgba(213, 180, 100, 0.38);
    color: var(--gold-soft);
}

.hero-panel {
    display: flex;
    justify-content: flex-end;
}

.panel-card,
.card,
.platform-item,
.plan-card,
.statement-box,
.contact-form-wrap {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.panel-card {
    width: 100%;
    max-width: 420px;
    padding: 28px;
}

.panel-row + .panel-row {
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
}

.panel-row span {
    display: block;
    margin-bottom: 6px;
    color: var(--text-muted);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.panel-row strong {
    font-size: 1rem;
    line-height: 1.5;
}

.section {
    padding: 108px 0;
}

.section-muted {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.01));
}

.section-head {
    max-width: 760px;
    margin-bottom: 48px;
}

.section-head.narrow {
    max-width: 640px;
}

.section-head h2,
.statement-box h2,
.contact-copy h2 {
    font-size: clamp(2rem, 3.4vw, 3.4rem);
    margin-bottom: 14px;
}

.intro-grid,
.cards-grid,
.platform-list,
.plans-grid {
    display: grid;
    gap: 22px;
}

.intro-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cards-grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card,
.platform-item,
.plan-card {
    padding: 28px;
    border-radius: var(--radius-lg);
}

.card h3,
.platform-item h3,
.plan-card h3 {
    margin-bottom: 10px;
    font-size: 1.18rem;
}

.platform-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.plans-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.plan-card {
    min-height: 100%;
}

.plan-card.featured {
    border-color: var(--line-strong);
    background: linear-gradient(180deg, rgba(213, 180, 100, 0.11), rgba(15, 27, 45, 0.92));
}

.plan-type {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 0 12px;
    margin-bottom: 18px;
    border-radius: 999px;
    background: rgba(213, 180, 100, 0.08);
    border: 1px solid rgba(213, 180, 100, 0.16);
    color: var(--gold-soft);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.statement-box {
    padding: 40px;
    text-align: center;
}

.contact-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.94fr) minmax(0, 1.06fr);
    gap: 28px;
    align-items: start;
}

.contact-meta {
    margin-top: 24px;
    display: grid;
    gap: 10px;
}

.contact-form-wrap {
    padding: 30px;
}

.contact-form {
    display: grid;
    gap: 14px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text);
    font: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-muted);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: rgba(213, 180, 100, 0.38);
    box-shadow: 0 0 0 4px rgba(213, 180, 100, 0.08);
}

.consult-feedback {
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.92rem;
}

.consult-success {
    background: rgba(90, 180, 120, 0.12);
    border: 1px solid rgba(90, 180, 120, 0.25);
    color: #b8eac3;
}

.consult-error {
    background: rgba(230, 110, 110, 0.12);
    border: 1px solid rgba(230, 110, 110, 0.24);
    color: #ffb8b8;
}

.footer {
    padding: 44px 0 26px;
    border-top: 1px solid var(--line);
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.2fr 1fr auto;
    gap: 18px;
    align-items: center;
}

.footer h4 {
    margin-bottom: 8px;
    color: var(--gold);
    font-size: 1rem;
}

.footer p,
.footer a {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-links a {
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--gold-soft);
}

.footer-copy {
    text-align: right;
}

@media (max-width: 1080px) {
    .hero-layout,
    .contact-layout,
    .footer-inner {
        grid-template-columns: 1fr;
    }

    .hero-panel {
        justify-content: stretch;
    }

    .panel-card {
        max-width: none;
    }

    .intro-grid,
    .cards-grid-4,
    .plans-grid,
    .platform-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .footer-copy {
        text-align: left;
    }
}

@media (max-width: 820px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 76px;
        left: 0;
        right: 0;
        padding: 20px;
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        background: rgba(6, 11, 19, 0.96);
        border-bottom: 1px solid var(--line);
        transform: translateY(-130%);
        transition: transform 0.25s ease;
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .hero {
        padding-top: 126px;
    }

    .intro-grid,
    .cards-grid-4,
    .plans-grid,
    .platform-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .container {
        width: min(var(--container), calc(100% - 24px));
    }

    .hero-copy h1 {
        font-size: 2.55rem;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .panel-card,
    .card,
    .platform-item,
    .plan-card,
    .statement-box,
    .contact-form-wrap {
        padding: 22px;
    }

    .section {
        padding: 88px 0;
    }
}