/* ============================================================
   CSS Variables
   ============================================================ */
:root {
    --bg:        #0d1117;
    --bg2:       #161b27;
    --surface:   rgba(22, 28, 42, 0.92);
    --surface2:  rgba(15, 20, 32, 0.80);
    --border:    rgba(255,255,255,0.07);
    --border2:   rgba(255,255,255,0.12);
    --text:      #e8eef8;
    --muted:     #7a8aaa;
    --accent:    #4ade9e;
    --accent2:   #17a96b;
    --red:       #f05c5c;
    --radius-sm: 12px;
    --radius:    18px;
    --radius-lg: 26px;
    --shadow:    0 8px 40px rgba(0,0,0,0.4);
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }

body.landing-body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    background: var(--bg);
    background-image:
        radial-gradient(ellipse 60% 40% at 10% 0%,   rgba(78,222,158,0.10) 0%, transparent 60%),
        radial-gradient(ellipse 50% 35% at 90% 100%,  rgba(50,100,255,0.12) 0%, transparent 55%);
    font-family: "PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; }

/* ============================================================
   Shell / Layout
   ============================================================ */
.landing-shell {
    max-width: 1320px;
    margin: 0 auto;
    padding: 20px 24px 80px;
}

/* ============================================================
   Header
   ============================================================ */
.landing-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border2);
    background: var(--surface);
    backdrop-filter: blur(20px);
    position: sticky;
    top: 16px;
    z-index: 100;
    box-shadow: var(--shadow);
}

.landing-brand {
    display: inline-flex;
    flex-direction: column;
    gap: 2px;
    color: var(--text);
}

.landing-brand strong {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: 0.02em;
    line-height: 1;
}

.landing-brand__eyebrow,
.landing-kicker {
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--accent);
}

.landing-header__actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ============================================================
   Buttons
   ============================================================ */
.landing-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    height: 42px;
    padding: 0 20px;
    border-radius: 999px;
    border: 1px solid var(--border2);
    color: var(--text);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    transition: opacity .18s, transform .18s, background .18s;
    cursor: pointer;
    background: rgba(255,255,255,0.04);
}

.landing-btn:hover { opacity: .85; transform: translateY(-1px); }
.landing-btn:active { transform: translateY(0); opacity: .7; }

.landing-btn--primary {
    border-color: transparent;
    background: linear-gradient(135deg, var(--accent), var(--accent2));
    color: #07180e;
    font-weight: 700;
}

.landing-btn--ghost { background: transparent; }

.landing-btn--large {
    height: 50px;
    padding: 0 28px;
    font-size: 16px;
    border-radius: var(--radius);
}

/* ============================================================
   Main
   ============================================================ */
.landing-main {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
}

/* ============================================================
   Hero
   ============================================================ */
.landing-hero {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 20px;
    padding: 36px 32px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background: var(--surface);
    backdrop-filter: blur(16px);
}

.landing-hero__copy {
    display: flex;
    flex-direction: column;
    gap: 18px;
    justify-content: center;
}

.landing-hero__visual {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.landing-hero h1 {
    margin: 0;
    font-size: clamp(28px, 3vw, 48px);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.02em;
}

.landing-subtitle {
    margin: 0;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.75;
}

.landing-cta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* ============================================================
   Stats
   ============================================================ */
.landing-meta {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.landing-stat {
    padding: 14px 16px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface2);
}

.landing-stat span {
    display: block;
    font-size: 11px;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 6px;
}

.landing-stat strong {
    display: block;
    font-size: 17px;
    font-weight: 700;
    word-break: break-all;
    line-height: 1.2;
}

/* ============================================================
   Notice
   ============================================================ */
.landing-notice {
    padding: 12px 16px;
    border-radius: var(--radius);
    border: 1px solid rgba(78,222,158,0.18);
    background: rgba(78,222,158,0.06);
    font-size: 13px;
    line-height: 1.7;
    color: var(--muted);
}

/* ============================================================
   Banner / Swiper
   ============================================================ */
.landing-banner-card {
    border-radius: var(--radius);
    overflow: hidden;
    flex: 1;
    aspect-ratio: 16 / 9;
    border: 1px solid var(--border);
    background: var(--surface2);
}

.landing-banner-card .swiper-container,
.landing-banner-card .swiper-wrapper,
.landing-banner-card .swiper-slide {
    width: 100%;
    height: 100%;
}

.landing-banner-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.landing-banner-empty {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 220px;
    padding: 24px;
    color: var(--muted);
    text-align: center;
    gap: 8px;
}

.landing-banner-empty strong {
    color: var(--text);
    font-size: 20px;
}

/* ============================================================
   Tickers
   ============================================================ */
.landing-tickers {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.landing-ticker-card {
    padding: 14px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface2);
}

.landing-ticker-card__name {
    font-size: 12px;
    color: var(--muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.landing-ticker-card strong {
    display: block;
    margin: 8px 0 4px;
    font-size: 20px;
    font-weight: 700;
}

/* ============================================================
   Trend
   ============================================================ */
.landing-trend { font-size: 13px; font-weight: 700; }
.landing-trend--up  { color: var(--accent); }
.landing-trend--down { color: var(--red); }

/* ============================================================
   Market / Article sections
   ============================================================ */
.landing-market,
.landing-article {
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background: var(--surface);
}

.landing-section-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 16px;
    margin-bottom: 18px;
}

.landing-section-head h2 {
    margin: 6px 0 0;
    font-size: 22px;
    font-weight: 700;
}

.landing-section-head p {
    margin: 0;
    font-size: 13px;
    color: var(--muted);
    text-align: right;
}

/* ============================================================
   Product Grid
   ============================================================ */
.landing-product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
}

.landing-product-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 16px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface2);
    color: var(--text);
    transition: border-color .2s, transform .2s;
}

.landing-product-card:not(.is-static):hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.landing-product-card__top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 8px;
}

.landing-product-card__top strong {
    display: block;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 3px;
}

.landing-product-card__top > div > span {
    font-size: 11px;
    color: var(--muted);
}

.landing-product-card__price {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.01em;
}

.landing-product-card__meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: 12px;
    color: var(--muted);
    border-top: 1px solid var(--border);
    padding-top: 10px;
}

/* ============================================================
   Article
   ============================================================ */
.landing-article__body {
    padding: 16px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: var(--surface2);
    line-height: 1.8;
    font-size: 14px;
    color: var(--text);
}

/* ============================================================
   Language Switch
   ============================================================ */
.landing-language-switch { position: relative; }

.landing-language-switch__button {
    height: 36px;
    padding: 0 14px;
    border-radius: 999px;
    border: 1px solid var(--border2);
    background: rgba(255,255,255,0.05);
    color: var(--text);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background .18s;
}

.landing-language-switch__button:hover { background: rgba(255,255,255,0.10); }

.landing-language-switch__menu {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 140px;
    background: #111827;
    border: 1px solid var(--border2);
    border-radius: var(--radius);
    padding: 6px;
    box-shadow: 0 16px 48px rgba(0,0,0,.5);
    z-index: 200;
}

.landing-language-switch__menu.is-open { display: block; }

.landing-language-switch__menu button {
    display: block;
    width: 100%;
    border: 0;
    background: transparent;
    color: var(--text);
    text-align: left;
    padding: 9px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
}

.landing-language-switch__menu button:hover { background: rgba(255,255,255,0.08); }

/* ============================================================
   Mobile sticky CTA bar
   ============================================================ */
.landing-mobile-cta {
    display: none;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    gap: 12px;
    padding: 12px 16px 22px;
    background: linear-gradient(180deg, transparent 0%, rgba(13,17,23,0.97) 28%);
    z-index: 300;
}

.landing-mobile-cta .landing-btn { flex: 1; }

/* ============================================================
   Responsive — Tablet  (1100px)
   ============================================================ */
@media (max-width: 1100px) {
    .landing-hero { grid-template-columns: 1fr 360px; }
    .landing-product-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================
   Responsive — Mobile  (768px)
   ============================================================ */
@media (max-width: 768px) {
    .landing-shell { padding: 12px 12px 90px; }

    .landing-header {
        position: static;
        padding: 12px 14px;
        border-radius: var(--radius);
        gap: 10px;
    }

    .landing-header__actions { gap: 8px; }
    .landing-header__actions .landing-btn { height: 36px; padding: 0 14px; font-size: 13px; }
    .landing-brand strong { font-size: 17px; }

    .landing-hero {
        grid-template-columns: 1fr;
        padding: 18px 16px;
        border-radius: var(--radius);
        gap: 16px;
    }

    .landing-hero__visual { order: -1; }
    .landing-hero h1 { font-size: 24px; }
    .landing-subtitle { font-size: 13px; }

    .landing-cta { gap: 10px; }
    .landing-cta .landing-btn--large {
        height: 46px;
        font-size: 15px;
        padding: 0 20px;
        flex: 1;
        border-radius: var(--radius);
    }

    .landing-meta { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .landing-stat { padding: 10px 12px; }
    .landing-stat span { font-size: 10px; margin-bottom: 4px; }
    .landing-stat strong { font-size: 13px; }

    .landing-banner-card { min-height: 170px; }

    .landing-tickers { grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .landing-ticker-card { padding: 10px 12px; }
    .landing-ticker-card strong { font-size: 16px; margin: 5px 0 3px; }

    .landing-market, .landing-article { padding: 14px; border-radius: var(--radius); }

    .landing-section-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        margin-bottom: 12px;
    }

    .landing-section-head p { text-align: left; }
    .landing-section-head h2 { font-size: 17px; }

    .landing-product-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
    .landing-product-card { padding: 12px; gap: 8px; }
    .landing-product-card__price { font-size: 18px; }
    .landing-product-card__top strong { font-size: 13px; }
    .landing-product-card__meta { font-size: 11px; gap: 3px; }

    .landing-main { gap: 12px; margin-top: 14px; }
    .landing-mobile-cta { display: flex; }
}

@media (max-width: 380px) {
    .landing-meta { grid-template-columns: 1fr 1fr; }
    .landing-tickers { grid-template-columns: 1fr 1fr; }
}