/* ==========================================================================
   青柠量化 QingQuant · 专业量化产品官网 设计系统
   Design System v1.0 — 用于商业化升级的核心页面高保真原型
   落地时可整体迁移到 softselltheme/assets/css/ 并替换 --softsell-* 变量
   ========================================================================== */

:root {
    /* —— 品牌色：青柠绿（Lime） —— */
    --qq-lime-50:  #f7fee7;
    --qq-lime-100: #ecfccb;
    --qq-lime-300: #bef264;
    --qq-lime-400: #a3e635;   /* 主强调 */
    --qq-lime-500: #84cc16;   /* 主品牌 */
    --qq-lime-600: #65a30d;
    --qq-lime-700: #4d7c0f;

    /* —— 量化终端暗色底（Slate/Ink） —— */
    --qq-ink-950: #070b12;
    --qq-ink-900: #0a0e17;    /* Hero 背景 */
    --qq-ink-850: #0d1420;
    --qq-ink-800: #111a2b;    /* 面板 */
    --qq-ink-700: #182338;
    --qq-ink-600: #22304a;
    --qq-line-dark: rgba(148, 163, 184, 0.14);

    /* —— 亮色区中性色 —— */
    --qq-white: #ffffff;
    --qq-bg:    #ffffff;
    --qq-bg-soft: #f6f8fa;
    --qq-bg-muted: #eef2f6;
    --qq-border: #e3e8ef;
    --qq-border-strong: #cdd5df;

    --qq-text: #0b1220;
    --qq-text-2: #47536b;
    --qq-text-3: #8a97ab;
    --qq-text-inv: #e8edf5;
    --qq-text-inv-2: #93a2ba;

    /* —— 行情语义色：A股 红涨绿跌 —— */
    --qq-up:   #f0454b;   /* 涨 */
    --qq-down: #22b07d;   /* 跌 */
    --qq-flat: #8a97ab;

    /* —— 功能色 —— */
    --qq-info: #38bdf8;
    --qq-warn: #f5a524;
    --qq-danger: #ef4444;

    /* —— 渐变 —— */
    --qq-grad-lime: linear-gradient(135deg, #a3e635 0%, #22c55e 100%);
    --qq-grad-lime-cyan: linear-gradient(120deg, #a3e635 0%, #34d399 45%, #22d3ee 100%);
    --qq-grad-hero: radial-gradient(1200px 600px at 15% -10%, rgba(132,204,22,.20), transparent 60%),
                    radial-gradient(900px 500px at 90% 10%, rgba(34,211,238,.14), transparent 55%),
                    linear-gradient(180deg, #0a0e17 0%, #070b12 100%);

    /* —— 排版 —— */
    --qq-font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Microsoft YaHei", "Hiragino Sans GB", Roboto, sans-serif;
    --qq-mono: "JetBrains Mono", "SF Mono", "Cascadia Code", "Roboto Mono", ui-monospace,
               Consolas, monospace;

    /* —— 布局 —— */
    --qq-w: 1200px;
    --qq-w-wide: 1320px;
    --qq-pad: 24px;

    --qq-r-sm: 8px;
    --qq-r: 12px;
    --qq-r-lg: 16px;
    --qq-r-xl: 22px;
    --qq-r-full: 999px;

    --qq-sh-sm: 0 1px 2px rgba(15, 23, 42, .06);
    --qq-sh:    0 6px 20px -6px rgba(15, 23, 42, .12);
    --qq-sh-lg: 0 24px 60px -20px rgba(15, 23, 42, .28);
    --qq-sh-lime: 0 16px 40px -12px rgba(132, 204, 22, .45);

    --qq-tr: .25s cubic-bezier(.4, 0, .2, 1);
}

/* ---------------------------------- Reset --------------------------------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font-family: var(--qq-font);
    color: var(--qq-text);
    background: var(--qq-bg);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 { margin: 0; line-height: 1.15; letter-spacing: -.02em; font-weight: 800; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.mono { font-family: var(--qq-mono); font-feature-settings: "tnum" 1; }

/* --------------------------------- Layout --------------------------------- */
.qq-wrap { width: 100%; max-width: var(--qq-w); margin: 0 auto; padding: 0 var(--qq-pad); }
.qq-wrap-wide { max-width: var(--qq-w-wide); }
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.section-dark { background: var(--qq-ink-900); color: var(--qq-text-inv); }
.section-soft { background: var(--qq-bg-soft); }

.eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 13px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
    color: var(--qq-lime-600);
}
.section-dark .eyebrow { color: var(--qq-lime-400); }
.eyebrow::before { content: ""; width: 18px; height: 2px; background: currentColor; border-radius: 2px; }

.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head h2 { font-size: clamp(28px, 4vw, 44px); margin: 16px 0 14px; }
.section-head p { color: var(--qq-text-2); font-size: 18px; }
.section-dark .section-head p { color: var(--qq-text-inv-2); }

.text-grad {
    background: var(--qq-grad-lime-cyan);
    -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* --------------------------------- Buttons -------------------------------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 9px;
    font-weight: 700; font-size: 15px; padding: 13px 24px;
    border-radius: var(--qq-r-full); transition: var(--qq-tr); white-space: nowrap;
    border: 1.5px solid transparent;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--qq-grad-lime); color: #0a2c05; box-shadow: var(--qq-sh-lime); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 22px 48px -12px rgba(132,204,22,.6); }
.btn-dark { background: var(--qq-ink-800); color: #fff; border-color: var(--qq-ink-600); }
.btn-dark:hover { background: var(--qq-ink-700); transform: translateY(-2px); }
.btn-ghost { background: rgba(255,255,255,.06); color: #fff; border-color: rgba(255,255,255,.18); backdrop-filter: blur(6px); }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-outline { background: transparent; color: var(--qq-text); border-color: var(--qq-border-strong); }
.btn-outline:hover { border-color: var(--qq-lime-500); color: var(--qq-lime-700); }
.btn-lg { padding: 16px 32px; font-size: 16px; }
.btn-block { width: 100%; }

/* Pills / badges */
.pill {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 6px 13px; border-radius: var(--qq-r-full);
    font-size: 13px; font-weight: 600;
    background: var(--qq-lime-50); color: var(--qq-lime-700); border: 1px solid var(--qq-lime-100);
}
.pill-dark { background: rgba(163,230,53,.12); color: var(--qq-lime-300); border-color: rgba(163,230,53,.22); }
.pill-dot::before { content:""; width:7px; height:7px; border-radius:50%; background: var(--qq-lime-500); box-shadow: 0 0 0 3px rgba(132,204,22,.25); }

.tag {
    display: inline-flex; padding: 4px 10px; border-radius: 6px; font-size: 12px; font-weight: 600;
    background: var(--qq-bg-muted); color: var(--qq-text-2);
}
.tag-trend { background:#eff6ff; color:#2563eb; }
.tag-osc   { background:#fef3f2; color:#e5484d; }
.tag-vol   { background:#f0fdf4; color:#16a34a; }
.tag-combo { background:#faf5ff; color:#9333ea; }
.tag-adv   { background:#fffbeb; color:#d97706; }

/* --------------------------------- Header --------------------------------- */
.qq-header {
    position: sticky; top: 0; z-index: 1020;
    background: rgba(10, 14, 23, .72);
    backdrop-filter: saturate(160%) blur(14px);
    border-bottom: 1px solid var(--qq-line-dark);
}
.qq-header .qq-wrap { display: flex; align-items: center; gap: 28px; height: 68px; }
.qq-logo { display: flex; align-items: center; gap: 11px; color: #fff; }
.qq-logo-mark {
    width: 38px; height: 38px; border-radius: 11px; background: var(--qq-grad-lime);
    display: grid; place-items: center; font-weight: 900; color: #0a2c05; font-size: 20px;
    box-shadow: 0 6px 18px -4px rgba(132,204,22,.6);
}
.qq-logo b { font-size: 19px; letter-spacing: -.01em; }
.qq-logo span { display:block; font-size: 10px; letter-spacing: .28em; color: var(--qq-lime-400); font-weight: 700; }
.qq-nav { display: flex; gap: 6px; margin-left: 8px; }
.qq-nav a {
    padding: 8px 15px; border-radius: 9px; font-size: 15px; font-weight: 600;
    color: var(--qq-text-inv-2); transition: var(--qq-tr);
}
.qq-nav a:hover { color: #fff; background: rgba(255,255,255,.06); }
.qq-nav a.active { color: var(--qq-lime-400); }
.qq-header-cta { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.qq-header-cta .link { color: var(--qq-text-inv-2); font-weight: 600; font-size: 15px; }
.qq-header-cta .link:hover { color: #fff; }

/* Header on light pages */
.qq-header.light { background: rgba(255,255,255,.82); border-bottom: 1px solid var(--qq-border); }
.qq-header.light .qq-logo { color: var(--qq-text); }
.qq-header.light .qq-logo span { color: var(--qq-lime-600); }
.qq-header.light .qq-nav a { color: var(--qq-text-2); }
.qq-header.light .qq-nav a:hover { color: var(--qq-text); background: var(--qq-bg-muted); }
.qq-header.light .qq-nav a.active { color: var(--qq-lime-700); }
.qq-header.light .qq-header-cta .link { color: var(--qq-text-2); }
.qq-header.light .qq-header-cta .link:hover { color: var(--qq-text); }

/* --------------------------------- Footer --------------------------------- */
.qq-footer { background: var(--qq-ink-950); color: var(--qq-text-inv-2); padding: 72px 0 32px; }
.qq-footer-grid { display: grid; grid-template-columns: 1.5fr repeat(4, 1fr) auto; gap: 40px; }
.qq-footer h5 { color: #fff; font-size: 14px; margin-bottom: 18px; letter-spacing: .04em; }
.footer-qr { text-align: center; }
.footer-qr img { width: 116px; height: 116px; border-radius: 10px; background: #fff; padding: 5px; object-fit: contain; display: block; margin: 0 0 10px; }
.footer-qr .cap { font-size: 12px; color: var(--qq-text-inv-2); line-height: 1.5; max-width: 126px; }
.qq-footer a { display: block; padding: 6px 0; font-size: 14px; color: var(--qq-text-inv-2); }
.qq-footer a:hover { color: var(--qq-lime-400); }
.qq-footer-bottom {
    margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--qq-line-dark);
    display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
    font-size: 13px; color: var(--qq-text-3);
}

/* --------------------------------- Cards ---------------------------------- */
.card {
    background: #fff; border: 1px solid var(--qq-border); border-radius: var(--qq-r-lg);
    padding: 26px; transition: var(--qq-tr);
}
.card:hover { border-color: var(--qq-border-strong); box-shadow: var(--qq-sh); transform: translateY(-3px); }
.card-dark {
    background: linear-gradient(160deg, var(--qq-ink-800), var(--qq-ink-850));
    border: 1px solid var(--qq-line-dark); border-radius: var(--qq-r-lg); padding: 26px;
    transition: var(--qq-tr);
}
.card-dark:hover { border-color: rgba(163,230,53,.28); transform: translateY(-3px); }

/* --------------------------------- Stats ---------------------------------- */
.stat-num { font-family: var(--qq-mono); font-weight: 700; font-feature-settings:"tnum" 1; }
.up { color: var(--qq-up); }
.down { color: var(--qq-down); }
.flat { color: var(--qq-flat); }

/* Metric card */
.metric { text-align: left; }
.metric .k { font-size: 13px; color: var(--qq-text-3); font-weight: 600; }
.metric .v { font-family: var(--qq-mono); font-size: 30px; font-weight: 700; margin-top: 4px; letter-spacing: -.02em; }
.section-dark .metric .k { color: var(--qq-text-inv-2); }
.section-dark .metric .v { color: #fff; }

/* --------------------------------- Tables --------------------------------- */
.qq-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.qq-table th {
    text-align: left; font-size: 12px; letter-spacing: .04em; text-transform: uppercase;
    color: var(--qq-text-3); font-weight: 700; padding: 12px 16px; border-bottom: 1px solid var(--qq-border);
}
.qq-table td { padding: 14px 16px; border-bottom: 1px solid var(--qq-bg-muted); }
.qq-table tbody tr { transition: background .15s; }
.qq-table tbody tr:hover { background: var(--qq-bg-soft); }
.qq-table .num { font-family: var(--qq-mono); text-align: right; font-feature-settings:"tnum" 1; }

/* --------------------------- Utilities / motion --------------------------- */
.grid { display: grid; gap: 24px; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-2 { gap: 8px; } .gap-3 { gap: 12px; } .gap-4 { gap: 16px; }
.mt-2{margin-top:8px}.mt-3{margin-top:12px}.mt-4{margin-top:16px}.mt-6{margin-top:24px}.mt-8{margin-top:32px}
.muted { color: var(--qq-text-3); }
.center { text-align: center; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* Scoped grid backdrop for dark data panels */
.grid-bg {
    background-image:
        linear-gradient(var(--qq-line-dark) 1px, transparent 1px),
        linear-gradient(90deg, var(--qq-line-dark) 1px, transparent 1px);
    background-size: 42px 42px;
}

/* ------------------------ Product screenshot carousel --------------------- */
.qq-carousel { position: relative; }
.qq-carousel-track {
    display: flex; gap: 18px; overflow-x: auto; scroll-snap-type: x mandatory;
    scroll-behavior: smooth; -ms-overflow-style: none; scrollbar-width: none; padding-bottom: 4px;
}
.qq-carousel-track::-webkit-scrollbar { display: none; }
.qq-slide { flex: 0 0 100%; scroll-snap-align: center; }

/* App window chrome — drop real screenshots inside .qq-app-shot */
.qq-app-window {
    border-radius: 16px; overflow: hidden; border: 1px solid rgba(163,230,53,.18);
    background: linear-gradient(160deg, var(--qq-ink-800), var(--qq-ink-850));
    box-shadow: 0 40px 90px -30px rgba(0,0,0,.7);
}
.qq-app-bar { display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-bottom: 1px solid var(--qq-line-dark); }
.qq-app-bar i { width: 11px; height: 11px; border-radius: 50%; }
.qq-app-bar .t { margin-left: 8px; font-family: var(--qq-mono); font-size: 12px; color: var(--qq-text-inv-2); }
.qq-app-shot { position: relative; aspect-ratio: 16 / 10; background: var(--qq-ink-900); }
.qq-app-shot img { width: 100%; height: 100%; object-fit: cover; display: block; }
/* placeholder shown until a real screenshot <img> is dropped in */
.qq-app-ph { position: absolute; inset: 0; display: grid; place-items: center; text-align: center; padding: 20px; }
.qq-app-ph .grid-bg { position: absolute; inset: 0; opacity: .5; }
.qq-app-ph .lbl { position: relative; z-index: 2; }
.qq-app-ph .lbl .tag { background: rgba(163,230,53,.12); color: var(--qq-lime-300); border: 1px solid rgba(163,230,53,.25); }
.qq-app-ph .lbl h5 { color: #fff; font-size: 17px; margin: 12px 0 6px; }
.qq-app-ph .lbl p { color: var(--qq-text-inv-2); font-size: 12.5px; font-family: var(--qq-mono); }
.qq-slide-cap { display: flex; align-items: center; gap: 8px; margin-top: 12px; font-size: 13px; color: var(--qq-text-inv-2); }
.qq-slide-cap b { color: #fff; font-weight: 600; }

.qq-carousel-nav { position: absolute; top: 42%; width: 40px; height: 40px; border-radius: 50%;
    background: rgba(13,20,32,.85); border: 1px solid rgba(255,255,255,.14); color: #fff; display: grid; place-items: center;
    backdrop-filter: blur(6px); transition: var(--qq-tr); z-index: 5; }
.qq-carousel-nav:hover { background: var(--qq-lime-500); color: #0a2c05; }
.qq-carousel-nav svg { width: 18px; height: 18px; }
.qq-carousel-nav.prev { left: -14px; } .qq-carousel-nav.next { right: -14px; }
.qq-carousel-dots { display: flex; gap: 8px; justify-content: center; margin-top: 16px; }
.qq-carousel-dots button { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,.2); transition: var(--qq-tr); }
.qq-carousel-dots button.active { width: 24px; border-radius: 4px; background: var(--qq-lime-400); }

/* verifiable / real-data badges */
.verify {
    display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600;
    color: var(--qq-lime-300); background: rgba(163,230,53,.08);
    border: 1px solid rgba(163,230,53,.22); border-radius: var(--qq-r-full); padding: 5px 12px;
}
.verify svg { width: 13px; height: 13px; }
.verify-light { color: var(--qq-lime-700); background: var(--qq-lime-50); border-color: var(--qq-lime-100); }

/* --------------------------------- Responsive ----------------------------- */
@media (max-width: 960px) {
    .qq-nav { display: none; }
    .qq-footer-grid { grid-template-columns: 1fr 1fr; }
    .g-3, .g-4 { grid-template-columns: repeat(2, 1fr); }
    .section { padding: 64px 0; }
}
@media (max-width: 640px) {
    .g-2, .g-3, .g-4 { grid-template-columns: 1fr; }
    .qq-footer-grid { grid-template-columns: 1fr; }
}
.qq-logo-img { width: 36px; height: 36px; border-radius: 10px; object-fit: cover; }