/* ===================================================================
   SharpCadViewer 产品页（独立落地页）
   来源：C:\Projects\SharpCadViewer\index.html
   说明：所有样式作用域在 .scv 内，类名统一 scv- 前缀，
        避免与 Bootstrap（.card/.btn/.badge）及 site.css 冲突。
   =================================================================== */

.scv {
    --scv-bg: #0F172A;
    --scv-panel: #172536;
    --scv-code: #0B1220;
    --scv-primary: #FF8A00;
    --scv-primary-strong: #E07900;
    --scv-primary-soft: rgba(255, 138, 0, .12);
    --scv-highlight: #FFC107;
    --scv-accent: #2E7DFF;
    --scv-accent-soft: rgba(46, 125, 255, .12);
    --scv-success: #20B486;
    --scv-text: #F8FAFC;
    --scv-text-2: #94A3B8;
    --scv-border: #334155;
    --scv-font: "Inter", "Segoe UI", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
    --scv-mono: "Cascadia Code", Consolas, "SFMono-Regular", monospace;
    --scv-radius: 14px;
    --scv-radius-sm: 10px;
    --scv-shadow: 0 6px 24px rgba(0, 0, 0, .35);
    background: var(--scv-bg);
    color: var(--scv-text);
    font-family: var(--scv-font);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

.scv *,
.scv *::before,
.scv *::after { box-sizing: border-box; }

/* 覆盖 Bootstrap reboot 的默认间距，保证与参考页一致 */
.scv h1,
.scv h2,
.scv h3,
.scv h4,
.scv p { margin: 0; }

.scv a { color: var(--scv-accent); text-decoration: none; }
.scv a:hover { color: #7FB0FF; }

.scv .scv-wrap {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

.scv-section {
    padding: 72px 0;
    border-bottom: 1px solid var(--scv-border);
    scroll-margin-top: 16px;
}
.scv-section:last-of-type { border-bottom: 0; }

/* ---------- 眉标 / 标题 ---------- */
.scv-kicker {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--scv-accent);
    margin-bottom: 10px;
}
.scv-section__title {
    font-size: 30px;
    font-weight: 800;
    letter-spacing: -.01em;
    margin-bottom: 8px;
    color: var(--scv-text);
}
.scv-section__sub {
    color: var(--scv-text-2);
    max-width: 680px;
    margin-bottom: 36px;
    font-size: 15px;
}

/* ---------- 页内子导航 ---------- */
.scv-subnav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--scv-panel);
    border-bottom: 1px solid var(--scv-border);
}
.scv-subnav__inner {
    display: flex;
    align-items: center;
    gap: 24px;
    height: 54px;
}
.scv-subnav__title {
    font-weight: 800;
    font-size: 15px;
    letter-spacing: .02em;
    color: var(--scv-text);
    white-space: nowrap;
}
.scv-subnav__links {
    display: flex;
    gap: 22px;
    margin-left: auto;
    flex-wrap: wrap;
}
.scv-subnav__links a {
    color: var(--scv-text-2);
    font-size: 14px;
    font-weight: 600;
}
.scv-subnav__links a:hover { color: var(--scv-text); }

/* ---------- Hero ---------- */
.scv-hero {
    background:
        radial-gradient(120% 120% at 85% -10%, rgba(46, 125, 255, .10), transparent 55%),
        var(--scv-bg);
    border-bottom: 1px solid var(--scv-border);
    padding: 72px 0 64px;
}
.scv-hero__grid {
    display: flex;
    gap: 48px;
    align-items: center;
    flex-wrap: wrap;
}
.scv-hero__logo { flex: 0 0 auto; }
.scv-hero__logo svg {
    width: 148px;
    height: 148px;
    filter: drop-shadow(0 10px 22px rgba(255, 138, 0, .18));
}
.scv-hero h1 {
    font-size: 46px;
    font-weight: 800;
    letter-spacing: -.02em;
    line-height: 1.1;
    color: var(--scv-text);
}
.scv-hero .scv-kicker { color: var(--scv-primary); }
.scv-tag {
    font-size: 19px;
    color: var(--scv-text-2);
    margin: 14px 0 22px;
    max-width: 560px;
}
.scv-badges {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 26px;
}
.scv-badge {
    font-size: 13px;
    font-weight: 600;
    padding: 6px 13px;
    border-radius: 999px;
    background: var(--scv-panel);
    border: 1px solid rgba(46, 125, 255, .35);
    color: var(--scv-text);
}
.scv-hero__cta {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

/* ---------- 按钮 ---------- */
.scv-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 15px;
    line-height: 1.2;
    padding: 13px 22px;
    border-radius: 13px;
    border: 1px solid var(--scv-border);
    color: var(--scv-text);
    background: transparent;
    cursor: pointer;
    transition: transform .12s ease, background .12s ease, box-shadow .12s ease;
}
.scv-btn--primary {
    background: var(--scv-primary);
    color: #0F172A;
    border-color: transparent;
    box-shadow: 0 8px 20px rgba(255, 138, 0, .28);
}
.scv-btn--primary:hover {
    background: #FF9D26;
    color: #0F172A;
    transform: translateY(-2px);
}
.scv-btn--primary:active { background: var(--scv-primary-strong); transform: translateY(0); }
.scv-btn--ghost { background: var(--scv-panel); color: var(--scv-text); }
.scv-btn--ghost:hover {
    background: rgba(255, 255, 255, .04);
    color: var(--scv-text);
    transform: translateY(-2px);
}
.scv-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(46, 125, 255, .45);
}

/* ---------- Promise（只读承诺） ---------- */
.scv-promise-wrap { padding-top: 36px; }
.scv-promise {
    display: flex;
    gap: 18px;
    align-items: center;
    flex-wrap: wrap;
    background: var(--scv-panel);
    border: 1px solid var(--scv-border);
    border-left: 5px solid var(--scv-success);
    border-radius: var(--scv-radius);
    padding: 22px 26px;
    box-shadow: var(--scv-shadow);
}
.scv-promise__ico { font-size: 30px; line-height: 1; }
.scv-promise strong { color: var(--scv-success); }
.scv-promise p { color: var(--scv-text-2); font-size: 15px; }

/* ---------- 三步 ---------- */
.scv-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}
.scv-step {
    background: var(--scv-panel);
    border: 1px solid var(--scv-border);
    border-radius: var(--scv-radius);
    padding: 24px 22px 22px;
    box-shadow: var(--scv-shadow);
    transition: border-color .15s ease, transform .15s ease;
}
.scv-step:hover {
    border-color: rgba(255, 138, 0, .45);
    transform: translateY(-4px);
}
.scv-step__num {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 17px;
    color: #0F172A;
    background: var(--scv-primary);
    margin-bottom: 14px;
}
.scv-step h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; color: var(--scv-text); }
.scv-step p { font-size: 14px; color: var(--scv-text-2); }
.scv-step__hint {
    margin-top: 12px;
    font-size: 13px;
    color: var(--scv-accent);
    font-weight: 600;
}

/* ---------- 功能卡 ---------- */
.scv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}
.scv-card {
    background: var(--scv-panel);
    border: 1px solid var(--scv-border);
    border-radius: var(--scv-radius);
    padding: 22px;
    box-shadow: var(--scv-shadow);
    transition: transform .15s ease, border-color .15s ease;
}
.scv-card:hover {
    transform: translateY(-4px);
    border-color: rgba(46, 125, 255, .45);
}
.scv-card__ico {
    width: 42px;
    height: 42px;
    border-radius: var(--scv-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    background: var(--scv-accent-soft);
    color: #7FB0FF;
    margin-bottom: 14px;
}
.scv-card h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; color: var(--scv-text); }
.scv-card p { font-size: 14px; color: var(--scv-text-2); }

/* ---------- 示例图纸 ---------- */
.scv-samples {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
.scv-sample {
    display: flex;
    gap: 12px;
    background: var(--scv-panel);
    border: 1px solid var(--scv-border);
    border-radius: var(--scv-radius-sm);
    padding: 13px 16px;
    box-shadow: var(--scv-shadow);
}
.scv-sample code {
    font-family: var(--scv-mono);
    font-size: 13px;
    color: var(--scv-text);
    font-weight: 700;
    flex: 0 0 auto;
}
.scv-sample span { font-size: 13px; color: var(--scv-text-2); }

/* ---------- 快捷键 ---------- */
.scv-keys {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}
.scv-keyrow {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 14px;
    background: var(--scv-panel);
    border: 1px solid var(--scv-border);
    border-radius: var(--scv-radius-sm);
    padding: 11px 16px;
    box-shadow: var(--scv-shadow);
}
.scv-keyrow__desc { font-size: 14px; color: var(--scv-text); }
.scv-kbd {
    font-family: var(--scv-mono);
    font-size: 12px;
    background: var(--scv-accent-soft);
    border: 1px solid var(--scv-border);
    border-bottom-width: 2px;
    border-radius: 7px;
    padding: 4px 9px;
    color: var(--scv-text);
    font-weight: 700;
    white-space: nowrap;
}

/* ---------- 注意事项 ---------- */
.scv-limits {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}
.scv-limit {
    background: var(--scv-panel);
    border: 1px solid var(--scv-border);
    border-left: 4px solid var(--scv-highlight);
    border-radius: var(--scv-radius-sm);
    padding: 16px 18px;
    box-shadow: var(--scv-shadow);
}
.scv-limit h4 { font-size: 15px; margin-bottom: 5px; color: var(--scv-text); }
.scv-limit p { font-size: 13px; color: var(--scv-text-2); }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
    .scv-grid,
    .scv-samples,
    .scv-keys,
    .scv-limits,
    .scv-steps { grid-template-columns: 1fr; }
    .scv-hero { padding: 48px 0; }
    .scv-hero h1 { font-size: 36px; }
    .scv-subnav__links { display: none; }
    .scv-section { padding: 48px 0; }
}