/* 首页 */

/* ── Home ── */
.main-home {
    max-width: 960px;
    padding-top: 32px;
    padding-bottom: 72px;
}

.home-hero {
    text-align: center;
    padding: 64px 12px 48px;
    margin: 0 0 8px;
    border-bottom: 1px solid var(--border);
    background:
        radial-gradient(ellipse 70% 55% at 50% -10%, rgba(34, 211, 238, 0.12), transparent 55%);
}

.home-brand {
    margin: 0;
    font-size: clamp(2.8rem, 8vw, 4.2rem);
    font-weight: 800;
    letter-spacing: -0.035em;
    line-height: 1.02;
    color: var(--text);
}

.home-brand-en {
    margin: 10px 0 0;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--accent);
}

.home-slogan {
    margin: 28px 0 0;
    font-size: clamp(1.3rem, 3.2vw, 1.75rem);
    font-weight: 600;
    color: var(--text);
}

.home-lead {
    max-width: 560px;
    margin: 16px auto 0;
    font-size: 1.02rem;
    line-height: 1.65;
    color: var(--text-muted);
}

.home-cta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-top: 28px;
}

.home-trust {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px 18px;
    margin: 36px 0 0;
    padding: 0;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--text-muted);
}

.home-trust span {
    position: relative;
    padding: 0 0 0 14px;
}

.home-trust span::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 6px;
    height: 6px;
    margin-top: -3px;
    border-radius: 1px;
    background: var(--accent);
    opacity: 0.75;
}

.home-anim {
    opacity: 0;
    transform: translateY(12px);
    animation: home-fade-up 0.7s ease forwards;
}

.home-anim-delay-1 { animation-delay: 0.08s; }
.home-anim-delay-2 { animation-delay: 0.16s; }
.home-anim-delay-3 { animation-delay: 0.24s; }
.home-anim-delay-4 { animation-delay: 0.32s; }

@keyframes home-fade-up {
    to { opacity: 1; transform: translateY(0); }
}

.home-principles,
.home-audience,
.home-tools,
.home-stack,
.home-faq,
.home-closing {
    padding: 56px 0 8px;
}

.home-section-title {
    margin: 0;
    font-size: 1.45rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.home-section-desc {
    margin: 10px 0 0;
    max-width: 640px;
    color: var(--text-muted);
    font-size: 0.98rem;
    line-height: 1.6;
}

.home-principle-list {
    list-style: none;
    margin: 28px 0 0;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 28px;
}

.home-principle-list h3 {
    margin: 0 0 8px;
    font-size: 1.05rem;
    color: var(--accent);
}

.home-principle-list p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.55;
}

.home-audience-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 28px;
    margin-top: 28px;
}

.home-audience-item h3 {
    margin: 0 0 8px;
    font-size: 1.05rem;
}

.home-audience-item p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.55;
}

.home-tool-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 24px;
}

.home-tool {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px;
    text-decoration: none;
    color: inherit;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: rgba(30, 41, 59, 0.45);
    transition: border-color 0.18s, background 0.18s, transform 0.18s;
}

.home-tool:hover {
    border-color: rgba(34, 211, 238, 0.65);
    background: var(--accent-dim);
    transform: translateY(-2px);
}

.home-tool-wide { grid-column: 1 / -1; }

.home-tool-kicker {
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
}

.home-tool-name {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text);
}

.home-tool-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.home-stack-list {
    margin: 28px 0 0;
    padding: 0;
    display: grid;
    gap: 0;
    border-top: 1px solid var(--border);
}

.home-stack-list > div {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

.home-stack-list dt {
    margin: 0;
    font-weight: 650;
    color: var(--text);
}

.home-stack-list dd {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.55;
}

.home-faq-list {
    margin-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.home-faq-item {
    border: 1px solid var(--border);
    border-radius: 8px;
    background: rgba(12, 18, 34, 0.55);
    overflow: hidden;
}

.home-faq-item summary {
    cursor: pointer;
    list-style: none;
    padding: 14px 16px;
    font-weight: 600;
    color: var(--text);
}

.home-faq-item summary::-webkit-details-marker { display: none; }

.home-faq-item summary::after {
    content: '+';
    float: right;
    color: var(--accent);
    font-weight: 500;
}

.home-faq-item[open] summary::after { content: '–'; }

.home-faq-item p {
    margin: 0;
    padding: 0 16px 16px;
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.6;
    border-top: 1px solid transparent;
}

.home-closing {
    margin-top: 24px;
    padding: 40px 24px;
    text-align: center;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background:
        radial-gradient(ellipse 80% 100% at 50% 0%, rgba(34, 211, 238, 0.1), transparent 60%),
        rgba(30, 41, 59, 0.4);
}

.home-closing-title {
    margin: 0;
    font-size: clamp(1.25rem, 3vw, 1.55rem);
    font-weight: 700;
}

.home-closing-desc {
    max-width: 520px;
    margin: 12px auto 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.55;
}

.home-closing .home-cta { margin-top: 22px; }

@media (max-width: 720px) {
    .home-principle-list,
    .home-audience-grid,
    .home-tool-grid { grid-template-columns: 1fr; }
    .home-tool-wide { grid-column: auto; }
    .home-stack-list > div { grid-template-columns: 1fr; gap: 6px; }
}

@media (max-width: 640px) {
    .main-home { padding-top: 16px; }
    .home-hero {
        padding: 36px 4px 40px;
    }
    .home-principles,
    .home-audience,
    .home-tools,
    .home-stack,
    .home-faq { padding-top: 40px; }
}

@media (prefers-reduced-motion: reduce) {
    .home-anim {
        animation: none !important;
        opacity: 1;
        transform: none;
    }
}