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

:root {
    --bg: #0a0a0f;
    --bg-card: #12121a;
    --bg-card-hover: #1a1a25;
    --gold: #c9a84c;
    --gold-dim: #8b7332;
    --red: #c0392b;
    --red-dim: #922b21;
    --cyan: #5dade2;
    --green: #58d68d;
    --yellow: #f4d03f;
    --magenta: #bb8fce;
    --blue: #7fb3d3;
    --text: #e8e6e3;
    --text-dim: #8a8780;
    --border: #2a2a35;
    --font-cn: "Noto Serif SC", "Source Han Serif CN", "Songti SC", serif;
    --font-mono: "JetBrains Mono", "Fira Code", monospace;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-cn);
    line-height: 1.8;
    overflow-x: hidden;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 顶部装饰 ===== */
.top-ornament {
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 50% 30%, rgba(201,168,76,0.06) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 70%, rgba(93,173,226,0.03) 0%, transparent 40%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 700;
    color: var(--gold);
    letter-spacing: 0.15em;
    text-shadow: 0 0 40px rgba(201,168,76,0.3);
    margin-bottom: 12px;
}

.subtitle {
    font-size: clamp(1rem, 3vw, 1.5rem);
    color: var(--text-dim);
    letter-spacing: 0.3em;
    margin-bottom: 24px;
}

.desc {
    font-size: 1rem;
    color: var(--text-dim);
    line-height: 2;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.95rem;
    letter-spacing: 0.05em;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--gold);
    color: #0a0a0f;
    font-weight: 600;
}

.btn-primary:hover {
    background: #dbb85a;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(201,168,76,0.3);
}

.btn-ghost {
    border: 1px solid var(--gold-dim);
    color: var(--gold);
}

.btn-ghost:hover {
    border-color: var(--gold);
    background: rgba(201,168,76,0.08);
}

.scroll-hint {
    position: absolute;
    bottom: 40px;
    color: var(--text-dim);
    font-size: 0.85rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

/* ===== Section titles ===== */
.section-title {
    font-size: 1.8rem;
    color: var(--gold);
    text-align: center;
    margin-bottom: 40px;
    letter-spacing: 0.1em;
    position: relative;
}

.section-title::after {
    content: "";
    display: block;
    width: 60px;
    height: 2px;
    background: var(--gold-dim);
    margin: 12px auto 0;
}

/* ===== Intro ===== */
.intro {
    padding: 100px 0 80px;
}

.intro-text {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
    font-size: 1.05rem;
    color: var(--text-dim);
}

.roles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.role-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 28px 20px;
    text-align: center;
    transition: all 0.3s;
}

.role-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--gold-dim);
    transform: translateY(-4px);
}

.role-icon {
    font-size: 2rem;
    margin-bottom: 12px;
}

.role-card h3 {
    color: var(--gold);
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.role-card p {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.6;
}

/* ===== Flow ===== */
.flow {
    padding: 80px 0;
    background: linear-gradient(180deg, transparent, rgba(201,168,76,0.02), transparent);
}

.flow-chart {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.flow-step {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 14px 32px;
    text-align: center;
    min-width: 240px;
    transition: all 0.3s;
}

.flow-step:hover {
    border-color: var(--gold-dim);
}

.flow-step.highlight {
    border-color: var(--gold-dim);
    background: rgba(201,168,76,0.05);
}

.step-label {
    font-size: 1rem;
    color: var(--text);
}

.step-note {
    display: block;
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 4px;
}

.flow-arrow {
    color: var(--gold-dim);
    font-size: 0.9rem;
    line-height: 1;
}

/* ===== Cases ===== */
.cases {
    padding: 100px 0;
}

.cases-intro {
    text-align: center;
    color: var(--text-dim);
    margin-bottom: 60px;
    font-size: 0.9rem;
}

.case {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 40px;
    margin-bottom: 48px;
}

.case-header {
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.case-tag {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--gold);
    border: 1px solid var(--gold-dim);
    padding: 3px 10px;
    border-radius: 3px;
    margin-bottom: 12px;
    letter-spacing: 0.05em;
}

.case-title {
    font-size: 1.4rem;
    color: var(--text);
    margin-bottom: 10px;
}

.case-decree {
    font-size: 0.9rem;
    color: var(--red);
    padding-left: 12px;
    border-left: 3px solid var(--red-dim);
}

/* ===== Transcript messages ===== */
.transcript {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.msg {
    border-radius: 8px;
    padding: 20px;
    border-left: 3px solid var(--border);
}

.msg-label {
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 0.05em;
}

.msg-body {
    font-size: 0.9rem;
    line-height: 1.9;
    color: var(--text);
}

.msg-shiguan {
    border-left-color: var(--magenta);
    background: rgba(187,143,206,0.04);
}
.msg-shiguan .msg-label { color: var(--magenta); }

.msg-zhongshu {
    border-left-color: var(--cyan);
    background: rgba(93,173,226,0.04);
}
.msg-zhongshu .msg-label { color: var(--cyan); }

.msg-menxia {
    border-left-color: var(--green);
    background: rgba(88,214,141,0.04);
}
.msg-menxia .msg-label { color: var(--green); }

.msg-shangshu {
    border-left-color: var(--blue);
    background: rgba(127,179,211,0.04);
}
.msg-shangshu .msg-label { color: var(--blue); }

.msg-debate {
    border-left-color: var(--yellow);
    background: rgba(244,208,63,0.04);
}
.msg-debate .msg-label { color: var(--yellow); }

/* ===== Case result ===== */
.case-result {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.result-label {
    font-size: 0.75rem;
    color: var(--red);
    border: 1px solid var(--red-dim);
    padding: 2px 8px;
    border-radius: 3px;
    white-space: nowrap;
}

.result-text {
    color: var(--text);
    font-size: 0.95rem;
}

.case-detail-link {
    margin-top: 16px;
    text-align: right;
}

.case-detail-link .btn {
    font-size: 0.85rem;
    padding: 8px 20px;
}

/* ===== Quickstart ===== */
.quickstart {
    padding: 80px 0;
    background: linear-gradient(180deg, transparent, rgba(93,173,226,0.02), transparent);
}

.code-block {
    background: #0d0d14;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    max-width: 600px;
    margin: 0 auto;
}

.code-header {
    background: #1a1a25;
    padding: 8px 16px;
    font-size: 0.75rem;
    color: var(--text-dim);
    font-family: var(--font-mono);
    border-bottom: 1px solid var(--border);
}

.code-block pre {
    padding: 20px;
    overflow-x: auto;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--green);
    line-height: 1.8;
}

.quickstart-note {
    text-align: center;
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-top: 20px;
}

/* ===== Footer ===== */
.footer {
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--border);
}

.footer p {
    font-size: 0.85rem;
    color: var(--text-dim);
    margin-bottom: 8px;
}

.footer a {
    color: var(--gold-dim);
    text-decoration: none;
}

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

/* ===== Responsive ===== */
@media (max-width: 640px) {
    .case {
        padding: 24px 16px;
    }
    .roles {
        grid-template-columns: 1fr 1fr;
    }
    .case-result {
        flex-direction: column;
        align-items: flex-start;
    }
}