/* ============================================================
   main.css — 公共基础样式
   ============================================================ */

/* ===== Variables ===== */
:root {
    --bg: #f7f5f2;
    --text: #2c2825;
    --muted: #9a9490;
    --accent: #c45a2a;
    --border: #e4dfd9;
    --surface: #fff;
    --subtle: #f0ede9;
    --success: #4a9a5e;
    --error: #c45a2a;
    --radius: 12px;
}

/* ===== Reset ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

/* ===== Base ===== */
body {
    font-family: 'Noto Sans SC', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.8;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

/* ===== Layout ===== */
.wrap {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header ===== */
header {
    padding: 48px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    font-family: 'Instrument Serif', serif;
    font-size: 24px;
    letter-spacing: -0.02em;
}
.logo span { color: var(--accent); }
.login-link {
    font-size: 13px;
    color: var(--muted);
    border: 1px solid var(--border);
    padding: 6px 18px;
    border-radius: 100px;
    transition: all 0.2s;
    cursor: pointer;
}
.login-link:hover {
    color: var(--accent);
    border-color: var(--accent);
}

/* ===== Divider ===== */
.divider {
    height: 1px;
    background: var(--border);
}

/* ===== Page Title ===== */
.page-title {
    padding: clamp(60px, 10vh, 100px) 0 12px;
}
.page-title h1 {
    font-family: 'Instrument Serif', serif;
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 400;
    line-height: 1.25;
    letter-spacing: -0.03em;
}
.page-title h1 em {
    font-style: italic;
    color: var(--accent);
}
.page-subtitle {
    font-size: 13px;
    color: var(--muted);
    margin-top: 8px;
    letter-spacing: 0.04em;
}

/* ===== Section Heading (shared) ===== */
.section-heading {
    font-family: 'Instrument Serif', serif;
    font-size: 20px;
    font-weight: 400;
    margin-bottom: 20px;
    color: var(--muted);
}

/* ===== Footer ===== */
footer {
    padding: 32px 0;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}
footer p, footer a {
    font-size: 12px;
    color: var(--muted);
}
footer a:hover { color: var(--accent); }

/* ===== Scroll Reveal ===== */
.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.in {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Row Animation ===== */
@keyframes rowIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ===== Skeleton ===== */
.skeleton-bar {
    height: 13px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--subtle) 25%, #e8e5e0 50%, var(--subtle) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s ease-in-out infinite;
}
@keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { height: 4px; width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ===== Responsive ===== */
@media (max-width: 640px) {
    header { padding-top: 32px; }
}