/* ============================================
   初中语文自学平台·青岛版 - 水墨古韵风格
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Ma+Shan+Zheng&family=Noto+Serif+SC:wght@400;600;700&display=swap');

:root {
    --primary: #7a6b55;
    --primary-light: #9a8b74;
    --primary-lighter: #c4b898;
    --primary-bg: #faf6ef;
    --accent-gold: #8b7355;
    --accent-gold-light: #a08b6a;
    --accent-green: #5a8a6e;
    --accent-green-dark: #3d6b4f;
    --surface: #fdfaf5;
    --surface-hover: #f5efe0;
    --text-primary: #3a3025;
    --text-secondary: #6b5a42;
    --text-muted: #9a8b74;
    --border: rgba(107,90,66,0.12);
    --border-light: rgba(107,90,66,0.06);
    --ink: #3a3025;
    --ink-light: #6b5a42;
    --vermillion: #b83a2b;
    --indigo: #2c4a6e;
    --jade: #5a8a6e;
    --shadow-sm: 0 2px 8px rgba(60,50,35,0.05);
    --shadow-md: 0 8px 30px rgba(60,50,35,0.08);
    --shadow-lg: 0 16px 48px rgba(60,50,35,0.10);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 10px;
    --radius-xl: 12px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Noto Serif SC', 'STSong', 'SimSun', serif;
    background: linear-gradient(160deg, #faf6ef 0%, #f5efe0 40%, #f0e8d5 70%, #faf6ef 100%);
    min-height: 100vh;
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Subtle rice-paper texture overlay */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    opacity: 0.08;
    background-image:
        url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='5' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 3px,
            rgba(120,100,70,0.018) 3px,
            rgba(120,100,70,0.018) 4px
        ),
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 5px,
            rgba(120,100,70,0.012) 5px,
            rgba(120,100,70,0.012) 6px
        );
    background-size: 400px 400px, 100% 100%, 100% 100%;
}

/* ============ Login Screen ============ */
.yw-login-screen {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: linear-gradient(150deg, #f5efe0 0%, #ede5d3 30%, #f5efe0 60%, #e8dfc8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.35s ease;
}
.yw-login-screen.visible { opacity: 1; }
.yw-login-screen > .yw-login-box {
    background: rgba(253,250,245,0.85);
    backdrop-filter: blur(24px) saturate(1.4);
    -webkit-backdrop-filter: blur(24px) saturate(1.4);
    border: 1px solid rgba(139,105,20,0.15);
    border-radius: 12px;
    padding: 44px 40px 36px;
    width: 400px;
    max-width: 90vw;
    text-align: center;
    box-shadow: 0 24px 64px rgba(60,50,35,0.10);
    transform: translateY(40px) scale(0.96);
    opacity: 0;
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.35s ease;
    position: relative;
}
.yw-login-screen > .yw-login-box::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent-gold), var(--accent-gold-light), var(--accent-gold), transparent);
    border-radius: 12px 12px 0 0;
}
.yw-login-screen.visible > .yw-login-box {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.yw-login-logo {
    width: 68px; height: 68px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
    margin: 0 auto 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(139,105,20,0.15);
    font-size: 28px;
}
.yw-login-title {
    color: var(--text-primary);
    font-size: clamp(1.12rem, 4.6vw, 1.5rem);
    font-weight: 700;
    letter-spacing: clamp(1px, 0.9vw, 4px);
    white-space: nowrap;
    margin-bottom: 6px;
    font-family: 'Ma Shan Zheng', 'STXingkai', 'KaiTi', 'STKaiti', serif;
}
.yw-login-subtitle {
    color: var(--text-muted);
    font-size: 0.82rem;
    margin-bottom: 28px;
    line-height: 1.6;
}

.yw-form-group {
    text-align: left;
    margin-bottom: 16px;
}
.yw-form-group label {
    color: var(--text-secondary);
    font-size: 0.78rem;
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
}
.yw-form-input {
    width: 100%;
    padding: 12px 16px;
    background: rgba(253,250,245,0.8);
    border: 1px solid rgba(139,105,20,0.2);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.92rem;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
    font-family: inherit;
}
.yw-form-input::placeholder { color: var(--text-muted); }
.yw-form-input:focus {
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 3px rgba(139,105,20,0.08);
}

.yw-checkbox-row {
    text-align: left;
    margin-bottom: 10px;
}
.yw-checkbox-row label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.78rem;
    cursor: pointer;
    user-select: none;
}
.yw-checkbox-row input[type="checkbox"] { accent-color: var(--accent-gold); }

.yw-login-error {
    color: var(--vermillion);
    font-size: 0.78rem;
    min-height: 18px;
    margin-bottom: 12px;
}

.yw-btn-primary {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.98rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    letter-spacing: 2px;
    font-family: inherit;
}
.yw-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(139,105,20,0.20);
}
.yw-btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

.yw-btn-teacher-toggle {
    margin-top: 18px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.84rem;
    cursor: pointer;
    text-decoration: underline;
    text-underline-offset: 4px;
    transition: color var(--transition);
    font-family: inherit;
}
.yw-btn-teacher-toggle:hover { color: var(--accent-gold-light); }

.yw-btn-green {
    width: 100%;
    padding: 13px;
    background: linear-gradient(135deg, var(--accent-green), var(--accent-green-dark));
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.96rem;
    font-weight: 700;
    cursor: pointer;
    letter-spacing: 1px;
    transition: opacity var(--transition);
    font-family: inherit;
}
.yw-btn-green:disabled { opacity: 0.5; cursor: not-allowed; }
.yw-btn-green:hover { opacity: 0.9; }

/* Teacher login modal overlay */
.yw-teacher-modal {
    position: fixed;
    inset: 0;
    z-index: 100000;
    background: rgba(60,50,35,0.3);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.yw-teacher-modal.show { display: flex; }
.yw-teacher-modal .yw-teacher-box {
    position: relative;
    background: rgba(253,250,245,0.95);
    border: 1px solid rgba(139,105,20,0.15);
    border-radius: 10px;
    padding: 34px 30px 30px;
    width: 360px;
    max-width: 92vw;
    box-shadow: 0 24px 64px rgba(60,50,35,0.12);
}
.yw-teacher-modal .yw-teacher-box::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--vermillion), var(--accent-gold), var(--vermillion), transparent);
    border-radius: 10px 10px 0 0;
}
.yw-teacher-modal .close-btn {
    position: absolute;
    right: 16px; top: 14px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 22px;
    cursor: pointer;
    line-height: 1;
}
.yw-teacher-modal h3 {
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 6px;
    text-align: center;
    font-family: 'Ma Shan Zheng', 'STXingkai', 'KaiTi', 'STKaiti', serif;
    letter-spacing: 2px;
}
.yw-teacher-modal .modal-desc {
    color: var(--text-muted);
    font-size: 0.8rem;
    line-height: 1.6;
    margin-bottom: 22px;
    text-align: center;
}

/* Change password box */
.yw-change-password {
    display: none;
    text-align: left;
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid rgba(184,134,11,0.12);
}

/* ============ Main Page Header ============ */
.yw-header {
    background: linear-gradient(135deg, #f5efe0, #ede5d3, #f5efe0);
    padding: 52px 24px 44px;
    color: var(--text-primary);
    text-align: center;
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid rgba(139,105,20,0.1);
}
.yw-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(139,105,20,0.04), transparent);
    animation: ywHeaderRotate 30s linear infinite;
    pointer-events: none;
    z-index: 0;
}
@keyframes ywHeaderRotate { to { transform: rotate(360deg); } }

.yw-header h1 {
    position: relative;
    font-size: 2.2rem;
    font-weight: 700;
    letter-spacing: 5px;
    color: var(--text-primary);
    font-family: 'Ma Shan Zheng', 'STXingkai', 'KaiTi', 'STKaiti', serif;
}

.yw-header .yw-subtitle {
    position: relative;
    color: var(--text-muted);
    margin-top: 8px;
    font-size: 0.95rem;
    letter-spacing: 6px;
}
.yw-header .yw-version {
    position: absolute;
    left: 24px; bottom: 12px;
    font-size: 12px;
    color: var(--text-muted);
    opacity: 0.5;
}

/* User corner */
.yw-user-corner {
    position: fixed;
    top: 16px; right: 20px;
    z-index: 1000;
}
.yw-login-trigger {
    background: rgba(139,105,20,0.08);
    color: var(--text-secondary);
    border: 1px solid rgba(139,105,20,0.2);
    padding: 8px 22px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    transition: background var(--transition);
}
.yw-login-trigger:hover { background: rgba(139,105,20,0.15); }

.yw-user-avatar {
    width: 40px; height: 40px;
    border-radius: 50%;
    background: rgba(139,105,20,0.1);
    color: var(--accent-gold);
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    position: relative;
}
.yw-user-dropdown {
    display: none;
    position: absolute;
    top: 48px; right: 0;
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    padding: 12px;
    z-index: 20;
    border: 1px solid var(--border);
}
.yw-user-dropdown.show { display: block; }
.yw-user-dropdown .yw-ud-info {
    padding: 8px;
    border-bottom: 1px solid rgba(139,105,20,0.1);
    margin-bottom: 4px;
}
.yw-user-dropdown .yw-ud-name { font-weight: 600; font-size: 14px; color: var(--text-primary); }
.yw-user-dropdown .yw-ud-detail { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.yw-user-dropdown a {
    display: block;
    padding: 10px 8px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: background var(--transition);
}
.yw-user-dropdown a:hover { background: var(--primary-bg); color: var(--accent-gold); }
.yw-user-dropdown a.logout { color: var(--vermillion); }

/* ============ Container ============ */
.yw-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 36px 24px 60px;
    position: relative;
    z-index: 1;
}

.yw-section-title {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Ma Shan Zheng', 'STXingkai', 'KaiTi', 'STKaiti', serif;
    letter-spacing: 2px;
}
.yw-section-title::before {
    content: '';
    width: 4px; height: 20px;
    background: linear-gradient(180deg, var(--vermillion), var(--accent-gold));
    border-radius: 2px;
}

/* ============ Feature Cards ============ */
.yw-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}
.yw-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 28px;
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    border: 1px solid var(--border);
}
.yw-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}
.yw-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
}
.yw-card.dark {
    background: linear-gradient(145deg, #f5efe0, #ede5d3, #f5efe0);
    border-color: rgba(139,105,20,0.15);
}
.yw-card.dark:hover { box-shadow: 0 12px 36px rgba(139,105,20,0.10); }

.yw-card .card-stripe-metaverse { background: linear-gradient(90deg, var(--accent-gold), var(--accent-gold-light)); }
.yw-card .card-stripe-diagnostic { background: linear-gradient(90deg, var(--vermillion), var(--accent-gold)); }
.yw-card::before { height: 3px; }
.yw-card.metaverse::before { background: linear-gradient(90deg, var(--accent-gold), var(--accent-gold-light)); }
.yw-card.diagnostic::before { background: linear-gradient(90deg, var(--vermillion), var(--accent-gold)); }

.yw-card .card-icon { font-size: 2.2rem; margin-bottom: 14px; }
.yw-card .card-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; font-family: 'Ma Shan Zheng', 'STXingkai', 'KaiTi', 'STKaiti', serif; letter-spacing: 1px; }
.yw-card.dark .card-title { color: var(--text-primary); }
.yw-card .card-desc { font-size: 14px; line-height: 1.65; color: var(--text-secondary); }
.yw-card.dark .card-desc { color: var(--text-muted); }

.yw-card .card-badge {
    position: absolute;
    top: 16px; right: 16px;
    padding: 4px 12px;
    border-radius: 8px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.5px;
}
.badge-live { background: #e8f5e9; color: var(--accent-green-dark); }
.badge-new { background: #fef3c7; color: var(--accent-gold); }
.yw-card.dark .badge-live { background: rgba(90,138,110,0.1); color: var(--accent-green-dark); }
.yw-card.dark .badge-new { background: rgba(139,105,20,0.1); color: var(--accent-gold); }

.yw-card .card-action {
    margin-top: 18px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    transition: gap var(--transition);
}
.yw-card:hover .card-action { gap: 10px; }
.yw-card.metaverse .card-action { color: var(--accent-gold); }
.yw-card.diagnostic .card-action { color: var(--vermillion); }

/* ============ Top Bar (diagnostic page) ============ */
.yw-topbar {
    background: linear-gradient(135deg, #f5efe0, #ede5d3);
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--text-primary);
    border-bottom: 1px solid rgba(139,105,20,0.1);
}
.yw-topbar .back-btn {
    background: rgba(139,105,20,0.08);
    border: 1px solid rgba(139,105,20,0.2);
    color: var(--text-secondary);
    padding: 7px 18px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    transition: background var(--transition);
}
.yw-topbar .back-btn:hover { background: rgba(139,105,20,0.15); }
.yw-topbar .page-title { font-weight: 600; font-size: 15px; font-family: 'Ma Shan Zheng', 'STXingkai', 'KaiTi', 'STKaiti', serif; letter-spacing: 2px; color: var(--text-primary); }
.yw-topbar .timer {
    font-size: 18px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    letter-spacing: 1px;
    color: var(--accent-gold);
}
.yw-topbar .timer.warning { color: var(--vermillion); animation: ywPulse 1s infinite; }
@keyframes ywPulse { 50% { opacity: 0.5; } }

/* Progress bar */
.yw-progress {
    height: 3px;
    background: rgba(139,105,20,0.1);
}
.yw-progress .fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-gold-light));
    transition: width 0.4s ease;
}

/* ============ Diagnostic Page Components ============ */
.yw-main {
    max-width: 800px;
    margin: 0 auto;
    padding: 32px 24px;
    position: relative;
    z-index: 1;
}

.yw-start-screen {
    text-align: center;
    padding: 48px 20px;
}
.yw-start-screen .icon { font-size: 3.5rem; margin-bottom: 18px; }
.yw-start-screen h1 { font-size: 1.7rem; font-weight: 700; color: var(--primary); margin-bottom: 10px; font-family: 'Ma Shan Zheng', 'STXingkai', 'KaiTi', 'STKaiti', serif; letter-spacing: 3px; }
.yw-start-screen .desc {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 14.5px;
    max-width: 480px;
    margin: 0 auto 30px;
}

.yw-info-row {
    display: flex;
    gap: 14px;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}
.yw-info-item {
    background: var(--surface);
    padding: 16px 24px;
    border-radius: var(--radius-md);
    text-align: center;
    min-width: 130px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
.yw-info-item .val { font-size: 1.3rem; font-weight: 700; color: var(--accent-gold); }
.yw-info-item .label { font-size: 12px; color: var(--text-muted); margin-top: 3px; }

.yw-grade-select {
    margin-bottom: 28px;
}
.yw-grade-select label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-right: 10px;
}
.yw-grade-select select {
    padding: 10px 18px;
    border: 1.5px solid rgba(139,105,20,0.25);
    border-radius: var(--radius-md);
    font-size: 14px;
    outline: none;
    background: var(--surface);
    cursor: pointer;
    min-width: 160px;
    font-family: inherit;
    transition: border-color var(--transition);
    color: var(--text-primary);
}
.yw-grade-select select:focus { border-color: var(--accent-gold); }

.yw-start-btn {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
    color: var(--ink);
    border: none;
    padding: 16px 48px;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    font-family: inherit;
    letter-spacing: 2px;
}
.yw-start-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(184,134,11,0.3);
}
.yw-start-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; }

/* Question card */
.yw-question-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    position: relative;
}
.yw-question-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--vermillion), var(--accent-gold), var(--vermillion));
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.yw-question-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}
.yw-question-header .q-num { font-size: 13px; color: var(--accent-gold); font-weight: 600; }
.yw-question-header .q-cat {
    font-size: 12px;
    padding: 4px 12px;
    background: var(--primary-bg);
    color: var(--accent-gold);
    border-radius: var(--radius-sm);
    font-weight: 600;
}
.yw-question-text {
    font-size: 15.5px;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 22px;
    white-space: pre-wrap;
}

.yw-options { display: flex; flex-direction: column; gap: 10px; }
.yw-option {
    padding: 14px 18px;
    border: 1.5px solid rgba(139,105,20,0.15);
    border-radius: var(--radius-md);
    background: var(--surface);
    cursor: pointer;
    font-size: 14.5px;
    text-align: left;
    transition: all var(--transition);
    color: var(--text-primary);
    line-height: 1.6;
    font-family: inherit;
}
.yw-option:hover { border-color: var(--primary-lighter); background: var(--primary-bg); }
.yw-option.selected { border-color: var(--accent-gold); background: var(--primary-bg); font-weight: 600; color: var(--primary); }
.yw-option.correct { border-color: var(--accent-green); background: #f0f7f2; color: var(--accent-green-dark); }
.yw-option.wrong { border-color: var(--vermillion); background: #fdf2f0; color: var(--vermillion); }
.yw-option:disabled { cursor: default; }

.yw-explanation {
    margin-top: 20px;
    padding: 16px 20px;
    background: #faf8f0;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent-gold);
    display: none;
}
.yw-explanation.show { display: block; }
.yw-explanation .exp-title { font-weight: 600; color: var(--accent-gold); margin-bottom: 6px; font-size: 13px; }
.yw-explanation .exp-text { font-size: 14px; color: var(--text-secondary); line-height: 1.7; white-space: pre-wrap; }

.yw-next-btn {
    margin-top: 24px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
    color: var(--ink);
    border: none;
    padding: 13px 30px;
    border-radius: var(--radius-md);
    font-size: 14.5px;
    font-weight: 600;
    cursor: pointer;
    display: none;
    font-family: inherit;
    transition: opacity var(--transition);
    letter-spacing: 1px;
}
.yw-next-btn.show { display: inline-block; }
.yw-next-btn:hover { opacity: 0.9; }

/* Loading */
.yw-loading {
    text-align: center;
    padding: 56px 20px;
    display: none;
}
.yw-loading.show { display: block; }
.yw-spinner {
    width: 44px; height: 44px;
    border: 3px solid rgba(139,105,20,0.15);
    border-top-color: var(--accent-gold);
    border-radius: 50%;
    animation: ywSpin 0.75s linear infinite;
    margin: 0 auto 18px;
}
@keyframes ywSpin { to { transform: rotate(360deg); } }
.yw-loading .text { color: var(--text-muted); font-size: 14.5px; }

/* Result */
.yw-result-header {
    text-align: center;
    padding: 36px 20px;
}
.yw-result-header .icon { font-size: 3rem; margin-bottom: 10px; }
.yw-result-header h1 { font-size: 1.5rem; color: var(--primary); margin-bottom: 6px; font-family: 'Ma Shan Zheng', 'STXingkai', 'KaiTi', 'STKaiti', serif; letter-spacing: 2px; }
.yw-result-header .sub { color: var(--text-muted); font-size: 14px; }

.yw-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 14px;
    margin: 22px 0;
}
.yw-stat {
    background: var(--surface);
    border-radius: var(--radius-md);
    padding: 18px;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
.yw-stat .val { font-size: 1.5rem; font-weight: 700; color: var(--accent-gold); }
.yw-stat .label { font-size: 12px; color: var(--text-muted); margin-top: 3px; }

.yw-report {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: 28px;
    margin-top: 22px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    position: relative;
}
.yw-report::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent-gold), var(--accent-gold-light), var(--accent-gold), transparent);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.yw-report h3 {
    font-size: 1.05rem;
    color: var(--primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Ma Shan Zheng', 'STXingkai', 'KaiTi', 'STKaiti', serif;
    letter-spacing: 1px;
}
.yw-report .content {
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-secondary);
    white-space: pre-wrap;
}
.yw-report .stream-cursor {
    display: inline-block;
    width: 2px; height: 15px;
    background: var(--accent-gold);
    animation: ywBlink 0.7s infinite;
    vertical-align: middle;
    margin-left: 2px;
}
@keyframes ywBlink { 50% { opacity: 0; } }

.yw-actions {
    text-align: center;
    margin-top: 26px;
}
.yw-actions button {
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    margin: 0 8px;
    border: none;
    font-family: inherit;
    transition: opacity var(--transition);
    letter-spacing: 1px;
}
.yw-actions button:hover { opacity: 0.85; }
.yw-btn-retry { background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light)); color: var(--ink); }
.yw-btn-back { background: var(--primary-bg); color: var(--accent-gold); border: 1px solid rgba(139,105,20,0.25) !important; }

/* Footer */
.yw-footer {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 13px;
    position: relative;
    z-index: 1;
}

/* ============================================
   统一组件层 v1.1 —— 水墨文房设计系统
   供全部子系统共用：学段主题 / 按钮 / 徽章 / 弹窗 / 卡片条纹
   ============================================ */

/* ---- 学段主题：初中青瓷绿 / 高中黛蓝 ---- */
.yw-theme-junior {
    --stage: var(--jade);
    --stage-dark: var(--accent-green-dark);
    --stage-bg: #eef5f0;
    --stage-border: rgba(90,138,110,0.3);
    --stage-soft: rgba(90,138,110,0.1);
}
.yw-theme-senior {
    --stage: var(--indigo);
    --stage-dark: #1d3a55;
    --stage-bg: #edf1f6;
    --stage-border: rgba(44,74,110,0.3);
    --stage-soft: rgba(44,74,110,0.1);
}

/* ---- 统一按钮体系 ---- */
.yw-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 11px 26px;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), border-color var(--transition);
    line-height: 1.4;
}
.yw-btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; box-shadow: none !important; }
.yw-btn-primary {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
    color: #fff;
}
.yw-btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(139,105,20,0.22);
}
.yw-btn-ghost {
    background: rgba(139,105,20,0.06);
    color: var(--accent-gold);
    border: 1px solid rgba(139,105,20,0.3);
}
.yw-btn-ghost:hover:not(:disabled) { background: rgba(139,105,20,0.14); }
.yw-btn-danger {
    background: linear-gradient(135deg, var(--vermillion), #cf5243);
    color: #fff;
}
.yw-btn-danger:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(184,58,43,0.22);
}
.yw-btn-stage {
    background: linear-gradient(135deg, var(--stage, var(--accent-gold)), var(--stage-dark, var(--accent-gold-light)));
    color: #fff;
}
.yw-btn-stage:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(60,50,35,0.18);
}
.yw-btn-sm { padding: 7px 16px; font-size: 12.5px; border-radius: var(--radius-sm); }

/* ---- 统一徽章 ---- */
.yw-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 11px;
    border-radius: 20px;
    font-size: 11.5px;
    font-weight: 600;
    letter-spacing: 0.5px;
    line-height: 1.6;
    white-space: nowrap;
}
.yw-badge-gold { background: rgba(139,105,20,0.12); color: var(--accent-gold); }
.yw-badge-red { background: rgba(184,58,43,0.1); color: var(--vermillion); }
.yw-badge-green { background: rgba(90,138,110,0.12); color: var(--accent-green-dark); }
.yw-badge-blue { background: rgba(44,74,110,0.1); color: var(--indigo); }
.yw-badge-gray { background: rgba(107,90,66,0.08); color: var(--text-muted); }
.yw-badge-stage { background: var(--stage-soft, rgba(139,105,20,0.12)); color: var(--stage, var(--accent-gold)); }

/* ---- 统一弹窗（水墨毛玻璃） ---- */
.yw-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(60,50,35,0.35);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.yw-modal.show { display: flex; }
.yw-modal-box {
    position: relative;
    background: rgba(253,250,245,0.96);
    border: 1px solid rgba(139,105,20,0.15);
    border-radius: var(--radius-lg);
    box-shadow: 0 24px 64px rgba(60,50,35,0.16);
    width: 480px;
    max-width: 94vw;
    max-height: 86vh;
    overflow-y: auto;
    padding: 30px 28px 26px;
    animation: ywModalIn 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}
.yw-modal-box::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--accent-gold), var(--accent-gold-light), var(--accent-gold), transparent);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
@keyframes ywModalIn {
    from { opacity: 0; transform: translateY(24px) scale(0.97); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
.yw-modal-title {
    font-family: 'Ma Shan Zheng', 'STXingkai', 'KaiTi', 'STKaiti', serif;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 6px;
}
.yw-modal-sub {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 18px;
}
.yw-modal-close {
    position: absolute;
    right: 14px; top: 12px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 20px;
    cursor: pointer;
    line-height: 1;
    transition: color var(--transition);
    font-family: inherit;
}
.yw-modal-close:hover { color: var(--vermillion); }

/* ---- 卡片顶条色（子系统区分） ---- */
.yw-card .stripe-gold { background: linear-gradient(90deg, var(--accent-gold), var(--accent-gold-light)); }
.yw-card .stripe-vermillion { background: linear-gradient(90deg, var(--vermillion), var(--accent-gold)); }
.yw-card .stripe-jade { background: linear-gradient(90deg, var(--jade), var(--accent-gold)); }
.yw-card .stripe-indigo { background: linear-gradient(90deg, var(--indigo), var(--accent-gold)); }
.yw-card.stripe-gold::before { background: linear-gradient(90deg, var(--accent-gold), var(--accent-gold-light)); }
.yw-card.stripe-vermillion::before { background: linear-gradient(90deg, var(--vermillion), var(--accent-gold)); }
.yw-card.stripe-jade::before { background: linear-gradient(90deg, var(--jade), var(--accent-gold)); }
.yw-card.stripe-indigo::before { background: linear-gradient(90deg, var(--indigo), var(--accent-gold)); }

/* ---- 统一输入框 ---- */
.yw-input, .yw-select, .yw-textarea {
    width: 100%;
    padding: 11px 15px;
    background: rgba(253,250,245,0.85);
    border: 1px solid rgba(139,105,20,0.22);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.yw-input:focus, .yw-select:focus, .yw-textarea:focus {
    border-color: var(--accent-gold);
    box-shadow: 0 0 0 3px rgba(139,105,20,0.08);
}
.yw-input::placeholder, .yw-textarea::placeholder { color: var(--text-muted); }

/* ---- 统一空状态 ---- */
.yw-empty {
    text-align: center;
    padding: 44px 20px;
    color: var(--text-muted);
}
.yw-empty .icon { font-size: 2.4rem; margin-bottom: 12px; opacity: 0.6; }
.yw-empty .text { font-size: 13.5px; letter-spacing: 1px; }

/* ---- 统一分隔标题 ---- */
.yw-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 26px 0 16px;
    color: var(--text-muted);
    font-size: 12px;
    letter-spacing: 3px;
}
.yw-divider::before, .yw-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(107,90,66,0.18), transparent);
}

/* Responsive */
@media (max-width: 768px) {
    .yw-header h1 { font-size: 1.5rem; }
    .yw-cards { grid-template-columns: 1fr; }
    .yw-container { padding: 24px 16px 40px; }
    .yw-main { padding: 20px 16px; }
    .yw-question-card { padding: 20px; }
    .yw-stats { grid-template-columns: repeat(2, 1fr); }
    .yw-login-box { padding: 32px 24px 28px !important; }
    .yw-modal-box { padding: 24px 18px 20px; }
    .yw-btn { padding: 12px 22px; }
}

/* ============================================
   统一页面横幅（大标题区域）v1.3
   仿 main 首页布局：上方大标题区 + 下方卡片化内容
   返回首页按钮固定在横幅右下角
   ============================================ */
.yw-page-banner {
    background: linear-gradient(135deg, #f5efe0, #ede5d3, #f5efe0);
    padding: 44px 32px 40px;
    text-align: center;
    position: relative;
    border-bottom: 1px solid rgba(139,105,20,0.1);
}
@property --yw-banner-ang {
    syntax: '<angle>';
    initial-value: 0deg;
    inherits: false;
}
.yw-page-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: conic-gradient(from var(--yw-banner-ang), transparent, rgba(139,105,20,0.04), transparent, rgba(184,58,43,0.02), transparent);
    animation: ywBannerSpin 30s linear infinite;
    pointer-events: none;
    z-index: 0;
    /* 旋转的是渐变角度而非元素本身：元素 inset:0 完全不出界，
       既不再撑长页面（旧方案 200% 元素旋转会把滚动区撑到 283%），也不会裁掉下拉菜单 */
}
@keyframes ywBannerSpin { to { --yw-banner-ang: 360deg; } }
.yw-page-banner .banner-title {
    position: relative; z-index: 1;
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--text-primary);
    font-family: 'Ma Shan Zheng', 'STXingkai', 'KaiTi', 'STKaiti', serif;
}
.yw-page-banner .banner-subtitle {
    position: relative; z-index: 1;
    color: var(--text-muted);
    margin-top: 8px;
    font-size: 0.9rem;
    letter-spacing: 4px;
}
.yw-page-banner .banner-extra {
    position: relative; z-index: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 16px;
    flex-wrap: wrap;
}
/* 横幅下方独立选项卡条（文体切换） */
.yw-level-switch-bar {
    display: flex;
    justify-content: center;
    padding: 18px 24px 16px;
    margin: 0;
    background: linear-gradient(180deg, rgba(255,253,248,0.92), rgba(250,244,230,0.72));
    border-bottom: 1px solid rgba(139,105,20,0.12);
}
.yw-level-switch-bar .essay-level-switch {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
    max-width: 880px;
}
.yw-level-switch-bar .essay-level-btn {
    flex: 1;
    min-width: 300px;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    border-radius: 14px;
    padding: 14px 20px 12px;
    background: rgba(255,253,248,0.85);
    border: 1px solid rgba(139,105,20,0.25);
    box-shadow: 0 2px 10px rgba(60,50,35,0.04);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}
.yw-level-switch-bar .essay-level-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(60,50,35,0.08);
}
.yw-level-switch-bar .essay-level-btn.active {
    background: linear-gradient(135deg, var(--theme-primary), var(--theme-secondary));
    border-color: var(--theme-primary);
    box-shadow: 0 6px 18px rgba(60,50,35,0.18);
}
.yw-level-switch-bar .essay-level-btn.active .level-kicker,
.yw-level-switch-bar .essay-level-btn.active strong,
.yw-level-switch-bar .essay-level-btn.active small {
    color: #fff;
}
.yw-level-switch-bar .essay-level-btn strong {
    font-family: 'Ma Shan Zheng', 'STXingkai', 'KaiTi', serif !important;
    font-size: 1.2rem;
    letter-spacing: 0.12em;
}
.yw-level-switch-bar .essay-level-btn small {
    font-size: 0.72rem;
    color: var(--text-tertiary);
    opacity: 0.85;
    letter-spacing: 0.06em;
}
.yw-level-switch-bar .level-kicker {
    font-size: 0.62rem;
    letter-spacing: 0.18em;
    font-weight: 600;
    padding: 2px 10px;
    border-radius: 10px;
    background: rgba(139,105,20,0.1);
    border: 1px solid rgba(139,105,20,0.3);
    color: #8b6914;
}
.yw-page-banner .banner-back {
    position: absolute;
    right: 24px; bottom: 16px;
    z-index: 2;
    background: rgba(139,105,20,0.08);
    border: 1px solid rgba(139,105,20,0.2);
    color: var(--text-secondary);
    padding: 7px 18px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    transition: background var(--transition), border-color var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.yw-page-banner .banner-back:hover {
    background: rgba(139,105,20,0.15);
    border-color: rgba(139,105,20,0.35);
}
/* 横幅右上角用户信息 */
.yw-page-banner .banner-user {
    position: absolute;
    right: 24px; top: 16px;
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--text-secondary);
}
.yw-page-banner .banner-user .banner-logout {
    background: rgba(184,58,43,0.06);
    border: 1px solid rgba(184,58,43,0.15);
    color: var(--vermillion);
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 12px;
    font-family: inherit;
    transition: background var(--transition);
}
.yw-page-banner .banner-user .banner-logout:hover {
    background: rgba(184,58,43,0.12);
}

/* 页面内容容器 */
.yw-page-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 32px 24px 60px;
    position: relative;
    z-index: 1;
}

@media (max-width: 768px) {
    .yw-page-banner { padding: 32px 16px 28px; }
    .yw-page-banner .banner-title { font-size: 1.5rem; }
    .yw-page-banner .banner-subtitle { font-size: 0.82rem; letter-spacing: 2px; }
    .yw-page-banner .banner-back { right: 12px; bottom: 10px; padding: 5px 12px; font-size: 12px; }
    .yw-page-banner .banner-user { right: 12px; top: 10px; font-size: 12px; }
    .yw-page-content { padding: 20px 16px 40px; }
}

/* ============================================================
   v2 设计系统 · 书斋读本（统一所有子系统，元宇宙除外）
   概念：语文读本编辑部风格——刊头/正文严格分区，
   朱砂印章作静态徽标，粗细双线定界，克制的入场与悬停动效
   ============================================================ */

/* ---------- 印章（静态徽标核心） ---------- */
.yw-seal {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 9px;
    background: linear-gradient(150deg, #c24b30 0%, #a63a26 100%);
    color: #fdf6ec;
    font-family: 'Ma Shan Zheng', 'KaiTi', 'STKaiti', serif;
    font-size: 25px;
    line-height: 1;
    text-shadow: 0 1px 1px rgba(90, 20, 10, 0.35);
    box-shadow:
        inset 0 0 0 2px rgba(253, 246, 236, 0.4),
        inset 0 0 0 4px rgba(150, 44, 26, 0.5),
        0 4px 14px rgba(184, 58, 43, 0.28);
    transform: rotate(-4deg);
    transition: transform 0.38s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.3s ease;
    user-select: none;
}
.yw-seal.small { width: 36px; height: 36px; font-size: 19px; border-radius: 7px; }
.yw-seal.big { width: 58px; height: 58px; font-size: 31px; border-radius: 11px; }

/* ---------- 统一页头（标题区，子系统通用） ---------- */
.yw-head {
    position: sticky;
    top: 0;
    z-index: 90;
    background: rgba(253, 250, 245, 0.93);
    -webkit-backdrop-filter: blur(14px) saturate(1.3);
    backdrop-filter: blur(14px) saturate(1.3);
    border-bottom: 3px solid var(--vermillion);
}
.yw-head::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -7px;
    height: 1px;
    background: var(--vermillion);
    opacity: 0.5;
}
.yw-head-inner {
    max-width: 1080px;
    margin: 0 auto;
    padding: 13px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.yw-head-back {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface);
    color: var(--text-secondary);
    font-size: 13px;
    font-family: inherit;
    cursor: pointer;
    transition: var(--transition);
}
.yw-head-back:hover {
    border-color: rgba(184, 58, 43, 0.4);
    color: var(--vermillion);
    background: #fdf1ec;
    transform: translateX(-2px);
}
.yw-head-center {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 14px;
}
.yw-head-titles { min-width: 0; }
.yw-head-titles h1 {
    font-family: 'Ma Shan Zheng', 'KaiTi', serif;
    font-size: 24px;
    font-weight: 400;
    letter-spacing: 3px;
    color: var(--text-primary);
    line-height: 1.15;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.yw-head-titles p {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 2.5px;
    margin-top: 3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.yw-head-right { flex-shrink: 0; display: flex; align-items: center; gap: 10px; }

/* ---------- 主页面刊头（标题区，严格独立） ---------- */
.yw-masthead {
    position: relative;
    max-width: 1080px;
    margin: 0 auto;
    padding: 46px 24px 30px;
}
.yw-masthead-top {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}
.yw-masthead-name {
    display: flex;
    align-items: baseline;
    gap: 16px;
    flex-wrap: wrap;
}
.yw-masthead-name h1 {
    font-family: 'Ma Shan Zheng', 'KaiTi', serif;
    font-weight: 400;
    font-size: clamp(34px, 5vw, 46px);
    letter-spacing: 9px;
    color: var(--text-primary);
    line-height: 1.1;
    opacity: 0;
    animation: mastIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.15s forwards;
}
.yw-masthead-name .mast-alias {
    font-size: 13px;
    color: var(--vermillion);
    letter-spacing: 5px;
    padding: 5px 12px;
    border: 1px solid rgba(184, 58, 43, 0.35);
    border-radius: 4px;
    background: rgba(184, 58, 43, 0.05);
    opacity: 0;
    animation: mastIn 0.7s ease 0.5s forwards;
}
.yw-masthead-sub {
    margin-top: 10px;
    font-size: 14px;
    color: var(--text-secondary);
    letter-spacing: 3px;
    opacity: 0;
    animation: mastIn 0.7s ease 0.65s forwards;
}
.yw-masthead-rule {
    margin-top: 24px;
    border-bottom: 3px solid var(--vermillion);
    transform-origin: left;
    transform: scaleX(0);
    animation: ruleGrow 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.35s forwards;
    position: relative;
}
.yw-masthead-rule::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -7px;
    height: 1px;
    background: var(--vermillion);
    opacity: 0.5;
}
@keyframes mastIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes ruleGrow { to { transform: scaleX(1); } }

/* ---------- 功能区（入口卡片） ---------- */
.yw-entries {
    max-width: 1080px;
    margin: 0 auto;
    padding: 34px 24px 60px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}
.yw-entry {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 18px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 24px 22px 20px;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition:
        transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
        box-shadow 0.35s ease,
        border-color 0.35s ease;
    opacity: 0;
    animation: entryIn 0.7s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}
.yw-entry::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--vermillion) 0%, rgba(184, 58, 43, 0.15) 80%, transparent 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}
.yw-entry:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: rgba(184, 58, 43, 0.32);
}
.yw-entry:hover::before { transform: scaleX(1); }
.yw-entry:hover .yw-seal { transform: rotate(0deg) scale(1.06); }
.yw-entry-body { flex: 1; min-width: 0; }
.yw-entry-title {
    font-size: 19px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.yw-entry-badge {
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 1px;
    color: var(--accent-green-dark);
    background: rgba(90, 138, 110, 0.1);
    border: 1px solid rgba(90, 138, 110, 0.25);
    padding: 2px 10px;
    border-radius: 999px;
    white-space: nowrap;
}
.yw-entry-desc {
    margin-top: 8px;
    font-size: 13.5px;
    line-height: 1.75;
    color: var(--text-secondary);
}
.yw-entry-arrow {
    margin-top: 14px;
    font-size: 13px;
    color: var(--vermillion);
    letter-spacing: 2px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.yw-entry-arrow .arr {
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
.yw-entry:hover .yw-entry-arrow .arr { transform: translateX(5px); }

/* 主打卡（第一张，横贯两列） */
.yw-entry.feature {
    grid-column: 1 / -1;
    align-items: center;
    padding: 30px 30px 26px;
    background:
        linear-gradient(135deg, rgba(184, 58, 43, 0.045) 0%, transparent 46%),
        var(--surface);
}
.yw-entry.feature .yw-entry-title { font-size: 23px; }
.yw-entry.feature .yw-entry-desc { font-size: 14px; max-width: 620px; }
.yw-entry-feature-side {
    flex-shrink: 0;
    writing-mode: vertical-rl;
    font-family: 'Ma Shan Zheng', 'KaiTi', serif;
    font-size: 15px;
    letter-spacing: 7px;
    line-height: 2.1;
    color: rgba(184, 58, 43, 0.55);
    border-left: 1px solid rgba(184, 58, 43, 0.22);
    padding-left: 14px;
    height: 100px;
    align-self: center;
    user-select: none;
}

/* 入场错峰 */
.yw-entry:nth-child(1) { animation-delay: 0.45s; }
.yw-entry:nth-child(2) { animation-delay: 0.58s; }
.yw-entry:nth-child(3) { animation-delay: 0.71s; }
.yw-entry:nth-child(4) { animation-delay: 0.84s; }
.yw-entry:nth-child(5) { animation-delay: 0.97s; }
@keyframes entryIn {
    from { opacity: 0; transform: translateY(26px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- 页脚 ---------- */
.yw-foot {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px 34px;
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 2px;
}

/* ---------- 动效可关闭 ---------- */
@media (prefers-reduced-motion: reduce) {
    .yw-masthead-name h1,
    .yw-masthead-name .mast-alias,
    .yw-masthead-sub { animation: none; opacity: 1; }
    .yw-masthead-rule { animation: none; transform: scaleX(1); }
    .yw-entry { animation: none; opacity: 1; }
    .yw-seal, .yw-entry, .yw-entry::before, .yw-entry-arrow .arr { transition: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
    .yw-head-inner { padding: 10px 14px; gap: 10px; }
    .yw-head-titles h1 { font-size: 19px; letter-spacing: 2px; }
    .yw-head-titles p { font-size: 11px; letter-spacing: 1.5px; }
    .yw-head-back { padding: 6px 10px; font-size: 12px; }
    .yw-head-right .btn-secondary, .yw-head-right .yw-btn-ghost { padding: 6px 10px; font-size: 12px; }
    .yw-masthead { padding: 30px 16px 22px; }
    .yw-masthead-name h1 { letter-spacing: 5px; }
    .yw-masthead-name .mast-alias { font-size: 11px; letter-spacing: 3px; }
    .yw-entries { grid-template-columns: 1fr; padding: 24px 16px 46px; gap: 14px; }
    .yw-entry { padding: 19px 16px 16px; gap: 14px; }
    .yw-entry.feature { padding: 22px 18px 20px; }
    .yw-entry-feature-side { display: none; }
    .yw-entry-title { font-size: 17px; }
    .yw-entry.feature .yw-entry-title { font-size: 19px; }
    .yw-entry-desc { font-size: 12.5px; }
}