/* 学生会员宣传 — 专题页 + 首页/课程条带共用 */

/* ---------- 全局条带（首页顶栏下、课程页等） ---------- */
.mc-membership-strip {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px 20px;
    padding: 10px 20px;
    background: linear-gradient(90deg, #0a2463 0%, #1a4a8c 40%, #3e92cc 100%);
    color: rgba(255, 255, 255, 0.95);
    font-size: 14px;
    text-align: center;
}

.mc-membership-strip strong {
    color: #ffd700;
    font-weight: 700;
}

.mc-membership-strip a {
    color: #ffd700;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    padding: 4px 12px;
    border: 1px solid rgba(255, 215, 0, 0.6);
    border-radius: 999px;
    transition: background 0.2s ease, color 0.2s ease;
}

.mc-membership-strip a:hover {
    background: rgba(255, 215, 0, 0.15);
    color: #fff;
}

/* ---------- 首页大横幅（轮播下方） ---------- */
.mc-membership-home {
    padding: 48px 20px 56px;
    background: linear-gradient(160deg, #f0f6ff 0%, #e8f0fc 45%, #fff9e6 100%);
    border-top: 1px solid rgba(10, 36, 99, 0.08);
    border-bottom: 1px solid rgba(10, 36, 99, 0.06);
}

.mc-membership-home .container {
    max-width: 1100px;
    margin: 0 auto;
}

.mc-membership-home__badge {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: #0a2463;
    background: rgba(255, 215, 0, 0.35);
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 16px;
}

.mc-membership-home__title {
    font-size: clamp(22px, 4vw, 30px);
    font-weight: 800;
    color: #0a2463;
    margin: 0 0 12px;
    line-height: 1.3;
}

.mc-membership-home__lead {
    font-size: 16px;
    color: #444;
    max-width: 720px;
    margin: 0 0 28px;
    line-height: 1.6;
}

.mc-membership-home__cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

@media (max-width: 900px) {
    .mc-membership-home__cards {
        grid-template-columns: 1fr;
    }
}

.mc-membership-home__card {
    background: #fff;
    border-radius: 14px;
    padding: 20px 18px;
    box-shadow: 0 8px 28px rgba(10, 36, 99, 0.08);
    border: 1px solid rgba(10, 36, 99, 0.06);
    text-align: left;
}

.mc-membership-home__card--featured {
    border-color: rgba(255, 215, 0, 0.65);
    box-shadow: 0 12px 36px rgba(255, 193, 7, 0.18);
    position: relative;
}

.mc-membership-home__card--featured::before {
    content: "推荐";
    position: absolute;
    top: 12px;
    right: 14px;
    font-size: 11px;
    font-weight: 700;
    color: #0a2463;
    background: #ffd700;
    padding: 2px 8px;
    border-radius: 4px;
}

.mc-membership-home__tier {
    font-size: 15px;
    font-weight: 700;
    color: #0a2463;
    margin: 0 0 6px;
}

.mc-membership-home__price {
    font-size: 22px;
    font-weight: 800;
    color: #c62828;
    margin: 0 0 10px;
}

.mc-membership-home__price small {
    font-size: 13px;
    font-weight: 600;
    color: #666;
}

.mc-membership-home__card ul {
    margin: 0;
    padding-left: 18px;
    font-size: 13px;
    color: #555;
    line-height: 1.55;
}

.mc-membership-home__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

.mc-membership-home__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 700;
    border-radius: 10px;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.mc-membership-home__btn--primary {
    background: linear-gradient(135deg, #ffd700 0%, #e6b800 100%);
    color: #0a2463;
    box-shadow: 0 4px 16px rgba(255, 215, 0, 0.35);
}

.mc-membership-home__btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 215, 0, 0.45);
}

.mc-membership-home__btn--ghost {
    background: #fff;
    color: #0a2463;
    border: 2px solid #0a2463;
}

.mc-membership-home__btn--ghost:hover {
    background: rgba(10, 36, 99, 0.06);
}

.mc-membership-home__note {
    font-size: 12px;
    color: #777;
    margin: 16px 0 0;
}

/* ---------- 课程页顶条 ---------- */
.courses-membership-strip {
    margin: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

/* ---------- 专题页 ---------- */
.mc-page {
    background: #f5f7fb;
}

.mc-page-hero {
    padding: 48px 20px 40px;
    background: linear-gradient(135deg, #0a2463 0%, #1e5799 50%, #3e92cc 100%);
    color: #fff;
    text-align: center;
}

.mc-page-hero h1 {
    font-size: clamp(26px, 4.5vw, 36px);
    font-weight: 800;
    margin: 0 0 12px;
    text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.mc-page-hero p {
    font-size: 16px;
    opacity: 0.92;
    max-width: 640px;
    margin: 0 auto 24px;
    line-height: 1.6;
}

.mc-page-hero__cta {
    display: inline-flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.mc-page-hero__cta a {
    padding: 12px 22px;
    border-radius: 10px;
    font-weight: 700;
    text-decoration: none;
    font-size: 15px;
}

.mc-page-body {
    max-width: 1100px;
    margin: 0 auto;
    padding: 40px 20px 64px;
}

.mc-tier-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

@media (max-width: 900px) {
    .mc-tier-grid {
        grid-template-columns: 1fr;
    }
}

.mc-tier-card {
    background: #fff;
    border-radius: 16px;
    padding: 28px 22px 24px;
    box-shadow: 0 10px 40px rgba(10, 36, 99, 0.08);
    border: 1px solid #e8ecf2;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transform: translateY(0);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.mc-tier-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 56px rgba(10, 36, 99, 0.12);
}

/* 透明背景图案与柔光（默认） */
.mc-tier-card::before {
    content: "";
    position: absolute;
    inset: -2px;
    pointer-events: none;
    opacity: 0.55;
    background:
        radial-gradient(14px 14px at 18% 22%, rgba(62, 146, 204, 0.22), transparent 65%),
        radial-gradient(18px 18px at 78% 18%, rgba(255, 215, 0, 0.18), transparent 70%),
        radial-gradient(22px 22px at 82% 78%, rgba(156, 39, 176, 0.14), transparent 72%),
        linear-gradient(135deg, rgba(10, 36, 99, 0.04) 0%, rgba(62, 146, 204, 0.06) 55%, rgba(255, 215, 0, 0.06) 100%);
    filter: blur(0px);
}

.mc-tier-card::after {
    content: "";
    position: absolute;
    top: -120px;
    right: -140px;
    width: 280px;
    height: 280px;
    pointer-events: none;
    opacity: 0.6;
    background:
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0) 55%),
        radial-gradient(circle at 70% 60%, rgba(255, 215, 0, 0.20), rgba(255, 215, 0, 0) 62%);
    transform: rotate(18deg);
}

/* 确保内容层级在图案之上 */
.mc-tier-card > * {
    position: relative;
    z-index: 1;
}

.mc-tier-card__label {
    position: relative;
    z-index: 2;
}

.mc-tier-card__tag {
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.mc-tier-card h2 {
    letter-spacing: 0.01em;
}

.mc-tier-card ul {
    color: rgba(20, 24, 30, 0.82);
}

.mc-tier-card li strong {
    color: #0a2463;
}

.mc-tier-card__actions {
    margin-top: 12px;
    display: flex;
}

.mc-tier-card__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 12px 14px;
    border-radius: 12px;
    text-decoration: none;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.01em;
    border: 1px solid rgba(10, 36, 99, 0.10);
    box-shadow: 0 10px 26px rgba(10, 36, 99, 0.10);
    transform: translateY(0);
    transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.mc-tier-card__btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 34px rgba(10, 36, 99, 0.14);
    filter: saturate(1.05);
}

.mc-tier-card__btn--basic {
    background: linear-gradient(135deg, rgba(10, 36, 99, 0.92) 0%, rgba(62, 146, 204, 0.92) 100%);
    color: #fff;
}

.mc-tier-card__btn--elite {
    background: linear-gradient(135deg, #ffd700 0%, #e6b800 100%);
    color: #0a2463;
    border-color: rgba(255, 215, 0, 0.55);
    box-shadow: 0 14px 30px rgba(255, 193, 7, 0.26);
}

.mc-tier-card__btn--talent {
    background: linear-gradient(135deg, rgba(123, 31, 162, 0.92) 0%, rgba(10, 36, 99, 0.92) 100%);
    color: #fff;
}

.mc-tier-card--elite {
    border-color: rgba(255, 215, 0, 0.85);
    box-shadow: 0 18px 56px rgba(255, 193, 7, 0.22);
    transform: scale(1.02);
}

@media (max-width: 900px) {
    .mc-tier-card--elite {
        transform: none;
    }
}

/* 基础会员：深空蓝 + 冷灰 */
.mc-tier-card--basic {
    border-color: rgba(84, 110, 122, 0.28);
    background: linear-gradient(180deg, rgba(84, 110, 122, 0.04) 0%, rgba(255, 255, 255, 0.92) 32%, #ffffff 100%);
}

.mc-tier-card--basic::before {
    opacity: 0.6;
    background:
        radial-gradient(12px 12px at 22% 24%, rgba(84, 110, 122, 0.22), transparent 70%),
        radial-gradient(18px 18px at 78% 18%, rgba(62, 146, 204, 0.16), transparent 72%),
        linear-gradient(135deg, rgba(10, 36, 99, 0.035) 0%, rgba(84, 110, 122, 0.06) 55%, rgba(62, 146, 204, 0.05) 100%);
}

/* 精英会员：蓝金主题 + 轻微网格 */
.mc-tier-card--elite {
    background: linear-gradient(180deg, rgba(255, 215, 0, 0.10) 0%, rgba(255, 255, 255, 0.92) 34%, #ffffff 100%);
}

.mc-tier-card--elite::before {
    opacity: 0.65;
    background:
        radial-gradient(18px 18px at 20% 24%, rgba(255, 215, 0, 0.28), transparent 72%),
        radial-gradient(22px 22px at 78% 18%, rgba(62, 146, 204, 0.22), transparent 72%),
        linear-gradient(90deg, rgba(10, 36, 99, 0.045) 1px, transparent 1px),
        linear-gradient(0deg, rgba(10, 36, 99, 0.045) 1px, transparent 1px),
        linear-gradient(135deg, rgba(255, 215, 0, 0.08) 0%, rgba(62, 146, 204, 0.06) 55%, rgba(10, 36, 99, 0.04) 100%);
    background-size: auto, auto, 22px 22px, 22px 22px, auto;
}

/* 天赋会员：紫金 + “电路”线条感 */
.mc-tier-card--talent {
    border-color: rgba(123, 31, 162, 0.24);
    background: linear-gradient(180deg, rgba(123, 31, 162, 0.07) 0%, rgba(255, 255, 255, 0.92) 34%, #ffffff 100%);
}

.mc-tier-card--talent::before {
    opacity: 0.62;
    background:
        radial-gradient(18px 18px at 18% 28%, rgba(123, 31, 162, 0.22), transparent 72%),
        radial-gradient(20px 20px at 80% 20%, rgba(255, 215, 0, 0.18), transparent 72%),
        linear-gradient(135deg, rgba(123, 31, 162, 0.12) 0%, rgba(10, 36, 99, 0.04) 55%, rgba(255, 215, 0, 0.06) 100%),
        linear-gradient(90deg, transparent 0 32px, rgba(123, 31, 162, 0.09) 32px 34px, transparent 34px 100%),
        linear-gradient(0deg, transparent 0 44px, rgba(255, 215, 0, 0.10) 44px 46px, transparent 46px 100%);
}

/* 标签微调：更像“胶囊”浮层 */
.mc-tier-card__tag {
    border: 1px solid rgba(10, 36, 99, 0.08);
    background: rgba(227, 242, 253, 0.75);
}

.mc-tier-card--elite .mc-tier-card__tag {
    border-color: rgba(255, 215, 0, 0.35);
    background: rgba(255, 248, 225, 0.78);
}

.mc-tier-card--talent .mc-tier-card__tag {
    border-color: rgba(123, 31, 162, 0.22);
    background: rgba(243, 229, 245, 0.78);
}

.mc-tier-card__label {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: #3e92cc;
    margin-bottom: 8px;
}

.mc-tier-card--talent .mc-tier-card__label {
    color: #7b1fa2;
}

.mc-tier-card--basic .mc-tier-card__label {
    color: #546e7a;
}

.mc-tier-card h2 {
    font-size: 22px;
    margin: 0 0 8px;
    color: #0a2463;
}

.mc-tier-card__price {
    font-size: 28px;
    font-weight: 800;
    color: #c62828;
    margin-bottom: 4px;
}

.mc-tier-card__cycle {
    font-size: 14px;
    color: #666;
    margin-bottom: 20px;
}

.mc-tier-card ul {
    flex: 1;
    margin: 0 0 20px;
    padding-left: 20px;
    color: #444;
    line-height: 1.65;
    font-size: 14px;
}

.mc-tier-card li + li {
    margin-top: 8px;
}

.mc-tier-card__tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    background: #e3f2fd;
    color: #1565c0;
    padding: 4px 10px;
    border-radius: 6px;
    margin-bottom: 12px;
}

.mc-tier-card--elite .mc-tier-card__tag {
    background: #fff8e1;
    color: #f57f17;
}

.mc-tier-card--talent .mc-tier-card__tag {
    background: #f3e5f5;
    color: #6a1b9a;
}

.mc-compare-wrap {
    background: #fff;
    border-radius: 16px;
    padding: 28px 20px 32px;
    margin-bottom: 40px;
    box-shadow: 0 8px 32px rgba(10, 36, 99, 0.06);
    overflow-x: auto;
}

.mc-compare-wrap h2 {
    font-size: 20px;
    color: #0a2463;
    margin: 0 0 20px;
    text-align: center;
}

.mc-compare {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    min-width: 560px;
}

.mc-compare th,
.mc-compare td {
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.mc-compare th {
    background: #f5f7fb;
    color: #0a2463;
    font-weight: 700;
}

.mc-compare tr:last-child td {
    border-bottom: none;
}

.mc-compare .ok {
    color: #2e7d32;
    font-weight: 600;
}

.mc-compare .partial {
    color: #f57c00;
}

.mc-faq {
    background: #fff;
    border-radius: 16px;
    padding: 28px 24px 32px;
    box-shadow: 0 8px 32px rgba(10, 36, 99, 0.06);
}

.mc-faq h2 {
    font-size: 20px;
    color: #0a2463;
    margin: 0 0 20px;
}

.mc-faq details {
    border-bottom: 1px solid #eee;
    padding: 14px 0;
}

.mc-faq details:last-child {
    border-bottom: none;
}

.mc-faq summary {
    font-weight: 600;
    color: #333;
    cursor: pointer;
    list-style: none;
}

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

.mc-faq details[open] summary {
    color: #0a2463;
    margin-bottom: 8px;
}

.mc-faq details p {
    margin: 0;
    font-size: 14px;
    color: #555;
    line-height: 1.65;
    padding-left: 0;
}

.mc-disclaimer {
    font-size: 12px;
    color: #888;
    text-align: center;
    margin-top: 32px;
    line-height: 1.5;
}