/* ============================================================
 *  P7 Sponsors — Frontend Styles (v4 · 年轻公益教育风)
 *  设计语言：清爽冷调底色 · 活力紫青渐变 · 现代无衬线标题
 *  毛玻璃质感 · 轻快动效 · 高可读性
 * ============================================================ */

.p7-sponsors-page {
    /* 品牌色（由后台设置注入，作为点缀使用，不作为主色泛滥） */
    --p7s-primary: #e0729a;
    --p7s-secondary: #c9a3f0;
    --p7s-accent: #ffb87a;

    /* 中性基础色 —— 清爽冷调 */
    --p7s-ink: #1c1c2e;
    --p7s-text: #39394f;
    --p7s-text-light: #8c8ca6;
    --p7s-bg: #f5f6fb;
    --p7s-bg-soft: #eceefb;
    --p7s-surface: #ffffff;
    --p7s-border: rgba(28, 28, 46, 0.08);
    --p7s-border-strong: rgba(28, 28, 46, 0.13);

    --p7s-radius: 18px;
    --p7s-radius-sm: 12px;
    --p7s-shadow: 0 8px 30px rgba(35, 32, 29, 0.06);
    --p7s-shadow-hover: 0 16px 44px rgba(35, 32, 29, 0.12);

    --p7s-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    --p7s-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong",
        "SimSun", Georgia, serif;

    position: relative;
    background: var(--p7s-bg);
    color: var(--p7s-text);
    font-family: var(--p7s-font);
    line-height: 1.7;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

/* 全局盒模型与溢出防护 —— 杜绝移动端横向滚动 / 布局错位 */
.p7s-sponsors-page *,
.p7s-sponsors-page *::before,
.p7s-sponsors-page *::after {
    box-sizing: border-box;
}
.p7s-sponsors-page {
    max-width: 100%;
    overflow-x: hidden;
}
.p7s-sponsors-page img {
    max-width: 100%;
    height: auto;
}

/* 内容容器 —— 统一窄栏阅读宽度 */
.p7-sponsors-page section {
    position: relative;
    padding: 56px 24px;
}

.p7s-inner {
    max-width: 820px;
    margin: 0 auto;
}

/* ============================================================
 *  HERO —— 克制的公益教育头部
 * ============================================================ */
.p7s-hero {
    padding: 64px 24px 44px;
    text-align: center;
    background:
        radial-gradient(120% 80% at 50% -10%, rgba(224, 114, 154, 0.12) 0%, transparent 60%),
        linear-gradient(180deg, var(--p7s-bg-soft) 0%, var(--p7s-bg) 100%);
    border-bottom: 1px solid var(--p7s-border);
}

.p7s-hero-content {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
    /* flex 居中：彻底摆脱对 text-align 继承的依赖，移动端标题必居中 */
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* 萌芽徽标 —— 成长 / 教育 / 希望 */
.p7s-emblem {
    width: 64px;
    height: 64px;
    margin: 0 auto 22px;
    display: block;
    filter: drop-shadow(0 6px 14px rgba(224, 114, 154, 0.25));
}

.p7s-hero-kicker {
    display: inline-block;
    font-size: 12px;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--p7s-primary);
    font-weight: 600;
    margin-bottom: 14px;
}

.p7s-sponsors-page .p7s-hero-title {
    display: block;
    width: 100%;
    font-family: var(--p7s-font);
    /* 流式字号：22~30px 间随视口平滑缩放，断点不再跳变 */
    font-size: clamp(22px, 6vw, 30px);
    font-weight: 700;
    line-height: 1.3;
    margin: 0 0 14px;
    color: var(--p7s-ink);
    letter-spacing: 0.5px;
    text-align: center;
    overflow-wrap: break-word;
}

.p7s-hero-tagline {
    font-size: 15px;
    color: var(--p7s-text-light);
    margin: 0 0 22px;
    letter-spacing: 0.5px;
    overflow-wrap: break-word;
}

.p7s-hero-rule {
    width: 56px;
    height: 3px;
    border-radius: 2px;
    margin: 0 auto;
    background: linear-gradient(90deg, var(--p7s-primary), var(--p7s-accent));
}

/* ============================================================
 *  站长寄语 —— 编辑式信件卡片
 * ============================================================ */
.p7s-letter-section {
    padding-top: 48px;
}

.p7s-letter {
    background: var(--p7s-surface);
    border: 1px solid var(--p7s-border);
    border-radius: var(--p7s-radius);
    padding: 44px 48px;
    box-shadow: var(--p7s-shadow);
    position: relative;
}

.p7s-letter::before {
    /* 顶部细线点缀 */
    content: '';
    position: absolute;
    top: 0;
    left: 48px;
    right: 48px;
    height: 3px;
    border-radius: 0 0 3px 3px;
    background: linear-gradient(90deg, var(--p7s-primary), var(--p7s-secondary), var(--p7s-accent));
    opacity: 0.85;
}

/* 巨型装饰引号 —— 营造"寄语/信件"气质 */
.p7s-letter::after {
    content: '\201C';
    position: absolute;
    top: 6px;
    right: 30px;
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 130px;
    line-height: 1;
    color: var(--p7s-primary);
    opacity: 0.09;
    pointer-events: none;
    user-select: none;
}

.p7s-letter-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12.5px;
    font-weight: 700;
    color: var(--p7s-primary);
    letter-spacing: 1px;
    margin-bottom: 22px;
    padding: 6px 15px 6px 12px;
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(224, 114, 154, 0.13), rgba(201, 163, 240, 0.16));
    border: 1px solid rgba(224, 114, 154, 0.28);
}

.p7s-letter-kicker::before {
    content: '';
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--p7s-primary), var(--p7s-accent));
    display: inline-block;
    flex: none;
}

.p7s-letter-body {
    font-size: 15px;
    color: var(--p7s-text);
    overflow-wrap: break-word;
}

.p7s-letter-body p {
    margin: 0 0 16px;
    line-height: 1.95;
    text-align: justify;
}

.p7s-letter-body p:last-child {
    margin-bottom: 0;
}

/* 首字下沉 —— 让开篇有书卷气 */
.p7s-letter-body > p:first-of-type::first-letter {
    font-family: var(--p7s-font);
    font-size: 2.8em;
    font-weight: 700;
    line-height: 0.82;
    float: left;
    margin: 6px 12px 0 0;
    color: var(--p7s-primary);
}

/* 序号清单（用途说明） */
.p7s-letter-list {
    list-style: none;
    counter-reset: p7s-li;
    margin: 20px 0 22px;
    padding: 0;
    display: grid;
    gap: 12px;
}

.p7s-letter-list .p7s-letter-item {
    position: relative;
    padding: 2px 0 2px 42px;
    line-height: 1.75;
    color: var(--p7s-text);
}

.p7s-letter-list .p7s-letter-item::before {
    counter-increment: p7s-li;
    content: counter(p7s-li);
    position: absolute;
    left: 0;
    top: 1px;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--p7s-primary), var(--p7s-accent));
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 3px 8px rgba(224, 114, 154, 0.28);
}

/* 签名落款 */
.p7s-letter-sign {
    margin-top: 26px;
    padding-top: 18px;
    border-top: 1px dashed var(--p7s-border-strong);
    font-family: Georgia, var(--p7s-font);
    font-size: 14px;
    font-style: italic;
    letter-spacing: 0.5px;
    color: var(--p7s-ink);
    text-align: right;
}

/* ============================================================
 *  通用区块标题
 * ============================================================ */
.p7s-section-heading {
    text-align: center;
    font-family: var(--p7s-font);
    font-size: clamp(18px, 4.5vw, 23px);
    font-weight: 700;
    margin: 0 0 8px;
    color: var(--p7s-ink);
    letter-spacing: 0.5px;
}

.p7s-section-sub {
    text-align: center;
    font-size: 14px;
    color: var(--p7s-text-light);
    margin: 0 0 32px;
}

/* ============================================================
 *  统计区
 * ============================================================ */
.p7s-stats-grid {
    display: flex;
    justify-content: center;
    gap: 18px;
    flex-wrap: wrap;
}

.p7s-stat-block {
    flex: 1;
    min-width: 150px;
    text-align: center;
    padding: 28px 18px;
    background: var(--p7s-surface);
    border: 1px solid var(--p7s-border);
    border-radius: var(--p7s-radius);
    box-shadow: var(--p7s-shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
    overflow: hidden;
}

.p7s-stat-block::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--p7s-primary), var(--p7s-accent));
    opacity: 0.8;
}

.p7s-stat-block:hover {
    transform: translateY(-4px);
    box-shadow: var(--p7s-shadow-hover);
}

.p7s-stat-number {
    font-size: clamp(22px, 5vw, 30px);
    font-weight: 700;
    color: var(--p7s-primary);
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.5px;
    line-height: 1.1;
    white-space: nowrap;
}

.p7s-stat-name {
    font-size: 13px;
    color: var(--p7s-text-light);
    margin-top: 8px;
    letter-spacing: 0.5px;
}

/* ============================================================
 *  收款码区
 * ============================================================ */
.p7s-qr-cards {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.p7s-qr-card {
    width: 188px;
    padding: 22px 20px 18px;
    background: var(--p7s-surface);
    border: 1px solid var(--p7s-border);
    border-radius: var(--p7s-radius);
    box-shadow: var(--p7s-shadow);
    text-align: center;
    transition: transform 0.3s cubic-bezier(0.34, 1.4, 0.64, 1), box-shadow 0.3s ease;
    cursor: pointer;
}

.p7s-qr-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--p7s-shadow-hover);
}

.p7s-qr-wechat { border-top: 3px solid #07c160; }
.p7s-qr-alipay { border-top: 3px solid #1677ff; }

.p7s-qr-img-wrap {
    width: 148px;
    height: 148px;
    margin: 0 auto 14px;
    border-radius: var(--p7s-radius-sm);
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--p7s-border);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
}

.p7s-qr-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 6px;
}

.p7s-qr-label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--p7s-ink);
}

.p7s-qr-empty {
    padding: 40px 28px;
    color: var(--p7s-text-light);
    font-size: 14px;
    background: var(--p7s-surface);
    border-radius: var(--p7s-radius);
    border: 2px dashed var(--p7s-border-strong);
}

/* ============================================================
 *  时间轴 / 赞助墙
 * ============================================================ */
.p7s-timeline {
    max-width: 820px;
    margin: 0 auto;
    position: relative;
}

/* 时间轴主线 */
.p7s-timeline::before {
    content: '';
    position: absolute;
    left: 19px;
    top: 6px;
    bottom: 6px;
    width: 2px;
    background: linear-gradient(to bottom, var(--p7s-primary), var(--p7s-secondary), var(--p7s-accent));
    border-radius: 1px;
    opacity: 0.22;
}

.p7s-timeline-year {
    position: relative;
    margin-bottom: 40px;
}

.p7s-year-marker {
    position: relative;
    padding-left: 52px;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 14px;
    flex-wrap: wrap;
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
}

.p7s-year-toggle {
    position: absolute;
    left: -1px;
    top: 50%;
    transform: translateY(-50%);
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--p7s-surface);
    border: 1px solid var(--p7s-border-strong);
    color: var(--p7s-primary);
    font-size: 12px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease, background 0.2s ease;
    box-shadow: var(--p7s-shadow);
}

.p7s-year-collapsed .p7s-year-toggle {
    transform: translateY(-50%) rotate(-90deg);
}

.p7s-year-dot {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--p7s-primary), var(--p7s-accent));
    box-shadow: 0 0 0 4px var(--p7s-bg), 0 0 0 5px var(--p7s-border-strong);
    z-index: 2;
}

.p7s-year-text {
    font-family: var(--p7s-font);
    font-size: clamp(17px, 4vw, 22px);
    font-weight: 700;
    color: var(--p7s-ink);
    letter-spacing: 0.5px;
}

.p7s-year-stat {
    font-size: 12.5px;
    color: var(--p7s-text-light);
    background: var(--p7s-surface);
    padding: 4px 14px;
    border-radius: 20px;
    border: 1px solid var(--p7s-border);
    box-shadow: var(--p7s-shadow);
}

/* 年份下的卡片网格（折叠用 max-height 过渡） */
.p7s-year-cards {
    padding-left: 52px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 14px;
    overflow: hidden;
    transition: max-height 0.45s ease, opacity 0.35s ease, margin 0.35s ease;
    max-height: 8000px;
    opacity: 1;
}

.p7s-year-collapsed .p7s-year-cards {
    max-height: 0 !important;
    opacity: 0;
    margin: 0 !important;
    pointer-events: none;
    padding-top: 0;
    padding-bottom: 0;
}

/* 赞助者卡片 */
.p7s-sponsor-card {
    position: relative;
    border-radius: var(--p7s-radius);
    transition: transform 0.25s ease;
}

.p7s-card-inner {
    position: relative;
    z-index: 1;
    padding: 18px 18px 16px;
    background: var(--p7s-surface);
    border: 1px solid var(--p7s-border);
    border-radius: var(--p7s-radius);
    box-shadow: var(--p7s-shadow);
    transition: box-shadow 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
    height: 100%;
}

.p7s-sponsor-card:hover .p7s-card-inner {
    box-shadow: var(--p7s-shadow-hover);
    border-color: var(--p7s-primary);
    transform: translateY(-3px);
}

.p7s-card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.p7s-card-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--p7s-ink);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.p7s-card-channel {
    flex-shrink: 0;
    font-size: 11px;
    padding: 3px 9px;
    border-radius: 12px;
    background: var(--p7s-bg-soft);
    color: var(--p7s-text-light);
    white-space: nowrap;
}

.p7s-ch-wechat { background: rgba(7, 193, 96, 0.12); color: #07a050; }
.p7s-ch-alipay { background: rgba(22, 119, 255, 0.12); color: #1677ff; }
.p7s-ch-other  { background: rgba(230, 146, 46, 0.14); color: #c97a18; }

.p7s-card-body {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 8px;
}

.p7s-card-amount {
    font-size: 19px;
    font-weight: 700;
    color: var(--p7s-primary);
    font-variant-numeric: tabular-nums;
}

.p7s-card-date {
    font-size: 12.5px;
    color: var(--p7s-text-light);
    font-variant-numeric: tabular-nums;
}

.p7s-card-message {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--p7s-border-strong);
    font-size: 13px;
    color: var(--p7s-text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================================
 *  感谢区
 * ============================================================ */
.p7s-thank {
    position: relative;
    text-align: center;
    padding: 66px 24px 58px;
    overflow: hidden;
    color: #fff;
    background: linear-gradient(125deg, var(--p7s-primary) 0%, var(--p7s-secondary) 35%, #b06fd6 65%, var(--p7s-primary) 100%);
    background-size: 300% 300%;
    animation: p7s-footer-flow 15s ease infinite;
}

/* 动态漂浮光点 */
.p7s-thank-glow {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}
.p7s-glow {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    filter: blur(16px);
    opacity: 0.32;
    animation: p7s-glow-float 9s ease-in-out infinite;
}
.p7s-glow-1 { width: 130px; height: 130px; left: 9%;  top: 26%; animation-delay: 0s; }
.p7s-glow-2 { width: 96px;  height: 96px;  right: 13%; top: 16%; animation-delay: -3s; }
.p7s-glow-3 { width: 72px;  height: 72px;  left: 52%; bottom: 5%; animation-delay: -6s; }

.p7s-thank-inner {
    position: relative;
    z-index: 1;
}

.p7s-thank-icon {
    font-size: 26px;
    margin-bottom: 12px;
    opacity: 0.95;
}

.p7s-thank-text {
    font-family: var(--p7s-font);
    font-size: clamp(16px, 4vw, 19px);
    font-weight: 600;
    margin: 0 0 8px;
    letter-spacing: 0.5px;
}

.p7s-thank-sub {
    font-size: 13px;
    opacity: 0.82;
    letter-spacing: 0.5px;
}

/* 页脚动态渐变流动 */
@keyframes p7s-footer-flow {
    0%   { background-position: 0% 50%; }
    50%  { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}
@keyframes p7s-glow-float {
    0%, 100% { transform: translate(0, 0); opacity: 0.28; }
    50%      { transform: translate(12px, -20px); opacity: 0.6; }
}

/* ============================================================
 *  滚动揭示动画
 * ============================================================ */
.p7s-sponsors-page [data-reveal] {
    opacity: 0;
    transform: translateY(22px);
    will-change: opacity, transform;
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.p7s-sponsors-page [data-reveal].p7s-revealed {
    opacity: 1;
    transform: translateY(0);
}

.p7s-sponsor-card[data-reveal] {
    transition-delay: calc(var(--p7s-delay, 0) * 0.04s);
}

/* ============================================================
 *  响应式（字号已由 clamp() 流式接管，此处只调间距与布局）
 * ============================================================ */
@media (max-width: 768px) {
    .p7s-hero { padding: 48px 18px 36px; }
    .p7s-emblem { width: 54px; height: 54px; }

    .p7s-letter { padding: 32px 22px; }
    .p7s-letter::before { left: 22px; right: 22px; }
    .p7s-letter::after { font-size: 86px; right: 14px; top: 2px; }
    .p7s-letter-body { font-size: 14.5px; }

    .p7-sponsors-page section { padding: 40px 18px; }

    .p7s-stats-grid { gap: 10px; }
    .p7s-stat-block { min-width: 0; flex: 1 1 0; padding: 20px 10px; }

    .p7s-qr-card { width: 156px; padding: 18px 14px; }
    .p7s-qr-img-wrap { width: 124px; height: 124px; }

    .p7s-timeline::before { left: 10px; }
    .p7s-year-marker { padding-left: 36px; gap: 10px; }
    .p7s-year-dot { left: 3px; }
    .p7s-year-cards { padding-left: 36px; grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .p7s-year-cards { gap: 14px; }
    .p7s-stat-block { flex: 1 1 100%; padding: 18px 12px; }
}

/* 极窄屏（小手机）微调节 */
@media (max-width: 360px) {
    .p7s-hero { padding: 40px 14px 30px; }
    .p7s-stats-grid { gap: 8px; }
    .p7s-stat-block { padding: 16px 8px; }
    .p7s-qr-card { width: 140px; }
    .p7s-qr-img-wrap { width: 112px; height: 112px; }
    .p7s-timeline::before { left: 8px; }
    .p7s-year-marker { padding-left: 30px; }
    .p7s-year-cards { padding-left: 30px; }
    .p7s-letter { padding: 28px 16px; }
}

/* ============================================================
 *  深色模式（保持温暖克制）
 * ============================================================ */
@media (prefers-color-scheme: dark) {
    .p7-sponsors-page {
        --p7s-bg: #14142a;
        --p7s-bg-soft: #1b1b36;
        --p7s-surface: #1e1e3a;
        --p7s-border: rgba(255, 255, 255, 0.1);
        --p7s-border-strong: rgba(255, 255, 255, 0.16);
        --p7s-ink: #f2f1fb;
        --p7s-text: #c9c7e0;
        --p7s-text-light: #8e8cb0;
        --p7s-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
        --p7s-shadow-hover: 0 16px 44px rgba(0, 0, 0, 0.5);
    }
    .p7s-thank {
        background-image: linear-gradient(125deg, #c9548a 0%, #7c5cff 40%, #b06fd6 70%, #c9548a 100%);
        background-size: 300% 300%;
    }
}