/* ============================================================
   西北政法大学 新闻传播学院 02级1班 · 毕业20周年聚会
   设计理念：温暖聚会邀请函 · 告别死板表单
   ============================================================ */

:root {
    --red: #9B1B30;
    --red-soft: #C43A4E;
    --red-dark: #6B1220;
    --red-pale: #FDF0F3;
    --gold: #C4963D;
    --gold-light: #F5E6CC;
    --cream: #FBF8F2;
    --card-bg: #FFFEFA;
    --text: #3D3226;
    --text-soft: #6B5D4F;
    --text-muted: #A09485;
    --border: #EBE3D5;
    --shadow-sm: 0 1px 3px rgba(61,50,38,0.06);
    --shadow: 0 4px 20px rgba(61,50,38,0.07);
    --shadow-lg: 0 8px 40px rgba(61,50,38,0.10);
    --radius-xl: 20px;
    --radius: 14px;
    --radius-sm: 10px;
    --font: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

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

body {
    font-family: var(--font);
    background: var(--cream);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    letter-spacing: 0.01em;
}

/* ============================================================
   HERO — 温暖渐变 + 光晕
   ============================================================ */
.hero {
    position: relative;
    background: linear-gradient(170deg, #69101E 0%, #8B1A2B 25%, #A02035 50%, #7A1524 100%);
    padding: 56px 20px 44px;
    text-align: center;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    width: 300px; height: 300px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(201,169,110,0.15) 0%, transparent 70%);
    top: -80px; left: -60px;
}
.hero::after {
    content: '';
    position: absolute;
    width: 200px; height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%);
    bottom: -40px; right: -40px;
}
.hero-content { position: relative; z-index: 1; }

.hero-badge {
    display: inline-block;
    background: rgba(201,169,110,0.12);
    backdrop-filter: blur(4px);
    color: var(--gold);
    padding: 6px 22px;
    border-radius: 24px;
    font-size: 14px;
    letter-spacing: 4px;
    border: 1px solid rgba(201,169,110,0.22);
    margin-bottom: 18px;
}
.hero-title {
    font-size: 28px;
    color: #fff;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 10px;
    text-shadow: 0 2px 8px rgba(0,0,0,0.2);
    text-wrap: balance;
}
.hero-subtitle {
    font-size: 13px;
    color: rgba(255,255,255,0.62);
    letter-spacing: 1px;
    line-height: 1.8;
}
.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 32px;
    margin-top: 28px;
}
.stat-item { text-align: center; }
.stat-num {
    display: block;
    font-size: 34px;
    font-weight: 700;
    color: var(--gold);
    font-variant-numeric: tabular-nums;
    line-height: 1;
}
.stat-label {
    display: block;
    font-size: 12px;
    color: rgba(255,255,255,0.45);
    margin-top: 4px;
    letter-spacing: 1px;
}
.stat-divider {
    width: 1px;
    height: 36px;
    background: rgba(255,255,255,0.12);
}

/* ============================================================
   底部波浪过渡
   ============================================================ */
.hero-wave {
    position: relative;
    height: 28px;
    margin-top: -1px;
    background: var(--cream);
    border-radius: 40% 60% 0 0 / 20px 20px 0 0;
}

/* ============================================================
   容器
   ============================================================ */
.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 16px;
}

/* ============================================================
   聚会信息卡 — 圆润卡片 + 左侧色条
   ============================================================ */
.info-cards {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 6px;
    margin-top: -12px;
    margin-bottom: 24px;
}
.info-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 12px 6px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}
.info-card::before {
    content: '';
    position: absolute;
    left: 0; top: 8px; bottom: 8px;
    width: 3px;
    border-radius: 0 3px 3px 0;
    background: linear-gradient(180deg, var(--red), var(--gold));
}
.info-card:active { transform: translateY(-1px); box-shadow: var(--shadow); }

.info-icon-wrap {
    width: 32px; height: 32px;
    margin: 0 auto 4px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}
.info-icon-wrap.time  { background: #FFF0E6; }
.info-icon-wrap.place { background: #E8F0FE; }
.info-icon-wrap.dead  { background: #FEE9E9; }

.info-card h3 {
    font-size: 11px;
    color: var(--text);
    margin-bottom: 1px;
    font-weight: 600;
}
.info-card .info-main {
    font-size: 13px;
    color: var(--text);
    font-weight: 600;
}
.info-sub {
    font-size: 10px !important;
    color: var(--text-muted) !important;
    font-weight: normal !important;
    margin-top: 1px;
}

/* ============================================================
   第一步：手机号输入
   ============================================================ */
.phone-step {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: 40px 20px 32px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 420px;
    margin: 12px auto 48px;
    border: 1px solid var(--border);
}
.phone-step-icon {
    font-size: 48px;
    margin-bottom: 12px;
}
.phone-step-title {
    font-size: 20px;
    color: var(--text);
    font-weight: 700;
    margin-bottom: 8px;
}
.phone-step-desc {
    font-size: 14px;
    color: var(--text-soft);
    margin-bottom: 24px;
    line-height: 1.6;
}
.phone-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.phone-input {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border);
    border-radius: 28px;
    font-size: 18px;
    font-family: var(--font);
    text-align: center;
    letter-spacing: 2px;
    color: var(--text);
    background: #FEFCF8;
    transition: border-color 0.2s, box-shadow 0.2s;
    -webkit-appearance: none;
}
.phone-input:focus {
    outline: none;
    border-color: var(--red);
    box-shadow: 0 0 0 3px rgba(155,27,48,0.08);
}
.phone-input::placeholder {
    color: #C4B8A8;
    letter-spacing: 0;
    font-size: 15px;
}
.phone-submit {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--red), var(--red-dark));
    color: #fff;
    border: none;
    border-radius: 28px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 2px;
    transition: transform 0.15s, box-shadow 0.2s;
    box-shadow: 0 4px 16px rgba(139,26,43,0.25);
}
.phone-submit:active { transform: scale(0.97); }
.phone-error {
    color: var(--red);
    font-size: 13px;
    margin: 0;
}
.phone-note {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 16px;
}

/* ============================================================
   表单区 — 邀请函风格
   ============================================================ */
.form-wrapper {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: 28px 18px 32px;
    box-shadow: var(--shadow);
    margin-bottom: 56px;
    border: 1px solid var(--border);
}
.form-header {
    text-align: center;
    margin-bottom: 24px;
    padding: 4px 0 24px 0;
    border-bottom: 1px dashed var(--border);
}
.form-header-icon {
    font-size: 32px;
    margin-bottom: 6px;
}
.form-title {
    font-size: 20px;
    color: var(--text);
    font-weight: 700;
    margin-bottom: 4px;
}
.form-desc {
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.8;
}
.required-note { 
    color: var(--red-soft); 
    font-size: 12px; 
    display: block;
    margin-top: 4px;
}

/* ============================================================
   分区标题 — 带装饰圆点
   ============================================================ */
.section-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    padding-left: 2px;
}
.section-dot {
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--red);
    flex-shrink: 0;
}
.section-label {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
}

/* ============================================================
   表单字段
   ============================================================ */
.form-row {
    display: flex;
    flex-direction: column;
    gap: 0;
}
.form-group { margin-bottom: 16px; }
.form-group:last-child { margin-bottom: 0; }
.form-group > label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-soft);
    margin-bottom: 5px;
}
.form-group.required > label::after {
    content: ' *';
    color: var(--red-soft);
}

/* 输入框 — 圆润柔和 */
.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="email"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 13px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: var(--font);
    color: var(--text);
    background: #FEFCF8;
    transition: all 0.25s;
    -webkit-appearance: none;
    appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #C4B8A8;
}
.form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath d='M5 7L1 3h8z' fill='%239B8E86'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
    cursor: pointer;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--red-soft);
    box-shadow: 0 0 0 3px rgba(196,58,78,0.08);
    background: #fff;
}
.form-group textarea {
    resize: vertical;
    min-height: 90px;
    line-height: 1.7;
}

/* ============================================================
   单选 — 柔和的胶囊按钮
   ============================================================ */
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.radio-label {
    display: flex !important;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    border: 1.5px solid var(--border);
    border-radius: 24px;
    font-weight: normal !important;
    font-size: 13px !important;
    color: var(--text-soft);
    cursor: pointer;
    transition: all 0.2s;
    background: #FEFCF8;
    user-select: none;
}
.radio-label:hover {
    border-color: var(--red-soft);
    background: #FFF5F7;
}
.radio-label:has(input:checked) {
    border-color: var(--red);
    background: var(--red-pale);
    color: var(--red);
    font-weight: 500 !important;
}
.radio-label input[type="radio"] {
    accent-color: var(--red);
    width: 15px; height: 15px;
}

/* ============================================================
   提示文字
   ============================================================ */
.field-hint {
    display: block;
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ============================================================
   T恤尺码
   ============================================================ */
.shirt-sizes {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.shirt-item {
    background: #FFFCF7;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px;
}
.shirt-hint { margin-bottom: 14px; }

/* ============================================================
   住宿日期
   ============================================================ */
.stay-dates { margin-top: 4px; }
.room-selects { display: flex; gap: 10px; }
.room-item {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 8px;
}
.room-label { font-size: 13px; color: var(--text-soft); white-space: nowrap; flex-shrink: 0; }
.room-count { flex: 1; }

/* ============================================================
   提交按钮 — 温暖渐变
   ============================================================ */
.submit-btn {
    display: block;
    width: 100%;
    padding: 16px;
    background: linear-gradient(135deg, #A02035, #8B1A2B);
    color: #fff;
    border: none;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 2px;
    margin-top: 20px;
    transition: transform 0.15s, box-shadow 0.2s;
    box-shadow: 0 4px 16px rgba(139,26,43,0.25);
}
.submit-btn:active {
    transform: scale(0.97);
    box-shadow: 0 2px 8px rgba(139,26,43,0.2);
}
.submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    box-shadow: none;
}

/* ============================================================
   已报名提示
   ============================================================ */
.already-msg {
    background: #F4F8EE;
    border: 1px solid #D8E8CC;
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-bottom: 18px;
    text-align: center;
}
.already-msg p { color: #4A7C3F; font-size: 14px; }
.already-sub { font-size: 12px !important; color: var(--text-muted) !important; margin-top: 3px; }

/* ============================================================
   已报名滚动条
   ============================================================ */
.attending-bar-wrap { margin-bottom: 16px; }
.attending-bar {
    background: var(--card-bg);
    border-radius: 28px;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}
.attending-icon { font-size: 18px; flex-shrink: 0; }
.attending-label {
    font-size: 13px;
    color: var(--red);
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
}
.attending-scroll { flex: 1; overflow: hidden; }
.attending-link {
    font-size: 12px;
    color: var(--red);
    text-decoration: none;
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
    padding: 4px 10px;
    border: 1px solid var(--red);
    border-radius: 14px;
}
.feature-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.feature-btn {
    flex: 1;
    min-width: 70px;
    text-align: center;
    padding: 10px 8px;
    background: var(--card-bg);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-soft);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s, box-shadow 0.15s;
}
.feature-btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.feature-btn:active { transform: scale(0.97); }
.attending-track {
    display: flex;
    gap: 16px;
    animation: scrollNames 30s linear infinite;
    width: max-content;
}
.attending-name {
    font-size: 13px;
    color: var(--text-soft);
    white-space: nowrap;
    padding: 2px 8px;
    background: #FDF0F3;
    border-radius: 12px;
}
@keyframes scrollNames {
    0%   { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

/* ============================================================
   寄语墙
   ============================================================ */
.message-wall {
    margin-bottom: 40px;
}
.message-wall-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    padding: 0 4px;
}
.message-wall-icon { font-size: 22px; }
.message-wall-header h2 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text);
}
.message-wall-count {
    font-size: 12px;
    color: var(--text-muted);
    margin-left: auto;
}
.message-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.message-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 14px 16px;
    box-shadow: var(--shadow-sm);
    border-left: 3px solid var(--gold);
}
.message-card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}
.message-author {
    font-size: 13px;
    font-weight: 600;
    color: var(--red);
}
.message-time {
    font-size: 11px;
    color: var(--text-muted);
}
.message-text {
    font-size: 13px;
    color: var(--text-soft);
    line-height: 1.7;
}
@media (max-width: 499px) {
    .message-cards { grid-template-columns: 1fr; }
}

/* ============================================================
   页脚
   ============================================================ */
footer {
    text-align: center;
    padding: 40px 20px 36px;
    margin-top: 24px;
    background: linear-gradient(180deg, #69101E, #4A0A14);
    color: rgba(255,255,255,0.5);
    font-size: 12px;
}
footer p {
    margin: 4px 0;
    letter-spacing: 1.5px;
    line-height: 1.8;
}
.footer-sub {
    font-size: 11px !important;
    opacity: 0.6;
    margin-top: 8px !important;
}

/* ============================================================
   结果页
   ============================================================ */
.result-box {
    max-width: 420px;
    margin: 60px auto;
    padding: 40px 24px;
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
}
.result-icon { font-size: 52px; margin-bottom: 14px; }
.result-box h2 { font-size: 20px; margin-bottom: 10px; font-weight: 700; }
.result-box p { color: var(--text-soft); }
.back-btn {
    display: inline-block;
    margin-top: 20px;
    padding: 11px 32px;
    background: var(--red);
    color: #fff;
    text-decoration: none;
    border-radius: 24px;
    font-size: 14px;
    transition: background 0.2s;
}
.back-btn:hover { background: var(--red-soft); }

/* ============================================================
   平板
   ============================================================ */
@media (min-width: 500px) {
    .form-row {
        flex-direction: row;
        gap: 14px;
    }
    .form-row .form-group { flex: 1; }
    .shirt-sizes {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 10px 12px;
    }
    .info-cards { gap: 8px; }
    .info-card { padding: 14px 8px; }
    .info-icon-wrap { width: 36px; height: 36px; font-size: 18px; }
    .info-card h3 { font-size: 12px; }
    .info-card .info-main { font-size: 14px; }
    .info-sub { font-size: 11px !important; }
    .section-head { margin-top: 4px; }
}

/* ============================================================
   桌面 768+
   ============================================================ */
@media (min-width: 768px) {
    .hero { padding: 80px 20px 56px; }
    .hero-badge { font-size: 15px; padding: 7px 28px; letter-spacing: 5px; }
    .hero-title { font-size: 40px; letter-spacing: 4px; }
    .hero-subtitle { font-size: 15px; }
    .hero-stats { gap: 48px; margin-top: 32px; }
    .stat-num { font-size: 44px; }
    .stat-label { font-size: 13px; }

    .container { max-width: 860px; padding: 0 24px; }

    .info-cards { gap: 14px; margin-top: -20px; }
    .info-card { padding: 22px 14px; border-radius: var(--radius); }
    .info-icon-wrap { width: 46px; height: 46px; font-size: 22px; margin-bottom: 8px; }
    .info-card h3 { font-size: 14px; }
    .info-card .info-main { font-size: 15px; }
    .info-sub { font-size: 12px !important; }

    .form-wrapper { padding: 40px 40px; border-radius: var(--radius-xl); }
    .form-header { padding-bottom: 24px; margin-bottom: 28px; }
    .form-header-icon { font-size: 38px; }
    .form-title { font-size: 22px; }
    .section-label { font-size: 16px; }
    .section-dot { width: 10px; height: 10px; }
    .section-head { margin-top: 12px; }

    .form-group > label { font-size: 14px; }
    .form-group input[type="text"],
    .form-group input[type="tel"],
    .form-group select,
    .form-group textarea { padding: 12px 16px; font-size: 15px; }

    .radio-label { font-size: 14px !important; padding: 11px 18px; }

    .phone-step { max-width: 100%; padding: 52px 48px 44px; }
    .phone-step-icon { font-size: 56px; }
    .phone-step-title { font-size: 22px; }
    .phone-step-desc { font-size: 15px; }
    .phone-form {
        flex-direction: row;
        gap: 12px;
        align-items: center;
    }
    .phone-input { flex: 1; }
    .phone-submit { width: auto; padding: 16px 40px; white-space: nowrap; }

    .message-cards { grid-template-columns: 1fr 1fr; gap: 14px; }
    .message-card { padding: 18px 20px; }
    .message-author { font-size: 14px; }
    .message-text { font-size: 14px; }

    .submit-btn { font-size: 17px; padding: 17px; margin-top: 24px; }

    /* 住宿行：PC端4列均匀分布 */
    .acc-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .acc-row .stay-dates { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 0; }

    footer { padding: 44px 20px 36px; font-size: 13px; }
}

/* ============================================================
   大屏 1024+
   ============================================================ */
@media (min-width: 1024px) {
    .hero { padding: 96px 20px 64px; }
    .hero-title { font-size: 46px; }
    .container { max-width: 1000px; }
    .info-cards { gap: 18px; }
    .info-card { padding: 26px 18px; }
    .form-wrapper { padding: 48px 56px; }
    .phone-step { max-width: 100%; }
    .message-cards { grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
}

/* ============================================================
   超大屏 1280+
   ============================================================ */
@media (min-width: 1280px) {
    .container { max-width: 1100px; }
    .form-wrapper { padding: 52px 64px; }
}

/* ============================================================
   PC端交互增强
   ============================================================ */
@media (hover: hover) {
    .info-card:hover {
        transform: translateY(-3px);
        box-shadow: var(--shadow-lg);
    }
    .message-card:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow);
    }
    .submit-btn:hover {
        filter: brightness(1.1);
    }
    .phone-submit:hover {
        filter: brightness(1.1);
    }
    .radio-label:hover {
        border-color: var(--red-soft);
        background: var(--red-pale);
    }
    .form-group input:hover,
    .form-group select:hover,
    .form-group textarea:hover {
        border-color: #d0c8b8;
    }
}

/* ============================================================
   微动效
   ============================================================ */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}
.info-card { animation: fadeUp 0.4s ease both; }
.info-card:nth-child(2) { animation-delay: 0.05s; }
.info-card:nth-child(3) { animation-delay: 0.1s; }

html { scroll-behavior: smooth; }