html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

body {
 text-align:justify;
}


/* ============================================================
   AIDSE 2027 - Site Theme
   Deep ocean blue + emerald accent, compact & elegant
   ============================================================ */
:root {
    --primary: #0b3d63;
    --primary-2: #0e5a8a;
    --primary-3: #1273ad;
    --accent: #12a37c;
    --accent-2: #0d9488;
    --accent-soft: #e6f6f1;
    --gold: #e8b23a;
    --ink: #22303c;
    --muted: #61707d;
    --line: #e3e9ee;
    --bg: #f4f7f9;
    --radius: 12px;
    --shadow-sm: 0 2px 10px rgba(11, 61, 99, .07);
    --shadow-md: 0 8px 26px rgba(11, 61, 99, .12);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Segoe UI", "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    color: var(--ink);
    background: var(--bg);
    font-size: .95rem;
    line-height: 1.65;
}

a {
    color: var(--primary-2);
    text-decoration: none;
}

    a:hover {
        color: var(--accent);
    }

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -.01em;
}

img {
    max-width: 100%;
}

/* ===== Buttons ===== */
.btn-brand {
    background: linear-gradient(135deg, var(--primary), var(--primary-3));
    color: #fff;
    border: none;
    border-radius: 50px;
    padding: .55rem 1.5rem;
    font-weight: 600;
    box-shadow: 0 6px 16px rgba(14, 90, 138, .35);
    transition: all .25s;
}

    .btn-brand:hover {
        background: linear-gradient(135deg, var(--primary-2), var(--accent-2));
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 10px 22px rgba(13, 148, 136, .4);
    }

.btn-outline-brand {
    border: 2px solid var(--primary-2);
    color: var(--primary-2);
    border-radius: 50px;
    padding: .45rem 1.4rem;
    font-weight: 600;
    background: transparent;
    transition: all .25s;
}

    .btn-outline-brand:hover {
        background: var(--primary-2);
        color: #fff;
    }





/* ===== Navigation ===== */
.main-nav {
    background: var(--primary);
    box-shadow: 0 2px 12px rgba(11, 61, 99, .08);
    padding: .35rem 0;
    /* z-index: 1030;*/
}

    .main-nav.scrolled {
        box-shadow: 0 6px 20px rgba(11, 61, 99, .15);
    }

    .main-nav .nav-link {
        color: #7ce3c1;
        font-weight: 600;
        padding: .55rem .9rem;
        position: relative;
        transition: color .2s;
    }

        .main-nav .nav-link i {
            font-size: .8em;
            opacity: .55;
        }

        .main-nav .nav-link::after {
            content: "";
            position: absolute;
            left: .9rem;
            right: .9rem;
            bottom: .18rem;
            height: 2.5px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--accent), var(--primary-3));
            transform: scaleX(0);
            transition: transform .25s;
        }

        .main-nav .nav-link:hover, .main-nav .nav-link.active {
            color: #fff;
        }

            .main-nav .nav-link:hover::after, .main-nav .nav-link.active::after {
                transform: scaleX(1);
            }

    .main-nav .dropdown-menu {
        border: none;
        border-radius: 10px;
        box-shadow: var(--shadow-md);
        padding: .45rem;
        margin-top: .15rem !important;
        font-size: .9rem;
    }

    .main-nav .dropdown-item {
        border-radius: 8px;
        padding: .5rem .85rem;
        color: var(--ink);
    }

        .main-nav .dropdown-item:hover {
            background: var(--accent-soft);
            color: var(--primary);
        }

.navbar-brand.d-lg-none {
    font-weight: 800;
    color: var(--primary);
}

/* ===== Section Common ===== */
section.py-sec {
    padding: 3.2rem 0;
}

.section-tag {
    display: inline-block;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--accent-2);
    background: var(--accent-soft);
    border: 1px solid #c8ecdf;
    border-radius: 50px;
    padding: .22rem .9rem;
    margin-bottom: .5rem;
}

.section-heading {
    font-size: 1.7rem;
    margin-bottom: .4rem;
    position: relative;
}

    .section-heading::after {
        content: "";
        display: block;
        width: 54px;
        height: 3.5px;
        border-radius: 3px;
        margin-top: .5rem;
        background: linear-gradient(90deg, var(--accent), var(--primary-3));
    }

    .section-heading.text-center::after {
        margin-left: auto;
        margin-right: auto;
    }

.section-subtitle {
    color: var(--muted);
    max-width: 760px;
}

    .section-subtitle.text-center {
        margin-left: auto;
        margin-right: auto;
    }

/* ===== Hero (image only) ===== */
.hero-section {
    position: relative;
    background: url('https://opensz.oss-cn-beijing.aliyuncs.com/Web2027/EDSES2027/img/bg01.jpg') center / cover no-repeat;
    /* 高度随屏幕宽度按图片比例 (1920 x 600) 自适应 */
    aspect-ratio: 1920 / 600;
    overflow: hidden;
}

.hero-wave {
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    z-index: 3;
    line-height: 0;
}

    .hero-wave svg {
        display: block;
        width: 100%;
        height: clamp(26px, 3vw, 56px);
    }

/* 中等及以下屏幕：图片左右裁切，改用最小高度保证视觉舒适 */
@media (max-width: 1199.98px) {
    .hero-section {
        aspect-ratio: auto;
        min-height: 480px;
    }
}
/* ===== Quick Entrances (System Entrance) ===== */
.quick-section {
    margin-top: -1.6rem;
    position: relative;
    z-index: 5;
}

.quick-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 1.15rem 1.2rem;
    height: 100%;
    border-top: 3px solid var(--accent);
    transition: transform .25s, box-shadow .25s;
    position: relative;
    overflow: hidden;
}

    .quick-card::after {
        content: "";
        position: absolute;
        right: -30px;
        top: -30px;
        width: 90px;
        height: 90px;
        border-radius: 50%;
        background: var(--accent-soft);
        opacity: .7;
    }

    .quick-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 14px 34px rgba(11, 61, 99, .18);
    }

.quick-icon {
    width: 44px;
    height: 44px;
    border-radius: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: #fff;
    margin-bottom: .65rem;
    position: relative;
}

.quick-card h5 {
    font-size: 1.02rem;
    margin-bottom: .2rem;
    position: relative;
}

.quick-card p {
    font-size: .82rem;
    color: var(--muted);
    margin-bottom: .55rem;
    position: relative;
}

.quick-link {
    font-weight: 700;
    font-size: .85rem;
    position: relative;
}

    .quick-link i {
        transition: transform .2s;
    }

    .quick-link:hover i {
        transform: translateX(4px);
    }

.quick-blue .quick-icon {
    background: linear-gradient(135deg, #1273ad, #0e5a8a);
}

.quick-green .quick-icon {
    background: linear-gradient(135deg, #14b389, #0d9488);
}

.quick-purple .quick-icon {
    background: linear-gradient(135deg, #7c5cc4, #5b3fa8);
}

.quick-gold .quick-icon {
    background: linear-gradient(135deg, #eab53d, #d18f14);
}

/* ===== Welcome ===== */
.welcome-section {
    background: #fff;
}

    .welcome-section .lead-text {
        color: var(--ink);
    }

.welcome-checklist {
    list-style: none;
    padding: 0;
    margin: .8rem 0 0;
}

    .welcome-checklist li {
        padding: .28rem 0 .28rem 1.7rem;
        position: relative;
        font-size: .9rem;
    }

        .welcome-checklist li::before {
            content: "\F26E";
            font-family: "bootstrap-icons";
            position: absolute;
            left: 0;
            top: .32rem;
            color: var(--accent);
            font-size: 1rem;
        }

.welcome-visual {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    position: relative;
}

    .welcome-visual img {
        display: block;
        width: 100%;
        height: 300px;
        object-fit: cover;
    }

.welcome-visual-tag {
    position: absolute;
    left: 12px;
    bottom: 12px;
    background: rgba(8, 44, 73, .78);
    color: #fff;
    backdrop-filter: blur(4px);
    border-radius: 8px;
    font-size: .78rem;
    padding: .3rem .75rem;
}

    .welcome-visual-tag i {
        color: #7ce3c1;
    }

.welcome-stats {
    display: flex;
    gap: .6rem;
    margin-top: .9rem;
}

.stat-chip {
    flex: 1;
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: 10px;
    text-align: center;
    padding: .55rem .3rem;
}

    .stat-chip strong {
        display: block;
        font-size: 1.15rem;
        color: var(--primary);
    }

    .stat-chip small {
        color: var(--muted);
        font-size: .72rem;
    }

/* ===== Important Dates ===== */
.dates-section {
    background: linear-gradient(180deg, #eef4f8, #f4f7f9);
}

.dates-countdown-bar {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 50px;
    box-shadow: var(--shadow-sm);
    padding: .5rem 1.4rem;
    font-size: .92rem;
    margin: .6rem 0 1.2rem;
}

    .dates-countdown-bar i {
        color: var(--gold);
        font-size: 1.05rem;
    }

    .dates-countdown-bar strong {
        color: var(--primary);
        font-size: 1.05rem;
    }

.date-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1rem 1.1rem;
    height: 100%;
    display: flex;
    align-items: center;
    gap: .9rem;
    transition: transform .25s, box-shadow .25s;
}

    .date-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }

.date-icon {
    width: 46px;
    height: 46px;
    flex: none;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--primary-3);
    background: #e8f2fa;
}

.date-num {
    font-size: 1.12rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.15;
}

.date-year {
    font-size: .74rem;
    color: var(--muted);
    letter-spacing: .08em;
}

.date-card p {
    margin: 0;
    font-size: .84rem;
    color: var(--muted);
    font-weight: 600;
}

.date-card-highlight {
    border: 1.5px solid var(--accent);
    background: linear-gradient(135deg, #fff, var(--accent-soft));
}

    .date-card-highlight .date-icon {
        background: var(--accent);
        color: #fff;
    }

    .date-card-highlight p {
        color: var(--accent-2);
    }

/* ===== Files Download ===== */
.downloads-section {
    background: #fff;
}

.download-card {
    display: flex;
    align-items: center;
    gap: .85rem;
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: .85rem 1rem;
    color: var(--ink);
    height: 100%;
    transition: all .22s;
}

    .download-card:hover {
        background: #fff;
        border-color: var(--accent);
        box-shadow: var(--shadow-md);
        color: var(--primary);
        transform: translateY(-3px);
    }

.download-icon {
    width: 42px;
    height: 42px;
    flex: none;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    color: #fff;
}

.download-info h6 {
    font-size: .92rem;
    margin: 0;
}

.download-info small {
    color: var(--muted);
    font-size: .76rem;
}

.download-arrow {
    margin-left: auto;
    color: var(--accent);
    font-size: 1.05rem;
}

/* ===== News ===== */
.news-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--line);
    height: 100%;
    display: flex;
    flex-direction: column;
    transition: transform .25s, box-shadow .25s;
}

    .news-card:hover {
        transform: translateY(-5px);
        box-shadow: var(--shadow-md);
    }

.news-card-img {
    position: relative;
    height: 118px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.3rem;
    color: rgba(255, 255, 255, .9);
}

.news-img-blue {
    background: linear-gradient(135deg, #0b3d63, #1273ad);
}

.news-img-green {
    background: linear-gradient(135deg, #0d9488, #14b389);
}

.news-img-gold {
    background: linear-gradient(135deg, #b57e14, #eab53d);
}

.news-card-date {
    position: absolute;
    right: 10px;
    bottom: 10px;
    background: rgba(8, 44, 73, .75);
    color: #fff;
    border-radius: 6px;
    font-size: .7rem;
    padding: .18rem .55rem;
    backdrop-filter: blur(4px);
}

.news-card-body {
    padding: 1rem 1.1rem 1.1rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

    .news-card-body h5 {
        font-size: 1rem;
        line-height: 1.35;
    }

    .news-card-body p {
        font-size: .84rem;
        color: var(--muted);
        margin-bottom: .6rem;
        flex: 1;
    }

.news-link {
    font-weight: 700;
    font-size: .85rem;
}

    .news-link i {
        transition: transform .2s;
    }

    .news-link:hover i {
        transform: translateX(4px);
    }

/* ===== Sub Page Hero ===== */



.content-card {
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--line);
    box-shadow: var(--shadow-sm);
    padding: 1.5rem 1.6rem;
    margin-bottom: 1.3rem;
}

    .content-card h4 {
        font-size: 1.42rem;
        padding-bottom: .5rem;
        margin-bottom: 1rem;
        border-bottom: 2px solid var(--accent-soft);
        position: relative;
    }

        .content-card h4::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 60px;
            height: 2px;
            background: var(--accent);
        }

    .content-card p:last-child {
        margin-bottom: 0;
    }

.side-note {
    background: var(--accent-soft);
    border-left: 4px solid var(--accent);
    border-radius: 8px;
    padding: .8rem 1rem;
    font-size: .87rem;
}

.topic-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

    .topic-list li {
        padding: .5rem 0 .5rem 2.1rem;
        position: relative;
        border-bottom: 1px dashed var(--line);
        font-size: .9rem;
    }

        .topic-list li:last-child {
            border-bottom: none;
        }

        .topic-list li::before {
            content: "\F287";
            font-family: "bootstrap-icons";
            position: absolute;
            left: .3rem;
            top: .55rem;
            color: var(--accent);
        }

/* ===== Tables ===== */
.table-brand {
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
    font-size: .9rem;
}

    .table-brand thead th {
        background: linear-gradient(135deg, var(--primary), var(--primary-3));
        color: #fff;
        padding: .7rem .9rem;
        font-size: .84rem;
        letter-spacing: .03em;
    }

        .table-brand thead th:first-child {
            border-radius: 9px 0 0 0;
        }

        .table-brand thead th:last-child {
            border-radius: 0 9px 0 0;
        }

    .table-brand tbody td {
        padding: .65rem .9rem;
        border-bottom: 1px solid var(--line);
        vertical-align: middle;
    }

    .table-brand tbody tr:nth-child(even) {
        background: #f7fafc;
    }

    .table-brand tbody tr:hover {
        background: var(--accent-soft);
    }

/* ===== Committee ===== */
.committee-group {
    margin-bottom: 1.4rem;
}

.committee-role {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary), var(--primary-3));
    color: #fff;
    border-radius: 8px;
    font-size: .85rem;
    font-weight: 700;
    padding: .3rem .95rem;
    margin-bottom: .8rem;
}

.member-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: .7rem;
}

.member-chip {
    display: flex;
    align-items: center;
    gap: .7rem;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: .6rem .8rem;
    transition: all .22s;
}

    .member-chip:hover {
        border-color: var(--accent);
        box-shadow: var(--shadow-sm);
    }

.member-avatar {
    width: 38px;
    height: 38px;
    flex: none;
    border-radius: 50%;
    background: linear-gradient(135deg, #1273ad, #0d9488);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: .8rem;
}

.member-chip strong {
    display: block;
    font-size: .88rem;
    line-height: 1.25;
    color: var(--primary);
}

.member-chip small {
    color: var(--muted);
    font-size: .76rem;
}

/* ===== Program ===== */
.schedule-day {
    margin-bottom: 1.5rem;
}

.schedule-day-header {
    display: flex;
    align-items: center;
    gap: .8rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-3));
    color: #fff;
    border-radius: 10px;
    padding: .6rem 1.1rem;
    margin-bottom: .8rem;
}

    .schedule-day-header .day-num {
        font-size: 1.35rem;
        font-weight: 800;
        line-height: 1;
    }

        .schedule-day-header .day-num small {
            font-size: .7rem;
            font-weight: 600;
            display: block;
            opacity: .8;
        }

    .schedule-day-header h5 {
        color: #fff;
        margin: 0;
        font-size: 1rem;
    }

    .schedule-day-header .day-tag {
        margin-left: auto;
        background: rgba(255, 255, 255, .18);
        border-radius: 50px;
        font-size: .72rem;
        padding: .2rem .7rem;
        white-space: nowrap;
    }

.timeline {
    position: relative;
    padding-left: 1.6rem;
}

    .timeline::before {
        content: "";
        position: absolute;
        left: 6px;
        top: 6px;
        bottom: 6px;
        width: 2px;
        background: linear-gradient(180deg, var(--accent), var(--primary-3));
        border-radius: 2px;
    }

.timeline-item {
    position: relative;
    padding: 0 0 1rem .9rem;
}

    .timeline-item::before {
        content: "";
        position: absolute;
        left: -1.6rem;
        top: .35rem;
        width: 12px;
        height: 12px;
        border-radius: 50%;
        background: var(--accent);
        box-shadow: 0 0 0 4px var(--accent-soft);
    }

    .timeline-item .tl-time {
        font-weight: 800;
        color: var(--primary-3);
        font-size: .82rem;
        font-variant-numeric: tabular-nums;
    }

    .timeline-item .tl-title {
        font-weight: 700;
        font-size: .94rem;
        color: var(--ink);
    }

    .timeline-item .tl-desc {
        font-size: .82rem;
        color: var(--muted);
    }

.tl-badge {
    display: inline-block;
    font-size: .68rem;
    font-weight: 700;
    border-radius: 5px;
    padding: .1rem .5rem;
    margin-left: .3rem;
    vertical-align: middle;
}

.tl-badge-keynote {
    background: #fdf1d7;
    color: #a06a08;
}

.tl-badge-session {
    background: #e3eefa;
    color: #0e5a8a;
}

.tl-badge-social {
    background: #ddf5ec;
    color: #0b7a5c;
}

/* ===== Venue ===== */
.venue-visual {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

    .venue-visual img {
        width: 100%;
        display: block;
    }

.info-row {
    display: flex;
    gap: .8rem;
    padding: .65rem 0;
    border-bottom: 1px dashed var(--line);
    font-size: .9rem;
}

    .info-row:last-child {
        border-bottom: none;
    }

    .info-row i {
        color: var(--accent);
        font-size: 1.05rem;
        margin-top: .15rem;
    }

    .info-row strong {
        display: block;
        font-size: .84rem;
        color: var(--primary);
    }

/* ===== Registration ===== */
.fee-note {
    font-size: .82rem;
    color: var(--muted);
}

.reg-step {
    text-align: center;
    padding: 1rem .6rem;
    background: var(--bg);
    border-radius: 10px;
    border: 1px solid var(--line);
    height: 100%;
}

    .reg-step .step-num {
        width: 34px;
        height: 34px;
        margin: 0 auto .5rem;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--primary), var(--accent-2));
        color: #fff;
        font-weight: 800;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .reg-step h6 {
        font-size: .92rem;
        margin-bottom: .25rem;
    }

    .reg-step p {
        font-size: .78rem;
        color: var(--muted);
        margin: 0;
    }

/* ===== Contact ===== */
.contact-tile {
    text-align: center;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.3rem 1rem;
    height: 100%;
    transition: all .22s;
}

    .contact-tile:hover {
        border-color: var(--accent);
        box-shadow: var(--shadow-md);
        transform: translateY(-4px);
    }

    .contact-tile i {
        font-size: 1.7rem;
        color: var(--accent);
        margin-bottom: .5rem;
        display: block;
    }

    .contact-tile h6 {
        font-size: .98rem;
    }

    .contact-tile p {
        font-size: .85rem;
        color: var(--muted);
        margin: 0;
    }

/* ===== News Page ===== */
.news-item {
    display: flex;
    gap: 1.1rem;
    padding: 1.15rem 0;
    border-bottom: 1px dashed var(--line);
}

    .news-item:last-child {
        border-bottom: none;
    }

.news-item-date {
    flex: none;
    width: 64px;
    background: linear-gradient(160deg, var(--primary), var(--primary-3));
    color: #fff;
    border-radius: 10px;
    text-align: center;
    padding: .45rem 0;
    height: fit-content;
}

    .news-item-date strong {
        display: block;
        font-size: 1.3rem;
        line-height: 1.1;
    }

    .news-item-date small {
        font-size: .68rem;
        letter-spacing: .08em;
        text-transform: uppercase;
    }

.news-item h5 {
    font-size: 1.02rem;
    margin-bottom: .25rem;
}

.news-item p {
    font-size: .87rem;
    color: var(--muted);
    margin: 0;
}

/* ===== Follow Us ===== */
.follow-section {
    background: linear-gradient(135deg, #082c49, #0b3d63 60%, #0d9488);
    color: #fff;
    padding: 2.4rem 0;
    position: relative;
    overflow: hidden;
}

    .follow-section::before {
        content: "";
        position: absolute;
        inset: 0;
        background-image: radial-gradient(rgba(255, 255, 255, .12) 1px, transparent 1px);
        background-size: 22px 22px;
        opacity: .4;
    }

    .follow-section .container {
        position: relative;
    }

.follow-title {
    color: #fff;
    font-size: 1.3rem;
    margin-bottom: .8rem;
}

.follow-links {
    display: flex;
    gap: .8rem;
    justify-content: center;
}

.follow-link {
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .12);
    border: 1px solid rgba(255, 255, 255, .35);
    color: #fff;
    font-size: 1.25rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all .25s;
}

    .follow-link:hover {
        background: #fff;
        color: var(--primary);
        transform: translateY(-4px);
        box-shadow: 0 10px 22px rgba(0, 0, 0, .25);
    }

/* ===== Footer ===== */
.site-footer {
    background: #061f35;
    color: rgba(255, 255, 255, .72);
    padding: 2.6rem 0 1.2rem;
    font-size: .86rem;
}

.footer-logo {
    width: 34px;
    height: 34px;
}

.footer-title {
    color: #fff;
    font-size: .98rem;
    margin-bottom: .8rem;
}

.footer-desc {
    font-size: .84rem;
    line-height: 1.7;
}

.footer-links li {
    margin-bottom: .4rem;
}

.footer-links a {
    color: rgba(255, 255, 255, .72);
    font-size: .86rem;
    transition: color .2s, padding-left .2s;
}

    .footer-links a:hover {
        color: #7ce3c1;
        padding-left: .3rem;
    }

.footer-links i {
    font-size: .7rem;
    color: var(--accent);
}

.footer-contact li {
    margin-bottom: .55rem;
    font-size: .84rem;
}

.footer-contact i {
    color: var(--accent);
    margin-right: .45rem;
}

.footer-divider {
    border-color: rgba(255, 255, 255, .12);
    margin: 1.4rem 0 .9rem;
}

.copyright {
    font-size: .78rem;
    color: rgba(255, 255, 255, .5);
    margin: 0;
}

/* ===== Back to top ===== */
#backToTop {
    position: fixed;
    right: 22px;
    bottom: 26px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent-2));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(11, 61, 99, .35);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all .3s;
    z-index: 1040;
}

    #backToTop.show {
        opacity: 1;
        visibility: visible;
        transform: none;
    }

    #backToTop:hover {
        color: #fff;
        background: linear-gradient(135deg, var(--accent), var(--accent-2));
    }

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
    .site-fullname {
        text-align: left !important;
        margin-top: .5rem;
    }

    .main-nav .navbar-nav {
        padding: .4rem 0;
    }

    .main-nav .nav-link {
        padding: .5rem .8rem;
    }

        .main-nav .nav-link::after {
            display: none;
        }

    .main-nav .dropdown-menu {
        box-shadow: none;
        border: 1px solid var(--line);
    }

    .hero-countdown {
        gap: .4rem;
    }

    .countdown-item {
        min-width: 62px;
    }

    .quick-section {
        margin-top: 0;
    }

    .member-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 575.98px) {
    body {
        font-size: .92rem;
    }

    .hero-content {
        padding: 2.8rem 0 3.2rem;
    }

    .hero-countdown {
        flex-wrap: wrap;
    }

    .site-logo {
        width: 46px;
        height: 46px;
    }

    .welcome-visual img {
        height: 210px;
    }

    .news-item {
        flex-direction: column;
        gap: .6rem;
    }
}

/* ===== Validation / misc ===== */
.field-validation-error {
    color: #d9534f;
    font-size: .8rem;
}

.text-brand-primary {
    color: var(--primary) !important;
}

.text-brand-accent {
    color: var(--accent) !important;
}
@media (min-width: 769px) {
    .bianju {
        padding-left: 80px;
    }
}
/* 汉堡菜单按钮 — 去掉默认边框 */
.navbar-toggler {
    border-color: rgba(255,255,255,0.5) !important;
}

    .navbar-toggler:focus {
        box-shadow: 0 0 0 0.2rem rgba(255,255,255,0.3) !important;
    }

/* 核心修复：把默认深色三横线图标换成白色 */
.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}