/* =========================================================
     HKSTIRI - 香港科学技术创新研究院 样式表
     Light theme · professional academic style
     ========================================================= */

:root {
    --c-primary: #0e2f5c;
    --c-primary-2: #1a4480;
    --c-accent: #2563a8;
    --c-gold: #c9a55c;
    --c-text: #1f2937;
    --c-text-2: #4b5563;
    --c-muted: #6b7280;
    --c-bg: #ffffff;
    --c-bg-2: #f6f8fb;
    --c-bg-3: #eef2f7;
    --c-border: #e2e8f0;
    --c-grad-1: linear-gradient(135deg, #0e2f5c 0%, #1a4480 45%, #2563a8 100%);
    --c-grad-2: linear-gradient(135deg, #0e2f5c 0%, #6d4ca8 100%);
    --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
    --shadow-md: 0 6px 18px rgba(15,42,90,.08);
    --shadow-lg: 0 18px 40px rgba(15,42,90,.12);
    --radius: 10px;
    --radius-lg: 16px;
    --transition: all .25s ease;
    --font: "PingFang SC","Microsoft YaHei","Helvetica Neue","Segoe UI",Arial,sans-serif;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.7;
    color: var(--c-text);
    background: var(--c-bg);
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--c-primary); }
ul, ol { margin-left: 1.2em; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }

/* ===== Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--c-border);
    box-shadow: var(--shadow-sm);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    max-width: 1320px;
    margin: 0 auto;
    gap: 24px;
}
.brand { display: flex; align-items: center; gap: 14px; min-width: 0; }
.brand-logo {
    height: 52px;
    width: auto;
    display: block;
    flex-shrink: 0;
    transition: opacity var(--transition);
}
.brand:hover .brand-logo { opacity: 0.85; }
.brand-text { line-height: 1.25; min-width: 0; }
.brand-text .main {
    font-size: 18px;
    font-weight: 700;
    color: var(--c-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 540px;
}
.brand-text .sub {
    font-size: 12px;
    color: var(--c-muted);
    margin-top: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 540px;
}

/* ===== Navigation ===== */
.main-nav { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.main-nav > li { list-style: none; }
.main-nav a {
    display: block;
    padding: 8px 14px;
    color: var(--c-text);
    font-size: 14.5px;
    font-weight: 500;
    border-radius: 6px;
    transition: var(--transition);
    white-space: nowrap;
}
.main-nav a:hover,
.main-nav a.active {
    color: var(--c-primary);
    background: var(--c-bg-3);
}

/* Sub-navigation dropdown */
.main-nav li.has-sub { position: relative; }
.main-nav li.has-sub > a { cursor: default; }
.main-nav .sub-nav {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    min-width: 200px;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(15, 32, 68, 0.12);
    padding: 8px 0;
    display: none;
    z-index: 100;
}
.main-nav li.has-sub:hover > .sub-nav,
.main-nav li.has-sub.open > .sub-nav { display: block; }
.main-nav .sub-nav li { list-style: none; }
.main-nav .sub-nav a {
    display: block;
    padding: 10px 18px;
    font-size: 14px;
    color: var(--c-text);
    white-space: nowrap;
    border-radius: 0;
}
.main-nav .sub-nav a:hover,
.main-nav .sub-nav a.active {
    background: var(--c-bg-3);
    color: var(--c-primary);
}
.main-nav li.has-sub.active > a { color: var(--c-primary); }

.nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--c-border);
    border-radius: 6px;
    padding: 8px 10px;
    cursor: pointer;
    color: var(--c-primary);
}

/* ===== Language Switcher ===== */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
    padding: 6px 4px;
}
.lang-switch button {
    background: transparent;
    border: 1px solid var(--c-border);
    color: var(--c-text);
    font-size: 13px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 14px;
    cursor: pointer;
    transition: var(--transition);
    line-height: 1;
    min-width: 30px;
}
.lang-switch button:hover {
    color: var(--c-primary);
    border-color: var(--c-primary);
}
.lang-switch button.active {
    background: var(--c-primary);
    border-color: var(--c-primary);
    color: #fff;
}
@media (max-width: 720px) {
    .lang-switch button { padding: 6px 8px; font-size: 12px; }
}

/* ===== Hero / Banner ===== */
.hero {
    position: relative;
    min-height: 520px;
    background: var(--c-grad-1);
    color: #fff;
    overflow: hidden;
    display: flex;
    align-items: center;
}
.hero::before {
    content:"";
    position: absolute; inset:0;
    background:
        radial-gradient(900px 500px at 75% 50%, rgba(201,165,92,.18), transparent 70%),
        radial-gradient(700px 400px at 15% 90%, rgba(109,76,168,.25), transparent 70%);
    pointer-events: none;
}
.hero::after {
    content:"";
    position: absolute; inset:0;
    background-image:
        linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
    pointer-events: none;
}
.hero-inner {
    position: relative; z-index: 2;
    max-width: 1240px; margin: 0 auto; padding: 80px 24px;
    width: 100%;
}
.hero-eyebrow {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(201,165,92,.18);
    border: 1px solid rgba(201,165,92,.4);
    border-radius: 999px;
    font-size: 13px;
    letter-spacing: .5px;
    margin-bottom: 20px;
    color: #f5d896;
}
.hero h1 {
    font-size: 54px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 18px;
    letter-spacing: 1px;
}
.hero .sub-names {
    font-size: 22px;
    font-weight: 500;
    opacity: .88;
    line-height: 1.7;
    margin-bottom: 28px;
}
.hero .sub-names span { display:block; }
.hero .desc {
    font-size: 16px;
    max-width: 720px;
    line-height: 1.85;
    opacity: .9;
    margin-bottom: 32px;
}
.hero .actions { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
    display: inline-block;
    padding: 12px 26px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}
.btn-primary { background: var(--c-gold); color: #1c1c1c; }
.btn-primary:hover { background: #d6b56b; color: #1c1c1c; transform: translateY(-2px); }
.btn-ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.5); }
.btn-ghost:hover { background: rgba(255,255,255,.12); color: #fff; }
.btn-outline { background: transparent; color: var(--c-primary); border: 1px solid var(--c-primary); }
.btn-outline:hover { background: var(--c-primary); color: #fff; }

/* ===== Page header (inner pages) ===== */
.page-hero {
    background: var(--c-grad-1);
    color: #fff;
    padding: 70px 0 50px;
    position: relative;
    overflow: hidden;
}
.page-hero::after {
    content:""; position: absolute; inset:0;
    background: radial-gradient(700px 300px at 80% 0%, rgba(201,165,92,.2), transparent 70%);
    pointer-events:none;
}
.page-hero h1 {
    font-size: 38px;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
}
.page-hero .breadcrumb {
    font-size: 14px;
    opacity: .85;
    position: relative;
}
.page-hero .breadcrumb a { color: #f5d896; }

/* ===== Sections ===== */
section.block { padding: 64px 0; }
section.block.alt { background: var(--c-bg-2); }
.page-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    justify-content: center;
    margin: 36px auto 12px;
    padding-top: 28px;
    border-top: 1px dashed var(--c-border);
}
.page-actions .btn { padding: 10px 22px; font-size: 14px; }
.section-head { text-align: center; margin-bottom: 48px; }
.section-head .eyebrow {
    display: inline-block;
    padding: 5px 14px;
    background: rgba(37,99,168,.1);
    color: var(--c-accent);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .5px;
    margin-bottom: 14px;
}
.section-head h2 {
    font-size: 34px;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 14px;
}
.section-head p {
    color: var(--c-text-2);
    max-width: 720px;
    margin: 0 auto;
    font-size: 15.5px;
    line-height: 1.8;
}

/* ===== Cards ===== */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--c-accent);
}
.card .icon {
    width: 52px; height: 52px;
    border-radius: 12px;
    background: var(--c-bg-3);
    color: var(--c-primary);
    display: grid; place-items: center;
    font-size: 24px;
    margin-bottom: 18px;
}
.card h3 {
    font-size: 18px;
    color: var(--c-primary);
    margin-bottom: 10px;
    font-weight: 700;
}
.card p {
    color: var(--c-text-2);
    font-size: 14.5px;
    line-height: 1.7;
}

/* ===== About text block ===== */
.prose {
    max-width: 920px;
    margin: 0 auto;
    font-size: 16px;
    line-height: 1.95;
    color: var(--c-text);
}
.prose p { margin-bottom: 18px; }
.prose h3 {
    font-size: 22px;
    color: var(--c-primary);
    margin: 36px 0 16px;
    font-weight: 700;
    padding-left: 14px;
    border-left: 4px solid var(--c-gold);
}
.prose ul, .prose ol { margin-bottom: 18px; }
.prose li { margin-bottom: 8px; }
.prose strong { color: var(--c-primary); }

/* ===== News / notices list (no-thumbnail design) ===== */
.post-list { display: grid; gap: 14px; }
.post-item {
    display: grid;
    grid-template-columns: 96px 1fr 32px;
    align-items: stretch;
    background: #fff;
    border: 1px solid var(--c-border);
    border-left: 3px solid transparent;
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.post-item:hover {
    border-color: var(--c-accent);
    border-left-color: var(--c-accent);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}
.post-date {
    background: linear-gradient(135deg, var(--c-bg-3) 0%, var(--c-bg-2) 100%);
    text-align: center;
    padding: 18px 8px;
    color: var(--c-primary);
    border-right: 1px solid var(--c-border);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
}
.post-date-y {
    font-size: 12px;
    color: var(--c-muted);
    font-weight: 600;
    letter-spacing: 1.5px;
}
.post-date-md {
    font-size: 19px;
    font-weight: 800;
    color: var(--c-accent);
    line-height: 1;
    letter-spacing: 0.5px;
}
.post-body {
    padding: 16px 22px;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
}
.post-tagline {
    display: flex;
    gap: 10px;
    align-items: center;
    color: var(--c-muted);
    font-size: 12.5px;
}
.post-divider { color: var(--c-border); }
.post-tag {
    background: var(--c-bg-3);
    color: var(--c-accent);
    padding: 2px 10px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}
.post-title {
    font-size: 16.5px;
    color: var(--c-primary);
    font-weight: 700;
    line-height: 1.45;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.post-summary {
    color: var(--c-text-2);
    font-size: 13.5px;
    line-height: 1.65;
    margin: 4px 0 0 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.post-arrow {
    align-self: center;
    padding-right: 22px;
    color: var(--c-accent);
    font-size: 22px;
    font-weight: 700;
}

/* ===== Article detail ===== */
.article {
    max-width: 920px;
    margin: 0 auto;
}
.article h1 {
    font-size: 30px;
    color: var(--c-primary);
    margin-bottom: 14px;
    font-weight: 700;
    line-height: 1.4;
}
.article .meta {
    color: var(--c-muted);
    font-size: 14px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--c-border);
}
.article .body { font-size: 16px; line-height: 1.9; color: var(--c-text); }
.article .body p { margin-bottom: 14px; }
.article .body h3 {
    font-size: 20px;
    color: var(--c-primary);
    margin: 28px 0 12px;
    padding-left: 12px;
    border-left: 4px solid var(--c-gold);
}
.article .body ul, .article .body ol { margin: 12px 0 18px 1.4em; }
.article .body li { margin-bottom: 6px; }
.article .body strong { color: var(--c-primary); }
.article .body img {
    margin: 18px auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    max-width: 100%;
}
.article .body img.full { width: 100%; }
.article .cover {
    margin-bottom: 24px;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

/* ===== People cards ===== */
.person-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    height: 100%;
}
.person-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}
.person-card .name {
    font-size: 19px;
    color: var(--c-primary);
    font-weight: 700;
    margin-bottom: 4px;
}
.person-card .title {
    color: var(--c-accent);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 14px;
}
.person-card .org {
    color: var(--c-text-2);
    font-size: 14px;
    margin-bottom: 14px;
    font-weight: 600;
}
.person-card p {
    font-size: 14.5px;
    line-height: 1.75;
    color: var(--c-text-2);
}
.person-card .research {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px dashed var(--c-border);
    color: var(--c-primary);
    font-size: 13.5px;
    font-weight: 600;
}

/* ===== Org-group (模块化组织人员区) ===== */
.org-group {
    margin-top: 48px;
}
.org-group:first-of-type { margin-top: 0; }
.org-group-head {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 2px solid var(--c-bg-2);
}
.org-group-icon {
    font-size: 36px;
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--c-bg-2), #fff);
    border-radius: 14px;
    box-shadow: var(--shadow-sm);
}
.org-group-meta h3 {
    font-size: 22px;
    color: var(--c-primary);
    margin: 0 0 6px;
    font-weight: 700;
}
.org-group-meta p {
    color: var(--c-muted);
    font-size: 14.5px;
    line-height: 1.7;
    margin: 0;
}

/* ===== Tabs ===== */
.tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 36px;
    border-bottom: 2px solid var(--c-border);
    flex-wrap: wrap;
}
.tab {
    padding: 12px 24px;
    cursor: pointer;
    color: var(--c-text-2);
    font-weight: 600;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    transition: var(--transition);
}
.tab.active, .tab:hover {
    color: var(--c-primary);
    border-bottom-color: var(--c-primary);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ===== Contact ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 40px;
    align-items: start;
}
.contact-info {
    background: var(--c-grad-1);
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 36px;
}
.contact-info h3 { font-size: 22px; margin-bottom: 18px; }
.contact-info .item {
    display: flex; gap: 14px;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,.15);
}
.contact-info .item:last-child { border-bottom: 0; }
.contact-info .icon {
    width: 38px; height: 38px;
    background: rgba(255,255,255,.12);
    border-radius: 8px;
    display: grid; place-items: center;
    flex-shrink: 0;
    font-size: 16px;
}
.contact-info .label {
    font-size: 12px;
    opacity: .75;
    margin-bottom: 2px;
}
.contact-info .value { font-size: 15px; line-height: 1.5; }

.contact-form {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-sm);
}
.contact-form .field { margin-bottom: 18px; }
.contact-form label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--c-text);
}
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--c-border);
    border-radius: 8px;
    font: inherit;
    font-size: 14.5px;
    transition: var(--transition);
    background: var(--c-bg-2);
}
.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--c-accent);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(37,99,168,.12);
}
.contact-form textarea { resize: vertical; min-height: 110px; }

/* ===== QR Code Panel (Contact page) ===== */
.qr-panel {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-sm);
    text-align: center;
}
.qr-panel .qr-tip {
    font-size: 14px;
    color: var(--c-text-light);
    margin-bottom: 22px;
    line-height: 1.6;
}
.qr-cards {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
    margin-bottom: 18px;
}
.qr-card {
    background: linear-gradient(180deg, #fafbfc 0%, #f5f6f8 100%);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: 22px 14px 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform .25s ease, box-shadow .25s ease;
}
.qr-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--c-primary);
}
.qr-img-wrap {
    width: 168px;
    height: 168px;
    background: #fff;
    border: 1px dashed var(--c-border);
    border-radius: 10px;
    display: grid;
    place-items: center;
    overflow: hidden;
    margin-bottom: 14px;
    position: relative;
}
.qr-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}
.qr-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: repeating-linear-gradient(45deg, #f7f9fc, #f7f9fc 8px, #eef2f7 8px, #eef2f7 16px);
    color: var(--c-text-light);
    font-size: 13px;
    line-height: 1.6;
}
.qr-placeholder .ph-icon { font-size: 32px; margin-bottom: 8px; }
.qr-placeholder .ph-text span { font-size: 12px; color: var(--c-primary); }
.qr-card .qr-label {
    font-size: 15px;
    font-weight: 700;
    color: var(--c-primary);
    margin-bottom: 4px;
}
.qr-card .qr-sub {
    font-size: 12px;
    color: var(--c-text-light);
}
.qr-foot {
    margin-top: 14px;
    font-size: 11px;
    color: #98a2b8;
    line-height: 1.6;
}
.qr-foot code {
    background: #f1f4f9;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    color: var(--c-primary);
    font-family: ui-monospace, "SF Mono", Consolas, monospace;
}
@media (max-width: 600px) {
    .qr-cards { grid-template-columns: 1fr; }
    .qr-img-wrap { width: 180px; height: 180px; }
}

/* ===== Footer ===== */
.site-footer {
    background: #0a2447;
    color: #cbd5e1;
    padding: 56px 0 20px;
    margin-top: 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
    gap: 36px;
    margin-bottom: 36px;
}
.footer-col h4 {
    color: #fff;
    font-size: 15px;
    margin-bottom: 16px;
    font-weight: 600;
}
.footer-col ul { list-style: none; margin: 0; }
.footer-col li { margin-bottom: 8px; }
.footer-col:nth-child(2) ul { column-count: 2; column-gap: 16px; }
.footer-col:nth-child(2) li { break-inside: avoid; }
.footer-col a { color: #cbd5e1; font-size: 14px; }
.footer-col a:hover { color: var(--c-gold); }
.footer-brand {
    font-size: 17px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}
.footer-brand .sm-name {
    color: var(--c-gold);
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-top: 4px;
    line-height: 1.6;
}
.footer-desc {
    font-size: 13.5px;
    line-height: 1.7;
    color: #93a3b8;
    margin-bottom: 16px;
}
.footer-info {
    font-size: 13px;
    line-height: 1.8;
    color: #93a3b8;
}
.footer-info strong { color: #fff; font-weight: 600; }

/* ===== Forum CTA Banner ===== */
.forum-cta {
    display: block;
    margin-top: 32px;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 8px 28px rgba(15, 32, 68, 0.14);
    transition: transform .25s ease, box-shadow .25s ease;
    position: relative;
}
.forum-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 38px rgba(15, 32, 68, 0.22);
}
.forum-cta::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 14px;
    border: 2px solid transparent;
    transition: border-color .25s ease;
    pointer-events: none;
}
.forum-cta:hover::after { border-color: var(--c-gold); }
.forum-cta img {
    width: 100%;
    height: auto;
    display: block;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.1);
    padding-top: 20px;
    font-size: 13px;
    text-align: center;
    color: #93a3b8;
}

/* ===== Responsive ===== */
@media (max-width: 980px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 36px; }
    .hero .sub-names { font-size: 17px; }
    .post-item { grid-template-columns: 84px 1fr 28px; }
    .post-date-md { font-size: 17px; }
    .section-head h2 { font-size: 26px; }
}
@media (max-width: 720px) {
    .header-inner { padding: 10px 16px; }
    .nav-toggle { display: block; }
    .main-nav {
        display: none;
        position: absolute;
        top: 100%; left: 0; right: 0;
        background: #fff;
        border-top: 1px solid var(--c-border);
        flex-direction: column;
        padding: 8px;
        box-shadow: var(--shadow-md);
    }
    .main-nav.open { display: flex; }
    .main-nav a { padding: 10px 14px; }
    .main-nav .sub-nav {
        position: static;
        box-shadow: none;
        border: none;
        background: var(--c-bg-2);
        border-radius: 6px;
        padding: 4px 0;
        margin: 4px 0 4px 12px;
        min-width: 0;
    }
    .main-nav li.has-sub:hover > .sub-nav { display: none; }
    .main-nav li.has-sub.open > .sub-nav { display: block; }
    .main-nav .sub-nav a { padding: 8px 16px; }
    .brand-text .main { font-size: 15px; max-width: 220px; }
    .brand-text .sub { font-size: 11px; max-width: 220px; }
    .brand-logo { height: 42px; }
    .hero-inner { padding: 56px 20px; }
    .hero { min-height: 460px; }
    .hero h1 { font-size: 28px; }
    .hero .sub-names { font-size: 14px; }
    .hero .desc { font-size: 14px; }
    .page-hero { padding: 48px 0 36px; }
    .page-hero h1 { font-size: 26px; }
    section.block { padding: 44px 0; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .org-group-head { gap: 12px; margin-bottom: 20px; }
    .org-group-icon { width: 48px; height: 48px; font-size: 28px; border-radius: 10px; }
    .org-group-meta h3 { font-size: 18px; }
    .org-group-meta p { font-size: 13.5px; }
    .post-item { grid-template-columns: 72px 1fr; }
    .post-arrow { display: none; }
    .post-date { flex-direction: row; gap: 6px; padding: 12px 8px; align-items: baseline; justify-content: center; }
    .post-date-y { font-size: 11px; letter-spacing: 1px; }
    .post-date-md { font-size: 14px; }
    .footer-grid { grid-template-columns: 1fr; }
    .article h1 { font-size: 22px; }
    .contact-form, .contact-info { padding: 24px; }
}