/* ==========================================================================
   群屿之陆社区 — 响应式
   断点：1200 / 992 / 768 / 480 / 360
   ========================================================================== */

/* ---------- ≤1200px ---------- */
@media (max-width: 1200px) {
  .container { max-width: 100%; padding-left: 24px; padding-right: 24px; }
  .header_section .container-fluid { padding-right: 20px; padding-left: 20px; }
  .navbar-nav .nav-link { margin: 10px 20px; }
}

/* ---------- ≥993px：导航项真正居中 ----------
   左侧品牌块与右侧「加入我们」按钮宽度不等，用 flex + margin:auto 居中会让 4 个导航项
   相对页面中心整体右偏（实测 +28.5px）。改为让整个折叠层横跨顶栏、在其中居中导航项，
   右侧 CTA 单独绝对定位贴右。 */
@media (min-width: 993px) {
  .navbar-collapse {
    position: absolute;
    left: 0; right: 0;
    top: 0; bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
  }
  .navbar-nav { margin: 0; pointer-events: auto; }
  .nav_cta {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: auto;
  }
  .nav_cta:hover { transform: translateY(calc(-50% - 2px)); }
}

/* ---------- ≤992px：导航折叠 ---------- */
@media (max-width: 992px) {
  .container { padding-left: 20px; padding-right: 20px; }

  .navbar-toggler { display: block; margin-left: auto; }

  .navbar-collapse {
    display: block;
    flex: none;
    position: absolute;
    left: 0; right: 0;
    top: 100%;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .4s ease, opacity .35s ease;
    pointer-events: none;
  }
  .navbar-collapse.show {
    max-height: 420px;
    opacity: 1;
    pointer-events: auto;
  }
  /* 只给导航列表铺深色底板；「加入我们」保持白底深字（原先被一起涂黑，文字几乎看不见） */
  .navbar-collapse.show .navbar-nav {
    background: rgba(8, 8, 14, .92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }
  .navbar-collapse.show .navbar-nav {
    display: block;
    border-radius: 16px;
    padding: 10px 8px;
    margin: 8px 0 0;
  }
  .navbar-nav .nav-link {
    padding: 11px 20px;
    margin: 2px 0;
    border-radius: 10px;
    text-align: center;
    font-size: 15px;
  }
  .navbar-nav .nav-link::after { display: none; }
  .navbar-nav .nav-item.active .nav-link { background: rgba(255, 255, 255, .08); }
  .navbar-collapse.show .nav_cta {
    display: block;
    width: 100%;
    text-align: center;
    margin: 8px 0 0;
    padding: 12px 20px;
    font-size: 15px;
    border-radius: 12px;
  }

  .hero_area { height: auto; min-height: 100vh; min-height: 100dvh; }
  .hero_content { padding: 130px 20px 60px; }
  .hero_title { font-size: clamp(1.8rem, 6vw, 3rem); }

  .feature_row, .feature_reverse {
    flex-direction: column;
    gap: 30px;
    margin-bottom: 64px;
  }
  .feature_media { width: 100%; flex: none; height: 260px; }
  .feature_info p { max-width: none; }

  .join_card { flex: none; width: 100%; }
  .page_head { padding: 130px 0 52px; }

  .live_inner {
    flex-direction: column;
    align-items: stretch;
    gap: 26px;
  }
  .live_right { flex: none; }
  .live_cd { justify-content: flex-start; }
  .live_left p { max-width: none; }
}

/* ---------- ≤768px ---------- */
@media (max-width: 768px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .header_section .container-fluid { padding-right: 14px; padding-left: 14px; }

  .navbar-brand img { width: auto; height: 28px; }
  .navbar-brand span { font-size: 15px; }
  .navbar-brand small { display: none; }

  .hero_content { padding: 120px 16px 56px; }
  .hero_title { font-size: clamp(1.6rem, 7vw, 2.4rem); letter-spacing: 1px; }
  .hero_subtitle { font-size: .92rem; }
  .hero_eyebrow { font-size: 11px; letter-spacing: 3px; }
  .hero_join_btn { padding: 10px 26px; font-size: 13px; }
  .btn_solid, .btn_ghost { padding: 11px 24px; font-size: 14px; }

  .hero_ip_bar {
    flex-direction: column;
    gap: 8px;
    padding: 10px 14px;
    border-radius: 40px;
    margin: 0 16px;
    max-width: calc(100% - 32px);
  }
  .hero_ip_text { font-size: 13px; letter-spacing: 1.5px; }
  .hero_ip_btn { padding: 8px 18px; font-size: 13px; width: 100%; justify-content: center; }
  .hero_ip_tip { font-size: 11px; margin-top: 10px; padding: 0 16px; }
  .hero_timer { font-size: 10.5px; padding: 0 12px; }
  .hero_bottom { padding-bottom: 24px; }
  .hero_wave { height: 120px; }
  .hero_wave_2 { height: 88px; }

  .section { padding: 56px 0; }
  .section_header { margin-bottom: 32px; }
  .section_header h2 { font-size: clamp(1.5rem, 5vw, 2rem); }
  .section_header p { font-size: .9rem; }
  .section_tag { font-size: 12px; }

  .page_head { padding: 118px 0 44px; }
  .page_head p { font-size: .92rem; }

  .feature_row, .feature_reverse { gap: 24px; margin-bottom: 48px; }
  .feature_media { height: 220px; border-radius: 12px; }
  .feature_index { font-size: 48px; margin-bottom: -18px; }
  .feature_info h3 { font-size: 1.2rem; }
  .feature_info p, .feature_info li { font-size: .88rem; }

  .stat_grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stat_card { padding: 22px 14px; }
  .stat_value { font-size: 1.6rem; }
  .stat_label { font-size: .74rem; }

  .event_grid { grid-template-columns: 1fr; gap: 16px; }
  .event_body { padding: 16px; }
  .event_title { font-size: 1rem; }

  .filter_bar { padding: 14px 16px; gap: 12px; }
  .filter_row { gap: 8px; }
  .filter_label { min-width: 100%; font-size: 11px; }
  .pill { padding: 6px 13px; font-size: 12.5px; }
  .filter_search { min-width: 100%; }
  .filter_result { font-size: 12.5px; }

  .modal_overlay { padding: 20px 12px; }
  .modal_cover { aspect-ratio: 16 / 9; }
  .modal_head { margin-top: -46px; padding: 0 20px 20px; }
  .modal_meta { grid-template-columns: 1fr 1fr; }
  .modal_meta_item { padding: 13px 16px; }
  .modal_body { padding: 22px 20px 26px; }
  .modal_body p { font-size: .9rem; }
  .gallery_grid { grid-template-columns: 1fr 1fr; }

  /* 图集灯箱：窄屏把按钮收小、贴近边缘，给图留更多空间 */
  .lightbox { padding: 3vh 3vw; }
  .lightbox_img { max-width: 94vw; max-height: 78vh; }
  .lightbox_close { top: 12px; right: 12px; width: 38px; height: 38px; font-size: 22px; }
  .lightbox_nav { width: 38px; height: 38px; }
  .lightbox_prev { left: 10px; }
  .lightbox_next { right: 10px; }
  .lightbox_count { bottom: 12px; font-size: 12px; }

  .join_cards { gap: 14px; }
  .join_card { padding: 28px 20px; border-radius: 14px; }
  .join_card_icon { width: 48px; height: 48px; margin-bottom: 16px; }
  .join_card_icon img, .join_card_icon svg { width: 24px; height: 24px; }
  .join_card_icon img.no-filter { width: 40px; height: 40px; }
  .join_card h4 { font-size: 1rem; }
  .join_card code { font-size: 13px; margin-bottom: 18px; }
  .join_copy_btn { padding: 10px 24px; font-size: 13px; }

  .member_grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .member_card { padding: 20px 12px; }
  .member_card img, .member_avatar_placeholder { width: 62px; height: 62px; }
  .member_links img { width: 24px; height: 24px; }

  .timeline { padding-left: 26px; }
  .timeline_item::before { left: -26px; width: 12px; height: 12px; }
  .rule_item { padding: 18px; gap: 12px; }

  .footer_links { gap: 20px; }
  .footer_links a { font-size: 13px; }
  .footer_copy { font-size: 11.5px; }

  .live_section { padding-top: 40px; }
  .live_head { margin-bottom: 14px; }
  .live_inner { padding: 22px 18px; gap: 22px; }
  .live_flag { font-size: 11px; letter-spacing: 1.5px; }
  .live_left h3 { font-size: 1.2rem; }
  .live_left p { font-size: .88rem; }
  .live_cd_unit { min-width: 50px; padding: 8px 4px 6px; }
  .live_cd_unit b { font-size: 1.2rem; }
  .live_cd_unit small { font-size: 9px; }
  .live_actions { flex-direction: column; }
  .live_actions .btn_solid,
  .live_actions .btn_ghost { padding: 10px 20px; font-size: 13px; width: 100%; justify-content: center; }
}

/* ---------- ≤480px ---------- */
@media (max-width: 480px) {
  .container { padding-left: 14px; padding-right: 14px; }

  .hero_title { font-size: 1.5rem; letter-spacing: .5px; }
  .hero_subtitle { font-size: .86rem; }
  .hero_join_btn { padding: 10px 24px; font-size: 12.5px; }
  .btn_solid, .btn_ghost { justify-content: center; width: 100%; }
  .hero_ip_text { font-size: 12px; letter-spacing: 1px; }
  .hero_ip_btn { padding: 8px 14px; font-size: 12px; }

  .feature_media { height: 180px; border-radius: 10px; }
  .feature_index { font-size: 40px; margin-bottom: -14px; }
  .feature_info h3 { font-size: 1.1rem; }
  .feature_info p, .feature_info li { font-size: .84rem; }

  .stat_grid { gap: 10px; }
  .stat_card { padding: 18px 10px; }
  .stat_value { font-size: 1.35rem; }
  .stat_label { font-size: .68rem; letter-spacing: 0; }

  .section_header h2 { font-size: 1.4rem; }
  .section_header p { font-size: .84rem; }

  .event_cover { aspect-ratio: 16 / 10; }
  .join_copy_btn { padding: 9px 20px; font-size: 12.5px; width: 100%; }
  .member_grid { grid-template-columns: 1fr; gap: 12px; }
  .member_card h5 { font-size: .86rem; }
  .member_card span { font-size: 11px; }

  .modal_overlay { padding: 12px 8px; }
  .modal_head { padding: 0 16px 18px; }
  .modal_meta { grid-template-columns: 1fr; }
  .modal_body { padding: 20px 16px 24px; }
  .gallery_grid { grid-template-columns: 1fr; }
  .lightbox_nav { width: 34px; height: 34px; }
  .lightbox_prev { left: 6px; }
  .lightbox_next { right: 6px; }
  .modal_links { flex-direction: column; }

  /* 免责声明：窄屏收紧内边距、按钮拉满宽度，减少内部滚动 */
  .disclaimer_overlay { padding: 14px; }
  .disclaimer_box { padding: 26px 20px 22px; border-radius: 16px; max-height: calc(100vh - 28px); }
  .disclaimer_list { font-size: .78rem; line-height: 1.8; padding-left: 16px; }
  .disclaimer_note { margin-bottom: 14px; }
  .disclaimer_btn { width: 100%; padding: 11px 20px; }

  /* 开发中占位 */
  .wip_state { padding: 44px 16px 58px; }
  .wip_icon { width: 72px; height: 72px; margin-bottom: 22px; }
  .wip_state h2 { font-size: 1.25rem; }
  .modal_link { justify-content: center; }

  .rule_list { grid-template-columns: 1fr; }
  .contact_row { flex-direction: column; }
  .contact_item { justify-content: center; }

  .footer_links { gap: 16px; }
  .footer_links a { font-size: 12px; }
  .footer_copy { font-size: 10.5px; }
}

/* ---------- ≤360px ---------- */
@media (max-width: 360px) {
  .hero_title { font-size: 1.32rem; }
  .hero_subtitle { font-size: .8rem; }
  .hero_eyebrow { font-size: 10px; letter-spacing: 2px; }
  .navbar-brand span { font-size: 13.5px; }
  .feature_media { height: 150px; }
  .stat_grid { grid-template-columns: 1fr; }
  .pill { padding: 5px 11px; font-size: 12px; }
}

/* ==========================================================================
   通栏图文（关于我们）—— 放在最后，覆盖上面的通用规则
   --gutter 必须始终等于 .container 的内容左边缘，通栏才和上下板块左右对齐。
   各断点下的 .container 值见本文件顶部（>1200 为 1140 居中，其余为全宽 + 内边距）。
   ========================================================================== */
@media (max-width: 1200px) {
  .band_section { --gutter: 24px; }
}

@media (max-width: 992px) {
  .band_section {
    --gutter: 20px;
    padding-bottom: clamp(40px, 8vw, 64px);
  }

  /* 窄屏改为上下堆叠、图在上文字在下；关掉渐变过渡，否则淡出会吃掉太多画面。
     交替顺序在单列里没有意义，所以正反两种行统一成同一顺序。 */
  .band_row,
  .band_row.band_reverse {
    flex-direction: column-reverse;
    min-height: 0;
  }

  .band_text,
  .band_row.band_reverse .band_text {
    flex: none;
    max-width: 100%;
    padding: clamp(32px, 6vw, 46px) var(--gutter);
  }

  .band_media {
    flex: none;
    max-width: 100%;
    height: clamp(220px, 52vw, 340px);
    -webkit-mask-image: none;
            mask-image: none;
  }

  .band_text p { max-width: none; }
}

@media (max-width: 768px) {
  .band_section { --gutter: 16px; }
  .band_index { font-size: 30px; margin-bottom: 8px; }
  .band_text h3 { font-size: 1.25rem; }
  .band_text p { font-size: .9rem; }
  .band_media { height: clamp(200px, 50vw, 280px); }
}

@media (max-width: 480px) {
  .band_section { --gutter: 14px; }
  .band_media { height: clamp(180px, 56vw, 240px); }
}