:root {
  color-scheme: dark;
  --bg: #000;
  --panel: #1d1d1f;
  --text: #f5f5f7;
  --muted: #a1a1a6;
  --line: #424245;
  --blue: #2997ff;
  font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, textarea, select { font: inherit; }
button { cursor: pointer; }
button, a, input, textarea, select { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid #2997ff; outline-offset: 4px; }
header { border-bottom: 1px solid #ffffff24; background: #161617ee; }
.header-inner { max-width: 1044px; min-height: 64px; margin: auto; padding: 14px 32px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; flex-shrink: 0; align-items: center; }
.brand img { display: block; width: 128px; height: auto; }
nav { display: flex; align-items: center; gap: 28px; font-size: 12px; }
nav a { color: #e8e8ed; white-space: nowrap; }
nav button { color: var(--text); background: none; border: 0; border-left: 1px solid var(--line); padding: 4px 0 4px 22px; min-height: 28px; }
main { max-width: 1044px; min-height: calc(100vh - 155px); padding: 48px 32px 96px; margin: auto; }
h1 { font-size: clamp(32px, 4vw, 48px); line-height: 1.18; font-weight: 600; letter-spacing: -.025em; margin: 24px 0; }
h2 { font-size: 28px; line-height: 1.25; font-weight: 600; letter-spacing: -.015em; margin: 0 0 20px; }
h3 { font-size: 21px; line-height: 1.4; font-weight: 600; }
.intro { color: var(--muted); font-size: 21px; line-height: 1.5; max-width: 680px; margin: 0 0 36px; }
.back { display: inline-flex; align-items: center; justify-content: center; font-size: 14px; }
.help-hero { text-align: center; padding: 32px 0 60px; }
.help-hero h1 { font-size: clamp(32px, 4.5vw, 56px); margin: 20px 0 36px; letter-spacing: -.025em; }
.home-page { padding-top: 44px; }
.search { position: relative; margin: 28px 0 20px; }
.search input { padding: 18px 48px; min-height: 60px; border-radius: 12px; font-size: 19px; background: #161617; border-color: #6e6e73; }
.search::before { content: ""; width: 14px; height: 14px; border: 2px solid #a1a1a6; border-radius: 50%; position: absolute; left: 20px; top: 21px; pointer-events: none; }
.search::after { content: ""; width: 7px; height: 2px; background: #a1a1a6; position: absolute; left: 32px; top: 36px; transform: rotate(45deg); pointer-events: none; }
.help-hero .search, .help-hero #search-results { max-width: 640px; margin-left: auto; margin-right: auto; text-align: left; }
.help-hero #search-results:empty { display: none; }
.quick-guide { display: inline-block; font-size: 17px; margin-top: 6px; }
.quick-guide span, .card-link > span { margin-left: 5px; }
.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.card { display: flex; align-items: center; gap: 20px; background: var(--panel); border-radius: 18px; padding: 28px; color: var(--text); transition: background .18s; }
.card:hover { background: #242426; text-decoration: none; }
.card strong { display: block; font-size: 21px; font-weight: 600; margin: 0 0 8px; }
.card p { color: var(--muted); font-size: 15px; line-height: 1.5; margin: 0; }
.card .arrow { margin-left: auto; color: #86868b; font-size: 24px; }
.icon { width: 36px; height: 36px; object-fit: contain; flex-shrink: 0; }
.hero-card { text-align: center; align-items: center; flex-direction: column; gap: 22px; min-height: 270px; padding: 36px 24px; border-radius: 22px; }
.hero-card .icon { width: 46px; height: 46px; }
.hero-card strong { font-size: 26px; margin-bottom: 12px; }
.hero-card p { font-size: 17px; }
.card-link { color: var(--blue); font-size: 17px; margin-top: auto; }
.hero-card:hover .card-link { text-decoration: underline; }
.group-label { margin: 44px 0 18px; color: var(--muted); font-size: 17px; font-weight: 600; }
.muted { color: var(--muted); line-height: 1.6; }
.banner { display: flex; gap: 20px; align-items: center; max-width: 760px; margin: 32px 0 48px; padding: 24px; border-radius: 18px; background: var(--panel); color: var(--text); }
.banner:hover { text-decoration: none; background: #242426; }
.banner strong { display: block; font-size: 19px; font-weight: 600; margin-bottom: 8px; }
.banner span { font-size: 15px; line-height: 1.5; color: var(--blue); }
.form, #reply-form { max-width: 760px; }
label { display: block; font-size: 17px; margin: 28px 0 10px; font-weight: 500; }
input, textarea, select { width: 100%; padding: 15px 16px; border: 1px solid #6e6e73; border-radius: 12px; background: #161617; color: var(--text); line-height: 1.5; }
input::placeholder, textarea::placeholder { color: #86868b; opacity: 1; }
textarea { min-height: 168px; resize: vertical; }
.hint { font-size: 13px; line-height: 1.65; color: var(--muted); margin: 10px 0; }
.check { display: flex; align-items: flex-start; gap: 10px; font-size: 15px; font-weight: 400; }
.check input { width: 18px; height: 18px; margin: 2px 0 0; accent-color: #0071e3; }
.primary { display: inline-flex; justify-content: center; align-items: center; border: 0; background: #0071e3; color: #fff; border-radius: 24px; padding: 12px 24px; min-height: 44px; font-weight: 400; font-size: 17px; }
.primary:hover { background: #0077ed; text-decoration: none; }
.pill { display: inline-flex; align-items: center; justify-content: center; padding: 10px 18px; min-height: 42px; border: 1px solid #6e6e73; border-radius: 24px; background: none; color: var(--text); font-size: 15px; }
.primary.pill { background: #0071e3; border-color: transparent; }
button:disabled { opacity: .5; cursor: default; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 28px; }
.attachments { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }
.attachment { width: 150px; background: var(--panel); border-radius: 12px; padding: 10px; overflow: hidden; }
.attachment img, .attachment video { width: 100%; height: 104px; object-fit: contain; background: #000; border-radius: 6px; }
.attachment p, .attachment button, .attachment a { font-size: 12px; overflow-wrap: anywhere; }
.error { color: #ff9990; line-height: 1.6; }
.toc { margin-top: 36px; max-width: 760px; }
.toc summary { padding: 22px 0; font-size: 21px; cursor: pointer; border-bottom: 1px solid var(--line); }
.toc a { display: block; padding: 22px 0 22px 28px; border-bottom: 1px solid var(--line); font-size: 17px; }
.article { max-width: 760px; margin: auto; }
.article-toolbar { position: sticky; top: 0; z-index: 2; display: flex; flex-wrap: wrap; gap: 12px; padding: 16px 0; background: #000e; backdrop-filter: blur(16px); }
.article-toolbar .pill { font-size: 14px; }
.article h1 { margin: 32px 0 24px; font-size: 44px; }
.article p { font-size: 17px; line-height: 1.75; color: #d2d2d7; }
.article .hint { font-size: 13px; color: var(--muted); margin-bottom: 36px; }
.article section { border-top: 1px solid var(--line); padding: 40px 0; scroll-margin-top: 90px; }
.article h2 { display: flex; align-items: center; gap: 12px; font-size: 26px; }
.step-number { display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 50%; background: var(--panel); font-size: 16px; font-weight: 500; flex-shrink: 0; }
.phone { width: min(88%, 350px); margin: 32px auto 16px; padding: 8px; border: 2px solid #b4b4b7; background: #040405; border-radius: 48px; box-shadow: inset 0 0 0 2px #343438; }
.phone img { display: block; width: 100%; height: auto; border-radius: 37px; cursor: zoom-in; }
.article .caption { text-align: center; font-size: 13px; color: var(--muted); }
details.callout { border-bottom: 1px solid var(--line); margin-top: 12px; padding: 12px 0; }
details.callout summary { font-size: 14px; color: var(--blue); cursor: pointer; }
.timeline { display: grid; gap: 20px; margin: 32px 0; max-width: 760px; }
.message { padding: 24px; background: var(--panel); border-radius: 18px; }
.message.staff { background: #112337; border: 1px solid #2997ff40; }
.message p { white-space: pre-wrap; overflow-wrap: anywhere; line-height: 1.7; }
.message small { color: var(--muted); }
.ticket-row { display: block; padding: 24px 0; border-bottom: 1px solid var(--line); }
.ticket-row strong { display: block; color: var(--text); margin-bottom: 10px; }
.badge { padding: 4px 10px; background: #2997ff20; color: #70b8ff; border-radius: 15px; font-size: 12px; }
.empty { padding: 28px; border-radius: 18px; background: var(--panel); color: var(--muted); }
footer { display: flex; flex-wrap: wrap; gap: 24px; max-width: 980px; padding: 24px 0 32px; margin: auto; border-top: 1px solid #ffffff24; font-size: 12px; }
footer a { color: var(--muted); }
#notice { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: #f5f5f7; color: #1d1d1f; padding: 14px 22px; border-radius: 12px; z-index: 10; max-width: 90%; display: none; font-size: 15px; }
dialog { background: #161617; border: 1px solid var(--line); border-radius: 18px; max-width: 94vw; max-height: 94vh; padding: 16px; }
dialog::backdrop { background: #000d; }
dialog img { max-width: 85vw; max-height: 82vh; object-fit: contain; }
dialog button { display: block; margin-left: auto; border: 0; border-radius: 50%; background: #333336; color: #fff; width: 36px; height: 36px; font-size: 24px; }
.inline-link { background: none; border: 0; color: var(--blue); padding: 8px 0; }
.divider { margin: 36px 0; border: 0; border-top: 1px solid var(--line); }
.upload-picker { position: relative; display: inline-flex; padding: 10px 18px; border: 1px solid #6e6e73; border-radius: 24px; color: var(--blue); cursor: pointer; overflow: hidden; font-size: 15px; margin: 4px 0; }
.upload-picker input { position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; }
.upload-picker:focus-within { outline: 3px solid var(--blue); outline-offset: 4px; }
/* Shared glass capsules for back navigation and secondary controls. */
.back, .pill:not(.primary), nav button, .upload-picker {
  min-height: 44px;
  padding: 10px 17px;
  border: 1px solid #ffffff29;
  border-radius: 999px;
  background: linear-gradient(155deg, #ffffff20, #ffffff08), #252527b3;
  color: var(--text);
  box-shadow: inset 0 1px 0 #ffffff21, inset 0 -1px 0 #ffffff08, 0 3px 12px #0003;
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  backdrop-filter: blur(20px) saturate(150%);
  transition: background .18s, border-color .18s, box-shadow .18s;
}
.back:hover, .pill:not(.primary):hover, nav button:hover, .upload-picker:hover {
  background: linear-gradient(155deg, #ffffff2b, #ffffff10), #303033cc;
  border-color: #ffffff45;
  text-decoration: none;
}
.back:active, .pill:not(.primary):active, nav button:active, .upload-picker:active {
  background: #ffffff16;
  box-shadow: inset 0 1px 3px #0005;
}
nav button { padding: 8px 12px; }
@media (max-width: 1044px) { footer { margin: 0 32px; } }
@media (max-width: 620px) {
  .header-inner { padding: 12px 20px; gap: 12px; min-height: 56px; }
  .brand img { width: 92px; }
  nav { gap: 14px; font-size: 12px; }

  main { padding: 28px 22px 64px; }
  .home-page { padding-top: 32px; }
  .help-hero { padding: 10px 0 38px; }
  .help-hero h1 { margin: 20px 0 30px; }
  .search input { font-size: 17px; min-height: 56px; padding-top: 15px; padding-bottom: 15px; }
  .search::before { top: 19px; }
  .search::after { top: 34px; }
  .quick-guide { font-size: 15px; }
  h1 { font-size: 32px; margin: 20px 0; }
  h2 { font-size: 24px; }
  .intro { font-size: 17px; margin-bottom: 28px; }
  .grid { grid-template-columns: 1fr; gap: 14px; }
  .card { padding: 24px; gap: 16px; }
  .card strong { font-size: 19px; }
  .hero-card { min-height: 220px; padding: 30px 20px; gap: 20px; }
  .hero-card strong { font-size: 24px; }
  .hero-card .icon { width: 40px; height: 40px; }
  .hero-card p { font-size: 15px; }
  .card-link { font-size: 15px; }
  .banner { padding: 22px; margin: 28px 0 36px; }
  .banner strong { font-size: 17px; }
  .article h1 { font-size: 32px; margin-top: 24px; }
  .article h2 { font-size: 23px; }
  .article-toolbar { gap: 10px; }
  .article-toolbar .pill { font-size: 14px; }
  .phone { border-radius: 44px; padding: 7px; }
  .phone img { border-radius: 34px; }
  footer { margin: 0 22px; gap: 18px; }
}
@media (max-width: 360px) {
  .header-inner { padding: 12px; gap: 8px; }
  .brand img { width: 76px; }
  nav { font-size: 11px; gap: 10px; }

  main { padding-left: 16px; padding-right: 16px; }
  .help-hero h1 { font-size: 29px; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }

.service-notice { padding: 18px 20px; border: 1px solid #ffffff29; border-radius: 16px; background: var(--panel); color: var(--muted); line-height: 1.6; }