.support-rail { position: fixed; z-index: 60; right: 18px; top: 50%; transform: translateY(-25%);
  display: grid; gap: 1px; border: 1px solid #e0e8f5; border-radius: 12px; background: #eaf0fa;
  box-shadow: 0 12px 35px #132c5920; overflow: hidden; }
.support-rail button { border: 0; background: #fff; color: #526888; width: 80px; min-height: 82px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 5px; font: 12px/1.5 "Microsoft YaHei", sans-serif; cursor: pointer; }
.support-rail button:hover { color: #4385ff; background: #f2f7ff; }
.support-rail svg { width: 25px; height: 25px; fill: none; stroke: currentColor; stroke-width: 1.5;
  stroke-linecap: round; stroke-linejoin: round; }
.support-rail [hidden], .support-toast[hidden] { display: none; }
.support-dialog { box-sizing: border-box; padding: 34px; width: min(560px, calc(100% - 32px));
  max-height: calc(100dvh - 40px); overflow: auto; border: 1px solid #dce6f4; border-radius: 18px;
  background: #fff; color: #26354c; box-shadow: 0 24px 90px #071a4540;
  font: 14px/1.7 "Microsoft YaHei", sans-serif; }
.support-dialog::backdrop { background: #0b1e4766; backdrop-filter: blur(5px); }
.support-dialog h2 { margin: 0 24px 10px 0; font-size: 24px; }
.support-dialog p { color: #6a7990; margin: 8px 0 20px; }
.support-close { position: absolute; top: 12px; right: 16px; padding: 4px 9px;
  border: 0; background: transparent; font: 28px/1 sans-serif; color: #728099; cursor: pointer; }
.support-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.support-form-grid label { display: grid; gap: 7px; font-size: 13px; }
.support-dialog input, .support-dialog textarea { box-sizing: border-box; width: 100%; min-width: 0;
  background: #f8faff; border: 1px solid #dce5f3; border-radius: 6px; padding: 10px 12px;
  color: #26354c; font: inherit; }
.support-dialog textarea { resize: vertical; }
.support-wide { grid-column: 1 / -1; }
.support-submit { width: 100%; padding: 13px; border: 0; border-radius: 6px;
  background: #4385ff; color: #fff; font: inherit; cursor: pointer; }
.support-submit:disabled { opacity: .55; cursor: wait; }
.support-qr-dialog { width: min(380px, calc(100% - 32px)); text-align: center; }
.support-qr { display: block; width: 240px; max-width: 100%; height: auto; margin: 24px auto; }
.support-toast { position: fixed; left: 50%; bottom: 40px; transform: translateX(-50%); z-index: 100;
  max-width: calc(100% - 40px); padding: 12px 24px; background: #20334f; color: #fff;
  border-radius: 8px; font: 14px/1.7 "Microsoft YaHei", sans-serif; box-shadow: 0 8px 30px #0002; }
.support-header-phone { border: 0; background: transparent; color: inherit; font: 600 15px/1.5 sans-serif;
  white-space: nowrap; cursor: pointer; padding: 6px 0; }
.support-header-phone:hover { color: #4385ff; }
.support-ai-icon { display: grid; place-items: center; width: 27px; height: 27px; border-radius: 7px;
  background: #e6f4ec; color: #087a50; font: 700 12px/1 "Microsoft YaHei", sans-serif; }
.fastgpt-dialog { width: min(440px, calc(100% - 24px)); height: min(680px, calc(100dvh - 32px));
  max-height: calc(100dvh - 32px); padding: 0; overflow: hidden; border-radius: 8px;
  display: none; flex-direction: column; }
.fastgpt-dialog[open] { display: flex; }
.fastgpt-header { display: flex; align-items: center; justify-content: space-between; flex: none;
  padding: 19px 22px 14px; border-bottom: 1px solid #e5eaf0; }
.fastgpt-header h2 { margin: 0; font-size: 19px; }
.fastgpt-header p { margin: 2px 0 0; font-size: 12px; }
.fastgpt-new { margin-right: 22px; width: 32px; height: 32px; border: 1px solid #dbe5ef;
  border-radius: 6px; background: #fff; color: #26354c; font: 24px/1 sans-serif; cursor: pointer; }
.fastgpt-new:hover { background: #f2f7f5; color: #087a50; }
.fastgpt-messages { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 12px;
  padding: 20px 18px; background: #f6f8fa; }
.fastgpt-message { max-width: 88%; padding: 10px 13px; border-radius: 8px; white-space: pre-wrap;
  overflow-wrap: anywhere; font: 14px/1.65 "Microsoft YaHei", sans-serif; }
.fastgpt-message-user { align-self: flex-end; background: #087a50; color: #fff; }
.fastgpt-message-assistant { align-self: flex-start; background: #fff; color: #26354c;
  border: 1px solid #e3e9ee; }
.fastgpt-markdown { white-space: normal; min-width: 0; flex-shrink: 0; }
.fastgpt-markdown > :first-child { margin-top: 0; }
.fastgpt-markdown > :last-child { margin-bottom: 0; }
.fastgpt-markdown p { margin: 0 0 10px; line-height: inherit; }
.fastgpt-markdown h1, .fastgpt-markdown h2 { font-size: 1.2em; margin: 16px 0 8px; }
.fastgpt-markdown h3, .fastgpt-markdown h4, .fastgpt-markdown h5,
.fastgpt-markdown h6 { font-size: 1.05em; margin: 14px 0 6px; }
.fastgpt-markdown ul, .fastgpt-markdown ol { margin: 8px 0; padding-left: 24px; }
.fastgpt-markdown ul { list-style: disc; }
.fastgpt-markdown ol { list-style: decimal; }
.fastgpt-markdown li { margin: 4px 0; }
.fastgpt-markdown li > p { margin-bottom: 4px; }
.fastgpt-markdown blockquote { margin: 10px 0; padding: 4px 12px; border-left: 3px solid var(--support-accent); }
.fastgpt-markdown code { font: .9em/1.6 Consolas, monospace; background: #7c8ba51c;
  border-radius: 4px; padding: 2px 4px; }
.fastgpt-markdown pre { max-width: 100%; overflow-x: auto; white-space: pre; padding: 12px;
  border-radius: 8px; background: #7c8ba514; }
.fastgpt-markdown pre code { background: none; padding: 0; }
.fastgpt-markdown a[href] { color: var(--support-accent, #2865bf); text-decoration: underline;
  overflow-wrap: anywhere; }
.fastgpt-markdown img { max-width: 100%; height: auto; border-radius: 6px; }
.fastgpt-markdown input[type="checkbox"] { width: auto; margin: 0 6px 0 0; }
.fastgpt-markdown hr { border: 0; border-top: 1px solid #8793a440; margin: 14px 0; }
.fastgpt-table-scroll { max-width: 100%; overflow-x: auto; margin: 12px 0; }
.fastgpt-markdown table { border-collapse: collapse; min-width: 100%; font-size: 13px; }
.fastgpt-markdown th, .fastgpt-markdown td { border: 1px solid #8793a440; padding: 7px 10px; }
.fastgpt-markdown th { background: #7c8ba514; text-align: left; }
#fastgpt-form { flex: none; padding: 12px 15px 8px; border-top: 1px solid #e5eaf0; background: #fff; }
.fastgpt-input-label { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.fastgpt-compose { display: flex; align-items: flex-end; gap: 8px; }
.fastgpt-compose textarea { min-height: 48px; max-height: 130px; resize: vertical; background: #f8fafb; }
.fastgpt-compose button { flex: none; width: 44px; height: 44px; border: 0; border-radius: 6px;
  background: #087a50; color: #fff; font: 22px/1 sans-serif; cursor: pointer; }
.fastgpt-compose button:disabled { opacity: .55; cursor: wait; }
.fastgpt-status { min-height: 20px; margin: 4px 0 0 !important; font-size: 12px; }
@media (max-width: 1350px) { .support-rail { right: 8px; }
  .support-rail button { width: 64px; min-height: 70px; font-size: 11px; } }
@media (max-width: 780px) {
  .support-rail { top: auto; bottom: 20px; transform: none; right: 8px; border-radius: 8px; }
  .support-rail button { width: 54px; min-height: 60px; gap: 4px; padding: 8px 3px; font-size: 10px; }
  .support-rail svg { width: 21px; height: 21px; }
  .support-header-phone { font-size: 12px; }
  .support-form-grid { grid-template-columns: 1fr; }
  .support-dialog { padding: 28px 22px; }
  .support-toast { bottom: 30px; }
  .fastgpt-dialog { height: min(640px, calc(100dvh - 20px)); padding: 0; }
}

/* Cloud skin floating assistant: inherits each skin's accent variables. */
.support-rail { --support-accent: var(--cyan, var(--accent, #4385ff)); --support-panel: var(--surface, #fff);
  --support-ink: var(--text, #26354c); top: auto; right: clamp(14px, 2.4vw, 32px); bottom: clamp(18px, 4vh, 42px);
  top: auto !important; left: auto !important; transform: none !important; display: flex; flex-wrap: wrap;
  align-items: center; justify-content: flex-end; max-width: calc(100vw - 28px); gap: 7px; padding: 7px; border: 1px solid color-mix(in srgb, var(--support-accent) 22%, transparent);
  border-radius: 999px; background: color-mix(in srgb, var(--support-panel) 82%, transparent); backdrop-filter: blur(18px) saturate(1.3);
  box-shadow: 0 18px 50px color-mix(in srgb, var(--support-accent) 20%, transparent), 0 2px 10px #0002; overflow: visible; }
.support-rail button { width: auto; height: auto; min-width: 42px; min-height: 42px;
  flex: 0 0 auto; padding: 8px 10px; border-radius: 999px; background: transparent; color: color-mix(in srgb, var(--support-ink) 72%, var(--support-accent)); gap: 2px; }
.support-rail button:hover { color: var(--support-accent); background: color-mix(in srgb, var(--support-accent) 11%, transparent); transform: translateY(-2px); }
.support-rail > button:first-child { width: auto; min-width: 0; padding: 8px 15px 8px 10px; flex-direction: row; gap: 8px; background: linear-gradient(135deg, color-mix(in srgb, var(--support-accent) 92%, #fff), color-mix(in srgb, var(--support-accent) 58%, #fff)); color: #fff; box-shadow: 0 8px 22px color-mix(in srgb, var(--support-accent) 32%, transparent); }
.support-rail > button:first-child:hover { color: #fff; filter: brightness(1.06); }
.support-rail > button:first-child span:last-child { font-weight: 700; letter-spacing: .02em; }
.support-rail svg { width: 20px; height: 20px; }
.support-ai-icon { width: 28px; height: 28px; border-radius: 50%; background: #ffffff2e; color: #fff; box-shadow: inset 0 0 0 1px #ffffff55; }
.support-rail button[data-support-top] { display: none; }
.support-phone-wrap { position: relative; display: flex; }
.support-rail .support-button-label { display: block; white-space: pre; text-align: center;
  max-width: min(240px, calc(100vw - 110px)); overflow: hidden; text-overflow: ellipsis; }
.support-rail svg, .support-ai-icon { flex-shrink: 0; }
.support-phone-menu { position: absolute; right: 0; bottom: 100%; display: grid; gap: 6px;
  min-width: 170px; max-width: calc(100vw - 32px); padding: 10px; border: 1px solid #dce6f4;
  border-radius: 14px; background: var(--support-panel, #fff); box-shadow: 0 16px 38px #132c5930; }
.support-phone-menu a, .support-phone-menu > span { padding: 8px 10px; border-radius: 8px;
  color: var(--support-ink, #26354c); text-decoration: none; white-space: nowrap; font: 14px/1.5 sans-serif; }
.support-phone-menu a:hover, .support-phone-menu a:focus-visible { color: var(--support-accent);
  background: color-mix(in srgb, var(--support-accent) 10%, transparent); }
.fastgpt-dialog { --support-accent: var(--cyan, #4385ff); background: var(--support-panel, #fff); color: var(--support-ink, #26354c); border-color: color-mix(in srgb, var(--support-accent) 24%, transparent); }
.fastgpt-header { background: linear-gradient(135deg, color-mix(in srgb, var(--support-accent) 16%, transparent), transparent); }
.fastgpt-message-user, .fastgpt-compose button { background: linear-gradient(135deg, var(--support-accent), color-mix(in srgb, var(--support-accent) 62%, #fff)); }
.fastgpt-messages { background: color-mix(in srgb, var(--support-panel, #fff) 88%, var(--support-accent)); }
.fastgpt-message-assistant { background: color-mix(in srgb, var(--support-panel, #fff) 92%, var(--support-accent)); color: var(--support-ink, #26354c); border-color: color-mix(in srgb, var(--support-accent) 18%, transparent); }
@media (max-width: 780px) { .support-rail { right: 12px; bottom: 14px; } .support-rail > button:not(:first-child) { display: none; } .support-rail > button:first-child { min-width: 0; width: 50px; padding: 8px; } .support-rail > button:first-child span:last-child { display: none; } }
.fastgpt-popover[hidden] { display: none; }
.fastgpt-popover { position: fixed; z-index: 70; right: clamp(14px, 2.4vw, 32px); bottom: var(--support-panel-bottom, 96px); width: min(430px, calc(100vw - 28px)); height: min(650px, calc(100dvh - 130px)); padding: 0; margin: 0; overflow: hidden; border: 1px solid color-mix(in srgb, var(--support-accent, #4385ff) 24%, transparent); border-radius: 24px; box-shadow: 0 24px 80px #071a4540; display: flex; flex-direction: column; animation: fastgpt-pop-in .22s ease-out; }
.fastgpt-popover .support-close { z-index: 2; }
.fastgpt-popover .fastgpt-header { padding-right: 62px; }
.fastgpt-popover.is-open { display: flex; }
@keyframes fastgpt-pop-in { from { opacity: 0; transform: translateY(12px) scale(.97); } to { opacity: 1; transform: translateY(0) scale(1); } }
@media (max-width: 780px) { .fastgpt-popover { right: 12px; left: 12px; bottom: var(--support-panel-bottom, 82px); width: auto; height: min(640px, calc(100dvh - 104px)); border-radius: 20px; } }

/* Refined conversation surface: more room for reading and composing. */
.fastgpt-popover { width: min(480px, calc(100vw - 28px)); height: min(720px, calc(100dvh - var(--support-panel-bottom, 96px) - 22px)); border-radius: 26px; background: var(--support-panel, #fff); }
.fastgpt-header { min-height: 74px; padding: 18px 62px 17px 24px; border-bottom: 1px solid color-mix(in srgb, var(--support-accent) 14%, transparent); }
.fastgpt-header h2 { font-size: 20px; letter-spacing: -.02em; }
.fastgpt-header p { margin: 5px 0 0; color: color-mix(in srgb, var(--support-ink) 58%, transparent); font-size: 12px; }
.fastgpt-new { margin-right: 0; width: 36px; height: 36px; border-radius: 11px; border-color: color-mix(in srgb, var(--support-accent) 20%, transparent); background: color-mix(in srgb, var(--support-accent) 8%, transparent); color: var(--support-accent); }
.fastgpt-messages { gap: 16px; padding: 24px 20px 28px; background: linear-gradient(180deg, color-mix(in srgb, var(--support-panel, #fff) 92%, var(--support-accent)), color-mix(in srgb, var(--support-panel, #fff) 98%, var(--support-accent))); }
.fastgpt-message { max-width: 84%; padding: 13px 16px; border-radius: 18px; font-size: 14px; line-height: 1.75; box-shadow: 0 4px 14px #14284b0b; }
.fastgpt-message-user { border-bottom-right-radius: 6px; box-shadow: 0 8px 18px color-mix(in srgb, var(--support-accent) 22%, transparent); }
.fastgpt-message-assistant { border-bottom-left-radius: 6px; }
#fastgpt-form { padding: 15px 16px 14px; border-top: 1px solid color-mix(in srgb, var(--support-accent) 15%, transparent); background: color-mix(in srgb, var(--support-panel, #fff) 96%, var(--support-accent)); }
.fastgpt-compose { align-items: stretch; gap: 10px; padding: 7px; border: 1px solid color-mix(in srgb, var(--support-accent) 24%, transparent); border-radius: 17px; background: var(--support-panel, #fff); box-shadow: 0 8px 24px #14284b10; }
.fastgpt-compose textarea { flex: 1 1 0; width: 0; min-width: 0; box-sizing: border-box;
  color: var(--support-ink, #26354c); font: 14px/1.65 "Microsoft YaHei", sans-serif; min-height: 74px; max-height: 180px; padding: 10px 11px; border: 0; outline: 0; resize: vertical; background: transparent; line-height: 1.65; }
.fastgpt-compose textarea:focus { box-shadow: none; }
.fastgpt-compose button { align-self: flex-end; width: 48px; height: 48px; margin: 0 0 1px; border-radius: 14px; font-size: 20px; box-shadow: 0 7px 16px color-mix(in srgb, var(--support-accent) 26%, transparent); }
.fastgpt-status { min-height: 18px; padding: 0 5px; color: color-mix(in srgb, var(--support-ink) 55%, transparent); }
@media (max-width: 780px) { .fastgpt-popover { height: min(680px, calc(100dvh - var(--support-panel-bottom, 82px) - 18px)); } .fastgpt-message { max-width: 90%; } .fastgpt-compose textarea { min-height: 82px; } }

@media (max-width: 780px) {
  .fastgpt-popover { width: auto; }
  .support-rail .support-phone-wrap > button { display: flex; }
  .support-rail .support-phone-wrap > button span { display: inline; }
}