:root{
  --bg:#0b1220;
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.70);
  --line: rgba(255,255,255,.12);
  --panel: rgba(255,255,255,.06);
  --shadow: 0 18px 60px rgba(0,0,0,.35);
  --primary: #6ee7ff;
  --primary2:#a78bfa;
  --ok:#7cf29a;
  --warn:#ffd166;
  --danger:#ff6b6b;
}

*{ box-sizing:border-box; }
body{
  margin:0;
  color:var(--text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  background:
    radial-gradient(1200px 700px at 20% 10%, #1a2a6c55, transparent),
    radial-gradient(900px 500px at 90% 20%, #00c6ff33, transparent),
    radial-gradient(900px 500px at 60% 90%, #f7971e22, transparent),
    var(--bg);
  min-height:100vh;
}

/* 顶部导航（类似你图的布局） */
.topnav{
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(255,255,255,.10);
  background: rgba(15, 45, 120, 0.55);
  backdrop-filter: blur(10px);
}
.topnav__inner{
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 16px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 16px;
}
.brand{ display:flex; align-items:center; gap:10px; }
.brand__logo{
  width: 34px; height: 34px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  color:#07101c;
  display:flex; align-items:center; justify-content:center;
  font-weight:900;
  box-shadow: 0 0 0 6px rgba(110,231,255,.12);
}
.brand__name{ font-weight: 900; letter-spacing:.2px; }

.menu{
  display:flex;
  gap: 10px;
  align-items:center;
  flex-wrap:wrap;
}
.menu__item{
  border: 1px solid transparent;
  background: transparent;
  color: rgba(255,255,255,.86);
  padding: 10px 12px;
  border-radius: 12px;
  cursor:pointer;
  font-size: 13px;
}
.menu__item:hover{ background: rgba(255,255,255,.08); }
.menu__item.is-active{
  background: rgba(110,231,255,.14);
  border-color: rgba(110,231,255,.18);
}

.linkbtn{
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.06);
  color: rgba(255,255,255,.88);
  padding: 10px 12px;
  border-radius: 999px;
  cursor:pointer;
  font-size: 13px;
}
.linkbtn:hover{ background: rgba(255,255,255,.10); }

/* Hero */
.hero{
  background: linear-gradient(135deg, rgba(59,130,246,.55), rgba(99,102,241,.45));
  border-bottom: 1px solid rgba(255,255,255,.10);
}
.hero__inner{
  max-width: 1200px;
  margin: 0 auto;
  padding: 56px 16px 42px 16px;
  display:grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 26px;
  align-items:center;
}
@media (max-width: 980px){
  .hero__inner{ grid-template-columns: 1fr; }
}
.hero__kicker{
  letter-spacing: .12em;
  text-transform: uppercase;
  font-size: 12px;
  color: rgba(255,255,255,.85);
}
.hero__title{
  margin: 10px 0 0 0;
  font-size: 34px;
  line-height: 1.18;
  font-weight: 900;
}
.hero__desc{
  margin: 12px 0 0 0;
  max-width: 58ch;
  color: rgba(255,255,255,.88);
  line-height: 1.8;
  font-size: 14px;
}
.hero__actions{ margin-top: 18px; display:flex; gap:12px; flex-wrap:wrap; }
.hero__tips{ margin-top: 18px; display:grid; grid-template-columns: 1fr 1fr; gap: 10px; }
@media (max-width: 520px){ .hero__tips{ grid-template-columns: 1fr; } }

.tipcard{
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(0,0,0,.16);
  border-radius: 16px;
  padding: 12px;
}
.tipcard__t{ font-weight: 900; font-size: 12px; }
.tipcard__p{ margin-top: 6px; color: rgba(255,255,255,.80); font-size: 12px; line-height: 1.6; }

/* 右侧插画（纯 CSS 装饰） */
.illus{
  position: relative;
  height: 320px;
  border-radius: 26px;
  border: 1px solid rgba(255,255,255,.16);
  background: rgba(0,0,0,.16);
  overflow:hidden;
}
.illus__ring{
  position:absolute;
  width: 220px; height: 220px;
  border-radius: 999px;
  left: 50%; top: 50%;
  transform: translate(-40%, -52%);
  background: radial-gradient(circle at 30% 30%, rgba(110,231,255,.9), rgba(167,139,250,.2) 55%, transparent 70%);
  filter: blur(.2px);
}
.illus__panel{
  position:absolute;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  backdrop-filter: blur(6px);
}
.illus__panel--a{ width: 160px; height: 80px; left: 22px; top: 46px; }
.illus__panel--b{ width: 190px; height: 96px; left: 56px; bottom: 38px; }
.illus__panel--c{ width: 120px; height: 64px; right: 22px; top: 140px; }
.illus__dot{
  position:absolute; width:10px; height:10px; border-radius:999px;
  background: rgba(255,255,255,.85);
  box-shadow: 0 0 0 6px rgba(255,255,255,.12);
}
.illus__dot--1{ left: 28px; top: 20px; }
.illus__dot--2{ right: 30px; top: 34px; }
.illus__dot--3{ right: 80px; bottom: 26px; }

.btn{
  border: 1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.08);
  color: rgba(255,255,255,.92);
  padding: 11px 14px;
  border-radius: 14px;
  cursor:pointer;
  font-size: 13px;
}
.btn:hover{ background: rgba(255,255,255,.12); }
.btn--primary{
  border-color: rgba(110,231,255,.22);
  background: rgba(110,231,255,.14);
}
.btn--ghost{ background: transparent; }

/* Stats */
.stats{ background: rgba(255,255,255,.03); }
.stats__inner{ max-width: 1200px; margin: 0 auto; padding: 40px 16px 36px; }
.stats__head{ text-align:center; position:relative; }
.stats__watermark{
  position:absolute; left: 50%; top: -6px; transform: translateX(-50%);
  font-size: 60px; font-weight: 900; letter-spacing:.12em;
  color: rgba(255,255,255,.05);
  user-select:none;
  pointer-events:none;
}
.stats__title{ margin: 0; font-size: 20px; font-weight: 900; }
.stats__line{ width: 46px; height: 3px; border-radius: 999px; background: rgba(110,231,255,.9); margin: 14px auto 0; }

.statgrid{
  margin-top: 22px;
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
@media (max-width: 980px){
  .statgrid{ grid-template-columns: 1fr; }
}
.statcard{
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.18);
  border-radius: 18px;
  padding: 16px;
  box-shadow: var(--shadow);
}
.statcard__k{ color: rgba(255,255,255,.78); font-size: 13px; }
.statcard__v{ margin-top: 10px; font-size: 40px; font-weight: 900; letter-spacing:.5px; }
.unit{ font-size: 14px; font-weight: 800; margin-left: 6px; color: rgba(255,255,255,.8); }
.statcard__s{ margin-top: 8px; color: rgba(255,255,255,.62); font-size: 12px; line-height: 1.6; }

/* Workbench panels */
.workbench__inner{ max-width: 1200px; margin: 0 auto; padding: 26px 16px 40px; }
.panel{
  display:none;
  border: 1px solid rgba(110,231,255,.16);
  background: linear-gradient(180deg, rgba(110,231,255,.06), rgba(167,139,250,.035));
  border-radius: 18px;
  box-shadow: var(--shadow);
  overflow:hidden;
}
.panel.is-show{ display:block; }
.panel__head{
  padding: 16px;
  border-bottom: 1px solid rgba(255,255,255,.10);
  background: rgba(110,231,255,.04);
}
.panel__head h2{ margin:0 0 6px 0; font-size: 16px; }
.panel__head p{ margin:0; color: var(--muted); font-size: 13px; line-height: 1.7; }


.cards{
  padding: 14px;
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
@media (max-width: 980px){ .cards{ grid-template-columns: 1fr; } }

.card{
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.18);
  border-radius: 16px;
  padding: 14px;
}
.card__title{ font-weight: 900; margin-bottom: 6px; }
.card__desc{ color: var(--muted); font-size: 13px; line-height: 1.7; margin-bottom: 10px; }

.story{ margin: 0 14px 14px; }
.story__head{ display:flex; gap:10px; align-items:flex-start; justify-content:space-between; }
.story__title{ font-weight: 900; }
.story__meta{ margin-top: 4px; color: var(--muted); font-size: 12px; }
.story__body{
  margin: 12px 0 0 0;
  padding: 12px;
  background: rgba(0,0,0,.28);
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 14px;
  white-space: pre-wrap;
  line-height: 1.7;
  font-size: 13px;
  color: rgba(255,255,255,.88);
}

.grid{
  padding: 14px;
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
@media (max-width: 980px){ .grid{ grid-template-columns: 1fr; } }

.form{ display:flex; flex-direction:column; gap: 10px; }
.label{ font-size: 12px; color: var(--muted); }
.input, .textarea, select{
  width:100%;
  padding: 11px 12px;
  border-radius: 14px;
  border: 1px solid rgba(110,231,255,.24);
  background: linear-gradient(180deg, rgba(110,231,255,.08), rgba(0,0,0,.22));
  color: rgba(255,255,255,.92);
  outline:none;
}
.input::placeholder, .textarea::placeholder{ color: rgba(255,255,255,.55); }
.textarea{ min-height: 120px; resize: vertical; }
.input:focus, .textarea:focus, select:focus{
  border-color: rgba(110,231,255,.78);
  box-shadow: 0 0 0 4px rgba(110,231,255,.18);
}
.row{ display:flex; gap:10px; flex-wrap:wrap; }

.risk{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width: 88px;
  padding: 8px 10px;
  border-radius: 999px;
  font-weight: 900;
  margin: 10px 0;
  border: 1px solid rgba(255,255,255,.14);
}
.risk--low{ background: rgba(124,242,154,.10); border-color: rgba(124,242,154,.18); color: var(--ok); }
.risk--mid{ background: rgba(255,209,102,.12); border-color: rgba(255,209,102,.22); color: var(--warn); }
.risk--high{ background: rgba(255,107,107,.12); border-color: rgba(255,107,107,.22); color: var(--danger); }

.list{ margin:0; padding-left: 18px; color: rgba(255,255,255,.86); line-height: 1.8; font-size: 13px; }
.advice{
  margin-top: 8px;
  padding: 12px;
  border-radius: 14px;
  border: 1px dashed rgba(255,255,255,.18);
  background: rgba(255,255,255,.03);
  color: rgba(255,255,255,.88);
  line-height: 1.8;
  font-size: 13px;
}

.log{
  margin-top: 10px;
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.25);
  font-size: 12px;
  color: rgba(255,255,255,.84);
  white-space: pre-wrap;
}
.is-hidden{ display:none; }

.kb{ margin-top: 12px; display:flex; flex-direction:column; gap: 10px; }
.kb__item{
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.20);
}
.kb__q{ font-weight: 900; margin-bottom: 6px; }
.kb__a{ color: rgba(255,255,255,.84); line-height: 1.8; font-size: 13px; }

.footer{
  max-width: 1200px;
  margin: 10px auto 80px;
  padding: 0 16px;
  color: rgba(255,255,255,.55);
  font-size: 12px;
}

/* 右下角 AI 浮动按钮 */
.ai-fab{
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 50;
  display:flex;
  align-items:center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: 999px;
  border: 1px solid rgba(110,231,255,.28);
  background: rgba(35, 90, 255, 0.35);
  backdrop-filter: blur(10px);
  box-shadow: 0 18px 60px rgba(0,0,0,.35);
  color: rgba(255,255,255,.92);
  cursor:pointer;
}
.ai-fab:hover{ background: rgba(35, 90, 255, 0.48); }
.ai-fab__icon{
  width: 34px; height: 34px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  color:#07101c;
  display:flex; align-items:center; justify-content:center;
  font-weight: 900;
}
.ai-fab__text{ font-weight: 900; font-size: 13px; }

/* 右侧 AI 抽屉 */
.ai-drawer{
  position: fixed;
  top: 0;
  right: 0;
  height: 100vh;
  width: min(420px, 92vw);
  z-index: 60;
  transform: translateX(105%);
  transition: transform .22s ease;
  border-left: 1px solid rgba(255,255,255,.12);
  background: rgba(10, 16, 35, 0.88);
  backdrop-filter: blur(14px);
  display:flex;
  flex-direction:column;
}
.ai-drawer.is-open{ transform: translateX(0); }

.ai-drawer__head{
  padding: 14px;
  border-bottom: 1px solid rgba(255,255,255,.10);
  display:flex;
  gap: 10px;
  justify-content:space-between;
  align-items:flex-start;
}
.ai-drawer__title{ font-weight: 900; }
.ai-drawer__sub{ margin-top: 4px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.ai-drawer__actions{ display:flex; gap: 8px; flex-wrap:wrap; justify-content:flex-end; }

.ai-drawer__body{
  padding: 14px;
  overflow:auto;
  flex: 1;
}
.ai-note{
  padding: 12px;
  border-radius: 14px;
  border: 1px solid rgba(110,231,255,.18);
  background: rgba(110,231,255,.06);
  color: rgba(255,255,255,.86);
  font-size: 12px;
  line-height: 1.7;
}
.mono{ font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }

.ai-embed{ margin-top: 12px; }
.ai-embed__title{ font-weight: 900; font-size: 13px; margin-bottom: 8px; }
.ai-embed__placeholder{
  border: 1px dashed rgba(255,255,255,.18);
  background: rgba(255,255,255,.03);
  border-radius: 14px;
  padding: 12px;
  color: rgba(255,255,255,.78);
  font-size: 12px;
  line-height: 1.7;
}
.ai-iframe{
  width: 100%;
  height: calc(100vh - 220px);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 14px;
  background: rgba(255,255,255,.03);
}

/* 背景遮罩 */
.backdrop{
  position: fixed;
  inset: 0;
  z-index: 55;
  background: rgba(0,0,0,.45);
  opacity: 0;
  pointer-events: none;
  transition: opacity .22s ease;
}
.backdrop.is-show{
  opacity: 1;
  pointer-events: auto;
}
/* -------- Media Upload & Fraud Detection -------- */
.media-upload-section {
  margin-top: 12px;
  border: 1px solid rgba(110,231,255,.18);
  border-radius: 14px;
  padding: 12px;
  background: rgba(110,231,255,.04);
}

.media-upload__title {
  font-weight: 900;
  font-size: 13px;
  margin-bottom: 10px;
}

.media-upload__area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  border: 2px dashed rgba(110,231,255,.30);
  border-radius: 12px;
  padding: 20px 12px;
  text-align: center;
  cursor: pointer;
  transition: border-color .2s, background .2s;
}

.media-upload__area:hover,
.media-upload__area.is-dragover {
  border-color: rgba(110,231,255,.70);
  background: rgba(110,231,255,.08);
}

.media-upload__icon {
  font-size: 26px;
}

.media-upload__text {
  font-size: 13px;
  color: rgba(255,255,255,.88);
}

.media-upload__hint {
  font-size: 11px;
  color: rgba(255,255,255,.50);
}

/* visually hidden but still functional */
.media-upload__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

/* Results section */
.media-result-section {
  margin-top: 12px;
}

.media-preview-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 12px;
}

.media-preview-item {
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 12px;
  overflow: hidden;
  background: rgba(0,0,0,.22);
}

.media-preview__img {
  width: 100%;
  max-height: 200px;
  object-fit: contain;
  display: block;
  background: rgba(0,0,0,.28);
}

.media-preview__video {
  width: 100%;
  max-height: 200px;
  display: block;
  background: rgba(0,0,0,.28);
}

.media-preview__info {
  display: flex;
  justify-content: space-between;
  padding: 5px 10px;
  font-size: 11px;
  color: rgba(255,255,255,.60);
  gap: 8px;
}

.media-preview__info span:first-child {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.media-result {
  padding: 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(0,0,0,.18);
}

.media-result__risk {
  margin-bottom: 8px;
}

/* -------- Chat Interface -------- */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,.15) transparent;
}

.chat-msg {
  display: flex;
  gap: 8px;
  max-width: 88%;
}
.chat-msg--ai  { align-self: flex-start; }
.chat-msg--user { align-self: flex-end; flex-direction: row-reverse; }

.chat-msg__avatar {
  width: 28px; height: 28px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--primary2));
  color: #07101c;
  display: flex; align-items: center; justify-content: center;
  font-weight: 900; font-size: 10px;
  flex-shrink: 0; align-self: flex-end;
}
.chat-msg--user .chat-msg__avatar {
  background: rgba(255,255,255,.18);
  color: rgba(255,255,255,.92);
}

.chat-msg__bubble {
  padding: 10px 13px;
  border-radius: 18px;
  font-size: 13px; line-height: 1.7;
  word-break: break-word;
}
.chat-msg--ai  .chat-msg__bubble {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  border-bottom-left-radius: 4px;
}
.chat-msg--user .chat-msg__bubble {
  background: rgba(110,231,255,.18);
  border: 1px solid rgba(110,231,255,.26);
  border-bottom-right-radius: 4px;
  color: rgba(255,255,255,.95);
}

.chat-hint { color: rgba(255,255,255,.58); font-size: 12px; }
.chat-section-title { font-weight: 900; font-size: 12px; color: rgba(255,255,255,.68); margin: 6px 0 4px; }
.chat-advice-text { color: rgba(255,255,255,.84); font-size: 12px; line-height: 1.7; }

/* Thinking animation */
.chat-thinking-dots { display: inline-flex; gap: 3px; align-items: center; }
.chat-thinking-dots span {
  font-size: 20px; line-height: 1;
  animation: chatDotBounce 1.2s ease-in-out infinite;
  color: rgba(255,255,255,.55);
}
.chat-thinking-dots span:nth-child(2) { animation-delay: .2s; }
.chat-thinking-dots span:nth-child(3) { animation-delay: .4s; }
@keyframes chatDotBounce {
  0%, 80%, 100% { transform: translateY(0); opacity: .5; }
  40%            { transform: translateY(-5px); opacity: 1; }
}

/* Pending attachment chips */
.chat-attachments-preview {
  padding: 8px 14px 0;
  display: flex; flex-wrap: wrap; gap: 8px;
}
.chat-attach-chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 10px 4px 8px;
  border-radius: 999px;
  border: 1px solid rgba(110,231,255,.28);
  background: rgba(110,231,255,.08);
  font-size: 12px; max-width: 180px;
}
.chat-attach-chip > span {
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.chat-attach-chip__remove {
  flex-shrink: 0; background: none; border: none;
  color: rgba(255,255,255,.55); cursor: pointer;
  padding: 0; font-size: 12px; line-height: 1; margin-left: 2px;
}
.chat-attach-chip__remove:hover { color: rgba(255,255,255,.92); }

/* Input bar */
.chat-input-bar {
  display: flex; align-items: flex-end; gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid rgba(255,255,255,.10);
  flex-shrink: 0;
}
.chat-attach-btn {
  flex-shrink: 0; width: 36px; height: 36px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.16);
  background: transparent; color: rgba(255,255,255,.65);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  font-size: 18px; transition: background .15s, color .15s;
}
.chat-attach-btn:hover { background: rgba(255,255,255,.08); color: rgba(255,255,255,.92); }

.chat-textarea {
  flex: 1;
  padding: 8px 12px;
  border-radius: 14px;
  border: 1px solid rgba(110,231,255,.22);
  background: rgba(110,231,255,.06);
  color: rgba(255,255,255,.92);
  outline: none; resize: none;
  font-size: 13px; line-height: 1.6;
  min-height: 36px; max-height: 140px;
  overflow-y: auto; font-family: inherit;
}
.chat-textarea::placeholder { color: rgba(255,255,255,.42); }
.chat-textarea:focus {
  border-color: rgba(110,231,255,.65);
  box-shadow: 0 0 0 3px rgba(110,231,255,.12);
}

.chat-send-btn {
  flex-shrink: 0; width: 36px; height: 36px;
  border-radius: 999px;
  border: 1px solid rgba(110,231,255,.26);
  background: rgba(110,231,255,.16);
  color: rgba(255,255,255,.92);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 900;
  transition: background .15s;
}
.chat-send-btn:hover { background: rgba(110,231,255,.30); }

/* Media thumbnails inside chat bubbles */
.chat-media-thumb { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.chat-media-thumb__img {
  width: 80px; height: 60px; object-fit: cover;
  border-radius: 8px; border: 1px solid rgba(255,255,255,.14); display: block;
}
.chat-media-thumb__video {
  max-width: 160px; max-height: 100px;
  border-radius: 8px; border: 1px solid rgba(255,255,255,.14); display: block;
}
.chat-media-thumb__file {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 4px 8px; border-radius: 8px;
  border: 1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.06);
  font-size: 12px; color: rgba(255,255,255,.80);
}