:root {
  --ink: #111111;
  --ink-soft: #333333;
  --muted: #8c8c8c;
  --line: #e8e8e6;
  --bg: #ffffff;
  --bg-soft: #fafaf8;
  --serif: "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body { padding: 0 24px 96px; }

/* ------------------------------ 页头 ------------------------------ */

.site-head {
  max-width: 720px;
  margin: 0 auto;
  padding: 28px 0 0;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark { font-size: 13px; color: var(--muted); }

.brand-name {
  font-family: var(--serif);
  font-size: 16px;
  letter-spacing: 0.12em;
}

.brand-name em {
  font-style: normal;
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--muted);
  margin-left: 2px;
}

.head-note {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

main {
  max-width: 720px;
  margin: 0 auto;
}

/* ------------------------------ 首页 ------------------------------ */

.hero { padding: 72px 0 44px; }

.eyebrow {
  margin: 0 0 22px;
  font-size: 10.5px;
  letter-spacing: 0.34em;
  color: var(--muted);
}

.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: 42px;
  line-height: 1.34;
  font-weight: 400;
  letter-spacing: 0.02em;
}

.lede {
  margin: 26px 0 0;
  font-size: 14.5px;
  line-height: 2;
  color: var(--ink-soft);
}

/* 体系切换 */

.systems {
  display: flex;
  gap: 28px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 0;
  margin-bottom: 18px;
}

.sys-btn {
  appearance: none;
  background: none;
  border: 0;
  padding: 16px 0 14px;
  margin-bottom: -1px;
  font-family: var(--serif);
  font-size: 15px;
  color: var(--muted);
  letter-spacing: 0.06em;
  cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.sys-btn:hover { color: var(--ink-soft); }

.sys-btn[aria-selected="true"] {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.system-intro {
  margin: 0 0 40px;
  font-size: 13px;
  line-height: 1.9;
  color: var(--muted);
  min-height: 24px;
}

/* 表单 */

.form { display: block; }

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 28px;
}

.field { position: relative; display: block; margin-bottom: 28px; }
.field-row .field { margin-bottom: 0; }

label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 10px;
}

.opt { letter-spacing: 0; opacity: 0.7; }

input[type="text"],
input[type="date"],
input[type="time"],
select,
textarea {
  width: 100%;
  padding: 8px 0 10px;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  font-family: var(--sans);
  font-size: 15px;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s ease;
  -webkit-appearance: none;
}

input:focus, textarea:focus { border-bottom-color: var(--ink); }

textarea { resize: vertical; line-height: 1.8; }

input::placeholder, textarea::placeholder { color: #c4c4c0; }

.seg {
  display: flex;
  gap: 8px;
  padding-top: 2px;
}

.seg-btn {
  appearance: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 7px 22px;
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.18s ease;
}

.seg-btn[aria-pressed="true"] {
  border-color: var(--ink);
  color: var(--ink);
}

.check {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: -6px 0 30px;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--muted);
  cursor: pointer;
}

.check input {
  width: 13px;
  height: 13px;
  margin: 0;
  accent-color: #111;
}

.submit-row {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 36px;
}

.primary {
  appearance: none;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  padding: 13px 40px;
  font-family: var(--serif);
  font-size: 14px;
  letter-spacing: 0.16em;
  border-radius: 0;
  cursor: pointer;
  transition: opacity 0.18s ease;
}

.primary:disabled { opacity: 0.35; cursor: default; }
.primary:not(:disabled):hover { opacity: 0.82; }

.primary.ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}

.hint {
  margin: 0;
  font-size: 11.5px;
  color: var(--muted);
  line-height: 1.6;
}

.foot-note {
  margin: 64px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 11.5px;
  line-height: 1.9;
  color: #a8a8a4;
}

/* 地点联想 */

.suggest {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% - 22px);
  z-index: 20;
  background: #fff;
  border: 1px solid var(--line);
  max-height: 240px;
  overflow-y: auto;
}

.suggest-item {
  padding: 10px 12px;
  font-size: 13px;
  color: var(--ink-soft);
  cursor: pointer;
  border-bottom: 1px solid #f2f2f0;
}

.suggest-item:last-child { border-bottom: 0; }
.suggest-item:hover { background: var(--bg-soft); }

/* ------------------------------ 解读页 ------------------------------ */

.result-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 56px 0 28px;
  border-bottom: 1px solid var(--line);
}

.back {
  appearance: none;
  background: none;
  border: 0;
  padding: 0;
  font-size: 12.5px;
  color: var(--muted);
  cursor: pointer;
  letter-spacing: 0.04em;
}

.back:hover { color: var(--ink); }

.result-meta {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* 进度 */

.progress {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  padding: 22px 0 6px;
}

.pstep {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  color: #c0c0bc;
  letter-spacing: 0.04em;
}

.pstep .dot {
  width: 5px;
  height: 5px;
  border: 1px solid currentColor;
  border-radius: 50%;
}

.pstep.done { color: var(--ink-soft); }
.pstep.done .dot { background: var(--ink-soft); border-color: var(--ink-soft); }
.pstep.active { color: var(--ink); }
.pstep.active .dot { animation: pulse 1.4s ease-in-out infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.75); }
}

/* 报告正文 */

.report { padding: 10px 0 0; }

.section {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
  animation: rise 0.5s ease both;
}

.section:last-child { border-bottom: 0; }

@keyframes rise {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

.section-num {
  display: block;
  font-size: 10.5px;
  letter-spacing: 0.3em;
  color: #c0c0bc;
  margin-bottom: 14px;
}

.section h2 {
  margin: 0 0 20px;
  font-family: var(--serif);
  font-size: 25px;
  font-weight: 400;
  letter-spacing: 0.04em;
}

.section h3 {
  margin: 26px 0 10px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 400;
  color: var(--ink);
  letter-spacing: 0.03em;
}

.section p {
  margin: 0 0 15px;
  font-size: 15px;
  line-height: 2.05;
  color: var(--ink-soft);
  letter-spacing: 0.01em;
}

.section strong { font-weight: 600; color: var(--ink); }

.section ul { margin: 0 0 15px; padding-left: 18px; }
.section li { font-size: 15px; line-height: 2; color: var(--ink-soft); margin-bottom: 6px; }

.pending {
  padding: 34px 0;
  font-size: 13px;
  color: #b4b4b0;
  letter-spacing: 0.06em;
}

.pending .blink { animation: pulse 1.4s ease-in-out infinite; }

/* 追问对话 */

.chat {
  margin: 56px 0 0;
  padding-top: 40px;
  border-top: 1px solid var(--line);
}

.chat-h {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 500;
  margin: 0 0 6px;
}

.chat-sub {
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 24px;
  letter-spacing: 0.03em;
}

.chat-log { display: flex; flex-direction: column; gap: 18px; }

.msg {
  max-width: 92%;
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--ink);
  white-space: pre-wrap;
}

.msg.user {
  align-self: flex-end;
  background: #14140f;
  color: #faf9f6;
  padding: 10px 16px;
  max-width: 78%;
}

.msg.assistant {
  align-self: flex-start;
  border-left: 2px solid var(--line);
  padding-left: 18px;
  color: #2a2a27;
}

.msg.pending { color: var(--muted); font-size: 13px; }

.chat-form {
  display: flex;
  gap: 12px;
  margin-top: 28px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

.chat-form input {
  flex: 1;
  border: 0;
  background: none;
  padding: 10px 0;
  font-size: 14.5px;
  font-family: var(--sans);
  color: var(--ink);
  outline: none;
}

.chat-form input::placeholder { color: #b9b9b4; }

.chat-form button {
  border: 0;
  background: none;
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ink);
  cursor: pointer;
  padding: 0 4px;
}

.chat-form button:disabled { color: var(--muted); cursor: default; }

.chat-err {
  font-size: 12px;
  color: #a8443a;
  margin: 10px 0 0;
  min-height: 16px;
}

.result-foot { padding: 44px 0 0; }

/* 盘面数据 */

.facts-box {
  margin: 18px 0 8px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
}

.facts-box summary {
  padding: 13px 16px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.facts-box summary::-webkit-details-marker { display: none; }

.facts-box summary::before {
  content: "＋";
  font-size: 11px;
  color: var(--muted);
}

.facts-box[open] summary::before { content: "－"; }

.facts-note {
  font-size: 10.5px;
  color: #b0b0ac;
  letter-spacing: 0.04em;
}

.facts-box pre {
  margin: 0;
  padding: 4px 16px 16px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11.5px;
  line-height: 1.95;
  color: #6b6b68;
  white-space: pre-wrap;
  word-break: break-word;
}

@media (max-width: 640px) {
  body { padding: 0 20px 72px; }
  .hero { padding: 52px 0 34px; }
  .hero h1 { font-size: 32px; line-height: 1.4; }
  .lede { font-size: 14px; }
  .pc { display: none; }
  .systems { gap: 18px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .sys-btn { font-size: 14px; white-space: nowrap; }
  .field-row { grid-template-columns: 1fr; gap: 0; }
  .field-row .field { margin-bottom: 28px; }
  .submit-row { flex-direction: column; align-items: stretch; gap: 14px; }
  .primary { width: 100%; padding: 15px 0; }
  .head-note { display: none; }
  .section h2 { font-size: 22px; }
}