/* ============================================================
   跨境汇款手续费与到账金额计算器
   视觉隐喻：SWIFT 汇款路径图 / 航线蓝图
   ============================================================ */

.xf-page {
  --xf-sky: #eaf1f8;
  --xf-panel: #ffffff;
  --xf-panel-2: #f5f9fd;
  --xf-ink: #0b2135;
  --xf-ink-2: #27435c;
  --xf-muted: #5f778f;
  --xf-line: #d8e4ef;
  --xf-line-2: #b6cbdd;
  --xf-teal: #0d7f74;
  --xf-teal-soft: #e0f1ee;
  --xf-cyan: #149db4;
  --xf-cyan-soft: #e3f5f8;
  --xf-amber: #c07410;
  --xf-amber-soft: #fbf0dd;
  --xf-red: #b03f2c;
  --xf-blue: #17486f;
  --xf-shadow: 0 20px 46px rgba(12, 42, 68, .1);
  --xf-shadow-sm: 0 4px 14px rgba(12, 42, 68, .06);
  --xf-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --xf-mono: "SF Mono", ui-monospace, "Cascadia Mono", Consolas, "Roboto Mono", "Courier New", monospace;

  min-height: 100vh;
  color: var(--xf-ink);
  font-family: var(--xf-sans);
  background-color: var(--xf-sky);
  background-image:
    linear-gradient(rgba(23, 72, 111, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 72, 111, .05) 1px, transparent 1px);
  background-size: 30px 30px;
  -webkit-font-smoothing: antialiased;
}

:root[data-theme="dark"] .xf-page {
  --xf-sky: #061320;
  --xf-panel: #0d1f31;
  --xf-panel-2: #122941;
  --xf-ink: #e7f1f9;
  --xf-ink-2: #bfd4e4;
  --xf-muted: #89a3b9;
  --xf-line: #1c3348;
  --xf-line-2: #2c4b66;
  --xf-teal: #4ed3b8;
  --xf-teal-soft: #103a34;
  --xf-cyan: #5ad3e4;
  --xf-cyan-soft: #0f3541;
  --xf-amber: #efb163;
  --xf-amber-soft: #3a2b15;
  --xf-red: #ff9078;
  --xf-blue: #8ec3ea;
  --xf-shadow: 0 22px 50px rgba(0, 0, 0, .55);
  --xf-shadow-sm: 0 6px 16px rgba(0, 0, 0, .4);
  background-image:
    linear-gradient(rgba(110, 180, 230, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(110, 180, 230, .045) 1px, transparent 1px);
}

.xf-wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: 14px 20px 8px;
}

/* ---------- 面包屑 ---------- */
.xf-crumb { font-size: 12.5px; color: var(--xf-muted); margin-bottom: 14px; letter-spacing: .01em; }
.xf-crumb a { color: var(--xf-muted); text-decoration: none; }
.xf-crumb a:hover { color: var(--xf-teal); }
.xf-crumb span { color: var(--xf-ink-2); }

/* ---------- 首屏 ---------- */
.xf-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 322px;
  gap: 40px;
  align-items: center;
  padding: 4px 0 26px;
}

.xf-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--xf-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--xf-teal);
  margin-bottom: 14px;
}
.xf-eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, var(--xf-cyan), transparent);
}

.xf-hero h1 {
  margin: 0 0 14px;
  font-size: clamp(27px, 3.5vw, 41px);
  line-height: 1.24;
  letter-spacing: -.025em;
  font-weight: 800;
  color: var(--xf-ink);
}
.xf-hero h1 b {
  color: var(--xf-teal);
  font-weight: 800;
  background: linear-gradient(180deg, transparent 68%, var(--xf-teal-soft) 68%);
  padding: 0 2px;
}

.xf-sub {
  margin: 0;
  max-width: 640px;
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--xf-muted);
}
.xf-sub b { color: var(--xf-ink-2); font-weight: 700; }

.xf-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.xf-hero-tags span {
  padding: 5px 11px;
  border: 1px solid var(--xf-line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--xf-panel) 78%, transparent);
  font-size: 11.5px;
  color: var(--xf-muted);
  letter-spacing: .02em;
}

/* ---------- 首屏航线卡 ---------- */
.xf-route {
  position: relative;
  padding: 18px 20px 16px;
  border: 1px solid var(--xf-line-2);
  border-radius: 14px;
  background:
    radial-gradient(120% 90% at 100% 0%, color-mix(in srgb, var(--xf-cyan) 9%, transparent), transparent 62%),
    var(--xf-panel);
  box-shadow: var(--xf-shadow-sm);
  overflow: hidden;
}
.xf-route::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, color-mix(in srgb, var(--xf-line-2) 70%, transparent) 1px, transparent 1px);
  background-size: 12px 12px;
  opacity: .5;
  pointer-events: none;
}
.xf-route-top {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--xf-line-2);
  margin-bottom: 14px;
}
.xf-route-badge {
  font-family: var(--xf-mono);
  font-size: 10px;
  letter-spacing: .14em;
  color: var(--xf-blue);
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--xf-cyan-soft);
  border: 1px solid color-mix(in srgb, var(--xf-cyan) 30%, transparent);
}
.xf-route-live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10.5px;
  color: var(--xf-muted);
}
.xf-route-live i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--xf-teal);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--xf-teal) 18%, transparent);
  animation: xfPulse 2.4s ease-in-out infinite;
}
@keyframes xfPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .35; }
}

.xf-flow {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.xf-flow li {
  position: relative;
  display: grid;
  grid-template-columns: 16px minmax(0, 1fr);
  gap: 12px;
  padding-bottom: 14px;
}
.xf-flow li:last-child { padding-bottom: 0; }
.xf-flow li:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 16px;
  bottom: 0;
  border-left: 1px dashed var(--xf-line-2);
}
.xf-dot {
  position: relative;
  z-index: 1;
  width: 15px;
  height: 15px;
  margin-top: 3px;
  border-radius: 50%;
  border: 2px solid var(--xf-line-2);
  background: var(--xf-panel);
  box-sizing: border-box;
}
.xf-flow .is-send .xf-dot { border-color: var(--xf-blue); }
.xf-flow .is-fee .xf-dot { border-color: var(--xf-amber); background: var(--xf-amber-soft); }
.xf-flow .is-arrive .xf-dot {
  border-color: var(--xf-teal);
  background: var(--xf-teal);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--xf-teal) 16%, transparent);
}

.xf-flow-body { min-width: 0; }
.xf-flow-body span {
  display: block;
  font-size: 10.5px;
  letter-spacing: .04em;
  color: var(--xf-muted);
  margin-bottom: 2px;
}
.xf-flow-body b {
  display: block;
  font-family: var(--xf-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--xf-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.xf-flow-body b em { font-style: normal; }
.xf-flow-body small {
  display: block;
  margin-top: 3px;
  font-size: 10.5px;
  color: var(--xf-muted);
}
.xf-flow .is-fee b { color: var(--xf-amber); font-size: 14px; }
.xf-flow .is-arrive b { color: var(--xf-teal); font-size: 19px; }
.xf-flow .is-arrive span { color: var(--xf-teal); font-weight: 600; }

.xf-route-foot {
  position: relative;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-top: 14px;
  padding-top: 10px;
  border-top: 1px dashed var(--xf-line-2);
  font-size: 11px;
  color: var(--xf-muted);
}
.xf-route-foot b { font-family: var(--xf-mono); color: var(--xf-ink-2); }

/* ---------- 工作台 ---------- */
.xf-board {
  display: grid;
  grid-template-columns: minmax(0, 452px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.xf-card {
  border: 1px solid var(--xf-line);
  border-radius: 14px;
  background: var(--xf-panel);
  box-shadow: var(--xf-shadow-sm);
}

.xf-form { padding: 18px 20px 20px; }
.xf-form-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--xf-line);
  margin-bottom: 16px;
}
.xf-form-head h2 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.xf-form-head h2 em {
  font-style: normal;
  font-family: var(--xf-mono);
  font-size: 11px;
  color: var(--xf-cyan);
  margin-right: 7px;
}
.xf-form-head span { font-size: 11.5px; color: var(--xf-muted); }

.xf-group + .xf-group { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--xf-line); }
.xf-group-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--xf-muted);
  margin-bottom: 12px;
  text-transform: uppercase;
}
.xf-group-title::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: var(--xf-cyan);
  transform: rotate(45deg);
}

.xf-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
}
.xf-row + .xf-row { margin-top: 12px; }
.xf-row.three { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr); }
.xf-row.one { grid-template-columns: minmax(0, 1fr); }

.xf-field { min-width: 0; }
.xf-field > label {
  display: flex;
  align-items: baseline;
  justify-content: flex-start;
  gap: 6px;
  font-size: 12px;
  color: var(--xf-muted);
  margin-bottom: 6px;
}
.xf-field > label em {
  font-style: normal;
  font-size: 10.5px;
  color: color-mix(in srgb, var(--xf-muted) 82%, transparent);
  white-space: nowrap;
}

.xf-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
  border: 1px solid var(--xf-line);
  border-radius: 8px;
  background: var(--xf-panel-2);
  transition: border-color .16s ease, box-shadow .16s ease, background .16s ease;
}
.xf-input-wrap:focus-within {
  border-color: var(--xf-cyan);
  background: var(--xf-panel);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--xf-cyan) 14%, transparent);
}
.xf-input-wrap .unit {
  flex: none;
  padding: 0 10px;
  font-family: var(--xf-mono);
  font-size: 11.5px;
  color: var(--xf-muted);
}
.xf-input-wrap .unit.pre { padding-right: 2px; }
.xf-input-wrap input,
.xf-input-wrap select {
  flex: 1;
  min-width: 0;
  width: 100%;
  box-sizing: border-box;
  padding: 10px 11px;
  border: 0;
  background: transparent;
  color: var(--xf-ink);
  font-family: var(--xf-mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -.01em;
  outline: none;
  appearance: none;
}
.xf-input-wrap .unit.pre + input { padding-left: 3px; }
.xf-input-wrap select {
  font-family: var(--xf-sans);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  padding-right: 28px;
}
.xf-input-wrap.has-select::after {
  content: "";
  position: absolute;
  right: 11px;
  width: 6px;
  height: 6px;
  border-right: 1.5px solid var(--xf-muted);
  border-bottom: 1.5px solid var(--xf-muted);
  transform: rotate(45deg) translateY(-2px);
  pointer-events: none;
}
.xf-input-wrap input.err,
.xf-input-wrap.err { border-color: var(--xf-red); }
.xf-input-wrap input:disabled { color: var(--xf-muted); cursor: not-allowed; }
.xf-input-wrap input:read-only { color: var(--xf-ink-2); cursor: default; }
.xf-field .hint {
  display: block;
  margin-top: 5px;
  font-size: 10.5px;
  color: var(--xf-muted);
  line-height: 1.6;
}
.xf-field .hint.warn { color: var(--xf-red); }

/* 分段控件 */
.xf-seg {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--xf-line);
  border-radius: 8px;
  background: var(--xf-panel-2);
}
.xf-seg button {
  padding: 7px 4px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--xf-muted);
  font-family: var(--xf-sans);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: background .16s ease, color .16s ease, box-shadow .16s ease;
}
.xf-seg button:hover { color: var(--xf-ink-2); }
.xf-seg button.on {
  background: var(--xf-panel);
  color: var(--xf-teal);
  box-shadow: 0 1px 4px rgba(12, 42, 68, .12);
}

/* 预设 chip */
.xf-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 8px;
}
.xf-chips button {
  padding: 3px 6px;
  border: 1px solid var(--xf-line);
  border-radius: 999px;
  background: transparent;
  color: var(--xf-muted);
  font-family: var(--xf-mono);
  font-size: 10.5px;
  cursor: pointer;
  transition: all .15s ease;
}
.xf-chips button:hover { border-color: var(--xf-cyan); color: var(--xf-cyan); }
.xf-chips button.on {
  border-color: transparent;
  background: var(--xf-cyan-soft);
  color: var(--xf-teal);
  font-weight: 700;
}

/* 提示条 */
.xf-hintbar {
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  border-left: 3px solid var(--xf-cyan);
  background: var(--xf-cyan-soft);
  font-size: 11.5px;
  line-height: 1.75;
  color: var(--xf-ink-2);
}
.xf-hintbar.err {
  border-left-color: var(--xf-red);
  background: color-mix(in srgb, var(--xf-red) 9%, transparent);
  color: var(--xf-red);
}
.xf-hintbar.hide { display: none; }

/* 按钮 */
.xf-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 16px;
}
.xf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: var(--xf-teal);
  color: #fff;
  font-family: var(--xf-sans);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .01em;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
:root[data-theme="dark"] .xf-page .xf-btn { color: #04211c; }
.xf-btn:hover { transform: translateY(-1px); box-shadow: 0 6px 16px color-mix(in srgb, var(--xf-teal) 26%, transparent); }
.xf-btn:active { transform: translateY(0); }
.xf-btn.ghost {
  background: transparent;
  border-color: var(--xf-line-2);
  color: var(--xf-ink-2);
  font-weight: 600;
}
.xf-btn.ghost:hover {
  border-color: var(--xf-cyan);
  color: var(--xf-teal);
  box-shadow: none;
}
.xf-btn.small { padding: 8px 14px; font-size: 12px; }
.xf-btn:disabled { opacity: .6; cursor: not-allowed; transform: none; box-shadow: none; }

/* ---------- 结果卡 ---------- */
.xf-result {
  position: relative;
  padding: 20px 22px 22px;
  overflow: hidden;
}
.xf-result::before {
  content: "";
  position: absolute;
  top: -70px;
  right: -60px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--xf-teal) 12%, transparent), transparent 68%);
  pointer-events: none;
}
.xf-result-head {
  position: relative;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--xf-muted);
}
.xf-result-head b {
  font-family: var(--xf-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--xf-muted);
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--xf-panel-2);
  border: 1px solid var(--xf-line);
}

.xf-arrive {
  position: relative;
  margin: 12px 0 2px;
  font-family: var(--xf-mono);
  font-size: clamp(34px, 4.6vw, 50px);
  font-weight: 700;
  letter-spacing: -.035em;
  line-height: 1.08;
  color: var(--xf-teal);
  word-break: break-all;
}
.xf-arrive small {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0;
  color: var(--xf-muted);
  margin-left: 8px;
}
.xf-arrive-note {
  position: relative;
  margin: 0 0 16px;
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--xf-muted);
}
.xf-arrive-note b { color: var(--xf-ink-2); font-weight: 700; }

.xf-metrics {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--xf-line);
  border-bottom: 1px solid var(--xf-line);
  margin-bottom: 16px;
}
.xf-metrics > div {
  padding: 12px 10px 12px 0;
}
.xf-metrics > div + div {
  padding-left: 14px;
  border-left: 1px solid var(--xf-line);
}
.xf-metrics span {
  display: block;
  font-size: 10.5px;
  color: var(--xf-muted);
  margin-bottom: 4px;
  letter-spacing: .02em;
}
.xf-metrics b {
  display: block;
  font-family: var(--xf-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--xf-ink);
  white-space: nowrap;
}
.xf-metrics b.hi { color: var(--xf-amber); }
.xf-metrics b.ok { color: var(--xf-teal); }

/* 到账瀑布 */
.xf-waterfall {
  position: relative;
  margin-bottom: 16px;
}
.xf-wf-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  font-size: 11.5px;
  color: var(--xf-muted);
  margin-bottom: 8px;
}
.xf-wf-title b { font-family: var(--xf-mono); font-size: 10.5px; font-weight: 500; }
.xf-wf-bar {
  display: flex;
  height: 12px;
  border-radius: 6px;
  overflow: hidden;
  background: var(--xf-panel-2);
}
.xf-wf-bar i {
  display: block;
  height: 100%;
  width: 0;
  transition: width .35s ease;
}
.xf-wf-bar .seg-net { background: var(--xf-teal); }
.xf-wf-bar .seg-spread { background: var(--xf-cyan); }
.xf-wf-bar .seg-fee { background: var(--xf-amber); }
.xf-wf-bar .seg-corr { background: color-mix(in srgb, var(--xf-red) 78%, transparent); }
.xf-wf-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  margin-top: 9px;
  font-size: 11px;
  color: var(--xf-muted);
}
.xf-wf-legend span { display: inline-flex; align-items: center; gap: 6px; }
.xf-wf-legend i {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  flex: none;
}
.xf-wf-legend b { font-family: var(--xf-mono); color: var(--xf-ink-2); }

/* 费用明细 */
.xf-breakdown {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px dashed var(--xf-line);
}
.xf-breakdown li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--xf-line);
  font-size: 12.5px;
}
.xf-breakdown li:last-child { border-bottom: 0; }
.xf-breakdown span { color: var(--xf-muted); }
.xf-breakdown span em {
  font-style: normal;
  display: block;
  font-size: 10.5px;
  color: color-mix(in srgb, var(--xf-muted) 80%, transparent);
  margin-top: 2px;
}
.xf-breakdown b {
  font-family: var(--xf-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--xf-ink-2);
  white-space: nowrap;
}
.xf-breakdown li.total { padding-top: 11px; }
.xf-breakdown li.total span { color: var(--xf-ink); font-weight: 700; }
.xf-breakdown li.total b { color: var(--xf-teal); font-size: 15px; font-weight: 700; }

.xf-result-tip {
  position: relative;
  margin-top: 14px;
  padding: 9px 11px;
  border-radius: 7px;
  background: var(--xf-amber-soft);
  color: var(--xf-amber);
  font-size: 11px;
  line-height: 1.7;
}

/* ---------- 通用区块 ---------- */
.xf-sec { margin-top: 34px; }
.xf-sec-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.xf-sec-head h2 {
  margin: 0;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.02em;
}
.xf-sec-head h2 em {
  font-style: normal;
  font-family: var(--xf-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--xf-cyan);
  margin-right: 9px;
  vertical-align: 2px;
}
.xf-sec-head p {
  margin: 0;
  max-width: 560px;
  font-size: 12px;
  line-height: 1.75;
  color: var(--xf-muted);
}

/* ---------- 渠道对比 ---------- */
.xf-channels {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.xf-ch {
  position: relative;
  padding: 16px 16px 14px;
  border: 1px solid var(--xf-line);
  border-radius: 12px;
  background: var(--xf-panel);
  box-shadow: var(--xf-shadow-sm);
  transition: border-color .18s ease, transform .18s ease;
}
.xf-ch.best {
  border-color: var(--xf-teal);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--xf-teal) 10%, transparent);
}
.xf-ch.best::after {
  content: "成本最低";
  position: absolute;
  top: -1px;
  right: -1px;
  padding: 3px 9px;
  border-radius: 0 11px 0 8px;
  background: var(--xf-teal);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .04em;
}
:root[data-theme="dark"] .xf-page .xf-ch.best::after { color: #04211c; }
.xf-ch-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--xf-line);
  margin-bottom: 12px;
}
.xf-ch.best .xf-ch-head { padding-right: 72px; }
.xf-ch-head h3 {
  margin: 0;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.xf-ch-head span {
  font-family: var(--xf-mono);
  font-size: 10px;
  color: var(--xf-muted);
}
.xf-ch-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-bottom: 12px;
}
.xf-ch-grid .xf-field > label { font-size: 10.5px; margin-bottom: 4px; }
.xf-ch-grid .xf-ch-grid .xf-field > label em { display: none; }
.xf-ch-grid .xf-input-wrap input { padding: 7px 8px; font-size: 12.5px; }
.xf-ch-grid .xf-input-wrap .unit { padding: 0 6px; font-size: 10px; }
.xf-ch-out {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 8px;
  padding-top: 10px;
  border-top: 1px dashed var(--xf-line);
}
.xf-ch-out span { font-size: 10.5px; color: var(--xf-muted); display: block; margin-bottom: 2px; }
.xf-ch-out b {
  font-family: var(--xf-mono);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--xf-teal);
  display: block;
  white-space: nowrap;
}
.xf-ch-cost {
  text-align: right;
  font-family: var(--xf-mono);
  font-size: 11.5px;
  color: var(--xf-amber);
  font-weight: 700;
  white-space: nowrap;
}
.xf-ch-cost em { display: block; font-style: normal; font-size: 9.5px; color: var(--xf-muted); font-weight: 400; margin-bottom: 2px; }

/* ---------- 反推 ---------- */
.xf-reverse {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 18px;
  align-items: center;
  padding: 18px 20px;
}
.xf-reverse .xf-sec-head { margin-bottom: 12px; }
.xf-reverse h2 { font-size: 17px; }
.xf-reverse-need {
  text-align: right;
  padding-left: 18px;
  border-left: 1px solid var(--xf-line);
}
.xf-reverse-need span { display: block; font-size: 11px; color: var(--xf-muted); margin-bottom: 4px; }
.xf-reverse-need b {
  display: block;
  font-family: var(--xf-mono);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--xf-ink);
  white-space: nowrap;
}
.xf-reverse-need em {
  display: block;
  font-style: normal;
  margin-top: 4px;
  font-size: 11px;
  color: var(--xf-muted);
}

/* ---------- 敏感度表 ---------- */
.xf-tbl-wrap {
  overflow-x: auto;
  border: 1px solid var(--xf-line);
  border-radius: 10px;
  background: var(--xf-panel);
}
.xf-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 12.5px;
}
.xf-table th,
.xf-table td {
  padding: 9px 12px;
  text-align: right;
  border-bottom: 1px solid var(--xf-line);
  white-space: nowrap;
}
.xf-table th {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--xf-muted);
  background: var(--xf-panel-2);
}
.xf-table th:first-child,
.xf-table td:first-child { text-align: left; }
.xf-table td { font-family: var(--xf-mono); color: var(--xf-ink-2); }
.xf-table td:first-child { font-family: var(--xf-sans); color: var(--xf-ink); }
.xf-table tr:last-child td { border-bottom: 0; }
.xf-table tr.cur td { background: color-mix(in srgb, var(--xf-teal) 7%, transparent); }
.xf-table tr.cur td:first-child { font-weight: 700; color: var(--xf-teal); }
.xf-table td.hi { color: var(--xf-teal); font-weight: 700; }
.xf-table td.low { color: var(--xf-amber); }
.xf-table tfoot td {
  border-top: 1.5px solid var(--xf-line-2);
  background: var(--xf-panel-2);
  font-weight: 700;
  color: var(--xf-ink);
}
.xf-table tr.empty td {
  padding: 26px 12px;
  text-align: center;
  font-family: var(--xf-sans);
  font-size: 12px;
  color: var(--xf-muted);
}

/* ---------- 批量 ---------- */
.xf-textarea {
  width: 100%;
  box-sizing: border-box;
  min-height: 150px;
  resize: vertical;
  padding: 12px 14px;
  border: 1px solid var(--xf-line);
  border-radius: 9px;
  background: var(--xf-panel-2);
  color: var(--xf-ink);
  font-family: var(--xf-mono);
  font-size: 12.5px;
  line-height: 1.8;
  outline: none;
  transition: border-color .16s ease, box-shadow .16s ease;
}
.xf-textarea:focus {
  border-color: var(--xf-cyan);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--xf-cyan) 12%, transparent);
}
.xf-textarea::placeholder { color: var(--xf-muted); }
.xf-batch-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  margin: 12px 0 4px;
}
.xf-batch-count {
  margin-left: auto;
  font-family: var(--xf-mono);
  font-size: 11px;
  color: var(--xf-muted);
}
.xf-batch-err {
  display: none;
  margin-top: 8px;
  padding: 9px 12px;
  border-radius: 7px;
  border: 1px solid color-mix(in srgb, var(--xf-red) 38%, transparent);
  background: color-mix(in srgb, var(--xf-red) 8%, transparent);
  color: var(--xf-red);
  font-size: 11.5px;
  line-height: 1.75;
}
.xf-batch-err.on { display: block; }
.xf-batch-note {
  margin-top: 10px;
  font-size: 11px;
  line-height: 1.7;
  color: var(--xf-muted);
}
.xf-batch-note b { color: var(--xf-ink-2); }

/* ---------- AI ---------- */
.xf-ai {
  position: relative;
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  margin-top: 34px;
  padding: 20px 22px;
  border: 1px solid var(--xf-line-2);
  border-radius: 14px;
  background:
    radial-gradient(90% 140% at 0% 0%, color-mix(in srgb, var(--xf-cyan) 10%, transparent), transparent 60%),
    var(--xf-panel);
  box-shadow: var(--xf-shadow-sm);
  overflow: hidden;
}
.xf-ai-badge {
  display: grid;
  place-content: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 1px solid color-mix(in srgb, var(--xf-teal) 40%, transparent);
  background: var(--xf-teal-soft);
  font-family: var(--xf-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--xf-teal);
}
.xf-ai h3 {
  margin: 0 0 5px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.01em;
}
.xf-ai p {
  margin: 0;
  font-size: 12px;
  line-height: 1.8;
  color: var(--xf-muted);
  max-width: 640px;
}
.xf-ai-btn {
  padding: 11px 20px;
  border: 0;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--xf-teal), var(--xf-cyan));
  color: #fff;
  font-family: var(--xf-sans);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: transform .15s ease, box-shadow .15s ease;
}
:root[data-theme="dark"] .xf-page .xf-ai-btn { color: #04211c; }
.xf-ai-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 20px color-mix(in srgb, var(--xf-teal) 28%, transparent); }
.xf-ai-btn:disabled { opacity: .6; cursor: not-allowed; transform: none; }
.xf-ai-status {
  grid-column: 2 / -1;
  display: none;
  margin-top: 2px;
  padding: 12px 14px;
  border-radius: 9px;
  border: 1px solid var(--xf-line);
  background: var(--xf-panel-2);
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--xf-ink-2);
  white-space: pre-wrap;
}
.xf-ai-status.on { display: block; }
.xf-ai-status.err { border-color: color-mix(in srgb, var(--xf-red) 40%, transparent); color: var(--xf-red); }

/* ---------- 文档 ---------- */
.xf-docs { margin-top: 38px; padding-bottom: 30px; }
.xf-docs-head {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--xf-line);
  margin-bottom: 20px;
}
.xf-docs-head h2 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -.02em;
}
.xf-docs-head p {
  margin: 0;
  max-width: 760px;
  font-size: 13px;
  line-height: 1.9;
  color: var(--xf-muted);
}
.xf-docs-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 26px;
}
.xf-doc {
  padding: 18px 20px;
  border: 1px solid var(--xf-line);
  border-radius: 12px;
  background: color-mix(in srgb, var(--xf-panel) 82%, transparent);
}
.xf-doc.wide { grid-column: 1 / -1; }
.xf-doc h3 {
  margin: 0 0 10px;
  font-size: 14.5px;
  font-weight: 700;
  letter-spacing: -.01em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.xf-doc h3::before {
  content: "";
  width: 3px;
  height: 14px;
  border-radius: 2px;
  background: var(--xf-teal);
}
.xf-doc p,
.xf-doc li {
  font-size: 12.5px;
  line-height: 1.95;
  color: var(--xf-muted);
}
.xf-doc p { margin: 0 0 10px; }
.xf-doc p:last-child { margin-bottom: 0; }
.xf-doc b { color: var(--xf-ink-2); font-weight: 700; }
.xf-doc ul,
.xf-doc ol { margin: 0; padding-left: 18px; }
.xf-doc li + li { margin-top: 4px; }
.xf-doc li::marker { color: var(--xf-cyan); }

.xf-formula {
  margin: 10px 0 0;
  padding: 11px 13px;
  border-radius: 8px;
  border: 1px solid var(--xf-line);
  background: var(--xf-panel-2);
  font-family: var(--xf-mono);
  font-size: 11.5px;
  line-height: 1.9;
  color: var(--xf-ink-2);
  overflow-x: auto;
}

.xf-faq { display: grid; gap: 10px; margin-top: 6px; }
.xf-faq details {
  border: 1px solid var(--xf-line);
  border-radius: 9px;
  background: var(--xf-panel);
  overflow: hidden;
}
.xf-faq summary {
  padding: 12px 15px;
  font-size: 13px;
  font-weight: 600;
  color: var(--xf-ink-2);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 36px;
}
.xf-faq summary::-webkit-details-marker { display: none; }
.xf-faq summary::after {
  content: "+";
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--xf-mono);
  font-size: 16px;
  color: var(--xf-cyan);
  transition: transform .2s ease;
}
.xf-faq details[open] summary::after { content: "−"; }
.xf-faq .xf-faq-body {
  padding: 0 15px 13px;
  font-size: 12.5px;
  line-height: 1.95;
  color: var(--xf-muted);
}
.xf-faq .xf-faq-body b { color: var(--xf-ink-2); }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .xf-hero { grid-template-columns: minmax(0, 1fr) 290px; gap: 26px; }
  .xf-board { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
}

@media (max-width: 900px) {
  .xf-hero { grid-template-columns: minmax(0, 1fr); gap: 20px; }
  .xf-route { max-width: 460px; }
  .xf-board { grid-template-columns: minmax(0, 1fr); }
  .xf-channels { grid-template-columns: minmax(0, 1fr); }
  .xf-docs-grid { grid-template-columns: minmax(0, 1fr); }
  .xf-reverse { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .xf-reverse-need {
    text-align: left;
    padding-left: 0;
    padding-top: 12px;
    border-left: 0;
    border-top: 1px dashed var(--xf-line);
  }
}

@media (max-width: 620px) {
  .xf-wrap { padding: 12px 14px 4px; }
  .xf-hero h1 { font-size: 25px; }
  .xf-sub { font-size: 13.5px; }
  .xf-form { padding: 16px 15px 18px; }
  .xf-result { padding: 18px 16px 18px; }
  .xf-row.three { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .xf-metrics { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .xf-metrics > div:nth-child(3) {
    grid-column: 1 / -1;
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--xf-line);
  }
  .xf-ai { grid-template-columns: 44px minmax(0, 1fr); gap: 14px; }
  .xf-ai-badge { width: 44px; height: 44px; font-size: 12px; }
  .xf-ai-btn { grid-column: 1 / -1; width: 100%; }
  .xf-ai-status { grid-column: 1 / -1; }
  .xf-ch-grid { gap: 6px; }
  .xf-chips { gap: 6px; }
  .xf-chips button { padding: 5px 9px; font-size: 11.5px; }
  .xf-docs-head h2 { font-size: 19px; }
  .xf-arrive { font-size: 34px; }
}

@media (max-width: 420px) {
  .xf-hero h1 { font-size: 23px; }
  .xf-hero-tags span { font-size: 10.5px; padding: 4px 9px; }
  .xf-row { grid-template-columns: minmax(0, 1fr); }
  .xf-row.three { grid-template-columns: minmax(0, 1fr); }
  .xf-ch-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .xf-metrics { grid-template-columns: minmax(0, 1fr); }
  .xf-metrics > div + div { padding-left: 0; border-left: 0; border-top: 1px solid var(--xf-line); }
  .xf-arrive { font-size: 29px; }
  .xf-flow-body b { font-size: 14px; }
  .xf-flow .is-arrive b { font-size: 17px; }
}

@media print {
  .xf-page { background: #fff; }
  .xf-route, .xf-ai, .xf-actions, .xf-batch-bar, .xf-crumb { display: none !important; }
  .xf-board { grid-template-columns: minmax(0, 1fr); }
  .xf-card, .xf-ch { box-shadow: none; }
}