/* ===========================================================================
   冲击波英语 · AI 口语训练场 —— 样式
   learn/assets/speaking-arena.css
   全部选择器以 .ie-spk 开头，不会碰到站点其他样式。
   =========================================================================== */

.ie-spk {
  --blue: #0756c8;
  --deep: #061b3a;
  --orange: #f28a00;
  --teal: #0b8f83;
  --sky: #eef6ff;
  --ink: #102238;
  --line: #e3e9f4;
  --muted: #5b6b85;
  font-family: "Noto Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
}

.ie-spk * { box-sizing: border-box; }
.ie-spk a { text-decoration: none; }
.ie-spk p { margin: 0 0 12px; }
.ie-spk button { font-family: inherit; cursor: pointer; }
.ie-spk .spk-hidden { display: none !important; }

.ie-spk .spk-wrap { max-width: 1244px; margin: 0 auto; padding: 0 32px; }

/* ------------------------------------------------------------------ 横幅 */
.ie-spk .spk-hero {
  background: linear-gradient(135deg, #061b3a 0%, #0b2f63 55%, #0756c8 100%);
  color: #fff;
  padding: 84px 0 76px;
  position: relative;
  overflow: hidden;
}
.ie-spk .spk-hero:after {
  content: "";
  position: absolute;
  right: -130px;
  top: -130px;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242, 138, 0, .30), transparent 68%);
}
.ie-spk .spk-hero .spk-wrap { position: relative; z-index: 2; }
.ie-spk .spk-k {
  font-size: 12.5px;
  letter-spacing: 2.6px;
  color: #8fb3e6;
  margin-bottom: 16px;
}
.ie-spk .spk-hero h1 {
  font-size: 43px;
  line-height: 1.18;
  margin: 0 0 14px;
  font-weight: 700;
  letter-spacing: .5px;
  color: #fff;
}
.ie-spk .spk-lead {
  font-size: 17px;
  color: #cfe0f7;
  max-width: 700px;
  margin: 0 0 22px;
}
.ie-spk .spk-chips { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.ie-spk .spk-chips span {
  font-size: 13px;
  padding: 6px 15px;
  border: 1px solid rgba(255, 255, 255, .28);
  border-radius: 999px;
  color: #dbe8fa;
}
.ie-spk .spk-btns { display: flex; flex-wrap: wrap; gap: 12px; }
.ie-spk .spk-btn {
  display: inline-block;
  padding: 14px 27px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 0;
  border: 0;
}
.ie-spk .spk-btn.p { background: var(--orange); color: #fff; }
.ie-spk .spk-btn.s {
  background: rgba(255, 255, 255, .12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, .32);
}

/* -------------------------------------------------------------- 三步说明 */
.ie-spk .spk-how { padding: 46px 0 6px; }
.ie-spk .spk-how h2 { font-size: 22px; color: var(--deep); margin: 0 0 18px; font-weight: 700; }
.ie-spk .spk-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.ie-spk .spk-step {
  background: #fff;
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
  padding: 20px 20px 18px;
  box-shadow: 0 10px 26px rgba(6, 27, 58, .06);
}
.ie-spk .spk-step b { display: block; font-size: 15px; color: var(--blue); margin-bottom: 7px; }
.ie-spk .spk-step p { margin: 0; font-size: 14px; color: #41506b; line-height: 1.7; }

/* ------------------------------------------------------------------ 舞台 */
.ie-spk .spk-stage-band { background: var(--sky); padding: 44px 0 64px; margin-top: 34px; }
.ie-spk .spk-stage-band h2 { font-size: 24px; color: var(--deep); margin: 0 0 6px; font-weight: 700; }
.ie-spk .spk-stage-band .spk-note { font-size: 14.5px; color: var(--muted); margin: 0 0 24px; }

/* 场景选择 */
.ie-spk .spk-scenes { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.ie-spk .spk-scene {
  background: #fff;
  border: 1px solid var(--line);
  border-bottom: 4px solid #d7e2f4;
  padding: 18px 14px 16px;
  text-align: left;
  transition: transform .16s, box-shadow .16s, border-color .16s;
}
.ie-spk .spk-scene:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(6, 27, 58, .12); }
.ie-spk .spk-scene.on { border-bottom-color: var(--orange); background: #fffaf2; }
.ie-spk .spk-scene .n { font-size: 12px; color: #a9b8ce; letter-spacing: 1.4px; margin-bottom: 6px; }
.ie-spk .spk-scene .t { font-size: 16.5px; font-weight: 700; color: var(--deep); margin-bottom: 4px; }
.ie-spk .spk-scene .d { font-size: 12.5px; color: var(--muted); line-height: 1.6; }

/* 卡片 */
.ie-spk .spk-card {
  background: #fff;
  border: 1px solid var(--line);
  padding: 24px 24px 22px;
  margin-top: 18px;
  box-shadow: 0 12px 30px rgba(6, 27, 58, .06);
}
.ie-spk .spk-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 1.6px;
  color: #fff;
  background: var(--blue);
  padding: 4px 12px;
  margin-bottom: 12px;
}
.ie-spk .spk-prompt { font-size: 17px; color: var(--deep); font-weight: 600; margin: 0 0 10px; }
.ie-spk .spk-tip { font-size: 13.5px; color: var(--muted); margin: 0; }

/* 输入 */
.ie-spk .spk-microw { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 14px; }
.ie-spk .spk-mic {
  background: var(--deep);
  color: #fff;
  border: 0;
  padding: 13px 24px;
  font-size: 15px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 9px;
}
.ie-spk .spk-mic .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #8fb3e6;
  display: inline-block;
}
.ie-spk .spk-mic.live { background: #b3261e; }
.ie-spk .spk-mic.live .dot { background: #ffd9d6; }
.ie-spk .spk-mic.off { background: #7d8899; }
.ie-spk .spk-hint { font-size: 13px; color: var(--muted); flex: 1; min-width: 200px; }
.ie-spk .spk-ta {
  width: 100%;
  min-height: 116px;
  border: 1px solid #cdd9ea;
  background: #fbfdff;
  padding: 14px 16px;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--ink);
  font-family: inherit;
  resize: vertical;
}
.ie-spk .spk-ta:focus { outline: 2px solid #b5d4f4; border-color: var(--blue); }
.ie-spk .spk-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 14px;
  flex-wrap: wrap;
}
.ie-spk .spk-count { font-size: 13px; color: #93a2b8; }
.ie-spk .spk-go {
  background: var(--orange);
  color: #fff;
  border: 0;
  padding: 14px 30px;
  font-size: 15.5px;
  font-weight: 700;
}
.ie-spk .spk-go[disabled] { background: #c9d3e0; cursor: not-allowed; }

/* 结果 */
.ie-spk .spk-result { margin-top: 20px; }
.ie-spk .spk-verdict {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: #8a4b00;
  background: #fff2df;
  border: 1px solid #f6d9ab;
  padding: 6px 14px;
  margin-bottom: 14px;
}
.ie-spk .spk-verdict.ok { color: #0a6b52; background: #e5f7f0; border-color: #a9e0cd; }
.ie-spk .spk-verdict.bad { color: #8a1f1f; background: #fdecec; border-color: #f3c2c2; }

.ie-spk .spk-list { list-style: none; margin: 0 0 6px; padding: 0; }
.ie-spk .spk-item {
  border: 1px solid var(--line);
  border-left: 4px solid var(--blue);
  background: #fff;
  padding: 16px 18px 14px;
  margin-bottom: 12px;
}
.ie-spk .spk-you {
  font-size: 15px;
  color: #7a3a3a;
  background: #fdf3f3;
  display: inline-block;
  padding: 3px 10px;
  margin-bottom: 8px;
  text-decoration: line-through;
  text-decoration-color: #e0a9a9;
}
.ie-spk .spk-arrow { color: #b4b2a9; font-size: 13px; margin: 0 0 6px; }
.ie-spk .spk-better {
  font-size: 17.5px;
  font-weight: 600;
  color: #0756c8;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.ie-spk .spk-say {
  border: 1px solid #c9d6ea;
  background: #fff;
  color: var(--blue);
  font-size: 13px;
  padding: 5px 14px;
  font-weight: 600;
  white-space: nowrap;
}
.ie-spk .spk-say:hover { background: var(--sky); }
.ie-spk .spk-why { font-size: 14px; color: var(--muted); margin: 0; }
.ie-spk .spk-next {
  font-size: 15px;
  color: #0b3d2c;
  background: #e9f7f1;
  border-left: 4px solid var(--teal);
  padding: 14px 18px;
  margin: 16px 0 0;
}
.ie-spk .spk-praise {
  font-size: 16.5px;
  font-weight: 600;
  color: #0a6b52;
  background: #e5f7f0;
  border-left: 4px solid var(--teal);
  padding: 16px 18px;
  margin: 0 0 16px;
}
.ie-spk .spk-loading {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: var(--muted);
  padding: 20px 0;
}
.ie-spk .spk-spin {
  width: 18px;
  height: 18px;
  border: 2px solid #d7e2f4;
  border-top-color: var(--blue);
  border-radius: 50%;
  animation: spk-rot .9s linear infinite;
}
@keyframes spk-rot { to { transform: rotate(360deg); } }
.ie-spk .spk-err {
  font-size: 15px;
  color: #8a1f1f;
  background: #fdecec;
  border: 1px solid #f3c2c2;
  padding: 14px 18px;
  margin-top: 16px;
}
.ie-spk .spk-acts { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 18px; }
.ie-spk .spk-again {
  background: var(--blue);
  color: #fff;
  border: 0;
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 600;
}
.ie-spk .spk-ghost {
  background: #fff;
  color: var(--blue);
  border: 1px solid #c9d6ea;
  padding: 13px 26px;
  font-size: 15px;
  font-weight: 600;
}

/* 底部 CTA */
.ie-spk .spk-cta {
  background: linear-gradient(135deg, #061b3a, #0b2f63);
  color: #fff;
  padding: 56px 0;
  text-align: center;
}
.ie-spk .spk-cta h2 { font-size: 27px; margin: 0 0 12px; color: #fff; font-weight: 700; }
.ie-spk .spk-cta p { color: #cfe0f7; max-width: 660px; margin: 0 auto 26px; font-size: 15.5px; }
.ie-spk .spk-cta .spk-btns { justify-content: center; }

/* 响应式 */
@media (max-width: 1080px) {
  .ie-spk .spk-scenes { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 900px) {
  .ie-spk .spk-steps { grid-template-columns: 1fr; }
  .ie-spk .spk-hero h1 { font-size: 33px; }
  .ie-spk .spk-wrap { padding: 0 20px; }
}
@media (max-width: 640px) {
  .ie-spk .spk-scenes { grid-template-columns: repeat(2, 1fr); }
  .ie-spk .spk-hero { padding: 56px 0 52px; }
  .ie-spk .spk-hero h1 { font-size: 28px; }
  .ie-spk .spk-card { padding: 18px 16px 16px; }
  .ie-spk .spk-go { width: 100%; }
  .ie-spk .spk-better { font-size: 16.5px; }
}