/* ============ Echo by flomo · light & warm · refined ============ */

:root {
  --bg: #fbfaf7;
  --ink: #23261f;
  --ink-dim: #74796f;
  --ink-faint: #a6aa9e;
  --green: #07c160;
  --green-deep: #0a8a48;
  --green-soft: #e6f4ea;
  --green-mist: #f0f7f1;
  --peach: #f7efe3;
  --line: rgba(35, 38, 31, 0.08);
  --card: #ffffff;
  --radius-lg: 26px;
  --radius-md: 16px;
  --font-en: "Outfit", sans-serif;
  --font-zh: "Outfit", -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-zh);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.75;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

main { width: 100%; max-width: 100%; overflow-x: hidden; }

a { color: inherit; text-decoration: none; }
em { font-style: normal; color: var(--green); font-weight: 500; }

.wrap { max-width: 1020px; margin: 0 auto; padding: 0 28px; }

/* ============ 品牌 mark（气泡 + 星 / 眨眼） ============ */

.mark { display: inline-block; line-height: 0; }
.mark svg { width: 100%; height: 100%; display: block; }
.mark-sm { width: 24px; height: 24px; }
.mark-lg {
  width: 56px; height: 56px;
  filter: drop-shadow(0 8px 20px rgba(52, 180, 130, 0.28));
  margin-bottom: 26px;
}

/* 星 ↔ 眨眼：4s 一个周期，末尾眨一下 */
.face-star { transform-origin: 24px 23px; animation: star-cycle 6s ease-in-out infinite; }
.face-wink { transform-origin: 24px 23px; animation: wink-cycle 6s ease-in-out infinite; }
.face-wink .eye-closed { animation: peek-shut 6s linear infinite; }
.face-wink .eye-peek { animation: peek-open 6s linear infinite; }

/* 星星 → 「>丨」脸;脸停留期间,挤着的「>」睁开成「丨」再闭回,两次;再回星星 */
@keyframes star-cycle {
  0%, 58%   { opacity: 1; transform: scale(1) rotate(0deg); }
  62%, 90%  { opacity: 0; transform: scale(0.55) rotate(45deg); }
  95%, 100% { opacity: 1; transform: scale(1) rotate(0deg); }
}
@keyframes wink-cycle {
  0%, 58%   { opacity: 0; transform: scale(0.85); }
  62%, 90%  { opacity: 1; transform: scale(1); }
  95%, 100% { opacity: 0; transform: scale(0.85); }
}
@keyframes peek-shut {
  0%, 65.9%   { opacity: 1; }
  66%, 69.9%  { opacity: 0; }
  70%, 74.9%  { opacity: 1; }
  75%, 78.9%  { opacity: 0; }
  79%, 100%   { opacity: 1; }
}
@keyframes peek-open {
  0%, 65.9%   { opacity: 0; }
  66%, 69.9%  { opacity: 1; }
  70%, 74.9%  { opacity: 0; }
  75%, 78.9%  { opacity: 1; }
  79%, 100%   { opacity: 0; }
}

/* ============ NAV ============ */

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: rgba(251, 250, 247, 0);
  transition: background 0.4s ease, box-shadow 0.4s ease;
}
.nav.scrolled {
  background: rgba(251, 250, 247, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line);
}
.nav-inner {
  max-width: 1020px;
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand { display: flex; align-items: center; gap: 9px; }
.nav-echo { font-family: var(--font-en); font-weight: 500; font-size: 17px; letter-spacing: -0.01em; }
.nav-by { font-size: 11.5px; color: var(--ink-faint); letter-spacing: 0.04em; }

.nav-cta {
  font-size: 13.5px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-weight: 500;
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.25s;
}
.nav-cta:hover { transform: scale(1.03); opacity: 0.9; }

/* ============ HERO ============ */

.hero { padding: clamp(7rem, 15vh, 10rem) 0 clamp(2rem, 4vh, 3rem); }

.hero-title {
  font-family: var(--font-en);
  font-weight: 600;
  font-size: clamp(2.2rem, 4.4vw, 3rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero-tag {
  margin-top: 14px;
  font-size: clamp(1.05rem, 1.9vw, 1.3rem);
  font-weight: 400;
  line-height: 1.65;
}

.hero-desc {
  margin-top: 12px;
  max-width: 34rem;
  color: var(--ink-dim);
  font-size: 14.5px;
}

.hero-ctas {
  margin-top: 30px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============ 按钮 ============ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  font-family: var(--font-zh);
  cursor: pointer;
  border: none;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.25s, background 0.25s;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: scale(0.98); }

.btn-dark { background: var(--ink); color: #fff; }
.btn-dark:hover { opacity: 0.9; }

.btn-soft { background: #efeee8; color: var(--ink); }
.btn-soft:hover { background: #e8e6df; }

.btn-mobile-only { display: none; }

/* ============ 主视觉：色块 + 手机 ============ */

.showcase { padding: clamp(1.5rem, 4vh, 3rem) 0 clamp(3.5rem, 7vh, 5rem); }

.stage {
  background: linear-gradient(160deg, var(--green-soft), var(--green-mist) 55%, var(--peach));
  border-radius: var(--radius-lg);
  padding: clamp(2.2rem, 5.5vw, 4rem);
  display: flex;
  justify-content: center;
}
.stage-inner { display: flex; flex-direction: column; align-items: center; }
.stage-cap {
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--green-deep);
  opacity: 0.75;
  margin-bottom: 1.1rem;
}

.first-lines { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.first-lines span {
  font-size: 12px;
  color: var(--green-deep);
  background: var(--green-mist);
  border: 1px solid rgba(10, 138, 72, 0.12);
  border-radius: 999px;
  padding: 3px 11px;
}

.phone {
  width: min(340px, 100%);
  background: #f2f2f4;
  border-radius: 30px;
  border: 1px solid rgba(35, 38, 31, 0.08);
  box-shadow: 0 22px 55px rgba(35, 60, 40, 0.13);
  overflow: hidden;
}

.phone-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 15px 10px;
  background: #f7f7f9;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  font-size: 15px;
}
.phone-back { color: #333; font-size: 20px; line-height: 1; }
.phone-name { font-weight: 500; color: #111; font-size: 14.5px; }
.phone-more { color: #333; letter-spacing: 1px; }

.phone-chat {
  padding: 16px 13px 22px;
  display: flex;
  flex-direction: column;
  gap: 11px;
  min-height: 360px;
}

.msg { display: flex; }
.msg p {
  max-width: 80%;
  padding: 9px 13px;
  border-radius: 9px;
  font-size: 13.5px;
  line-height: 1.7;
}
.msg.me { justify-content: flex-end; }
.msg.me p { background: #95ec69; color: #111; border-top-right-radius: 3px; }
.msg.echo { justify-content: flex-start; }
.msg.echo p { background: #ffffff; color: #191919; border-top-left-radius: 3px; box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04); }

/* ============ 样例卡 ============ */

.voices2 { padding: clamp(2.5rem, 6vh, 4.5rem) 0; }

.section-head { text-align: center; margin-bottom: clamp(2rem, 4.5vh, 3rem); }
.section-head h2 {
  font-size: clamp(1.35rem, 2.5vw, 1.7rem);
  font-weight: 500;
  letter-spacing: 0.01em;
}
.section-head p {
  margin-top: 10px;
  color: var(--ink-dim);
  font-size: 14px;
  max-width: 34rem;
  margin-left: auto;
  margin-right: auto;
}

.cards2 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.vcard {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1.5rem 1.5rem 1.7rem;
  box-shadow: 0 6px 24px rgba(35, 38, 31, 0.04);
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.4s;
}
.vcard:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(35, 38, 31, 0.07); }

.vchip {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  color: var(--green-deep);
  background: var(--green-soft);
  border-radius: 999px;
  padding: 3px 11px;
  letter-spacing: 0.02em;
}

.vq { margin-top: 14px; color: var(--ink-faint); font-size: 13.5px; }
.va {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.85;
  padding-left: 13px;
  border-left: 2px solid var(--green);
}

/* ============ 长期记忆 ============ */

.memsec { padding: clamp(3rem, 8vh, 5.5rem) 0 clamp(1.5rem, 3vh, 2.5rem); }

.mem-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  max-width: 56rem;
  margin: 0 auto;
}

.mem-src { padding: 1.05rem 1.15rem; background: var(--green-mist); border: 1px solid rgba(10, 138, 72, 0.09); border-radius: var(--radius-md); }
.mem-src + .mem-src { margin-top: 10px; }
.mem-src h3 { font-size: 14.5px; font-weight: 500; color: var(--green-deep); }
.mem-src p { margin-top: 6px; font-size: 13.5px; line-height: 1.85; color: var(--ink-dim); }

.mem-panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.45rem 1.2rem;
  box-shadow: 0 6px 24px rgba(35, 38, 31, 0.04);
}
.mem-head {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ink-faint);
  padding-bottom: 0.75rem;
  border-bottom: 1px dashed rgba(35, 38, 31, 0.12);
}
.mem-item {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  padding: 0.78rem 0;
  border-bottom: 1px solid rgba(35, 38, 31, 0.05);
}
.mem-item:last-of-type { border-bottom: none; }
.mem-k {
  flex: none;
  width: 4.6em;
  box-sizing: border-box;
  text-align: center;
  font-size: 11.5px;
  color: var(--green-deep);
  background: var(--green-mist);
  border-radius: 99px;
  padding: 0.18rem 0.5rem;
}
.mem-item p { font-size: 13.5px; color: var(--ink); line-height: 1.7; }
.mem-foot {
  margin-top: 0.65rem;
  padding-top: 0.8rem;
  border-top: 1px dashed rgba(35, 38, 31, 0.12);
  font-size: 12.5px;
  color: var(--ink-faint);
  text-align: right;
}

@media (max-width: 760px) {
  .mem-grid { grid-template-columns: 1fr; gap: 1.8rem; }
}

/* ============ 内置玩法 ============ */

.plays { padding: clamp(2.5rem, 6vh, 4.5rem) 0 clamp(1rem, 2vh, 2rem); }

.remind-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: clamp(1.8rem, 4vw, 3.5rem);
  align-items: center;
  max-width: 52rem;
  margin: 0 auto;
}
.r-label { font-size: 12px; letter-spacing: 0.12em; color: var(--ink-faint); margin-bottom: 12px; }
.r-item {
  background: var(--green-soft);
  border-radius: 14px;
  padding: 0.72rem 1.05rem;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink);
}
.r-item + .r-item { margin-top: 9px; }
.r-note { margin-top: 12px; font-size: 12.5px; color: var(--ink-faint); }
.remind-card { max-width: 24rem; }

.plays-line + .remind-grid, .remind-grid + .plays-line { margin-top: clamp(2rem, 4.5vh, 3rem); }

@media (max-width: 760px) {
  .remind-grid { grid-template-columns: 1fr; gap: 1.6rem; }
  .remind-card { max-width: none; }
}

.plays-line {
  max-width: 34rem;
  margin-top: clamp(2rem, 4.5vh, 3rem);
  margin: 0 auto;
  text-align: center;
  font-size: 14.5px;
  line-height: 2.15;
  color: var(--ink-dim);
}
.plays-line span {
  display: inline-block;
  margin: 0 3px;
  padding: 1px 10px;
  font-size: 13px;
  color: var(--green-deep);
  background: var(--green-mist);
  border: 1px solid rgba(10, 138, 72, 0.1);
  border-radius: 999px;
}

/* ============ 为什么不一样 ============ */

.why { padding: clamp(2.5rem, 6vh, 4.5rem) 0 clamp(1.5rem, 3vh, 2.5rem); }

.why-rows { max-width: 40rem; margin: 0 auto; }

.why-row {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 10rem 1fr;
  gap: 18px;
  align-items: start;
}
.why-row:last-child { border-bottom: none; }
.why-row h3 { font-size: 15.5px; font-weight: 500; color: var(--ink); padding-top: 1px; }
.why-row p { font-size: 13.5px; color: var(--ink-dim); line-height: 1.85; }

@media (max-width: 560px) {
  .why-row { grid-template-columns: 1fr; gap: 6px; }
}

/* ============ 宣言 ============ */

.manifesto { padding: clamp(4rem, 8vh, 6rem) 0; text-align: center; }
.creed {
  font-size: clamp(1.3rem, 2.7vw, 1.8rem);
  font-weight: 400;
  line-height: 1.9;
  letter-spacing: 0.01em;
}

/* ============ 三步 ============ */

.steps { padding: clamp(2.5rem, 5vh, 4rem) 0 clamp(3.5rem, 7vh, 5rem); }

.steps-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.step-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: 0 6px 24px rgba(35, 38, 31, 0.04);
}

.step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--green-soft);
  color: var(--green-deep);
  font-family: var(--font-en);
  font-weight: 600;
  font-size: 13px;
}
.step-card h3 { margin-top: 14px; font-size: 15.5px; font-weight: 500; }
.step-card p { margin-top: 8px; color: var(--ink-dim); font-size: 13.5px; line-height: 1.8; }

.steps-cta { margin-top: clamp(2rem, 4.5vh, 3rem); text-align: center; }
.steps-note { margin-top: 10px; font-size: 12.5px; color: var(--ink-faint); }

/* ============ FAQ ============ */

.faq { padding: clamp(2.5rem, 5vh, 4rem) 0 clamp(3.5rem, 8vh, 6rem); }

.faq-list { max-width: 42rem; margin: 0 auto; }

.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 38px 18px 2px;
  font-size: 15px;
  font-weight: 500;
  position: relative;
  min-height: 44px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 4px; top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-en);
  font-weight: 300;
  font-size: 1.25rem;
  color: var(--ink-faint);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), color 0.3s;
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); color: var(--green); }
.faq-item p { padding: 0 2px 20px; color: var(--ink-dim); font-size: 13.5px; line-height: 1.85; max-width: 38rem; }

/* ============ FOOTER ============ */

.footer { padding-bottom: clamp(2rem, 4vh, 3rem); }

.footer-box {
  background: linear-gradient(150deg, var(--green-soft), var(--green-mist) 60%, var(--peach));
  border-radius: var(--radius-lg);
  text-align: center;
  padding: clamp(3rem, 7vh, 5rem) 28px;
}
.footer-line { font-size: clamp(1.4rem, 2.9vw, 2rem); font-weight: 500; letter-spacing: 0.02em; }
.footer-note { margin-top: 14px; font-size: 12.5px; color: var(--ink-faint); }
.footer-cta { margin-top: 24px; display: flex; justify-content: center; }

.footer-meta {
  margin-top: clamp(2rem, 4vh, 3rem);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  font-size: 12.5px;
  color: var(--ink-faint);
}
.footer-brand { color: var(--ink-dim); font-family: var(--font-en); font-weight: 500; }
.footer-brand i { font-style: normal; font-size: 11.5px; color: var(--ink-faint); margin-left: 4px; font-weight: 400; }
.footer-meta a:hover { color: var(--ink); }

/* ============ Toast ============ */

.toast {
  position: fixed;
  left: 50%; bottom: 32px;
  transform: translate(-50%, 20px);
  background: var(--ink);
  color: #fff;
  padding: 11px 22px;
  border-radius: 999px;
  font-size: 13.5px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, transform 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 90;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.16);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ============ Reveal ============ */

.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1); }
.reveal.in { opacity: 1; transform: none; }

/* ============ 响应式 ============ */

@media (max-width: 860px) {
  .steps-row { grid-template-columns: 1fr; }
  .cards2 { grid-template-columns: 1fr; max-width: 30rem; margin: 0 auto; }
}

@media (max-width: 560px) {
  .wrap { padding: 0 20px; }
  .hero { padding-top: 6rem; }
  .hero-ctas { flex-direction: column; align-items: stretch; }
  .hero-ctas .btn { width: 100%; min-height: 46px; }
  .br-desktop { display: none; }
  .stage { padding: 1.4rem; }
  .nav-inner { padding: 11px 20px; }
  .footer-meta { flex-wrap: wrap; gap: 8px 12px; }
}

@media (hover: none) and (pointer: coarse) {
  .btn-desktop-only { display: none; }
  .btn-mobile-only { display: inline-flex; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .face-star, .face-wink, .face-wink .eye-closed, .face-wink .eye-peek { animation: none; }
  .face-wink { opacity: 0; }
  * { transition-duration: 0.01ms !important; }
}