/* ==========================================================================
   solimake — marketing homepage
   设计稿基准宽 1920px；用 vw + clamp 等比缩放，1920 下与稿一致。
   标题：Roboto Condensed（800）；正文：Inter。
   ========================================================================== */

@font-face {
  font-family: 'Roboto Condensed';
  src: url('../fonts/roboto-condensed-var.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122,
    U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Inter';
  src: url('../fonts/inter-var.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+2074, U+20AC, U+2122,
    U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  --cream: #f6f1e8;
  --ink: #000000;
  --muted: #6f6b64;
  --green: #8cff79;
  --purple: #8e80ff;
  --lavender: #ded9ff;
  --coral: #ff826a;
  --line: #e4ded4;

  --nav-h: clamp(60px, 6.78vw, 130px);

  --f-display: 'Roboto Condensed', 'Inter', -apple-system, BlinkMacSystemFont,
    'Segoe UI', 'PingFang SC', 'Microsoft YaHei', Helvetica, Arial, sans-serif;
  --f-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Microsoft YaHei', Helvetica, Arial, sans-serif;

  --fs-h1: clamp(42px, 6.15vw, 118px);
  --fs-h2: clamp(28px, 4.27vw, 82px);
  --fs-h3: clamp(20px, 2.6vw, 50px);
  --fs-lead: clamp(15px, 1.46vw, 28px);
  --fs-body: clamp(14px, 1.35vw, 26px);
  --fs-btn: clamp(14px, 1.25vw, 24px);
  --fs-nav: clamp(14px, 1.25vw, 24px);
  --fs-navlink: clamp(15px, 1.46vw, 28px);
  --fs-kicker: clamp(13px, 1.25vw, 24px);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
h1, h2, h3, p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.wrap {
  max-width: 1920px;
  margin-inline: auto;
  padding-inline: clamp(20px, 7.03vw, 135px);
}

/* ---------------------------------------------------------------- buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--f-body);
  font-weight: 700;
  font-size: var(--fs-btn);
  line-height: 1;
  letter-spacing: -0.005em;
  border-radius: 999px;
  border: 0;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.18s ease, background-color 0.18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--dark {
  background: #050505;
  color: #fff;
  padding: 0.85em 2.9em;
}
.btn--dark:hover { background: #1b1b1b; }

.btn--green {
  background: var(--green);
  color: #050505;
  border: 2px solid #050505;
  padding: 0.85em 2.4em;
}

.btn--sm { padding: 0.8em 2.2em; }

/* ------------------------------------------------------------------- pill */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  background: #fff;
  border-radius: 999px;
  font-family: var(--f-body);
  font-weight: 600;
  font-size: var(--fs-nav);
  letter-spacing: 0.005em;
  line-height: 1;
  padding: 0.85em 1.35em;
  box-shadow: 0 2px 10px rgba(40, 32, 20, 0.05);
}

.section__kicker {
  font-size: var(--fs-kicker);
  padding: 0.48em 1.1em;
}

/* -------------------------------------------------------------------- nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(245, 244, 243, 0.9);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.nav__inner {
  max-width: 1920px;
  margin-inline: auto;
  height: var(--nav-h);
  padding-inline: clamp(18px, 4.4vw, 84px);
  display: flex;
  align-items: center;
}

.nav__logo img { height: clamp(20px, 1.93vw, 37px); width: auto; }

.nav__links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: clamp(16px, 2.55vw, 49px);
}

.nav__links a {
  font-family: var(--f-display);
  font-family: var(--f-body);
  font-size: var(--fs-navlink);
  font-weight: 600;
  letter-spacing: -0.005em;
  color: #111;
  position: relative;
  padding-block: 6px;
}
.nav__links a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--purple);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.nav__links a:hover::after,
.nav__links a.is-active::after { transform: scaleX(1); }

.nav__cta {
  margin-left: clamp(18px, 3.6vw, 69px);
  font-size: clamp(14px, 1.35vw, 26px);
  padding: 0.7em 2.3em;
}

.nav__burger {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.16);
  background: transparent;
  cursor: pointer;
  position: relative;
}
.nav__burger span {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 1.5px;
  background: #111;
  transition: transform 0.25s ease;
}
.nav__burger span:nth-child(1) { top: 18px; }
.nav__burger span:nth-child(2) { top: 25px; }
.nav__burger[aria-expanded='true'] span:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
.nav__burger[aria-expanded='true'] span:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

/* ------------------------------------------------------------------- hero */
.hero {
  position: relative;
  padding-top: clamp(26px, 3.39vw, 65px);
  padding-bottom: clamp(30px, 2.34vw, 45px);
  overflow: hidden;
  background:
    radial-gradient(58vw 42vw at 92% 4%, #ded7e6 0%, rgba(222, 215, 230, 0) 62%),
    radial-gradient(42vw 34vw at 58% -8%, #ece7e3 0%, rgba(236, 231, 227, 0) 60%),
    radial-gradient(38vw 30vw at 2% 88%, rgba(140, 255, 121, 0.22) 0%, rgba(140, 255, 121, 0) 65%),
    var(--cream);
}

.hero__grid {
  display: grid;
  grid-template-columns: 0.78fr 1fr;
  gap: clamp(30px, 7.03vw, 135px);
  align-items: start;
}

.hero__copy { padding-top: clamp(0px, 1.7vw, 33px); }

.hero__badge {
  font-size: clamp(12px, 1.15vw, 22px);
  padding: 0.18em 1.35em 0.18em 0.18em;
  gap: 0.7em;
  height: clamp(30px, 2.29vw, 44px);
}

.hero__badge-mark {
  width: 1.8em;
  height: 1.8em;
  border-radius: 50%;
  background: var(--purple);
  color: #fff;
  display: grid;
  place-items: center;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 0.95em;
  line-height: 1;
  padding-bottom: 0.1em;
}

.hero__title {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: var(--fs-h1);
  line-height: 0.86;
  letter-spacing: -0.03em;
  margin-top: clamp(18px, 2.08vw, 40px);
}

.hero__line { display: block; }

.hl {
  display: inline-block;
  background: var(--green);
  border-radius: 0.14em;
  padding: 0.16em 0.06em 0.2em;
  margin-left: 0.02em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.hero__sub {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: var(--fs-h3);
  letter-spacing: -0.015em;
  line-height: 1.05;
  margin-top: clamp(26px, 2.92vw, 56px);
}

.hero__lead {
  font-size: var(--fs-lead);
  line-height: 1.45;
  letter-spacing: -0.005em;
  max-width: 25em;
  margin-top: clamp(14px, 2.08vw, 40px);
}

.hero__btn {
  margin-top: clamp(22px, 2.34vw, 45px);
  font-size: clamp(15px, 1.46vw, 28px);
  padding: 0.9em 2.5em;
}

/* ------------------------------------------------------------- brief card */
.brief-card {
  background: #fff;
  border-radius: clamp(18px, 1.56vw, 30px);
  padding: clamp(16px, 2.19vw, 42px) clamp(16px, 2.08vw, 40px)
    clamp(12px, 1.04vw, 20px);
  box-shadow: 0 24px 70px rgba(58, 46, 80, 0.09);
}

.brief-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brief-card__label {
  font-family: var(--f-body);
  font-weight: 700;
  font-size: clamp(13px, 1.15vw, 22px);
  letter-spacing: 0;
}

.brief-card__state {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--f-body);
  font-weight: 700;
  font-size: clamp(12px, 1.04vw, 20px);
  letter-spacing: 0;
}

.dot {
  width: 0.72em;
  height: 0.72em;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.05);
}

.brief-card__field {
  margin-top: clamp(12px, 1.8vw, 34px);
  border: 1px solid #e6e1d9;
  border-radius: clamp(10px, 0.83vw, 16px);
  background: #fdfcfa;
  padding: clamp(12px, 1.67vw, 32px);
}

.brief-card__textarea {
  width: 100%;
  height: clamp(100px, 7.8vw, 150px);
  border: 0;
  background: transparent;
  resize: vertical;
  outline: none;
  color: #111;
  font-family: var(--f-body);
  font-size: clamp(13px, 1.25vw, 24px);
  line-height: 1.45;
  letter-spacing: -0.005em;
}

.brief-card__row {
  margin-top: clamp(10px, 1.8vw, 34px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brief-card__upload {
  color: #8d8880;
  font-size: clamp(12px, 1.15vw, 22px);
  font-weight: 500;
  letter-spacing: -0.005em;
}

.brief-card__row .btn { flex: none; }

.brief-card__chips {
  margin-top: clamp(12px, 1.35vw, 26px);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(8px, 1.04vw, 20px) clamp(10px, 1.15vw, 22px);
}

.brief-card__chips li {
  background: #070707;
  color: #fff;
  border-radius: 999px;
  height: clamp(34px, 3.44vw, 66px);
  display: grid;
  place-items: center;
  font-family: var(--f-body);
  font-weight: 700;
  font-size: clamp(11px, 1.15vw, 22px);
  letter-spacing: -0.005em;
  text-align: center;
  padding-inline: 8px;
}

/* ------------------------------------------------------------------ strip */
.strip {
  height: clamp(46px, 4.69vw, 90px);
  display: flex;
  align-items: center;
  border-block: 1px solid rgba(0, 0, 0, 0.07);
  background: linear-gradient(
    90deg,
    rgba(160, 255, 148, 0.32) 0%,
    rgba(246, 241, 232, 0.45) 32%,
    rgba(226, 220, 233, 0.55) 100%
  );
}

.strip__inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(12px, 2.6vw, 50px);
  width: 100%;
  font-family: var(--f-body);
  font-weight: 700;
  font-size: clamp(11px, 1.1vw, 21px);
  letter-spacing: 0;
  text-align: center;
}

.strip__arrow {
  width: clamp(14px, 1.25vw, 24px);
  height: auto;
  flex: none;
  opacity: 0.85;
}

/* --------------------------------------------------------------- sections */
.section { position: relative; }

.section__title {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: var(--fs-h2);
  line-height: 0.8;
  letter-spacing: -0.025em;
  margin-top: clamp(18px, 2.19vw, 42px);
  max-width: 18em;
}

.section__lead {
  font-size: var(--fs-lead);
  line-height: 1.45;
  letter-spacing: -0.005em;
  max-width: 40em;
  margin-top: clamp(14px, 2.08vw, 40px);
}

.section__lead--narrow { max-width: 38em; }

/* -------------------------------------------------------------------- why */
.why {
  padding-top: clamp(48px, 8.44vw, 162px);
  background:
    radial-gradient(46vw 40vw at -4% 2%, rgba(140, 255, 121, 0.22) 0%, rgba(140, 255, 121, 0) 62%),
    var(--cream);
}

.why__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(14px, 2.19vw, 42px);
  margin-top: clamp(34px, 3.9vw, 75px);
}

.why-card {
  border-radius: clamp(16px, 1.3vw, 25px);
  padding: clamp(22px, 3.13vw, 60px) clamp(22px, 3.13vw, 60px) clamp(20px, 2.3vw, 44px);
  min-height: clamp(230px, 24vw, 461px);
  display: flex;
  flex-direction: column;
}

.why-card--white { background: #fff; border: 1px solid #e8e2d8; }
.why-card--green { background: var(--green); }
.why-card--lavender { background: var(--lavender); }

.why-card__title {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(24px, 2.92vw, 56px);
  line-height: 0.8;
  letter-spacing: -0.02em;
  max-width: 8ch;
}

.why-card__body {
  margin-top: clamp(24px, 3.65vw, 70px);
  font-size: clamp(14px, 1.35vw, 26px);
  line-height: 1.54;
  letter-spacing: -0.005em;
  max-width: 16em;
}

/* -------------------------------------------------------------------- how */
.how { padding-top: clamp(48px, 8.23vw, 158px); }

.steps { margin-top: clamp(26px, 3.02vw, 58px); }

.step {
  position: relative;
  background: #fff;
  border-radius: clamp(16px, 1.56vw, 30px);
  min-height: clamp(96px, 8.9vw, 171px);
  display: flex;
  align-items: center;
  padding: clamp(16px, 2.08vw, 40px) clamp(16px, 2.9vw, 56px) clamp(16px, 2.08vw, 40px)
    clamp(46px, 6.25vw, 120px);
  margin-bottom: clamp(14px, 2.14vw, 41px);
}

.step:last-child { margin-bottom: 0; }

.step__num {
  position: absolute;
  left: calc(-1 * clamp(12px, 1.8vw, 35px));
  top: 50%;
  transform: translateY(-50%);
  width: clamp(38px, 3.44vw, 66px);
  height: clamp(38px, 3.44vw, 66px);
  border-radius: 50%;
  background: var(--purple);
  color: #fff;
  display: grid;
  place-items: center;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(14px, 1.25vw, 24px);
  box-shadow: 0 6px 18px rgba(90, 70, 220, 0.25);
}

.step__inner {
  display: grid;
  grid-template-columns: minmax(0, 430px) 1fr;
  gap: clamp(12px, 2.08vw, 40px);
  align-items: center;
  width: 100%;
}

.step__title {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(20px, 2.92vw, 56px);
  line-height: 0.8;
  letter-spacing: -0.02em;
}

.step__body {
  font-size: var(--fs-body);
  line-height: 1.5;
  letter-spacing: -0.005em;
  max-width: 40em;
}

/* --------------------------------------------------------------- features */
.features { padding-top: clamp(48px, 9.11vw, 175px); }

.feat-band {
  margin-top: clamp(28px, 3.65vw, 70px);
  padding-block: clamp(30px, 4.95vw, 95px);
  border-block: 1px solid rgba(0, 0, 0, 0.055);
  background:
    radial-gradient(40vw 34vw at 6% 102%, rgba(140, 255, 121, 0.16) 0%, rgba(140, 255, 121, 0) 62%),
    radial-gradient(50vw 44vw at 100% 2%, rgba(222, 217, 255, 0.5) 0%, rgba(222, 217, 255, 0) 60%),
    #f7f2ea;
}

#feat-carousel { position: relative; }

/* 设计稿里圆点对齐图片底边，不额外撑高色带 */
#feat-dots {
  position: absolute;
  left: 0;
  bottom: clamp(-10px, -0.4vw, 0px);
  margin-top: 0;
}

/* ------------------------------------------------------- carousel (共用) */
.carousel__viewport { overflow: hidden; clip-path: inset(0 0.5px 0 0); }

.carousel__track {
  display: flex;
  transition: transform 0.65s cubic-bezier(0.22, 0.61, 0.36, 1);
  will-change: transform;
}

.feat-slide {
  flex: 0 0 100%;
  min-width: 0;
  overflow: hidden;
  display: grid;
  grid-template-columns: 0.78fr 1fr;
  gap: clamp(28px, 6.72vw, 129px);
  align-items: center;
  min-height: clamp(300px, 27.6vw, 530px);
}

.feat-slide__title {
  font-family: var(--f-body);
  font-weight: 800;
  font-size: clamp(30px, 4.48vw, 86px);
  line-height: 0.872;
  letter-spacing: -0.03em;
}

/* 设计稿里轮播大标题的高亮块：贴合字身上下、整行不因此变高 */
.feat-slide__title .hl {
  display: inline-block;
  line-height: 1;
  padding: 0.02em 0.08em 0.14em;
  margin-block: -0.2em;
  position: relative;
  top: 0.12em;
  background: var(--green);
  border-radius: 0.14em;
}

.hl--sm {
  padding: 0.24em 0.07em 0.26em;
  line-height: 1;
  vertical-align: baseline;
}

.feat-slide__body {
  margin-top: clamp(18px, 3.02vw, 58px);
  font-size: var(--fs-lead);
  line-height: 1.45;
  letter-spacing: -0.005em;
  max-width: 23em;
}

.feat-slide__btn { margin-top: clamp(20px, 3.13vw, 60px); font-size: clamp(15px, 1.35vw, 26px); padding: 0.77em 2.4em; }

.feat-slide__media { display: flex; justify-content: flex-end; }

.feat-slide__media img {
  width: 100%;
  max-width: clamp(300px, 44.6vw, 856px);
  height: auto;
}

/* 占位（后续素材从这里替换） */
.is-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
}

.placeholder-box {
  width: 100%;
  min-height: clamp(240px, 27.6vw, 530px);
  border: 1.5px dashed rgba(0, 0, 0, 0.16);
  border-radius: clamp(14px, 1.3vw, 25px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(10px, 1vw, 18px);
  color: #8d877e;
  background: rgba(255, 255, 255, 0.35);
}

.placeholder-box__no {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(18px, 1.8vw, 34px);
  opacity: 0.55;
}

.placeholder-box__text { font-size: clamp(13px, 1.05vw, 20px); }

/* dots */
.dots {
  display: flex;
  align-items: center;
  gap: clamp(8px, 0.65vw, 13px);
  margin-top: clamp(16px, 1.8vw, 34px);
}

.dots__btn {
  width: clamp(12px, 1.05vw, 20px);
  height: clamp(12px, 1.05vw, 20px);
  padding: 0;
  border-radius: 50%;
  border: 1.5px solid rgba(0, 0, 0, 0.22);
  background: transparent;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.dots__btn.is-active {
  background: var(--green);
  border-color: var(--green);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.05);
}

.dots__btn:hover { transform: scale(1.12); }

/* -------------------------------------------------------------- use cases */
.usecases { padding-top: clamp(48px, 8.33vw, 160px); }

.carousel--cases { margin-top: clamp(24px, 3.13vw, 60px); }

.carousel--cases .dots { margin-top: clamp(6px, 0.5vw, 10px); }

.case-slide {
  flex: 0 0 100%;
  min-width: 0;
  overflow: hidden;
  display: grid;
  grid-template-columns: minmax(0, 702px) 1fr;
  gap: clamp(24px, 4.2vw, 80px);
  align-items: center;
  min-height: clamp(300px, 26vw, 500px);
}

.case-card {
  background: var(--coral);
  border-radius: clamp(16px, 1.3vw, 25px);
  padding: clamp(22px, 3.13vw, 60px);
  min-height: clamp(240px, 26.3vw, 505px);
  display: flex;
  flex-direction: column;
}

.case-card--lavender { background: var(--lavender); }
.case-card--green { background: var(--green); }

.case-card__eyebrow {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(12px, 1.56vw, 30px);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.case-card__title {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(24px, 3.65vw, 70px);
  line-height: 0.98;
  letter-spacing: -0.02em;
  margin-top: clamp(12px, 1.35vw, 26px);
  max-width: none;
}

.case-card__body {
  margin-top: clamp(24px, 3.4vw, 65px);
  font-size: clamp(14px, 1.35vw, 26px);
  line-height: 1.5;
  letter-spacing: -0.005em;
  max-width: 20em;
}

.case-slide__art { display: flex; justify-content: center; }

.case-slide__art img {
  width: 100%;
  max-width: clamp(280px, 34.6vw, 664px);
  height: auto;
}

.placeholder-box--case { min-height: clamp(240px, 23.2vw, 446px); }

/* -------------------------------------------------------------------- faq */
.faq { padding-top: clamp(48px, 8.85vw, 170px); }

.faq__list {
  margin-top: clamp(20px, 3.65vw, 70px);
  border-top: 1px solid rgba(0, 0, 0, 0.14);
}

.faq__item { border-bottom: 1px solid rgba(0, 0, 0, 0.14); }

.faq__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: clamp(16px, 2vw, 40px);
  padding: clamp(18px, 1.85vw, 35px) 0;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--f-body);
  font-weight: 600;
  font-size: clamp(15px, 1.35vw, 26px);
  letter-spacing: -0.015em;
  line-height: 1.35;
}

.faq__plus {
  width: clamp(18px, 1.25vw, 24px);
  height: auto;
  flex: none;
  transition: transform 0.28s ease;
}

.faq__item.is-open .faq__plus { transform: rotate(45deg); }

.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.36s ease;
}

.faq__a p {
  padding-bottom: clamp(14px, 1.8vw, 34px);
  max-width: 48em;
  color: #4d4842;
  font-size: clamp(13px, 1.15vw, 22px);
  line-height: 1.6;
  letter-spacing: -0.005em;
}

/* -------------------------------------------------------------------- cta */
.cta-section { padding-block: clamp(40px, 6.25vw, 120px); }

.cta {
  background: var(--purple);
  border-radius: clamp(20px, 1.67vw, 32px);
  padding: clamp(40px, 5.3vw, 102px) clamp(18px, 4.15vw, 80px)
    clamp(30px, 4.7vw, 90px);
  text-align: center;
}

.cta__title {
  font-family: var(--f-body);
  font-weight: 800;
  font-size: clamp(30px, 5.21vw, 100px);
  line-height: 0.94;
  letter-spacing: -0.03em;
}

.cta__lead {
  margin-top: clamp(16px, 2vw, 38px);
  font-size: var(--fs-lead);
  line-height: 1.45;
  letter-spacing: -0.005em;
}

.cta__btn { margin-top: clamp(22px, 3.1vw, 60px); font-size: clamp(14px, 1.25vw, 24px); padding: 0.79em 2.9em; }

.cta__note {
  margin-top: clamp(16px, 2.4vw, 46px);
  font-size: clamp(13px, 1.25vw, 24px);
  color: rgba(0, 0, 0, 0.78);
  letter-spacing: -0.005em;
}

/* ----------------------------------------------------------------- footer */
.footer {
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  padding-top: clamp(46px, 6.2vw, 118px);
}

.footer .wrap { padding-inline: clamp(18px, 4.4vw, 84px); }

.footer__top {
  display: grid;
  grid-template-columns: 47% 12.5% 9% 10%;
  column-gap: clamp(24px, 6.5vw, 125px);
}

.footer__brand img { height: clamp(20px, 1.93vw, 37px); width: auto; }

.footer__tagline {
  margin-top: clamp(20px, 2.4vw, 46px);
  font-size: clamp(14px, 1.36vw, 26px);
  line-height: 1.7;
  letter-spacing: -0.005em;
  max-width: 22em;
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.9vw, 36px);
  padding-top: clamp(4px, 0.6vw, 11px);
}

.footer__col a {
  font-family: var(--f-body);
  font-weight: 700;
  font-size: clamp(14px, 1.51vw, 29px);
  letter-spacing: 0;
  width: fit-content;
}
.footer__col a:hover { text-decoration: underline; text-underline-offset: 4px; }

.footer__bottom {
  margin-top: clamp(40px, 14vw, 270px);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  padding-block: clamp(18px, 1.6vw, 30px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: clamp(12px, 1.04vw, 20px);
  color: #2f2b26;
  letter-spacing: 0.01em;
}

/* ------------------------------------------------------------ responsive */
@media (max-width: 1180px) {
  .step__inner { grid-template-columns: minmax(0, 360px) 1fr; }
}

@media (max-width: 1024px) {
  .hero__grid { grid-template-columns: 1fr; gap: clamp(28px, 5vw, 46px); }
  .hero__lead { max-width: 30em; }
  .feat-slide { grid-template-columns: 1fr; gap: 28px; }
  .feat-slide__media { justify-content: flex-start; }
  .feat-slide__media img {
    max-width: min(100%, 560px);
    /* 单列时设计稿的右侧裁切会显得突兀，用渐隐收尾 */
    -webkit-mask-image: linear-gradient(90deg, #000 78%, rgba(0, 0, 0, 0) 100%);
    mask-image: linear-gradient(90deg, #000 78%, rgba(0, 0, 0, 0) 100%);
  }
  #feat-dots { position: static; margin-top: 24px; }
  .case-slide { grid-template-columns: 1fr; }
  .case-slide__art { order: -1; }
  .case-slide__art img { max-width: min(100%, 420px); }
  .why__grid { grid-template-columns: 1fr; }
  .why-card { min-height: 0; }
  .why-card__body { margin-top: 28px; }
  .step__inner { grid-template-columns: 1fr; gap: 12px; }
  .step { padding-left: clamp(46px, 8vw, 80px); }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
  .nav__links {
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    margin: 0;
    padding: 18px clamp(18px, 4.4vw, 84px) 22px;
    background: rgba(246, 241, 232, 0.98);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { padding-block: 12px; font-size: 18px; }
  .nav__burger { display: block; }
  .nav__cta { margin-left: auto; margin-right: 14px; padding: 0.85em 1.8em; }
}

@media (max-width: 720px) {
  .brief-card__chips { grid-template-columns: 1fr; }
  .brief-card__row { flex-direction: column; align-items: stretch; }
  .brief-card__row .btn { width: 100%; }
  .brief-card__upload { text-align: center; }
  .strip__inner { gap: 8px; font-size: 10px; }
  .strip__arrow { width: 12px; }
  .footer__top { grid-template-columns: 1fr 1fr; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .cta__title br { display: none; }
  .section__title br { display: none; }
  .br-lg { display: none; }
  .step__num { position: static; transform: none; margin-right: 12px; }
  .step { flex-direction: row; align-items: flex-start; gap: 0; padding-left: 18px; }
  .step__inner { padding-top: 2px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .carousel__track, .faq__a, .btn, .faq__plus { transition: none; }
}

/* 设计稿整体按 80% 呈现：内容宽度、字号、间距等比缩小，两侧留白随之变宽。
   只作用于桌面；≤1024 保持原响应式尺寸（否则手机字号会过小）。 */
@media (min-width: 1025px) {
  html {
    scroll-padding-top: calc(var(--nav-h) * 0.8 + 20px);
  }
  body {
    zoom: 0.8;
  }
}