:root {
  color-scheme: light;
  --blue: #1257d6;
  --blue-dark: #0b3e9f;
  --blue-soft: #eaf2ff;
  --orange: #f04b16;
  --orange-dark: #ca3510;
  --ink: #111827;
  --muted: #596579;
  --line: #dbe5f4;
  --surface: #ffffff;
  --page: #f7faff;
  --radius: 20px;
  --shadow: 0 18px 50px rgba(18, 87, 214, 0.12);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  background: var(--page);
  color: var(--ink);
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: clip;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--page);
  overflow-x: clip;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 99;
  transform: translateY(-160%);
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--ink);
  color: white;
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid #ffb28f;
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  padding: 12px 20px;
  border-bottom: 1px solid rgba(18, 87, 214, 0.12);
  background: rgba(247, 250, 255, 0.96);
  backdrop-filter: blur(14px);
}

.service-name {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.service-kicker {
  color: var(--blue);
  font-size: 15px;
  font-weight: 800;
}

.service-note {
  color: var(--muted);
  font-size: 11px;
}

.header-cta,
.button,
.text-action,
.mobile-bar button {
  min-height: 48px;
  border: 0;
  border-radius: 12px;
  font-weight: 800;
}

.header-cta {
  padding: 0 18px;
  background: var(--orange);
  color: white;
}

.hero {
  display: grid;
  gap: 30px;
  padding: 44px 20px 54px;
  background: var(--surface);
}

.hero-copy {
  max-width: 720px;
}

.assurance {
  display: inline-flex;
  margin: 0 0 26px;
  padding: 10px 14px;
  border: 1px solid #aac7ff;
  border-radius: 999px;
  background: var(--blue-soft);
  color: var(--blue-dark);
  font-size: 14px;
  font-weight: 800;
}

.hero h1 {
  margin: 0;
  font-family: "Songti SC", "STSong", serif;
  font-size: clamp(40px, 10.8vw, 68px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.055em;
}

.delivery-line {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 26px 0;
  color: #323c4e;
  font-size: 17px;
  font-weight: 700;
}

.delivery-line span {
  width: 36px;
  height: 4px;
  border-radius: 99px;
  background: var(--orange);
}

.price-rail {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 28px 0 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.price-rail article {
  display: grid;
  gap: 7px;
  min-width: 0;
  padding: 18px 8px;
  text-align: center;
}

.price-rail article + article {
  border-left: 1px solid var(--line);
}

.price-rail span {
  color: #25324a;
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.price-rail strong {
  color: var(--orange);
  font-size: clamp(26px, 8vw, 38px);
  line-height: 1;
}

.price-rail small,
.package-top small {
  font-size: 0.55em;
}

.hero-actions {
  display: grid;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  background: var(--orange);
  color: white;
}

.button.primary:hover,
.header-cta:hover {
  background: var(--orange-dark);
}

.button.secondary {
  border: 2px solid var(--blue);
  background: white;
  color: var(--blue);
}

.micro-proof {
  margin: 16px 0 0;
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.hero-side {
  padding: 24px;
  border-radius: var(--radius);
  background: var(--blue);
  color: white;
}

.side-label {
  margin: 0 0 22px;
  color: #cfe0ff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.hero-side ol {
  display: grid;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-side li {
  display: grid;
  grid-template-columns: 34px 1fr;
  column-gap: 12px;
  align-items: start;
}

.hero-side li span {
  grid-row: 1 / 3;
  color: #ffb294;
  font-weight: 900;
}

.hero-side b {
  font-size: 18px;
}

.hero-side small {
  margin-top: 4px;
  color: #dce8ff;
  line-height: 1.6;
}

.section-shell {
  padding: 68px 20px;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 30px;
}

.section-heading > p,
.brief-intro > p {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-heading h2,
.brief-intro h2,
.closing-cta h2 {
  margin: 0;
  font-size: clamp(28px, 8.5vw, 46px);
  line-height: 1.22;
  letter-spacing: -0.035em;
}

.section-heading > span,
.brief-intro > span {
  display: block;
  margin-top: 14px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

.cases {
  background: #edf4ff;
}

.case-grid {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 78%;
  gap: 14px;
  overflow-x: auto;
  padding: 4px 20px 16px 0;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
}

.case-card {
  min-width: 0;
  border: 1px solid #c7d8f5;
  border-radius: 14px;
  background: white;
  overflow: hidden;
  box-shadow: 0 10px 28px rgba(18, 87, 214, 0.08);
  scroll-snap-align: start;
}

.case-card a {
  display: block;
  height: 100%;
}

.case-poster {
  --case-overlay: linear-gradient(180deg, rgba(18, 15, 12, 0.05) 12%, rgba(18, 15, 12, 0.92) 86%);
  position: relative;
  display: flex;
  min-height: 430px;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  padding: 26px;
  background: #302b27;
  color: white;
}

.case-poster::after {
  position: absolute;
  z-index: 1;
  inset: 0;
  background: var(--case-overlay);
  content: "";
  pointer-events: none;
}

.case-poster > * {
  z-index: 2;
}

.case-poster__image {
  position: absolute;
  z-index: 0;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0;
  transition: opacity 220ms ease;
}

.case-poster__image.is-loaded {
  opacity: 1;
}

.case-poster--beauty {
  --case-overlay: linear-gradient(180deg, rgba(73, 20, 42, 0.08) 12%, rgba(65, 19, 38, 0.9) 86%);
  background: #6e4353;
}

.case-poster--fashion {
  background: #3b342d;
}

.case-poster--fashion .case-poster__image {
  object-position: 54% center;
}

.case-poster--tutoring {
  --case-overlay: linear-gradient(180deg, rgba(10, 47, 116, 0.08) 12%, rgba(9, 46, 112, 0.94) 86%);
  background: #315b9d;
}

.case-demo {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 7px 10px;
  border: 1px solid rgba(255, 255, 255, 0.62);
  border-radius: 999px;
  background: rgba(10, 19, 36, 0.42);
  color: white;
  font-size: 11px;
  font-weight: 800;
  backdrop-filter: blur(8px);
}

.case-package {
  position: absolute;
  top: 18px;
  left: 18px;
  max-width: calc(100% - 150px);
  padding: 7px 10px;
  border-radius: 999px;
  background: #fff;
  color: #14213d;
  font-size: 11px;
  font-weight: 900;
}

.case-poster p {
  margin: 0 0 8px;
  color: #ffd4c3;
  font-size: 13px;
  font-weight: 900;
}

.case-poster h3 {
  margin: 0;
  font-size: clamp(32px, 9vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.case-poster b {
  margin-top: 12px;
  font-size: 12px;
  line-height: 1.6;
}

.case-poster strong {
  align-self: flex-start;
  margin-top: 20px;
  padding: 11px 14px;
  border-radius: 10px;
  background: var(--orange);
  color: white;
  font-size: 13px;
}

.reuse-value {
  display: grid;
  gap: 28px;
  background: #fff1e9;
}

.reuse-copy {
  max-width: 760px;
}

.reuse-copy > p {
  margin: 0 0 10px;
  color: var(--orange-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.reuse-copy h2 {
  margin: 0;
  font-size: clamp(30px, 8.5vw, 48px);
  line-height: 1.18;
  letter-spacing: -0.04em;
}

.reuse-copy > span {
  display: block;
  margin-top: 18px;
  color: #623728;
  font-size: 16px;
  line-height: 1.85;
}

.reuse-channels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.reuse-channels span {
  padding: 14px 12px;
  border: 1px solid #f1b79f;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
  color: #7b321b;
  font-size: 13px;
  font-weight: 800;
  text-align: center;
}

.package-grid {
  display: grid;
  gap: 18px;
}

.package-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: white;
  box-shadow: 0 16px 38px rgba(26, 66, 130, 0.08);
}

.package-card.featured {
  border: 2px solid var(--blue);
}

.package-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.package-top span {
  padding: 7px 10px;
  border-radius: 8px;
  background: var(--blue-soft);
  color: var(--blue-dark);
  font-size: 12px;
  font-weight: 800;
}

.package-top strong {
  color: var(--orange);
  font-size: 32px;
}

.package-card h3 {
  margin: 24px 0 10px;
  font-size: 26px;
}

.package-card > p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.package-card ul,
.boundary ul {
  display: grid;
  gap: 11px;
  margin: 22px 0;
  padding-left: 20px;
  color: #303c52;
  line-height: 1.5;
}

.text-action {
  width: 100%;
  border: 1px solid #aec7f3;
  background: var(--blue-soft);
  color: var(--blue);
}

.package-note {
  margin: 22px 0 0;
  padding: 16px;
  border-left: 4px solid var(--orange);
  background: #fff3ed;
  color: #74331c;
  line-height: 1.65;
}

.value {
  background: var(--blue);
  color: white;
}

.value .section-heading > p {
  color: #ffd0bd;
}

.value-list {
  display: grid;
  gap: 18px;
}

.value-list article {
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
}

.value-list span {
  color: #ffb294;
  font-size: 13px;
  font-weight: 900;
}

.value-list h3 {
  margin: 12px 0 8px;
  font-size: 24px;
}

.value-list p {
  margin: 0;
  color: #dce8ff;
  line-height: 1.7;
}

.value-list b {
  display: block;
  margin-top: 18px;
  color: #ffceb9;
  font-size: 14px;
  line-height: 1.6;
}

.process-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-list li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}

.process-list span {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--orange);
  color: white;
  font-weight: 900;
}

.process-list b {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.process-list p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.boundaries {
  background: #edf4ff;
}

.boundary-grid {
  display: grid;
  gap: 16px;
}

.boundary {
  padding: 24px;
  border-radius: var(--radius);
  background: white;
}

.boundary.yes {
  border-top: 5px solid var(--blue);
}

.boundary.no {
  border-top: 5px solid #7b8799;
}

.boundary h3 {
  margin: 0;
  font-size: 22px;
}

.brief-section {
  display: grid;
  gap: 32px;
  background: white;
}

.brief-form {
  display: grid;
  gap: 18px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--page);
  box-shadow: var(--shadow);
}

.field {
  display: grid;
  gap: 8px;
}

.field label {
  color: #24324a;
  font-weight: 800;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 50px;
  border: 1px solid #b9c9df;
  border-radius: 12px;
  background: white;
  color: var(--ink);
  padding: 12px 14px;
}

.field textarea {
  resize: vertical;
}

.field small {
  min-height: 18px;
  color: #bb2f0b;
}

.field.has-error input,
.field.has-error select,
.field.has-error textarea {
  border-color: #d83f19;
  background: #fff7f4;
}

.submit-button {
  width: 100%;
}

.form-status {
  min-height: 24px;
  margin: 0;
  color: var(--blue-dark);
  font-weight: 700;
  line-height: 1.6;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq details {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: white;
}

.faq summary {
  min-height: 56px;
  padding: 17px 48px 17px 18px;
  font-weight: 800;
  cursor: pointer;
}

.faq details p {
  margin: 0;
  padding: 0 18px 18px;
  color: var(--muted);
  line-height: 1.75;
}

.closing-cta {
  padding: 58px 20px 90px;
  background: var(--orange);
  color: white;
  text-align: center;
}

.closing-cta > p {
  margin: 0 0 10px;
  font-weight: 800;
}

.closing-cta > div {
  display: grid;
  gap: 12px;
  max-width: 460px;
  margin: 26px auto 0;
}

.button.light {
  background: white;
  color: var(--orange-dark);
}

.button.ghost {
  border: 2px solid white;
  background: transparent;
  color: white;
}

footer {
  display: grid;
  gap: 6px;
  padding: 28px 20px 110px;
  background: #0b1d40;
  color: white;
  text-align: center;
}

footer p {
  margin: 0;
  font-weight: 800;
}

footer span {
  color: #9fb3d9;
  font-size: 12px;
}

.mobile-bar {
  position: fixed;
  right: 12px;
  bottom: 12px;
  left: 12px;
  z-index: 18;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 8px;
  padding: 8px;
  border: 1px solid rgba(18, 87, 214, 0.18);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 12px 34px rgba(11, 29, 64, 0.22);
  backdrop-filter: blur(14px);
  opacity: 0;
  pointer-events: none;
  transform: translateY(calc(100% + 24px));
  transition: opacity 180ms ease, transform 180ms ease;
}

.mobile-bar.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.mobile-bar button:first-child {
  background: var(--blue-soft);
  color: var(--blue);
}

.mobile-bar button:last-child {
  background: var(--orange);
  color: white;
}

.wechat-dialog {
  width: min(90vw, 420px);
  border: 0;
  border-radius: 22px;
  padding: 28px;
  box-shadow: 0 28px 90px rgba(6, 20, 52, 0.32);
  text-align: center;
}

.wechat-dialog::backdrop {
  background: rgba(7, 22, 52, 0.72);
}

.wechat-dialog p {
  margin: 0;
  color: var(--blue);
  font-weight: 900;
}

.wechat-dialog h2 {
  margin: 8px 0 18px;
}

.wechat-dialog img {
  width: min(100%, 320px);
  height: auto;
  margin: 0 auto 12px;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.wechat-dialog span {
  color: var(--muted);
}

.dialog-close {
  position: absolute;
  top: 10px;
  right: 10px;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: var(--blue-soft);
  color: var(--blue);
  font-size: 26px;
}

@media (min-width: 700px) {
  .site-header,
  .hero,
  .section-shell {
    padding-right: max(32px, calc((100vw - 1120px) / 2));
    padding-left: max(32px, calc((100vw - 1120px) / 2));
  }

  .hero-actions,
  .closing-cta > div {
    grid-template-columns: 1fr 1fr;
  }

  .package-grid,
  .value-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .case-grid {
    grid-auto-flow: initial;
    grid-auto-columns: initial;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    overflow-x: visible;
    padding-right: 0;
  }

  .reuse-value {
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
    align-items: center;
  }

  .boundary-grid {
    grid-template-columns: 1fr 1fr;
  }

  .brief-form {
    grid-template-columns: 1fr 1fr;
  }

  .field.full,
  .submit-button,
  .form-status {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .site-header {
    min-height: 82px;
  }

  .hero {
    grid-template-columns: minmax(0, 1.6fr) minmax(300px, 0.7fr);
    align-items: end;
    min-height: 720px;
    padding-top: 74px;
    padding-bottom: 74px;
  }

  .hero-side {
    margin-bottom: 2px;
  }

  .section-shell {
    padding-top: 96px;
    padding-bottom: 96px;
  }

  .case-grid {
    gap: 22px;
  }

  .case-poster {
    min-height: 430px;
  }

  .brief-section {
    grid-template-columns: 0.8fr 1.2fr;
    align-items: start;
  }

  .mobile-bar {
    display: none;
  }

  footer {
    padding-bottom: 34px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}