:root {
  --ink: #16241f;
  --ink-soft: #3d4f47;
  --jade: #1f5c45;
  --jade-deep: #134233;
  --mist: #e7eee9;
  --fog: #f3f7f4;
  --sand: #d8c4a0;
  --paper: #fbfcfb;
  --line: rgba(22, 36, 31, 0.12);
  --white: #ffffff;
  --shadow-soft: 0 18px 40px rgba(19, 66, 51, 0.08);
  --header-h: 4.5rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(31, 92, 69, 0.08), transparent 60%),
    radial-gradient(900px 500px at 100% 20%, rgba(216, 196, 160, 0.18), transparent 55%),
    linear-gradient(180deg, var(--fog) 0%, var(--paper) 35%, var(--mist) 100%);
  background-attachment: fixed;
}

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

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

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1,
h2,
h3,
p {
  margin: 0;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  transition: background 0.35s var(--ease), box-shadow 0.35s var(--ease), backdrop-filter 0.35s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(251, 252, 251, 0.9);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--line);
}

.header-inner {
  width: min(1120px, calc(100% - 2.5rem));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 0.35rem;
  background: var(--jade-deep);
  color: var(--sand);
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1;
}

.logo-text {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  color: var(--white);
  transition: color 0.3s var(--ease);
}

.site-header.is-scrolled .logo-text {
  color: var(--ink);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.25s var(--ease), opacity 0.25s var(--ease);
}

.site-header.is-scrolled .site-nav a {
  color: var(--ink-soft);
}

.site-nav a:hover {
  color: var(--sand);
}

.site-header.is-scrolled .site-nav a:hover {
  color: var(--jade);
}

.nav-cta {
  padding: 0.55rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 0.35rem;
}

.site-header.is-scrolled .nav-cta {
  border-color: var(--jade);
  color: var(--jade) !important;
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 1.35rem;
  height: 2px;
  margin: 0.35rem auto;
  background: var(--white);
  transition: background 0.25s var(--ease), transform 0.25s var(--ease);
}

.site-header.is-scrolled .nav-toggle span {
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--white);
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.06);
  will-change: transform;
  transition: transform 1.4s var(--ease);
}

.hero.is-ready .hero-media img {
  transform: scale(1);
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 28, 22, 0.35) 0%, rgba(10, 28, 22, 0.2) 35%, rgba(10, 28, 22, 0.72) 100%),
    linear-gradient(90deg, rgba(10, 28, 22, 0.45) 0%, transparent 55%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 0 0 5.5rem;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 2.4vw, 1.85rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
  opacity: 0;
  transform: translateY(18px);
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 5.5vw, 5.2rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.04em;
  margin-bottom: 1.1rem;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(22px);
}

.hero-lead {
  max-width: 34rem;
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 1.8rem;
  opacity: 0;
  transform: translateY(22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  opacity: 0;
  transform: translateY(22px);
}

.hero.is-ready .brand-name,
.hero.is-ready h1,
.hero.is-ready .hero-lead,
.hero.is-ready .hero-actions {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.hero.is-ready h1 {
  transition-delay: 0.12s;
}

.hero.is-ready .hero-lead {
  transition-delay: 0.22s;
}

.hero.is-ready .hero-actions {
  transition-delay: 0.32s;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.75rem 1.35rem;
  border-radius: 0.35rem;
  border: 1px solid transparent;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--sand);
  color: var(--jade-deep);
}

.btn-primary:hover {
  background: #e2d0ad;
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.55);
  color: var(--white);
  background: transparent;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

.section {
  padding: clamp(4.5rem, 10vw, 7rem) 0;
}

.section-inner {
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 0.85rem;
  color: var(--jade);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.18em;
}

.section h2 {
  max-width: 16ch;
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 3.6vw, 2.7rem);
  line-height: 1.28;
  letter-spacing: 0.02em;
  margin-bottom: 2rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.about-lead {
  font-size: 1.15rem;
  color: var(--ink-soft);
}

.about-points {
  display: grid;
  gap: 1.25rem;
  border-top: 1px solid var(--line);
  padding-top: 1.25rem;
}

.about-points li {
  display: grid;
  gap: 0.25rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px solid var(--line);
}

.about-points strong {
  font-family: var(--font-serif);
  font-size: 1.15rem;
}

.about-points span {
  color: var(--ink-soft);
}

.service-list {
  display: grid;
  gap: 0;
}

.service-item {
  display: grid;
  grid-template-columns: 4.5rem 1fr;
  gap: 1.25rem;
  padding: 1.6rem 0;
  border-top: 1px solid var(--line);
}

.service-item:last-child {
  border-bottom: 1px solid var(--line);
}

.service-index {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  color: var(--jade);
  letter-spacing: 0.04em;
}

.service-item h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin-bottom: 0.45rem;
}

.service-item p {
  max-width: 46rem;
  color: var(--ink-soft);
}

.band-visual {
  position: relative;
  min-height: clamp(18rem, 42vw, 28rem);
  overflow: hidden;
}

.band-visual img {
  width: 100%;
  height: 100%;
  min-height: inherit;
  object-fit: cover;
}

.band-caption {
  position: absolute;
  inset: auto 0 0;
  padding: 2rem;
  background: linear-gradient(180deg, transparent, rgba(10, 28, 22, 0.72));
  color: var(--white);
}

.band-caption p {
  width: min(1120px, 100%);
  margin: 0 auto;
  font-family: var(--font-serif);
  font-size: clamp(1.35rem, 3vw, 2rem);
  letter-spacing: 0.04em;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.25rem;
}

.process-steps li {
  padding-top: 1rem;
  border-top: 2px solid var(--jade);
}

.process-steps h3 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  margin-bottom: 0.55rem;
}

.process-steps p {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.trust {
  background: linear-gradient(180deg, rgba(31, 92, 69, 0.06), transparent 70%);
}

.trust-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.stat-num {
  font-family: var(--font-serif);
  font-size: clamp(2.6rem, 5vw, 3.8rem);
  line-height: 1;
  color: var(--jade-deep);
  margin-bottom: 0.55rem;
}

.stat-num::after {
  content: "+";
  margin-left: 0.1em;
  font-size: 0.7em;
}

.stat-label {
  color: var(--ink-soft);
}

.audience {
  max-width: 42rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.audience h3 {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  margin-bottom: 1rem;
}

.audience ul {
  display: grid;
  gap: 0.7rem;
}

.audience li {
  position: relative;
  padding-left: 1.1rem;
  color: var(--ink-soft);
}

.audience li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--jade);
}

.contact {
  padding-bottom: clamp(5rem, 12vw, 8rem);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.contact-copy .section h2,
.contact-copy h2 {
  max-width: 12ch;
}

.contact-copy > p {
  color: var(--ink-soft);
  margin-bottom: 1.75rem;
}

.contact-meta {
  display: grid;
  gap: 1rem;
}

.contact-meta div {
  display: grid;
  gap: 0.2rem;
}

.contact-meta dt {
  font-size: 0.85rem;
  color: var(--ink-soft);
  letter-spacing: 0.08em;
}

.contact-meta dd {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.15rem;
}

.contact-meta a:hover {
  color: var(--jade);
}

.contact-form {
  display: grid;
  gap: 1rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  box-shadow: var(--shadow-soft);
}

.field {
  display: grid;
  gap: 0.4rem;
}

.field label {
  font-size: 0.9rem;
  font-weight: 600;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 0.35rem;
  padding: 0.85rem 0.95rem;
  font: inherit;
  color: var(--ink);
  background: var(--white);
  transition: border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--jade);
  box-shadow: 0 0 0 3px rgba(31, 92, 69, 0.12);
}

.field textarea {
  resize: vertical;
  min-height: 7rem;
}

.contact-form .btn {
  width: 100%;
  margin-top: 0.25rem;
}

.form-note {
  min-height: 1.4em;
  font-size: 0.92rem;
  color: var(--jade-deep);
}

.form-note.is-error {
  color: #8a2f2f;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--jade-deep);
  color: rgba(255, 255, 255, 0.82);
  padding: 2rem 0;
}

.footer-inner {
  width: min(1120px, calc(100% - 2.5rem));
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.footer-name {
  font-family: var(--font-serif);
  color: var(--white);
  letter-spacing: 0.04em;
}

.footer-tag,
.footer-copy {
  font-size: 0.9rem;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .about-grid,
  .contact-layout,
  .trust-stats,
  .process-steps {
    grid-template-columns: 1fr;
  }

  .process-steps {
    gap: 0;
  }

  .process-steps li {
    padding: 1.15rem 0;
    border-top: 1px solid var(--line);
  }

  .process-steps li:first-child {
    border-top: 2px solid var(--jade);
  }

  .service-item {
    grid-template-columns: 3rem 1fr;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
    z-index: 120;
  }

  .site-nav {
    position: fixed;
    inset: 0 0 auto;
    display: grid;
    gap: 0;
    padding: calc(var(--header-h) + 0.5rem) 1.25rem 1.25rem;
    background: rgba(251, 252, 251, 0.98);
    border-bottom: 1px solid var(--line);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s var(--ease), opacity 0.35s var(--ease);
  }

  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a {
    color: var(--ink) !important;
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--line);
  }

  .nav-cta {
    border: 0 !important;
    padding-left: 0;
  }

  .nav-toggle[aria-expanded="true"] span:first-child {
    transform: translateY(4px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }

  .hero-content {
    padding-bottom: 4rem;
  }

  .section h2 {
    max-width: none;
  }
}

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

  .reveal,
  .hero-media img,
  .brand-name,
  .hero h1,
  .hero-lead,
  .hero-actions {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}