:root {
  --paper: #f4f6f2;
  --surface: #ffffff;
  --ink: #15191f;
  --soft-ink: #3d4652;
  --muted: #6d7683;
  --line: rgba(21, 25, 31, 0.14);
  --accent: #2457d6;
  --accent-ink: #10265f;
  --sage: #dfe8df;
  --mist: #e8edf2;
  --shadow: 0 24px 70px rgba(30, 42, 55, 0.14);
  --radius: 18px;
  --max: 1160px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(21, 25, 31, 0.035) 1px, transparent 1px) 0 0 / 64px 64px,
    linear-gradient(180deg, rgba(36, 87, 214, 0.05), transparent 360px),
    var(--paper);
  font-family: "Avenir Next", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}

body.nav-open {
  overflow: hidden;
}

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

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

.skip-link {
  position: fixed;
  left: 18px;
  top: 14px;
  z-index: 100;
  padding: 10px 14px;
  color: var(--surface);
  background: var(--ink);
  border-radius: 999px;
  transform: translateY(-150%);
}

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

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 70px;
  padding: 12px clamp(18px, 4vw, 54px);
  color: var(--ink);
  background: rgba(244, 246, 242, 0.84);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
}

.brand img {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 10px 24px rgba(21, 25, 31, 0.12);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 17px;
  line-height: 1.05;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.main-nav {
  display: flex;
  justify-content: flex-end;
  gap: clamp(16px, 2vw, 28px);
  flex: 1 1 auto;
  color: var(--soft-ink);
  font-size: 14px;
}

.main-nav a {
  padding: 8px 0;
  border-bottom: 1px solid transparent;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
  outline: 0;
}

.menu-button {
  display: none;
  width: 42px;
  height: 38px;
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
  cursor: pointer;
}

.menu-button span {
  display: block;
  height: 2px;
  margin: 4px 0;
  background: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.72fr);
  gap: clamp(28px, 6vw, 78px);
  width: min(var(--max), calc(100% - 40px));
  min-height: calc(100dvh - 70px);
  margin: 0 auto;
  padding: clamp(48px, 8vw, 92px) 0 56px;
  align-items: center;
}

.role-label {
  width: fit-content;
  margin: 0 0 22px;
  padding: 8px 12px;
  color: var(--accent-ink);
  background: rgba(36, 87, 214, 0.1);
  border: 1px solid rgba(36, 87, 214, 0.18);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: clamp(72px, 13vw, 168px);
  line-height: 0.92;
  letter-spacing: 0;
}

.hero-line {
  max-width: 640px;
  margin: 28px 0 0;
  color: var(--soft-ink);
  font-size: clamp(20px, 2.6vw, 31px);
  line-height: 1.32;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 220ms var(--ease), box-shadow 220ms var(--ease), background 220ms var(--ease);
}

.primary-action {
  color: var(--surface);
  background: var(--ink);
  box-shadow: 0 16px 36px rgba(21, 25, 31, 0.2);
}

.secondary-action {
  color: var(--ink);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.64);
}

.primary-action:hover,
.secondary-action:hover {
  transform: translateY(-2px);
}

.primary-action:active,
.secondary-action:active {
  transform: translateY(1px);
}

.hero-visual {
  position: relative;
  min-height: 620px;
}

.hero-visual img {
  width: 100%;
  height: 620px;
  object-fit: cover;
  object-position: center;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.note-card {
  position: absolute;
  left: -36px;
  bottom: 42px;
  width: min(320px, calc(100% - 28px));
  padding: 22px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(21, 25, 31, 0.12);
  border-radius: var(--radius);
  box-shadow: 0 18px 45px rgba(21, 25, 31, 0.16);
  backdrop-filter: blur(18px);
}

.note-card span {
  display: block;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
}

.note-card strong {
  display: block;
  margin-top: 10px;
  font-size: 20px;
  line-height: 1.34;
}

.intro-strip {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 22px;
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.intro-strip p {
  margin: 0;
  color: var(--soft-ink);
  font-size: clamp(18px, 2.2vw, 26px);
  line-height: 1.35;
}

.intro-strip p:first-child {
  color: var(--accent);
  font-weight: 800;
}

.section {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(72px, 10vw, 116px) 0;
}

.section h2,
.contact h2 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(36px, 5.4vw, 74px);
  line-height: 1.06;
  letter-spacing: 0;
}

.section p,
.contact p {
  color: var(--soft-ink);
}

.section-text p {
  max-width: 720px;
  margin: 24px 0 0;
  font-size: 17px;
}

.section-text.narrow p {
  max-width: 620px;
}

.about {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(320px, 0.72fr);
  gap: clamp(34px, 6vw, 72px);
  align-items: center;
}

.portrait-panel {
  margin: 0;
}

.portrait-panel img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.portrait-panel figcaption {
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
}

.method {
  padding-top: 38px;
}

.method-list {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 16px;
  margin-top: 36px;
}

.method-list article {
  min-height: 230px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.72);
}

.method-list article:first-child {
  grid-row: span 2;
  min-height: 476px;
  background:
    linear-gradient(150deg, rgba(36, 87, 214, 0.14), rgba(255, 255, 255, 0.68)),
    var(--surface);
}

.method-list span,
.image-journal span,
.contact-box span {
  display: block;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
}

.method-list p {
  margin: 22px 0 0;
  color: var(--soft-ink);
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.42;
}

.image-journal {
  display: grid;
  grid-template-columns: 1.25fr 0.9fr 0.9fr;
  gap: 16px;
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding-bottom: clamp(76px, 10vw, 118px);
}

.image-journal article {
  overflow: hidden;
  min-height: 420px;
  border-radius: var(--radius);
  background: var(--ink);
  box-shadow: var(--shadow);
}

.image-journal img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.image-journal article:first-child img {
  height: 420px;
}

.image-journal div {
  padding: 22px;
}

.image-journal p {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.78);
}

.work {
  border-top: 1px solid var(--line);
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 38px;
}

.work-grid article {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}

.work-grid article:nth-child(2) {
  background: var(--sage);
}

.work-grid article:nth-child(3) {
  background: var(--mist);
}

.work-grid h3,
.note-list h3 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.22;
}

.work-grid p {
  margin: 16px 0 0;
  color: var(--soft-ink);
}

.notes {
  padding-top: 32px;
}

.note-list {
  display: grid;
  gap: 0;
  margin-top: 34px;
  border-top: 1px solid var(--line);
}

.note-list article {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 24px;
  align-items: baseline;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.note-list time {
  color: var(--accent);
  font-size: 14px;
  font-weight: 800;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: clamp(32px, 6vw, 72px);
  align-items: center;
  padding: clamp(72px, 10vw, 116px) max(20px, calc((100% - var(--max)) / 2));
  color: var(--surface);
  background:
    radial-gradient(circle at 12% 18%, rgba(36, 87, 214, 0.28), transparent 34%),
    #15191f;
}

.contact p {
  max-width: 650px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 17px;
}

.contact-box {
  display: grid;
  gap: 12px;
}

.contact-box a {
  display: block;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.07);
  transition: transform 220ms var(--ease), background 220ms var(--ease);
}

.contact-box a:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.11);
}

.contact-box strong {
  display: block;
  margin-top: 8px;
  color: var(--surface);
  font-size: 18px;
  overflow-wrap: anywhere;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 26px max(20px, calc((100% - var(--max)) / 2));
  color: rgba(255, 255, 255, 0.66);
  background: #101318;
  font-size: 13px;
}

@media (prefers-reduced-motion: no-preference) {
  .intro-strip,
  .section,
  .image-journal {
    animation: rise-in 700ms var(--ease) both;
  }

  .hero-visual {
    animation-delay: 100ms;
  }

  .intro-strip {
    animation-delay: 180ms;
  }
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .site-header {
    min-height: 68px;
  }

  .menu-button {
    display: inline-block;
    margin-left: auto;
  }

  .main-nav {
    position: fixed;
    inset: 68px 0 auto;
    display: none;
    grid-template-columns: 1fr;
    gap: 0;
    padding: 8px 20px 20px;
    color: var(--ink);
    background: rgba(244, 246, 242, 0.98);
    border-bottom: 1px solid var(--line);
  }

  body.nav-open .main-nav {
    display: grid;
  }

  .main-nav a {
    padding: 15px 0;
    border-bottom: 1px solid var(--line);
  }

  .hero,
  .about,
  .method-list,
  .image-journal,
  .work-grid,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 54px;
  }

  .hero-visual {
    min-height: auto;
  }

  .hero-visual img {
    height: 520px;
  }

  .note-card {
    left: 22px;
    bottom: 22px;
  }

  .intro-strip {
    grid-template-columns: 1fr;
  }

  .method-list article:first-child {
    grid-row: auto;
    min-height: 230px;
  }

  .image-journal article:first-child img,
  .image-journal img,
  .portrait-panel img {
    height: 380px;
  }

  footer {
    display: grid;
  }
}

@media (max-width: 620px) {
  .site-header {
    padding-inline: 14px;
    gap: 10px;
  }

  .brand small {
    display: none;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .hero {
    width: min(100% - 32px, var(--max));
    gap: 30px;
    padding-bottom: 34px;
  }

  .hero h1 {
    font-size: clamp(58px, 18vw, 92px);
  }

  .hero-line {
    font-size: 20px;
  }

  .hero-actions {
    display: grid;
  }

  .primary-action,
  .secondary-action {
    width: 100%;
  }

  .hero-visual img {
    height: 420px;
  }

  .note-card {
    position: relative;
    left: auto;
    bottom: auto;
    width: 100%;
    margin-top: 12px;
  }

  .intro-strip,
  .section,
  .image-journal {
    width: min(100% - 32px, var(--max));
  }

  .section {
    padding: 64px 0;
  }

  .section h2,
  .contact h2 {
    font-size: clamp(32px, 11vw, 46px);
  }

  .method-list article,
  .work-grid article {
    padding: 22px;
  }

  .note-list article {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .contact {
    padding: 64px 16px;
  }
}