/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --c-primary: #0a2540;
  --c-accent: #1a6fa8;
  --c-accent2: #c8a84b;
  --c-bg: #f7f8fa;
  --c-bg-dark: #0a2540;
  --c-text: #1a2332;
  --c-text-muted: #5a6a7a;
  --c-white: #ffffff;
  --c-border: #e2e8f0;
  --radius: 8px;
  --shadow: 0 4px 24px rgba(10,37,64,.10);
  --shadow-lg: 0 12px 48px rgba(10,37,64,.18);
  --transition: .3s cubic-bezier(.4,0,.2,1);
  --font-cn: 'Noto Sans SC', sans-serif;
  --font-en: 'Inter', sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-cn);
  color: var(--c-text);
  background: var(--c-white);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-family: var(--font-cn);
  font-size: .95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
}
.btn--primary {
  background: var(--c-accent);
  color: var(--c-white);
  border-color: var(--c-accent);
}
.btn--primary:hover { background: #155d8e; border-color: #155d8e; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,111,168,.3); }
.btn--outline {
  background: transparent;
  color: var(--c-white);
  border-color: rgba(255,255,255,.6);
}
.btn--outline:hover { background: rgba(255,255,255,.1); border-color: var(--c-white); }

/* ===== NAV ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0;
  transition: background var(--transition), box-shadow var(--transition);
}
.nav.scrolled {
  background: rgba(10,37,64,.97);
  box-shadow: 0 2px 20px rgba(0,0,0,.2);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}
.nav__logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.nav__logo-img {
  height: 48px;
  width: 48px;
  object-fit: contain;
  border-radius: 6px;
}
.nav__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}
.nav__logo-cn {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: .05em;
}
.nav__logo-en {
  font-size: .62rem;
  font-family: var(--font-en);
  color: var(--c-accent2);
  letter-spacing: .18em;
  font-weight: 500;
}
.nav__menu {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav__menu a {
  color: rgba(255,255,255,.8);
  font-size: .92rem;
  padding: 8px 14px;
  border-radius: 4px;
  transition: var(--transition);
  font-weight: 400;
  position: relative;
}
.nav__menu a::after {
  content: '';
  position: absolute;
  bottom: 4px; left: 14px; right: 14px;
  height: 2px;
  background: var(--c-accent2);
  border-radius: 1px;
  transform: scaleX(0);
  transition: transform var(--transition);
}
.nav__menu a:hover,
.nav__menu a.active { color: var(--c-white); }
.nav__menu a:hover::after,
.nav__menu a.active::after { transform: scaleX(1); }
.nav__cta {
  background: var(--c-accent) !important;
  color: var(--c-white) !important;
  padding: 9px 20px !important;
  border-radius: var(--radius) !important;
  font-weight: 500 !important;
}
.nav__cta::after { display: none !important; }
.nav__cta:hover { background: #155d8e !important; }
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-white);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #0a2540 0%, #0d3a6e 40%, #1a5a8a 70%, #0a2540 100%);
}
.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(200,168,75,.08) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(26,111,168,.15) 0%, transparent 40%),
    url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(10,37,64,.6) 0%, transparent 60%);
}
.hero__content {
  position: relative;
  z-index: 2;
  padding-top: 100px;
}
.hero__sub {
  font-family: var(--font-en);
  font-size: .85rem;
  letter-spacing: .3em;
  color: var(--c-accent2);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.hero__title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.2;
  margin-bottom: 12px;
}
.hero__en {
  font-family: var(--font-en);
  font-size: clamp(.9rem, 1.5vw, 1.1rem);
  letter-spacing: .25em;
  color: rgba(255,255,255,.5);
  margin-bottom: 20px;
}
.hero__tagline {
  font-size: 1.05rem;
  color: var(--c-accent2);
  letter-spacing: .1em;
  margin-bottom: 40px;
}
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}
.hero__scroll span {
  display: block;
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255,255,255,.3);
  border-radius: 12px;
  position: relative;
}
.hero__scroll span::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: rgba(255,255,255,.6);
  border-radius: 2px;
  animation: scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot { 0%,100%{top:6px;opacity:1} 80%{top:20px;opacity:0} }

/* ===== STATS ===== */
.stats {
  background: var(--c-primary);
  padding: 32px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stats__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px;
  border-right: 1px solid rgba(255,255,255,.1);
}
.stats__item:last-child { border-right: none; }
.stats__num {
  font-family: var(--font-en);
  font-size: 2rem;
  font-weight: 700;
  color: var(--c-accent2);
  line-height: 1;
  margin-bottom: 6px;
}
.stats__num sup { font-size: .9rem; }
.stats__label {
  font-size: .8rem;
  color: rgba(255,255,255,.6);
  letter-spacing: .05em;
}

/* ===== SECTION COMMON ===== */
.section { padding: 96px 0; }
.section__header { text-align: center; margin-bottom: 64px; }
.section__en {
  display: block;
  font-family: var(--font-en);
  font-size: .75rem;
  letter-spacing: .3em;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section__title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 16px;
}
.section__line {
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-accent2));
  margin: 0 auto 16px;
  border-radius: 2px;
}
.section__sub {
  font-size: .9rem;
  color: var(--c-text-muted);
  letter-spacing: .05em;
}
.section__header--light .section__en { color: var(--c-accent2); }
.section__header--light .section__title { color: var(--c-white); }
.section__header--light .section__sub { color: rgba(255,255,255,.6); }

/* ===== ABOUT ===== */
.about { background: var(--c-white); }
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 64px;
  align-items: center;
}
.about__visual {
  position: relative;
  height: 360px;
}
.about__badge {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--c-primary) 0%, #1a4a7a 100%);
  border-radius: 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 40px;
  text-align: center;
  overflow: hidden;
}
.about__badge::before {
  content: '';
  position: absolute;
  top: -40px; right: -40px;
  width: 200px; height: 200px;
  border-radius: 50%;
  background: rgba(200,168,75,.08);
}
.about__badge span:nth-child(1) {
  font-family: var(--font-en);
  font-size: .75rem;
  letter-spacing: .3em;
  color: var(--c-accent2);
  text-transform: uppercase;
}
.about__badge span:nth-child(2) {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--c-white);
  letter-spacing: .05em;
}
.about__badge span:nth-child(3) {
  font-family: var(--font-en);
  font-size: .7rem;
  letter-spacing: .2em;
  color: rgba(255,255,255,.5);
}
.about__geo {
  position: absolute;
  border: 1px solid rgba(26,111,168,.2);
  border-radius: 50%;
}
.geo--1 { width: 120px; height: 120px; bottom: -20px; right: -20px; }
.geo--2 { width: 60px; height: 60px; bottom: 20px; right: 20px; background: rgba(200,168,75,.1); }
.about__text p {
  color: var(--c-text-muted);
  margin-bottom: 20px;
  font-size: .95rem;
  line-height: 1.9;
}
.about__text p:last-child { margin-bottom: 0; }

/* ===== SERVICES ===== */
.services { background: var(--c-primary); }
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.services__card {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 12px;
  padding: 40px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.services__card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-accent2));
  transform: scaleX(0);
  transition: var(--transition);
}
.services__card:hover { background: rgba(255,255,255,.08); transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.services__card:hover::before { transform: scaleX(1); }
.services__card--featured {
  background: rgba(26,111,168,.15);
  border-color: rgba(26,111,168,.3);
}
.services__card--featured::before { transform: scaleX(1); }
.services__icon {
  width: 56px; height: 56px;
  color: var(--c-accent2);
  margin-bottom: 24px;
}
.services__card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 10px;
}
.services__card > p {
  font-size: .85rem;
  color: rgba(255,255,255,.5);
  margin-bottom: 20px;
  font-family: var(--font-en);
}
.services__card ul { display: flex; flex-direction: column; gap: 8px; }
.services__card li {
  font-size: .88rem;
  color: rgba(255,255,255,.7);
  padding-left: 16px;
  position: relative;
}
.services__card li::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-accent2);
}

/* ===== ADVANTAGES ===== */
.advantages { background: var(--c-bg); }
.advantages__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.advantages__item {
  background: var(--c-white);
  border-radius: 12px;
  padding: 36px 28px;
  position: relative;
  transition: var(--transition);
  border: 1px solid var(--c-border);
}
.advantages__item:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--c-accent); }
.advantages__num {
  font-family: var(--font-en);
  font-size: 3rem;
  font-weight: 700;
  color: rgba(10,37,64,.06);
  line-height: 1;
  margin-bottom: 16px;
}
.advantages__icon {
  width: 44px; height: 44px;
  color: var(--c-accent);
  margin-bottom: 16px;
}
.advantages__item h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 10px;
}
.advantages__item p { font-size: .88rem; color: var(--c-text-muted); line-height: 1.8; }

/* ===== DISCIPLINES ===== */
.disciplines { background: var(--c-primary); }
.disciplines__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.disciplines__item {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  padding: 16px 20px;
  transition: var(--transition);
}
.disciplines__item:hover { background: rgba(255,255,255,.1); border-color: rgba(200,168,75,.3); }
.disciplines__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--c-accent2);
  flex-shrink: 0;
}
.disciplines__item span { font-size: .9rem; color: rgba(255,255,255,.85); }

/* ===== TOOLS ===== */
.tools { background: var(--c-white); }
.tools__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.tools__category {
  background: var(--c-bg);
  border-radius: 12px;
  padding: 28px 24px;
  border: 1px solid var(--c-border);
  transition: var(--transition);
}
.tools__category:hover { border-color: var(--c-accent); box-shadow: var(--shadow); }
.tools__category h4 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--c-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--c-accent2);
  letter-spacing: .05em;
}
.tools__category li {
  font-size: .85rem;
  color: var(--c-text-muted);
  padding: 5px 0;
  border-bottom: 1px solid var(--c-border);
  font-family: var(--font-en);
}
.tools__category li:last-child { border-bottom: none; }

/* ===== DELIVERABLES ===== */
.deliverables { background: var(--c-primary); }
.deliverables__cats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.deliverables__cat {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 12px;
  padding: 32px 28px;
  transition: var(--transition);
}
.deliverables__cat:hover { background: rgba(255,255,255,.09); transform: translateY(-3px); }
.deliverables__cat-icon {
  width: 48px; height: 48px;
  color: var(--c-accent2);
  margin-bottom: 20px;
}
.deliverables__cat h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 10px;
}
.deliverables__cat p { font-size: .85rem; color: rgba(255,255,255,.6); line-height: 1.8; }

/* ===== PHILOSOPHY ===== */
.philosophy { background: var(--c-bg); }
.philosophy__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}
.philosophy__block {
  background: var(--c-white);
  border-radius: 12px;
  padding: 48px 40px;
  border: 1px solid var(--c-border);
  position: relative;
  overflow: hidden;
}
.philosophy__block::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--c-accent), var(--c-accent2));
}
.philosophy__label {
  font-family: var(--font-en);
  font-size: .72rem;
  letter-spacing: .25em;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: 20px;
}
.philosophy__quote {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  font-weight: 700;
  color: var(--c-primary);
  line-height: 1.6;
  letter-spacing: .08em;
  border-left: 4px solid var(--c-accent2);
  padding-left: 20px;
}
.philosophy__text {
  font-size: .95rem;
  color: var(--c-text-muted);
  line-height: 1.9;
}

/* ===== BRAND ===== */
.brand { background: var(--c-primary); }
.brand__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.brand__item {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 12px;
  padding: 40px 32px;
  text-align: center;
  transition: var(--transition);
}
.brand__item:hover { background: rgba(255,255,255,.09); transform: translateY(-4px); }
.brand__item--mid {
  background: rgba(200,168,75,.08);
  border-color: rgba(200,168,75,.25);
}
.brand__char {
  font-size: 4rem;
  font-weight: 700;
  color: var(--c-accent2);
  line-height: 1;
  margin-bottom: 20px;
  text-shadow: 0 0 40px rgba(200,168,75,.3);
}
.brand__item h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 14px;
  letter-spacing: .05em;
}
.brand__item p { font-size: .88rem; color: rgba(255,255,255,.65); line-height: 1.8; }

/* ===== CONTACT ===== */
.contact { background: var(--c-bg); }
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.contact__info { display: flex; flex-direction: column; gap: 28px; }
.contact__item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}
.contact__icon {
  width: 44px; height: 44px;
  background: var(--c-accent);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-white);
  flex-shrink: 0;
  padding: 10px;
}
.contact__item strong {
  display: block;
  font-size: .85rem;
  color: var(--c-text-muted);
  margin-bottom: 4px;
  font-weight: 500;
}
.contact__item p { font-size: .95rem; color: var(--c-primary); font-weight: 500; }
.contact__cta {
  background: var(--c-primary);
  border-radius: 16px;
  padding: 48px 40px;
  color: var(--c-white);
}
.contact__cta h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 16px; }
.contact__cta p { color: rgba(255,255,255,.7); margin-bottom: 28px; line-height: 1.8; }

/* ===== FOOTER ===== */
.footer {
  background: #060f1e;
  padding: 48px 0 0;
}
.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer__brand { display: flex; flex-direction: column; gap: 6px; }
.footer__logo-cn {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-white);
}
.footer__logo-en {
  font-family: var(--font-en);
  font-size: .65rem;
  letter-spacing: .2em;
  color: var(--c-accent2);
}
.footer__brand p { font-size: .82rem; color: rgba(255,255,255,.4); margin-top: 4px; }
.footer__links {
  display: flex;
  gap: 24px;
  align-items: center;
}
.footer__links a {
  font-size: .85rem;
  color: rgba(255,255,255,.5);
  transition: var(--transition);
}
.footer__links a:hover { color: var(--c-white); }
.footer__bottom {
  padding: 20px 0;
  text-align: center;
}
.footer__bottom p { font-size: .78rem; color: rgba(255,255,255,.3); }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .advantages__grid { grid-template-columns: repeat(2, 1fr); }
  .disciplines__grid { grid-template-columns: repeat(3, 1fr); }
  .tools__grid { grid-template-columns: repeat(2, 1fr); }
  .deliverables__cats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  /* Nav */
  .nav__toggle { display: flex; }
  .nav__inner { height: 60px; }
  .nav__logo { gap: 8px; }
  .nav__logo-img { height: 32px; width: 32px; }
  .nav__logo-cn { font-size: 1rem; }
  .nav__logo-en { display: none; }
  .nav__menu {
    position: fixed;
    top: 60px; left: 0; right: 0;
    background: rgba(10,37,64,.98);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    transform: translateY(-110%);
    transition: transform var(--transition);
    border-bottom: 1px solid rgba(255,255,255,.1);
    max-height: calc(100vh - 60px);
    overflow-y: auto;
  }
  .nav__menu.open { transform: translateY(0); }
  .nav__menu a { width: 100%; padding: 12px 16px; font-size: .95rem; }
  .nav__menu a::after { left: 16px; right: 16px; }

  /* Hero */
  .hero__content { padding-top: 80px; }
  .hero__title { font-size: 2rem; }
  .hero__tagline { font-size: .9rem; }
  .hero__actions { flex-direction: column; gap: 12px; }
  .hero__actions .btn { width: 100%; justify-content: center; }

  /* Stats */
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stats__item { padding: 20px 12px; }
  .stats__item:nth-child(2) { border-right: none; }
  .stats__item:nth-child(3) { border-top: 1px solid rgba(255,255,255,.1); }
  .stats__item:nth-child(4) { border-top: 1px solid rgba(255,255,255,.1); border-right: none; }
  .stats__num { font-size: 1.6rem; }

  /* Sections */
  .section { padding: 56px 0; }
  .section__header { margin-bottom: 40px; }

  /* About */
  .about__grid { grid-template-columns: 1fr; gap: 32px; }
  .about__visual { height: 180px; }
  .about__text p { font-size: .9rem; }

  /* Services */
  .services__grid { grid-template-columns: 1fr; gap: 16px; }
  .services__card { padding: 28px 24px; }

  /* Advantages */
  .advantages__grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .advantages__item { padding: 24px 20px; }
  .advantages__num { font-size: 2rem; }

  /* Disciplines */
  .disciplines__grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .disciplines__item { padding: 12px 14px; }

  /* Tools */
  .tools__grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .tools__category { padding: 20px 18px; }

  /* Deliverables */
  .deliverables__cats { grid-template-columns: 1fr; gap: 16px; }
  .deliverables__cat { padding: 24px 20px; }

  /* Philosophy */
  .philosophy__grid { grid-template-columns: 1fr; gap: 20px; }
  .philosophy__block { padding: 32px 24px; }
  .philosophy__quote { font-size: 1.05rem; }

  /* Brand */
  .brand__grid { grid-template-columns: 1fr; gap: 16px; }
  .brand__item { padding: 28px 24px; }
  .brand__char { font-size: 3rem; }

  /* Contact */
  .contact__grid { grid-template-columns: 1fr; gap: 32px; }
  .contact__cta { padding: 32px 24px; }

  /* Footer */
  .footer__inner { flex-direction: column; gap: 20px; }
  .footer__links { flex-wrap: wrap; gap: 12px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .nav__inner { height: 56px; }
  .nav__menu { top: 56px; max-height: calc(100vh - 56px); }
  .nav__logo { gap: 8px; }
  .nav__logo-img { height: 30px; width: 30px; }
  .nav__logo-cn { font-size: .95rem; }

  .hero__title { font-size: 1.75rem; }
  .hero__sub { font-size: .75rem; letter-spacing: .2em; }

  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .stats__num { font-size: 1.4rem; }
  .stats__label { font-size: .72rem; }

  .advantages__grid { grid-template-columns: 1fr; }
  .disciplines__grid { grid-template-columns: 1fr; }
  .tools__grid { grid-template-columns: 1fr; }

  .section__title { font-size: 1.4rem; }
  .section { padding: 48px 0; }
}

/* ===== ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}