* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --red: #d71920;
  --dark: #111111;
  --gray-bg: #f7f7f7;
  --line: #ececec;
  --text: #222222;
  --sub: #666666;
  --white: #ffffff;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Pretendard", sans-serif;
  color: var(--text);
  background: #fff;
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

.inner {
  width: min(1400px, calc(100% - 80px));
  margin: 0 auto;
}

.section {
  padding: 120px 0;
}

.section-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--red);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.section-label.light {
  color: #ffb3b3;
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-head h2 {
  font-size: clamp(34px, 5vw, 56px);
  line-height: 1.15;
  margin-bottom: 16px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.section-head p {
  color: var(--sub);
  font-size: 17px;
}

/* header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 999;
  background: rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: 0.35s ease;
}

.header.scrolled {
  background: rgba(10, 10, 10, 0.9);
}

.header-inner {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  font-size: 28px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.04em;
}

.nav {
  display: flex;
  gap: 30px;
}

.nav a {
  color: rgba(255,255,255,0.88);
  font-size: 15px;
  position: relative;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -7px;
  width: 0;
  height: 2px;
  background: var(--red);
  transition: 0.3s ease;
}

.nav a:hover::after {
  width: 100%;
}

.header-btn {
  padding: 12px 20px;
  border-radius: 999px;
  background: var(--red);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 0;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
  display: block;
  margin: 0 auto;
}

.mobile-menu {
  display: none;
  flex-direction: column;
  gap: 18px;
  padding: 24px 40px 30px;
  background: #111;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.mobile-menu a {
  color: #fff;
  font-size: 15px;
}

.mobile-menu.active {
  display: flex;
}

/* hero */
.seminar-hero {
  position: relative;
  min-height: 86vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #111;
  background-image: linear-gradient(90deg, rgba(0,0,0,0.78) 0%, rgba(0,0,0,0.42) 50%, rgba(0,0,0,0.24) 100%),url("../img/푸꾸옥\ 메인배경.jpg");
  color: white;
  background-repeat: no-repeat;
  background-size: cover;
}

.seminar-hero-bg {
  position: absolute;
  inset: 0;
  transform: scale(1.04);
}

.seminar-hero-inner {
  position: relative;
  z-index: 2;
  padding-top: 90px;
}

.seminar-hero-copy {
  max-width: 760px;
  color: #fff;
}

.page-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.24em;
  color: #ffb2b2;
  margin-bottom: 18px;
}

.seminar-hero-copy h1 {
  font-size: clamp(48px, 7vw, 96px);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -0.05em;
  margin-bottom: 18px;
}

.seminar-hero-copy p {
  font-size: 18px;
  color: white;
  max-width: 640px;
}

/* intro */
.intro-section {
  background: #fff;
}

.intro-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.intro-image img {
  height: 560px;
  object-fit: cover;
  border-radius: 30px;
  box-shadow: var(--shadow);
}

.intro-text h2 {
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 20px;
}

.intro-text p {
  color: #fff;
  font-size: 17px;
  margin-bottom: 14px;
}

/* summary */
.summary-section {
  background: var(--gray-bg);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.summary-card {
  background: #fff;
  border-radius: 24px;
  border: 1px solid var(--line);
  padding: 30px 24px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.04);
}

.summary-card span {
  display: inline-block;
  font-size: 46px;
  line-height: 1;
  color: rgba(215, 25, 32, 0.1);
  font-weight: 900;
  margin-bottom: 16px;
}

.summary-card h3 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 12px;
}

.summary-card p {
  color: #555;
  font-size: 15px;
}

/* image sections */
.story-section {
  background: #fff;
}

.story-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 34px;
  align-items: center;
  margin-bottom: 90px;
}

.story-row:last-child {
  margin-bottom: 0;
}

.story-row.reverse {
  direction: rtl;
}

.story-row.reverse > * {
  direction: ltr;
}

.story-image img {
  height: 500px;
  object-fit: cover;
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.story-text h2 {
  font-size: clamp(32px, 4vw, 50px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.04em;
  margin-bottom: 18px;
}

.story-text p {
  color: #555;
  font-size: 17px;
  margin-bottom: 14px;
}

/* quote */
.quote-section {
  background: #111;
}

.quote-box {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
  color: #fff;
  padding: 60px 40px;
  border-radius: 30px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
}

.quote-box p {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.4;
  font-weight: 700;
  letter-spacing: -0.03em;
}

/* cta */
.cta-section {
  position: relative;
  min-height: 400px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.cta-bg {
  position: absolute;
  inset: 0;
  background: url("../img/베트남 도시배경.jpg") center center / cover no-repeat;
}

.cta-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.58);
}

.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
}

.cta-inner h2 {
  font-size: clamp(34px, 4vw, 56px);
  line-height: 1.1;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-inner p {
  color: rgba(255,255,255,0.84);
  font-size: 17px;
  margin-bottom: 28px;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 170px;
  padding: 15px 28px;
  border-radius: 999px;
  background: var(--red);
  color: #fff;
  font-weight: 700;
}

/* footer */
.footer {
  background: #111;
  color: #fff;
  padding: 70px 0 46px;
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 40px;
}

.footer-left {
  width: 28%;
}

.footer-right {
  width: 72%;
}

.footer-logo {
  display: inline-block;
  font-size: 40px;
  font-weight: 900;
  letter-spacing: -0.05em;
}

.footer-desc {
  max-width: 760px;
  color: rgba(255,255,255,0.78);
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 28px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.52);
  font-size: 14px;
}

/* animation */
.reveal-up,
.reveal-left,
.reveal-right {
  opacity: 0;
  transition: 0.8s ease;
}

.reveal-up {
  transform: translateY(50px);
}

.reveal-left {
  transform: translateX(-50px);
}

.reveal-right {
  transform: translateX(50px);
}

.reveal-up.active,
.reveal-left.active,
.reveal-right.active {
  opacity: 1;
  transform: translate(0, 0);
}

/* responsive */
@media (max-width: 1200px) {
  .summary-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 980px) {
  .inner {
    width: calc(100% - 40px);
  }

  .nav,
  .header-btn {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .intro-inner,
  .story-row,
  .footer-inner {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .mobile-menu.active {
    display: flex;
  }

  .footer-left,
  .footer-right {
    width: 100%;
  }

  .story-row.reverse {
    direction: ltr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 90px 0;
  }

  .seminar-hero {
    min-height: 72vh;
  }

  .seminar-hero-copy h1 {
    font-size: 46px;
  }

  .intro-image img,
  .story-image img {
    height: 320px;
  }

  .quote-box {
    padding: 40px 22px;
  }

  .footer-bottom {
    flex-direction: column;
  }
}

@media (max-width: 768px) {
  .reveal-left,
  .reveal-right {
    transform: translateY(40px) !important;
  }
}