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

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

body {
  font-family: 'Noto Serif SC', serif;
  color: #1a1a1a;
  background: #fff;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ===== Typography ===== */
h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.3;
}

/* ===== Utility ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

.blue {
  color: #2F80ED;
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 72px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 60px;
  z-index: 1000;
  border-bottom: 1px solid #eee;
}

.navbar .logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 2px;
}

.navbar nav {
  display: flex;
  gap: 36px;
  align-items: center;
}

.navbar nav a {
  font-size: 0.95rem;
  color: #333;
  transition: color 0.2s;
}

.navbar nav a:hover {
  color: #2F80ED;
}

.navbar .cta-btn {
  background: #2F80ED;
  color: #fff;
  padding: 10px 24px;
  font-size: 0.9rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s;
}

.navbar .cta-btn:hover {
  background: #1a6dd4;
}

/* ===== Sections Common ===== */
.section {
  min-height: auto;
  display: flex;
  align-items: center;
  padding: 60px 0;
}

.section-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 60px;
  width: 100%;
}

.section-inner--reverse {
  grid-template-columns: 1fr 1fr;
}

.section-inner--reverse .section-text {
  order: -1;
}

.section-img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.section-img-placeholder {
  width: 100%;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #999;
  font-size: 0.9rem;
  overflow: hidden;
}

.hero .section-img-placeholder {
  max-height: 500px;
}

.hero .section-img-placeholder .section-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* ===== Hero Section ===== */
.hero {
  padding-top: 92px;
  padding-bottom: 40px;
}

.hero .section-text h1 {
  font-size: 3.5rem;
  margin-bottom: 16px;
  color: #1a1a1a;
}

.hero .section-text h1 .damn {
  font-size: 5rem;
  font-style: italic;
  display: block;
  margin-bottom: 8px;
}

.hero .damn-img {
  max-width: 420px;
  width: 80%;
  height: auto;
  margin-bottom: 16px;
}

.hero .damn-img-wrapper,
.hero .rdc-sig-wrapper {
  position: relative;
  background: #fff;
}

.hero .damn-img-wrapper .img-placeholder-text,
.hero .rdc-sig-wrapper .img-placeholder-text {
  display: none;
}

.hero .damn-img-wrapper.placeholder-active {
  background: #f0f0f0;
  border: 2px dashed #ccc;
  padding: 40px 32px;
  max-width: 420px;
  width: 80%;
  margin-bottom: 16px;
}

.hero .damn-img-wrapper.placeholder-active .img-placeholder-text {
  display: block;
  color: #999;
  font-size: 0.9rem;
}

.hero .rdc-sig-wrapper.placeholder-active {
  background: #f0f0f0;
  border: 2px dashed #ccc;
  padding: 16px 20px;
  max-width: 120px;
  margin-top: 24px;
}

.hero .rdc-sig-wrapper.placeholder-active .img-placeholder-text {
  display: block;
  color: #999;
  font-size: 0.8rem;
}

.hero .hero-title {
  font-size: 3rem;
  margin-bottom: 16px;
}

.hero .rdc-signature {
  max-width: 120px;
  width: 25%;
  height: auto;
  margin-top: 24px;
  opacity: 0.85;
}

.hero .section-text .subtitle {
  font-size: 1.1rem;
  color: #555;
  margin-top: 24px;
  padding-left: 16px;
  border-left: 3px solid #2F80ED;
}

/* ===== 3F Section ===== */
.section-3f {
  background: #f8f8f8;
}

.section-3f .section-img-placeholder {
  aspect-ratio: 1/1;
  background: #eee;
  overflow: hidden;
}

.section-3f .section-img-placeholder .section-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.section-3f .section-text h2 {
  font-size: 2.4rem;
  line-height: 1.5;
  margin-bottom: 24px;
  padding-left: 20px;
  border-left: 4px solid #2F80ED;
}

.section-3f .section-text .quote {
  font-size: 1rem;
  font-style: italic;
  color: #2F80ED;
  margin-bottom: 8px;
}

.section-3f .section-text .quote-info {
  font-size: 0.85rem;
  color: #999;
  line-height: 1.8;
}

/* ===== Requirements Section ===== */
.section-req .section-text h2 {
  font-size: 2.5rem;
  margin-bottom: 12px;
  padding-left: 20px;
  border-left: 4px solid #2F80ED;
}

.section-req .section-text .desc {
  font-size: 1rem;
  color: #2F80ED;
  margin-bottom: 12px;
}

.section-req .section-text .detail {
  font-size: 1rem;
  color: #666;
  margin-bottom: 24px;
  line-height: 1.8;
}

.section-req .cta-link {
  display: inline-block;
  padding: 10px 24px;
  font-size: 0.9rem;
  background: #2F80ED;
  color: #fff;
  border: 1px solid #2F80ED;
  border-radius: 6px;
  transition: all 0.2s;
}

.section-3f .cta-link {
  display: inline-block;
  padding: 10px 24px;
  font-size: 0.9rem;
  background: #fff;
  color: #1a1a1a;
  border: 1px solid #1a1a1a;
  border-radius: 6px;
  transition: all 0.2s;
  margin-top: 24px;
}

.section-3f .cta-link:hover {
  background: #1a1a1a;
  color: #fff;
}

.section-req .cta-link:hover {
  background: #1a6dd4;
  border-color: #1a6dd4;
}

.cta-link--blue {
  background: #2F80ED !important;
  color: #fff !important;
  border-color: #2F80ED !important;
}

.cta-link--blue:hover {
  background: #1a6dd4 !important;
  border-color: #1a6dd4 !important;
}

.download-btns {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.download-btns a {
  display: inline-block;
  padding: 16px 32px;
  font-size: 1rem;
  text-align: center;
  border: 2px solid #1a1a1a;
  transition: all 0.2s;
  max-width: 320px;
}

.download-btns a:hover {
  background: #1a1a1a;
  color: #fff;
}

.download-btns .btn-primary {
  background: #2F80ED;
  color: #fff;
  border-color: #2F80ED;
}

.download-btns .btn-primary:hover {
  background: #1a6dd4;
  border-color: #1a6dd4;
}

/* ===== Proposal Section ===== */
.section-proposal {
  background: #f0f0f0;
  color: #1a1a1a;
}

.section-proposal .section-text h2 {
  font-size: 2.8rem;
  margin-bottom: 16px;
}

.section-proposal .section-text .lead {
  font-size: 1rem;
  color: #555;
  margin-bottom: 4px;
  line-height: 1.8;
}

.section-proposal .section-text .sub-title {
  font-size: 2.5rem;
  margin-bottom: 12px;
  font-weight: 700;
}

.section-proposal .section-text .proposal-desc {
  font-size: 1rem;
  color: #2F80ED;
  line-height: 1.8;
  margin-bottom: 24px;
}

.section-proposal .cta-link {
  display: inline-block;
  padding: 10px 24px;
  font-size: 0.9rem;
  background: #fff;
  color: #1a1a1a;
  border: 1px solid #1a1a1a;
  border-radius: 6px;
  transition: all 0.2s;
}

.section-proposal .cta-link.cta-link--blue {
  background: #fff;
  color: #1a1a1a;
  border-color: #1a1a1a;
}

.section-proposal .cta-link.cta-link--blue:hover {
  background: #1a1a1a;
  color: #fff;
}

.section-proposal .cta-link:hover {
  background: #1a1a1a;
  color: #fff;
}

.section-proposal .section-img-placeholder {
  aspect-ratio: 4/3;
  background: #ddd;
}

/* ===== Vision Section ===== */
.section-vision .vision-punch {
  font-size: 2.5rem;
  line-height: 1.3;
  margin-bottom: 12px;
  color: #1a1a1a;
}

.section-vision .vision-lead {
  font-size: 1rem;
  color: #666;
  line-height: 1.8;
  margin-bottom: 4px;
}

.section-vision .vision-end {
  font-size: 1rem;
  color: #2F80ED;
  margin-bottom: 24px;
}

.section-vision .section-text .divider {
  width: 60px;
  height: 3px;
  background: #2F80ED;
  margin-bottom: 32px;
}

.section-vision .cta-link {
  display: inline-block;
  padding: 10px 24px;
  font-size: 0.9rem;
  background: #2F80ED;
  color: #fff;
  border: 1px solid #2F80ED;
  border-radius: 6px;
  transition: all 0.2s;
}

.section-vision .cta-link:hover {
  background: #1a6dd4;
  border-color: #1a6dd4;
}

/* ===== Footer ===== */
.footer {
  background: #1a1a1a;
  color: #999;
  padding: 48px 60px 36px;
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-brand {
  margin-bottom: 4px;
}

.footer-logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 2px;
}

.footer-slogan {
  font-size: 0.9rem;
  color: #777;
  margin-top: 4px;
}

.footer-contact {
  font-size: 0.9rem;
}

.footer-contact a {
  color: #2F80ED;
  transition: color 0.2s;
}

.footer-contact a:hover {
  color: #5a9ff5;
}

.footer-legal {
  font-size: 0.8rem;
  color: #999;
  display: flex;
  gap: 24px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid #333;
}

.footer-legal a {
  color: #999;
  transition: color 0.2s;
}

.footer-legal a:hover {
  color: #ccc;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .navbar {
    padding: 0 20px;
    height: 60px;
  }

  .navbar nav {
    display: none;
  }

  .section {
    min-height: auto;
    padding: 80px 0 60px;
  }

  .section-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 0 24px;
  }

  .hero .section-text h1 {
    font-size: 2.2rem;
  }

  .hero .section-text h1 .damn {
    font-size: 3rem;
  }

  .section-3f .section-text h2 {
    font-size: 2rem;
  }

  .section-req .section-text h2 {
    font-size: 1.8rem;
  }

  .section-proposal .section-text h2 {
    font-size: 2rem;
  }

  .section-vision .section-text h2 {
    font-size: 1.6rem;
  }

  .download-btns a {
    max-width: 100%;
  }
}

/* ===== Requirements Page ===== */
.req-page-hero {
  padding-top: 120px;
  padding-bottom: 80px;
  text-align: center;
}

.req-page-hero h1 {
  font-size: 2.8rem;
  margin-bottom: 16px;
}

.req-page-hero .lead {
  font-size: 1.2rem;
  color: #555;
  max-width: 600px;
  margin: 0 auto;
}

.req-features {
  padding: 80px 0;
}

.req-features .feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 40px;
}

.req-features .feature-item {
  text-align: left;
}

.req-features .feature-item h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: #2F80ED;
}

.req-features .feature-item p {
  font-size: 0.95rem;
  color: #666;
  line-height: 1.8;
}

.req-download-section {
  padding: 100px 0;
  background: #fafafa;
}

.req-download-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 60px;
}

.req-download-inner .text-side h2 {
  font-size: 2.2rem;
  margin-bottom: 16px;
}

.req-download-inner .text-side p {
  font-size: 1rem;
  color: #555;
  margin-bottom: 32px;
  line-height: 1.8;
}

.req-download-inner .price-cards {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.price-card {
  border: 2px solid #eee;
  padding: 28px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: border-color 0.2s;
}

.price-card:hover {
  border-color: #2F80ED;
}

.price-card .price-info h4 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.price-card .price-info span {
  font-size: 0.9rem;
  color: #999;
}

.price-card .price-tag {
  font-size: 1.4rem;
  font-weight: 700;
  color: #2F80ED;
}

.price-card .price-tag.free {
  color: #333;
}

.price-card a {
  padding: 10px 24px;
  background: #2F80ED;
  color: #fff;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.price-card a:hover {
  background: #1a6dd4;
}

@media (max-width: 768px) {
  .req-page-hero h1 {
    font-size: 2rem;
  }

  .req-features .feature-grid {
    grid-template-columns: 1fr;
    padding: 0 24px;
  }

  .req-download-inner {
    grid-template-columns: 1fr;
    padding: 0 24px;
  }
}

/* ===== About Page ===== */

/* Navigation */
.about-navbar {
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.about-navbar .back-link {
  font-size: 0.9rem;
  color: #555;
  transition: color 0.2s;
}

.about-navbar .back-link:hover {
  color: #2F80ED;
}

/* Hero */
.about-hero {
  min-height: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(10,10,10,0.85), rgba(26,26,46,0.85), rgba(22,33,62,0.85)),
              url('../images/about-hero.jpg') center/cover no-repeat;
  padding: 140px 60px 100px;
}

.about-hero-inner {
  max-width: 800px;
  text-align: center;
}

.about-hero-title {
  font-size: 3.5rem;
  color: #fff;
  margin-bottom: 32px;
  letter-spacing: 2px;
}

.about-hero-formula {
  font-size: 1.4rem;
  color: #2F80ED;
  margin-bottom: 40px;
  letter-spacing: 1px;
}

.about-hero-desc {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.75);
  line-height: 2;
  margin-bottom: 16px;
}

/* Roadmap */
.about-roadmap {
  padding: 100px 60px;
  background: #fff;
}

.about-roadmap-inner {
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.8rem;
  color: #2F80ED;
  letter-spacing: 3px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 12px;
}

.roadmap-title {
  font-size: 2.4rem;
  margin-bottom: 12px;
}

.roadmap-subtitle {
  font-size: 1rem;
  color: #666;
  margin-bottom: 60px;
}

.roadmap-steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  margin-bottom: 60px;
}

.roadmap-step {
  flex: 1;
  max-width: 220px;
  text-align: center;
}

.step-circle {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  margin: 0 auto 16px;
}

.roadmap-step.active .step-circle {
  background: #2F80ED;
  color: #fff;
}

.roadmap-step.future .step-circle {
  background: transparent;
  border: 2px solid #2F80ED;
  color: #2F80ED;
}

.step-title {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.step-status {
  display: inline-block;
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 12px;
  margin-bottom: 12px;
}

.status-done {
  background: #e8f5e9;
  color: #2e7d32;
}

.status-progress {
  background: #e3f2fd;
  color: #1565c0;
}

.status-planned {
  background: #f3e5f5;
  color: #6a1b9a;
}

.status-future {
  background: #fff3e0;
  color: #e65100;
}

.step-sub {
  font-size: 0.8rem;
  color: #999;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 0.85rem;
  color: #666;
  line-height: 1.6;
}

.roadmap-arrow {
  font-size: 1.5rem;
  color: #ccc;
  padding-top: 24px;
  margin: 0 8px;
}

.roadmap-timeline {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  font-size: 0.9rem;
  color: #999;
}

.timeline-line {
  width: 120px;
  height: 1px;
  background: #ddd;
  margin: 0 16px;
}

/* CTA */
.about-cta {
  background: #1a1a1a;
  padding: 100px 60px;
  text-align: center;
}

.about-cta-inner h2 {
  font-size: 2.2rem;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.5;
}

.about-cta-desc {
  font-size: 1rem;
  color: #999;
  margin-bottom: 40px;
}

.qr-placeholder {
  width: 200px;
  height: 200px;
  background: #333;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: #666;
  font-size: 0.9rem;
}

.about-social {
  font-size: 0.85rem;
  color: #777;
}

/* About page responsive */
@media (max-width: 768px) {
  .about-hero {
    min-height: auto;
    padding: 120px 24px 60px;
  }

  .about-hero-title {
    font-size: 2.2rem;
  }

  .about-hero-formula {
    font-size: 1.1rem;
  }

  .about-roadmap {
    padding: 60px 24px;
  }

  .roadmap-steps {
    flex-direction: column;
    align-items: center;
    gap: 24px;
  }

  .roadmap-arrow {
    transform: rotate(90deg);
    padding: 0;
    margin: 0;
  }

  .roadmap-step {
    max-width: 100%;
  }

  .timeline-line {
    width: 60px;
  }

  .about-cta {
    padding: 60px 24px;
  }

  .about-cta-inner h2 {
    font-size: 1.6rem;
  }
}

/* ===== Methodology Page ===== */
.meth-hero-img {
  width: 100%;
  max-width: 800px;
  margin: 100px auto 0;
  padding: 0 60px;
}

.meth-hero-img img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
}

.meth-section {
  padding: 80px 60px;
}

.meth-section:first-of-type {
  padding-top: 60px;
}

.meth-inner {
  max-width: 800px;
  margin: 0 auto;
}

.meth-title {
  font-size: 2.4rem;
  margin-bottom: 24px;
  color: #1a1a1a;
}

.meth-title--big {
  font-size: 4rem;
  margin-bottom: 8px;
}

.meth-subtitle {
  font-size: 1rem;
  color: #666;
  margin-bottom: 48px;
}

.meth-text {
  font-size: 1rem;
  color: #444;
  line-height: 2;
}

.meth-text p {
  margin-bottom: 16px;
}

.meth-text strong {
  color: #1a1a1a;
}

/* Principles */
.meth-principles {
  margin-top: 20px;
}

.principle-item {
  padding: 40px 0;
  border-bottom: 1px solid #eee;
}

.principle-item:first-child {
  padding-top: 0;
}

.principle-item:last-child {
  border-bottom: none;
}

.principle-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.principle-num {
  font-size: 0.85rem;
  color: #999;
  font-weight: 700;
}

.principle-title {
  font-size: 1.4rem;
  font-weight: 700;
}

.principle-en {
  font-size: 1rem;
  color: #2F80ED;
  font-style: italic;
}

.principle-point {
  font-size: 1rem;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 16px;
}

.principle-desc {
  font-size: 0.95rem;
  color: #555;
  line-height: 2;
}

.principle-desc p {
  margin-bottom: 12px;
}

/* Mapping list */
.meth-mapping {
  list-style: none;
  margin: 24px 0;
  padding: 0;
}

.meth-mapping li {
  padding: 16px 0;
  border-bottom: 1px solid #f0f0f0;
  font-size: 0.95rem;
  color: #444;
  line-height: 1.8;
}

.meth-mapping li:last-child {
  border-bottom: none;
}

.meth-mapping li strong {
  color: #1a1a1a;
}

/* Roadmap list */
.meth-roadmap-list {
  list-style: none;
  margin: 24px 0;
  padding: 0;
}

.meth-roadmap-list li {
  padding: 12px 0;
  font-size: 0.95rem;
  color: #444;
  line-height: 1.8;
}

.meth-roadmap-list li strong {
  color: #1a1a1a;
}

/* Methodology CTA */
.meth-section .cta-link {
  display: inline-block;
  padding: 10px 24px;
  font-size: 0.9rem;
  background: #2F80ED;
  color: #fff;
  border: 1px solid #2F80ED;
  border-radius: 6px;
  transition: all 0.2s;
  margin-top: 32px;
}

.meth-section .cta-link:hover {
  background: #1a6dd4;
  border-color: #1a6dd4;
}

/* Methodology responsive */
@media (max-width: 768px) {
  .meth-section {
    padding: 60px 24px;
  }

  .meth-section:first-of-type {
    padding-top: 100px;
  }

  .meth-title {
    font-size: 1.8rem;
  }

  .meth-title--big {
    font-size: 3rem;
  }

  .principle-header {
    flex-wrap: wrap;
  }
}