:root {
    --ink:      #1c1c1c;
    --gold:     #C6B069;
    --bg-light: #faf9f5;
    --radius:   14px;
}

body {
    background: white;
    color: var(--ink);
    line-height: 1.7;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.container.narrow { max-width: 780px; }
.center { text-align: center; }

/* ============================================================
   SECTION 1 — INTRO
   ============================================================ */
.sys-intro {
    padding: 3rem 1rem 2rem;
}

.sys-intro h1 {
    font-size: clamp(1.5rem, 5vw, 2.4rem);
    margin-bottom: 1rem;
    text-align: center;
}

.sys-intro p {
    opacity: .85;
    margin: .6rem auto;
    max-width: 700px;
    text-align: center;
}

/* ============================================================
   SECTION 2 — GRID (7 systems)
   grid-3: 1 → 2 → 3
   grid-4: 1 → 2 → 4
   ============================================================ */
.sys-grid {
    padding: 2.5rem 1rem;
    background: var(--bg-light);
}

.sys-grid .container {
    max-width: 1200px;
    margin: 0 auto;
}

.intro-line {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1.5rem 1.5rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    font-size: 1.1rem;
    line-height: 1.65;
    font-weight: 400;
    color: var(--ink);
    background: white;
    border-left: 3px solid var(--gold);
    border-right: 3px solid var(--gold);
    border-radius: var(--radius);
    box-shadow: 0 2px 12px rgba(0,0,0,0.04);
}

.grid-3, .grid-4 {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 0.5rem;
}

.grid-4 { max-width: 1600px; }

.sys-card {
    text-align: center;
    padding: 1.5rem 1rem;
    background: white;
    border-radius: var(--radius);
    border: 1px solid #eee;
    transition: transform 0.2s, box-shadow 0.3s, border-color 0.3s;
}

.sys-card:hover {
    border-color: var(--gold);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}

.sys-card img {
    display: block;
    margin: 0 auto 1rem auto;
    width: 85%;
    height: auto;
    border-radius: var(--radius);
}

.sys-card a {
    color: var(--ink);
    text-decoration: none;
    border-bottom: 1.5px solid var(--gold);
    transition: opacity 0.3s;
    font-weight: 500;
}

.sys-card a:hover { opacity: 0.7; }

.sys-card h2 {
    display: inline;
    vertical-align: middle;
    margin: .5rem 0;
    font-size: 1.2rem;
    color: var(--ink);
}

.sys-card .dot-icon {
    display: inline-block;
    vertical-align: middle;
    width: 20px; height: 20px;
    margin: 0 0.4rem 0 0;
}

.sys-card p { opacity: .7; margin-top: .2rem; }

/* ============================================================
   SECTION 3 — SPLIT
   column → row at 768px
   ============================================================ */
.sys-split {
    padding: 2.5rem 1rem;
}

.split {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.split-text {
    flex: 1;
    background: var(--bg-light);
    color: var(--ink);
    padding: 2rem 1.5rem;
    border-radius: var(--radius);
    border: 2px solid var(--gold);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.split-text h1 {
    font-size: clamp(1.3rem, 3.5vw, 2.1rem);
    margin-bottom: 1.2rem;
    color: var(--ink);
}

.split-text p { opacity: .85; margin-bottom: 1.2rem; line-height: 1.7; }

.btn {
    align-self: flex-start;
}

.split-img {
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    min-height: 240px;
}

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

/* ============================================================
   SECTION 4 — FINAL
   final-grid: 1 → 3 at 768px
   ============================================================ */
.sys-final {
    padding: 3rem 1rem;
    background: #f6f4ed;
}

.sys-final h2 {
    font-size: clamp(1.3rem, 4vw, 2rem);
    margin-bottom: 1.2rem;
    text-align: center;
    line-height: 1.4;
}

.sys-final p {
    opacity: .85;
    max-width: 750px;
    margin: 1rem auto;
    text-align: center;
    font-size: 1.05rem;
    line-height: 1.7;
}

.final-grid {
    margin-top: 2.5rem;
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.final-card {
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: var(--radius);
    transition: transform 0.2s, box-shadow 0.2s;
}

.final-card:hover { transform: translateY(-4px); box-shadow: 0 8px 20px rgba(0,0,0,0.08); }

.final-card img {
    width: 150px; height: 150px;
    object-fit: cover;
    display: block;
    margin: 0 auto 1.2rem auto;
    border-radius: var(--radius);
}

.final-card h3 a { color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--gold); }
.final-card h3 a:hover { opacity: .6; }
.final-card p { font-size: 0.85rem; color: #888; margin-top: 0.4rem; }

/* ============================================================
   BREAKPOINTS
   ============================================================ */

@media (min-width: 480px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
    .sys-intro  { padding: 5rem 2rem 3rem; }
    .sys-grid   { padding: 4rem 2rem; }
    .sys-split  { padding: 4rem 2rem; }
    .sys-final  { padding: 5rem 2rem; }

    .intro-line { padding: 2rem 3rem; margin-bottom: 3rem; }

    .grid-3 { grid-template-columns: repeat(3, 1fr); gap: 2rem; padding: 0 2rem; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }

    .split  { flex-direction: row; align-items: stretch; gap: 2rem; }
    .split-img { flex: 1.3; min-height: unset; }
    .split-img img { height: 100%; }
    .split-text { padding: 3.5rem; }

    .final-grid { grid-template-columns: repeat(3, 1fr); gap: 2.5rem; margin-top: 4rem; }
    .final-card img { width: 180px; height: 180px; }
}

@media (min-width: 1024px) {
    .sys-intro { padding: 6rem 2rem 4rem; }
    .sys-final { padding: 6rem 2rem; }
    .grid-4    { grid-template-columns: repeat(4, 1fr); gap: 2rem; padding: 0 2rem; }
}